JP2012231212A - Stereoscopic video display system, stereoscopic video display device, and stereoscopic video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily restrain cross-talk while maintaining an amount of light of a video.SOLUTION: A stereoscopic video display device 110 comprises a video display part 156 for alternately displaying a video for a right eye and a video for a left eye; a control output part 158 for outputting control signals controlling opening/closing timings of right and left shutters of shutter spectacles 120; and a light emission control part 160 for emitting light at a light emission part 162 during a complete shading period Ps for closing both of the right and left shutters based on the control signals. The shutter spectacles comprise a shutter 228 for a right eye; a shutter 230 for a left eye; a shutter control part 222 for controlling opening/closing timings of the shutter for the right eye and the shutter for the left eye according to the acquired control signals; and an offset setting part 226 for setting offset of the opening/closing timings controlled by the shutter control part according to a user operation.

Description

  The present invention relates to a stereoscopic video display system, a stereoscopic video display device, and a stereoscopic video display method that allow a stereoscopic video to be perceived through shutter glasses.

  In recent years, on the video display unit, the left and right video data (right-eye video data and left-eye video data) having binocular parallax are alternately displayed in a predetermined frame period, and the user wearing the shutter glasses On the other hand, stereoscopic video technology that perceives stereoscopic video is in the spotlight.

  The shutter glasses have two shutters that open and close in synchronization with a predetermined frame period of video data. Then, during the period in which the right-eye video is displayed on the video display unit, the right-eye shutter is opened and the left-eye shutter is closed. On the other hand, during the period when the left-eye video is displayed on the video display unit, the left-eye shutter is opened and the right-eye shutter is closed.

  In order to synchronize the opening / closing cycle of the shutter and the frame cycle of the two video data displayed on the video display unit, the shutter glasses are connected to the shutter glasses by wireless communication such as wired communication or infrared from the video display device or the video reproduction device. A means for transmitting a shutter opening / closing signal and opening / closing the shutter according to the opening / closing signal received by the shutter glasses is conceivable (for example, Patent Document 1).

JP-A-6-178325

  In such stereoscopic image technology using shutter glasses, even if synchronization processing is appropriate, a part of the light of the right-eye image is transmitted to the user's left eye due to delays of individual devices, shutter driving devices, and the like. In some cases, so-called crosstalk occurs in which part of the light of the left-eye image enters the right eye of the user.

  At this time, it is possible to prevent crosstalk by simply lengthening the period for closing both the right-eye shutter and the left-eye shutter. However, since the amount of light reaching the user's eyes is reduced accordingly, the image becomes dark. In this case, in order to maintain the light amount, the power of the panel backlight or the like must be increased, leading to an increase in power consumption. Further, when the amount of crosstalk generated is small, the user cannot grasp even that the crosstalk has occurred, and continues to view the video without noticing the occurrence of the crosstalk.

  Therefore, in view of such problems, the present invention provides a stereoscopic video display system, a stereoscopic video display device, and a stereoscopic video display method capable of easily suppressing crosstalk while maintaining the amount of video light. It is an object.

  In order to solve the above problems, a stereoscopic video display system according to the present invention includes a stereoscopic video display device that perceives a stereoscopic video and shutter glasses worn by a user when perceiving the stereoscopic video. A video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax, a control output unit that outputs a control signal for controlling the open / close timing of the left and right shutters of the shutter glasses, and a control signal And a light emission control unit that causes the light emitting unit to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed, and when the shutter glasses wear the shutter glasses, the right eye of the user A right-eye shutter that opens and closes the optical path and a left-eye shutter that opens and closes the optical path when the user wears shutter glasses. A control acquisition unit that acquires a control signal, a shutter control unit that controls opening and closing timings of the right-eye shutter and the left-eye shutter according to the acquired control signal, and a shutter control unit according to a user operation And an offset setting unit that sets an offset of the controlled opening / closing timing.

  In order to solve the above-mentioned problem, another stereoscopic video display system of the present invention comprising a stereoscopic video display device for perceiving a stereoscopic video and shutter glasses worn by a user when perceiving the stereoscopic video is provided. The apparatus displays an image display unit that alternately displays a right-eye image and a left-eye image having horizontal parallax, and a left and right shutter glasses based on a control signal that controls opening and closing timings of the left and right shutters of the shutter glasses. A light emission control unit that causes the light emission unit to emit light over a complete light shielding period in which both shutters are closed and further includes a control signal in the emitted light, and the shutter glasses are worn by the user by the shutter glasses A right-eye shutter that opens and closes the optical path positioned in front of the user's right eye, and when the user wears shutter glasses, the optical path is opened and closed positioned in front of the user's left eye An eye shutter, a light receiving detection unit that receives and detects light emitted from the light emitting unit, a control derivation unit that derives a control signal based on the detected light, and for the right eye according to the derived control signal A shutter control unit that controls the opening and closing timings of the shutter and the left-eye shutter, and an offset setting unit that sets an offset of the opening and closing timing controlled by the shutter control unit according to a user operation.

