JP2013168693A - Driving device for liquid crystal shutter eyeglasses - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a receiving performance of a signal for driving a liquid crystal shutter in a three-dimensional video display system in which a viewer is enabled to perform three-dimensional viewing by alternately displaying a right-eye video image and a left-eye video image on a screen in a fixed term and using eyeglasses with liquid crystal shutters which the viewer wears to perform transmission and no transmission in a right-eye liquid crystal and a left-eye liquid crystal synchronously to the fixed term.SOLUTION: Liquid crystal shutter eyeglasses 100 comprise a transmission signal control section 103 and a signal transmitter 104, and a synchronizing signal of liquid crystal shutter drive equal to other liquid crystal shutter eyeglasses 110 is transmitted from first liquid crystal shutter eyeglasses to second and third liquid crystal shutter eyeglasses. Therefore, eyeglasses which are unlikely to receive a signal of liquid crystal shutter drive because of an obstacle or an angle is enabled to perform liquid crystal shutter drive, thereby enlarging a reception range of liquid crystal shutter eyeglasses as a whole.

Description

  The present invention relates to liquid crystal shutter glasses for a stereoscopic video playback system in which a playback video by a stereoscopic video playback device is viewed as a stereoscopic video, and more particularly to a synchronization signal for opening and closing the liquid crystal shutter.

  As a conventional method for viewing stereoscopic video, there is a method in which a viewer wears special glasses and views stereoscopic video projected by a stereoscopic video display device such as a television. In such a glasses-type viewing method, an image with parallax, for example, a right-eye image (R) and a left-eye image (L) are alternately displayed on a video display device such as a television for each field (or frame). Is output. Since the viewer wears special glasses, the right eye image (R) enters the right eye and the left eye image (L) enters the left eye, so that the viewer can view the image three-dimensionally due to the parallax. It is structured.

  As an example of special glasses, a liquid crystal shutter and a polarizing plate are provided on the left and right eye lenses, and the right and left eye liquid crystal shutters are alternately transmitted and untransmitted alternately to display the right eye image (R) and the left eye image (L). There are technologies that make it visible to each eye.

  Further, as disclosed in Patent Document 1, there is a technique for causing the liquid crystal shutter glasses to detect the switching of the left and right images using a spatial transmission signal transmitter such as infrared rays from the side of a stereoscopic image display device such as a television.

JP-A 64-67095

  However, in the conventional configuration, the liquid crystal shutter glasses need to be able to receive a liquid crystal shutter switching signal from one signal source (for example, a transmission device attached to the video display device) in order to achieve synchronization. However, when viewing with multiple people, depending on the viewing location, there are places where it is difficult to receive signals from the signal source. In this case, a signal for controlling the driving of the liquid crystal shutter can be received. Therefore, a specific viewer who cannot receive the synchronization signal sees the right-eye video (R) and the left-eye video (L) with parallax at the same time because the liquid crystal shutter is not driven, and cannot view the stereoscopic video.

  SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and an object of the present invention is to provide a transmission device that synchronizes the liquid crystal shutter driving operation between the liquid crystal shutter glasses in order to widen the transmission range of the synchronization signal for driving the liquid crystal shutter. To do.

  In order to solve the above-described conventional problems, the liquid crystal shutter glasses for a stereoscopic video reproduction system according to the present invention include a spatial transmission signal transmitter that can drive the liquid crystal shutters with respect to other liquid crystal shutter glasses. An apparatus is provided that transmits a synchronization signal for driving the left and right liquid crystal shutters from one liquid crystal shutter glasses to the second and third liquid crystal shutter glasses.

  According to this configuration, when a plurality of people are watching a stereoscopic video, a synchronization signal for driving the left and right eye liquid crystal shutters transmitted from a specific spatial transmission signal transmitter, such as a video display device, due to an obstacle or the like is received. Even if this is not possible, it becomes possible to receive a synchronization signal from other liquid crystal shutter glasses watching a similar image, and to expand the receivable range of the liquid crystal shutter switching signal.

  In addition, the spatial transmission signal transmitter of the present invention transmits a signal different from the signal from the signal source, for example, a signal for adding a code for identifying the transmitter device or changing a transmission cycle at the same time, thereby It is possible to distinguish it from the source.

  When receiving the two or more types of signals, a circuit for distinguishing a signal from the base signal source and a signal from another pair of glasses is provided.

