Display device

The present invention relates to a display device having a sleep timer function and including an image reproduction unit for reproducing a storage medium (recording medium) and a display unit for displaying the reproduced image.

In recent years, many storage media have been developed in response to various needs, and for example, CDs (Compact Discs) and DVDs (Digital Versatile Discs) are often used as storage media for storing and reproducing moving images having a large amount of data. In particular, a playback device using a DVD capable of playing a feature-length moving image and audio data is rapidly becoming widespread. On the other hand, the image display device of the playback device is a projection type that is composed of a display element having a transmission type or reflection type light modulation action and a discharge type light source that irradiates the display element with light, and projects an image on a screen. Display devices, so-called projectors, are widely known.

In such a playback device, various functions have been proposed in consideration of convenience. For example, a timer means for counting the set sleep timer time, a display means, a dimmer means for changing the brightness of the display means, and a dimmer means for changing the brightness of the display means according to the count value of the timer means. An electronic device having a control means for controlling and having a sleep timer function that makes it easy to check the remaining time of the sleep timer is known (see, for example, Patent Document 1).

Alternatively, there is known a storage medium playback device capable of saving the trouble of searching for a playback start location when resume playback of a storage medium whose playback has been interrupted (see, for example, Patent Document 2).

<patcit num="1"><text>Japanese Unexamined Patent Publication No. 2000-243074</text></patcit><patcit num="2"><text>Japanese Unexamined Patent Publication No. 2003-45122</text></patcit>

<p> A display device that displays a reproduced image is indispensable for a reproduction device that reproduces a storage medium, and an integrated device has begun to be proposed from the viewpoint of convenience. Further, as a display device, an integrated device capable of displaying a large screen is desired.</p><p> Therefore, the present invention aims to improve the convenience of the reproduction operation related to the sleep timer function in the display device in which the image reproduction unit for reproducing the storage medium and the display unit for displaying the reproduced image are integrated. The purpose.</p>

<p> In order to solve the above problem, the display device of the present invention includes a reproduction unit that reproduces an image stored in a storage medium and a display unit that displays an image reproduced by the reproduction unit, and has a set time. A display device having a sleep timer function for stopping the playback operation of the playback unit and the display of the display unit as time elapses, the storage means for storing the stop position information of the storage medium, and the setting of the sleep timer. The reproduction operation of the reproduction unit is stopped with the passage of time, the stop position information of the storage medium that is stopped when the reproduction operation of the reproduction unit is stopped is stored in the storage means, and the reproduction unit corresponds to the stop position information. It is characterized in that the reproduction operation is started from a position that is backed up by a predetermined reproduction operation time from the position where the reproduction operation is performed.</p><p> According to the above, when the set time of the sleep timer has elapsed and the continuous playback of the storage medium whose playback has been stopped is started, the playback operation is performed from the position backed by the predetermined playback operation time from the position corresponding to the stop position information. Is started, so that the story of a movie or the like can be remembered, and the continuation of the movie or the like can be efficiently viewed, for example.</p><p> Further, the display device of the present invention is characterized in that the predetermined reproduction operation time for returning from the stop position is set to a time corresponding to the length of the set time of the sleep timer. According to the above, the longer the sleep timer time setting, the longer the playback operation time for the storage medium to go back is set. Therefore, when the continuous playback of the storage medium that has stopped playback is started, for example, a story such as a movie is recorded. I can remember it without difficulty. Alternatively, the playback may be started from a scene that may have been overlooked and may not have been seen, so that the continuation of the movie or the like can be efficiently viewed.</p><p> Further, the display device of the present invention includes a spatial light modulation element that modulates the light from the light source, and includes a setting means for setting a reproduction operation time for returning from the stop position by an input operation. It is characterized in that the reproduction operation is started from a backtracked position for the time obtained by adding the time set in the means and the predetermined reproduction operation time when the light source reaches a predetermined brightness value.</p><p> According to the above, by considering a predetermined reproduction operation time when the light source reaches a predetermined brightness value, there are few time zones in which the image is not projected when the continuous reproduction of the storage medium which has stopped reproduction is started. It is possible to prevent overlooking scenes that may not be present, and to efficiently watch the continuation of movies and the like.</p><p> Further, the display unit includes a power control unit that controls the power value supplied to the light source, and the power control unit reduces the power value supplied to the light source in response to a decrease in the remaining time of the sleep timer. And.</p><p> According to the above, during playback of the storage medium, the power value of the light source is reduced in response to the decrease in the remaining time of the sleep timer, so that the projected image becomes darker and darker at each stage of the elapsed time. You can know the approximate remaining time of the sleep timer from the displayed image.</p><p> Further, the display unit includes a cooling fan for cooling the light source, and after the set time of the sleep timer elapses, the display unit controls the power supply unit in the order of stopping the playback unit, turning off the light source, and stopping the cooling fan. It is characterized by having a part.</p><p> According to the above, when the reproduction unit is stopped and the light source is turned off, the temperature of the light source or the vicinity of the light source is high, for example, several hundred ° C. Therefore, by continuing to drive the cooling fan, the light source and the vicinity of the light source are generated. It is possible to prevent the life of the light source from being shortened and to prevent various inconveniences caused by high heat.</p><p> Further, when it is detected that the light source of the projection unit is turned off during the reproduction operation of the reproduction unit, the reproduction position information of the storage medium at the time when the light source is turned off is stored in the storage means, and the reproduction unit causes the reproduction unit. The feature is that the reproduction operation of the storage means is started from the position corresponding to the reproduction position information stored in the storage means, from the position where the light source is backed up by a predetermined reproduction operation time when the light source reaches a predetermined brightness value. To do.</p><p> According to the above, the light source was turned off (non-lighted) due to deterioration or damage during the playback operation, and after maintenance (replacement) of the light source, playback was started when the continuous playback of the storage medium stopped playback was started. For example, the story of a movie or the like can be remembered, and the continuation of the movie or the like can be efficiently viewed. In order to cope with turning off due to a power failure, it is desirable to have an auxiliary power supply for performing necessary operations such as storing playback position information.</p>