  In order to solve the above problems, a stereoscopic video display apparatus according to the present invention includes a video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax, and opening and closing of left and right shutters of shutter glasses. A control output unit that outputs a control signal for controlling timing, and a light emission control unit that causes the light emitting unit to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed based on the control signal. Features.

  In order to solve the above-described problems, another stereoscopic image display device of the present invention includes a video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax, and left and right shutters of shutter glasses. A light-emission control unit that causes the light-emitting unit to emit light over a complete light-shielding period in which both the left and right shutters of the shutter glasses are closed based on a control signal that controls the opening and closing timing of the shutter glasses, and further includes a control signal in the emitted light It is characterized by providing.

  In order to solve the above-described problem, the stereoscopic image display method of the present invention alternately displays a right-eye image and a left-eye image having horizontal parallax, and controls the open / close timing of the left and right shutters of the shutter glasses. A control signal is output, and the light emitting unit is caused to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed based on the control signal.

  In order to solve the above-described problem, another stereoscopic image display method of the present invention alternately displays a right-eye image and a left-eye image having a horizontal parallax, and sets the open / close timings of the left and right shutters of the shutter glasses. Based on the control signal to be controlled, the light emitting unit emits light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed, and the control signal is included in the emitted light.

  According to the present invention, it is possible to easily suppress crosstalk while maintaining the amount of video.

It is explanatory drawing which showed the schematic connection relation of the three-dimensional video display system in 1st Embodiment. It is the functional block diagram which showed the schematic function of the three-dimensional video display apparatus in 1st Embodiment. It is a functional block diagram showing a schematic function of shutter glasses in the first embodiment. It is explanatory drawing for demonstrating opening and closing of a shutter, and crosstalk. It is explanatory drawing for demonstrating opening and closing of a shutter, and crosstalk. It is explanatory drawing for demonstrating opening and closing of a shutter, and crosstalk. It is explanatory drawing for demonstrating the light emission timing of the light emission part in 1st Embodiment. It is the flowchart which showed the whole flow of the three-dimensional video display method in 1st Embodiment. It is explanatory drawing which showed the schematic connection relation of the body image display system in 2nd Embodiment. It is the functional block diagram which showed the schematic function of the stereoscopic video display apparatus in 2nd Embodiment. It is a functional block diagram showing a schematic function of shutter glasses in the second embodiment. It is explanatory drawing for demonstrating the light emission timing of the light emission part in 2nd Embodiment. It is the flowchart which showed the whole flow of the stereo image display method in 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiment are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment: stereoscopic image display system 100)
FIG. 1 is an explanatory diagram showing a schematic connection relationship of the stereoscopic video display system 100 according to the first embodiment. As shown in FIG. 1, the stereoscopic video display system 100 includes a video playback device 102, a stereoscopic video display device 110, and shutter glasses 120.

  The video playback apparatus 102 converts stereoscopic video data (right-eye video data and left-eye video data), which are two video data having binocular parallax, into side-by-side, top-and-bottom, line-by-line, and frame sequential. The image is output to the stereoscopic image display device 110 by a predetermined method for perceiving a stereoscopic image such as a method.

  The stereoscopic video display device 110 is, for example, a plasma panel display device, and displays stereoscopic video data output from the video reproduction device 102 alternately for right-eye video and left-eye video for each frame. Then, the image is displayed on its own video display unit in a frame sequential manner to be visually recognized through the shutter glasses 120.

  In the present embodiment, the stereoscopic image display device 110 is a plasma panel method, but is not limited to this, and may be a liquid crystal panel method. In that case, the stereoscopic video display device 110 may use a one-time writing process that alternately displays a right-eye video and a left-eye video for each frame, or a right-eye video and a left-eye video, for example. You may use the process of writing twice which displays the image | video for 2 times continuously each. In addition, the stereoscopic image display apparatus 110 can apply various existing processes corresponding to the frame sequential method.

