JP2012099965A - Display controller, shutter glasses, display, control program, computer readable recording medium, control method of display controller, display device, and stereoscopic video appreciation system - Google Patents

Display controller, shutter glasses, display, control program, computer readable recording medium, control method of display controller, display device, and stereoscopic video appreciation system Download PDF

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JP2012099965A
JP2012099965A JP2010244568A JP2010244568A JP2012099965A JP 2012099965 A JP2012099965 A JP 2012099965A JP 2010244568 A JP2010244568 A JP 2010244568A JP 2010244568 A JP2010244568 A JP 2010244568A JP 2012099965 A JP2012099965 A JP 2012099965A
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Prior art keywords
display
eye
video
light
liquid crystal
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JP2010244568A
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Japanese (ja)
Inventor
Takashi Arimoto
Tetsuya Hayashi
Noboru Iwata
Takeshi Mori
Shinyuki Naka
Toshihiko Sakai
Hideharu Tajima
峻之 中
昇 岩田
孝 有本
林  哲也
豪 森
秀春 田島
敏彦 酒井
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Sharp Corp
シャープ株式会社
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Priority to JP2010244568A priority Critical patent/JP2012099965A/en
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Abstract

PROBLEM TO BE SOLVED: To provide a display controller, shutter glasses, a display, a control program, a computer readable recording medium, a control method of a display controller, a display device, and a stereoscopic video appreciation system, capable of suppressing health damage while watching a stereoscopic video.SOLUTION: A display controller 1, which displays a parallax video on a display 2 utilizing a parallax of right and left eye of an appreciator and allows an appreciator to appreciate a stereoscopic video through liquid crystal shutter glasses 3 to switch between visible and invisible state for right and left eye, comprises a presentation control unit 12 to present synchronous state identification information recognizable only to either of eyes of the appreciator to allow the appreciator to distinguish a synchronous state between a display timing of a parallax video, in which either a left-eye video to enable the appreciator to view through the left eye or a right-eye video to enable the appreciator to view through the right eye is displayed on the display 2, and a switch timing between visible and invisible state of the liquid crystal shutter glasses 3.

Description

  The present invention relates to a display control device and the like for viewing and listening to a three-dimensional (3D) video.

  In recent years, research on methods for viewing 3D video other than 2D (2D) video has been actively conducted. To view 3D video, for example, display the left-eye video and the right-eye video dedicated to the 3D video separately, and display two videos with deflection glasses, shutter glasses, etc. It is necessary to visualize with.

  In the case of shutter glasses, it is necessary to control the opening and closing of the right-eye shutter and the left-eye shutter of the glasses in accordance with the output timing of the right-eye video and the left-eye video that are alternately output from the display device. For example, when the shutter glasses receive a right-eye image, control is performed so that the right-eye shutter is opened and the left-eye image is closed while the right-eye image is being received. This makes it possible to view the right-eye video only with the right eye and the left-eye video only with the left eye, and the viewer can obtain the stereoscopic effect intended by the producer of the 3D video.

  In such shutter glasses, an example of a technique for synchronizing each image with each shutter is disclosed in Patent Document 1.

  In the shutter glasses system of Patent Document 1, a first color image as a left-eye image and a second color image as a right-eye image are alternately displayed on a display, and a first color that passes through a left-eye shutter by a color sensor. Either the light quantity of the image or the light quantity that passes through the right-eye shutter is detected. Then, the time point when the shutter is opened and the opening period are slid to detect the time point and period when the light amount detected by the color sensor takes the maximum value.

  Thereby, in the technique of Patent Document 1, the shutter opening / closing timing can be automatically adjusted so that the viewer can correctly recognize the stereoscopic view.

JP 2009-230071 (released on Oct. 8, 2009)

  However, in the technique of Patent Document 1, when the viewer watches the content, the synchronization shift is caused between the timing at which the left-eye video and the right-eye video are displayed on the display device and the shutter opening / closing timing of the shutter glasses. It was difficult to recognize. This is because the technique disclosed in Patent Document 1 needs to adjust the shutter opening / closing timing using a first color video and a second color video different from the 3D video as the content.

  That is, in the technique of Patent Document 1, for example, it is assumed that the viewer adjusts the content before viewing the content, and the above-described synchronization shift occurs due to some cause (for example, shutter glasses failure) during viewing. In addition, the viewer continues to view the content without recognizing the synchronization error. According to the 3D guidelines, when this synchronization shift occurs, the video looks double, or the left-eye video and the right-eye video are reversed, and the viewer feels uncomfortable with the content, The possibility of causing fatigue increases. The above "inversion" refers to a phenomenon in which the left-eye image is viewed with the right eye, for example, when the right-eye shutter is opened at the time of output of the left-eye image. There may be a case where a direct change (such as double appearance) does not appear in the content video itself, and it is difficult for the viewer to recognize the state.

  In the technique of Patent Document 1, even if a device included in the system, such as shutter glasses or a display, fails, the shutter opening / closing timing is not adjusted when viewing the content. It was difficult.

  The present invention has been made to solve the above-described problems, and its purpose is to provide a display control device, shutter glasses, a display, a control program, and a computer reading capable of suppressing health damage during stereoscopic video viewing. An object of the present invention is to provide a possible recording medium, a display control device control method, a display device, and a stereoscopic video viewing system.

  In order to solve the above-described problem, the display control apparatus according to the present invention displays a parallax image using the parallax of the left and right eyes of the viewer on the display, and via a visual switching mechanism that switches between right and left eye viewing approval / disapproval. A display control device for allowing a viewer to view a stereoscopic image, the first parallax image for allowing the viewer to view through one eye, and the viewer to view through the other eye, which is the parallax image. Information for identifying a synchronization state between a display timing at which one of the second parallax images for display on the display is displayed and a switching timing of the visual recognition rejection of the visual switching mechanism, and one of the viewers It is characterized by comprising presentation control means for presenting synchronization state identification information recognizable by eyes.

  Further, in order to solve the above-described problem, the display control device control method according to the present invention displays a parallax image using the parallax of the left and right eyes of the viewer on the display, and switches between right and left eye viewing approval / disapproval. A display control apparatus control method for allowing a viewer to view a stereoscopic image via a visual switching mechanism, the first parallax image for the viewer to visually recognize through one eye, which is the parallax image, and the viewing Information for identifying a synchronization state between a display timing at which one of the second parallax images for allowing the person to visually recognize through the other eye and the switching timing of the visual authorization rejection of the visual switching mechanism, and It includes a presentation control step for presenting synchronization state identification information recognizable by one of the viewers' eyes.

  According to the above configuration, the presentation control means (presentation control step) causes the viewer to present synchronization state identification information that identifies the synchronization state (synchronous / asynchronous) between the display timing and the switching timing. Therefore, the viewer can confirm the synchronization state between the display timing of the parallax image on the display and the switching timing of the approval / disapproval of viewing permission by the visual switching mechanism by confirming the presented synchronization state identification information. Can be confirmed inside. That is, the viewer can confirm whether or not the parallax image displayed on the display can be viewed at the timing to be viewed, and when the display timing and the switching timing are out of sync (synchronization occurs). In the case of ()).

  Therefore, according to the display control device and the control method thereof according to the present invention, the viewer can check the synchronization error, thereby causing a failure of a device (for example, a display or a visual switching mechanism) related to the viewing of the stereoscopic video. Can be taken so as not to suffer from the health damage due to the out of sync, such as stopping viewing of the stereoscopic image or trying to repair the malfunctioning device. For this reason, there is an effect that it is possible to suppress the health damage caused by the above-described synchronization shift during the viewing of the stereoscopic video.

  Here, the presentation of the synchronization state identification information is performed in synchronization with the display timing of the first or second parallax image. For this reason, in order to confirm the synchronization state between the display timing and the opening / closing timing, it is necessary to confirm the synchronization state identification information (confirm the above-mentioned synchronization deviation) with either eye. That is, if the synchronization status identification information can be confirmed with both eyes, the viewer may not be able to determine which synchronization status identification information should be confirmed with which eye.

  For this reason, when the viewer confirms the synchronization error, for example, the viewer can close one of the eyes so that the viewer can confirm the synchronization state identification information only with one of the eyes, The visual switching mechanism needs to perform control for creating the situation. The control in the visual switching mechanism means that the shutter function for switching the visual approval / disapproval of any one eye is maintained in a closed state when the visual approval / disapproval is switched by the shutter function, for example.

  However, according to the display control device and the control method thereof of the present invention, the presentation control means (presentation control step) presents synchronization state identification information that can be recognized by any one of the viewers' eyes. For this reason, since the viewer himself / herself or the visual switching mechanism does not perform the operation or control for closing one of the eyes as described above, the synchronization state identification information can be confirmed with either one of the eyes. It is possible to confirm whether or not the above-described synchronization shift has occurred. That is, it is possible to improve convenience when the viewer confirms the above-described synchronization error.

  As described above, according to the display control device and the control method thereof of the present invention, it is necessary to control the above-mentioned synchronization shift during viewing of a stereoscopic image by the viewer's trouble or the visual switching mechanism for saving the trouble. The effect is that the viewer can confirm without doing so. Thereby, when a synchronization shift occurs during the viewing of a stereoscopic video, there is an effect that health damage due to the synchronization shift can be suppressed.

  In the display control device according to the present invention, the visual switching mechanism includes a first parallax video display shutter and a second parallax video display shutter for viewing the parallax video in each of the left and right eyes of the viewer. The difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to light in a specific polarization state is recognizable to the viewer. It is preferable that the presentation control unit presents the synchronization state identification information by controlling whether or not the emitted light is emitted by the light emitting unit that emits the light having the specific polarization state as the emitted light.

  According to the above configuration, the presentation control unit controls whether or not the emitted light emitted from the light emitting unit is emitted when the synchronization state identification information is presented. Thereby, the viewer can confirm the synchronization state based on the synchronization state identification information based on the light emission state from the light emitting means.

  The presentation control unit causes the light emitting unit to emit light having a specific polarization state as outgoing light. The difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to the emitted light can be recognized by the viewer. For this reason, the viewer recognizes the difference in the transmission state so that the emitted light in a specific polarization state is transmitted through either the first parallax video display shutter or the second parallax video display shutter. Can be recognized. That is, the synchronization state identification information as the emitted light can be confirmed with one eye and not confirmed with the other eye.

  Thereby, the viewer can confirm whether or not the above-described synchronization shift has occurred without performing the operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  In the display control device according to the present invention, the visual switching mechanism includes a first parallax video display shutter and a second parallax video display shutter for viewing the parallax video in each of the left and right eyes of the viewer. The viewer can recognize the difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to the light having specific optical characteristics. The presentation control means preferably presents the synchronization state identification information by controlling whether or not the emitted light is emitted by the light emitting means for emitting the light having the specific optical characteristic as the emitted light.

  According to the above configuration, the presentation control unit controls whether or not the emitted light emitted from the light emitting unit is emitted when the synchronization state identification information is presented. Thereby, the viewer can confirm the synchronization state based on the synchronization state identification information based on the light emission state from the light emitting means.

  The presentation control unit causes the light emitting unit to emit light having specific optical characteristics as emitted light. The difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to the emitted light can be recognized by the viewer. Therefore, the viewer recognizes the difference in the transmission state, so that the emitted light having specific optical characteristics is transmitted through either the first parallax video display shutter or the second parallax video display shutter. Can be recognized as. That is, the synchronization state identification information as the emitted light can be confirmed with one eye and not confirmed with the other eye.

  Thereby, the viewer can confirm whether or not the above-described synchronization shift has occurred without performing the operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  The display control apparatus according to the present invention further includes video output control means for displaying the parallax video on the display, and the presentation control means causes the video output control means to display the first parallax video on the display. The second parallax image can be recognized by the other eye while the second parallax image is recognized, or while the second parallax image is displayed on the display. It is preferable to present the synchronization state identification information so that it can be recognized by the one eye that visually recognizes one parallax image.

  According to the above configuration, when the display timing and the switching timing are synchronized, the synchronized state is established by one eye that should visually recognize the first parallax image or the other eye that should visually recognize the second parallax image. The identification information is not confirmed, and the synchronization status identification information is confirmed when a synchronization loss occurs.

  Therefore, the viewer can confirm the synchronization shift without disturbing the viewing while viewing the stereoscopic video.

  The shutter glasses according to the present invention are shutter glasses as the visual switching mechanism used together with the display control device described above, wherein the first parallax video display shutter includes a first polarizing plate, Preferably, the second parallax image display shutter has a second polarizing plate, and the transmittance of the first polarizing plate with respect to the emitted light is higher than the transmittance of the second polarizing plate with respect to the emitted light. .

  According to the above configuration, since the transmittance of the first polarizing plate with respect to the emitted light is higher than the transmittance of the second polarizing plate with respect to the emitted light, the viewer uses the emitted light as the synchronization state identification information as the first polarized light. It can be recognized as having passed through the first parallax video display shutter having a plate. That is, the synchronization state identification information is confirmed by the eye viewing the parallax image through the first parallax image display shutter, and confirmed by the eye viewing the parallax image through the second parallax image display shutter. You can avoid it.

