JP4997996B2 - Projector and projector control method - Google Patents

Description

The present invention relates to a projector and a projector control method .

2. Description of the Related Art Conventionally, a reproduction apparatus integrated projector that reproduces a recording medium such as a DVD (Digital Versatile Disc) or the like and forms an optical image according to image information output from the reproduction apparatus and projects the enlarged image is known. (For example, refer to Patent Document 1).
In the projector described in Patent Document 1, a predetermined guide image is projected when the reproduction by the reproduction apparatus is stopped. Since this guide image is projected with a predetermined luminance, the room can be illuminated.

Japanese Patent Laid-Open No. 2005-94475

  However, in the projector described in Patent Document 1, the brightness of the guide image is determined in advance, and the projector is projected with a predetermined brightness that can illuminate the room. When you stop, you may feel uncomfortable feeling that the room suddenly becomes brighter.

An object of the present invention is to provide a projector that can comfortably illuminate a room when a user pauses reproduction by a reproduction apparatus , and a projector control method .

The projector of the present invention includes a light source, a light modulation device that modulates light emitted from the light source according to image information to form an optical image, and a projection that displays an image by enlarging and projecting the formed optical image. a projector comprising an optical device, comprising a control means to control the projector, the control unit includes a state detection unit for detecting the state of pause or return of the display image based on the image information, wherein When a pause of the display image is detected by the state detection unit, a switching image display unit that switches from the display image to display a predetermined switching image, and a return of the display image is detected by the state detection unit Occasionally, a display image restoration unit that displays returns the displayed image, and a luminance change control unit for changing the luminance of the switching image, the luminance change control unit, the switching image display unit When the switch image is displayed, the luminance of the switching image, and changing the average luminance of all pixels in the display image displayed immediately before displaying the switching image.
In the projector according to the aspect of the invention, the projector includes an operation unit that outputs an operation signal that causes the control unit to execute a predetermined operation. The control unit is configured to output the switching image based on the operation signal output from the operation unit. It is preferable to provide a switching image luminance setting unit for setting luminance.

  According to such a configuration, the switching image display unit displays a predetermined switching image by switching from the display image when the state detection unit detects a pause of the display image. In other words, in the projector with integrated playback device, when a pause in playback by the playback device is detected, the projector switches from the display image based on the image information output from the playback device to display a predetermined switching image. The display image restoration unit restores and displays the display image when the state detection unit detects the restoration of the display image. That is, in the projector with integrated playback apparatus, when the return of playback by the playback apparatus is detected, the display image is returned and displayed. Here, since the switching image brightness setting unit sets the brightness of the switching image based on the operation signal output from the operation means, the projector user sets the brightness of the switching image by operating the operation means. can do. Therefore, for example, the user can comfortably set the brightness of the switching image to the same level as the brightness of the display image without feeling uncomfortable feeling that the room suddenly becomes brighter or darker. The interior can be illuminated.

In the present invention, the control means, based on the operation signal output from the operation means, the time required for switching from the display image to the switching image in the switching image display section, and the switching image in the display image restoration section. A change time setting unit that sets at least one of the time required to return to the display image , wherein the luminance change control unit switches from the display image to the switch image by the switch image display unit; and the display image return when at least one of the return from the switching image to the display image by the part, stepwise based on the the time-varying set by the change time setting portion, or continuously changing the brightness of the switching image and Turkey Is preferred.

  According to such a configuration, the change time setting unit determines the time required for switching from the display image to the switching image based on the operation signal output from the operation means (hereinafter referred to as switching change time), and the switching image. Since the time required for returning to the display image (hereinafter referred to as return change time) is set, the projector user can set the switching change time and the return change time by operating the operation means. . The brightness change control unit changes the brightness of the switching image stepwise or continuously based on each change time set by the change time setting unit, so that the user can switch between the change times. The user can get used to the brightness of the image, and can comfortably illuminate the room without feeling uncomfortable when the room becomes brighter or darker.

In the present invention, the luminance change control unit may employ control of a modulation state of the light modulation device.
According to such a configuration, the luminance change control unit controls the amount of light that is enlarged and projected from the projection optical device by changing the image information of the switching image and controlling the modulation state of the light modulation device. The brightness of the switching image can be changed. In addition, since a program for changing the image information of the switching image may be added to the control means, the projector of the present invention can be realized only by changing the software for a normal projector.