  When the user 130 wears the shutter glasses 120, the shutter glasses 120 are positioned between the stereoscopic video display device 110 and the eyes of the user 130, and the right-eye video and the left-eye video displayed by the stereoscopic video display device 110 are displayed. The right-eye shutter and the left-eye shutter are opened and closed at a period synchronized with the frame period.

  Next, specific configurations of the stereoscopic image display device 110 and the shutter glasses 120 will be described.

(3D image display device 110)
FIG. 2 is a functional block diagram illustrating a schematic function of the stereoscopic video display device 110 according to the first embodiment. As shown in FIG. 2, the stereoscopic video display device 110 includes a data acquisition unit 150, a buffer memory 152, a display data generation unit 154, a video display unit 156, a control output unit 158, a light emission control unit 160, And a light emitting unit 162.

  The data acquisition unit 150 generates stereoscopic video data (right-eye video data and left-eye video data) that is data for forming a right-eye video and a left-eye video for perceiving a stereoscopic video, for example, a video playback device. 102.

  The buffer memory 152 includes a RAM, a flash memory, an HDD, and the like, and temporarily holds the stereoscopic video data acquired by the data acquisition unit 150.

  The display data generation unit 154 sequentially reads stereoscopic video data from the buffer memory 152, and generates display data of a frame sequential method.

  The video display unit 156 is constituted by, for example, a plasma panel, and alternately displays a right-eye video and a left-eye video having horizontal parallax for each frame based on display data.

  Based on the frame period of the display data, the control output unit 158 generates a control signal that controls the open / close timing of the left and right shutters (the right-eye shutter 228 and the left-eye shutter 230 described later) of the shutter glasses 120, The data is output to the shutter glasses 120 through wireless communication such as infrared data of IrDA (Infrared Data Association) standard. Further, the control output unit 158 may output a control signal to the shutter glasses 120 through wired communication.

  This control signal indicates the opening / closing timing of the shutter of the shutter glasses 120 that is offset forward by a delay amount in consideration of, for example, a transmission delay to the shutter glasses 120 and an operation delay of opening / closing the shutter of the shutter glasses 120. By this control signal, a complete light shielding period in which both the left and right shutters of the shutter glasses 120 are closed is specified. The complete light shielding period will be described in detail later.

  The light emission control unit 160 derives a complete light shielding period based on the control signal, and causes the light emitting unit 162 to emit light over the complete light shielding period.

  The light emitting unit 162 is configured by, for example, an LED, a miniature light bulb, a neon light, and the like, and emits visible light according to the control of the light emission control unit 160.

(Shutter glasses 120)
FIG. 3 is a functional block diagram illustrating a schematic function of the shutter glasses 120 according to the first embodiment. As shown in FIG. 3, the shutter glasses 120 include a control acquisition unit 220, a shutter control unit 222, an operation unit 224, an offset setting unit 226, a right eye shutter 228, and a left eye shutter 230. Consists of.

  The control acquisition unit 220 acquires the control signal generated by the control output unit 158. The shutter control unit 222 controls the opening / closing timing of the right-eye shutter 228 and the left-eye shutter 230 according to the control signal acquired by the control acquisition unit 220.

  The operation unit 224 receives an operation input from the user 130. The offset setting unit 226 sets an offset of the opening / closing timing controlled by the shutter control unit 222 according to the operation input of the user 130 through the operation unit 224.

  When the user 130 wears the shutter glasses 120, the right-eye shutter 228 is positioned in front of the right eye and opens and closes an optical path incident on the right eye. When the user 130 wears the shutter glasses 120, the left-eye shutter 230 is positioned in front of the left eye and opens and closes an optical path incident on the left eye.

  The configuration of the stereoscopic image display device 110 and the shutter glasses 120 has been described above. Next, the shutter opening / closing process will be described, and the characteristic timing adjustment process in the present embodiment will be described in detail.

(Shutter opening / closing process)
4 to 6 are explanatory diagrams for explaining opening / closing of the shutter and crosstalk. 4A and 4B show the case of the plasma panel system, FIG. 5 shows the case of the liquid crystal panel system that performs the process of writing once, and FIG. 6 shows the case of the liquid crystal panel system that performs the process of writing twice. Respectively. In the following drawings, R indicates a frame for the right eye video, and L indicates a frame for the left eye video.