(First Embodiment) Hereinafter, a first embodiment embodying the present invention will be described with reference to FIGS. 1 to 3. In this embodiment, a projector using a transmissive liquid crystal panel, which is one of the spatial light modulation elements, as a display device will be described as an example. Examples of other spatial light modulators include a reflective liquid crystal panel, DMD (Digital Micromirror Device: a trademark of TI, USA), GLV (Grating Light Valve), and the like.

As an example of the playback unit constituting the projector, a DVD playback device using a DVD (Digital Versatile Disc) of an optical disk as a storage medium is used, and the projector as a display device more specifically irradiates a liquid crystal panel and a liquid crystal panel with light. A projection type liquid crystal display device, which is composed of a light source and projects light modulated by a liquid crystal panel onto a screen to display an image, a so-called liquid crystal projector, will be described.

FIG. 1 is a block diagram showing a schematic configuration of the liquid crystal projector of the present embodiment. In FIG. 1, the liquid crystal projector 1 serves as a playback unit 2 that reproduces a moving image or the like stored in a DVD 7 as a storage medium, and a display unit that projects the moving image reproduced by the playback unit 2 onto a screen 8 or the like. It consists of a projection unit 3, a power supply unit 4, an operation unit 5, and the like.

The reproduction unit 2 is composed of a reproduction operation unit 21, a signal processing unit 22, a reproduction control unit 23, a timer 24, a timer setting unit 25, etc., and the projection unit 3 is a projection control unit 31, an image processing unit 32, and an LCD drive circuit 33. , Liquid crystal panel 34, ballast 35, lamp 36 as a light source, projection lens 37, cooling fan 38, etc.

The power supply unit 4 is composed of a reproduction power supply unit 4a and a projection power supply unit 4b, and is configured so that power supply control (power off control) can be independently controlled. The power switches (not shown) of the playback unit 2 and the projection unit 3 may be configured such that the power switches are independently turned on and off, but in the present embodiment, one power switch is turned on. The playback unit 2 and the projection unit 3 are configured to turn on the power at the same time. The operation unit 5 is provided with, for example, various operation keys (not shown), and various operations in the reproduction unit 2 and the projection unit 3 can be performed by a predetermined operation of each key.

