JP2013191994A - Display device and television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device which achieves appropriate 3D video display even if an another display device which can provide a 3D video is installed nearby and to provide a television receiver using the display device.SOLUTION: A display device changes a transmission range of a synchronization signal transmitted from the display device to the outside by considering an installation environment of the display device. When the transmission range of the synchronization signal is determined to be the prescribed installation environment, the range is limited. When the transmission range of the synchronization signal is not determined to be the prescribed installation environment, the range is not limited.

Description

  The present invention relates to a display device capable of providing 3D video and a television receiver using the display device.

  In recent years, display devices such as liquid crystal televisions, plasma televisions, and organic EL televisions are becoming 3D. In order for the user to enjoy 3D video, a display device that can alternately display right-eye and left-eye video, and a right-eye shutter and left-eye that selectively transmit the displayed right-eye and left-eye images, respectively. A display system including 3D glasses having a shutter for use has been commercialized (Patent Document 1).

  In providing this 3D image, it is necessary to synchronize the display of the right and left eye images on the display device with the opening and closing of the right and left eye shutters on the 3D glasses. In other words, the 3D glasses must open the right-eye shutter while the display device displays the right-eye image, and the 3D glasses must open the left-eye shutter while the display device displays the left-eye image. .

  The display device transmits a synchronization signal to the outside, and the 3D glasses receive the transmitted synchronization signal. By this transmission / reception, the video display of the display device and the shutter opening / closing of the 3D glasses are synchronized. As a result, the right-eye video is displayed on the user's right eye, and the left-eye video is displayed on the user's left eye, and 3D video can be provided to the user.

  In order to provide an appropriate 3D image without depending on the position where the user is using the display device, the display device is set to transmit a synchronization signal in a relatively wide range of the front and left and right.

JP 2011-252960 A

  The above-described display device is not only used in the home, but can also be used outside the home, such as mass retailers, exhibitions, and show venues. In such an out-of-home environment, there are many situations in which a plurality of the above-described display devices are installed.

  When another display device capable of providing 3D video is installed in the vicinity of one display device capable of providing 3D video, a synchronization signal transmitted from one display device to the outside is transmitted to the other display device. The situation is assumed to be received by the 3D glasses for use. For example, when two display devices capable of providing 3D images are arranged side by side and two users are viewing in front of each display device, the images are released from one display device over a wide range on the left and right. It is conceivable that the synchronized signal is erroneously received by the 3D glasses of the user viewing the other display device. In addition, a situation in which a synchronization signal transmitted to the outside from one display device causes interference with a synchronization signal transmitted to the outside from another display device, and causes malfunction in 3D glasses for other display devices. Is also envisaged. In these cases, the shutter opening / closing of the 3D glasses used by the user and the video display of the display device used by the user are not properly synchronized, and a desired 3D video cannot be provided to the user.

  The present invention has been made in view of such circumstances, and a display device and a television for realizing appropriate 3D video display even when another display device capable of providing 3D video is installed nearby. The purpose is to provide a John receiver.

  The display device according to the present invention includes a transmission unit that transmits a synchronization signal for synchronizing with the displayed video and a transmission that limits a transmission range of the synchronization signal by the transmission unit in the display device that displays the video. A range limiting unit; and a determination unit that determines whether the installation environment of the display device is a first environment or a second environment that is not the first environment, and determines that the determination unit is the first environment In this case, the transmission range restriction unit restricts the transmission range of the synchronization signal by the transmission unit, and when the determination unit determines that the second environment is the transmission range restriction unit, the transmission range restriction unit The transmission range is not limited.

  In the display device described above, it is possible to change the transmission range of the synchronization signal transmitted to the outside based on whether or not another display device is disposed in the vicinity.

  The display device according to the present invention further includes a display unit that displays the video, and the synchronization signal transmitted by the transmission unit includes 3D glasses having a video displayed by the display unit, a right-eye shutter, and a left-eye shutter. It is a signal that synchronizes shutter opening and closing, and the display of the video is composed of left-eye video and right-eye video alternately shown.

