JP2010268036A - 3D image device - Google Patents

Abstract

In a conventional 3D stereoscopic video device, the number of frames displayed per second (hereinafter referred to as the number of video frames) tends to increase in order to increase smoothness during viewing and responsiveness to moving images. Since the switching speed could not keep up, there was a problem that the left and right images entered the eyes unnaturally (hereinafter referred to as crosstalk), which was tired for the user's eyes.
By detecting the frame frequency of the input video signal and adjusting the phase of the synchronization signal in accordance with the frame frequency, a left / right video switching signal (to be transmitted to shutter-type liquid crystal glasses in accordance with the frame frequency) Hereinafter, the above-described crosstalk problem is solved by having a function of automatically adjusting the delay time of the LR signal.
[Selection] Figure 1

Description

  The present invention relates to a delay adjustment of a left-right image switching speed of a 3D stereoscopic image device using shutter-type glasses.

  Conventionally, 3D stereoscopic video is displayed by alternately displaying left and right video from a display device, and at the same time, a left and right video switching signal synchronized with the video (hereinafter referred to as LR signal) is sent to shutter-type liquid crystal glasses. To enable realistic viewing.

Japanese Patent No. 3066298 Japanese Patent No. 378967

However, the number of frames displayed per second (hereinafter referred to as the number of video frames) tends to increase in order to increase the smoothness during viewing and the responsiveness of moving images. The problem was that the video entered the eyes unnaturally (hereinafter referred to as crosstalk), which was tired for the eyes of the users.

  On the other hand, for example, in Japanese Patent Laid-Open No. 7-46631, a stereoscopic video signal composed of left and right video signals alternately changing for each field with a field frequency of 120 Hz is used as a relative position in the horizontal direction of the left and right eye videos. The above problem is solved by adjusting the horizontal output pulse for each of the left field and right field video signals so that the phase difference is optimal, but this is a measure for 3D stereoscopic video equipment at 120 Hz natural frequency. In addition, the problem of crosstalk occurs in video with a higher frequency.

  Furthermore, even if it is not a big problem in the situation where the frequency is low, in the situation where the frequency is high, the problem due to crosstalk becomes obvious not only due to the above-mentioned problem but also due to various other conditions. Will be.

  For example, the liquid crystal shutter has a problem that the problem of crosstalk becomes larger depending on the temperature because the reaction speed of the liquid crystal greatly varies depending on the temperature. In addition, since the liquid crystal shutter has a liquid crystal reaction speed that varies greatly depending on the type (for example, OCB liquid crystal, VA liquid crystal, etc.), there is a problem that the problem of crosstalk increases depending on the type of the liquid crystal shutter. In addition, since the liquid crystal shutter has a different liquid crystal reaction speed depending on the remaining battery level, there is a problem that the problem of crosstalk increases depending on the remaining battery level of the liquid crystal shutter.

In order to solve the above problems, the 3D stereoscopic video apparatus of the present invention detects the number of video frames and automatically adjusts the delay time of the LR signal transmitted to the shutter-type liquid crystal glasses according to the number of frames. Have

  In addition to the above, the present invention pays attention to the fact that the reaction speed of the liquid crystal changes depending on the outside air temperature, and solves the above-described crosstalk problem by using the temperature sensor for adjusting the delay time of the LR signal. Is.

  In addition to the above, the present invention receives the LR signal received by the shutter-type liquid crystal glasses and has a transmission function for sending useful information to the 3D stereoscopic image device, thereby performing bidirectional communication. By obtaining the latest information of the liquid crystal glasses on the receiving side and having a function of performing more detailed delay adjustment of the LR signal, the above-described crosstalk problem is solved.

  Specifically, by focusing on the fact that the response speed of the liquid crystal changes the remaining amount of the battery of the liquid crystal glasses and by changing the delay of the LR signal according to the remaining amount transmitted from the transmission function of the liquid crystal glasses side. This solves the above-mentioned problem of crosstalk. In addition, paying attention to the change of the user depending on the distance between the 3D stereoscopic image device and the liquid crystal glasses, the 3D stereoscopic image device and the liquid crystal glasses are interlocked to adjust the delay of the LR signal according to the mutual distance, This solves the above-described crosstalk problem.