  Thereby, the viewer can confirm whether or not the above-described synchronization shift has occurred without performing the operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  The shutter glasses according to the present invention are shutter glasses as the visual switching mechanism used together with the display control device described above, wherein the first parallax video display shutter has a first optical filter, Preferably, the second parallax image display shutter has a second optical filter, and the transmittance of the first optical filter with respect to the emitted light is higher than the transmittance of the second optical filter with respect to the emitted light. .

  According to the above configuration, since the transmittance of the first optical filter for the emitted light is higher than the transmittance of the second optical filter for the emitted light, the viewer uses the emitted light as the synchronization state identification information as the first optical filter. It can be recognized as having passed through a first parallax video display shutter having a filter. That is, the synchronization state identification information is confirmed by the eye viewing the parallax image through the first parallax image display shutter, and confirmed by the eye viewing the parallax image through the second parallax image display shutter. You can avoid it.

  Thereby, the viewer can confirm whether or not the above-described synchronization shift has occurred without performing the operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  Further, a display according to the present invention is the display used together with the display control device described above, and is a light having a polarization state different from the polarization state of the emitted light emitted by the light emitting means, and the first It is preferable that the parallax image is displayed by emitting light that passes through both the 1-parallax image display shutter and the second parallax image-display shutter to an extent that can be recognized by the viewer.

  As described above, the first parallax video display shutter and the second parallax video display shutter can confirm the synchronization state identification information as the emitted light emitted from the light emitting means with one eye (that is, the other parallax image display shutter). It cannot be confirmed with the eyes).

  According to the above configuration, the viewer can recognize the parallax image with light having a polarization state different from the polarization state of the emitted light and both the first parallax image display shutter and the second parallax image display shutter. It is emitted as light that transmits to a certain extent. Therefore, even if the first parallax video display shutter and the second parallax video display shutter are configured so that the synchronization state identification information cannot be confirmed by either eye as described above, The first parallax video can be viewed through the first parallax video display shutter, and the second parallax video can be viewed through the second parallax video display shutter.

  Thereby, even if the visual switching mechanism provided with the first and second parallax video display shutters of the present invention is used, it is possible to provide the stereoscopic effect intended by the producer of the stereoscopic video.

  Furthermore, a control program for operating the display control apparatus described above, the control program for causing a computer to function as each of the above-described means, and a computer-readable recording medium on which the control program is recorded are also provided by the present invention. Included in the technical scope.

  According to the control program, the display control device can be realized on the computer by realizing the means described above with the computer. Further, according to the recording medium, the control program read from the recording medium can be realized on a general-purpose computer.

  A display device according to the present invention includes the display control device described above, and the display on which the display control device displays the parallax image. A display device according to the present invention includes the display control device described above and the display described above.

  According to the said structure, the display apparatus with the effect of said display control apparatus is realizable.

  A stereoscopic video viewing system according to the present invention includes the display control device described above and the shutter glasses described above.

  According to the above configuration, it is possible to realize a stereoscopic video viewing system that achieves the effects of the display control device and the shutter glasses.

  As described above, the display control device according to the present invention is the first parallax image for the viewer to visually recognize through one eye, and the viewer for the viewer to visually recognize through the other eye. Information that identifies the synchronization state between the display timing at which any of the second parallax images is displayed on the display and the switching timing of the visual recognition rejection of the visual switching mechanism, and by either one of the viewers' eyes It is a structure provided with the presentation control means to which the synchronous status identification information which can be recognized is shown.

  In addition, as described above, the control method of the display control device according to the present invention is the first parallax image for allowing the viewer to visually recognize the parallax image through one eye, and the other eye to the viewer. Information that allows the viewer to identify the synchronization state between the display timing at which one of the second parallax images to be viewed through the display is displayed on the display and the switching timing of the visual recognition rejection of the visual switching mechanism, and This is a method including a presentation control step of presenting synchronization state identification information recognizable by one of the viewers' eyes.

  Therefore, the display control device and the control method thereof according to the present invention do not require the above-described synchronization shift during the viewing of the stereoscopic video without the need for the viewer's trouble or the control by the visual switching mechanism for saving the trouble. There is an effect that the viewer can confirm. Thereby, when a synchronization shift occurs during the viewing of a stereoscopic video, there is an effect that health damage due to the synchronization shift can be suppressed.

It is a block diagram which shows an example of a principal part structure of the display control apparatus which concerns on one Embodiment of this invention. 1 is a schematic configuration diagram of a 3D video viewing system including a display control device according to an embodiment of the present invention. It is a block diagram which shows an example of the principal part structure of the display which concerns on one Embodiment of this invention. It is a figure which shows schematic structure when the light emission part with which the display control apparatus which concerns on one Embodiment of this invention is arrange | positioned in a display. It is a flowchart which shows an example of the process in the display control apparatus which concerns on one Embodiment of this invention. It is a block diagram which shows an example of the principal part structure of the liquid-crystal shutter glasses which concern on one Embodiment of this invention. It is sectional drawing which shows schematic structure of the liquid-crystal shutter with which the liquid-crystal shutter glasses concerning one Embodiment of this invention are provided, (a) shows the case where a liquid-crystal shutter has a horizontal polarizing plate or a vertical polarizing plate, (b) is liquid crystal. The case where a shutter has a 1st or 2nd optical filter is shown. It is a flowchart which shows an example of the synchronization adjustment process by the synchronization adjustment part with which the liquid crystal shutter glasses which concern on one Embodiment of this invention are provided. It is a figure which shows the mode of a waveform when a synchronization gap is confirmed via the liquid crystal shutter glasses which concern on one Embodiment of this invention. The state of the waveform when the display timing of the parallax image controlled by the display control device according to the embodiment of the present invention is synchronized with the opening / closing timing of the liquid crystal shutter included in the liquid crystal shutter glasses (no synchronization deviation) FIG. 6 is a diagram for explaining a waveform when a synchronization error occurs (with a synchronization error), (a) shows a waveform condition when there is no synchronization error, and (b) shows a synchronization error. The state of the waveform in the case of is shown. The state of the waveform when the display timing of the parallax image controlled by the display control device according to the embodiment of the present invention is synchronized with the opening / closing timing of the liquid crystal shutter included in the liquid crystal shutter glasses (no synchronization deviation) FIG. 5 is a diagram showing another example for explaining a waveform when a synchronization error occurs (with a synchronization error), (a) shows a waveform condition when there is no synchronization error, (b) Shows the state of the waveform when there is a synchronization error. The state of the waveform when the display timing of the parallax image controlled by the display control device according to the embodiment of the present invention is synchronized with the opening / closing timing of the liquid crystal shutter included in the liquid crystal shutter glasses (no synchronization deviation) FIG. 5 is a diagram showing still another example for explaining the waveform state when a synchronization error occurs (with a synchronization error), (a) shows the waveform condition when there is no synchronization error, and (b) ) Shows the waveform when there is a synchronization error. The state of the waveform when the display timing of the parallax image controlled by the display control device according to the embodiment of the present invention is synchronized with the opening / closing timing of the liquid crystal shutter included in the liquid crystal shutter glasses (no synchronization deviation) FIG. 5 is a diagram showing still another example for explaining the waveform state when a synchronization error occurs (with a synchronization error), (a) shows the waveform condition when there is no synchronization error, and (b) ) Shows the waveform when there is a synchronization error. The state of the waveform when the display timing of the parallax image controlled by the display control device according to the embodiment of the present invention is synchronized with the opening / closing timing of the liquid crystal shutter included in the liquid crystal shutter glasses (no synchronization deviation) FIG. 5 is a diagram showing still another example for explaining the waveform state when a synchronization error occurs (with a synchronization error), (a) shows the waveform condition when there is no synchronization error, and (b) ) Shows the waveform when there is a synchronization error.

  One embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those shown in the drawings are denoted by the same reference numerals, and description thereof is omitted.

[Schematic configuration of 3D video viewing system]
Prior to the description of the display control device 1, a 3D video viewing system 7 (stereoscopic video viewing system) including the display control device 1 will be described with reference to FIG. FIG. 2 is a schematic configuration diagram of the 3D video viewing system 7 including the display control device 1.

  The 3D video viewing system 7 according to the present embodiment uses a liquid crystal shutter glasses (visual switching mechanism, shutter glasses) 3 to display parallax images that are reproduced by the recording / reproducing device 4 and displayed on the display 2 connected to the display control device 1. A viewer who wears a 3D image (hereinafter, also referred to as “3D image” or “stereoscopic image”) may be viewed. In the display device, the parallax image may be viewed by a naked viewer as a two-dimensional image (hereinafter also referred to as “2D image”). Here, the parallax image is an image using the parallax of the left and right eyes of the viewer, and is dedicated to the 3D video, the first parallax image that allows the viewer to visually recognize through one eye, and the viewer to the other A second parallax image for visual recognition through the eyes. In the present embodiment, description will be made assuming that the first parallax video is the left-eye video and the second parallax video is the right-eye video.

  As shown in the figure, the 3D video viewing system 7 according to this embodiment mainly includes a display control device 1, a display 2, liquid crystal shutter glasses 3, a recording / reproducing device 4, a repeater 5, and an operation unit 6. Prepare. In FIG. 2, the display control device 1 and the display 2 are integrally formed to form a display device. Examples of the display device include a liquid crystal television, a liquid crystal monitor, a plasma television, a rear projection, a projector, a movie projector, a mobile phone, a personal digital assistant, a personal computer, an electronic book, and a wearable display that can display 3D video. Can be mentioned.

  The display control device 1 displays, for example, a video reproduced by the recording / reproducing device 4 on the display 2. The display control device 1 is provided with a light emitting unit 23 (light emitting means) to be described later. Depending on the light emitting state, the viewer can display the parallax image on the display 2 and determine whether the liquid crystal shutter glasses 3 are approved for viewing. It is possible to identify the synchronization state (synchronous / asynchronous) with the switching timing. The configuration of the main part of the display control device 1 will be described later.

  The display 2 displays an image output from the display control device 1. Examples of the display 2 include an LCD (liquid crystal display), a PDP (plasma display panel), or a CRT (cathode-ray tube) display. The display 2 may be provided with a parallax barrier (not shown) in the display unit. The structure of the display 2 will be described later.

  The liquid crystal shutter glasses 3 are used together with the display control device 1 and have a three-layer structure of a polarizing plate, a liquid crystal layer, and a polarizing plate. It is possible to switch whether the eye is approved. More specifically, the liquid crystal shutter glasses 3 open and close the shutters for the left and right eyes by a shutter drive signal that controls passage and blocking of light, and the shutter drive signal is a signal of a desired video signal output from the display device. It is synchronized with the field frequency, and the signal width corresponds to the video signal. Therefore, by opening and closing the shutter with this shutter drive signal, the viewer can view only the selected “video corresponding to one video signal” among the plurality of video signals in the shutter open state, and Other videos cannot be viewed with the shutter closed, and only desired videos can be viewed.

  The glasses worn by the viewer to view the stereoscopic video are not limited to the liquid crystal shutter glasses 3, and may be one that allows viewing approval or rejection using another mechanism. For example, the structure may be such that the rotating plate is attached in front of the left and right eyes of the glasses, and the plate covers the right or left eye of the glasses at the timing of closing the shutter. The configuration of the main part of the liquid crystal shutter glasses 3 will be described later.

  Also, in the figure, the liquid crystal shutter glasses 3 are connected to a display device via a relay 5 via a cable. However, the liquid crystal shutter glasses 3 may be wirelessly connected to the repeater 5 and / or the display device.

  Further, in the figure, two liquid crystal shutter glasses 3 are connected to the repeater 5. However, the number of liquid crystal shutter glasses 3 is not limited to two, and may be one or a plurality other than three.

  The operation unit 6 is used by the viewer to input an instruction signal for operating the display device and the recording / reproducing device 4. For example, a remote control for remotely operating the display device or operation buttons provided on the display device itself. Alternatively, it may be configured with a mouse, a keyboard, or the like connected to a display device. The instruction signal input by the viewer using the operation unit 6 is sent to each unit of the display device and / or the recording / reproducing device 4 via an input / output control unit (not shown). Thereby, the viewer can operate the display device and the recording / reproducing device 4.

  In the present embodiment, the operation unit 6 may realize switching between 3D video and 2D video. That is, the viewer can input the display mode (2D / 3D) of the video that he / she wants to watch by the input operation via the operation unit 6 to the display device.

  In the figure, only one operation unit 6 is shown. However, the display device and the recording / reproducing device 4 may be provided separately.

  The recording / reproducing apparatus 4 reproduces video information recorded on an information recording medium such as a BD (Blu-Ray (registered trademark) Disc), DVD (Digital Versatile Disc), HDD (Hard Disc Drive), etc. The recording / reproducing apparatus may be used.

