Method of driving ink jet head

[Detailed Description of the Invention]

[Industrial Application] The present invention relates to the drive method of the ink jet head which makes ink breathe out according to an image signal, and records on a recorded material. [Description of the Prior Art] Recorders, such as a printer, a copying machine, and a facsimile, are constituted so that the picture which comprises a dot pattern on recorded materials, such as paper and a plastic thin board, may be recorded based on picture information. The above-mentioned recorders are an ink-jet type and a wire dot type by a recording method, It can divide into a thermal type, a laser beam type, etc., and the ink-jet type (ink-jet recording device) of them carries out discharge flight of the ink (recording ink) drop from the discharge mouth of an ink jet head, and it is constituted so that this may be made to adhere to a recorded material and may be recorded. There are what uses an electric heat conversion object, and a thing which uses an electric machinery conversion object in the ink jet head (recording head) with which this ink-jet recording device is equipped as a discharge energy generation object. The inkjet method which carries out discharge of the ink using thermal energy with electric heat conversion object (heater element) °, With the art known by U.S. Pat. No. 4723129, 4740796, etc., the response to an image signal is good, the miniaturization by high-density discharge mouth arrangement is possible, and a color picture can be recorded easily, and there is an advantage, like the noise under record is small. Also in this, formation of a multi-nozzle is easy for especially a type on demand, and the waste ink function is widely used from the reasons of needlessness etc. Drawing 22 is a typical exploded perspective view illustrating a typical structure of an ink jet head of exploiting thermal energy. A plurality of heater elements for discharge by which 101 is elaborated by the substrate made from silicon (St), and 102 is elaborated in the figure at the substrate (1 Fever conversion object), 103 is a discharge mouth for correspondence Was prepared expulsion of an ink droplet to each of the heater element, The liquid flow channel by which 104 is elaborated in each of the above-mentioned heater element, the glass top plates in which 105 forms the ceiling of liquid flow channel 104, and 106 are support plates made from AE with which the above-mentioned substrate 101 is attached by adhesion material. Ink is directly in contact with heater element 104, or in contact with support plate 106 via the thin protective film of several micro or less to scratch. In the figure, although the arrangement density of heater element 102 is based also on storage density, it is usually a 3~30-/IIII grade. In order to obtain a practical record speed using such an ink jet head, according to the image signal of about 10,000 several 100~numbers, electric pulse-like energy for a drive is given to each heater element 102 in 1 second. By the electric energy, each heater element generates heat and air bubbles are generated by the ink in the above-mentioned liquid flow channel 104. Ink breathes out from the above-mentioned discharge mouth 103 with the pressure of the air bubbles, and a picture is recorded on Record orchid of a recorded material not shown in the figure. If record is started with the above-mentioned Ink and a head, the heat which occurred from heater element 102 is consumed by ink discharge, and it does not cut, but the heat which remained is accumulated. The amount of thermal energies which occurs in an ink jet head is changed according to some of image signals. In an ink jet head with a plurality of heater elements, calorific value distribution can become uneven in the direction of a row of a heater element under the pattern of a certain image signal. These thermal storage, calorific value change, and calorific value distribution unevenness become an uneven cause of change of head temperature, or head temperature. In the ink jet head using thermal energy, if ink temperature rises by Temperature rising of a head, the discharge volume of ink increases, the rise of image concentration is brought about, therefore thermal storage of the above-mentioned head, change of temperature, and temperature distribution unevenness will serve as change and picture nonuniformity of image concentration, and will appear. The whole image concentration is also gone up and down by the upper and lower sides of external world temperature. These phenomena also Laugh deterioration of record grace or picture grace, and there is a problem also on the reproducibility of a picture. In order to solve these problems, it is conventionally indicated to a U.S. Pat. No. 4719472 item, JP,1-133748,A, JP,63-116875,A, Japanese Patent Application No. No. 184416 [ one to ], etc., The means which earns a temperature detecting means, turns on and turns off an auxiliary heating means according to the detected temperature, and keeps head temperature uniformly and/or constant in a head is proposed. The head composition which has arranged the temperature sensor and the heating heater in an ink reservoir is indicated by U.S. No. 4719472. The ON/OFF crack surface of the heating method is carried out to JP,1-133748,A by the temperature information from the both sides of the temperature sensor provided in the common liquid interior of a room, and the temperature sensor formed in the common liquid room entrance part, The method of controlling so that the temperature gradient of recording ink does not occur is indicated, and the head provided with the temperature detecting means is indicated to JP,63-116857,A aside from the heater element for carrying out discharge of the ink into each liquid flow channel. The substrate by which the temperature sensor for Japanese-Patent-Application-No. No. 184416 [ one to ] Si Roughly to detect the temperature of a substrate is elaborated is indicated. It is while - and the application are provided with the heating method for heating a head other than the heater element for discharge and the heating concerned amends the temperature distribution of a head, The ink jet head provided with the control means alternatively driven so that it may generate heat to such an extent that the discharge whose above-mentioned heater element is ink does not arise is indicated. As a method of using an auxiliary heating means, it sets to JP,61-146550,A aside from the above-mentioned prior example, By setting up the electric signal of the range in which ink does not carry out discharge, the heating control means which heats ink is proposed, and it sets to Provisional Publication No. No. 61489948, The Hend drive advance 1 Electricity 'S energizing means which energizes predetermined bias power supply to a heater element is proposed, and it sets to JP,62-220345,A further, The composition which establishes the heating method which generates the thermal energy which does not form an ink droplet on the heat energy generating means for ink discharge is proposed, In JP,63-134249,A, the composition which establishes the 20th heat energy generating means for controlling ink temperature near the thermal energy generating object for ink discharge!! The proposal is carried out. [The technical issue which an invention tends to solve] The artificer investigated the relation of the temperature of the ink jet head of a form and discharge volume which are shown in Drawing 22. In the ink jet head using this thermal energy, the temperature near [ the ] the heater element was detected using the temperature change of the resistance of the temperature detection layer between heater element 102 and ink. The thermo sensitive register also detected the temperature of support 1106. About 14 heater elements per 1IllI are arranged by the Si substrate of about 8 Men-XIQsm, and heater element 102 impressed the electric pulse about 50microper time J. Drawing 23 is a graph which shows the relation of temperature and discharge volume when changing the frequency and head temperature which give this electric pulse. If temperature near the heater element was used in between, the temperature in front of each electric pulse impression was monitored. From the experimental result shown in the figure, the discharge volume of ink found out what is determined by only the temperature near the heater element. Next, the frequency which impresses an electric pulse was fixed to about 2 kHz, and the rise-in-heat curve near the heater element immediately after a repetition impression start was measured. Drawing 24 is a graph which shows the result of having measured the temperature near [ in front of each electric pulse impression ] the heater element. From the graph of Drawing 24, it found out that the temperature near the heater element did the several layer C rise of in about 0.1 second after a drive start. Substrate 101 and support Fi106 are stuck by adhesion of a different-species material called Si and AIl, and this is Attribution(ed) that heat resistance in the meantime cannot ignore as compared with the heat resistance in a substrate, or heat resistance of a support plate, and for a substrate's own calorific capacity to be small. The 512A1.O1 grade which is the material whose coefficient of thermal expansion it is hard and is low like a semiconductor etc. in order to form heater element 102 in basis [101 by a thin film in the ink jet head (it may be called a heat ink jet head below) which uses a heater element (electric heat conversion object) for ink discharge is To be chosen. In order to lower that processability is good as support Fi106 since it carries in the main part of a recorder, and heat dissipation resistance, cheap metal, such as AN, is used as a material with high heat conductivity. Therefore, in order to lower this adhesion Fever resistance, the adhesives of thermoelectrical conductivity are used, but like Above, pasting to an inorganic nonmetallic substance and metal is required, and the present condition is difficult to remove the rise in heat in the above-mentioned short time. As a result, in image recording, the discharge volume of a liquid ink drop changes rapidly, and causes concentration nonuniformity. In such a viewpoint, when prior art is examined, a technical subject which is described below occurs. First, in the ink jet head by U.S. Pat. No. 4719472 and JP,1-133748,A, the temperature sensor is attached in the common liquid room, i.e., a reservoir. According to this, it is possible to detect the temperature change of a rapid substrate and to control the temperature of the substrate, but high speed's being required of control, therefore a control device become large-scale, and the subject that the cost of a head is raised as a result occurs. It is effective to perform temperature control using this also with the head indicated to Provisional Publication No. 61~No. 116857, since the temperature detecting means is established near the heater element in each liquid flow channel. However, many temperature detecting means are needed in this case, and further, since a comparison circuit, a Summer circuit, and a control means also become large-scale, the subject that the cost of a head is high occurs. the point of elaborating the temperature sensor on the substrate although there is an advantage which can perform temperature control comparatively precisely also with the head indicated to Japanese Patent Application No. No. 184416 [ one to ] and the point which controls that temperature distribution should be amended using a heater element -- the composition of a head -- ?I -- the subject that it becomes coarse occurs. Although the auxiliary exothermic means of the head is proposed in each invention of JP,61-146550,A, JP,61-189948,A, JP,62-220345,A, and JP,63-134249,A, there is no proposal about the method of the formation of Temperate fixed of a head or the method of head temperature distribution equalization. The object of the present invention is as follows. Be made in view of a technical subject described above, and keep temperature of a substrate constant with easy composition, without establishing a temperature detecting means and a complicated control means in a substrate. Provide a drive method of an ink jet head which can perform highly defined and stabilized record without picture nonuniformity by making temperature distribution uniform. [Means for Solving the Problem] A substrate by which one or more heater elements which make one or more discharge mouth and each discharge mouth for the present invention to carry out discharge of the ink generate correspondence Do thermal energy are elaborated, In a drive method of an ink jet head possessing a support plate or a casing to which the substrate is attached, Thermal energy for carrying out discharge of the ink according to an image signal is generated in the heater element, When performing image recording by an ink jet head whose heat resistance which passes the support plate or a casing among heat resistance between the substrate and the exterior is lower than heat resistance which does not pass the support plate or casing, When the ink jet head carries out discharge of the ink of the maximum volume Vmax, thermal energy generated in the substrate is set to Emax, If thermal energy which generates discharge volume of ink according to the image signal in the substrate V and then is set to E, Temperature distribution is made uniform while keeping temperature of a substrate constant with easy composition at the time of E#EsaxO, without establishing a temperature detecting means and a complicated control means in a substrate by having composition controlled so that Ba nu-ax-nu always (E■ax-E) becomes a steady value mostly, A drive method of an ink jet head which can perform highly defined and stabilized record without picture nonuniformity is provided. [For Work ] And also [ according to the drive method of an ink jet head of the present invention, it generates thermal energy according to an image signal in a heater element on a substrate ], By generating thermal energy independent of an image signal, or thermal energy according to a contrary of an image signal on a substrate, it becomes possible to keep constant temperature on the substrate, especially temperature near the heater element, and to make uniform temperature distribution of an arrangement direction of a heater element on a substrate. [Example] Example 1: Drawing 1 (a), (b), and (c) is a figure showing a drive pattern of a heater element in the 1st example of a drive method of an ink jet head by the present invention, Drawing 2 (a) is a drive circuit figure used in the 1st example of Drawing 1, and Drawing 2 (b) is a timing chart for driving a circuit of Drawing 2 (a). In Drawing 1, 1 shows an example of a character pattern and A pot of each sequence is simultaneously breathed out in the pattern. When 11 records the 1st row of the pattern, it is an electric pulse shape given to each heater element. Similarly, 12.13.14 is an electric pulse shape given to each heater element, respectively when recording the 2nd row of the pattern, the 3rd row, and the 4th row. Time interval tau of an electric pulse and an electric pulse is constant. Quantity of heat QON which each electric pulse is W and becoming pulse width when an image signal is ON, is the becoming pulse width w2 when an image signal is OFF, and occurs at the time of ON, and quantity of heat Q which occurs at the time of OFF. A difference of FF is set up to become energy Q which an ink droplet carries out. In a drive circuit of Drawing 2 (a), and a timing chart of Drawing 2 (b), a latch is built in a shift register, data of a picture which should be recorded is sent synchronizing with a clock, and, subsequently a latch pulse is sent. Since it is not preferred to drive simultaneously from heater element H corresponding to a plurality of discharge mouths, -H, Is, and a publicly known reason, in this example, it classifies and drives to four blocks. Therefore, four enabling pulses (each pulse width is W+), E~A, ENB, ENC, and END, are sent. A one shot Multi-high break is set to only time of W, being high-level synchronizing with a standup of each enabling pulse ENA, ENB, ENC, and END. Then, a heater element drives only time of w2 regardless of image data. In this example, an ink jet head of a form shown in Drawing 22 is used. To this ink-jet, a throat is a recording head which carries out Calorie use and carries out discharge of the ink, and is provided with an electric heat conversion object for generating thermal energy. By growth of air bubbles by film boiling which arises by thermal energy impressed with the electric heat conversion object, from a discharge mouth, this ink jet head makes ink breathe out, and records a picture. The above-mentioned ink jet head has eight discharge mouths 103, liquid flow channel 104 per is connected to each discharge mouth, and heater element 102 for discharge per piece is provided into each liquid flow channel. While a throat moves to substrate 101 to same perpendicularly, in a throat, support plate 106 is a product made from A.I. Artificial Intelligence! in same which records on a recorded material, the size 2 -- S and =20 Xiang nX50 n+m it is t+ =3-mm thickness -- thermal conductivity lambda = 230 -- they are /■-°C, and volume specific heat rho+C + =2.4 XIO"J/m and °C. Top plate 105 is glass, and the size is S t'= 1oss X15mm and tt==1 -1 thickness, and they are thermal conductivity lambda-1, 5 w/m and "C, volume specific heat rhozcz-1, and 6 xto'J/% and°C. area which has touched outside -- a support plate -- Sl-1500tm" and top plate 105 Te -- Sl'-150m"?" -- it is. As for substrate 101 of the head, a heat transfer coefficient [ as opposed to / do not touch and / the exterior ] is alpha=30w/@ except the top plate or a support plate. Heat resistance between -°C1 substrate 101 and support plate 106 was Rg-0 or 9-degreeC/-. What passes along support plate 106 among heat resistance of substrate 101 and the exterior at this time, R+-L+/(Sl l 1)+Rg+1/(R2=tz/(Stlambdaz) +Rgtl/(Sz'cr) a thing [ S+' (r) =23.1-degreeC/w ] passed along top plate 105 namely, other than this again being =227degreeC/i+ R+ (it is Rz.)) calorific capacity C of support plate 106 and top plate 105 and C2 -- respectively -- C1=rhoIcIrho and t=7.2J/' -- they are cCz-rhozCtrho and t=0.24J/'C -- C and <C -- it comes out. That is, thermal energy which remained to substrate 101 is spread in the ground at support plate 106, is accumulated in the support plate, and is radiating heat outside. Next, it is considered as pulse width which can perform discharge where ink was stabilized also as 0w which describes a deciding method in [ w and wt ] a front S oneself electricity pulse, voltage v suitable for Is a driving circuit, and of. Next, when driving all the heater elements 102 for discharge for every