According to the present invention, the number of video frames is detected before display on the panel, and even if the number of frames increases, depending on various conditions, for example, switching temperature characteristics of shutter-type liquid crystal glasses, between the 3D stereoscopic image device and the liquid crystal glasses Therefore, the user can easily obtain a comfortable 3D stereoscopic image display environment by adjusting the delay time in consideration of the distance and the visual variation of the user.

The block diagram which shows the structure of 3D stereoscopic image apparatus of this invention, and a liquid-crystal shutter megame Timing chart of 3D stereoscopic image device and liquid crystal shutter glasses Timing chart of video frequency detection method Correlation diagram of reaction speed and temperature of liquid crystal shutter Timing chart of two-way communication between 3D stereoscopic image device and LCD shutter glasses The figure which shows the transmission data from liquid crystal shutter glasses Correlation diagram between delay time and frequency Correlation diagram between temperature and response time in LCD shutter glasses

  (Embodiment 1) Embodiment 1 of the present invention will be described below with reference to the block diagram of the 3D stereoscopic image device and the liquid crystal shutter glasses 2 shown in FIG.

  The 3D stereoscopic video apparatus 1 includes a control unit 3, a video signal processing unit 4, a panel drive unit 5, a panel 6, a video signal detection unit 7, a delay calculation unit 8, a temperature sensor 9, and a temperature detection unit. 10 and a bidirectional transmission / reception unit 11.

  First, the 3D stereoscopic image device 1 will be described. First, a video signal (AA) input to the 3D stereoscopic video apparatus 1 will be described. In this video signal (AA), the left-eye image and the right-eye image are bundled, and each image has a parallax, which makes it possible to express a stereoscopic video. is there. Note that the left and right video signals have parallax information indicating the parallax amount and the like, but may not include parallax information.

  Next, the video signal processing unit 4 that performs video signal processing on the input video signal (AA) will be described. The video signal processing unit 4 divides the input video signal (AA) into video signals including a left-eye image and a right-eye image, and performs IP conversion, noise processing, image quality correction, and the like on each image. Are output as a video signal (AB). Further, the video signal processing unit 4 includes a horizontal pixel counter that counts the number of horizontal pixels, which will be described later, and a vertical line counter that counts the number of vertical lines, which are not shown.

  Next, the panel drive unit 5 performs signal processing for displaying the video signal (AB) output by the video signal processing unit 4 on the panel, and outputs the video signal (AC).

  Next, the panel 6 displays the video signal (AC) output from the panel drive unit 5. Here, the type of the panel 6 is not particularly limited, and any type such as a liquid crystal panel, a plasma panel, or an organic EL panel may be used.

  Normally, after the video signal (AA) is input to the video signal processing unit 4, the video signal (AB) is input to the panel driving unit 5 and the video signal (AC) is output to the panel 6. The horizontal synchronizing signal is required several times (hereinafter referred to as several H).

  Next, the video signal detection unit 7 detects the number of video frames of the video signal (AB) processed by the video signal processing unit 4 described above, and the information on the number of detected video frames, the synchronization signal, and the frame are stored in the left eye. The control unit 3 is notified of an LR signal (BA) indicating whether the image is a work image or a right eye image.

  Next, the delay calculation unit 8 receives the video frame number information (BA) detected by the video signal detection unit 7 input to the control unit 3 as delay information (BB), and calculates an appropriate delay time. , LR signal delay time (BC).

  Next, the bidirectional transmission / reception unit 11 receives the synchronization signal, the LR signal (BD) from the control unit 3, and the delay information (BC) from the delay calculation unit 8, and synchronizes based on the delay time (BC). The delay adjustment of the signal and the LR signal (BD) is performed, and the LR signal (BE) is transmitted to the liquid crystal shutter glasses 2.