  According to this configuration, the base signal source can be identified, the liquid crystal shutter is driven with priority on the base signal source, and the liquid crystal shutter is driven by a signal from other liquid crystal shutter glasses such as the first glasses. If this is the case, power consumption can be reduced by stopping the transmission of the synchronization signal.

According to the liquid crystal shutter glasses for the stereoscopic video reproduction system of the present invention, even if the second and third liquid crystal shutter glasses cannot receive a liquid crystal shutter switching signal from a specific spatial signal transmission device (for example, a video display device), Since the same liquid crystal shutter switching signal can be received from the first liquid crystal shutter glasses, it is possible to reduce reception problems depending on the viewing location.
Outline range

1 is a block diagram of the main configuration of liquid crystal shutter glasses in Embodiment 1 of the present invention. The block diagram of the main structures of the liquid-crystal shutter spectacles in Example 2 of this invention. The block diagram of the main structures of the liquid-crystal shutter spectacles in Example 3 of this invention. Block diagram of main components when a free-running circuit is added to the liquid crystal shutter glasses in Embodiment 3 of the present invention Illustration of an embodiment of a remote control system

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a block diagram of main components of liquid crystal shutter glasses in the stereoscopic video reproduction system of the present invention. The stereoscopic video reproduction system includes a transmission device 110 provided in a video display device, and liquid crystal shutter glasses 100 that control synchronization processing based on a signal output from the transmission device.

  A liquid crystal shutter glasses in a conventional stereoscopic video reproduction system includes a receiving unit 101 that receives a wireless transmission signal, a decoder unit 102 that decodes the received signal, a liquid crystal shutter control unit 105 that controls the liquid crystal shutter from the decoded signal, and a liquid crystal shutter. 106 is provided.

  In the present invention, in order to transfer a wireless transmission signal newly received by the receiving unit 101 to the above conventional liquid crystal shutter glasses to another liquid crystal shutter glasses, a transmission signal generating unit 103 that generates a transmission signal for switching liquid crystal shutters and a wireless signal A transmission unit 104 is provided.

  The operation of the liquid crystal shutter glasses of the present invention configured as described above will be described. FIG. 5 shows an embodiment of a remote control system for driving a liquid crystal shutter in the stereoscopic video display system shown in FIG.

5 includes a liquid crystal shutter glasses 500 (corresponding to the liquid crystal shutter glasses 100) and a video display device 505 (corresponding to the video display device). The video display device 505 alternately displays the right-eye video (R) and the left-eye video (L) for each field (or frame), and the right and left shutter switching timing of the liquid crystal shutter glasses 500. A timing signal for switching a field (or frame) to be controlled is transmitted from a signal transmission unit 507 of a transmission device 506 (corresponding to the transmission device 110 described above) by a wireless transmission signal such as infrared rays. The signal sent here is a code signal composed of a code for identifying shutter switching and a code for distinguishing between the right eye and the left eye, and the carrier wave is modulated by this code signal.
The signal transmitted by the transmission device 506 is received by the reception unit 501 (corresponding to the reception unit 101 described above) of the liquid crystal shutter glasses 500. Based on the received signal, the right-eye liquid crystal shutter 502 and the left-eye liquid crystal shutter 503 (corresponding to the liquid crystal shutter portion described above) are driven.

  Referring to FIG. 5, the liquid crystal shutter glasses 500 must be able to directly receive a signal from a specific transmission device 506. However, when viewing a 3D television with a plurality of people, other people may become an obstacle, and the signal from the transmission device 506 is not always received. Therefore, in order to widen the signal reception range, it is necessary to install a transmission signal device.

  Here, a control system of the liquid crystal shutter glasses 500 of the stereoscopic video apparatus will be described with reference to FIG. The transmission device 110 is a transmission device that transmits a code signal corresponding to an item to be controlled. For example, the transmission device 110 transmits a signal that drives the operation of the left and right liquid crystal shutters. The transmission device 110 in FIG. 1 is equivalent to the transmission device 506 in FIG.

  A signal sent from the transmission device 110 is received by the receiving unit 101 of the liquid crystal shutter glasses 100, the received signal is decoded by the decoder unit 102, and a control signal for switching the shutter operation between the right eye and the left eye is sent to the liquid crystal shutter control unit. Sent to 105. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right eye liquid crystal shutter units 106 alternately.