partition between fixed and performing discharge of ink with W and becoming pulse width, as for the head, temperature begins to go up gradually. A thermo sensitive register detects temperature of support plate 106 of the head. The temperature will be set to Tomega if the temperature reaches uniformly. Next, said is carried out to the above, and the temperature will be made into T'omega, if ink gives a suitable electric pulse which is a grade which does not carry out discharge and pulse-width W'' Becoming to the same heater element as the above, measures the same temperature as the above and reaches uniformly on voltage Vop shorter than Wl. If T'oozetaTa which changes Wl and performs same measurement is reached until T' (1) becomes almost equal to Too, W' at that time will be set to Wi. Although a permissible error of T'omega and Tomega is based also on heat resistance between substrate 101 and support plate 106, or heat dissipation resistance of support plate 106, it is 1~2degreeC. As a deciding method of W2, it can ask also by W2-(Tco -Tenv) w'/(T'omega-Tenv) simpler. Tenv is environmental temperature here. wl is determined first, and after asking for voltage Vorho in which ink carries out discharge stably, it may shift to a procedure of determining above-mentioned w2. Thus, Beak steel ax -V in Claim 1 (Emax-E) can be mostly maintained at a steady value, without performing special temperature control by defining pulse width, w, and wl. The reason is as follows. In the above-mentioned W and a procedure of determining W2, it is W. With a case where an electric pulse is given to the heater element with becoming pulse width, it is equal [ heat flux which flows into the support plate in both case ] that temperature of the support plate is equal W2 in a case where an electric pulse is given to same heater element with becoming pulse width. as mentioned above, most flows of heat of substrate 101 and the exterior pass the support plate 106, and ink-jet Henodo used in this example sets it to Drawing 1 -- Q and Q -- since come out and it is What deducted heat flux which faces to the support plate from thermal energy generated in the substrate serves as energy which the Inc. carries out to the exterior by discharge. Here R11 from which a value of this carrying-out Engineering is set to V, "/R, and (w, -w) per 1 time of discharge is an electrical resistance value of a heat element. Since kinetic energy of a drop can generally be disregarded as compared with thermal energy which a drop has, energy which the drop (ink) carries out to the exterior serves as rho CV (T, -T, lv). here -- rho and C -- respectively -- density of ink, specific heat, and T1 -- wl -- temperature of an ink droplet which is the temperature near [ when driving with pulse width ] the heater element, and carries out discharge is also abbreviation to this -- it is equal. Therefore (1(Vop"/Rh)#+ Wz) "rhoCVa (Th-T) ..-... -- (1) is realized. Now, thermal energy which n discharge mouths generate in a heater element among N discharge mouths when an ink droplet of T and becoming temperature carries out discharge by v and becoming volume, respectively, E= (Vop -- /Rh) (nw++(N n) wz) and ... energy which is (2) and ink carries out by discharge -- EaJc= n p CVX (TX-T, lv) ----- it is (3). Therefore, energy which remains to substrate 101 and flows into the support plate 106 later, Er*s-E -E*Jc=(Vopt/Rh) (n w+(N-n) wzl nrhoCV) T, -T, v= (Vat"/RJ (n W, +(Nn) wtl-nrhocV 4(Th-Tenv)+npC (Vd (Th-T, v) -V (- T, and T and 1. l ---- (4) here)))) When the above-mentioned formula (1) is used, it is Er*5=N(Vo, "/Rh) Wz+n pC (L(Tk-T)-V (TX-T, l --- (set to 51.))). Since v8 is an increasing function of T, as relation between v, l, and T is shown in Drawing 23, it can be considered that El and 1 are the functions of T,. on the other hand -- a stationary state -- T X T @ RV -- El -- since it is alike and proportional -- T, "(T, -T, v) E, and/(NwzVo.) /R, -i-T -.. It becomes -(6). However, in fact, since there is calorific capacity of substrate 101 and support plate 106, in an instant does not necessarily come temperature T8 of the above-mentioned formula (6), and this is a convergence value of temperature. Drawings 3 are El of the above-mentioned formula (5), and T of 8 and the above-mentioned formula (6). It is a graph which shows a relation. In the figure, l is tt and l about a straight line of a formula (6)! Yo, . An expression of relations of a formula at the time of Are, n=O1 n=m, and n=N (5) is shown. In the figure, since all the curves cross at one point, it turns out that temperature near the heater element 102 requires feedback in the direction maintained at steady value T regardless of a value of n. If discharge volume of ink per [ at this temperature T1 ] time is set to v4, As for discharge volume of a head, ■=nV4 and the greatest discharge volume of a head are VMIIK=NV, Energy E*ax"=N(Vop "/Rh) W+ which occurs in substrate 101 then Tealuara, Mini□ and (-E)/(V, -V) =N(VOP"/Rh) Ml-(VO*"/Rh) (Nw++(N-n) wz) NVa nV4 (V, "/R) = (im, -112) It is set to --- and (7) ■4, and becomes fixed to n. Thus, whenever there is little change of environmental temperature in the case of this example, discharge of the ink droplet of fixed discharge volume can be carried out irrespective of At least of an image signal. Drawing 4 is a typical perspective view which illustrates a suitable ink-jet recording device to enforce a drive method of an ink jet head by the present invention. while an ink jet head used in this example is mounted in carriage 41 of an ink-jet recording device as shown in Drawing 4, and moving the carriage by 0.16 m/s -- 1 millisecond interval -- 500 times the discharge for /of ink of each discharge mouth to a black color, and a rest for 500 times (a person -- it returned.) Therefore, on recorded material 42, it separated for 80 mm and border record and a blank were repeated. Record gave a pause signal by 80 mm first, and performed it. As the pulse width given to each heater element at the time of this record pause, (A) W (this example), (B) Four kinds of records of 120% of pulse width of 80% of pulse width (d) wg of (C) W= which does not give an electric pulse at the time of a pause were performed. Distribution of OD value was measured by a microdensitometer after an end of record. Drawing 5 is a graph which shows the result. In Drawing 5, 50A, 50B, 50C, and 50D are the above (A), respectively, (B), (C), It is a result in each [ of (13) ] case. In the case of this example (A), OD value is constant from a record start from OD first, and OD at the time of a record start is low in a case of (B). Moreover OD is higher at the time of a record start than at (B) in (C), but it cannot say that it is enough, in (D), since calorific value at the time of a pause signal is too large, OD at the time of a record start is too high, and it returns to a normal value behind. Theoretically, a drive method of an ink jet head by this example (example 1) is effective, although [ which will keep four pictures constant if there is nothing ] room temperature change is few within the record time. However, when record covers a long time and room temperature is sharply changed by within a time [ the ], or when the reproducibility of image concentration within a period when room temperature differs greatly is required, it is preferred to perform the following control. That is, for example, by attaching a temperature sensor, heating, and/or a cooling method to support plate 106, a control means which reduces a temperature change of the support plate is established, and control which maintains temperature of the support plate at the same temperature as temperature when the above-mentioned W and w are determined by a control circuit is performed. In this case, to change of room temperature since, a second bit of speed of feedback is enough as the control. In order to enforce a drive method of this example effectively, it is required for predominant quantity of heat which remained to substrate 101 to flow into support plate 106, and most heat which remained to the substrate is wanted to face to the support plate preferably. For this reason, it is effective in top plate 105 to surround by resin etc. using glass with low heat '5 Conductivity, etc., further, about 103 discharge mouth of substrate 101 may be covered by a casing of a good material of Thermal conduction, and the temperature sensor and an auxiliary heating method may be attached to the casing. In the above-mentioned control to room temperature change, the reason for not providing an auxiliary heating method in a substrate directly is that an error is produced by heat resistance between a substrate and a support plate, and this cannot be disregarded. A temperature sensor and an auxiliary heating method are attached to a support plate as mentioned above, and when it has a means to perform control which keeps temperature of the support plate constant by a control circuit, above W2 can be determined also by following methods. Namely, it is an environmental temperature-step at an environmental test room etc., and is in a state which used the above-mentioned temperature control means, It is with a time of having continued and given correspondence Doing it thermal energy to image signal ON at all the heater elements 102 on substrate 101, and a time of continuing and giving correspondence Did do thermal energy to all the above-mentioned heater elements at image signal