  4 to 6, the application timing of the right-eye video signal (signal application (R)), the application timing of the left-eye video signal (signal application (L)), the right-eye video, and The relationship between the display timing of the video for the left eye, the opening / closing timing of the shutter for the right eye, the timing for viewing the video by the right eye, the timing for opening / closing the shutter for the left eye, and the timing for viewing the video by the left eye is shown.

  Here, the respective timings are approximate, and actually, for example, in the case of the liquid crystal panel system of FIGS. 5 and 6, there is a delay from signal application to video display. In some cases, the period during which crosstalk is allowed and the shutter is open is made wider than that shown in FIGS.

  First, shutter opening / closing and crosstalk in the plasma panel system will be described with reference to FIG. For example, as shown in FIG. 4B, the opening and closing of the right-eye shutter and the opening and closing of the left-eye shutter are performed simultaneously and in opposite phases, and the right-eye video is displayed to the user for the right eye. Assume that the left eye visually recognizes the video for the left eye.

  However, when the shutter opening / closing cycle and the phase of the frame cycle of the right-eye video and the left-eye video displayed on the video display unit are not appropriate, or when the control signal controls the shutter opening / closing timing, the shutter When the opening / closing operation speed is not sufficient due to the type of shutter glasses, individual differences, deterioration, or the like, crosstalk occurs.

  For example, if the right-eye shutter is opened during the period when the right-eye shutter is closed and the left-eye image next to the right-eye image is displayed, the user can The video for the left eye and the video for the right eye are continuously viewed across the black screen in the video blanking period B, which is a period during which the image is displayed, and crosstalk occurs. Similarly, if the timing for closing the left-eye shutter is delayed for the left eye, crosstalk occurs.

  Therefore, as shown in FIG. 4A, for example, at the timing corresponding to the video blanking period B, a complete light blocking period Ps for closing both the right eye shutter and the left eye shutter is provided to suppress crosstalk. Means are conceivable.

  Still, the timing x for closing the right-eye shutter is delayed beyond the period that should be the complete light-shielding period Ps (originally the timing for closing the right-eye shutter and then opening the left-eye shutter). If this happens, crosstalk will occur as well.

  Next, the opening / closing of the shutter and the crosstalk in the liquid crystal panel method in which the writing process is performed once will be described with reference to FIG. In the liquid crystal panel method, unlike the plasma panel method, the frame is rewritten sequentially from the upper line to the lower line in the video display unit.

  Therefore, at the transition between the right-eye video and the left-eye video, as shown in FIG. 5, a part of the right-eye video and a part of the left-eye video (for example, the upper part of the video display unit are rewritten). There is a transition period B ′ in which a new right-eye video frame and an old left-eye video frame before rewriting are simultaneously displayed at the bottom of the video display unit. When the user visually recognizes the video during the transition period B ′, crosstalk occurs.

  Next, the opening / closing of the shutter and the crosstalk in the liquid crystal panel method that performs the double writing process will be described with reference to FIG. Also in this liquid crystal panel method, as in the liquid crystal panel method in which the writing process is performed once, as shown in FIG. 6, there is a transition period B ′ in the transition between the right eye video and the left eye video. When the user visually recognizes the video during the transition period B ′, crosstalk occurs.

  Accordingly, in any liquid crystal panel method, a means for suppressing crosstalk by providing a complete light-shielding period Ps at a timing corresponding to the transition period B ′ can be considered. However, as in the case of the plasma panel method, when the shutter opening / closing cycle and the phase of the frame cycle are not appropriate, or the shutter opening / closing operation speed is not sufficient, crosstalk occurs.

  In both the plasma panel method and the two liquid crystal panel methods, this problem can be avoided by increasing the complete light shielding period Ps. However, since the amount of light reaching the user's eyes is reduced, the image becomes dark. In this case, in order to maintain the light amount, the power of the panel backlight or the like must be increased, resulting in an increase in power consumption.

  Therefore, in the stereoscopic image display apparatus 110 using the plasma panel of the present embodiment, a timing adjustment process for setting the complete light shielding period Ps so that the video blanking period B is inside the complete light shielding period Ps is performed.

(Timing adjustment process)
FIG. 7 is an explanatory diagram for explaining the light emission timing of the light emitting unit 162 according to the first embodiment. In FIG. 7, the application timing of the right-eye video signal (signal application (R)), the application timing of the left-eye video signal (signal application (L)), the right-eye video, and the left-eye video. In addition to the display timing, the right eye shutter opening / closing timing, the right eye viewing timing, the left eye shutter opening / closing timing, and the left eye viewing timing, the light emission timing of the light emitting unit 162 is shown.