  In the figure, it is assumed that the video signal reproduced by the recording / reproducing apparatus 4 is input to the display control apparatus 1. However, the video corresponding to the video data received using a service for distributing content such as real-time broadcasting and movies using an IP (Internet Protocol) network instead of the recording / playback device 4 is input to the display control device 1. It may be displayed on the display 2. As an example, linear TV that is a broadcast-type service that distributes a program in real time according to a determined broadcast schedule, or content that is unicasted to the content processing device in response to a distribution request from the receiving side. Video corresponding to video data acquired using VoD (Video on Demand), which is a service, may be input to the display control device 1 and displayed on the display 2. In addition, video by terrestrial digital broadcasting or cable television may be input to the display control device 1 and displayed on the display 2.

  In this embodiment, the video displayed on the display 2 is described as a 3D video composed of a left-eye video and a right-eye video using the parallax of the left and right eyes of the viewer, but is not limited thereto. It is not something.

  The repeater 5 is for connecting the display device (display control device 1 and display 2), the liquid crystal shutter glasses 3, and the recording / reproducing device 4 to each other. However, when the liquid crystal shutter glasses 3 and the recording / reproducing device 4 are directly connected to the display device, when the display device and the liquid crystal shutter glasses 3 are wirelessly connected, or the recording / reproducing device 4 is incorporated in the display control device 1. The repeater 5 is not particularly necessary when, for example.

[Configuration of display]
Next, based on FIG. 3, the configuration of the main part of the display 2 will be described taking a liquid crystal display as an example. FIG. 3 is a block diagram illustrating an example of a main configuration of the display 2.

  As shown in the figure, the display 2 is used together with the display control device 1 and includes a liquid crystal panel 50 and a backlight 51. The light emitted from the backlight 51 passes through the liquid crystal panel 50, so that a parallax image can be displayed. The liquid crystal panel 50 includes, in order from the backlight 51 side, a polarizing plate 52, a glass substrate 53, a transparent electrode 54, an alignment film 55, a liquid crystal layer 56, an alignment film 57, a transparent electrode 58, a color filter 59, a glass substrate 60, and A polarizing plate 61 is provided.

  In this configuration, by applying a voltage between the transparent electrode 54 and the transparent electrode 58 for each pixel, the alignment direction of the liquid crystal molecules in the liquid crystal layer 56 is changed. For example, when a voltage is applied, the alignment direction of the liquid crystal molecules in the liquid crystal layer 103 changes, and the light from the backlight 51 is blocked by the polarizing plate 61. In this case, the light is not emitted from the display 2. On the other hand, when no voltage is applied, the alignment direction of the liquid crystal molecules in the liquid crystal layer 56 does not change, and the light from the backlight 51 passes through the polarizing plate 61 and is emitted from the display 2. In order to realize this light blocking / transmitting, the polarizing plates 52 and 61 have polarization directions that are shifted from each other by a right angle (90 degrees).

  The glass substrates 53 and 60 are for preventing leakage of electricity generated when voltage is applied to the transparent electrode 54 and the transparent electrode 58, respectively. The alignment films 55 and 57 align the liquid crystal molecules of the liquid crystal layer 56 in a certain direction. The color filter 59 is, for example, a filter in which three primary colors of RGB are paired for each pixel.

  As described above, in the display 2, the amount of light transmitted through the liquid crystal layer 56 is adjusted for each pixel according to the amount of voltage applied between the transparent electrodes 54 and 58, and the adjusted light is transmitted through the color filter 59. Color display for each pixel is realized. In addition, since the structure from the polarizing plate 52 to the polarizing plate 61 is the same as the structure of a normal liquid crystal display, specific description is abbreviate | omitted.

  Further, the liquid crystal panel 50 of the present embodiment is provided with a circularly polarizing plate 62 on the light exit side of the polarizing plate 61. As will be described later, the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 (see FIG. 7) of the liquid crystal shutter glasses 3 are respectively provided with a horizontal polarizing plate 101a and a vertical polarizing plate 101b.

  In the present embodiment, when the first parallax image display shutter is the left-eye liquid crystal shutter 331, the second parallax image display shutter is the right-eye liquid crystal shutter 332. On the contrary, when the first parallax video display shutter is the right-eye liquid crystal shutter 332, the second parallax video display shutter is the left-eye liquid crystal shutter 331.

  Further, in the present embodiment, when simply referred to as “polarized light”, linearly polarized light is indicated unless otherwise specified. Further, “laterally polarized light” refers to linearly polarized light whose amplitude direction is the horizontal direction and coincides with the main axis of the laterally polarizing plate 101a (that is, transmits through the laterally polarizing plate 101a). On the other hand, “vertically polarized light” refers to linearly polarized light whose amplitude direction is the vertical direction and coincides with the main axis of the longitudinally polarizing plate 101b (that is, passes through the longitudinally polarizing plate 101b).

  That is, the display 2 is circularly polarized light that can be transmitted through both the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332, which is different from the laterally polarized light and the vertically polarized light that can be transmitted through the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332, respectively. To display a parallax image.

  In the case of a normal display, since the circularly polarizing plate 62 is not provided, the light emitted from the display is a straight line having the polarization direction of the light emitting side polarizing plate (corresponding to the polarizing plate 61 in FIG. 3). It is emitted as polarized light. For example, when the polarizing plate on the light emitting side is a vertical polarizing plate, the right eye liquid crystal shutter 332 having the vertical polarizing plate 101b is opened when the viewer wears the liquid crystal shutter glasses 3 and the polarized light emitted from the display is opened. The light is transmitted when it is in the state, but is not transmitted even when the liquid crystal shutter 331 for the left eye having the horizontal polarizing plate 101a is opened. For this reason, when the viewer uses the liquid crystal shutter glasses 3 of the present embodiment, the parallax image cannot be viewed with either eye even if the shutter function is operating normally.

  On the other hand, since the display 2 of the present embodiment is provided with the circularly polarizing plate 62 on the light emitting side of a normal display, the polarized light emitted from the polarizing plate 61 is transmitted through the circularly polarizing plate 62, thereby being circularly polarized. Is emitted. Circularly polarized light is transmitted through any polarizing plate, although the luminance of polarized light after transmission may be lowered. Therefore, both the horizontal polarizing plate 101a and the vertical polarizing plate 101b provided on the liquid crystal shutter 33 can be transmitted. That is, even when the viewer uses the liquid crystal shutter glasses 3, the parallax image displayed on the display 2 can be viewed with both eyes. Note that the amount of light emitted from the backlight 51 can be increased in order to prevent a decrease in the luminance of polarized light after transmission.

  In the above description, the display 2 emits circularly polarized light different from the emitted light (polarized light) emitted from the light emitting unit 23. However, the present invention is not limited to this.

  As will be described later, the liquid crystal shutter 331 for the left eye and the liquid crystal shutter 332 for the right eye can confirm the synchronization state identification information as the emitted light emitted from the light emitting unit 23 with one eye and not with the other eye. It has a configuration. For this reason, the display 2 transmits light that has a polarization state different from the polarization state of the emitted light and that transmits both the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 to an extent that the viewer can recognize. Any structure that displays parallax images by emitting light may be used. In this case, even if the viewer uses the liquid crystal shutter glasses 3 of the present embodiment, the viewer can visually recognize the left-eye video through the left-eye liquid crystal shutter 331 and the right-eye video through the right-eye liquid crystal shutter 332. The stereoscopic effect intended by the producer of the stereoscopic video can be provided.

  Further, when the display 2 uses a plasma display, since the specific light is not applied to the light emitted from the display 2, the above configuration can be realized without providing the circularly polarizing plate 62. Therefore, it is not necessary to consider a decrease in luminance due to the circularly polarizing plate 62.

[Configuration of display control device]
Next, the configuration of the main part of the display control device 1 will be described with reference to FIG. FIG. 1 is a block diagram illustrating an example of a main configuration of the display control device 1.

  The display control device 1 displays a parallax image on the display 2 and allows the viewer to view a stereoscopic image via the liquid crystal shutter glasses 3. In addition, it is intended to suppress the health hazard of the viewer during the viewing of the stereoscopic video. The display control device 1 mainly includes a control unit 10, a synchronization signal output unit 21, a light emitting unit 23, and a storage unit 24 in order to realize these configurations.

  The control unit 10 mainly includes a video output control unit 11 (video output control unit), a presentation control unit 12 (presentation control unit, presentation control step), and a synchronization signal output control unit 13, for example, by executing a control program. The members constituting the display control device 1 are controlled. The control unit 10 reads out the program stored in the storage unit 24 to a primary storage unit (not shown) configured by, for example, a RAM (Random Access Memory) and executes the program, thereby controlling the presentation of synchronization state identification information And various processes such as output control of the shutter synchronization signal.

  The video output control unit 11 receives, for example, a parallax video reproduced by the recording / playback device 4 as a video source, and alternately outputs a left-eye video and a right-eye video that are the parallax video to the display 2. That is, the video output control unit 11 causes the display 2 to alternately display the left-eye video and the right-eye video by this output. The viewer can view the parallax image as a stereoscopic image by viewing the parallax image displayed on the display 2 through the liquid crystal shutter glasses 3.

  In addition, the video output control unit 11 displays a display timing signal indicating the display timing of each of the left-eye video and the right-eye video on the display 2 (switching timing between the left-eye video and the right-eye video), and the presentation control unit 12 and the synchronization signal. It transmits to the output control unit 13. The video output control unit 11 may temporarily store the parallax video in the storage unit 24 and then display the parallax video on the display 2 so that the display timing of the parallax video and the light emission timing by the light emitting unit 23 can be synchronized. Good.

  The presentation control unit 12 displays a display timing at which one of the left-eye video and the right-eye video output from the video output control unit 11 is displayed on the display 2 and a switching timing of whether the liquid crystal shutter glasses 3 are approved for viewing (liquid crystal shutter 33 ( 6) is information that allows the viewer to identify the synchronization state with the opening / closing timing), and also presents synchronization state identification information that can be recognized by either eye of the viewer.

  Thus, the viewer can check the synchronization state between the display timing of the parallax image on the display 2 and the opening / closing timing of the liquid crystal shutter 33 in the liquid crystal shutter glasses 3 by confirming the presented synchronization state identification information. This can be confirmed while watching the video. That is, it is possible to confirm whether or not there is a synchronization shift between the display timing and the opening / closing timing during the viewing of the stereoscopic video.

  Further, the synchronization state identification information presented by the presentation control unit 12 can be recognized by one of the viewers' eyes. For this reason, the viewer can confirm the synchronization state identification information with either eye without performing the operation or control for the viewer himself or the liquid crystal shutter glasses 3 to close either eye. Therefore, it can be confirmed whether or not the synchronization deviation occurs.

  Thereafter, the display timing of the parallax image on the display 2 is simply “display timing”, the opening / closing timing of the liquid crystal shutter 33 in the liquid crystal shutter glasses 3 is simply “open / close timing”, and the synchronization deviation between the display timing and the opening / closing timing is simply “ It may be referred to as “synchronization loss”.

  Specifically, when receiving the display timing signal from the video output control unit 11, the presentation control unit 12 determines which of the left-eye video and the right-eye video is displayed, and sets the display timing to the display timing. In addition, the synchronization state identification information is output to the light emitting unit 23.

  At the time of this output, the presentation control unit 12 determines the synchronization state identification information to be presented when either the left-eye video or the right-eye video is displayed, or determines the output timing and output period of the synchronization state identification information. The identification signal output information necessary for outputting the synchronization state identification information is stored in the storage unit 24, and the setting can be changed at any time by accepting the operation of the viewer.

  For example, when the synchronization state identification information is presented by the light emission of the light emitting unit 23, the presentation control unit 12 controls the light emitting unit 23 to be turned on when the synchronization state identification information is presented and to be turned off when not presented. . In other words, the presentation control unit 12 causes the light emitting unit 23 to emit light, thereby presenting the synchronization state identification information. Thus, the viewer can check the synchronization state based on the synchronization state identification information based on the light emission state (lighted / extinguished, light / dark) of the light emitting unit 23. The confirmation of the synchronization state can recognize not only the identification of the synchronization state by turning on / off, but also how much the synchronization shift has occurred depending on the brightness level. As a result, it is possible to grasp the amount of synchronization deviation or perform synchronization control according to the amount of deviation.

  When the synchronization signal output control unit 13 receives the display timing signal from the video output control unit 11, the synchronization signal output control unit 13 controls the synchronization signal output unit 21 to convert the display timing signal into the parallax at which the liquid crystal shutter glasses 3 are displayed on the display 2. Output as a shutter synchronization signal to synchronize with the video.

  The synchronization signal output unit 21 outputs the shutter synchronization signal received from the synchronization signal output control unit 13. The synchronization signal output unit 21 includes, for example, an infrared light emitting element capable of outputting infrared light, a semiconductor light emitting element such as a light emitting diode (LED), a semiconductor laser (LD), and the like. Convert to optical signal and output.