The playback operation unit 21 is a memory reading unit of the DVD7, and is a spindle motor that rotates on which the DVD7 is placed, a laser pickup that detects the memory stored in the DVD7, and a servo control unit that controls the spindle motor and the laser pickup (all of them). (Not shown) etc.

The signal processing unit 22 shapes the analog signal read by the playback operation unit 21 into a digital signal, decodes it according to a predetermined rule (for example, a moving image compression method called MPEG2), and projects the decoded image data. Output to the image processing unit 32 of 3. Further, when the playback operation unit 21 stops playing, the signal processing unit 22 inputs and stores the playback stop position data of the DVD 7 into the memory (RAM) 26 of the playback control unit 23. The memory 26 of the reproduction control unit 23 is a storage means for storing the stop position information of the storage medium (DVD7).

The playback control unit 23 temporarily stores various data when executing a CPU (Central Processing Unit) that executes various processes such as a sleep timer function and a playback return process, a ROM that stores a control program that controls each unit, and processing. It is equipped with RAM (collectively displayed as memory 26) to be stored, and controls the operation of the entire playback unit 2.

The timer 24 is a timer for executing a predetermined sleep timer function and the playback / return operation of the playback operation unit 21, and the sleep timer function or the like is executed based on the setting contents of the key operation of the timer setting unit 25. The timer setting unit 25 is provided with various operation keys and a display for setting the sleep timer time and the playback / return time, and performs operations such as setting the sleep timer time and playback / return time by a predetermined operation of each operation key. .. The details of the timer setting unit 25 will be described later based on FIG.

The projection control unit 31 controls the CPU that executes various processes, the RAM that temporarily stores data when executing various processes, or the RAM that temporarily deploys application programs such as processes, and controls each unit. It has a ROM for storing programs and the like. Various operations in the projection unit 3 are executed based on the control program and various application programs stored in the ROM. The projection control unit 31 and the reproduction control unit 23 are electrically connected via a bus, and input / output of a power supply processing signal or the like is performed with each other.

The image processing unit 32 stores the moving image data input from the signal processing unit 22 in a buffer memory (not shown), and performs frame rate conversion, scaling processing, and image correction such as brightness adjustment, contrast adjustment, and gamma correction processing. Is performed, and such a display video signal is input to the LCD drive circuit 33. The LCD drive circuit 33 supplies the display video signal input from the image processing unit 32 to the liquid crystal panel 34 as final R, G, and B color signals.

The ballast 35 outputs the lamp drive power to the lamp 36 as a light source based on the lamp control signal from the projection control unit 31. The lamp 36 is composed of, for example, a discharge type ultra-high pressure mercury lamp, and is lit and driven based on the lamp driving power input from the ballast 35. The projection control unit 31 is a control unit that controls the power value of the light source. The cooling fan 38 is a cooling fan of the lamp 36, is provided in the vicinity of the lamp 36, is driven from the projection control unit 31 based on the cooling fan control signal, and sends cooling air around the lamp 36 to cool the lamp 36. I do.

Next, the basic operations of the reproduction unit 2 and the projection unit 3 will be described. In the following description, it is assumed that, for example, a commercial AC power source is supplied to the power source unit 4 via the inlet 6, and the power sources of the reproduction unit 2 and the projection unit 3 are in the on state.

First, when the DVD 7 as a storage medium is inserted into the playback operation unit 21 and the playback key provided in the operation unit 5 is turned on, the playback operation unit 21 rotates to read the memory of the DVD 7. The reproduction operation unit 21 outputs the read analog signal to the signal processing unit 22. Then, the signal processing unit 22 shapes the analog signal input from the playback operation unit 21 into a digital signal, decodes it according to a predetermined rule (for example, a moving image compression method called MPEG2), and projects the decoded image data. Output to the image processing unit 32 of unit 3.

The moving image data input to the image processing unit 32 is stored in the buffer memory, and image correction such as frame rate conversion, scaling processing, brightness adjustment, contrast adjustment, and gamma correction processing is performed to display a video signal for display. Input to LCD drive circuit 33. In the LCD drive circuit 33, the display video signal input from the image processing unit 32 is supplied to the liquid crystal panel 34 as the final color signals of R, G, and B, and the liquid crystal panel 34 is driven.