  In the above-described display device, it is possible to change the transmission range of the synchronization signal transmitted to the 3D glasses based on whether or not another 3D video-compatible display device is disposed in the vicinity.

  The display device according to the present invention further includes an insertion unit for inserting a card having information, and the determination unit has an installation environment of the display device based on information on the card inserted into the insertion unit. It is characterized by determining whether it is 1 environment.

  In the above-described display device, it is possible to determine the installation environment of the display device based on information on a card inserted into the display device. As an example of the inserted card, a conditional access system card (CAS card) used in a known digital broadcast management method can be used.

  Further, in the display device according to the present invention, when the transmission unit transmits the synchronization signal to the outside using the supplied power, and the determination unit determines that the environment is the first environment, the transmission range restriction unit Is characterized in that the power supplied to the transmission unit is smaller than the power supplied when the determination unit does not determine that it is the first environment.

  In the display device described above, it is possible to change the transmission range of the synchronization signal by using the change in the power supplied to the transmission unit.

  In the display device according to the present invention, the transmission unit includes a plurality of light emitters driven by electric power, and when the determination unit determines that the first environment is the first environment, the transmission range restriction unit The number of light emitters to be supplied is smaller than the number of light emitters when the determination unit does not determine that the first environment is present.

  In the display device described above, it is possible to change the transmission range of the synchronization signal by using the increase / decrease in the number of light emitters that transmit the synchronization signal. As an example of a light emitter that transmits a synchronization signal, a light emitting diode (LED) that transmits an infrared signal (IR signal) can be used.

  The display device according to the present invention further includes a filter whose transmittance changes, and the filter is disposed between the transmission unit and the outside, and the determination unit determines that the first environment is the first environment. In this case, the transmission range restriction unit is characterized in that the transmittance of the filter is smaller than the transmittance when the determination unit does not determine that it is the first environment.

  In the above-described display device, it is possible to change the transmission range of the synchronization signal by using the change in the transmittance of the filter disposed in front of the transmission unit in the transmission direction. As an example of a filter whose transmittance is changed, it is possible to use a conventional liquid crystal filter whose transmittance is changed by electrical operation.

  The display device according to the present invention further includes a window portion having an opening portion, and an opening area of the opening portion is changed, and the window portion is disposed between the transmission portion and the outside, When the determination unit determines that the environment is the first environment, the transmission range restriction unit reduces the opening area of the opening less than the opening area when the determination unit determines that the environment is the first environment. It is characterized by.

  In the display device described above, it is possible to change the transmission range of the synchronization signal by changing the opening area of the window portion arranged in front of the transmission direction of the transmission unit. As an example of the window portion in which the opening area changes, it is possible to use a diaphragm mechanism of a conventional camera in which the opening area changes by an electric operation.

  In the display device according to the present invention, the transmission unit includes a plurality of light emitters that are driven by electric power, including a wide range light emitter that transmits a synchronization signal over a wide range and a narrow range light emitter that transmits a synchronization signal over a narrow range. And when the determination unit determines that the first environment is the first environment, the transmission range restriction unit determines that the determination unit does not determine the power to be supplied to the wide range light emitter as the first environment. It is characterized by the fact that it is less than the power.

  In the display device described above, it is possible to change the transmission range of the synchronization signal by using the change in the type of the light emitter that transmits the synchronization signal.

  The display device according to the present invention is characterized in that the wide range has a wider range in the direction perpendicular to the direction from the transmission unit to the outside than the narrow range.

  In the display device described above, it is possible to limit the transmission of the synchronization signal in the horizontal direction perpendicular to the forward direction, which is the transmission direction of the synchronization signal.

  The display device according to the present invention further includes another wide range light emitter that transmits a synchronization signal over a wide range, and the transmission directions of the wide range light emitter, the narrow range light emitter, and the other wide range light emitter are the same, The narrow-range light emitter is arranged between the wide-range light emitter and the other wide-range light emitter.

  In the above-described display device, it is possible to increase the amount of change in the transmission range in spite of a small number of light emitters.