  As described above, the control output unit 158 generates a control signal indicating the opening / closing timing that is offset in advance by a delay of the opening / closing operation of the shutter. Here, for example, as in FIG. 4A, the control output unit 158 generates a control signal for controlling the opening / closing timing of the shutter so that the video blanking period B and the complete light shielding period Ps coincide.

  The light emission control unit 160 derives a complete light shielding period Ps (start timing and end timing of the complete light shielding period Ps) before offsetting based on the control signal and the offset amount for the delay, and the complete light shielding period. The light emitting unit 162 emits light over Ps.

  Then, as shown in FIG. 7, the light emitting unit 162 is turned on (emits light) in the video blanking period B, and the light emitting unit 162 is turned off in other periods.

  When both the right-eye shutter 228 and the left-eye shutter 230 are always closed in the video blanking period B (when the video blanking period B is inside the complete light-shielding period Ps), the user Light (hereinafter referred to as reference light Lr) is not visually recognized.

  On the other hand, when there is a period in which at least one of the right-eye shutter 228 and the left-eye shutter 230 is open in the video blanking period B (when the video blanking period B is outside the complete light-shielding period Ps), the user The reference light Lr is visually recognized.

  Then, the user adjusts the opening / closing timings of the right-eye shutter 228 and the left-eye shutter 230 so that the reference light Lr is not visually recognized through the operation unit 224 of the shutter glasses 120.

  The offset setting unit 226 sets an opening / closing timing offset controlled by the shutter control unit 222 in response to a user operation input (user operation) through the operation unit 224. This offset can be set independently at each of four timings: the timing for opening and closing the right-eye shutter 228, and the timing for opening and closing the left-eye shutter 230.

  For example, the timing for opening and closing the right-eye shutter 228 may be adjusted in synchronization, and the timing for opening and closing the left-eye shutter 230 may be adjusted in synchronization.

  Then, the time during which the user opens the right eye shutter 228 and the left eye shutter 230 is maximized within a range where the reference light Lr is not visually recognized (so that the reference light Lr is not visually recognized). By setting the offset through the operation unit 224, it is possible to suppress the reduction in the light amount to the minimum while suppressing the crosstalk.

  In the present embodiment, the control output unit 158 generates the control signal so that the complete light shielding period Ps matches the video blanking period B. However, the control output unit 158 is not limited to such a case, and includes, for example, the video blanking period B, The control signal may be generated so that a period longer than the video blanking period B is set as the complete light shielding period Ps, or a period including the part of the video blanking period B and shorter than the video blanking period B is set as the complete light shielding period. The control signal may be generated so as to be Ps.

  Further, in the present embodiment, the case of the plasma panel method has been described as an example, but the present invention can also be applied to the two liquid crystal panel methods described above. For example, assume that the control output unit generates a control signal for controlling the opening / closing timing of the shutter so that the transition period B ′ and the complete light-shielding period Ps coincide with each other, as in FIGS. 5 and 6. The light emission control unit derives the complete light shielding period Ps before the offset by the delay based on the control signal and the offset amount advanced by the delay of the opening / closing operation of the shutter glasses 120, and the complete light shielding period Ps. The light emitting unit 162 is caused to emit light over a period of time. When the user visually recognizes the reference light Lr emitted from the light emitting unit 162, the user can easily grasp that crosstalk has occurred.

  In the case of adopting the liquid crystal panel method, the control output unit may generate a control signal including the transition period B ′ and a period longer than the transition period B ′ as the complete light shielding period Ps, or the transition period B ′. The control signal may be generated so that a period shorter than the transition period B ′ is included as a complete light shielding period Ps.

  In addition, a liquid crystal panel method for performing three-time writing or four-time writing processing and various other display methods can be employed. In any display method, the light emission control unit derives the complete light shielding period Ps using the shutter opening / closing timing indicated by the control signal, and causes the light emitting unit to emit light over the complete light shielding period Ps. Crosstalk can be easily suppressed by setting the offset.

(3D image display method)
Next, a stereoscopic video display method for displaying display data using the above-described stereoscopic video display device 110 will be described. FIG. 8 is a flowchart showing an overall flow of the stereoscopic image display method according to the first embodiment. The process shown in FIG. 8A is repeatedly executed at a predetermined frame period while the stereoscopic image display apparatus 110 is instructed to display the display data. Also, the process shown in FIG. 8B is repeatedly executed as an interrupt process, for example, as a parallel process of the process of FIG. 8A, with a period shorter than the frame period of the process of FIG.