On the other hand, the ballast 35 outputs the lamp drive power for stably continuing the discharge of the lamp 36 to the lamp 36 based on the lamp control signal from the projection control unit 31, and the lamp 36 is lit and driven. Further, the cooling fan 38 is driven based on the cooling fan control signal from the projection control unit 31 and sends cooling air around the lamp 36 to cool the lamp 36.

Then, when the light from the lamp 36 passes through the liquid crystal panel 34, the image is projected onto the screen 8 through the projection lens 37, and the moving image of a movie or the like stored in the DVD 7 can be reproduced and viewed. it can.

FIG. 2 is a schematic explanatory view of the timer setting unit 25. As shown in FIG. 2, the timer setting unit 25 includes operation keys 51 to 54 for performing various timer operations and a display 55. The operation keys include a set key 51 for setting (selecting) the playback / return time, a select key 52 and a set key 53 for setting the sleep timer time, and a start key 54 for starting the sleep timer. The sleep timer function is a function that automatically turns off (turns off) the power after a certain period of time (set time) elapses from the time when the sleep timer is executed (started). The power supply of the projection unit 3 (power supply unit 4) is turned off.

The set key 51 is a key for setting the playback operation time (that is, the playback return time) in which the playback operation unit 21 stops playing and returns from the stopped playback position of the DVD 7 after the sleep timer setting time has elapsed. , By pushing operation, it is possible to repeatedly set (select) preset playback / return times, for example, 10 seconds, 30 seconds, and 1 / 1-step playback / return times. The set playback / return time is held until the set key 51 is operated to reset the set. This set key 51 is a setting means for setting the playback operation time.

The select key 52 and the set key 53 are operation keys for setting the set time of the sleep timer. By pushing the select key 52, the time digit and the minute digit to be set are selected, and the set key 53 is pushed. By doing so, the desired sleep timer time is set. The time of the sleep timer can be set up to 5 hours every 15 minutes, for example. The display 55 displays the playback operation time and the sleep timer set time in response to the operation of each of these operation keys, and displays the remaining time of the sleep timer by starting the sleep timer when the start key 54 is pushed.

Next, the sleep timer operation will be described.

For the sleep timer, the time of the sleep timer is set by operating the select key 52 and the set key 53 of the timer setting unit 25, and the set time is displayed on the display 55. Then, the sleep timer is started by pushing the start key 54. When the start key 54 is pushed, the start signal of the sleep timer is input to the reproduction control unit 23 and the projection control unit 31, and the timer 24 counts the time via the reproduction control unit 23. When the sleep timer is started, the set time displayed on the display 55 is subtracted from the set time in 1-minute units along with the time count of the timer 24, and the time until the end of the operation of the sleep timer is displayed.

Then, when the reproduction control unit 23 recognizes from the signal from the timer 24 that the set time has elapsed from the time when the sleep timer is started, it sends a control signal to the reproduction power supply unit 4a of the power supply unit 4 to supply the power supply of the reproduction unit 2. Is turned off, and the end signal of the sleep timer is output to the projection control unit 31.

On the other hand, in the projection control unit 31 to which the end signal of the sleep timer is input, the projection control unit 31 outputs a lamp control signal for cutting off the power supplied to the lamp 36 to the ballast 35, and the lamp 36 is turned off. Then, after the lamp 36 is turned off and a predetermined time has elapsed, a control signal is sent from the projection control unit 31 to the projection power supply unit 4b, and the power supply of the projection unit 3 is turned off. When the power of the projection unit 3 is turned off, the driving of the cooling fan 38 is also stopped.

In such power supply control, when the lamp 36 is turned off, the temperature around the lamp 36 or the lamp 36 is high, for example, several hundred ° C. Therefore, the cooling fan 38 is continuously driven (rotated) to control the lamp 36 and the lamp 36. The area around the lamp 36 is cooled to prevent the lamp 36 from shortening its life. The predetermined time during which the power of the projection unit 3 is turned off after the lamp 36 is turned off is set to, for example, 3 minutes when the temperature of the lamp 36 drops to a constant temperature.