OFF, w2 to which electric power for performing the control becomes almost equal can also be used. If it states more concretely, w2 will be determined that a difference of these both electric power is less than 5%. By using such w2, heat flux which flows into support plate 106 from substrate 101 is kept constant, and can keep substrate temperature constant as a result. As compared with electrical resistance of a heater element, a drive method of an ink jet head by this example has it, also when wiring resistance on a substrate for supplying electric power to a heater element cannot ignore. [ effective ] It can be valid, if calorific value of the element is proportional to the length of an Enable signal mostly also when febrile elements, such as driver IC, are carried on a substrate. When ink carries out discharge by a momentary rise in heat which arises when it drives with pulse width which becomes w2, or when it has a bad influence to a heater element or ink, The object of the present invention can be achieved by distributing how to give thermal energy at the time of image signal OFF in time so that it may state later. Example 2: Drawing 6 is the present invention! It is a graph which shows a head drive pulse in an example of 2. An ink jet head used in this example is the same as that of Example 1. In this example, thermal energy generated without being based on an image signal is given with minute steady voltage in the 6th figure which becomes ■1. When according to the drive method of the 1st example a record signal is OFF and ink breathes out from one of discharge mouths, it is effective to adopt a drive method by this example. Drawing 7 shows an example of a circuit which performs a drive method of this example (example 2). Drive timing of this circuit is the same as a case of Drawing 2 of Example 1 (b). A transistor array of an output stage and parallel are provided with resistance R5~R7 in a circuit of Drawing 7. Therefore, even when each transistor of a transistor array is in a state of OFF, current flows into heater element H and -H. ■ impressed to heater element H1~H1. If each resistance of Is and R9-R7 is set to R11 and each resistance of H+""'H1 is set to R8, R tuna ■ . . = VOPRm 10R. It becomes. Although R1-R7 may be provided in a drive circuit of a head, it can decrease generation of heat of a drive circuit, and can usually make total power consumption smaller than an inside of a head, and a case which may be especially established near heater element H1~H7 where it provides in a drive circuit in that case. Drawings 8 are drive voltage [ at the time of picture sign ON ] v0., and pulse width W in this example (example 2). It is a flow chart which shows an example of a procedure which defines the steady very small voltage VIIC. In Drawing 8, 8-1 is a step which defines suitably steady very small voltage VDC in Drawing 21 first. This value is set as about [ of V at expected / 1/several ]. ■ which is stabilized from all the discharge mouths as for the following 8-2, with the ■1 applied, and can perform discharge of ink. And it is a step which defines W in a tentative way. this ■. . And it is desirable to use a minimum in the range which can perform W and discharge which carried out Is stable. The ■. It depends on convenience which [ of Wl ] is defined preferentially of circuits, such as specification of a drive transistor. Next, if this stable discharge is continued for a while and temperature of support plate 106 of an ink jet head reaches uniformly, it will be set to T1 at a step of 8-3. 8-4 is a step which gives only the Vile to the head, and the following 8-5 is a step which sets it to T, when temperature of the support plate reaches uniformly in 8-4. If 0 both who are the steps with which 8-6 compares above T1 and T2 become almost equal, '1'DC%VO1ll of this time and w, will be decided, and a procedure of this example will be ended. if -- Tt>T -- it comes out, and if it is (Step 8-7), above VOC will be lowered (Step 8-8), and it will return to a step of above 8-2. It is the ■ if it is T r > T t. , is raised (Step 8-9) and it returns to a step of above 8-2. Here, deltaTmax is an acceptable value of a difference of T1 and T2, and is 1~2degreeC like a case of Example 1. Quantitive standards which change VDC in Hisashi 8-8.8-9 when T and T2 are greatly different widely are V and %llt'1ゝ=V oc""' (T IT--v). It is good to give by / (T, -T, lv). However, T *+t v is environmental temperature and is y, C1OLD+, and V Dc (■ before change [ in / in Nlljl / the above-mentioned step 8-8 or 8-9 ], and after change.). it comes out. Like a case of Example 1, a procedure shown in Drawing 8 may be followed manually, and may be automatically performed also as that of control by CPU. When record which repeats a solid picture and a blank for an ink jet head used in this example at 801 intervals completely like the above-mentioned example was performed, the almost same result as a case of the above-mentioned example was obtained. In this example as well as a case of the above-mentioned example, a control means which reduces a temperature change of support plate 106 is established, and they are w and V. 2. By performing control maintained at temperature of the support plate when ■1 is determined, the invariability of image concentration to different room temperature can be maintained. Drive pulse ■ which is not dependent on an image signal in an ink jet head of the above-mentioned composition in this example. A following method can also be taken like a case of the above-mentioned Example 1 as a means to determine ,. Namely, it is in a state which used the above-mentioned control circuit under a condition which kept room temperature constant, time average value of the electric power when time average value of electric power for performing the control when having given image signal ON continuously to all the heater elements has continued and given image signal OFF to all the heater elements, and Hub -- a difference is specifically settled to 5% or less so that it may become equal -- as -- above-mentioned ■. , can also be selected. As compared with electrical resistance of a heater element, a drive method of an ink jet head by this example (example 2) has it, also when wiring resistance on a substrate for supplying electric power to a heater element cannot ignore. [ effective ] Although a drive method by this example is an impossible point and ink discharge at the time of image signal OFF is superior to Example 1, electric power impressed to an ink jet head becomes larger than a case of Example 1. Following space Example 3: Drawing 9 is a graph which illustrates a head drive pulse in the 3rd example of a drive method of an ink jet head by the present invention. An ink jet head used in this example is the same as that of a case of Example 1 and Example 2. The feature of this example is that thermal energy generated without being based on a Image communication * item is based on a plurality of electric pulses of very small width. In Drawing 9, it is ■. e te which is 9, and voltage and pulse width of an electric pulse (discharge pulse) which Wl gives to a heater element at image signal 08:00 is time which is impressing two or more very small pulse, and is the time from a very small pulse impression start to Above w and an impression start of a pulse of becoming width. W2 and wf are width and repetition cycles of the above-mentioned very small pulse, respectively. Therefore, the number of very small pulses is an abbreviation t p /W y piece. Drawing 10 shows an example of a circuit for driving Example 3 of Drawing 9. timing for driving a circuit of Drawing 10 uses a case of Example 1 said, and comes out. the [ Drawing 9 and ] -- inO [ 1 ] figure, Wang Yeyosoto multi-hive Letter generates an inner pulse also the above-mentioned very small pulse impression time. an oscillator -- a cycle -- w -- it comes out and duty I- generates a rectangle wave of W p /W f. In this example, although the above-mentioned oscillator has not taken other portions of a circuit, and a synchronization, this may be constituted, for example so that an oscillation may be started by an enabling pulse. Since a drive waveform becomes fixed by taking a synchronization, it is thought that ink discharge power is stabilized a little rather than an example of illustration, but there is no Okay. influence. ■ [ in / in Drawing 11 / this example ]. e+ W I+L, It is a flow chart which illustrates a procedure for determining w and wy. In Drawing 11, 11-1 is w and w (it is a step which defines t suitably.). It is made for W-L e /W f to become comparable as Wl expected as a standard. ■ which is stabilized from all the discharge mouths as for the following 11-2, applying a very small pulse with a parameter defined by 11-1, and can perform discharge of ink. And it is a step which defines Wl in a tentative way. As for this V op and Wl, it is desirable to set up a minimum within limits which can perform stable discharge. ■ . Whether one of the Wl(s) is defined preferentially should just choose on account of specification of a drive transistor, or a circuit. Next, when this stable discharge is continued for a while and temperature of ink jet head support plate 106 reaches uniformly, it is set to T1, but it is a step of 11-3. 