Plasma display panel and its driving method

Plasma display panel and driving method

The crossed to quotation related application is higher than the South Korean claim patented output of the dynasty face of the book priority application program and October 15, 2001 submitted 2001-0063454, and a authority of the application.

technical field

The invention relates to a plasma display panel (plasma display panel, PDP) and driving method, claims a particularly layer of PDP the light power distribution persistent discharge circuit and driving method.

background technology

And flat panel display to the liquid crystal display (Liquid Crystal Display, A), a field a display (Field Emitting Display, FED) and plasma display panel recently is comprises developing. The flat panel display, PDP compared with a higher brightness and light power to the flat panel display and a broader angle of image. Each of the MAINTAINING, and for) is greater than 40 inches large screen replacing is connected with a serial cathoderay tube (Cathode Light Tube, CRT) is screen.

The maintaining is the use of a plasma display text or the image for flat panel display a charging discharge is produced. The range of for arranged according to the size of PDP of the matrix hundreds of thousands to or more than one million and element roots. The maintaining to according to exerting drive voltage of the waveform and said partition (discharge unit) structure, is composed of DC (Direct Current, a DC) and MAINTAINING AC (AC, The) of PDP.

The flow voltage of DC PDP time, an current in the discharging space layer, each of exposure for wherein the electrode of the space. Each of the connecting, wherein the external using having PDP resistor is current limiting. On the handle; the AC PDP condition, each for medium layer and electrode, therefore, current each capacitance and lower end is limited. AC PDP with a longer life comparison DC PDP, each of capable of preventing the electrodes encounter and discharging for wherein a vibration of a layer of the ion.

Digital 1 is the AC PDP partial drawing single-colour.

Shown as a digital 1, 1 and parallel is formed on the first glass substrate are each other and a pair scanning electrode and 2 and protecting film 3 cover with the insulating layer (scanning electrode 4) and supporting electrode (sustainelectrode 5). 6 Is provided with multiple on the second glass substrate and a addressing electrode the insulating layer 7 and 8. 7 Is parallel to the addressing electrode 8 between both insulation to the addressing electrode (an electrode 8) and a bar-shaped film 9 screen. Form a fluorescent layer and insulating layer 7 surface and side film screen 9 and 10. The first glass substrate 1 and second glass substrate 6 face are, middle of the space 11, so as to each other and electrode of are 4 and supporting electrode 5 and addressing electrode 8 overlapping. The scanning electrode 4 and supporting electrode 5 arranged on each other and form a discharge partition with a addressing electrode 8 infalls' discharge 12 spaces.

Digital 2 or a device of PDP electrode.

Shown as a digital 2, PDP electrode structure for m×n matrix. Is specific, addressing electrode A1 to the Am arranged in the direction, and n lines of supporting electrode X1 to Xn and scanning electrode Y1 to Yn is RESPECTIVELY two pattern device is an expert direction of. Discharge district according shown the digital 2 corresponding to the discharging district according shown the digital 1 12.

Generally, for driving the AC method of PDP (initialization), writing (addressing), continue period comprising a reset and cleaning process.

The reset cycle, and the initialization to each district's state, so for addressing to the partition smoothly. The writing side, the partition and closing partition for selecting opening, and (addressing partition) on the dust of a charging in the electrical district. The continuing a cycle, and discharge, so actual display pictures in addressing district. The cleaning a cycle, reduces the partition board charge, so finished continuing the discharging.

The AC PDP, each for connecting the AC PDP connection of the scanning the electrode (WHEREIN the electrode) and supporting electrode (POSITIVE electrodes and) and capacitive load; and scanning electrode and supporting electrodes with capacitance each of the. Order application for continuing discharge waveform, is different from the discharge power non-merit power is assorted. And entrusts for receiving non-merit the power circuit is mounted and a recovery connection the discharge circuit or the energy recycling circuit.

Now to is connected on AC MAINTAINING the persistent discharge circuit and driving method for describe.

Digital 3 and 4 meter tradition to continue the discharge circuit and tradition continue discharge circuit work waveform.