  In this way, the display control device 1 outputs a shutter synchronization signal, and the liquid crystal shutter glasses 3 receive the shutter synchronization signal, so that the opening / closing operation of the liquid crystal shutter 33 in the liquid crystal shutter glasses 3 is displayed on the display 2. Can be synchronized with video. Thereby, it is possible to provide the viewer with a stereoscopic effect intended by the producer of the 3D video.

  The light emitting unit 23 is made of, for example, a light emitting diode, and presents synchronization state identification information received from the presentation control unit 12 by light emission under the control of the presentation control unit 12. That is, the light emitting unit 23 converts the synchronization state identification information into visible light that can be visually recognized by the viewer and emits it. In this case, the viewer can confirm the synchronization shift by confirming (or not being able to confirm) the emitted light emitted from the light emitting unit 23.

  It should be noted that the confirmation of the synchronization error is recognized by the viewer as a change in state such that the synchronization state identification information is no longer visible from the state in which the synchronization state identification information is visible, or the synchronization state identification information is in a state where the synchronization state identification information is not visible. Is done.

  Here, the presentation of the synchronization state identification information is performed in synchronization with the display timing of the left-eye video and the right-eye video. For this reason, in order to confirm the synchronization state between the display timing and the opening / closing timing, it is necessary to confirm the synchronization state identification information (confirm the synchronization deviation) with either eye. That is, if the synchronization status identification information can be confirmed with both eyes, the viewer may not be able to determine which synchronization status identification information should be confirmed with which eye.

  For this reason, when the viewer confirms the synchronization error, for example, the viewer can close one of the eyes so that the viewer can confirm the synchronization state identification information only with one of the eyes, It is necessary for the liquid crystal shutter glasses 3 to perform control for creating the situation. The control in the liquid crystal shutter glasses 3 means that the viewer maintains one of the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 in a closed state while checking the synchronization state between the display timing and the opening / closing timing. Say.

  However, as described above, the synchronization state identification information presented by the presentation control unit 12 is recognizable by any one of the viewers' eyes, so that the viewers themselves or the liquid crystal shutter glasses 3 are as described above. There is no need to perform an operation or control to close either eye. In order to realize the presentation of such synchronization state identification information, the light emitting unit 23 is provided with a polarizing plate that emits polarized light in a specific polarization direction on the emission surface. Thereby, the light emitting unit 23 can emit the synchronization state identification information as polarized light. For example, when the polarizing plate is a vertical polarizing plate, the light emitting unit 23 emits vertical polarized light.

  As will be described later, the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 of the liquid crystal shutter glasses 3 are respectively provided with the horizontal polarizing plate 101a and the vertical polarizing plate 101b, and thus the polarized light emitted from the light emitting unit 23 is , Only one of the polarizing plates is transmitted. For example, when the light emitting unit 23 is provided with a vertical polarizing plate, the polarized light emitted from the light emitting unit 23 is transmitted through the right-eye liquid crystal shutter 332 having the vertical polarizing plate 101b, but for the left eye having the horizontal polarizing plate 101a. It does not pass through the liquid crystal shutter 331.

  That is, one of the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 does not transmit the polarized light emitted from the light emitting unit 23, so that the viewer himself or the liquid crystal shutter glasses 3 can use either eye as described above. The same state as the operation or control for closing can be created. In addition, when performing this operation or control, the parallax image cannot be viewed with either eye, but in this embodiment, the parallax image is incident on the liquid crystal shutter 33 as circularly polarized light. Can obtain a stereoscopic effect due to the parallax image even during confirmation of the synchronization error.

  In other words, the light emitting unit 23 has a configuration in which the left-eye liquid crystal shutter 331 transmits horizontal polarization and does not transmit vertical polarization, and the right-eye liquid crystal shutter 332 transmits vertical polarization and transmits horizontal polarization. When it is a structure which is not made, it is the structure which radiate | emits either horizontal polarization or vertical polarization. With this configuration, the viewer can check whether or not a synchronization shift has occurred without performing an operation or control for the viewer himself or the liquid crystal shutter glasses 3 to close either eye.

  Further, the light emitting unit 23 is provided on the frame of the display 2 as shown in FIG. 2 so that the viewer can easily confirm the light emission. Not limited to this, it may be provided as a part of the display 2 or may be provided at two locations of the frame of the display 2 (for example, the right side and the left side of the display 2).

  When the light emitting unit 23 is provided as a part of the display 2, the viewer can check the synchronization state identification information on the display 2 on which the stereoscopic video is displayed. The synchronization deviation can be easily confirmed without looking away from the second. For example, as shown in FIG. 4, the light emitting unit 23 is preferably arranged in the display 2 so as not to disturb the viewing of the parallax image.

  In addition, when the light emitting unit 23 is formed of a light emitting diode or the like, the light emitting diode or the like is separately provided in the display 2. However, the present invention is not limited thereto, and is disposed on the display 2 at the position of the light emitting unit 23 illustrated in FIG. A hole may be formed in a part of the circularly polarizing plate 62. In this case, the polarized light transmitted through the polarizing plate 61 is emitted from the hole, and the circularly polarized light is emitted from the circularly polarizing plate 62 from the region other than the hole, so that the hole can function as the light emitting unit 23. it can. In addition, although realization of the light emission part 23 by this hole part is realizable with a liquid crystal display etc., realization with a self-light-emitting type plasma display panel is difficult.

  In addition, when the light emitting units 23 are provided at two places, one light emitting unit 23 is provided with the same polarizing plate as the polarizing plate included in the left eye liquid crystal shutter 331, and the other light emitting unit 23 has a right eye liquid crystal shutter. The same polarizing plate as the polarizing plate included in 332 is provided. Moreover, the light emission timing of each light emission part 23 is in the state synchronized with the display timing of each parallax image. For example, the left light-emitting unit 23 is synchronized with the display timing of the left-eye video, and the right light-emitting unit 23 is synchronized with the display timing of the right-eye video. Further, in order to facilitate confirmation of the synchronization shift, the color or pulse width of the light emitted from the two locations may be different.

  In this case, the synchronization shift between the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 in the liquid crystal shutter 33 can be confirmed. For this reason, for example, the opening operation periods of the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 are shifted in different directions (one is opened at a timing earlier than one frame of the parallax video, and the other is the parallax video. It can be confirmed that it is in the open state at a timing later than one frame) and that the shift width differs for each liquid crystal shutter.

  In addition, the presentation control unit 12 may display lights of different colors synchronized with the respective parallax images instead of turning on / off the light emitting unit 23. In this case, only one color is visible when synchronization is achieved. In this case, even if the surrounding environment is in a state where it is difficult to check on / off, it is possible to check a synchronization shift not by turning on / off but by changing the color.

  In addition, the storage unit 24 records (1) a control program for each unit, (2) an OS program, (3) an application program, and (4) various data to be read when these programs are executed. To do. The control unit 10 is configured by a nonvolatile storage device such as a ROM (Read Only Memory) flash memory. The primary storage unit described above is configured by a volatile storage device such as a RAM. However, in the present embodiment, the storage unit 24 may be described as having the function of a primary storage unit. . The storage unit 24 stores, for example, parallax video, synchronization state identification video, identification signal output information, and the like.

  Next, an example of processing in the display control apparatus 1 will be described based on FIG. FIG. 5 is a flowchart illustrating an example of processing in the display control apparatus 1.

  First, in the display control apparatus 1, the video output control unit 11 outputs the left-eye video and the right-eye video received as video sources to the display 2 (S1). At this time, the video output control unit 11 outputs the display timing signal to the presentation control unit 12 and the synchronization signal output control unit 13. The synchronization signal output control unit 13 outputs the display timing signal to the liquid crystal shutter glasses 3 as a shutter synchronization signal.

  The presentation control unit 12 causes the light emitting unit 23 to emit, for example, the polarized state identification information synchronized with the display timing of either the left-eye video or the right-eye video displayed on the display 2 by the video output control unit 11. That is, the presentation control unit 12 controls the presentation of the synchronization state identification information (S2). The parallax video output from the video output control unit 11 is displayed on the display 2 in accordance with the presentation timing. And the synchronization shift | offset | difference of the time interval shorter than the opening / closing period of the liquid-crystal shutter glasses 3 can be detected by changing the presentation timing and / or presentation time of synchronous status identification information arbitrarily.

  As described above, the display control device 1 presents the synchronization state identification information, and allows the viewer to confirm the synchronization state identification information, so that the viewer can determine whether or not synchronization has occurred during the viewing of the stereoscopic video. Can be confirmed.

  In addition, as described above, when the viewer confirms the synchronization error, for example, the viewer himself / herself can check the synchronization status identification information with only one eye. Or the liquid crystal shutter glasses 3 need to perform control for creating the situation.

  Here, since the display timing of the parallax image is normally performed at such a high speed that humans cannot recognize it, it is extremely difficult to recognize only by viewing the stereoscopic image. Even if it can be recognized that the stereoscopic video is blurred due to the synchronization shift, the stereoscopic image itself may include such a video effect, and it is not possible to uniquely recognize whether the blur is caused by the synchronization shift. Have difficulty. Also, for example, when the generated synchronization deviation is exactly half a cycle, the parallax image is viewed with the eye that should not be seen originally, but the viewer cannot recognize the blur caused by the synchronization deviation. There is a high possibility that you will continue to watch without noticing out of sync.

  That is, in the past, since it was difficult to recognize the synchronization shift during the viewing of the stereoscopic image, the viewer was highly likely to suffer health damage due to the synchronization shift.

  According to the display control device 1 and the control method thereof according to the present embodiment, the viewer can check the synchronization state identification information presented by the presentation control unit 12 via the light emitting unit 23 during the viewing of the stereoscopic video. When synchronization is lost, it can be confirmed. For this reason, even when the synchronization shift occurs during the viewing of the stereoscopic video, the viewer recognizes the possibility of failure of the device (for example, the display 2 or the liquid crystal shutter glasses 3) related to the stereoscopic video viewing. Thus, it is possible to take measures not to suffer from the health damage due to the synchronization error, such as stopping the viewing of the stereoscopic image or trying to repair the failed device.

  In addition, since the presentation control unit 12 presents synchronization state identification information that can be recognized by one of the viewer's eyes, the viewer himself or the liquid crystal shutter glasses 3 closes one of the eyes as described above. Even if the operation or control is not performed, the synchronization state identification information can be confirmed with one of the eyes. That is, it is possible to improve convenience when the viewer confirms the synchronization error.

  That is, there is an effect that the viewer can check the synchronization shift during the viewing of the stereoscopic video without requiring the viewer's trouble or the control by the liquid crystal shutter glasses 3 to save the trouble. Thereby, when a synchronization shift occurs during the viewing of a stereoscopic video, there is an effect that health damage due to the synchronization shift can be suppressed.

  In the above description, the light emitting unit 23 has been described as having a configuration capable of emitting either longitudinally polarized light or laterally polarized light, but in short, the viewer can select either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332. It is only necessary to confirm the synchronization status identification information via the. That is, it is not necessary for the light emitting unit 23 to emit light that can be transmitted through either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332 but not through the other, and can be transmitted through one of the liquid crystal shutters 33. Even if the liquid crystal shutter 33 is transmitted through the other liquid crystal shutter 33, it is only necessary that the viewer cannot recognize the emitted light through the other liquid crystal shutter (the viewer's one eye cannot recognize the emitted light). Good.

  In this case, the light emitting unit 23 emits light of a specific polarization state as outgoing light, not limited to either longitudinally polarized light or laterally polarized light, and the transmission state of the left-eye liquid crystal shutter 331 with respect to the emitted light and the right-eye use light Any difference from the transmission state of the liquid crystal shutter 332 may be recognized by the viewer. At this time, the presentation control unit 12 controls whether or not the emitted light is emitted from the light emitting unit 23.

  According to this configuration, the viewer can confirm the synchronization state based on the synchronization state identification information based on the light emission state from the light emitting unit 23. Further, the viewer can recognize that the emitted light in a specific polarization state has passed through either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332 by recognizing the difference in the transmission state. . That is, the synchronization state identification information as the emitted light can be confirmed with one eye and not confirmed with the other eye.

  As a result, the viewer can check whether or not synchronization has occurred without performing any operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

(Modification of display control device)
In addition, in order to realize the presentation of synchronization state identification information that can be recognized by one of the viewers' eyes, the light emitting unit 23 is not configured to provide a polarizing plate, but can emit light having specific optical characteristics. It may be.

  In this case, the light emitting unit 23 is configured such that the liquid crystal shutter for left eye 331 transmits light having the first optical characteristic and the second optical characteristic, and the liquid crystal shutter for right eye 332 transmits light having the second optical characteristic, When the light having the first optical characteristic is not transmitted, the light having the first optical characteristic is emitted. That is, when one of the liquid crystal shutters 33 transmits light having the first optical characteristic and the second optical characteristic, and the other transmits light having the second optical characteristic and does not transmit light having the first optical characteristic. The light emitting unit 23 may be configured to emit light having the first optical characteristic.

  For example, the light having the first optical characteristic is red light in a specific wavelength region, the light having the second optical property is light in a wavelength region other than the red light, and the light emitted from the light emitting unit 23 is Let it be red light.