  Next, the temperature sensor 9 and the temperature detection unit 10 measure the temperature in the viewing environment of the 3D stereoscopic image apparatus 1 and input the temperature information (CB) to the control unit 3.

  Next, the liquid crystal shutter glasses 2 will be described. The liquid crystal shutter glasses 2 include a control unit 12, a bidirectional transmission / reception unit 13, and a liquid crystal glasses unit 14. Each configuration will be described in detail below.

  First, the bidirectional transmission / reception unit 13 receives the LR signal (BE) output from the bidirectional transmission / reception unit 11 of the 3D stereoscopic video apparatus 1 described above, and outputs the LR signal (BF). Next, the control unit 12 receives the LR signal (BF) output from the bidirectional transmission / reception unit 13 and controls the liquid crystal shutter glasses 2.

  Next, the liquid crystal glasses section 14 receives information (BG) in consideration of the delay time of the liquid crystal left / right video switching speed (hereinafter referred to as the left / right switching speed) to the LR signal (BF) received by the control section 12. This is a liquid crystal glasses section that originally switches the liquid crystal shutter.

  Next, based on the above-described configuration, the processing flow of the 3D stereoscopic image device 1 and the liquid crystal shutter glasses 2 according to the first embodiment will be described with reference to FIGS. 2 and 3.

  FIG. 2 shows the timing of LR signal processing of the 3D stereoscopic image device 1 and the liquid crystal shutter glasses 2, and FIG. 3 shows a frequency detection method in the 3D stereoscopic image device.

  In FIG. 2, the first line from the top shows a vertical synchronization signal in the video signal (AA) input to the video signal processing unit 4 in the 3D stereoscopic video apparatus 1, and the second line from the top shows A vertical synchronization signal in the video signal (AA) input to the video signal processing unit 4 is shown.

  The third line from the top indicates the horizontal pixel count value counted by a counter (not shown) included in the video signal processing unit 4 in the 3D stereoscopic image device 1, and the fourth line from the top indicates the fourth line. The vertical line count value counted by a counter (not shown) included in the video signal processing unit 4 in the 3D stereoscopic video device 1 is shown, and the fifth line indicates the video signal detection unit in the 3D stereoscopic video device 1 7 shows a frequency count value counted by a counter (not shown) included in 7.

  Also, the sixth line from the top shows the LR signal (BA) output from the video signal detector 7. Further, the seventh line from the top shows a vertical synchronization signal that has been subjected to delay processing in the bidirectional transmission / reception unit 11 based on delay information (BC) output from the delay calculation unit 8 in the 3D stereoscopic image apparatus 1. The eighth line from the top shows an LR signal (BE) for switching the liquid crystal shutter based on the vertical synchronization signal of the seventh line.

  In the ninth line from the top, a liquid crystal shutter that takes into account the delay corresponding to the distance transferred from the 3D stereoscopic image device 1 described later to the liquid crystal shutter glasses 2 in the LR signal (BE) of the eighth line described above. The tenth line from the top shows the liquid crystal shutter switching signal in consideration of the delay corresponding to the characteristics of the liquid crystal shutter to be described later. .

Here, T3 indicates the interval of horizontal synchronization signals (hereinafter referred to as H pulses), T2 indicates the interval of vertical synchronization signals (hereinafter referred to as V pulses), and T1 indicates a video frame number display period of 1 second. Show. (T4 means V pulse interval including left and right images)
L represents the number of horizontal pixels, M represents the number of vertical lines, and N represents the number of video frames on the left and right. (If the left and right images are included, the number of video frames is doubled.)
Α (hereinafter referred to as delay time α) indicates a time in which the delay calculation unit 8 considers the delay time with respect to the number of video frames, and α2 (hereinafter referred to as delay time α2) is transferred to the liquid crystal shutter glasses 2. The time taking into account the delay for the distance is shown, and α3 (hereinafter referred to as the delay time α3) shows the delay time until the liquid crystal shutter switches the left and right images by the LR signal reaching the liquid crystal shutter glasses. .