In the present invention, the luminance change control unit may employ control of the light amount of the light source.
According to such a configuration, the luminance change control unit can change the luminance of the switching image by controlling the light amount of the light source, thereby controlling the light amount of the light that is enlarged and projected from the projection optical device. Further, since the image information of the switching image is not changed unlike the case of controlling the modulation state of the light modulation device described above, it is possible to reduce the calculation load on the control means.

In the present invention, the projector may include a light amount adjusting unit that adjusts a light amount of light emitted from the light source, and the luminance change control unit may control the light amount adjusting unit.
According to such a configuration, the luminance change control unit can change the luminance of the switching image by controlling the light amount adjusting unit to control the light amount of the light that is enlarged and projected from the projection optical device. In addition, for example, by providing a light amount adjusting means with high speed response such as a mechanical type, the brightness changes at a higher speed than when controlling the modulation state of the light modulation device or controlling the light amount of the light source. Can be made.

In the present invention, it is preferable that the control unit includes a switching image display color setting unit that sets a display color of the switching image based on an operation signal output from the operation unit.
According to such a configuration, since the switching image display color setting unit sets the display color of the switching image based on the operation signal output from the operation unit, the projector user operates the operation unit. The display color of the switching image can be set. Therefore, the user can set the indoor illumination color according to his / her preference.

In the present invention, the state detection unit may be configured to detect a temporary stop or return state of the display image by monitoring the image information.
According to such a configuration, even when a separate playback device is connected externally as well as the playback device integrated projector, the display image is temporarily stopped based on the image information output from the separate playback device. The return state can be detected. Therefore, even when a separate playback device is externally connected, it is possible to switch from the display image to the switching image in the switching image display unit and to return from the switching image to the display image in the display image restoration unit.

In the present invention, the operation means outputs a display image operation signal that causes the display image to be paused or restored, and the state detection unit monitors the display image operation signal to monitor the display image. Detecting a pause or return state can be employed.
According to such a configuration, the state detection unit can detect the state of pause or return of the display image by monitoring the display image operation signal. The configuration of the part can be simplified.
The projector control method according to the present invention includes a light source, a light modulation device that modulates light emitted from the light source according to image information to form an optical image, and an enlarged image of the formed optical image to project an image. A projector control method comprising: a projection optical device for displaying; and a control unit, wherein the control unit detects a pause or return state of a display image based on the image information, and the display A switching image display step for switching from the display image to display a predetermined switching image when a pause of the image is detected, and a display for returning and displaying the display image when the return of the display image is detected An image restoration step, wherein the switching image display step displays the brightness of the switching image immediately before displaying the switching image when the switching image is displayed. And wherein the changing the average luminance of all pixels in the image.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is an external view of the projector 1.
As shown in FIG. 1, the projector 1 modulates light emitted from a light source according to image information to form an optical image, and enlarges and projects the formed optical image on a screen 2 to display the image. And a device main body 3 and a remote controller (remote controller) 4 for remotely operating the device main body 3. Further, the projector 1 is integrated with a DVD reproducing means 32 for reproducing a DVD on the back of the apparatus main body 3, and forms an optical image by modulating in accordance with image information output from the DVD reproducing means 32. It is a DVD integrated projector for enlarging and projecting an optical image.

  The remote controller 4 as an operation means includes a menu key for setting the apparatus main body 3 and the like, and a plurality of operation keys such as playback, stop, and pause of the DVD playback means 32, and the user presses the operation key. Then, an operation signal corresponding to the pressed operation key is transmitted to the apparatus main body 3 by infrared rays. The remote controller 4 transmits the operation signal using infrared rays, but may be configured to transmit the operation signal using radio waves.