11-4 is a step which impresses only the minute pulse to an ink jet head. When ink has breathed out from one of discharge mouths at this time, it moves to a step of 11-5, and performs at least one of operation which shortens t, operation which shortens wp, and the operations which lengthen Wf. When ink does not carry out discharge, in Step 11-6, waiting and its temperature are set to T2 until support plate temperature reaches a steady value. Subsequently, T1 is compared with T2 in Step 11~7, and it is ITI -T! If it becomes l<delta T1.8, a procedure of this flow chart will be ended. Here, deltaT * * x is an acceptable value of a difference of T and T2, and it sets it as about 1~2 degreeC like a case of Example 1. It is T+<T! If it becomes, it will move to the above-mentioned step 11-5, and at least one of operation which shortens t, operation which shortens W, and the operations which lengthen w is performed. operation which lengthens T, >T, operation that will move to Step 11-8 and will lengthen t if it becomes, and W, and wf -- short (at least one of the operations to carry out is performed.) Thus, test record which repeats an ink jet head by a defined drive condition, and repeats a solid picture and a blank at 8011I11 interval like a case of Example 1 was performed. As a result, a case of Example 1 and image concentration uniform almost similarly were obtained. Also in a case where it is this example, they are a case of Example 1 and Example 2, and Hitoshi, A control means which reduces a temperature change of support Fi106 is established, and it is "p+j p+W y and W 1. + If control maintained at the same temperature as a time of defining V 6 p is performed, the reproducibility of image concentration can be guaranteed to sharply different room temperature. Also in a head drive method of this example, following methods can be taken like a case of Example 1 as a means to determine specification w, t, and w of a drive pulse independent of an image signal, etc. That is, the above-mentioned control circuit is made into an operating state under a condition which kept room temperature constant, time average value of the electric power when time average value of electric power for performing the control when having given image signal ON continuously to all the heater elements has continued and given image signal OFF to all the heater elements, and Hub -- it becomes equal -- as Above wp, t, w, etc. can also be set up so that a difference may specifically be settled to 5% or less. The strong points of a drive method by this example (example 3) are that a possibility that discharge of ink will be performed at the time of image signal OFF is low, and that there are few total amounts of electric power given to a head as compared with Example 2, and they end. However, in this example, a drive circuit becomes complicated (there is the amount of A jet.). Example 4: Drawing 12 is a graph which illustrates the 4th example Mu can head drive pulse of a drive method of Do to an ink-jet by the present invention. The feature of this example is at a point using an ink jet head which can perform V#I of four values by changing width of a drive pulse. Itte, OFF, ON, ON, and ON s show a form of a drive pulse at the time of level 3 in Drawing 12 at the time of level 2 at the time of level 1, respectively, when you have no image signal. Po, Pz, and Ps are the drive pulses for generating thermal energy according to an image signal, and So, Sl, and S Engineering are the drive pulses for generating thermal energy according to a contrary of an image signal. It means that a lower subscript of these expresses a level of a signal and carries out discharge of the ink droplet of such big volume that a number is large. Drawing 13 is a mimetic diagram showing an outline of a size of air bubbles generated when a drive pulse is given to shape of a heater element used in this example, and the heater element. In Drawing 13, shape of a heater (heater element) is shown in 4, and the heater is carrying out trapezoid shape, and it is arranged on a substrate so that drive voltage may be applied between a raised bottom of the trapezoid, and a lower base. 41.42.43 shows shape of air bubbles generated at the time of picture level 12.3, respectively, and air bubbles which a trapezoid wide portion came to generate air bubbles, and produced also become large at Excluding as a picture level becomes high (i.e., as width of a drive pulse becomes long). As a result, discharge volume of ink becomes large and forms big A pot with a recorded material. this heater part (heater element) -- composition of a head of an except is the same as a case of Example 1. Thus, compared with an ink jet head of two values used by Example 3, stability and reproducibility of image concentration can be more precisely controlled by an ink jet head which performs gradation record from Example 1. Therefore, a drive method by this example is especially effective. Drawing 14 is a figure showing an example of a circuit which drives this example (example 4). In this example, one heater element H3~H7 drives at a time one by one. Therefore, although it drives with heater elements H1 and H, and Is or a becoming time lag, a problem that timing of a drive shifts is solved by arranging a row of outlet ports aslant slightly to a direction which intersects perpendicularly in the direction of relative displacement of a recorded material and a head. Drawing 14 (b) shows a timing chart for driving a circuit of Drawing 14 (a). Drawing 14 (in al and Drawing 14 (b), a clock gives timing 16 times the frequency of switching a discharge mouth to drive.) If a clear pulse is beforehand sent to CL and a clock is sent, one of output Q1~Q7 of a shift register will become high-level one by one, and one of T r l"= T P R will be set to ON one by one. In response to this, image data of 2 A bit is sent to DI and D2. ROM of 64x1 focus is connected to an output of 4 A bit counter, and above D1 and D2 is connected to the address input. the contents of this ROM -- suitably -- To wind up -- by things, a pulse of ON of 16 shots and OFF can be sent out according to DI and D2 between time when one heater element is chosen, and a heater element can be driven according to it. Drawing 15 is a flow chart which shows an example of a procedure determined as specification of above So, St, Sz, P1.Pz, and Ps in this example (example 4). V a+ in Drawing 15 + V a t V a s expresses discharge volume of ink from a head in which desired image concentration is obtained in picture levels 1 and 2.3, respectively. l In Drawing 15, 15-1 is a step which determines a drive condition to carry out at picture level 3. That is, voltage V as and pulse width W of Section 1i1 which are given to all the heater elements are carried out, and it sets up so that discharge volume may be set to Vi3. In the following step 15-2, a value of waiting and its temperature is set to T until temperature of the support plate reaches uniformly. 15-3 is a step which determines a drive condition in picture level 2. here -- Radiation of P, -- W -- Specification# of S2 (width, the number, and a cycle of each minute pulse)! It adjusts, and it sets up so that discharge volume may become almost equal to the T by V and ffi in a convergence value of support plate temperature. 15-4 is a step which determines a drive condition in picture level 1. Here, specification (width, the number, and a cycle of each minute pulse) of width w1 and Sl of Pl is adjusted, and it sets up so that discharge volume may become equal to about T by V d l in a convergence value of support plate temperature. 15-5 is a step which defines specification of So. That is, width, the number, and a cycle of each minute pulse are determined so that a convergence value of support plate temperature may become almost equal to the T. Measurement of discharge volume of ink may be based on measurement of an amount of consumption of ink, may bring breathed-out ink together in a catching bottle etc., and may measure weight. In each step of the above and 15-3.15-4.15-5, although a concrete standard of support plate temperature becoming almost equal to T changes also with structures of a head, it is a decision criterion with less than 1~2 degreeC realistic in a difference with T. While a pulse to all the heater elements may give, Hardness may be uniformly defined in a procedure of Example 4 described above and discharge volume of ink from each discharge mouth is measured, Although time and effort is taken to set up in the case of the latter which may decide on how to give a pulse given to a heater element corresponding to the discharge mouth in an above-mentioned procedure, variation in concentration between each discharge mouth can also be decreased. In this case,/(■□, -■) in Claim 1 (E, -E) is except the time of EVE and □, does not have 1 Yo only by becoming a steady value, and sets to each discharge mouth, (Ex E-)/(V3 Vt), (Ej El)/(Vi-V+), and (E, -E)/V3 is equal, and it takes a steady value in Cut and a usual state. Cokote, E, and (jJ and 1.2.3) display total value of thermal energy generated in a heater element corresponding to the discharge mouth at the time of picture level j, and Vj (j-1+2+3) is the volume of ink which carries out discharge from the discharge mouth at the time of picture level j. Picture level 0 expresses image signal OFF. By performing such a setup, regardless of an image signal, it was able to become possible to keep temperature of a substrate almost constant, and was able to decrease concentration nonuniformity of a picture sharply for the same reason as a case of Example 1. Drawing 16 is a graph which shows concentration distribution at a time of making the head drive by a drive condition set up with a drive method of above-mentioned this example (example 4). On a drive condition of Drawing 16, carriage speed was made into 0.16 m/s, a discharge interval was 1 millisecond, and it performed every 805 m, i.e., every 500 times of discharge, from all the discharge mouths in order of picture level 0.1.2.3. In Drawing 16, 16-1.16-2.16-3 shows concentration distribution in picture level 1.2.3, respectively. 