  In this case, for example, an optical filter is provided on the surface of the light emitting unit 23 in order to emit the red light. As this optical filter, for example, a BPF (Band Pass Filter) capable of transmitting light in a specific wavelength region is used.

  In addition, for example, light in all wavelength regions including the red light is transmitted to the outside of the left-eye liquid crystal shutter 331 (the light incident side from the display 2), or the transmittance of the red light is all other than that. An optical filter 108a for the left eye that is higher than the light transmittance in the wavelength region is provided. When light in all wavelength regions is transmitted, the left-eye liquid crystal shutter 331 may not be provided with an optical filter.

  On the other hand, on the outside of the right-eye liquid crystal shutter 332, a right-eye optical filter 108b that transmits light in a wavelength region other than the red light (that is, does not transmit the red light) is provided. In this case, as the right-eye optical filter 108b, for example, a BSF (Band Stop Filter) capable of not transmitting the red light emitted from the light emitting unit 23 is used. This BSF blocks (reflects) the transmission of light in a specific wavelength region.

  According to the above configuration, as in the case where the polarizing plate is used for the light emitting unit 23 as described above, the viewer performs an operation or control for closing the eyes of the viewer himself or the liquid crystal shutter glasses 3. Without doing so, it is possible to check whether or not there is a synchronization error. Further, in this case, since no polarizing plate is used for the light emitting unit 23, the light emitted from the display 2 does not need to be circularly polarized. That is, even if it is not a display device provided with the display 2 having the circularly polarizing plate 62 but a display device provided with a normal display, the synchronization state can be confirmed without performing the above operation or control. .

  The light as the synchronization state identification information is not limited to red light, but may be any wavelength region as long as the viewer can recognize the synchronization state identification information. Further, the light having the second optical characteristic may be the above-described red light, and the light having the first optical characteristic may be light in a wavelength region other than the red light. In this case, the light emitting unit 23 emits light having the second optical characteristic, one of the liquid crystal shutters 33 transmits light having the first optical characteristic and the second optical characteristic, and the other transmits light having the first optical characteristic. It is configured to transmit and not transmit light having the second optical characteristic. In short, it is only necessary that the viewer can confirm the synchronization state identification information via either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332.

  In other words, the light emitting unit 23 emits not only one of the light having the first optical characteristic and the light having the second optical characteristic, but the light having the specific optical characteristic as the emitted light, It is sufficient that the viewer can recognize the difference between the transmission state of the left-eye liquid crystal shutter 331 and the transmission state of the right-eye liquid crystal shutter 332.

  Even in this configuration, as in the case where the light emitting unit 23 emits light of a specific polarization state, the viewer recognizes the difference in the transmission state, so that the emitted light having specific optical characteristics is The liquid crystal shutter 331 for the right eye and the liquid crystal shutter 332 for the right eye can be recognized as being transmitted.

  Further, the synchronization signal output unit 21 may not be provided in the display control device 1, and in this case, the display control device 1 and this member may be connected. For example, in a 3D video viewing system such as a movie theater, there is one display control device 1 and one display 2 (that is, one display device), but the synchronization signal output unit 21 may be provided for each viewing seat. . As long as at least the synchronization signal output unit 21 is configured separately from the display control device 1, the effect of the present embodiment can be obtained even in such a 3D video viewing system.

[Configuration of LCD shutter glasses]
Next, the main configuration of the liquid crystal shutter glasses 3 will be described with reference to FIGS. FIG. 6 is a block diagram illustrating an example of a main configuration of the liquid crystal shutter glasses 3.

  The liquid crystal shutter glasses 3 are used together with the display control device, and are provided with a liquid crystal shutter 33 in order to switch whether or not the viewer is permitted to view the left and right eyes. Specifically, the liquid crystal shutter 33 includes a left eye liquid crystal shutter 331 that can be opened and closed in synchronization with the display timing of the left eye video, a right eye liquid crystal shutter 332 that can be opened and closed in synchronization with the display timing of the right eye video, It has. Thereby, the viewer can view the parallax image as a stereoscopic image. In addition, with this configuration, the viewer can check the synchronization status identification information presented by the presentation control unit 12, so that the synchronization can be confirmed when the synchronization shift occurs.

  Here, FIG. 7 shows an example of a cross section of the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 of the liquid crystal shutter glasses 3 of the present embodiment. FIG. 7 is a cross-sectional view illustrating a schematic configuration of the liquid crystal shutter 33. FIG. 7A illustrates a case where the liquid crystal shutter 33 includes the horizontal polarizing plate 101a or the vertical polarizing plate 101b. As shown in the drawing, in the left-eye liquid crystal shutter 331, the horizontal polarizing plate 101a, the transparent electrode 102, the liquid crystal layer 103, the transparent electrode 104, and the polarizing plate 105 are arranged in this order. On the other hand, in the right-eye liquid crystal shutter 332, the vertical polarizing plate 101b, the transparent electrode 102, the liquid crystal layer 103, the transparent electrode 104, and the polarizing plate 105 are arranged in this order.

  In the liquid crystal shutter 33, the alignment direction of the liquid crystal molecules in the liquid crystal layer 103 is changed by applying a voltage from the power source 107 between the transparent electrode 102 and the transparent electrode 104. For example, when the power switch 106 is turned on (ON), the alignment direction of the liquid crystal molecules in the liquid crystal layer 103 changes, and the light 111a is transmitted through the horizontal polarizing plate 101a or the vertical polarizing plate 101b, the transparent electrode 102, the liquid crystal layer 103, and the transparent electrode. After passing through 104, it is blocked by the polarizing plate 105. In this case, the light 111 a does not reach the viewer's eyes 112. That is, at this time, the liquid crystal shutter 33 is in a light blocking state.

  On the other hand, when the power switch 106 is turned off, the alignment direction of the liquid crystal molecules in the liquid crystal layer 103 does not change, and the light 111b is transmitted through the horizontal polarizing plate 101a or the vertical polarizing plate 101b, the transparent electrode 102, the liquid crystal layer 103, and the transparent The light passes through the electrode 104 and the polarizing plate 105 in this order, and reaches the viewer's eyes 112. That is, at this time, the liquid crystal shutter 33 is in a light transmitting state.

  A liquid crystal shutter such as the liquid crystal shutter 33 that enters a light transmitting state when no voltage is applied is called “normally white”. In contrast to the liquid crystal shutter 33, a liquid crystal shutter that is in a light blocking state when no voltage is applied is called "normally black".

  Here, the light transmission / blocking operation of the liquid crystal shutter 33 will be described.

  As described above, the liquid crystal molecules of the liquid crystal layer 103 change the alignment direction by applying a voltage between the transparent electrode 102 and the transparent electrode 104. The liquid crystal layer 103 can change the polarization direction of light passing through the liquid crystal layer 103 by changing the alignment direction of the liquid crystal molecules.

  On the other hand, the horizontal polarizing plate 101a and the polarizing plate 105 of the left-eye liquid crystal shutter 331, and the vertical polarizing plate 101b and the polarizing plate 105 of the right-eye liquid crystal shutter 332 have polarization directions that are perpendicular to each other. The light transmitted through the horizontal polarizing plate 101 a or the vertical polarizing plate 101 b is completely blocked by the polarizing plate 105 as long as the polarization direction does not coincide with the polarizing direction of the polarizing plate 105.

  For example, it is assumed that the liquid crystal layer 103 changes the polarization direction of light passing through it when no voltage is applied, and does not change the polarization direction of light passing through it when a voltage is applied.

  In this case, when the power switch 106 is turned on and a voltage is applied to the liquid crystal layer 103, the light 111a that has passed through the liquid crystal layer 103 reaches the polarizing plate 105 without changing its polarization direction. The polarization direction of the light 111a transmitted through the horizontal polarizing plate 101a or the vertical polarizing plate 101b matches the polarization direction of the horizontal polarizing plate 101a or the vertical polarizing plate 101b. For this reason, the polarization direction of the light 111 a and the polarization direction of the polarizing plate 105 are shifted at right angles, and as a result, the light 111 a is blocked by the polarizing plate 105.

  On the other hand, when the power switch 106 is turned off and no voltage is applied to the liquid crystal layer 103, the light 111 b that has passed through the liquid crystal layer 103 changes its polarization direction by the liquid crystal layer 103. For example, it is assumed that the polarization direction of the light 111b changes at right angles along the alignment direction of the liquid crystal molecules in the liquid crystal layer 103. At this time, the polarization direction of the light 111 b matches the polarization direction of the polarizing plate 105, and as a result, the light 111 b passes through the polarizing plate 105.

  The liquid crystal shutter 33 uses the phenomenon that the birefringence of PLZT changes when a voltage is applied to PLZT (lead lanthanum zirconate titanate), and the PLZT and two polarizing plates as described above are used. A combined optical shutter may be used. This optical shutter uses PLZT instead of the liquid crystal layer 103 of the liquid crystal shutter 33 as described above. PLZT can electrically control optical performance, that is, change in birefringence. In such an optical shutter, similarly to the liquid crystal shutter 33, switching between a light transmitting state and a light blocking state by voltage application can be realized. Further, as the liquid crystal shutter 33, one that transmits or blocks light by changing the alignment direction of one polarizing plate and the liquid crystal may be used. In this case, since only one polarizing plate is necessary, the cost can be reduced.

  Here, in the case of a normal liquid crystal shutter, the polarization directions of the polarizing plate of the left-eye liquid crystal shutter and the polarizing plate of the right-eye liquid crystal shutter on the side where light from the display is incident are the same. This is because the light emitted from the display is usually polarized light having a predetermined polarization direction (for example, longitudinally polarized light), and these liquid crystal shutters are also manufactured in accordance with the polarization direction of the polarized light.

  On the other hand, in the present embodiment, the left-eye liquid crystal shutter 331 has a horizontal polarizing plate 101a capable of transmitting horizontal polarized light, and the right-eye liquid crystal shutter 332 has a vertical polarizing plate 101b capable of transmitting vertical polarized light. This is because, as described above, the polarized light emitted from the light emitting unit 23 is transmitted through only one of the liquid crystal shutters 33 and is not transmitted through the other. As a result, the viewer can confirm whether or not there is a synchronization shift without performing the operation or control for the viewer himself or the liquid crystal shutter glasses 3 to close one of the eyes.

  In addition, the liquid crystal shutter glasses 3 mainly include a synchronization signal receiving unit 31, a shutter control unit 32, a light receiving sensor 36, an operation unit 37, and a storage unit 38.

  The synchronization signal receiving unit 31 receives the shutter synchronization signal output from the synchronization signal output unit 21. The synchronization signal receiving unit 31 includes, for example, an infrared light receiving element capable of receiving infrared light and a laser light receiving element capable of receiving laser light from an LED or the like, and the shutter control unit 32 can process an optical signal as a shutter synchronization signal. Is converted into a simple signal (for example, a digital signal) and transmitted to the shutter control unit 32. Accordingly, the shutter opening / closing control unit 322 of the shutter control unit 32 can control the opening / closing operation of the liquid crystal shutter 33 in accordance with the display timing of the parallax image displayed on the display 2, so the liquid crystal shutter glasses 3 are worn. It is possible to provide the viewer with the stereoscopic effect intended by the producer of the 3D video.

  The shutter control unit 32 mainly includes a synchronization adjustment unit 321 and a shutter opening / closing control unit 322, and controls members constituting the liquid crystal shutter glasses 3 by executing a control program, for example. The shutter control unit 32 reads the program stored in the storage unit 38 to a primary storage unit (not shown) configured by, for example, a RAM, and executes it, thereby controlling the shutter opening / closing operation and causing a synchronization error. Various processing such as synchronization adjustment is performed.

  When there is a synchronization shift between the display timing of the parallax image and the opening / closing timing of the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332, the synchronization adjustment unit 321 displays the synchronization shift as the left-eye liquid crystal shutter 331 or The adjustment is based on the amount of light emitted from the light emitting unit 23 that is transmitted through the right-eye liquid crystal shutter 332.

  Here, an example of the synchronization adjustment processing by the synchronization adjustment unit 321 will be described based on FIGS. 8 and 9. FIG. 8 is a flowchart illustrating an example of synchronization adjustment processing by the synchronization adjustment unit 321. FIG. 9 is a diagram showing a waveform when a synchronization shift occurs.

  After the presentation control unit 12 causes the synchronization state identification information to be presented (S11), the viewer confirms whether the synchronization shift has occurred during the viewing of the stereoscopic video by confirming the synchronization state identification information (S12). When it can be confirmed that no synchronization deviation has occurred (NO in S12), the synchronization adjustment by the synchronization adjustment unit 321 is not performed. On the other hand, when it is confirmed that a synchronization error has occurred (YES in S12), the viewer instructs the synchronization adjustment unit 321 to perform synchronization adjustment via the operation unit 37 at that time.