  At the same time, a signal for switching between the liquid crystal shutter operations of the right eye and the left eye received by the receiving unit 101 is sent to the transmission signal control unit 103, so that an equivalent signal is transmitted again by the transmission device 104. The signal transmission unit 104 transmits a signal encoded by infrared rays or the like, similar to the transmission device 110. The transmission unit 104 can transmit a liquid crystal shutter driving signal to the left and right liquid crystal shutter glasses by being provided, for example, in a temple unit of the liquid crystal shutter glasses, 504 in FIG.

  Note that the switching signal output from the transmission signal control unit 103 and the transmission device 104 is not limited to the case where the signal received by the reception unit 101 is output as it is, and for example, the switching signal timing can be changed and output. It is.

  Specifically, the first liquid crystal shutter glasses receive the switching signal at time t1, and after receiving the first liquid crystal shutter glasses, a predetermined time t2 is required between outputting the second and third liquid crystal shutters. It becomes. In this case, if processing is performed in the second and third liquid crystal shutter glasses as they are, the second and third liquid crystal shutter glasses are opened and closed at the timing of time t1 + t2, and the timing of synchronization with the video display device is synchronized. It will shift.

  Therefore, for the switching signal output from the first liquid crystal shutter glasses to the second and third liquid crystal shutter glasses, it is necessary to convert the timing of the switching signal in consideration of this time t2. Specifically, in the second and third liquid crystal shutter glasses, it is necessary to open and close the shutter glasses at the timing of t1-t2.

  As another solution, the timing of the switching signal output from the transmission device 110 to the first liquid crystal shutter glasses is set to a time interval of t1 + t2, and the image display device also has a left eye image at the timing of t1 + t2. By switching the right-eye image, any of the first to third liquid crystal shutter glasses can be opened / closed at the same timing, and this synchronization problem can be solved.

  According to such a configuration, by providing the liquid crystal shutter glasses 100 with the transmission unit 104 equivalent to the transmission device 110, it is possible to transmit a liquid crystal shutter operation switching signal to the second and third liquid crystal shutter glasses. The receiving range of the liquid crystal shutter switching signal can be expanded.

  In the present embodiment, the signal transmission unit 104 is provided in the temple portion of the liquid crystal shutter glasses 100, but may be provided in other places such as a spectacle frame.

  With the above configuration, according to the liquid crystal shutter glasses for the stereoscopic video reproduction system of the present invention, the second and third liquid crystal shutter glasses receive a liquid crystal shutter switching signal from a specific spatial signal transmission device (for example, a video display device). Even if it is not possible, since the same liquid crystal shutter switching signal can be received from the first liquid crystal shutter glasses, it is possible to reduce reception problems due to viewing locations.

  FIG. 2 is a main configuration block diagram of the liquid crystal shutter glasses according to the second embodiment of the present invention. 2, the same reference numerals are used for the components in FIGS. 1 and 5, and descriptions thereof are omitted.

  In FIG. 2, the present invention includes a device 207 for storing the timing for switching the liquid crystal shutter in the liquid crystal shutter glasses and a free-running circuit 208 for generating a signal for driving the switching of the liquid crystal shutter at the stored timing.

  A signal sent from the transmission device 110 is received by the receiving unit 101 of the liquid crystal shutter glasses 100, the received signal is decoded by the decoder unit 102, and a control signal for switching the shutter operation between the right eye and the left eye is sent to the liquid crystal shutter control unit. Sent to 105. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right eye liquid crystal shutter units 106 alternately.

  At the same time, a signal for switching the liquid crystal shutter operation between the right eye and the left eye received by the receiving unit 101 is stored in the liquid crystal shutter switching timing storage device 207 as a signal cycle for switching the liquid crystal shutter operation between the right eye and the left eye.

  If the receiving unit 101 detects that the receiving unit 101 has not received a signal for switching the liquid crystal shutter operation, the self-running circuit 208 uses the liquid crystal shutter switching timing stored in the liquid crystal shutter operation switching timing storage device 207 to Then, a control signal for switching the shutter operation between the right eye and the left eye is sent to the liquid crystal shutter control unit 105. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right liquid crystal shutter units 106 alternately.

  When the receiving unit 101 detects that the liquid crystal shutter operation switching signal has not been received, a signal indicating that the receiving unit 101 has not detected the signal is sent to the transmission signal control unit 103, whereby the transmission signal control unit 103 and the transmission device 104 By stopping the operation, energy consumption can be suppressed.