FIG. 2 is a functional block diagram of the projector 1.
As shown in FIG. 2, the apparatus main body 3 is operated based on an operation signal transmitted from the remote controller 4, and includes an operation signal detecting means 31, a DVD reproducing means 32, an image processing means 33, and a drive. The control means 34, the image projection means 36, and the control means 38 are provided.
The operation signal detection means 31 is a means for detecting the operation of the remote controller 4 by the user. The operation signal detection means 31 detects an operation signal transmitted by the remote control 4 and converts it into a signal that can be read by the DVD playback means 32 or the control means 38. Output.
In the following description, a signal corresponding to an operation key for causing the DVD playback means 32 to execute a predetermined operation such as playback, stop, and pause is particularly referred to as a DVD operation signal (display image operation signal). To do.
The DVD playback means 32 includes a decoder, and performs a decoding process on an image source read from a DVD in which video (image source) and audio are recorded as digital data, in accordance with the recording method, for example, MPEG2, etc. Image data (image information) is generated and output to the image processing means 33. In addition, the DVD playback unit 32 executes predetermined operations such as playback, stop, and pause according to the DVD operation signal output from the operation signal detection unit 31.

The image processing unit 33 performs image correction processing on the image data input by the DVD reproducing unit 32, generates image signals corresponding to each color light of RGB based on the image data subjected to the image correction processing, and performs drive control. It outputs to the means 34.
Image correction processing includes, for example, trapezoidal correction (shape conversion) for correcting trapezoidal distortion caused by the positional relationship between the projector and the screen, γ correction that is color correction according to the output characteristics of the projector, and VT-γ. Correction, color unevenness correction that corrects brightness unevenness and color unevenness due to the characteristics of the liquid crystal panel, and color unevenness (ghost and crosstalk) caused by the drive signal affecting neighboring pixels when driving each pixel of the liquid crystal panel Examples include ghost correction and crosstalk correction for correcting the above.

  The drive control means 34 drives the image projection means 36 based on the image signal output from the image processing means 33 or the control signal output from the control means 38, and is a light modulation device that drives the light modulation device. A drive unit 341 and a light source drive unit 342 for driving the light source are provided.

As shown in FIGS. 2 and 3, the image projection unit 36 includes a light source unit 361. Light emitted from the light source lamp (light source) 362 is converted into parallel light by a reflector 363, and two lens arrays 364A are obtained. , 364B to color separation optical system 365.
The color separation optical system 365 includes a dichroic mirror 366 that reflects red light and transmits blue light and green light, and a dichroic mirror 367 that reflects green light and transmits blue light, and transmits the red light and green light. Separate into light and blue light.

  The red light is reflected by the reflection mirror 365A, the green light is reflected by the dichroic mirror 367, and the blue light is guided to the relay optical system 368 having the two reflection mirrors 369 and 370, and the red light of the electro-optical device 371 is obtained. The liquid crystal panel (light modulation device) 372 for green light, the liquid crystal panel for green light (light modulation device) 373 and the liquid crystal panel for blue light (light modulation device) 374 are respectively incident. Each color light undergoes predetermined modulation according to the image signal output from the image processing means 33 in each of the liquid crystal panels 372 to 374, and is synthesized by the prism 375. The combined light is emitted from a projection optical system (projection optical device) 376 and enlarged and projected onto the screen 2 to display an image.

  The control means 38 controls the apparatus main body 3, and as shown in FIG. 2, an image information monitoring unit 381, a switching image display unit 382, a display image restoration unit 383, and a switching image luminance setting unit 384. A change time setting unit 385, a switching image display color setting unit 386, and a light modulation device control unit 387.

  The image information monitoring unit 381 serving as a state detection unit is in a pause or return state of an image (hereinafter referred to as a display image) displayed on the screen 2 based on the image data output from the DVD playback means 32, that is, The state of playback pause or return by the DVD playback means 32 is detected by monitoring the difference between frames of the image data input to the image processing means 33. That is, when there is no difference between a certain number of frames in the image data input to the image processing means 33, that is, when the image data is the same between a certain number of frames, the reproduction by the DVD reproducing means 32 is paused. Detect as. In the image data input to the image processing means 33, when there is a difference between a certain number of frames, that is, when the image data changes between a certain number of frames, the reproduction by the DVD reproducing means 32 is restored. Detect as.

The switching image display unit 382 displays a predetermined switching image by switching from the display image when the image information monitoring unit 381 detects a pause in the display image, that is, a pause in reproduction by the DVD playback means 32.
The display image restoration unit 383 restores and displays the display image when the image information monitoring unit 381 detects the restoration of the display image, that is, the restoration of the reproduction by the DVD reproducing unit 32.