  For example, in a configuration in which synchronization state identification information (light emission by the light emitting unit 23) cannot be visually recognized when a synchronization deviation occurs, the viewer determines that there is no synchronization deviation when the synchronization state identification information is visible. Then, it is determined that a synchronization error has occurred since it was no longer visible.

  When receiving the instruction, the synchronization adjustment unit 321 performs the synchronization adjustment so that the synchronization deviation is eliminated (S13). Specifically, the synchronization adjustment unit 321 makes the opening / closing timing of the liquid crystal shutter 33 earlier or later by a predetermined time, and causes the light receiving sensor 36 to detect the amount of light emitted from the light emitting unit 23. The predetermined time is sufficiently shorter than the display period of the left-eye video or the right-eye video. Then, it is confirmed whether or not the amount of light detected by the light receiving sensor 36 is a transmission amount (maximum transmission amount) when the light emitted from the light emitting unit 23 is transmitted through the liquid crystal shutter 33 when synchronization is established. (S14). That is, the synchronization adjusting unit 321 adjusts the shutter opening start position of the liquid crystal shutter 33 so that the light emission intensity by the light emitting unit 23 is maximized.

  If the synchronization adjustment unit 321 determines that the amount of light is not the maximum transmission amount (NO in S14), the process returns to S13. That is, the synchronization adjustment unit 321 shifts the opening / closing timing of the liquid crystal shutter 33 until the maximum transmission amount is reached. If it is determined that the amount of light has reached the maximum transmission amount (YES in S14), the synchronization adjustment is terminated.

  For example, in FIG. 8, the opening / closing timing of the liquid crystal shutter 33 is shifted by a predetermined time (by one synchronization adjustment amount) until the light amount reaches the maximum transmission amount.

  On the other hand, when the synchronization state identification information (light emission by the light emitting unit 23) can be visually recognized when the synchronization shift occurs, the viewer can synchronize the synchronization adjusting unit via the operation unit 37 when the viewer can visually recognize the synchronization state identification information. 321 is instructed to perform synchronization adjustment.

  When receiving the instruction, the synchronization adjustment unit 321 shifts the opening / closing timing of the liquid crystal shutter 33 by a predetermined time and causes the light receiving sensor 36 to detect the amount of light emitted from the light emitting unit 23 as described above. Then, it is confirmed whether the light transmission amount is a minimum transmission amount (for example, 0) that cannot be visually recognized, and the opening / closing timing of the liquid crystal shutter 33 is shifted until the minimum transmission amount is reached. Then, when the amount of light reaches the minimum transmission amount, the synchronization adjustment ends.

  In this way, the synchronization adjustment unit 321 can synchronize even when the synchronization deviation occurs.

  In “display of synchronization state identification information” in FIG. 9, “ON” indicates a state where the light emitting unit 23 emits light, and the length of the arrow indicates the light emission period. That is, during a period in which the arrow is not shown, the light emitting unit 23 does not emit light (“OFF”). The waveform of “video display” indicates the frame of the left-eye video and the right-eye video. When the solid line is “ON”, the left-eye video is in the display state, the right-eye video is in the non-display state, and the dotted line “ When ON, the right-eye video is displayed and the left-eye video is not displayed. “Right-eye shutter” indicates the open / close state of the right-eye liquid crystal shutter 332, “Left-eye shutter” indicates the open / close state of the left-eye liquid crystal shutter 331, “ON” indicates the open state, and “OFF” indicates the closed state. Indicates the state.

  Further, FIG. 9 shows a case where the light emitted from the light emitting unit 23 is vertically polarized light, the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, and the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a. In addition, a waveform is shown in the case where the presentation control unit 12 causes the light emitting unit 23 to emit light by causing the light emitting unit 23 to emit light when the video output control unit 11 displays the left-eye video on the display 2. ing. In addition, the presentation period of synchronization state identification information (light emission time by the light emitting unit 23), the display period of parallax video, and the open state period of the liquid crystal shutter 33 are substantially the same.

  In the drawing, when the left-eye video is in the display state and the light emitting unit 23 is in the light-emitting state, the right-eye liquid crystal shutter 332 is not in the left-eye liquid crystal shutter 331 but the open state. That is, FIG. 9 shows a waveform when a synchronization shift occurs, and at this time, the viewer visually recognizes the vertically polarized light emitted from the light emitting unit 23 with the right eye.

  The synchronization adjustment unit 321 may be configured to adjust the open state period. Further, instead of the synchronization adjustment unit 321, a synchronization adjustment button (not shown) for manually performing synchronization adjustment may be provided on the glasses frame of the liquid crystal shutter glasses 3. In this case, the opening / closing timing of the liquid crystal shutter 33 can be shifted while the viewer is pressing the synchronization adjustment button, and when it is determined that the amount of light is sufficient (or the light emission cannot be confirmed) Stop pressing the synchronization adjustment button. Thereby, the viewer himself / herself can manually perform the synchronization adjustment.

  In this case, the light receiving sensor 36 for receiving the light emitted from the light emitting unit 23 and the synchronization adjusting unit 321 are not necessary, and the weight of the liquid crystal shutter glasses 3 can be reduced or the manufacturing cost can be suppressed. In addition, since the synchronization adjustment is performed based on the sense of viewing by the viewer, it is possible to synchronize with the optimal state for the viewer.

  The synchronization adjustment unit 321 or the synchronization adjustment button may be provided not in the liquid crystal shutter glasses 3 but in a synchronization adjustment operation device (for example, a remote controller).

  The shutter opening / closing controller 322 controls the opening / closing operation of the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 according to the shutter synchronization signal received by the synchronization signal receiver 31 by controlling the power switch 106. Thereby, control of the opening / closing operation | movement according to the display timing is realizable.

  The light receiving sensor 36 detects the light quantity of the synchronization state identification information (light from the light emitting unit 23) in the liquid crystal shutter 33 under the control of the synchronization adjusting unit 321, and transmits the detection result to the synchronization adjusting unit 321.

  The operation unit 37 receives an operation of the viewer such as a power on / off switching instruction and a synchronization adjustment instruction.

  The storage unit 38 records (1) a control program for each unit executed by the shutter control unit 32, (2) an OS program, (3) an application program, and (4) various data read when the program is executed. Is. The shutter control unit 32 is configured by a nonvolatile storage device such as a ROM flash memory, for example. The primary storage unit described above is configured by a volatile storage device such as a RAM. However, in the present embodiment, the storage unit 38 may be described as having a primary storage unit function. . The storage unit 38 stores, for example, the maximum transmission amount and the minimum transmission amount.

  Here, in the above description, the left-eye liquid crystal shutter 331 has the horizontal polarizing plate 101a, and the right-eye liquid crystal shutter 332 has the vertical polarizing plate 101b. May include the vertical polarizing plate 101b, and the right-eye liquid crystal shutter 332 may include the horizontal polarizing plate 101a. Further, the polarizing plate disposed on the incident side of the light from the display 2 is not limited to the horizontal polarizing plate 101a and the vertical polarizing plate 101b, but the polarizing plate which one liquid crystal shutter 33 has is polarized light emitted from the light emitting unit 23. The polarizing plate of the other liquid crystal shutter 33 can transmit the polarized light. The light emitting unit 23 may be configured to emit polarized light having a specific polarization direction, and this polarized light may be configured to transmit one of the liquid crystal shutters 33 and not transmit the other.

  That is, one of the liquid crystal shutters 33 has a polarizing plate that transmits polarized light having a specific polarization direction emitted from the light emitting section 23, and the other has a polarizing plate that does not transmit the polarized light (for example, a polarizing plate that transmits the polarized light). Any structure having a polarizing plate whose polarization direction is deviated at right angles may be used.

  Further, in the above, one of the liquid crystal shutters 33 on the incident side of the light emitted from the display 2 can transmit the emitted light emitted from the light emitting unit 23, and the other polarizing plate corresponds to the output light. The description has been made assuming that the configuration cannot transmit the incident light. However, as described above, in short, it is only necessary for the viewer to check the synchronization state identification information via either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332. That is, one of the liquid crystal shutters 33 can transmit the emitted light emitted from the light emitting unit 23, but even if the other liquid crystal shutter 33 transmits the emitted light, the viewer can pass through the other liquid crystal shutter. It suffices if the configuration is such that the emitted light cannot be recognized (the emitted light cannot be recognized by one eye of the viewer).

  In this case, the transmittance of the first polarizing plate included in the left-eye liquid crystal shutter 331 (or right-eye liquid crystal shutter 332) with respect to the emitted light emitted from the light emitting unit 23 is the right-eye liquid crystal shutter 332 (or the left-eye liquid crystal shutter 331). It is sufficient that the transmittance of the second polarizing plate of the second polarizing plate is higher than that of the emitted light.

  According to this configuration, the viewer transmits outgoing light (light of a specific polarization state) as synchronization state identification information through the left-eye liquid crystal shutter 331 (or right-eye liquid crystal shutter 332) having the first polarizing plate. It can be recognized as a thing. That is, the synchronization state identification information is confirmed by the eye viewing the parallax image through one of the liquid crystal shutters 33 and is not confirmed by the eye viewing the parallax image through the other liquid crystal shutter 33. be able to.

  As a result, the viewer can check whether or not synchronization has occurred without performing any operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  For example, when the light emitting unit 23 emits longitudinally polarized light, the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a, and the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, the viewer changes the vertical polarization to the right-eye. This can be confirmed through the liquid crystal shutter 332 for use. In this case, the vertical polarizing plate 101b becomes the “first polarizing plate”, and the horizontal polarizing plate 101a becomes the “second polarizing plate”. Of course, when the light emitting unit 23 emits laterally polarized light, the opposite configuration is obtained.

(Modified example of LCD shutter glasses)
In addition, in order to realize presentation of synchronization state identification information that can be recognized by one of the viewer's eyes, the light emitting unit 23 is not configured to have a polarizing plate, but has light having specific optical characteristics (for example, specific wavelength) In the case of a configuration that emits red light in the region, the liquid crystal shutter glasses 3 do not have to include the horizontal polarizing plate 101a and the vertical polarizing plate 101b. In this case, as shown in FIG. 7B, the polarizing plate 101 having the same polarization direction is used for both the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 as the polarizing plate on the incident side of the light emitted from the display. Used. FIG. 7B shows a case where the liquid crystal shutter 33 includes the left-eye optical filter 108a or the right-eye optical filter 108b.

  Instead, in order to prevent light having specific optical characteristics emitted from the light emitting unit 23 from being transmitted through one liquid crystal shutter 33 and not from the other liquid crystal shutter 33, the display of the polarizing plate is further displayed. Optical filters having different optical characteristics are provided on the incident side of the light emitted from. Specifically, when the light emitting unit 23 emits light having the first optical characteristic, the left-eye liquid crystal shutter 331 includes the left-eye optical filter 108a that can transmit light having the first optical characteristic and the second optical characteristic. And the right-eye liquid crystal shutter 332 includes a right-eye optical filter 108b that can transmit light having the second optical characteristic and not transmit light having the first optical characteristic.

  That is, when the light emitting unit 23 emits light having a first optical characteristic (light having a specific wavelength region), for example, light in all wavelength regions including light having the first optical property as the left-eye optical filter 108a. Or has a first optical characteristic as the optical filter 108b for the right eye, using an optical filter that has a higher transmittance of light having a first optical characteristic than that of light in all other wavelength regions. A BSF that does not transmit light is used. The reverse configuration is also possible. On the other hand, when the light emitting unit 23 emits light having the second optical characteristic (light having a specific wavelength range), for example, the left-eye optical filter 108a includes all the wavelength ranges including light having the second optical characteristic. An optical filter that transmits light or has light transmittance having a second optical characteristic is higher than that of light in all other wavelength regions, and the second optical characteristic as the right-eye optical filter 108b. A BSF that does not transmit light is used. The reverse configuration is also possible. Note that the liquid crystal shutter 33 on the side that transmits light in all wavelength regions may not be provided with an optical filter.

  As described above, even when the left-eye optical filter 108a or the right-eye optical filter 108b is used, as in the case where the horizontal polarizing plate 101a and the vertical polarizing plate 101b are used for the liquid crystal shutter 33 and the like as described above, The person can confirm whether or not the above-mentioned synchronization shift has occurred without performing an operation or control for the viewer himself or the visual switching mechanism to close one of the eyes.

  Here, in the above, one of the liquid crystal shutters 33 on the incident side of the light emitted from the display 2 can transmit the emitted light emitted from the light emitting unit 23, and the other optical filter is The description has been made assuming that the configuration cannot transmit outgoing light. However, as described above, in short, it is only necessary for the viewer to check the synchronization state identification information via either the left-eye liquid crystal shutter 331 or the right-eye liquid crystal shutter 332.

  In this case, the transmittance of the first optical filter included in the left-eye liquid crystal shutter 331 (or right-eye liquid crystal shutter 332) with respect to the emitted light emitted from the light emitting unit 23 is the right-eye liquid crystal shutter 332 (or the left-eye liquid crystal shutter 331). It is sufficient that the transmittance of the second optical filter of the second optical filter with respect to the emitted light is higher.