Next, the playback / return operation will be described. In the playback return operation, the sleep timer is set during playback of DVD7, and after the sleep timer ends, playback of the playback unit 2 is started in order to continue playback of the DVD7 that has stopped playback, or playback of DVD7. When the lamp 36 of the projection unit 3 turns off due to deterioration or damage, and after maintenance (replacement) of the lamp, the playback of the playback unit 2 is started in order to continue the playback of the DVD 7 that has stopped playing. It is done in.

In the playback return operation when the sleep timer is used, after the sleep timer time is set, the start key 54 is pushed to start the sleep timer, and the playback operation unit 21 sets the sleep timer during the playback operation. When the time has elapsed and the time count is completed in the timer 24, the reproduction control unit 23 outputs a reproduction stop signal to the reproduction operation unit 21. The reproduction operation unit 21 stops the reproduction of the DVD 7 being reproduced, and inputs the reproduction stop signal to the signal processing unit 22. Then, the signal processing unit 22 outputs the playback stop position data of the stopped DVD 7 to the playback control unit 23, and the playback control unit 23 stores the input playback stop position information in a predetermined storage area of the memory 26.

After the end of the sleep timer, when the operation of starting (restarting) playback is performed by a predetermined key operation of the operation unit 5, the playback control unit 23 moves the position of the playback stop position data of the DVD 7 stored in the memory 26. Then, the signal that the DVD 7 backs up is input to the playback operation unit 21 for the playback return time (selected time in 3 steps of 10 seconds, 30 seconds, and 1 minute) set by the set key 51. The playback operation unit 21 reverses the DVD 7 for the selected time and starts playback from the backtracked position.

When the lamp 36 is not lit, the playback return operation is not performed while the lamp 36 is lit (during the playback operation of the reproduction unit 2), for example, the quartz glass constituting the lamp 36 is damaged due to thermal strain. When the lamp is turned on, the ballast 35 detects the non-lighting of the lamp 36 from the displacement of the electric power for driving the lamp 36, and the non-lighting signal of the lamp 36 is input to the projection control unit 31.

Then, the non-lighting signal input to the projection control unit 31 is output from the projection control unit 31 to the reproduction control unit 23, and the reproduction stop signal is input from the reproduction control unit 23 to the reproduction operation unit 21. The playback operation unit 21 stops the playback of the DVD 7 being played and outputs the playback stop signal to the signal processing unit 22. Then, the signal processing unit 22 outputs the playback stop position data of the stopped DVD 7 to the playback control unit 23, and the playback control unit 23 stores the input playback stop position information in a predetermined storage area of the memory 26. ..

The memory of the playback stop position of the DVD 7 and the power supply control when the playback / returning operation and the lamp 36 are not lit will be described with reference to the flowchart of FIG.

The process shown in the flowchart of FIG. 3 is executed during playback of DVD7 in a state where the playback return time from the playback stop position of DVD7 is set and the sleep timer is started (projection of the projection unit 3).

First, in step S1, it is determined whether or not the lamp 36 is not lit (off), and if it is not lit, the process proceeds to step S2, and if it is not, the process proceeds to step S3. In step S2, mode 3 is stored in a predetermined storage area of the memory, and then the process proceeds to step S12.

In step S3, it is determined whether or not the sleep timer has ended, and if the sleep timer has not ended, the process returns to step S1, and if the sleep timer has ended, the process proceeds to step S4. In step S4, it is determined whether or not the set playback / return time is 1 minute, and if the set playback / return time is 1 minute, the process proceeds to step S5, and mode 2 is set to the predetermined storage area of the memory. Then move to step S11. If the set playback / return time is not 1 minute, the process proceeds to step S6 to determine whether or not the set playback / return time is 30 seconds.

In step S6, if the set playback / return time is 30 seconds, the process proceeds to step S7, the mode 1 is stored in a predetermined storage area of the memory, and then the process proceeds to step S11. If the set playback return time is not 30 seconds, the process proceeds to step S8. In step S8, mode 1 is stored in a predetermined storage area of the memory, and then the process proceeds to step S11.