Of L.F.Weber is systems, and 4,866,349 and 5,081,400 bus the persistent discharge circuit of the US patent number of AC PDP according to continue the discharge circuit or the energy recycling circuit. The driving of AC PDP with the circuit, X electrode persistent discharge circuit 10 (11 is not shown) is provided with a same structure with the electrode OF persistent discharge circuit. For conveniently, now to describe X electrode persistent discharge circuit.

The tradition connection the discharge circuit (10) comprises the switch Sa and Sb energy recycling circuit, the diode D1 and D2 and said Lc and energy recycling capacitor Cc and two switch Sc and Sd persistent discharge device.

Panel connected with the electronic connected between two switch Sc and Sd. The plate surface is equivalent capacitor Cp.

With the upper structure tradition to continue discharge circuit of switch Sa to tool of four modes to switch operation of Sd, and shown the digital 4. Net is arranged with an Lc current IL and output voltage Vp waveform according to switch operation of.

The preliminary platform; the panel two ends of a voltage is 0, the layer is connected in the closed switch Sd switching switch Sa. At the time, energy recycling capacitor Cc apparatus to continue discharge voltage Vs 50% Vs/2 voltage is placed on the surcharge, wherein a time to continue the discharging by hand generating flow rapidly.

A panel two ends of the voltage Vp which is a 0 states, point t0 the time, starting mode operation 1, wherein at the time, closed switch Sa, and separating switch Sb, Sc and Sd.

A mode 1 t0 to the t1 working cycle, and CIRCUIT formed by switch Sa and a diode D1 and an Lc and plasma display panel capacitor Cp current path. The invention, and shown the digital 4, flows through an Lc current IL layer, the LC resonance and half-wave, and output voltage Vp increasing slowly, and almost and connection discharge voltage Vs. Integrated in the output voltage Vp connection of the voltage Vs time point, almost without the current is not Lc.

In mode 1:00, mode 2 time, at the time, closed switch Sa and Sc, and separating switch Sb and Sd. A mode 2 t1 to the is working cycle, the outer flow voltage Vs to affect switch is Sc to the capacitive Cp, therefore a panel output voltage Vp. At the time, a t1 performing zeroing voltage switch layer, a switch Sc two ends of the voltage of the ideal is 0 is.

Is a thermal panel output voltage Vp discharge state mode, 2:00 mode 3 time, at the time, closed switch Sb, and separating switch Sa, Sc and Sd.

A mode 3 is connected to the t3 working cycle, and CIRCUIT formed by plasma panel capacitor Cp and an Lc and diode D2 and a switch Sb and energy recycling capacitor Cc current path. The invention, and shown the digital 4, flows through an Lc current IL panel and output voltage reducing Vp. The invention, an Lc current IL panel and output voltage Vp point t3 to communicate 0 to the time.

A mode 4 t3 to the t4 working cycle, closed switch Sb and Sd, and separating switch Sa and Sc. , So the output voltage Vp (0 is. The closed switch Sa under the state, process a which multiple to the sound 1 operation. , So duplicates the operations.

The tradition connection of the discharge circuit, and a result of the actual of the parasitic element to an parasitic resistor, a capacitor panel and electric conductance resistance of the parasitic resistor and a switch; the flow switch performing zeroing voltage switch is impossible. Therefore, the closed switch, a switching consumption display improving. Is further, continue the discharge circuit according to the tradition, wherein a panel capacitance increasing end of the ideal is continue the voltage Vs, storing the inductor Lc the magnetic energy 0 is. Thus, wherein a panel capacitance by the actual of the parasitic element is with a increased continue the voltage Vs, and a exist for increasing a panel capacitor end voltage voltage source. The invention, is the actual switch Sc performing zeroing voltage switch is impossible. , So the closed switch, a switching consumption display improving.

, Wherein the connection tradition the discharge circuit, and starting to each, energy recycling capacitor Cc of the bus of charging voltage Vs/2. The energy recycling capacitor with a high-voltage of the voltage Vs/2 state, wherein a time to continue of the pulse, which can produce very large flow rapidly. , Therefore of additionally comprises a protecting circuit of current-limiting wherein the rapidly.

invention content

According to the invention, claims a device for driving the plasma display panel device and method, although the actual circuit has the parasitic element, a bottom end of the zeroing voltage switch.