  Even in this configuration, similarly to the configuration in which the liquid crystal shutter 33 includes the first polarizing plate and the second polarizing plate, the viewer uses the outgoing light (light having specific optical characteristics) as the synchronization state identification information. It can be recognized as having passed through the left-eye liquid crystal shutter 331 (or right-eye liquid crystal shutter 332) having one optical filter.

  For example, when the light emitting unit 23 emits red light in a specific wavelength region, if the viewer recognizes the red light with the left eye, the left-eye optical filter 108a is the “first optical filter” (the right-eye optical filter 108b is If the red light is recognized by the right eye, the right eye optical filter 108b becomes the “first optical filter” (the left eye optical filter 108a becomes the “second optical filter”).

  These optical filters may be any filter that changes the transmittance with respect to the emitted light having a specific wavelength. For example, the optical filter is a filter using a photonic crystal that can control whether light with a specific wavelength can be transmitted. There may be.

[Checking the synchronization status of display timing and opening / closing timing]
Next, based on FIGS. 10 to 13, when the synchronization between the display timing of the parallax video and the opening / closing timing of the liquid crystal shutter 33 is established (no synchronization deviation), and when the synchronization deviation occurs. The state of the waveform (with synchronization error) will be described. 10 to 13, “Display of synchronization state identification information”, “Video display”, “Right-eye shutter”, and “Left-eye shutter” are as described in FIG. 9. 10 to 13, the description of no synchronization deviation and the presence of synchronization deviation is shown in which the light emitting unit 23 emits longitudinally polarized light or laterally polarized light, the left-eye liquid crystal shutter 331 includes the laterally polarizing plate 101a, and the right-eye liquid crystal. The case where the shutter 332 includes the vertical polarizing plate 101b is taken as an example.

(When the synchronization state identification information becomes visible when synchronization loss occurs: Part 1)
First, FIG. 10 illustrates a case where the light emitted from the light emitting unit 23 is vertically polarized light, the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, and the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a. In addition, a waveform is shown in the case where the presentation control unit 12 causes the light emitting unit 23 to emit light by causing the light emitting unit 23 to emit light when the video output control unit 11 displays the left-eye video on the display 2. ing. Further, the presentation period of the synchronization state identification information, the display period of the parallax image, and the open state period of the liquid crystal shutter 33 are substantially the same.

  As shown in FIG. 10A, when there is no synchronization shift, the right-eye liquid crystal shutter 332 having the vertical polarizing plate 101b is opened while the right-eye image is displayed on the display 2. However, since the vertically polarized light is emitted from the light emitting unit 23 while the left-eye image is displayed, the viewer cannot visually recognize the vertically polarized light when viewing the right-eye image. That is, in FIG. 10, the viewer can determine that there is no synchronization error when the synchronization status identification information cannot be confirmed.

  On the other hand, FIG. 10B shows a case where a synchronization deviation (synchronization deviation amount is about ¼ period) occurs in which the synchronization deviation amount is smaller than a half cycle. In this case, the right-eye liquid crystal shutter 332 is in the open state during the shaded period in FIG. 6 in which the left-eye image is displayed and the light-emitting unit 23 is in the light-emitting state. That is, the viewer can check the longitudinally polarized light emitted from the light emitting unit 23 with the right eye when the synchronization shift occurs.

  That is, in FIG. 10, the presentation control unit 12 displays the right-eye video on the display 2 so that the right-eye can be recognized while the video output control unit 11 displays the left-eye video on the display 2. The synchronization state identification information is presented so that it can be recognized by the left eye.

  In this configuration, when synchronization is established, the synchronization state identification information is not confirmed by the left eye that should visually recognize the left-eye image or the right eye that should visually recognize the right-eye image. The synchronization status identification information is confirmed for the first time. Therefore, the viewer can confirm the synchronization shift without disturbing the viewing while viewing the stereoscopic video.

  Further, when the light emission period of the light emitting unit 23 is substantially the same as the display period of the left-eye video or the right-eye video and the synchronization state identification information can be confirmed when no synchronization deviation occurs, For example, it can be confirmed for the first time that a synchronization error has occurred (for example, when the left-eye image cannot be confirmed with the left eye but can be confirmed with the right eye).

  However, as shown in FIG. 10, when the synchronization state identification information can be confirmed when a synchronization shift occurs, the light emission period of the light emitting unit 23 substantially matches the display period of the left-eye video, and the synchronization shift amount is Even when the period is smaller than the half cycle, the viewer can recognize that the synchronization shift has occurred by confirming the light emission by the light emitting unit 23 during the viewing of the stereoscopic video. In this case, since the light emission by the light emitting unit 23 can be confirmed when synchronization occurs, it is easier to recognize the synchronization deviation than when the light emission cannot be confirmed.

  Further, in FIG. 10, the presentation control unit 12 emits light so that the right-eye video and the left-eye video are not displayed as the light-emitting period of the light-emitting unit 23. In the case of controlling the state, even if the synchronization is slightly shifted, the viewer can confirm that the synchronization shift has occurred. It should be noted that it is possible to appropriately change how much the synchronization deviation occurs when the viewer recognizes the synchronization deviation. For example, it can be changed by adjusting the light emission period.

  10 to 12, there is a “crosstalk” in which the left-eye video is seen by the right eye, or the right-eye video is seen by the left eye, thereby blurring the video.

(When synchronization deviation occurs, the synchronization status identification information becomes visible: Part 2)
Next, a case where the synchronization is shifted by a half cycle in the same situation as in FIG. 10 will be described based on FIG. FIG. 11A shows a case where there is no synchronization deviation, and the situation is the same as that in FIG.

  FIG. 11B shows a case where a half-cycle synchronization error (a synchronization error amount is a half-cycle) occurs. In this case, when the left-eye image is in the display state and the light-emitting unit 23 is in the light-emitting state, the right-eye liquid crystal shutter 332 is in the open state, the right-eye image is in the display state, and the light-emitting unit 23 is in the display state. Is in the non-light emitting state, the right-eye liquid crystal shutter 332 is in the closed state. That is, as in FIG. 10B, the vertically polarized light (synchronization state identification information) emitted from the light emitting unit 23 can be confirmed with the right eye. FIG. 11B shows a state in which the left-eye video is viewed with the right eye and the right-eye video is viewed with the left eye.

  In this way, in a state where the left-eye video and the right-eye video are displayed in reverse, the viewer does not notice that the video is blurred, and the stereoscopic effect as intended by the producer of the stereoscopic video is displayed. May be misunderstood as being able to appreciate. In this case, since the viewer continues to view the stereoscopic video as it is, there is a very high possibility that the viewer will suffer a health hazard.

  In the present embodiment, even when a half-cycle synchronization shift as shown in FIG. 11B occurs, as in the case of FIG. 10B, the viewer uses the right eye to view the vertically polarized light emitted from the light emitting unit 23. Since this can be confirmed, it is possible to recognize that the synchronization shift has occurred during the viewing of the stereoscopic video. Thereby, the viewer can take measures so as not to suffer from the health damage due to the synchronization error.

  Further, when the synchronization deviation occurs little by little, the synchronization deviation occurs when the synchronization deviation as shown in FIG. 10 (b) occurs before the half-cycle deviation as shown in FIG. 11 (b). Confirmation can be made. For this reason, at that point in time, the viewer can take a countermeasure for the synchronization error (for example, canceling the appreciation), thereby avoiding a situation in which the health damage due to the synchronization error occurs at an earlier timing.

(When the synchronization status identification information cannot be visually recognized when synchronization is lost: Part 1)
Next, in FIG. 12, the light emitted from the light emitting unit 23 is not vertically polarized light but horizontally polarized light, the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, and the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a. Show. In addition, a waveform is shown in the case where the presentation control unit 12 causes the light emitting unit 23 to emit light by causing the light emitting unit 23 to emit light when the video output control unit 11 displays the left-eye video on the display 2. ing. However, in FIG. 12, the presentation period of the synchronization state identification information is shorter than the viewable time, which is the time during which the left-eye video can be viewed, and until the display of the left-eye video is stopped (from “ON”). It is a period until it falls to “OFF”. In the figure, the presentation period is about 1/12 period. Note that the display period of the parallax image and the open state period of the liquid crystal shutter 33 are substantially the same.

  In other words, the presentation control unit 12 determines that the presentation period in which the synchronization state identification information is presented is a viewable time in which the liquid crystal shutter glasses 3 can view the parallax image in any of the left and right eyes of the viewer. Also, the presentation of the synchronization state identification information (for example, the light emission of the light emitting unit 23) is controlled so as to be shorter. In this case, since the presentation period of the synchronization status identification information is short, it becomes difficult for the viewer to confirm the synchronization status identification information. Therefore, it is preferable to make the confirmation easy by increasing the light emission intensity (luminance) of the light emitting unit 23, for example.

  As shown in FIG. 12A, when there is no synchronization shift, the left-eye liquid crystal shutter 331 having the horizontal polarizing plate 101a is in an open state while the left-eye video is displayed on the display 2, so that the viewer can During the viewing of the stereoscopic image, the laterally polarized light emitted from the light emitting unit 23 can be visually recognized with the left eye. That is, in FIG. 12, the viewer can determine that there is no synchronization shift when the synchronization status identification information can be confirmed.

  On the other hand, FIG. 12B shows a case where a synchronization shift (synchronization shift amount is about 1/8 cycle) occurs in which the synchronization shift amount is smaller than a half cycle. In this case, the left-eye liquid crystal shutter 331 is in the closed state during the shaded period in FIG. 6 in which the left-eye image is displayed and the light-emitting unit 23 is in the light-emitting state. For this reason, the viewer will not be able to confirm the laterally polarized light emitted from the light emitting unit 23 that has been confirmed when there is no synchronization error, and the synchronization error will occur. Can be recognized.

  That is, as described above, the synchronization state identification information can be confirmed when there is no synchronization shift, and the light emission period of the light emitting unit 23 substantially matches the display period of the left-eye video or the right-eye video. In this case, it is possible to confirm that a synchronization shift has occurred only when a half-cycle shift occurs (for example, when the left-eye video cannot be confirmed with the left eye and can be confirmed with the right eye). However, as shown in FIG. 12B, even when the light emission state by the light emitting unit 23 can be visually recognized when there is no synchronization deviation, the light emission period is shortened so that the synchronization deviation is less than a half cycle. Even if there is, it is possible to make the viewer recognize the synchronization shift.

  In this case, while the right-eye video is being displayed, the right-eye liquid crystal shutter 332 is open and the left-eye liquid crystal shutter 331 is closed, and the right-eye video can be viewed only by the right eye. That is, although there is a slight synchronization shift, the above-described crosstalk does not occur in the right-eye video. However, in the case of the left-eye video, the timing between the end of the display of the left-eye video (when the “video display” falls) and the start of the opening operation of the right-eye liquid crystal shutter 332 (when the “right-eye shutter” rises) is slightly Crosstalk occurs because of the overlap. For this reason, by making the viewer recognize the synchronization shift as described above, it is possible to recognize that there is a possibility of suffering health damage due to crosstalk caused by the slight overlap. Further, in the case of adjusting the synchronization shift, it is possible to adjust the display timing and the opening / closing timing more closely by using the recognized small synchronization shift amount.

(When the synchronization status identification information becomes invisible when synchronization is lost: Part 2)
FIG. 13 also shows a case where the light emitted from the light emitting unit 23 is not polarized light but is horizontally polarized light, the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, and the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a. Yes. In addition, a waveform is shown in the case where the presentation control unit 12 causes the light emitting unit 23 to emit light by causing the light emitting unit 23 to emit light when the video output control unit 11 displays the left-eye video on the display 2. ing. In FIG. 13, the presentation period of the synchronization state identification information is shorter than the visible time which is the time during which the left-eye video is visible, and is near the center of the left-eye video display period. In the figure, the presentation period is about 1/12 period.

  Furthermore, in FIG. 13, the open state period of the liquid crystal shutter 33 is set shorter than the display period of the parallax image. That is, the shutter control unit 32 controls the opening / closing operation of the liquid crystal shutter 33 so that the open state period is shorter than the display period. This is because crosstalk is likely to occur when the display period of the parallax image and the open state period of the liquid crystal shutter 33 substantially coincide. For this reason, for example, also in FIGS. 10 to 12, it is preferable to perform opening / closing control of the liquid crystal shutter 33 as shown in FIG. 13 if it is considered to reduce the possibility of crosstalk as much as possible.

  As shown in FIG. 13A, when there is no synchronization shift, the left-eye liquid crystal shutter 331 having the horizontal polarizing plate 101a is in the open state while the left-eye video is displayed on the display 2, so that the viewer can During the viewing of the stereoscopic image, the laterally polarized light emitted from the light emitting unit 23 can be visually recognized with the left eye. That is, in FIG. 13, the viewer can determine that there is no synchronization error when the synchronization status identification information can be confirmed.