  Next, referring to FIG. 2, a method for generating the LR signal and transmitting / receiving the LR signal to the liquid crystal shutter glasses 2 will be described.

  First, when the video signal detector 7 counts the horizontal pixels (L) for one line and counts the number of horizontal pixels for one line as shown in the third line from the top in FIG. 2 (period T3). And H pulses are output, and then the horizontal lines (M) for the screen are counted as shown in the fourth line from the top in FIG. 2, and the number of horizontal lines for one screen is counted (period T2). And V pulses are generated.

  Next, a left / right identification signal (referred to as an LR signal) is generated by using the generated V pulse to indicate the left screen and the right screen with signal levels ("H" and "L"). In addition, the delay time α is automatically determined by the number of V pulses processed in one second (T1 period), and the LR signal is similarly delayed by adding α.

  Here, the delay time α will be described in detail with reference to FIGS. 2 and 7. In FIG. 7, the horizontal axis indicates the drive frequency (number of V pulses) displayed on the panel 6 of the 3D stereoscopic video apparatus 1, and the vertical axis indicates the α value that is the delay time. Note that the normal video signal is displayed at 60 Hz as the drive frequency. However, in the 3D stereoscopic image device, the drive frequency is 120 Hz, 180 Hz, 240 Hz, etc. by driving at double speed for high image quality. It has been changed to. In FIG. 7, although up to 240 Hz is described, the present invention is not limited to this, and can be applied even with a drive frequency higher than that.

  As shown in FIG. 7, the α value increases as the drive frequency increases. However, the setting of the α value is not limited to the value shown in FIG. 7, and other α values can be set. For example, it is possible to set the α value in a linear function according to the drive frequency, and it is also possible to fix the α value when a predetermined drive frequency is exceeded.

  Next, delay processing in the bidirectional transmission / reception unit 11 in the 3D stereoscopic image device 1 will be described based on the α value set in this way. In FIG. 2, the driving frequency is changed from 60 Hz to 120 Hz when the first T1 period is followed by the second T1 period.

  As shown in the seventh line of FIG. 2, in the first T1 period, the vertical synchronization signal after the delay calculation is output after the time T3. This is because, as shown in FIG. 7, the α value is 0 when the driving frequency is 60 Hz, and the vertical synchronization signal is output after T3 time even when delay processing is performed. .

  On the other hand, as shown in the seventh line of FIG. 2, in the second T1 period, the vertical synchronization signal is output after the time T3-α for the vertical concentric signal after the delay calculation. Thereby, when the drive frequency is changed from 60 Hz to 120 Hz, the vertical synchronization signal after delay calculation output from the bidirectional transmission / reception unit 11 is output earlier by the time of the α value than in the case of 60 Hz. Will be. As a result, the liquid crystal glasses part 14 of the liquid crystal shutter glasses 2 can be opened and closed quickly by the time of the α value. As a result, the switching speed of the liquid crystal shutter can be improved, and the drive frequency is increased. It is possible to suppress the occurrence of crosstalk caused by the increase.

  Similarly, although not shown in FIG. 2, as shown in FIG. 7, the α value increases as the driving frequency increases (for example, 180 Hz, 240 Hz, etc.). The vertical synchronization signal after delay calculation output from 11 can be output at an earlier time. Along with this, it becomes possible to set the switching speed of the liquid crystal shutter in accordance with the driving frequency, and it is possible to suppress the occurrence of crosstalk.

  Note that the delay time α can be adjusted by fine adjustment from the user viewing the 3D stereoscopic video.

  2, the LR signal to which the delay information is transmitted from the 3D stereoscopic image device 1 described above is proportional to the distance between the 3D stereoscopic image device 1 and the liquid crystal shutter glasses 2. Then, the delay time α2 is taken into account (BF). As for the delay time α2 described above, as shown in FIG. 2, a process for performing a fixed time delay on the LR signal transmitted from the 3D stereoscopic video apparatus 1 side is described. However, depending on the distance between the 3D stereoscopic image device 1 and the liquid crystal shutter glasses 2, it is possible to perform a process of advancing the synchronization signal by the time α2.