  A television receiver according to the present invention includes the above-described display device and a receiving unit that receives a television broadcast, and the display device displays an image based on the television broadcast received by the receiving unit. It is characterized by that.

  The above-described television receiver can change the transmission range of the synchronization signal transmitted to the outside based on whether or not another device that performs display is arranged in the vicinity.

  In the present invention, the transmission range of the synchronization signal transmitted from the display device is changed in consideration of the environment in which the display device is installed. Accordingly, when another display device exists in the vicinity, the synchronization signal transmitted from the display device to the outside is erroneously received by the 3D glasses of the other display device by narrowing the transmission range of the synchronization signal. The effect which prevents can be expected. In addition, when there is no other display device in the vicinity, an effect of ensuring a wide range in which the synchronization signal can be received can be expected by not narrowing the transmission range of the synchronization signal. In other words, not only in the home, but also when used outside the home, such as mass retailers, exhibitions, and show venues, it is expected to have an effect of providing appropriate 3D video to the user using a single display device. it can.

It is the schematic diagram which showed one structural example of the display system which consists of 3D glasses and a display apparatus. It is the block diagram which showed the example of 1 structure of the display apparatus. It is the block diagram which showed the example of 1 structure of 3D glasses. It is the flowchart which showed the process sequence which concerns on installation environment judgment. It is a schematic diagram which shows the restriction | limiting of the synchronous signal transmission by a control part. It is a schematic diagram which shows the other structural example of the restriction | limiting by a control part. It is a schematic diagram which shows the other structural example of the restriction | limiting by a control part. It is a schematic diagram which shows the other structural example of the restriction | limiting by a control part. It is a schematic diagram which shows the other structural example of the restriction | limiting by a control part. It is a schematic diagram which shows the other structural example of the restriction | limiting by a control part.

  Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof.

  FIG. 1 is a schematic diagram illustrating a configuration example of a display system including 3D glasses and a display device. The display system according to the embodiment includes a display device 1 that displays right-eye and left-eye images, a right-eye shutter 24 that selectively transmits right-eye and left-eye images displayed on the display device 1, and 3D glasses 2 having a left-eye shutter 25. The display device 1 is an example of a display device according to the present invention.

  FIG. 2 is a block diagram illustrating a configuration example of the display device 1. The display device 1 includes a control unit 10, a video input unit 11, a tuner unit 12, an AV switch 13, a signal processing unit 14, a display unit 15, a speaker 16, a synchronization signal transmission unit 17, and a CAS card insertion unit 18.

  The control part 10 consists of a microcomputer provided with CPU, ROM, RAM, etc., gives a control signal to each structure part of the display apparatus 1, and controls operation | movement of this structure part.

  The video input unit 11 is an input interface to which 3D video signals and audio signals output from various external devices (not shown) are input, and supplies the input video signals and audio signals to the AV switch 13. The external device includes, for example, a tuner such as a satellite broadcast tuner, a cable TV tuner, and an IP broadcast tuner, and a video playback device such as a BD recorder and an HDD recorder. The 3D video signal is transmitted, for example, in a side-by-side format. In the side-by-side format, one frame for the right-eye video and one frame for the left-eye video are compressed in half (1/2) in the horizontal direction, and each frame is placed side by side. A transmission method for transmitting as a frame. Since one frame in which the video for the right eye and the video for the left eye are arranged can be transmitted in the same manner as the 2D video, the existing infrastructure can be used. Needless to say, the present invention can also be applied to other transmission schemes, for example, 3D video received by transmission schemes in which one frame for right-eye video and one frame for left-eye video are transmitted separately. .

  The tuner unit 12 amplifies the broadcast signal received by the antenna A and selects a signal of a specific channel. The selected signal is modulated by an Orthogonal Frequency Division Multiplexing (OFDM). The tuner unit 12 includes a demodulating unit (not shown), demodulates the signal of the selected specific channel into data in the MPEG2 transport stream (TS) format, and gives the demodulated data to the AV switch 13. Data in the TS format is composed of a plurality of packets. A packet is a packetized 3D video signal and audio signal that constitute a program, and a video signal and audio signal in time series order are restored from a plurality of packets. The tuner unit 12 functions as a receiving unit according to the present invention. In addition, the tuner unit 12 functions as a television receiver according to the present invention.