, Wherein according to the invention, claims a device for driving the MAINTAINING device and method, wherein an to continue of the operation, and process flow rapidly.

According to the invention, wherein the handle, claims a device for driving the plasma display panel device, PDP comprises multiple scanning electrode and supporting electrode of each other doublings, and scanning electrode and supporting electrodes a panel capacitor. The device connection the discharging unit comprises a, comprising a series between the first voltage and second voltage first and second switch; and first contacts of the second switch is connected with a panel capacitance end; and in series between the first voltage and second voltage and third fourth switch, a and contacts of fourth switch connected other end of the capacitor. Connection the discharging unit holding panel capacitor end voltage for wherein the first voltage or the second voltage. The device further - comprising a charging and discharging device, comprising a series between the first voltage and second voltage first and second capacitors, and connected with the first and contacts and panel of capacitor end second capacitors first inductor. The first charging and discharging unit charges with a panel capacitance end of the first voltage, or is provided with a panel capacitance end of the second voltage. The device further - comprising a second charging and discharging device, comprising a series between the first voltage and second voltage and a capacitor, and third and contacts and panel of capacitance and a capacitor and a. The second charging and discharging unit charges with other end of the capacitance the first voltage, or is at the other end of the panel capacitor the second voltage.

The first charging and discharging unit further - comprising a switch, and a current path between panel with capacities is a switch first inductor. The second charging and discharging unit is comprising to switch, and a current path between panel with capacities is a switch and an.

According to the invention; the other, a claims a device for driving the MAINTAINING method. Closes and second fourth switch is released, which is a panel capacitor two ends of the voltage the first voltage. Closing paralleling the switch, and a spacing the second switch, so improving a panel capacitor end voltage to the second voltage. Is a panel capacitor end for improving voltage to the second voltage closing paralleling first switch, so on a panel capacitor two ends of the voltage for the first voltage and second voltage. Loop the first switch, so reducing a panel capacitor end voltage to the second voltage. Is a panel capacitor end voltage reducing to the second voltage closing paralleling second switch is released, which is a panel capacitive voltage end of the second voltage.

According to the invention; the other, a claims a MAINTAINING, at least one panel comprises multiple addressing electrodes and a addressing electrodes overlapping, and each other multiple scanning electrode and supporting of electrodes and. The scanning the electrode and supporting electrodes with the panel capacitor. The controller receives the external video signal, and production addressing driving control signal and connection the discharging signal. Addressing driving a controller and addressing driving control signal, and transmits is used for selecting to be display discharge partition display and application the addressing electrode. And connected connection the driver to continue the discharging signal from the controller, and a continue of the voltage entry staggered to the scanning electrode and supporting electrode, so end of the selected of the partition persistent discharge.

And connected connection the driver to continue the discharging unit comprises a, comprising a series between the first voltage and second voltage first and second switch and connected with a panel capacitor end contacts, and in series between the first voltage and second voltage and third fourth switch and connected with the panel capacitor other end contacts. Connection the discharging unit holding panel capacitor end voltage for wherein the first voltage or the second voltage. The first charging and discharging device in series between the first voltage and second voltage first and second capacitors, and connected with the first and contacts and panel of capacitor end second capacitors first inductor. The first charging and discharging unit charges with a panel capacitance end of the first voltage, or is provided with a panel capacitance end of the second voltage. The second charging and discharging device in series between the first voltage and second voltage and a capacitor, and third and contacts and panel of capacitor other end and a capacitor and a. The second charging and discharging unit charges with other end of the capacitance the first voltage, or is at the other end of the panel capacitor the second voltage.

Brief for describing the drawings

Digital 1 is the AC plasma display panel (AC PDP) partial drawing single-colour; Digital 2 or a device of PDP electrode; Digital 3 and 4 meter is connected on the connected to continue the discharge circuit and transmission system and continue discharge circuit work waveform; Digital 5 or the root according to the invention embodiment, PDPDigital 6 or the root according to the invention embodiment persistent discharge circuit; Digital 7 or shown the digital 6 to continue discharge circuit a waveform;

Axes to act according to the invention embodiment chart to four 8D and an operation mode.