  Further, as described in the 10th line from the upper part of FIG. 2, the control unit 12 of the liquid crystal shutter glasses 2 takes into account the switching speed of the liquid crystal glasses and inputs the LR signal (BG), so that the actual liquid crystal shutter glasses The left and right screens are switched and 3D stereoscopic video is provided to the viewer user.

  Next, a method for detecting the number of video frames in the video signal detector 7 will be described with reference to FIG. The description of T1, T2, and T3 is omitted because it has been described above with reference to FIG. In FIG. 3, O is a numerical value representing an actual video frequency, and P is a delay time automatically calculated for the number of video frames (O). Specifically, values such as 60 Hz, 120 Hz, 180 Hz, and 240 Hz described above are conceivable for O.

  Next, when the T1 period is completed (corresponding to the first T1 period in FIG. 2), the actual number of video frames (O) is calculated, and the delay time ( P) is determined.

  Note that the number of video frames (O) is always sampled at intervals of 1 second, and even if the number of video frames (O) changes in a transitional manner, the actual number of video frames (O ), The delay time (P) is adjusted.

  As described above, using the present invention, the LR signal taking into account the delay time (P) corresponding to the number of video frames (O) is transmitted from the 3D stereoscopic video device (1) to the liquid crystal shutter glasses (2), The received liquid crystal shutter glasses optimally switch the LR signal according to the number of video frames (O), so that a 3D stereoscopic video environment that is comfortable for the user can be provided no matter how many video frames (O).

(Example 2)
With respect to the configuration of the first embodiment described above, provision of a highly accurate 3D stereoscopic image environment will be described with reference to FIGS. 1, 4, and 8. FIG. The second embodiment is different from the first embodiment in that the temperature sensor 9 and the temperature detection unit 10 are provided in the 3D stereoscopic image device 1 to perform a synchronization process corresponding to the temperature. Details will be described below.

  In FIG. 1, reference numeral 9 denotes a temperature sensor added to the 3D stereoscopic image device, which investigates the outside air temperature (CA) of the device, and 10 detects the input outside air temperature (CA) and controls the control unit (3 (CB) is a temperature detector.

  Next, FIG. 4 shows the distribution of the outside air temperature and the switching speed, with the horizontal axis representing the left / right switching speed of the liquid crystal and the vertical axis representing the outside air temperature. Usually, the recommended temperature for using the liquid crystal shutter glasses is around 0 ° C to 40 ° C. In the present invention, the delay time (BD and P) of the LR signal is determined by the distribution of temperature / left / right switching speed such as P0, P1, P2, P3, P4, and P5.

  Next, a method for setting the delay time of the LR signal will be described in more detail with reference to FIG. As shown in FIG. 8, the response speed changes according to the temperature characteristics. Specifically, when the temperature is low, the response speed of the liquid crystal increases because the year increases, so a response time of about 900 ms is required in an environment of −30 degrees, whereas an environment of 20 degrees. In, a response is possible with a response time of about 100 ms.

  Therefore, in the present invention, as in the case of the drive frequency described above, the vertical synchronization signal of the vertical synchronization signal after the delay calculation of the seventh line from the upper stage in FIG. By changing the rise time, the synchronization signal can be output at an appropriate timing even when the response speed changes due to the temperature characteristics.

  In the above-described configuration, the configuration in which the temperature sensor 9 and the temperature detection unit 10 are provided on the 3D stereoscopic image device 1 side has been described. However, the present invention is not limited to this, and the temperature sensor 9 and the temperature detection unit are provided. 10 may be provided on the liquid crystal shutter glasses 2, and the detected temperature information may be provided on the 3D stereoscopic image apparatus 1 side via the bidirectional transmission / reception units 12 and 13. With this configuration, the temperature environment of the liquid crystal shutter glasses can be detected more appropriately.