The switching image luminance setting unit 384 sets the luminance of the switching image based on the operation signal output from the remote controller 4.
The change time setting unit 385 sets the switching change time and the return change time based on the operation signal output from the remote controller 4. In the present embodiment, the switching change time and the return change time are set to the same time.
The switching image display color setting unit 386 sets the display color of the switching image based on the operation signal output from the remote controller 4.

  The light modulation device control unit 387 serving as a luminance change control unit performs light modulation at the time of switching from a display image to a switching image by the switching image display unit 382 and returning from the switching image to the display image by the display image restoration unit 383. By controlling the liquid crystal panels 372 to 374 via the device driving unit 341, the luminance of the switching image is continuously changed based on the change time set by the change time setting unit 385.

Next, setting of the luminance, change time, and display color of the switching image will be described with reference to FIGS. 4 and 5.
When the user of the projector 1 presses the switching image setting menu key of the remote controller 4, the remote controller 4 transmits an operation signal corresponding to the switching image setting menu key to the apparatus body 3 by infrared rays. The operation signal detection unit 31 detects an operation signal transmitted from the remote controller 4 and transmits a control signal to the control unit 38. When the control means 38 receives the control signal output from the operation signal detection means 31, the control means 38 executes the switching image setting processes ST1 to ST5 as shown in FIG.

The control means 38 first displays a switching image setting menu (ST1).
As shown in FIG. 5, the switching image setting menu M includes a luminance setting scroll bar SB1, a change time setting scroll bar SB2, a display color setting scroll bar SB3, an OK button B1, and a cancel button B2 from the top of the menu screen.
The brightness setting scroll bar SB1 changes the brightness signal Y of the switching image, and the state where the brightness signal Y is minimized is 0% and the state where it is maximized is 100%.
The change time setting scroll bar SB2 changes the change time of the switching image, and the change time is set to 0 to 100 seconds.

The display color setting scroll bar SB3 includes a blue color difference setting scroll bar SB31 and a red color difference setting scroll bar SB32.
The blue-difference setting scroll bar SB31 changes the blue-difference signal Cb of the switching image, and 50% is no signal and the blue-difference signal Cb is minimized 0% and the maximized state is 100%. .
The red-difference setting scroll bar SB32 changes the red-difference signal Cr of the switching image. The red-difference signal Cr is set to 0% when the red-difference signal Cr is minimized with 100% as the non-signal, and 100% as the maximum. .
The OK button B1 and the cancel button B2 are used to determine whether to set the luminance, the change time, and the display color that are changed by the setting scroll bars SB1 to SB3.

The cursors of the setting scroll bars SB1 to SB3 are moved by operating the remote controller 4. The OK button B1 and the cancel button B2 are pressed by operating the remote controller 4.
That is, the user of the projector 1 can move the cursors of the setting scroll bars SB1 to SB3 by operating the remote controller 4, and can change the brightness, change time, and display color of the switching image. . The user of the projector 1 can press the OK button B1 or the cancel button B2 by operating the remote controller 4, and the brightness and change time of the switching image changed by the setting scroll bars SB1 to SB3. And whether to set the display color.

When the OK button B1 is pressed, the control means 38 executes ST3 to ST5 by the switching image luminance setting unit 384, the change time setting unit 385, and the switching image display color setting unit 386 as shown in FIG. Then, the switching image setting menu M is closed (ST2).
The switching image luminance setting unit 384 stores the luminance set by SB1 in a storage unit (not shown) (ST3).
Next, the change time setting unit 385 stores the change time set by SB2 in a storage unit (not shown) (ST4).
Then, the switching image display color setting unit 386 stores the display color set by SB3 in a storage unit (not shown) (ST5).

On the other hand, when the cancel button B2 is pressed, the control unit 38 does not store the brightness, change time, and display color set by the setting scroll bars SB1 to SB3 in the storage unit and displays the switching image setting menu M. Close (ST2).
As described above, the control unit 38 sets the luminance, change time, and display color of the switching image.