16-4.16-5.16-6 is the each picture level L when a drive (conventional example) without thermal energy generated according to a contrary of an image signal is performed, and the concentration distribution in 2.3. According to the drive by this example, image concentration was able to be made more uniform than a conventional example so that clearly from the 16th time. When performing gradation control like this example, it is necessary to stop the nonuniformity of record concentration small especially. Therefore, as example 1~example 3 also described, a picture with good - layer was obtained by establishing a control means which reduces a temperature change of a support plate, and maintaining at temperature when specification of a drive pulse [ in / for temperature of the support plate / each above-mentioned picture level ] is determined by a control circuit. In a head drive method of Example 4, there are also following methods as a means to determine specification of a drive pulse in each picture level. That is, it is while using the above-mentioned control circuit under conditions that environmental temperature is certain, Thermal energy according to arbitrary image signal levels which included also in image signal OFF, - Time average value of electric power for performing the control when having given continuously appearance at all the heater elements on a substrate, There are also time average value of the electric power when having continued and given thermal energy according to a different image signal from the image signal level to - appearance at all the above-mentioned heater elements, and a method of spreading Hub etc. it is made to become. Example 5: Drawing 17 (a) is a timing chart which illustrates a head drive pulse in the 5th example of a drive method of an ink jet head by the present invention, and Drawing 17 (b) is a mimetic diagram showing arrangement of a heater element on a substrate of a suitable head to impress a drive pulse of Drawing 17 (a). The feature of this example is a heater element on substrates other than a heater element for discharge, and is generating thermal energy according to a contrary of an image signal. In Drawings (a) (b) 17 and 17, H1~H1 is a heater element for discharge, and it is an auxiliary heater element which generates H and thermal energy according to a contrary of Is an image signal. except arrangement of a heater element on the substrate, an ink jet head used in this example turns on what was used in Example 1, and substance, and it comes out of it. d1~d, Is, and a drive pulse impressed to the heater element H and ~H1, respectively are shown, V, voltage of Is a drive pulse, and a town show pulse width, and tau shows a cycle. An electric pulse impressed to d, Is, and the auxiliary heater element Hs according to a contrary of an image signal is shown, and the length of this electric pulse is proportional to the pulse width W1. Arrangement of the auxiliary heater element H3 is all the heater element H+" for discharge as much as possible. - It is desirable to carry out said from H* and to make it distance of a grade. The w, ■. It is determined in the range which is stabilized from Is and each discharge mouth and can perform discharge. The electric pulse d,; although pressure is arbitrary, in order to simplify a circuit, at this example, it is the ■. It was presupposed that it is the same. Pulse width of the electric pulse d, was set up so that it might be set to nXw, when the number of image signals OFF was n on the basis of the pulse width W1. A deciding method of resistance of auxiliary heater element H1 is based on the same view as a case of Example 1, A convergence value of temperature of support plate 106 when continuing breathing out ink from all the discharge mouths to every cycle tau is set to T, next all image signals are in a state of OFF, When a convergence value of temperature of the support plate when said is carried out to the time of discharge at Hl and an electric pulse of voltage is given to every tau was made into T!, it was considered as a method of determining that it is set to T1zetaT2 by resistance of the H. An acceptable value of a difference of T and T2 at this time is about 1~2degreeC like a case of the above-mentioned example. Drawing 18 (a) is a figure which illustrates circuit composition which performs a head drive of this example (example 5). In the 1811st iIU (a), the Ordinary drive of every above-mentioned one heater element H1~H8 is carried out like [ this example ] a case of the above-mentioned Example 4. In this example, it replaces with a shift register in a circuit of Example 4, a decoder built-in type counter is used, and it is calorific value Q of heater element H1~H. One of ~Q, is made into high level one by one, and image data is sent synchronizing with it. . When image data is a low (L o w) (i.e., when not carrying out discharge), auxiliary heater element (heater) Hl drives. Drawing 18 (b) is a timing chart which illustrates timing of a drive of a heater element. In 10bi t, as a counter with a built-in decoder in Drawing 18 (a), M7411C4017 (Mitsubishi Electric CMO54G) can be used, for example. A head drive method of this example (example 5) has the advantage that circuit composition for a drive becomes very easy. However, when distance of auxiliary heater element H and heater element H5~H6 for discharge is large, there is a problem that a response to a temperature change by change of 0N10FF of a discharge signal is low. For example, when distance of auxiliary heater element H1 and heater element H1~H for discharge is about 5 steel - on a Si substrate, according to heat conduction logic, time for heat to spread a Si-substrate top only 5-mm distance will be about 0.2 second. Therefore, since -7 Do moves only to about 31 in the meantime when recording, while moving a head at speed of 0.16a+/s, heat conduction time of Kamikita can be disregarded. As a result, when a picture placing rate changes rapidly, concentration nonuniformity may remain somewhat. There is also a problem that thermal energy which remains to a substrate becomes unevenness somewhat. Namely, although total value of thermal energy which remains to a substrate always becomes fixed in this example, depending on a picture pattern, distribution of heat may become uneven. for example, a case where heater element H1~H4 is an image signal whose heater element H2~H3 is set to OFF by ON in Drawing 17 (b) -- remains of heater element H2~H4 example -- a heat process -- Flugy becomes large -- consequential -- heater element H1~H4 (! -- image concentration of ll!l becomes high a little.) However, it is even if it uses an ink jet head of easy composition according to this example, auxiliary thermal energy according to a contrary of an image signal -- the amount give of Michimasa -- by things, while keeping temperature of substrate 101 constant, temperature distribution could be made uniform, and effect sufficient in that record without picture nonuniformity can be performed was acquired. About this example (example 5) as well as a case of Example 1, it mounted in an ink-jet recording device as shows an ink jet head in Drawing 4, and did a record examination which repeats a solid picture and a blank. Carriage movement speed, discharge frequency, etc. in this case were made the same as a case of Example 1. Drawing 19 (a) is a graph which shows concentration distribution at this time. in Drawing 19 (a) -- 19-0 -- auxiliary heater element H1 -- electric power -- all (concentration distribution when not giving is shown and 19-1 shows concentration distribution at the time of giving an electric pulse to auxiliary heater element H1 by this example.) Since an interval of picture OFF of 8011I11 was provided like [ a record examination on this this example ] a case of Example 1, record without the same picture nonuniformity as a case of the above-mentioned Example 1 was able to be performed. Drawing 19 (b) is a graph which shows concentration distribution at the time of having repeated a solid picture and a blank, changing an interval (0 N-OF F interval of ij image) into a l Qmm interval, and recording it in an examination of Drawing 19 of the above (a). In Drawing 19 (b), 19-2 shows concentration distribution when not giving electric power at all to auxiliary heater element H, and 19-3 shows concentration distribution at the time of giving an electric pulse to auxiliary heater element H by this example. 