(Example 3)
With respect to the first and second embodiments described above, provision of a more accurate 3D stereoscopic image environment will be described with reference to FIGS. 1, 5, and 6. The third embodiment is different from the first and second embodiments in that the 3D stereoscopic image device 1 can receive the signal from the three-dimensional shutter glasses 2 to make the characteristics of the three-dimensional shutter glasses 2 different. This makes it possible to perform the processing of the synchronization signal. Details will be described below.

  In FIG. 1, reference numeral 11 denotes a bidirectional receiving unit of the 3D stereoscopic image apparatus 1, which is used only as a unidirectional transmission side in the first embodiment. Reference numeral 13 denotes a bidirectional receiving unit of the liquid crystal shutter glasses 2, which is used only as a unidirectional receiving side in the first embodiment.

  However, when the bidirectional receiving unit 11 of the 3D stereoscopic video apparatus 1 and the bidirectional receiving unit 13 of the liquid crystal shutter glasses 2 transmit and receive bidirectionally, a further highly accurate 3D stereoscopic video environment can be provided.

Information that the control unit 12 of the liquid crystal shutter glasses 2 has correctly received the LR signal (BF) including the delay time (P) added in the first and second embodiments described above to the bidirectional transmission / reception unit 12. Enter (DA). (It will be described later with reference to FIGS. 5 and 6)
Next, the information (DB) transmitted from the bidirectional transmission / reception unit 12 is received by the bidirectional transmission / reception unit 11 of the 3D stereoscopic image apparatus 1, and information (DC) indicating that the liquid crystal shutter glasses are correctly received (hereinafter, reception). (Referred to as information).

  Next, the control unit 3 uses the delay time from the transmission of the LR signal (BD) taking the delay time (P) to the reception of the reception information (DC), the 3D stereoscopic image device 1 and the liquid crystal shutter glasses ( 2) is calculated, and the delay information (delay information (8)) is added to the delay calculation unit 8 by adding the information on the number of video frames (BA), the information on the temperature sensor (CB), and the information on the distance interval based on the reception information (DC). BB) is sent.

  Next, a case where two liquid crystal shutter glasses are present will be described with reference to FIG. α4 (hereinafter referred to as delay information α4) is a delay time until the liquid crystal shutter glasses 1 are reached, and α5 (hereinafter referred to as delay information α5) is a delay time until the liquid crystal shutter glasses 2 are reached. .

  Α6 (hereinafter referred to as delay information α6) is a delay time from when the liquid crystal shutter glasses 1 receive the LR signal until it is received by the 3D stereoscopic image device, and α7 (hereinafter referred to as delay information α7). Is a delay time from when the liquid crystal shutter glasses 2 receive the LR signal until they are received by the 3D stereoscopic image device.

  Note that “aa” and “bb” are solid identification signal data inherent to each liquid crystal shutter glasses and can be freely changed on the liquid crystal shutter glasses side.

  The present invention provides liquid crystal shutter glasses that receive 3D stereoscopic video using 3D stereoscopic video on the receiving side and delay information α4, α5, α6, α7 and solid identification signals “aa” and “bb” on the inside. By detecting the number and distance interval, it is possible to provide a more accurate 3D stereoscopic image environment.

  Further, in the table of FIG. 6, the user's viewing environment is changed to 3D stereoscopic video by exchanging useful information regarding the bidirectional transmission / reception information (DB) between the 3D stereoscopic video device (1) and the liquid crystal shutter glasses (2). It can be determined on the device side, and the viewing environment can be tracked according to the situation. Specifically, information indicating the delay amount of the glasses, information indicating the number of viewers, information indicating the remaining battery level of the liquid crystal shutter and the position of the glasses, information indicating the type of glasses, and the like are included. Note that these are examples of information that the liquid crystal shutter glasses 2 transmit to the 3D stereoscopic image device 1, and the present invention is not limited to these contents.