  The control unit 38 generates image data of the switching image based on the luminance set by the switching image luminance setting unit 384 and the display color set by the switching image display color setting unit 386, and stores it in a storage unit (not shown). Remember. In the present embodiment, the image data of the switching image is a pattern formed from uniform luminance and display color, and RGB color specification is based on the luminance signal Y, the blue difference signal Cb, and the red difference signal Cr. System image data is generated. When the switching image is displayed, the image data of the switching image generated by the control unit 38 is input to the image processing unit 33 and displayed on the screen 2 in the same manner as the display image.

Next, the operation of the projector 1 will be described with reference to the flowchart of FIG.
First, it is assumed that reproduction is performed by the DVD reproduction means 32 and a display image is displayed (ST11).
The image information monitoring unit 381 monitors the difference between the frames of the image data input to the image processing means 33, and detects the pause of the display image, that is, the pause of the playback by the DVD playback means 32 (ST12).
When the image information monitoring unit 381 detects that the display image is paused, the switching image display unit 382 displays the switching image (ST13). At this time, the control means 38 calculates the average luminance of all the pixels in the display image displayed immediately before displaying the switching image, and stores it in the storage means (not shown). In addition, the light modulation device control unit 387 controls the liquid crystal panels 372 to 374 via the light modulation device driving unit 341 to continuously switch images based on the change time set by the change time setting unit 385. Change the brightness.

Here, a change in luminance of the switching image by the light modulation device control unit 387 will be described with reference to FIGS. 7 and 8.
In the present embodiment, in the switching image setting menu M, it is assumed that the blue difference setting scroll bar SB31 and the red difference setting scroll bar SB32 are set to be fixed to 50% each having no signal. A case where the person sets the luminance signal Y and the change time will be described.

  For example, in the switching image setting menu M, when the luminance is set to 100% and the change time is set to 0 second, as shown in FIG. 7A, the light modulation device control unit 387 sets the luminance of the switching image. To 100%. Therefore, since a switching image having a high luminance with respect to the luminance of the display image is displayed, the user may feel uncomfortable feeling that becomes brighter rapidly. On the other hand, for example, in the switching image setting menu M, when the luminance is set to 70% and the change time is set to 0 second, as shown in FIG. The brightness of the switching image is changed to 70%. Therefore, since the switching image having the same luminance as the luminance of the display image is displayed, the user can comfortably illuminate the room without feeling uncomfortable feeling that the room is suddenly brightened.

  Further, for example, in the switching image setting menu M, when the luminance is set to 70% and the change time is set to 10 seconds, as shown in FIG. The brightness of the switching image is changed to 0%. Then, the light modulation device control unit 387 gradually changes the luminance of the switching image so that the luminance of the switching image reaches 70% of the set value in 10 seconds. In the case where the change time is set, for example, as shown in FIG. 8B, even when the luminance is set to 100%, the user can You can get used to the brightness of the switching image. Therefore, it is possible to reduce the user's discomfort and to obtain sufficient brightness for indoor lighting.

  For example, as illustrated in FIG. 8C, the light modulation device control unit 387 first changes the luminance of the switching image to the average luminance stored in the storage unit in ST13. Then, the light modulation device control unit 387 may gradually change the luminance of the switching image so that the luminance of the switching image reaches 70% of the set value in 10 seconds. In this way, the room is not temporarily dark as in the case where the brightness of the switching image is changed to 0%, so that the user can illuminate the room more comfortably.

Next, as shown in FIG. 6, the image information monitoring unit 381 monitors the difference between the frames of the image data input to the image processing unit 33, and restores the display image, that is, the reproduction by the DVD reproducing unit 32. A return is detected (ST14).
When the return of the display image is detected by the image information monitoring unit 381, the light modulation device control unit 387 controls the liquid crystal panels 372 to 374 via the light modulation device driving unit 341, thereby changing the change time setting unit 385. The luminance of the switching image is continuously changed based on the change time set by. Then, the display image restoration unit 383 displays the display image (ST15).

Here, a change in luminance of the switching image by the light modulation device control unit 387 will be described with reference to FIG. Note that FIG. 9A is a diagram subsequent to FIG. 7B, and FIG. 9B is a diagram subsequent to FIG. 8C.
For example, when the change time is set to 0 second in the switching image setting menu M, the display image restoration unit 383 displays the display image as shown in FIG. 9A. Since the change time is set to 0 seconds, the light modulation device control unit 387 does not change the luminance of the switching image.