  The AV switch 13 selects either the video signal and audio signal supplied from the video input unit 11 or the stream data supplied from the tuner unit 12 according to the control described later performed by the control unit 10, and the selected video The signal and audio signal or stream data are output to the signal processing unit 14.

  When the video signal and the audio signal output from the video input unit 11 are given, the signal processing unit 14 is for the right eye that horizontally expands the right half of the side-by-side one frame video. The left eye image is generated by horizontally expanding the image and the left half image, and the right eye image and the left eye image are displayed on the display unit 15 in a frame sequential manner. Further, the sound is externally output by giving the sound signal to the speaker 16.

  When the stream data is given, the signal processing unit 14 separates the stream data into video and audio data, and demodulates the data according to the MPEG2 compression / decompression method to generate the original video signal and audio signal. Then, the signal processing unit 14 causes the display unit 15 to display the right-eye video and the left-eye video on the generated video signal in the frame sequential manner by the same processing as described above.

  The signal processing unit 14 provides the synchronization signal transmission unit 17 with a synchronization signal indicating the timing at which the right-eye video and the left-eye video are displayed. This synchronization signal is a signal for synchronizing the opening and closing of the shutter of the 3D glasses 2 received via the synchronization signal transmission unit 17.

  The display unit 15 includes, for example, a liquid crystal panel, a plasma display panel, an organic EL panel, and the like, and displays an image based on the video signal provided from the signal processing unit 14.

  The speaker 16 generates sound by changing the electrical signal into physical vibration, and outputs sound based on the sound signal given from the signal processing unit 14.

  The synchronization signal transmission unit 17 is configured using a so-called IR emitter circuit, and transmits the synchronization signal given from the signal processing unit 14 to the 3D glasses 2 wirelessly. In addition, although the synchronizing signal transmission part 17 is provided in the center lower part of the rectangular cabinet-shaped front cabinet as shown in FIG. 1, it is not limited to this in particular. A more detailed configuration of the synchronization signal transmission unit 17 will be described later.

  The CAS card insertion unit 18 reads information on the inserted CAS card, and gives the read information to the control unit 10. The CAS card insertion part 18 functions as an insertion part according to the present invention.

  The CAS card is a card for preventing viewing by non-contractors by using encryption technology. B-CAS card used for content management of terrestrial / BS / 110 degree CS broadcasting in Japan, digital cable television broadcasting in Japan A plurality of types of CAS cards such as C-CAS cards used for content management are known. If an appropriate CAS card is not inserted into the CAS card insertion unit 18, the desired content cannot be viewed.

  Depending on the environment in which the display device is installed, multiple types of CAS cards are also known. For example, a home CAS card used in a display device installed in a general home and a display CAS card used in a display device installed for display in a mass sales store are known. The operation of the display device differs depending on whether a home CAS card or an exhibition CAS card is inserted. For example, when a home CAS card is inserted, a screen prompting payment of charges for predetermined content viewing may be displayed. When an exhibition CAS card is inserted, a screen prompting such charge payment is displayed. Not.

  Exhibit CAS cards can be used not only at mass merchandisers, but also at technology announcement venues, demonstration exhibition venues, and show venues. Therefore, there is a high possibility that another display device capable of providing 3D video is present in the vicinity of the display device in which the display CAS card is inserted. On the other hand, when a household CAS card is inserted, there is a low possibility that another display device capable of providing 3D video is present in the vicinity.

  In the present embodiment, the installation environment of the display device is determined based on the difference in information read from the inserted CAS card. Separately, an installation signal transmission unit that transmits an installation signal other than the synchronization signal and an installation signal reception unit that receives an installation signal transmitted by another display device are provided, and the installation environment is determined based on transmission and reception of the installation signal. It is also possible. In addition, a global positioning system (GPS) can be introduced and the installation environment can be determined based on position information indicated by the GPS. For example, it is possible to determine whether the position information indicated by GPS indicates a mass retailer, an exhibition hall, or a general private house.