19-4 in Drawing 19 (b) indicates as reference a case where a picture is recorded with a drive method of the Example 1 by a recording head used in above-mentioned Example 1. When a solid picture and a blank are repeated and an interval becomes a 10 steel - grade so that clearly also from a graph of Drawing 19 (b), it turns out that it has been improved more sharply than 19-2 which shows a conventional example for the above-mentioned reason although concentration nonuniformity remains a little. Also in a drive method of this example, a better picture was obtained by establishing a control means which reduces a temperature change of a support plate like a case of the above-mentioned example, and maintaining temperature of the support plate at temperature when the auxiliary heater element H and (7) resistance are determined by a control circuit. In an ink jet head used in this example, following methods can also be taken as a method of determining resistance of auxiliary heater element H1. Namely, it is in a state which used the above-mentioned control circuit under a condition which kept room temperature constant, Time average value of the electric power when time average value of electric power for giving image signal ON continuously to all the heater element H1~H8, making it it, and performing the control at the time of To has continued and given image signal OFF to all the heater element H1~H6, Hub -- a method of determining resistance of the above-mentioned auxiliary heater element H8 is also employable so that it may become equal, and both difference may specifically be settled to 5% or less. Example 6: Drawing 20 (a) is a timing chart of a head drive pulse in the 6th example of a drive method of an ink jet head by the present invention, and Drawing 20 (b) is a fragmentary longitudinal cross-section which illustrates arrangement of a heater element in a liquid flow channel of an ink jet head used in Drawing 20 (a). The feature of this example is driving a recording head which has a heater element which generates thermal energy according to an image signal by which correspondence Do arrangement was carried out to each discharge mouth, and every one heater element which generates thermal energy according to a contrary of an image signal. In Drawings (a) (b) 20 and 20, 20-A shows a drive pulse depending on an image signal, and 20B shows a drive pulse saved in a contrary of an image signal. A heater element which 20-1 embraces a wall of a liquid flow channel, and 20-2 embraces an image signal, and generates thermal energy in Drawing 20 (b), A heater element in which 20-3 Occurred thermal energy according to a contrary of an image signal, an electrode with 20-4 [ common to the both all thermal element ], an electrode in which 20-5 supplies electric power to heater element 20-3, an electrode in which 20-6 supplies electric power to heater element 20-2, and 20-7 show a discharge mouth of ink, respectively. The electric pulse 20-A Becoming is given to the heater element 20-2, and the electric pulse 20-B Becoming is given to front and account heater element 20-3. If the ink jet head used in this example removes a portion shown in Drawing 20 (b), said [ of it ] is carried out to a Used thing in Example 1, and it has composition. Drawing 21 is a figure which illustrates an electric circuit used for performing a head drive of this example (example 6). A circuit of Drawing 21 is different in that calorific value of heater element H0~H3 for discharge is adjusted compared with a circuit of Example 5 of Drawing 18 (a) with resistance of heater element HI'~H1 * which generates big energy according to a contrary of an image signal. however, operation of a circuit of this example of Drawing 21 -- a case [ of a circuit of Example 5 of Drawing 18 (a) ], and substance top -- Place -- it is. In an ink jet head used with a drive method of this example, Since heater element H6-degree~H1 which generates thermal energy according to a contrary of an image signal is separated from a discharge mouth rather than heater element H1~H1 which generates thermal energy according to an image signal, It is Goods to constitute so that ink may not carry out discharge by the drive of heater element H1 *~H for adjustment and '. Since it was possible to have made small distance between the two kinds of The, heater element H+ and H The, to have made it approach mutually, and to have arranged it, compared with a case of the above-mentioned Example 5, it was able to respond also to a rapid change of a picture pattern enough. These two-kind heater elements H, -H, and H+'~Hn' Since it can drive in a drive circuit of another system, flexibility of a drive condition becomes high, respectively. In image concentration by this example, homogeneity is the almost same grade as a case of Example 1, and a comparable effect was acquired. This example can be carried out using an ink jet head which has a heater element of trapezoid shape in which F@ So-called record explained with reference to Drawing 13 in Example 4 is possible. In that case, heater element H1-degree~°H*' which generates thermal energy without Response(ing) to an image signal is more enough also with rectangle shape. Although this example (example 6) has the strong point which was mentioned above compared with other examples, since the number of electrodes on a substrate increases to the number of discharge mouths, some difficulty is in correspondence nature to high density recording. According to each example described above, a temperature detecting means is established in substrate 101, A drive method of an ink jet head which can perform highly defined and stabilized record which can keep temperature of the substrate constant, can make temperature distribution uniform, therefore does not have picture nonuniformity was acquired, without providing a complicated control means. It is although a case of being valid for a serial scan type ink-jet recording device with which the present invention was carried in an ink jet head by carriage 41 was mentioned as an example and each example which it is above explained it, The present invention can apply a line type ink-jet recording device using a line type ink jet head which covers the paper width direction record section of a recorded material, etc. also to an ink jet head of other recording methods, and can attain same operation effect. The present invention can be applied also with regards to the number of an ink jet head carried in a recorder that there is nothing, when using a plurality of ink jet heads for color recording. Especially the present invention brings about an effect which was excellent also in an ink-jet recording method in a recording head of bubble jet which Canon advocates, and a recorder. About the typical composition and principle, it is preferred to carry out for example, using a fundamental principle currently indicated by a U.S. Pat. No. 4723129 specification and 4740796 specification. Although this method is applicable to both what is called a type on demand and a continuous system, On an electric heat conversion object by which correspondence Do arrangement is carried out in a sheet in which a fluid (ink) is held especially in a case on demand type, or a liquid route, At least one drive signal which gives a Sudden rise in heat exceeding correspondence Do it. nucleate boiling to recorded information is impressed, Since make an electric heat conversion object generate thermal energy, a thermal action side of a recording head is made to carry out film boiling, one to one correspondence is carried out to this drive signal as a result and air bubbles in a fluid (ink) can be formed, it is effective. A fluid (ink) is made to breathe out via an opening for discharge by growth of these air bubbles, and contraction, and at least one drop is formed. Since growth contraction of air bubbles will be appropriately performed instancy if this drive signal is made into pulse shape, Discharge of a fluid (ink) excellent in especially a response can be attained, and what is written in a U.S. Pat. No. 4463359 specification and a 4345262 specification is suitable as a more desirable drive signal of this pulse shape. If conditions written in a U.S. Pat. No. 4313124 specification of an invention about a rate of a rise in heat of the above-mentioned thermal action side are adopted, further outstanding record can be performed. A discharge mouth which is indicated by each above-mentioned specification as composition of a recording head, Composition using a U.S. Pat. No. 4558333 specification and a U.S. Pat. No. 4459600 specification which indicate composition arranged to a liquid route and a field to which a thermal action part other than combination composition (a straight line-like liquid flow channel or a right-angled liquid flow channel) of an electric heat conversion object is crooked is also included in the present invention. In addition, a plurality of electric heat conversion objects are received, The present invention is effective also as composition based on the Provisional-Publication-No. 59 No. 138461 gazette per year which indicates composition whose puncturing which absorbs a pressure wave of the Provisional-Publication-No. 59 No. 123670 gazette per year or thermal energy which indicates composition which uses a common slit as a discharge part of an electric heat conversion object is made to correspond to a discharge part. As the recording head of a full line type which has correspondence Did do length to width of the maximum recording medium which can record a recorder, Although any of composition which fills the length with combination of two or more recording heads which are indicated by specification mentioned above, or composition as one recording head formed in one may be sufficient, the present invention can demonstrate an effect mentioned above much more effectively. In addition, the present invention is effective also when electric connection with a main