  Further, for example, in the switching image setting menu M, when the change time is set to 10 seconds, the light modulation device control unit 387 performs the brightness of the switching image in 10 seconds as shown in FIG. 9B. Gradually changes the luminance of the switching image so as to reach the average luminance stored in the storage means in the set value ST13. Then, the display image restoration unit 383 displays the display image.

The projector 1 according to the present embodiment has the following effects.
(1) Since the user of the projector 1 can set the brightness of the switching image by operating the remote controller 4, for example, the brightness of the switching image is set to the same level as the brightness of the display image. By setting, it is possible to illuminate the room comfortably without feeling uncomfortable feeling that the room becomes brighter or darker.

(2) The user of the projector 1 can set the switching change time and the return change time by operating the remote controller 4. The light modulator control unit 387 continuously changes the luminance of the switching image based on each change time set by the user, so that the user can adjust the luminance of the switching image while the change time elapses. It is possible to get used to it and to comfortably illuminate the room without feeling uncomfortable that the room suddenly becomes brighter or darker.

(3) The light modulation device control unit 387 can change the luminance of the switching image by changing the image data of the switching image and controlling the modulation state of each of the liquid crystal panels 372 to 374. Further, since a program for changing the image data of the switching image may be added to the control means 38, the projector 1 of the present invention can be realized only by changing the software for a normal projector.
(4) The user of the projector 1 can set the display color of the switching image by operating the remote controller 4. Therefore, the user can set the indoor illumination color according to his / her preference.

(5) The image information monitoring unit 381 can detect the pause or return state of the display image by monitoring the difference between the frames of the image data input to the image processing unit 33. Even when a separate playback device different from the DVD playback means 32 is externally connected via an image cable or the like, the state of pause or return of the display image based on the image data output from this playback device is detected. be able to. Therefore, even when a separate playback device is externally connected, the switching image display unit 382 can switch from the display image to the switching image, and the display image restoration unit 383 can return from the switching image to the display image. it can.

[Second Embodiment]
A projector 1A according to a second embodiment of the invention will be described.
In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
In the projector 1 according to the first embodiment, the light modulation device control unit 387 is employed as the luminance change control unit.
On the other hand, the projector 1A according to the present embodiment is different in that a light source control unit 388 is employed as a luminance change control unit as shown in FIG.

  The light source control unit 388 switches the light source lamp 362 via the light source driving unit 342 when switching from the display image to the switching image by the switching image display unit 382 and when returning from the switching image to the display image by the display image restoration unit. By controlling, the luminance of the switching image is continuously changed based on the change time set by the change time setting unit 385.

In this embodiment as well, the same actions and effects as (1), (2), and (4) of the first embodiment can be obtained, and the following actions and effects can be obtained. .
That is, since the image data of the switching image is not changed, the calculation load on the control unit 38 can be reduced.

[Third Embodiment]
A projector 1B according to a third embodiment of the invention will be described.
In the projector 1 according to the first embodiment, the light modulation device control unit 387 is employed as the luminance change control unit.
On the other hand, in the projector 1B according to the present embodiment, as shown in FIG. 11, the image projecting unit 36 includes a light amount adjusting unit 377, and as shown in FIG. The difference is that a control unit 389 is employed. Further, the drive control unit 34 is different in that it includes a light amount adjusting unit driving unit 343 that drives the light amount adjusting unit 377.

As shown in FIG. 11, the light amount adjusting means 377 is disposed between the optical paths of the two lens arrays 364A and 364B, and reduces the light by blocking the optical path of the light passing through the two lens arrays 364A and 364B. And includes a pair of light shielding plates 378A and 378B and a rotation mechanism 379.
One end of each of the pair of light shielding plates 378A and 378B is pivotally supported, and is opposed to each other with an optical path of light passing through the two lens arrays 364A and 364B when opened.
The rotation mechanism 379 includes rotation shafts 379A and 379B that pivotally support the light shielding plates 378A and 378B, and a stepping motor (not shown) connected to the rotation shafts 379A and 379B via a transmission mechanism such as a gear.