  Based on the information given from the CAS card insertion unit 18, the control unit 10 determines the installation environment of the display device. For example, when a display CAS card is inserted, it is determined that there is another display device capable of providing 3D video, and transmission of the synchronization signal by the synchronization signal transmission unit 17 is restricted. When a home CAS card is inserted, it is determined that there is no other display device capable of providing 3D video, and transmission of the synchronization signal by the synchronization signal transmission unit 17 is not limited. The control unit 10 functions as a determination unit according to the present invention. Further, the control unit 10 functions as a transmission range limiting unit according to the present invention. A configuration in which the installation environment is determined based on information of a card other than the CAS card may be employed. The details of the restriction by the control unit 10 will be described later.

  FIG. 3 is a block diagram illustrating a configuration example of the 3D glasses 2. The 3D glasses 2 include a 3D glasses controller 20, an oscillation circuit 21, a synchronization signal receiver 22, a shutter driver 23, a right eye shutter 24, and a left eye shutter 25.

  The oscillation circuit 21 is a circuit that operates the 3D glasses control unit 20, generates a reference clock for opening and closing the right eye shutter 24 and the left eye shutter 25, and outputs the generated clock to the 3D glasses control unit 20. .

  The synchronization signal receiving unit 22 includes, for example, a photodiode, and opens and closes the right eye shutter 24 and the left eye shutter 25 in synchronization with the right eye image and the left eye image displayed on the display unit 15. The synchronization signal transmitted from the display device 1 is received, and the received synchronization signal is given to the 3D glasses controller 20.

  The 3D glasses controller 20 synchronizes with the synchronization signal output from the synchronization signal receiver 22 and supplies the shutter driver 23 with shutter control signals for alternately opening and closing the right eye shutter 24 and the left eye shutter 25. The shutter control signal for the right eye is, for example, a rectangular wave signal having a frequency of 120 Hz and a duty ratio of 50%, and the shutter control signal for the left eye shutter 25 inverts the phase of the shutter control signal for the right eye, that is, changes the phase. The signal is shifted by 180 degrees.

  The shutter drive unit 23 supplies drive power to the right-eye shutter 24 and the left-eye shutter 25 based on the shutter control signal given from the 3D glasses control unit 20.

  The right-eye shutter 24 and the left-eye shutter 25 are, for example, liquid crystal shutters, and open and close alternately according to the drive power supplied from the shutter drive unit 23. Specifically, when a right-eye image is displayed on the display unit 15, the left-eye shutter 25 is closed, and only the right-eye shutter 24 is opened to transmit the right-eye image. Similarly, when a left-eye image is displayed on the display unit 15, the right-eye shutter 24 is closed and the left-eye shutter 25 is opened to transmit the left-eye image. In this way, the right eye image is displayed on the user's right eye, and the left eye image is displayed on the left eye. As a result, 3D video can be provided to the user.

  FIG. 4 is a flowchart showing a processing procedure relating to installation environment determination. The CAS card insertion unit 18 reads the information of the inserted CAS card (step S11), and gives the read information to the control unit 10 (step S12). Based on the given information, the control unit 10 determines whether the installation environment of the display device is the first environment or the second environment (step S13). For example, if the given information indicates the insertion of an exhibition CAS card, it is determined that the display environment is a first environment where there is a high possibility that another display device capable of providing 3D video is present in the vicinity. When the given information indicates the insertion of a household CAS card, it is determined that the second environment is unlikely to have another display device capable of providing 3D video in the vicinity. If it is determined that the environment is the first environment (step S13: YES), the control unit 10 restricts the transmission of the synchronization signal transmission unit 17 (step S14), and ends the process related to the installation environment determination. When it is not determined that the environment is the first environment, for example, when it is determined that the environment is the second environment (step S13: NO), the control unit 10 determines the installation environment without limiting the transmission of the synchronization signal transmission unit 17. This process is terminated. A configuration is also possible in which the transmission of the synchronization signal transmission unit 17 is restricted in advance and the restriction is removed when it is determined that the environment is the second environment. Moreover, when it is judged that it is the 2nd environment, the structure which increases transmission of the synchronous signal transmission part 17 is also possible.