  As described above, according to the present invention, in the transmission ID and the ID transmission of the liquid crystal shutter glasses, the distance interval and the number of viewers can be determined, the delay information of the LR signal is adjusted, and the optimum 3D stereoscopic video for a plurality of viewers is obtained. The environment can be provided.

  Furthermore, by transmitting the LR signal as it is to the 3D stereoscopic video apparatus, it is possible to determine whether the LR signal is correctly switched or whether the battery on the liquid crystal shutter glasses side is low.

  The present invention relates to a delay adjustment of a switching speed of left and right images of a 3D stereoscopic image device using shutter-type glasses, and detects a frame frequency of an input video signal and adjusts a phase of a synchronization signal according to the frame frequency. By having the function of automatically adjusting the delay time of the left / right video switching signal (hereinafter referred to as LR signal) to be transmitted to the shutter-type liquid crystal glasses according to the frame frequency, the above-mentioned problem of crosstalk It is a stereoscopic video device that solves the above.

DESCRIPTION OF SYMBOLS 1 3D stereoscopic video apparatus 2 Liquid crystal shutter glasses 3 Control part of 3D stereoscopic apparatus 4 Video signal processing part of 3D stereoscopic video apparatus 5 Video signal detection part of 3D stereoscopic video apparatus 6 Panel drive part of 3D stereoscopic video apparatus 7 3D stereoscopic video apparatus Panel unit 8 delay calculation unit of 3D stereoscopic video device 9 temperature sensor of 3D stereoscopic video device 10 temperature detection unit of 3D stereoscopic video device 11 bidirectional transmission / reception unit of 3D stereoscopic video device 12 control unit of liquid crystal shutter glasses 13 liquid crystal shutter glasses Bidirectional transmitter / receiver 14 Liquid crystal glasses part of LCD shutter glasses

Claims (6)

A video signal processing unit for detecting a synchronization signal of the input video signal;
A video signal detection unit that detects a frame frequency of the input video signal based on the synchronization signal detected by the video signal processing unit;
A calculation unit for calculating an output timing of the synchronization signal based on a frame frequency of the input video signal;
A transmission unit that outputs the synchronization signal at the output timing calculated by the calculation unit with respect to the input synchronization signal;
A stereoscopic video apparatus, wherein the opening / closing timing of the glasses is controlled based on the synchronization signal transmitted from the transmission unit. When the video signal detection unit detects that the frame frequency is a value greater than or equal to a predetermined value, the input synchronization signal is compared with the case where the frame frequency is a value less than or equal to the predetermined value in the transmission unit. 2. The stereoscopic video apparatus according to claim 1, wherein the signal is output at a faster timing. A video signal processing unit for detecting a synchronization signal of the input video signal;
A temperature sensor that detects the ambient temperature;
Based on the temperature detected by the temperature sensor, a calculation unit that calculates the output timing of the synchronization signal;
A transmission unit that outputs the synchronization signal at the output timing calculated by the calculation unit with respect to the input synchronization signal;
A stereoscopic video apparatus, wherein the opening / closing timing of the glasses is controlled based on the synchronization signal transmitted from the transmission unit. In the temperature sensor, when it is detected that the ambient temperature is equal to or less than a predetermined value, the transmission unit receives the input synchronization signal more than the case where the ambient temperature is equal to or greater than the predetermined value. 4. The stereoscopic video apparatus according to claim 3, wherein the stereoscopic video apparatus outputs the video data at a fast timing. The stereoscopic video apparatus further includes a receiving unit that receives information from the glasses,
The calculation unit calculates the output timing of the synchronization signal based on the information received by the reception unit,
5. The stereoscopic video apparatus according to claim 1, wherein the transmission unit outputs a synchronization signal with respect to the input synchronization signal at an output timing calculated by the calculation unit. 6. . 6. The stereoscopic image apparatus according to claim 5, wherein the information from the glasses includes at least one of position information of glasses, battery information of glasses, and information on types of glasses.

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