  The light shielding plates 378A and 378B are rotated in the directions of arrows A and B in FIG. 11 by a stepping motor (not shown) connected to the rotation shafts 379A and 379B. That is, when the light shielding plates 378A and 378B are rotated substantially parallel to the two lens arrays 364A and 364B, the light emitted from the light source unit 361 is attenuated by the light shielding plates 378A and 378B, and the switching image setting is performed. In the menu M, the brightness is set to 0%. On the other hand, when the light shielding plates 378A and 378B are rotated substantially perpendicular to the two lens arrays 364A and 364B, the light emitted from the light source unit 361 is not dimmed by the light shielding plates 378A and 378B. In the switching image setting menu M, the brightness is set to 100%.

  As shown in FIG. 12, the light amount adjusting means control unit 389 adjusts the light amount when switching from the display image to the switching image by the switching image display unit 382 and returning from the switching image to the display image by the display image restoration unit. By controlling the light amount adjusting unit 377 via the unit driving unit 343, the luminance of the switching image is continuously changed based on the change time set by the change time setting unit 385.

In this embodiment as well, the same actions and effects as (1), (2), and (4) of the first embodiment can be obtained, and the following actions and effects can be obtained. .
That is, by providing the light amount adjusting means 377 with high speed responsiveness including the light shielding plates 378A and 378B and a stepping motor (not shown), the luminance is changed at a higher speed than the luminance change control unit in each of the embodiments. be able to.
[Fourth Embodiment]
A projector 1C according to a fourth embodiment of the invention will be described.
In the projector 1 according to the first embodiment, the image information monitoring unit 381 is employed as the state detection unit.
On the other hand, the projector 1C according to the present embodiment is different in that a DVD operation signal monitoring unit 390 is employed as a state detection unit as shown in FIG.

  The DVD operation signal monitoring unit 390 detects the pause or return state of the display image by monitoring the DVD operation signal output by the operation signal detection unit 31. That is, when the operation signal detection unit 31 outputs a DVD operation signal related to the suspension of the DVD reproduction unit 32, the reproduction pause by the DVD reproduction unit 32 is detected. Further, when the operation signal detection means 31 outputs a DVD operation signal related to the reproduction of the DVD reproduction means 32, the return of reproduction by the DVD reproduction means 32 is detected.

In this embodiment as well, the same operations and effects as in the first embodiment can be obtained, and the following operations and effects can be achieved.
That is, since the DVD operation signal monitoring unit 390 can detect the pause or return state of the display image by monitoring the DVD operation signal, the configuration of the state detection unit can be simplified.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in each of the embodiments described above, the DVD reproducing means 32 is built in the apparatus main body 3, but it may be externally connected by an image cable or the like. In short, it is only necessary to output image information to the projector 1. .
In each of the above embodiments, the DVD playback means 32 is a DVD playback device that plays back a DVD. However, the DVD playback device 32 may be an HDD (Hard Disk Drive) playback device or the like, and in short, outputs image information. I just need it.

  In the first to third embodiments, the display image is temporarily stopped or restored by monitoring the difference between frames of image data input to the image processing means 33. . In the fourth embodiment, the display image is temporarily stopped or restored by monitoring the DVD operation signal. On the other hand, for example, the display image pause or return state may be detected by receiving a predetermined control signal from the DVD playback means 32. In short, the display image pause or return state is detected. What is necessary is just to be able to detect.

In each of the embodiments, the remote controller 4 is used as the operation means. However, the operation panel of the apparatus main body 3 may be used. In short, it is sufficient that the projector user can operate and output an operation signal. .
In each embodiment, the luminance change control unit continuously changes the luminance of the switching image. However, the luminance of the switching image may be changed step by step.
In each of the above embodiments, the switching change time and the return change time are set to the same time, but may be different from each other.

In each of the above embodiments, the brightness and display color are set by the YCbCr color system. However, for example, the brightness and display color may be set by the RGB color system. It is sufficient if the color can be set.
In each of the above embodiments, the light emitted from the light source unit 361 is modulated by the liquid crystal panels 372 to 374. For example, a DMD (Digital Micromirror Device), a reflective liquid crystal panel (LCOS: Liquid Crystal on) is used. (Silicon) may modulate the light emitted from the light source.