  FIG. 5 is a schematic diagram showing the limitation on the synchronization signal transmission by the control unit 10, and shows a mode in which the transmission of the synchronization signal transmission is limited when it is determined in step S13 that it is the first environment. The case where the synchronization signal transmission unit 17 is configured by the LED 17a that transmits the IR signal is described, and the wavy line in the figure indicates the transmission range of the synchronization signal (IR signal) transmitted from the LED 17a.

  If it is determined in step S13 that the environment is the first environment, the control unit 10 reduces the amount of power supplied to the LED 17a from the specified amount. Thereby, the intensity | strength of IR signal transmitted from LED17a reduces from a regulation intensity | strength, and the transmission range (front and the range of the left-right direction) becomes narrower than a regulation range. On the other hand, if it is determined in step S13 that the environment is the second environment, the control unit 10 supplies a specified amount of power to the LED 17a. As a result, an IR signal having a specified intensity is transmitted from the LED 17a, and reception by the 3D glasses 2 is possible over the entire specified range. This is effective for an environment in which other display devices are provided close to the front and left and right directions of the display device.

  FIG. 6 is a schematic diagram illustrating another configuration example of the restriction by the control unit 10 and illustrates an aspect in which transmission of synchronization signal transmission is restricted when it is determined in step S13 that the environment is the first environment. The case where the synchronization signal transmission unit 17 is configured by a plurality of LEDs 17b, 17c, and 17d arranged in parallel on the left and right is described. The wavy line in the figure indicates the transmission of the synchronization signal transmitted from the LEDs 17b, 17c, and 17d. The range is shown. The LEDs 17b, 17c, and 17d function as a plurality of light emitters according to the present invention.

  When it is determined in step S13 that the environment is the first environment, the control unit 10 does not supply power to all the LEDs in the synchronization signal transmission unit 17. For example, power is supplied only to the center LED 17c without supplying power to the LEDs 17b and 17d at the left and right ends. As a result, the number of LEDs that transmit the synchronization signal is reduced from the specified number, and the transmission range (mainly the transmission range in the left-right direction rather than the front-rear direction) becomes narrower than the specified range. On the other hand, when it is determined in step S <b> 13 that the environment is the second environment, the control unit 10 supplies power to all the LEDs in the synchronization signal transmission unit 17. As a result, a synchronization signal is transmitted from a specified number of LEDs, and reception by the 3D glasses 2 is possible over the entire specified range. Although another display device is provided close to the left and right directions of the display device, it is effective for an environment where no other display device is provided in front of the display device.

  FIG. 7 is a schematic diagram illustrating another configuration example of the restriction by the control unit 10 and illustrates an aspect in which transmission of synchronization signal transmission is restricted when it is determined in step S13 that the environment is the first environment. The case where the liquid crystal filter 17e is arranged in front of the synchronization signal transmission unit 17 provided with a plurality of LEDs 17b, 17c, and 17d in the left-right direction is described. The wavy lines in the figure are from the LEDs 17b, 17c, and 17d. The transmission range of the synchronization signal to be transmitted is shown.

  The liquid crystal filter 17e is the same as the liquid crystal filter used for the right-eye shutter 24 and the left-eye shutter 25, and the transmittance is changed by an electrical operation. The liquid crystal filter 17e functions as a filter according to the present invention in which the transmittance changes.

  If it is determined in step S13 that the environment is the first environment, the control unit 10 gives a control signal to the liquid crystal filter 17e to reduce the transmittance of the liquid crystal filter 17e below a specified value. As a result, there is no change in the intensity of the synchronization signal transmitted from the LEDs 17b, 17c, and 17d, but the intensity of the synchronization signal that passes through the liquid crystal filter 17e is reduced from the specified intensity, and the transmission range (front and left and right direction) is reduced. Range) is narrower than the specified range. On the other hand, if it is determined in step S13 that the environment is the second environment, the control unit 10 gives a control signal to the liquid crystal filter 17e to set the transmittance of the liquid crystal filter 17e to a specified value. As a result, the synchronization signal having the prescribed intensity passes through the liquid crystal filter 17e, and can be received by the 3D glasses 2 over the entire prescribed range. This is effective for an environment in which other display devices are provided close to the front and left and right directions of the display device.