According to such a configuration, the liquid crystal shutter glasses 100 are provided with the liquid crystal shutter switching timing storage device 207 and the self-propelled device 208 in the transmission device 110, so that even if the liquid crystal shutter glasses 100 cannot receive the liquid crystal shutter switching timing signal, A shutter switching operation can be performed.
Further, when the liquid crystal shutter switching signal is not received, the power consumption can be suppressed by pausing the liquid crystal shutter switching signal transmission device.

  FIG. 3 is a block diagram of main components of the liquid crystal shutter glasses according to the third embodiment of the present invention. 3, the same reference numerals are used for the components in FIGS. 1 and 5, and descriptions thereof are omitted.

  In FIG. 3, the present invention includes a signal source discriminating device 309 that identifies the source of the liquid crystal shutter switching signal.

  A signal transmitted from a transmission device B 321 different from the transmission device A 320 and the transmission device A 320 is received by the reception unit 101 of the liquid crystal shutter glasses 100, the received signal is decoded by the decoder unit 102, and the decoded signal is determined as a signal source. The transmission source of the signal received by the device 309 is determined. At that time, in order to determine the transmission source of the signal, the transmission device A 320 and the transmission device B 321 need to transmit with different signals and timing. For example, a signal “A” is attached to a signal sent from the transmitting device A 320, and a code “B” is inserted into a signal sent from the transmitting device B 321. The A signal transmission time is suppressed to less than half of the eyeglass shutter switching timing, for example, Ts, and the A signal is transmitted in accordance with the shutter switching timing. Thereafter, when the switching timing Ts is half, and when Ts / 2, the signal transmission of the transmission apparatus B 321 is performed, so that A and B can be prevented from being sent to the reception unit 101 at the same time. The decoder unit 102 decodes the signal source information and shutter switching timing information of the transmitted signal, and sends a switching control signal for the shutter operation of the right eye and the left eye to the liquid crystal shutter control unit 105 based on the information. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right eye liquid crystal shutter units 106 alternately.

  At the same time, a signal for switching between the liquid crystal shutter operations of the right eye and the left eye received by the receiving unit 101 is sent to the transmission signal control unit 103, so that an equivalent signal is transmitted again by the transmission device 104. The signal transmission unit 104 transmits a signal encoded by infrared rays or the like, similar to the transmission device 110. The transmission unit 104 can transmit a liquid crystal shutter driving signal to the left and right liquid crystal shutter glasses by being provided, for example, in a temple unit of the liquid crystal shutter glasses, 504 in FIG.

According to such a configuration, the liquid crystal shutter glasses 100 are provided with the liquid crystal shutter switching timing storage device 207 and the self-propelled device 208 in the transmission device 110, so that even if the liquid crystal shutter glasses 100 cannot receive the liquid crystal shutter switching timing signal, A shutter switching operation can be performed.
Further, when the liquid crystal shutter switching signal is not received, the power consumption can be suppressed by pausing the liquid crystal shutter switching signal transmission device.

  FIG. 4 is a main configuration block diagram of the liquid crystal shutter glasses according to the fourth embodiment of the present invention. 4, the same reference numerals are used for the components in FIGS. 1, 2, 3, and 5, and descriptions thereof are omitted.

  In FIG. 4, the present invention includes a signal source discriminating device 309 for identifying a source for generating a liquid crystal shutter switching signal. The liquid crystal shutter glasses store a device 207 for storing the liquid crystal shutter switching timing and switch the liquid crystal shutter at the stored timing. Is provided with a free-running circuit 208 that generates a signal for driving the.

  Similarly to the third embodiment, the transmission device A320 and a signal transmitted from a transmission device B321 different from the transmission device A320 are received by the reception unit 101 of the liquid crystal shutter glasses 100, and the received signal is decoded by the decoder unit 102. The source discriminator 309 discriminates the transmission source of the received signal. The decoder unit 102 decodes the signal source information and shutter switching timing information of the transmitted signal, and sends a switching control signal for the shutter operation of the right eye and the left eye to the liquid crystal shutter control unit 105 based on the information. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right eye liquid crystal shutter units 106 alternately.

  At the same time, a signal for switching the liquid crystal shutter operation between the right eye and the left eye received by the receiving unit 101 is stored in the liquid crystal shutter switching timing storage device 207 as a signal cycle for switching the liquid crystal shutter operation between the right eye and the left eye.