  As shown in FIG. 8A, the data acquisition unit 150 acquires stereoscopic video data (S300). Then, the display data generation unit 154 generates frame sequential display data (S302). The video display unit 156 alternately displays the right-eye video and the left-eye video having horizontal parallax for each frame based on the display data (S304).

  In parallel with this video display processing, the light emission control unit 160 determines whether or not it is located in the complete light shielding period Ps as shown in FIG. 8B (S320). When it is the complete light shielding period Ps (YES in S320), the light emission control unit 160 causes the light emitting unit 162 to emit light (S322). If it is not the complete light shielding period Ps (NO in S320), the process is terminated as it is.

  This stereoscopic image display method can also easily suppress crosstalk while maintaining the amount of image light.

(Second Embodiment)
In the first embodiment described above, the stereoscopic video display system 100 in which the control output unit 158 outputs a control signal to the shutter glasses 120 by wireless communication or wired communication has been described. In the second embodiment, a stereoscopic image that can open and close the right-eye shutter 228 and the left-eye shutter 230 at a period synchronized with the frame period of the right-eye image and the left-eye image without providing the control output unit 158. The display system 400 will be described.

(3D image display system 400)
FIG. 9 is an explanatory diagram showing a schematic connection relationship of the stereoscopic video display system 400 according to the second embodiment. As shown in FIG. 9, the stereoscopic video display system 400 includes a video playback device 102, a stereoscopic video display device 410, and shutter glasses 420.

  Similar to the first embodiment, the video playback device 102 outputs stereoscopic video data to the stereoscopic video display device 410 in a predetermined manner. The stereoscopic video display device 410 displays a video based on the stereoscopic video data output from the video playback device 102 on its own video display unit in a frame sequential manner. When the user wears the shutter glasses 420, the shutter glasses 420 are positioned between the stereoscopic video display device 410 and the eyes of the user 130, and the right-eye video and the left-eye video displayed by the stereoscopic video display device 410 are displayed. The right-eye shutter 228 and the left-eye shutter 230 are opened and closed at a period synchronized with the frame period.

  Next, specific configurations of the stereoscopic image display device 410 and the shutter glasses 420 will be described.

(3D image display device 410)
FIG. 10 is a functional block diagram illustrating a schematic function of the stereoscopic video display device 410 according to the second embodiment. As shown in FIG. 10, the stereoscopic video display device 410 includes a data acquisition unit 150, a buffer memory 152, a display data generation unit 154, a video display unit 156, a light emission control unit 430, and a light emission unit 162. Consists of. Since the data acquisition unit 150, the buffer memory 152, the display data generation unit 154, the video display unit 156, and the light emitting unit 162, which have already been described as constituent elements in the first embodiment, have substantially the same functions, they overlap. Description is omitted.

  Based on the control signal, the light emission control unit 430 derives a complete light shielding period Ps in which both the left and right shutters of the shutter glasses 420 are closed, causes the light emitting unit 162 to emit light over the complete light shielding period Ps, and further emits light. A control signal is included (superimposed) on the light (reference light Lr).

(Shutter glasses 420)
FIG. 11 is a functional block diagram illustrating a schematic function of the shutter glasses 420 according to the second embodiment. As illustrated in FIG. 11, the shutter glasses 420 include a light reception detection unit 450, a control derivation unit 452, a shutter control unit 222, an operation unit 224, an offset setting unit 226, a right-eye shutter 228, and a left-eye. And a shutter 230 for use. The shutter control unit 222, the operation unit 224, the offset setting unit 226, the right-eye shutter 228, and the left-eye shutter 230 that have already been described as the components in the first embodiment have substantially the same functions. Therefore, duplicate explanation is omitted.

  The light receiving detection unit 450 receives and detects light (reference light Lr) emitted from the light emitting unit 162 of the stereoscopic image display device 410. The control deriving unit 452 derives a control signal based on the reference light Lr.

  The configuration of the stereoscopic image display device 410 and the shutter glasses 420 has been described above. Subsequently, a light emission control process characteristic of the present embodiment will be described in detail.

(Light emission control processing)
The light emission control unit 430 causes the reference light Lr to blink in a time-sharing manner within the complete light shielding period Ps while causing the light emitting unit 162 to emit light over the complete light shielding period Ps. By blinking the reference light Lr, a control signal is included in the reference light Lr.