  FIG. 8 is a schematic diagram illustrating another configuration example of the restriction by the control unit 10 and illustrates an aspect in which transmission of synchronization signal transmission is restricted when it is determined in step S13 that the environment is the first environment. The case where the window opening mechanism 17g is arranged in front of the synchronization signal transmission unit 17 provided with a plurality of LEDs 17b, 17c, and 17d in the left-right direction is described. The wavy lines in the figure indicate the LEDs 17b, 17c, and 17d. The transmission range of the synchronization signal transmitted from is shown.

  The window opening mechanism 17g is disposed between the housing 17f that covers the synchronization signal transmission unit 17 and the LEDs 17b, 17c, and 17d. It has a structure like a diaphragm of a conventional camera, and an attached motor is driven by an electric operation, and the area of the opening changes. The window opening mechanism 17g functions as a window portion according to the present invention.

  If it is determined in step S13 that the environment is the first environment, the control unit 10 gives a control signal to the window opening mechanism 17g to reduce the opening area of the window opening mechanism 17g below a specified value. Thereby, the spread in the left-right direction of the synchronization signal passing through the window opening mechanism 17g is reduced from the specified spread, and the transmission range (mainly the transmission range in the left-right direction, not the front-rear direction) becomes narrower than the specified range. On the other hand, if it is determined in step S13 that the environment is the second environment, the control unit 10 controls the window opening mechanism 17g to have a predetermined opening area. As a result, a synchronization signal having a specified spread is transmitted via the window opening mechanism 17g, and reception by the 3D glasses 2 in the entire specified range becomes possible. Although another display device is provided close to the left and right directions of the display device, it is effective for an environment where no other display device is provided in front of the display device.

  FIG. 9 is a schematic diagram illustrating another configuration example of the restriction by the control unit 10, in which the transmission of the synchronization signal transmission is restricted when the first environment is determined in step S <b> 13 (pattern 1 and pattern 2). ). The case where the synchronization signal transmission unit 17 is configured by arranging a plurality of LEDs 17h and 17i in the vertical direction has been described, and the wavy line in the figure indicates the transmission range of the synchronization signal transmitted from the LEDs 17h and 17i. Yes.

  The synchronization signal transmission unit 17 is composed of a wide range LED 17h and a narrow range LED 17i that are provided side by side. When comparing the wide range LED 17h and the narrow range LED 17i, the narrow range LED 17i is wider than the wide range LED 17h in the forward synchronization signal transmission range. On the other hand, the wide-range LED 17h is wider than the narrow-range LED 17i in the sync signal transmission range in the left-right direction. When transmitting waves such as light and sound, even if the transmitted energy is the same, if the left and right diffusion of the wave is suppressed at the source, the distance to the left and right is shortened, but the distance to the front is increased. In the case where left-right diffusion is not suppressed, the distance to the left and right is increased, but the distance to the front is shortened. The wide range LED 17h functions as a wide range light emitter according to the present invention. The narrow range LED 17i functions as a narrow range light emitter according to the present invention.

  When it is determined in step S13 that the environment is the first environment, the control unit 10 does not supply power to all the LEDs 17h and 17i in the synchronization signal transmission unit 17. That is, power is not supplied to one of the wide range LED 17h or the narrow range LED 17i. When power is not supplied to the wide range LED 17h (Pattern 1 in FIG. 9), the synchronization signal transmission range in the forward direction does not change from the specified range, but the synchronization signal transmission range in the left-right direction becomes narrower than the specified range. In addition, when power is not supplied to the narrow range LED 17i (pattern 2 in FIG. 9), the synchronization signal transmission range in the left-right direction does not change from the specified range, but the synchronization signal transmission range in the forward direction becomes narrower than the specified range. On the other hand, when it is determined in step S13 that the environment is the second environment, the control unit 10 supplies power to the wide range LED 17h and the narrow range LED 17i. As a result, reception by the 3D glasses 2 over the entire specified range becomes possible. Depending on the installation environment, not only whether or not another display device is installed close to the display device in the left-right direction, but also whether or not another display device is installed in front of the display device. An effective change of the transmission range can be expected with a single display device. When it is determined that the environment is the first environment, not only the power supply to one LED is completely stopped but also a configuration for reducing the power supply can be used.