Then, in step S11, the reproduction unit 2 is stopped, then in step S12, the lamp 36 is stopped, and then in step S13, the projection unit 3 is stopped. By stopping the projection unit 3 in step S13, the cooling fan 38 is also stopped.

The above steps S1 to 8 are the storage flow of the reproduction stop position executed by the reproduction control unit 23, and steps S11 to 13 are the power supply control flow executed by the reproduction control unit 23 or the projection control unit 31.

Then, when the power of the reproduction unit 2 and the projection unit 3 is turned on and the operation of starting (restarting) the reproduction of the reproduction unit 2 is performed by a predetermined key operation of the operation unit 5, the reproduction control unit 23 stores the memory. The command of the stored playback stop position data of the DVD7 is input to the playback operation unit 21, and the playback operation unit 21 rotates the DVD7 backward from the playback stop position. In the storage flow of the playback stop position, the signal that the DVD7 returns is 5 seconds when mode 3 is stored, 1 minute when mode 2 is stored, 30 seconds when mode 1 is stored, and mode 0. In the case of, the DVD7 is backtracked for 10 seconds, and playback is started from the backtracked position.

When the playback of the playback unit 2 is started after the sleep timer is set and the sleep timer ends, or after the lamp 36 is turned off and the lamp is replaced, the rise time of the lamp 36 (the lamp reaches a predetermined brightness value). It is preferable to consider the time to reach). Therefore, the playback operation time (that is, the playback return time) that returns from the playback stop position of the DVD 7 is the time obtained by adding the playback return time set by the set key 51 and the rise time of the predetermined lamp 36, or the lamp 36. The time obtained by adding the predetermined playback return time when is not lit and the rise time of the predetermined lamp 36 is set as the playback return time, and the DVD 7 can be backtracked by that time and playback can be started from the backtracked position. .. The predetermined rise time of the lamp 36 is set, for example, to reach 80% of the brightness of the lamp 36 during stable irradiation.

According to the present embodiment described above, the following effects can be obtained. (1) When the set time of the sleep timer has elapsed and the continuous playback of the DVD7 that has stopped playing is started, the playback is performed after the DVD7 is played back, so that a story such as a movie can be remembered. Alternatively, it is unlikely that a scene that may not have been seen is overlooked, and for example, a continuation of a movie or the like can be efficiently viewed.

(2) Even when the lamp 36 is not lit (turned off), it is played back after the continuous playback of the DVD7 that has stopped playing is started, so that a story such as a movie can be remembered. Alternatively, it is unlikely that a scene that may not have been seen is overlooked, and for example, a continuation of a movie or the like can be efficiently viewed.

(3) Since the playback operation time (playback time) to go back can be set, by setting the time according to the user's usage environment, for example, the continuation of a movie or the like can be efficiently watched.

(4) When the lamp 36 is turned off, the temperature around the lamp 36 or the lamp 36 is high, for example, several hundred ° C. Therefore, by continuing to drive (rotate) the cooling fan 38, the lamp 36 and the lamp 36 By cooling the surroundings of the lamp 36, it is possible to prevent the life of the lamp 36 from being shortened and to contribute to power saving.

(5) By considering the predetermined playback operation time when the lamp 36 reaches a predetermined brightness value, when the continuous playback of the DVD7 which has stopped playback is started, there is no time zone in which the image is not projected, and it may not be seen. It is possible to prevent overlooking a scene that cannot be seen, and to efficiently watch the continuation of a movie or the like. (Second embodiment)

Another embodiment of the replay / return operation will be described. In the present embodiment, the playback operation time (that is, the playback return time) that goes back is automatically different according to the length of the sleep timer setting time, and the longer the sleep timer setting time is, the longer the playback return time is set. It is an embodiment. The storage flow and power supply control flow of the playback stop position of the DVD 7 will be described with reference to the flowchart of FIG.

The process shown in the flowchart of FIG. 4 is executed during playback of DVD7 in a state where the playback return time from the playback stop position of DVD7 is set and the sleep timer is started (projection of the projection unit 3).

First, in step S21, it is determined whether or not the sleep timer setting time is 3 hours or more, and if it is 3 hours or more, the process proceeds to step S22, and if it is not 3 hours or more, the process proceeds to step S23. In step S22, mode 2 is stored in a predetermined storage area of the memory, and the process proceeds to step S26.