  FIG. 12 is an explanatory diagram for explaining the light emission timing of the light emitting unit 162 according to the second embodiment. As shown in FIG. 12, the reference light Lr blinks within the complete light shielding period Ps. Here, a control signal is represented by a period x in which the reference light Lr is lit for a long period and a period y in which the reference light Lr is lit for a short period.

  In FIG. 12, when the period x comes first and the period y comes later, the next frame of the video blanking period B is the right-eye video, and the left-eye shutter 230 is closed and the right-eye video is left. A control signal for opening the shutter 228 is shown.

  When the period y is first and the period x is later, the next frame of the video blanking period B is the left-eye video, the right-eye shutter 228 is closed, and the left-eye shutter 230 is closed. The control signal that opens is shown.

  For example, in the video blanking period B, the control derivation unit 452 determines that the light reception detection unit 450 has received the reference light Lr beyond the short period y, that is, the long period x. This frame is determined to be a right-eye image, and after the current complete light blocking period Ps, the shutter controller 222 is instructed to open the right-eye shutter 228 while the left-eye shutter 230 is closed.

  The control deriving unit 452 determines that the next frame is an image for the left eye when the light receiving detection unit 450 determines that the reference light Lr is not received in the short period y in the video blanking period B. Then, after the current complete light blocking period Ps, the shutter control unit 222 is instructed to open the left eye shutter 230 while the right eye shutter 228 is closed.

  Further, the control deriving unit 452 instructs the shutter control unit 222 to open the shutter for both the right-eye shutter 228 and the left-eye shutter 230 and then instructs the shutter control unit 222 to close the shutter when a predetermined time has elapsed. This is performed on the shutter control unit 222.

  In this way, in the stereoscopic video display system 400, a control signal for controlling the opening / closing timing of the shutter can be included in the reference light Lr without providing a dedicated functional unit such as wireless communication or wired communication.

  The waveform of the reference light Lr shown in FIG. 12 is an example, and if a control signal can be included, the reference light Lr such as a waveform different from FIG. 12, for example, a waveform indicating left and right by a digital data string may be used. Needless to say.

  Similarly to the first embodiment described above, in the shutter glasses 420 according to the present embodiment, the offset setting unit 226 is controlled by the shutter control unit 222 in response to a user operation input through the operation unit 224. Set the offset.

(3D image display method)
Next, a stereoscopic video display method for displaying display data using the above-described stereoscopic video display device 410 will be described. FIG. 13 is a flowchart showing an overall flow of the stereoscopic image display method according to the second embodiment. Similar to the first embodiment, the process shown in FIG. 13A is repeatedly executed at a predetermined frame period while the stereoscopic image display apparatus 410 is instructed to display the display data, and the process shown in FIG. The process shown is repeatedly executed as an interrupt process, for example, in a cycle shorter than the frame period of the process of FIG. 13A as a parallel process of the process of FIG.

  Similar to the stereoscopic image display method in the first embodiment, in parallel with the image display processing shown in FIG. 13A, the light emission control unit 430 is positioned in the complete light shielding period Ps as shown in FIG. 13B. It is determined whether or not (S320). If it is not the complete light shielding period Ps (NO in S320), the process is terminated as it is.

  When it is the complete light shielding period Ps (YES in S320), the light emission control unit 430 determines whether or not it is included in a period during which the light emitting unit 162 emits light, for example, the above-described period x or period y (S620). When it is a light emission period (YES in S620), the light emission control unit 430 causes the light emitting unit 162 to emit light. If it is not the light emission period (NO in S620), the process is terminated as it is.

  This stereoscopic image display method can also easily suppress crosstalk while maintaining the amount of image light.

  In the first embodiment, the light emission control unit 160 causes the light emitting unit 162 to emit light during the complete light shielding period Ps. The user sets the shutter opening / closing timing offset when the reference light Lr is no longer visible through the operation unit 224, so that the shutter glasses 120 eliminate crosstalk without unnecessarily reducing the amount of video light. it can.

  In the stereoscopic image display system 400 according to the second embodiment, as in the stereoscopic image display system 100 according to the first embodiment, the user crosstalks by offsetting the opening / closing timing of the shutter so that the reference light Lr is not visually recognized. Can be eliminated. Furthermore, the stereoscopic video display device 410 of the stereoscopic video display system 400 indicates a control signal for controlling the opening / closing timing of the shutter glasses 420 by, for example, blinking of the light emitted from the light emitting unit 162. As described above, the stereoscopic image display device 410 also has a function of transmitting a control signal to the light emitting unit 162, so that it is not necessary to provide the control output unit 158 separately from the light emitting unit 162, and the number of components is reduced. Cost can be reduced.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the above-described embodiment, the light emission control units 160 and 430 derive the complete light shielding period Ps based on the control signal. However, the present invention is not limited to this, and the video display of the stereoscopic video display devices 110 and 410 is performed in advance. The video blanking period B may be derived from the characteristics, and the light emitting unit 162 may be caused to emit light by setting the video blanking period B as a complete light shielding period Ps.