part of a device and supply of ink from a main part of a device use an exchangeable recording head of Timbul type which becomes possible, or a recording head of a cartridge type formed in the recording head itself in one by a main part of a device being equipped. Since an effect of the present invention can be stabilized further, it is preferred to add a recovery means for a recording head established as composition of a recorder of the present invention, a preliminary auxiliary means, etc. A capping means for a recording head if these are mentioned concretely, It is effective in order to perform a cleaning means, pressurization or a suction means, an electric heat conversion object, heating elements different from this or these preheating means that are depended combination 5 2, and record where performing auxiliary discharge appearance mode which performs discharge different from record was also stabilized. Not only record mode of only mainstream colors, such as black, but it is as record mode of a recorder, A recording head is constituted in one or the present invention is very effective also in a device provided with full color at least one by a Recovery color color or mixed colors of a different color even with two or more combination although it was good. In a present invention example described above, although ink is explained as a fluid, even if it is ink which will be in a softening state at room temperature even if it is ink which is a solid-like at room temperature, it can use by the present invention. Because what carries out temperature control is common as temperature adjustment is performed for ink itself by within the limits more than 30 degreeC and below 70 *C and it is in a stable discharge range about the viscosity of ink in an above-mentioned ink jet device, Or [ preventing by Yo, in addition making Temperature rising by thermal energy use it in inoculation as energy of attitude-izing to a liquid state from a solid state of ink, if ink makes the shape of liquid at the time of use record signal grant ], Or it carries out whether ink solidified in the state of neglect for the purpose of prevention from So-called of ink is used, and is as for any, Ink use of character which will not be liquefied without thermal energies, such as what ink liquefies and carries out discharge as the shape of liquid ink by grant according to a record signal of thermal energy, and a thing which it already begins to solidify when reaching a recorded material, is also applicable to the present invention. In such a case, ink is good also as a form which counters to an electric heat conversion object in the state where it was liquefied to a crevice or a penetration hole of a porous sheet which is described in JP,54-56847,A or JP,60-71260,A, or was held as a solid. In the present invention, the most effective thing performs a film boiling method mentioned above to each ink mentioned above. [Effect of the Invention] One or more discharge mouths for carrying out discharge of the ink according to the present invention so that clearly from the above explanation, In the drive method of an ink jet head with which the substrate by which one or more heater elements which make each discharge mouth generate correspondence Do thermal energy are elaborated, and the substrate took, and even With: possesses a To be support plate or a casing, The thermal energy for carrying out discharge of the ink according to an image signal is generated in the above-mentioned heater element, When performing image recording by the ink jet head whose heat resistance which passes the above-mentioned support plate or a casing among the heat resistance between the above-mentioned substrate and the exterior is lower than the heat resistance which does not pass the support plate or casing, When the above-mentioned ink jet head carries out discharge of the ink of maximum volume nuwax, thermal energy generated in the above-mentioned substrate is set to Emax, if thermal energy which generates the discharge volume of the ink according to the above-mentioned image signal in the above-mentioned substrate V and then is set to E -- the time of E!=Emax -- always (E intestines ax-E) -- /(Vmax-V) -- about 1 law -- A -- since it had composition to control so that it might become direct the inside of a substrate -- a temperature detecting means and ?! -- making temperature distribution uniform, while keeping the temperature of a substrate constant with easy composition, without establishing a coarse control means, The drive method of the ink jet head which can perform highly defined and stabilized record without picture nonuniformity is provided.

[Brief Description of the Drawings]

Drawing 1 is a mimetic diagram which illustrates the 1st character pattern and head drive pulse in an example of a drive method of the ink jet head by the present invention, Drawing 2 (a) is a circuit diagram which illustrates the drive circuit used in the 1st example, The timing chart as which Drawing 2 (b) illustrates the actuating signal of the circuit of Drawing 2 (a), The graph as which Drawing 3 illustrates the relation between discharge ink temperature and substrate residual energy, Drawing 4 is a typical perspective view which illustrates a suitable ink-jet recording device to apply the head drive method by the present invention, The graph which shows the measurement result of distribution of OD value of a picture when Drawing 5 applies the 1st example, The timing chart which illustrates the head drive pulse in the 2nd example of the drive method of the ink jet head according [ Drawing 6 ] to the present invention, The circuit diagram which illustrates the drive circuit where Drawing 7 is used in the 2nd example, the flow chart the 8th A indicates the procedure of the 2nd example of operation to be, The flow chart the timing chart in the 3rd example of the drive method of 7 which passes and illustrates a Do drive pulse, the circuit diagram which illustrates the drive circuit where Drawing 10 is used in the 3rd example, and Drawing 11 indicate the procedure of the 3rd example of operation to be to the ink-jet according [ Drawing 9 ] to the present invention, The timing chart which illustrates the head drive pulse in the 4th example of the drive method of the ink jet head according [ Drawing 12 ] to the present invention, Drawing 13 is a mimetic diagram which illustrates the heater element and the cellular generating state of a head which are used in the 4th example, Drawing 14 (a) is a circuit diagram which illustrates the drive circuit used in the 4th example, The timing chart Drawing 14 (b) indicates the actuating signal of the circuit of Drawing 14 (a) to be, The graph which illustrates image concentration distribution when the Off d-chart and Drawing 16 in which Drawing 15 shows the procedure of the 4th example of operation apply the 4th example, The timing chart which illustrates the head drive pulse in the 5th example of the drive method of the ink jet head according [ Drawing 17 (a) ] to the present invention, Drawing 17 (b) is a mimetic diagram which illustrates arrangement of the heater element on the substrate of the head used in the 5th example, Drawing 18 (a) is a circuit diagram which illustrates the drive circuit used in the 5th example, The graph which illustrates one picture distribution when the graph and the 19th A (b) which illustrate image concentration distribution when the timing chart and Drawing 19 (a) where Drawing 18 (b) illustrates the actuating signal of the circuit of Drawing 18 are accepted in the 5th example change the drive condition of the 5th example, The timing chart which illustrates the head drive pulse in the 6th example of the drive method of the ink jet head according [ Drawing 20 (a) ] to the present invention, Drawing 20 (b) is a fragmentary longitudinal cross-section which illustrates the Arrangement room of the heater element of the head used in the 6th example, The circuit diagram which illustrates the drive circuit where Drawing 21 is used in the 6th example, and Drawing 22 are typical exploded perspective views which illustrate the composition of a suitable ink jet head to use it when carrying out the present invention, The graph as which Drawing 23 illustrates the relation between the temperature of the substrate of a head and a support plate and the discharge volume of ink, and Drawing 24 are timing charts which illustrate the temperature change of the substrate after the drive start of a head, and a support plate. The numerals which express the main component part in a drawing below are enumerated. 1-111 -- A character pattern, H9~Hl, heater element for - and discharge, 41 ---- A carriage, 42---5 recorded material, W, width of the electric pulse impressed according to --111- and an image signal, Wi --- the width of the electric pulse impressed without being based on an image signal (or -- responding to the contrary of an image signal), The cycle of the image signal given to tau--- and one heater element, V o p"-"-drive voltage, 1ot [ ..---- One top plate, 106 / .... - and support plate. ] -.... One substrate, 1*2 --- One heater element, 103--- and a discharge mouth, 104 -... - liquid flow channel, 105 The 2nd A figure (a) Drawing 3 Tenv h Ding Drawing 5 80+nm 160mm A Rad scan, a direction Snipe"-1 prefecture Drawing 7 The 8th Figure L CK Drawing 14 (a) Drawing 15 M -" o (J O0 Drawing 18 (a) Supsilon t(s S SD Drawing 21 Spit it. object n (to-'cm') body