Detailed composed of illustrated embodiments

Digital 5 or to act according to the invention embodiment plasma display panel.

Shown as a digital 5, 200 module, and connection - comprising a plasma panel 100, addressing drivers according to the invention claims a example's PDP 300 and 400 controller.

A plasma panel 100) comprise a multiple addressing electrode A1 for the direction is arranged at Am, and is an expert direction is RESPECTIVELY two pattern of multiple scanning electrode Y1 and supporting electrode X1 to Yn to Xn.

Addressing driving 200 a controller 400 and addressing driving control signal, and transmits is used for selecting to be display discharge partition display and application each addressing electrode.

And connected connection the driver 300 to continue the discharging signal from the controller 400 cover, and a continue the pulse voltage entry staggered to the scanning electrode and supporting electrode, so end of the selected of the partition persistent discharge.

The controller 400 receiving external video signal, an addressing driving control signal and connection the discharging signal, and connection the discharging signal application the addressing driving the addressing driving control signal and 200 and connected connection the driver 300.

And connection the driver 300 comprises a persistent discharge circuit according to the scanning of the present invention claims a shown as a digital 6, 320 and entrusts for receiving the reactive power for recovery.

Shown as a digital 6, 320 comprises a continue the discharging unit 322, THE electrode charging and discharging device according to the invention claims a example's persistent discharge circuit and 324 X electrode charging and discharging 326 unit.

Connection the discharging 322 unit comprises connected to continue discharge voltage Vs are or voltage four transistor S1, S2, S3 and S4, and with an individual diode. The capacitance two ends of the voltage Vy and Vx with a switch operations of four transistors to continue discharge voltage Vs or the voltage.

THE electrode charging and discharging unit comprises 324 connected between the continuing discharge voltage Vs and a capacitor C1 and C2 and one end of the voltage is a capacitor C1 and C2 contacts inductor (L2, and connected with the inductor (L2 other end and capacitance THE electric violent in connected with Ya and Yb. Each in connected with Ya and Yb with an individual diode. The connected with Ya and Yb is formed by the transistor, the power supply cathode of the anode or other. THE electrode charging and discharging unit 324 to continue of the voltage Vs counter plate capacitance THE power is placed on the charging diode, or for discharge of the base voltage counter plate capacitance THE electrode region.

POSITIVE electrode charging and discharging unit comprises 326 connected between the continuing discharge voltage Vs and a capacitor C3 and C4 and one end of the voltage is capacitor C3 and C4 contacts a L1, and is an L1 other end and capacitance POSITIVE power violent in connected with Xa and Xb. Each in connected with Xa and Xb with a diode body. The connected with Xa and Xb is formed by the transistor, the power supply cathode of the anode or other. POSITIVE electrode charging and discharging unit 326 to continue of the voltage Vs counter plate capacitance POSITIVE power is placed on the charging diode, or for discharge of the base voltage counter plate capacitance X electrode region.

THE electrode charging and discharging unit 324 and POSITIVE electrode charging and discharging 326 unit connected with the converter is a reset cycle, a cycle addressing and cleaning of inner end, and a at the middle of the capacitor C1, C2, (and C4 voltage.

Now a polysilicon type digital 7 and chart to four 8D to acting according to the invention embodiment for driving the MAINTAINING both method.

A reset cycle, addressing cycle and cleaning cycle, the separating connected with released, a charges capacitor C1, C2, (and C4 voltage.

The continuing a cycle, inverted connected with the time works with four operator schemata, now is reverse driving to describe. According to embodiment of the present invention, wherein the continuing of bus closed switch Yb and Xb.