  Note that each step of the stereoscopic image display method of the present specification does not necessarily have to be processed in time series in the order described in the flowchart, and may include processing in parallel or by a subroutine.

  The present invention can be used in a stereoscopic video display system, a stereoscopic video display device, and a stereoscopic video display method that allow a stereoscopic video to be perceived through shutter glasses.

100, 400 ... 3D image display system 110, 410 ... 3D image display device 120, 420 ... Shutter glasses 158 ... Control output unit 160, 430 ... Light emission control unit 162 ... Light emission unit 220 ... Control acquisition unit 222 ... Shutter control unit 226 ... Offset setting unit 228 ... right eye shutter 230 ... left eye shutter 450 ... light reception detection unit 452 ... control derivation unit

Claims (6)

A stereoscopic video display system comprising a stereoscopic video display device for perceiving a stereoscopic video and shutter glasses worn by a user when perceiving the stereoscopic video,
The stereoscopic image display device includes:
A video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax;
A control output unit that outputs a control signal for controlling the opening and closing timing of the left and right shutters of the shutter glasses;
Based on the control signal, a light emission control unit that causes the light emitting unit to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed;
With
The shutter glasses are
When the user wears the shutter glasses, a right-eye shutter that is positioned in front of the user's right eye and opens and closes an optical path;
When the user wears the shutter glasses, a left-eye shutter that is positioned in front of the user's left eye and opens and closes an optical path;
A control acquisition unit for acquiring the control signal;
A shutter control unit for controlling opening and closing timings of the right-eye shutter and the left-eye shutter according to the acquired control signal;
An offset setting unit that sets an offset of the opening and closing timing controlled by the shutter control unit in response to a user operation;
A stereoscopic video display system comprising: A stereoscopic video display system comprising a stereoscopic video display device for perceiving a stereoscopic video and shutter glasses worn by a user when perceiving the stereoscopic video,
The stereoscopic image display device includes:
A video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax;
Based on a control signal that controls the open / close timing of the left and right shutters of the shutter glasses, the light emitting unit emits light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed, and the emitted light A light emission control unit including the control signal in
With
The shutter glasses are
When the user wears the shutter glasses, a right-eye shutter that is positioned in front of the user's right eye and opens and closes an optical path;
When the user wears the shutter glasses, a left-eye shutter that is positioned in front of the user's left eye and opens and closes an optical path;
A light receiving detection unit that receives and detects light emitted by the light emitting unit;
A control deriving unit for deriving the control signal based on the detected light;
A shutter control unit that controls opening and closing timings of the right-eye shutter and the left-eye shutter according to the derived control signal;
An offset setting unit that sets an offset of the opening and closing timing controlled by the shutter control unit in response to a user operation;
A stereoscopic video display system comprising: A video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax;
A control output unit that outputs a control signal for controlling the open / close timing of the left and right shutters of the shutter glasses;
Based on the control signal, a light emission control unit that causes the light emitting unit to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed;
A stereoscopic video display device comprising: A video display unit that alternately displays a right-eye video and a left-eye video having horizontal parallax;
Based on a control signal that controls the opening and closing timing of the left and right shutters of the shutter glasses, the light emitting unit is caused to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed, and the emitted light is further A light emission control unit including a control signal;
A stereoscopic video display device comprising: Displaying right-eye video and left-eye video with horizontal parallax alternately,
Output control signals that control the opening and closing timing of the left and right shutters of the shutter glasses,
A stereoscopic image display method, comprising: causing a light emitting unit to emit light over a complete light-shielding period in which both the left and right shutters of the shutter glasses are closed based on the control signal. Displaying right-eye video and left-eye video with horizontal parallax alternately,
Based on a control signal that controls the opening and closing timing of the left and right shutters of the shutter glasses, the light emitting unit is caused to emit light over a complete light shielding period in which both the left and right shutters of the shutter glasses are closed, and the emitted light is further A stereoscopic image display method characterized by including a control signal.

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