  On the other hand, FIG. 13B shows a case in which a synchronization shift (synchronization shift amount is about 1/8 cycle) occurs in which the synchronization shift amount is smaller than a half cycle. In this case, the left-eye liquid crystal shutter 331 is in the closed state (the state of transition to the closing operation) in the shaded period in FIG. 6 in which the left-eye image is displayed and the light-emitting unit 23 is in the light-emitting state. . For this reason, the viewer can hardly confirm the laterally polarized light emitted from the light-emitting unit 23 that has been confirmed when there is no synchronization error, because the synchronization error has occurred. It can be recognized that it occurred.

  In this case, while the left-eye video is being displayed, the left-eye liquid crystal shutter 331 is open and the right-eye liquid crystal shutter 332 is closed, so that the left-eye video can be viewed only by the left eye. Similarly, while the right-eye video is being displayed, the right-eye video can be viewed only with the right eye. That is, although a slight synchronization shift has occurred, no crosstalk has occurred, and it can be said that 3D video can be viewed in a normal state. However, even in such a state, there is a possibility that the display control device 1 or the liquid crystal shutter glasses 3 has a failure, and if it is used as it is, it is expected that crosstalk will eventually occur. The

  In the present embodiment, even if there is a possibility of failure as shown in FIG. 13B and there is a possibility that crosstalk is likely to occur, the viewer can view the stereoscopic video. It is possible to recognize that the synchronization error has occurred during the viewing. For this reason, the viewer can recognize the failure as soon as possible, and can prevent the health damage that can be caused when using the device while it is broken.

(Other configurations for checking synchronization status)
Further, in the present embodiment, the synchronization state identification information is presented when the parallax image is displayed. However, for example, as shown in FIG. 14, even if the configuration is presented when the parallax image is not displayed. Good. 14 also shows a case where the light emitted from the light emitting unit 23 is horizontally polarized light, the right-eye liquid crystal shutter 332 includes the vertical polarizing plate 101b, and the left-eye liquid crystal shutter 331 includes the horizontal polarizing plate 101a.

  In this case, as shown in FIG. 14 (a), when there is no synchronization shift, both the left-eye liquid crystal shutter 331 and the right-eye liquid crystal shutter 332 are in the closed state. The synchronization status identification information cannot be confirmed. On the other hand, as shown in FIG. 14B, when there is a synchronization error, the left-eye liquid crystal shutter 331 is open during the shaded period in FIG. For this reason, the viewer can confirm the laterally polarized light emitted from the light emitting unit 23 that could not be confirmed when there was no synchronization shift, by the occurrence of the synchronization shift. That is, even when the synchronization state identification information is presented when the parallax image is not displayed, the viewer can be made to recognize that a synchronization shift has occurred as in the case of FIGS.

  Further, since the synchronization state identification information is presented when the parallax image is not displayed, the viewer can recognize the synchronization shift from the initial stage of the synchronization shift. For this reason, the viewer can also confirm how the synchronization shift occurs when viewing the stereoscopic video.

[Other configurations]
For example, an application or content (left-eye video and right-eye video) prepared by a disk supplier may be recorded on an optical disk that can be played back by the recording / playback apparatus 4 (or display control apparatus 1). In this case, the display control apparatus 1 can display the content reproduced by the recording / reproducing apparatus 4 (or the display control apparatus 1) on the display 2. In addition, the optical disc may include a program for adjusting the synchronization deviation. In this case, by causing the presentation control unit 12 to execute the program by the operation of the viewer when the synchronization deviation occurs, The synchronization adjustment method and the like can be displayed on the display 2.

  The optical disk is, for example, an optical disk of DVD standard or Blu-ray (registered trademark) standard, and is a recordable disk of DVD standard (DVD-R / DVD-RW / DVD-RAM / DVD-R DL). CPRM compatible discs and DVD-ROM discs, Blu-ray standard recording discs (BD-RE, BD-R) and BD-ROM discs can be used. For example, when the optical disc is a Blu-ray standard optical disc, the optical disc includes a read-only recording layer as a ROM (Read Only Memory) layer and a rewritable recording layer as an RE (RE-writable) layer. Further, the recordable recordable layer is an R (Recordable) layer. As long as at least the ROM layer is provided, it does not matter whether the layer is a single layer or a multilayer, or how these layers are stacked in combination.

  Further, a synchronization state identification information presentation mode may be provided so that the synchronization state identification information is not presented by a remote controller or the like. At this time, the synchronization state identification information can be presented at a timing desired by the viewer, or the synchronization state identification information can not be presented.

[Another expression of the present invention]
The present invention can also be expressed as follows.

  That is, the stereoscopic video display device according to the present invention includes a display switching unit that alternately displays a left-eye video and a right-eye video, and a synchronization signal transmission unit that transmits a signal for synchronizing with the display switching. A stereoscopic video display device that allows a viewer to view a stereoscopic video through a visual switching mechanism that switches between right and left eye viewing approval or synchronization synchronized with display screen switching by a synchronization signal, and is synchronized with the display switching period of the display switching means Identifier display means for displaying the identification signal, and the identifier display means is configured to display an identification signal that can be recognized only to either the left or right eye via the visual switching mechanism.

  The stereoscopic image display device according to the present invention can use the glasses with liquid crystal shutters having different polarization characteristics as the viewing switching mechanism in the left-eye lens unit and the right-eye lens unit, respectively. In the described stereoscopic video display device, the identifier display means preferably outputs a signal having a specific polarization characteristic.

  The stereoscopic image display device according to the present invention can use the glasses with liquid crystal shutters having different polarization characteristics as the viewing switching mechanism in the left-eye lens unit and the right-eye lens unit, respectively. Preferably, the identifier display means outputs a signal having a specific wavelength characteristic.

  In the stereoscopic video display device according to the present invention, it is preferable that the identifier display unit displays a synchronization signal transmitted by the synchronous transmission unit and an identifier in which a visual approval rejection state of the visual switching mechanism is reversed.

[Supplement]
Finally, each block of the display control device 1, in particular, the video output control unit 11, the presentation control unit 12, and the synchronization signal output control unit 13 of the control unit 10 may be configured by hardware logic, as follows: You may implement | achieve by software using CPU. Each block of the liquid crystal shutter glasses 3, particularly the synchronization adjustment unit 321 and the shutter opening / closing control unit 322 of the shutter control unit 32, may be configured by hardware logic, or realized by software using a CPU as follows. May be.

  That is, the display control device 1 and the liquid crystal shutter glasses 3 include a CPU (central processing unit) that executes instructions of a control program for realizing each function, a ROM (read only memory) that stores the program, and a RAM that expands the program (Random access memory), a storage device (recording medium) such as a memory for storing the program and various data. The object of the present invention is to enable the computer to read program codes (execution format program, intermediate code program, source program) of the control program for the display control device 1 and the liquid crystal shutter glasses 3 which are software for realizing the above-described functions. This can also be achieved by supplying the recorded recording medium to the display control device 1 and the liquid crystal shutter glasses 3, and the computer (or CPU or MPU) reading and executing the program code recorded on the recording medium. .

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and a compact disk-ROM / MO / MD / digital video disk / compact disk-R. A disk system including an optical disk, a card system such as an IC card (including a memory card) / optical card, or a semiconductor memory system such as a mask ROM / EPROM / EEPROM / flash ROM can be used.

  Further, the display control device 1 and the liquid crystal shutter glasses 3 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The display control device of the present invention can suppress health damage during viewing of stereoscopic images, and is particularly suitable for a liquid crystal display device capable of outputting stereoscopic images or a self-luminous display device such as plasma. Can be applied.

1. Display control device (display device)
2 Display (display device)
3 LCD shutter glasses (visual switching mechanism, shutter glasses)
7 3D video viewing system (stereoscopic video viewing system)
11 Video output control unit (video output control means)
12 presentation control unit (presentation control means)
23 Light emitting part (light emitting means)
101a Transverse polarizing plate (first polarizing plate, second polarizing plate)
101b Vertical polarizing plate (second polarizing plate, first polarizing plate)
108a Optical filter for left eye (first optical filter, second optical filter)
108b Optical filter for right eye (second optical filter, first optical filter)
331 Left-eye liquid crystal shutter (first parallax video display shutter, second parallax video display shutter)
332 Liquid crystal shutter for right eye (second parallax video display shutter, first parallax video display shutter)

Claims (14)

  1. A display control device that displays parallax images using the parallax of the left and right eyes of a viewer on a display and allows a viewer to view a stereoscopic video through a visual switching mechanism that switches between right and left eye viewing approval / disapproval.
    Either the first parallax image for allowing the viewer to visually recognize through one eye or the second parallax image for allowing the viewer to visually recognize through the other eye, which are the parallax images, is displayed on the display. Presentation control means for presenting synchronization state identification information that is recognizable by any one of the viewers and is information for identifying the synchronization state between the display timing and the switching timing of the visual approval rejection of the visual switching mechanism. A display control apparatus comprising:
  2. The visual switching mechanism includes a first parallax video display shutter and a second parallax video display shutter for viewing the parallax video in each of the left and right eyes of the viewer,
    The difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to light in a specific polarization state is recognizable to the viewer.
    The presentation control means controls the presence / absence of the emitted light in the light emitting means for emitting the light of the specific polarization state as the emitted light, thereby causing the synchronization state identification information to be presented. The display control apparatus according to 1.
  3. The visual switching mechanism includes a first parallax video display shutter and a second parallax video display shutter for viewing the parallax video in each of the left and right eyes of the viewer,
    The difference between the transmission state of the first parallax image display shutter and the transmission state of the second parallax image display shutter with respect to light having specific optical characteristics is recognizable to the viewer.
    The presentation control means causes the synchronization state identification information to be presented by controlling whether or not the emitted light is emitted by a light emitting means for emitting light having the specific optical characteristic as emitted light. The display control apparatus according to 1.
  4. Video output control means for displaying the parallax video on the display;
    The presentation control means includes
    While the video output control means is displaying the first parallax video on the display, it can be recognized by the other eye that visually recognizes the second parallax video, or
    While the video output control means is displaying the second parallax video on the display, the synchronization status identification information is presented so that the first parallax video can be recognized by the one eye. The display control device according to claim 1, wherein the display control device is a display control device.
  5. Shutter glasses as the visual switching mechanism used together with the display control device according to claim 2,
    The first parallax image display shutter has a first polarizing plate,
    The second parallax image display shutter has a second polarizing plate,
    The shutter glasses, wherein the transmittance of the first polarizing plate with respect to the emitted light is higher than the transmittance of the second polarizing plate with respect to the emitted light.
  6. Shutter glasses as the visual switching mechanism used together with the display control device according to claim 3,
    The first parallax image display shutter has a first optical filter,
    The second parallax video display shutter has a second optical filter;
    The shutter glasses, wherein the transmittance of the first optical filter with respect to the emitted light is higher than the transmittance of the second optical filter with respect to the emitted light.
  7. The display used with the display control device according to claim 2,
    The viewer can recognize both the first parallax video display shutter and the second parallax video display shutter with light having a polarization state different from the polarization state of the outgoing light emitted by the light emitting means. A display characterized in that the parallax image is displayed by emitting light that passes through to a certain extent.
  8.   A control program for operating the display control device according to any one of claims 1 to 4, wherein the control program causes a computer to function as each of the above means.
  9.   A computer-readable recording medium in which the control program according to claim 8 is recorded.
  10. A control method of a display control device for displaying a parallax image using parallax of left and right eyes of a viewer on a display and allowing a viewer to view a three-dimensional video via a visual switching mechanism that switches between right and left eye viewing approval / disapproval. ,
    Either the first parallax image for allowing the viewer to visually recognize through one eye or the second parallax image for allowing the viewer to visually recognize through the other eye, which are the parallax images, is displayed on the display. A presentation control step for presenting synchronization state identification information recognizable by any one eye of the viewer, and information for identifying the synchronization state between the display timing and the switching timing of the visual recognition rejection of the visual switching mechanism A display control apparatus control method comprising:
  11. A display control device according to any one of claims 1 to 4,
    A display device comprising: the display control device; and the display for displaying the parallax image.
  12. A display control device according to claim 2;
    A display device comprising: the display according to claim 7.
  13. A display control device according to claim 2;
    A stereoscopic video viewing system comprising the shutter glasses according to claim 5.
  14. A display control device according to claim 3;
    A stereoscopic video viewing system comprising the shutter glasses according to claim 6.
JP2010244568A 2010-10-29 2010-10-29 Display controller, shutter glasses, display, control program, computer readable recording medium, control method of display controller, display device, and stereoscopic video appreciation system Withdrawn JP2012099965A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012235295A (en) * 2011-04-28 2012-11-29 Casio Comput Co Ltd Projection apparatus, projection method and program
CN104539933A (en) * 2014-12-30 2015-04-22 北京奇艺世纪科技有限公司 Stereoscopic video playing method and system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012235295A (en) * 2011-04-28 2012-11-29 Casio Comput Co Ltd Projection apparatus, projection method and program
CN104539933A (en) * 2014-12-30 2015-04-22 北京奇艺世纪科技有限公司 Stereoscopic video playing method and system

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