In step S23, it is determined whether or not the sleep timer setting time is within the range of 1 hour to 1 hour and 45 minutes, and if it is within the range of 1 hour to 1 hour and 45 minutes, the process proceeds to step S24 and 1 hour. If it is not within the range of ~ 1 hour and 45 minutes, the process proceeds to step S25. In step S24, mode 1 is stored in a predetermined storage area of the memory, and the process proceeds to step S26.

In step S25, mode 0 is stored in a predetermined storage area of the memory, and the process proceeds to step S26. In step S26, it is determined whether or not the sleep timer time has expired, and if not, the process returns to step S21 again. When the sleep timer time has expired, the process proceeds to step S11. After step S11, the reproduction unit 2 is stopped in step S11, then the lamp 36 is stopped in step S12, and the projection unit 3 is stopped in step S13, as in the first embodiment.

The above steps S21 to 26 are executed by the reproduction control unit 23, and steps S11 to 13 are executed by the reproduction control unit 23 and the projection control unit 31.

Then, when the power of the reproduction unit 2 and the projection unit 3 is turned on and the operation of starting (restarting) the reproduction of the reproduction unit 2 is performed by a predetermined key operation of the operation unit 5, the reproduction control unit 23 stores the memory. The command of the stored playback stop position data of the DVD7 is input to the playback operation unit 21, and the playback operation unit 21 rotates the DVD7 backward from the playback stop position. In the storage flow of the playback stop position, the signal that the DVD7 backs up is the backtracking of the DVD7 by 1 minute when the mode 2 is stored, 30 seconds in the mode 1, and 10 seconds in the mode 0. , Starts playback from the backtracked position.

According to the present embodiment, the longer the sleep timer time setting, the longer the playback operation time for the DVD7 to go back is set. Therefore, when the continuous playback of the DVD7 that has stopped playing is started, for example, a story such as a movie is recorded. I can remember. Alternatively, the playback may be started from a scene that may be overlooked and may not be seen, so that the movie or the like can be efficiently watched. Moreover, since the playback / return time is automatically set, it is possible to obtain a projector that is easy to use. (Third embodiment)

Another embodiment of the sleep timer function will be described. The present embodiment is a sleep timer function that reduces the power value of the lamp 36 that projects light onto the liquid crystal panel 34 in response to the passage of the set time of the sleep timer (that is, the reduction of the remaining time of the sleep timer). The storage flow and power supply control flow of the playback stop position of the DVD 7 will be described with reference to the flowchart of FIG.

The process shown in the flowchart of FIG. 5 is executed during playback of DVD7 (projection of the projection unit 3) in which the playback return time from the playback stop position of DVD7 is set and the sleep timer is started.

First, in step S31, it is determined whether or not the sleep timer time has expired, and if not, the process proceeds to step S32, and if the sleep timer time ends, the process proceeds to step S11.

In step S32, it is determined whether or not the remaining time of the sleep timer is within the range of 45 minutes to 31 minutes, and if it is within the range of 45 minutes to 31 minutes, the process proceeds to step S33, and 45 minutes to 31 minutes. If it is not within the range, the process proceeds to step S34. In step S33, the projection control unit 31 switches the ballast 35 to the lamp control signal of the dimmer 1 and returns to step S31.

In step S34, it is determined whether or not the remaining time of the sleep timer is within the range of 30 minutes to 16 minutes, and if it is within the range of 30 minutes to 16 minutes, the process proceeds to step S35, and 30 minutes to 16 minutes. If it is not within the range, the process proceeds to step S36. In step S35, the projection control unit 31 switches the ballast 35 to the lamp control signal of the dimmer 2 and returns to step S31. In step S36, the projection control unit 31 switches the ballast 35 to the lamp control signal of the dimmer 3 and returns to step S31.

After step S11, the reproduction unit 2 is stopped in step S11, then the lamp 36 is stopped in step S12, and the projection unit 3 is stopped in step S13, as in the first and second embodiments. The above steps S31 to 34 are executed by the reproduction control unit 23, and steps S11 to 13 are executed by the reproduction control unit 23 and the projection control unit 31.