1)The first mode (t0 to t1), wherein t is the inversed t0, the inductor (L2 induced current with horizontal value IL2pk, closed switch S2 and S4, and two ends of the voltage Vy and Vx are 0 is. Closed switch S2 and Ya of the first mode released, and a capacitor C2 and a L2 and a switch Ya and a switch Yb panel and a capacitor Cp and a switch S4 resonance current path. Therefore, the capacitor THE voltage electrode Vy panel and two ends of the voltage difference Vp=Vy-Vx increasing. The first mode, dust application WHEREIN the electrode (to achieve electrode) is an L2 to a capacitor C2 in the charge, and POSITIVE electrodes (support electrode) and a grounding. The embodiment of the present invention, a capacitor C1 and C2 and is greater than the capacitive Cp. Therefore, the lower first), a capacitor C1 and C2 two ends of the voltage Vc1 and Vc2 fluctuation of ignore. An adjusting is equal to t1, a voltage of capacitor THE electrode charges to continue discharge voltage Vs, panel two ends of the voltage charges to continue discharge voltage Vs, and finished the first mode. According to the embodiment of the present invention, the first pattern period of short. The invention, and shown the digital 7, wherein the panel strip charges current source IL2 horizontal value IL2pk almost.

2)The second mode operational amplifier to t2), an adjusting is equal to t1, a voltage Vy and a connection of the voltage Vs is closed, switch S1 body diode. At the time, and each shown the digital 7 to switch the voltage between the drain electrode and source is a 0 states closed switch S1, and a result of switch S1 performing zeroing voltage switch, therefore without the closed switching consumption of switch S1. According to embodiment of the present invention, each of improving the ideal is arranged on the voltage of the capacitance THE electrodes continuing of the voltage Vs time point, a memory and inductor (L2 having enough energy, therefore with the circuit of the parasitic the actual condition, the voltage of the capacitance THE electrode the energy the inductor (L2 improving by a memory continue the voltage Vs. The second mode, continue discharge voltage Vs application WHEREIN the electrode, and POSITIVE electrode earths. The invention, layer wall is charge's of the partition of plasma panel 100 discharge, selecting function for starting to continue the discharging, namely display discharge.

The second mode layer, the voltage of the capacitance THE electrode (to continue discharge voltage Vs, and voltage of the capacitance X electrode keeps is a grounding, therefore panel capacitor two ends of the voltage keeping to continue discharge voltage Vs. Therefore, the light panel. The second mode, to digital 7 and 8B meter, flows through a capacitor C1 and a switch S1 and a L2 current reducing. An adjusting is equal, t2 flows through an L2 current IL2 almost To become-IL2pk, and separating switch S1. Therefore, the finished second mode.

3)The third mode (t2 to t3) is a third), a spacing switch S1, so the switch S4 panel and a capacitor Cp and a switch Yb and a switch Ya and a L2 and a capacitor C2 in resonant. Therefore, the capacitor THE electrode voltage reducing Vy. Touch panel, two ends of the voltage reducing Vp. The third mode, resides the process to continue the discharging WHEREIN the electrode plate is charge and discharge of space in a capacitor C2. An adjusting is equal to t3 panel, two ends of the voltage difference Vp and 0, finished and third mode. The third mode side of the whole switching period is shorter much. A current IL2 change of ignores.

4)The fourth mode (t3 to t4), wherein t equal to t3, wherein the voltage of the capacitance THE electrode and is 0 situations, closed switch S2 body diode. At the time, wherein source and a switch S2 the voltage between the drain electrode is a 0 states closed switch S2, without the closed switching consumption. An adjusting is equal to t4, wherein IL1 and IL1pk, and a separating switch S2 is finished, the fourth mode, and starting and a cycle operation.

And the upper, according to embodiment of the present invention, an, wherein with a circuit parasitic element, a voltage of the capacitance THE electrode or X electrode can enhance the inductor (L2 or a L1 energy with the memory continue the voltage Vs. Therefore, the closed S1 or S3, capable of the zeroing voltage switch.

Moreover, a embodiment of the present invention, and is used for recovering power capacitor C1 and C2 and voltage and capacitors C3 and C4 apparatus on the Vs/2 is unnecessary; And with inverted connected with the reset cycle, addressing cycle and cleaning of capacitor C1 and C2 and a capacitor C3 and C4 voltage is a. The invention, wherein preventing the starting to continue of the pulse generating flow rapidly is a.

Although the invention is a combination of switching and is the actual a both time, and understand of the invention is a voice the embodiment according publicizes, further - comprising a based upon, are separated from a wherein the mental and range of revisions and equal device of a condition.

And the upper; according to the invention, although with the circuit of the parasitic element kettle is placed on the zeroing voltage switch; and separation to continue of the operation generating flow rapidly is a.