  If the receiving unit 101 detects that the receiving unit 101 has not received a signal for switching the liquid crystal shutter operation, the self-running circuit 208 uses the liquid crystal shutter switching timing stored in the liquid crystal shutter operation switching timing storage device 207 to Then, a control signal for switching the shutter operation between the right eye and the left eye is sent to the liquid crystal shutter control unit 105. The liquid crystal shutter control unit 105 switches the liquid crystal shutter based on the received signal, and repeats transmission and non-transmission of the left and right liquid crystal shutter units 106 alternately.

  When the receiving unit 101 detects that the liquid crystal shutter operation switching signal has not been received, a signal indicating that the receiving unit 101 has not detected the signal is sent to the transmission signal control unit 103, whereby the transmission signal control unit 103 and the transmission device 104 By stopping the operation, energy consumption can be suppressed.

According to such a configuration, the liquid crystal shutter glasses 100 are provided with the liquid crystal shutter switching timing storage device 207 and the self-propelled device 208 in the transmission device 110, so that even if the liquid crystal shutter glasses 100 cannot receive the liquid crystal shutter switching timing signal, A shutter switching operation can be performed.
Further, when the liquid crystal shutter switching signal is not received, the power consumption can be suppressed by pausing the liquid crystal shutter switching signal transmission device.

The 3D image transmission / reception apparatus according to the present invention transmits a synchronization signal for driving the liquid crystal shutter to the second and third liquid crystal shutter glasses in addition to causing the viewer to perform stereoscopic viewing by driving the liquid crystal shutter glasses. Since it is possible to provide a wide range of driving signals for the liquid crystal shutter, it is useful as a stereoscopic video viewing apparatus or the like.

DESCRIPTION OF SYMBOLS 101 Reception part 102 Decoder 103 Transmission signal control part 104 Signal transmission part 105 Liquid crystal shutter control part 106 Liquid crystal shutter spectacles 207 Operation field frequency detection and setting part 208 Operation field generation part 309 Signal source discrimination | determination part 320 External liquid crystal shutter drive signal transmitter A
321 External liquid crystal shutter drive signal transmitter B
501 Liquid crystal shutter glasses 502 Signal reception unit 503 Signal transmission device 504 Signal transmission unit 505 Stereoscopic image display device

Claims (6)

A receiving unit that receives a spatial transmission signal generated based on a signal indicating switching between left and right eye images;
Means for generating and transmitting a similar spatial transmission signal based on the received spatial transmission signal;
Means for acquiring data relating to shutter timing in the liquid crystal shutter glasses from the received spatial transmission signal;
A driving device for liquid crystal shutter glasses, comprising means for operating the shutter of the liquid crystal shutter glasses using the acquired data relating to the shutter timing. The driving device for liquid crystal shutter glasses according to claim 1,
Means for acquiring data relating to shutter timing in the liquid crystal shutter glasses from the received spatial transmission signal;
Means for holding data relating to the acquired shutter timing;
Means for operating the shutter of the liquid crystal shutter glasses using data relating to the shutter timing held under specific conditions;
An apparatus for driving liquid crystal shutter glasses, comprising: The receiving device according to claim 2,
Means to stop generating spatial transmission signals under certain conditions;
An apparatus for driving liquid crystal shutter glasses, comprising: A receiving unit that receives a spatial transmission signal generated based on a signal indicating switching between left and right eye images;
Means for generating and transmitting a spatial transmission signal different from the received signal based on the received spatial transmission signal;
Means for acquiring data relating to shutter timing in the liquid crystal shutter glasses from the received spatial transmission signal;
Means for operating the shutter of the liquid crystal shutter glasses using the data relating to the shutter timing acquired above;
An apparatus for driving liquid crystal shutter glasses, comprising: The receiving device according to claim 4,
Means capable of distinguishing the source of the received spatial transmission signal;
Means for acquiring data relating to shutter timing in the liquid crystal shutter glasses from the received spatial transmission signal;
Means for holding data relating to the acquired shutter timing;
Means for operating the shutter of the liquid crystal shutter glasses using data relating to the shutter timing held under specific conditions;
An apparatus for driving liquid crystal shutter glasses, comprising: The receiving device according to claim 5, further comprising:
Means to stop generating spatial transmission signals under certain conditions;
An apparatus for driving liquid crystal shutter glasses, comprising:

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