1 is an external view of a projector according to a first embodiment of the present invention. It is a functional block diagram of the projector. It is a figure which shows the structure of the image projection means of the projector. It is a flowchart which shows the switching image setting process of the projector. It is a figure which shows the switching image setting menu of the projector. It is a flowchart which shows operation | movement of the projector. 6 is a graph showing a change in luminance of a switching image when DVD playback is paused in the projector. It is a graph which shows the change of the brightness | luminance of the switching image at the time of setting change time in the projector. It is a graph which shows the change of the brightness | luminance of the switching image when reproduction | regeneration of DVD is started in the projector. It is a functional block diagram of the projector in 2nd Embodiment of this invention. It is a figure which shows the structure of the image projection means of the projector in 3rd Embodiment of this invention. It is a functional block diagram of the projector. It is a functional block diagram of the projector in 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,1A, 1B, 1C ... projector, 3 ... apparatus main body, 4 ... remote control, 38 ... control means, 362 ... light source lamp, 372 ... liquid crystal panel for red light, 373 ... liquid crystal panel for green light, 374 ... for blue light Liquid crystal panel, 377... Light amount adjusting means, 381... Image information monitoring unit, 382... Switched image display unit, 383... Displayed image restoration unit, 384. Color setting unit, 387, light modulation device control unit, 388, light source control unit, 389, light amount adjusting means control unit, 390, DVD operation signal monitoring unit.

Claims (10)

A light source, a light modulation device that modulates light emitted from the light source according to image information to form an optical image, and a projection optical device that enlarges and projects the formed optical image to display an image A projector,
A control means to control the projector,
The control means includes
A state detection unit for detecting a state of pause or return of the display image based on the image information;
A switching image display unit that switches from the display image and displays a predetermined switching image when a pause of the display image is detected by the state detection unit;
A display image return unit that returns and displays the display image when the state detection unit detects the return of the display image;
A luminance change control unit for changing the luminance of the switching image ,
The brightness change control unit
When the switching image is displayed on the switching image display unit, the luminance of the switching image is changed to an average luminance of all pixels in the display image displayed immediately before displaying the switching image. Projector. The projector according to claim 1, wherein
An operation means for outputting an operation signal for causing the control means to perform a predetermined operation;
The control means includes
A projector comprising: a switching image luminance setting unit that sets the luminance of the switching image based on an operation signal output from the operation means. The projector according to claim 2 ,
The control means includes
Based on the operation signal output from the operation means, the time required for switching from the display image to the switching image in the switching image display unit and the time required for returning from the switching image to the display image in the display image return unit A change time setting unit for setting at least one of them is provided,
The brightness change control unit
The change time set by the change time setting unit at least one of switching from the display image to the switch image by the switch image display unit and returning from the switch image to the display image by the display image return unit projector, wherein the benzalkonium the brightness is changed stepwise or continuously switching image, based on the. The projector according to claim 3 , wherein
The brightness change control unit controls a modulation state of the light modulation device. The projector according to claim 3 , wherein
The brightness change control unit controls a light amount of the light source. The projector according to claim 3 , wherein
The projector includes a light amount adjustment unit that adjusts the amount of light emitted from the light source,
The brightness change control unit controls the light amount adjusting unit. The projector according to any one of claims 2 to 6 ,
The control means includes
A projector comprising: a switching image display color setting unit that sets a display color of the switching image based on an operation signal output from the operation means. The projector according to any one of claims 1 to 7 ,
The projector is characterized in that the state detection unit detects a state of pause or return of the display image by monitoring the image information. The projector according to any one of claims 2 to 7 ,
The operation means outputs a display image operation signal for executing a pause or return of the display image,
The projector is characterized in that the state detector detects a state of pause or return of the display image by monitoring the display image operation signal. A light source, a light modulation device that modulates light emitted from the light source according to image information to form an optical image, a projection optical device that enlarges and projects the formed optical image and displays an image, and control means And a projector control method comprising:
The control means is
A state detection step of detecting a state of pause or return of the display image based on the image information;
A switching image display step of switching from the display image and displaying a predetermined switching image when detecting a pause of the display image;
When detecting the return of the display image, a display image return step for returning and displaying the display image is performed,
The switching image display step includes
When the switching image is displayed, the brightness of the switching image is changed to the average brightness of all the pixels in the display image displayed immediately before displaying the switching image.

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