The lamp control signal input to the ballast 35 by the projection control unit 31 is a signal for controlling the amount of power supplied from the ballast 35 to the lamp 36, and the dimmer 1 is supplied with, for example, 80% of the normal power supply amount. However, the dimmer 2 is supplied with 70% of the normal power supply amount, and the dimmer 3 is supplied with 60% of the normal power supply amount.

According to the present embodiment, during playback of the DVD 7 (projection of the projection unit 3), the image projected on the screen 8 with the elapsed time of the sleep timer is projected by gradually darkening at each stage of the elapsed time. You can see the approximate remaining time of the sleep timer from the image (screen 8). Further, when playing back and viewing a moving image such as a movie in a dark environment, it is not necessary to check the remaining time of the sleep timer displayed on the display 55 of the timer setting unit 25.

Other modification examples are described below. (Modification example 1)

Although the case where the timer 24 and the timer setting unit 25 are connected to the reproduction control unit 23 of the reproduction unit 2 to be configured has been described, the case may be connected to the projection control unit 31 of the projection unit 3. Further, although described in the case of being composed of two control units of the reproduction control unit 23 and the projection control unit 31, it may be composed of one control unit. (Modification example 2)

When the liquid crystal projector 1 is integrally configured with a playback unit 2 that reproduces a moving image or the like stored in the DVD 7, and a projection unit 3 that projects the moving image reproduced by the playback unit 2 onto a screen 8 or the like. As described in the above, there may be a case where the playback device and the liquid crystal projector are configured as two bodies, and each device is provided with a predetermined wired or wireless I / F (interface). (Modification example 3)

In the embodiment, the playback return time for returning from the playback stop position of the DVD 7, the remaining time of the sleep timer for reducing the power value of the lamp 36, the set time of the sleep timer corresponding to the playback return time, and the like are determined by the playback unit 2 and the projection. It can be arbitrarily decided in consideration of the performance of Part 3. For example, the playback back time can be set to 5, 10 or 15 minutes. Further, the remaining time of the sleep timer for reducing the power value may be set to 10 minutes or less (dimmer 1), 5 minutes or less (dimmer 2), or 1 minute or less (dimmer 3). (Modification example 4)

It may be a combination of the first embodiment and the third embodiment, and the second embodiment and the third embodiment. (Modification example 5)

In the second embodiment, the backtracking time may be set. For example, set the sleep timer at a rate such as 10%, 5%, or 1% of the set time. (Modification example 6)

The timer setting unit 25 may display the menu screen and project it on the screen 8 to set the sleep timer setting time and the playback operation time (reproduction return time) to be backtracked by the operation of the operation unit 5. (Modification 7)

In each of the above embodiments, the sleep timer setting time, the playback return time, and the remaining time of the sleep timer for reducing the power value are divided into three stages, but the present invention is not limited to this. Any value may be set and input.

<figref num="1">The block diagram which shows the schematic structure of the liquid crystal projector of this embodiment.</figref><figref num="2">Schematic diagram of the timer setting unit.</figref><figref num="3">Flow chart of memory of playback stop position and power supply control in playback return operation.</figref><figref num="4">Flow chart of storage of another playback stop position and power supply control in the playback return operation.</figref><figref num="5">Flow chart of memory and power supply control of another playback stop position in sleep timer function.</figref>

Code description

1 ... LCD projector as a display device, 2 ... playback unit, 3 ... projection unit as a display unit, 4 ... power supply unit, 4a ... playback power supply unit, 4b ... projection power supply Unit, 5 ... Operation unit, 7 ... DVD as storage medium, 21 ... Playback operation unit, 22 ... Signal processing unit, 23 ... Playback control unit, 24 ... Timer, 25 ... timer setting unit, 26 ... memory as storage means, 31 ... projection control unit, 32 ... image processing unit, 33 ... LCD drive circuit, 34 ... liquid crystal panel, 35. .. Ballast, 36 ... Lamp, 38 ... Cooling Fan, 51 ... Set Key, 52 ... Select Key, 53 ... Set Key, 54 ... Start Key, 55 ... Display vessel.