  FIG. 10 is a schematic diagram illustrating another configuration example of the restriction by the control unit 10, in which the transmission of the synchronization signal transmission is restricted when the first environment is determined in step S <b> 13 (pattern 3 and pattern 4). ). The case where the synchronization signal transmitting unit 17 is configured by arranging a plurality of LEDs 17j, 17k, 17l in the left-right direction has been described. The wavy lines in the figure indicate the transmission of the synchronization signal transmitted from the LEDs 17j, 17k, 17l. The range is shown.

  The synchronization signal transmission unit 17 includes a wide range LED 17j disposed on the left, a wide range LED 17l disposed on the right, and a narrow range LED 17k disposed between the two wide range LEDs. When comparing the wide range LEDs 17j and 17l with the narrow range LED 17k, the forward synchronization signal transmission range is wider in the narrow range LED 17k than in the wide range LEDs 17j and 17l. On the other hand, the sync signal transmission range in the left-right direction is wider in the wide range LEDs 17j and 17l than in the narrow range LED 17k. The wide range LEDs 17j and 17l function as a wide range light emitter according to the present invention. The narrow range LED 17k functions as a narrow range light emitter according to the present invention.

  If it is determined in step S13 that the environment is the first environment, the control unit 10 does not supply power to all the LEDs 17j, 17k, and 17l in the synchronization signal transmission unit 17. That is, power is not supplied to one of the left and right wide range LEDs 17j and 17l or the narrow range LED 17k. When power is not supplied to the left and right wide range LEDs 17j and 17l (pattern 3 in FIG. 10), the synchronization signal transmission range in the forward direction does not change from the specified range, but the synchronization signal transmission range in the left and right direction becomes narrower than the specified range. When power is not supplied to the narrow range LED 17k (pattern 4 in FIG. 10), the left and right direction synchronization signal transmission range does not change from the specified range, but the forward direction synchronization signal transmission range becomes narrower than the specified range. On the other hand, when it is determined in step S13 that the environment is the second environment, the control unit 10 supplies power to the left and right wide range LEDs 17j and 17l and the narrow range LED 17k. As a result, reception by the 3D glasses 2 over the entire specified range becomes possible. Depending on the installation environment, not only whether or not another display device is installed close to the display device in the left-right direction, but also whether or not another display device is installed in front of the display device. An effective change of the transmission range can be expected with a single display device. In addition, by using this arrangement, the amount of change in the synchronization signal transmission range can be increased despite a small number of LEDs.

  The embodiments disclosed herein are illustrative in all respects and should not be considered as restrictive. The plurality of configurations related to the transmission range restriction exemplified above can be used in combination with other configuration examples. The scope of the present invention is defined by the scope of the claims as well as the contents exemplified above, and is intended to include any modifications within the scope and meaning equivalent to the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Display apparatus 2 3D glasses 10 Control part 11 Video | video input part 12 Tuner part 13 AV switch 14 Signal processing part 15 Display part 16 Speaker 17 Synchronization signal transmission part 17a-d LED
17e Liquid crystal filter 17f Housing 17g Window opening mechanism 17hl LED
18 CAS Card Insertion Unit 20 3D Glasses Control Unit 21 Oscillation Circuit 22 Synchronization Signal Receiving Unit 23 Shutter Drive Unit 24 Right Eye Shutter 25 Left Eye Shutter

Claims (11)

In a display device that displays video,
A transmission unit for transmitting a synchronization signal for synchronizing with the displayed video to the outside;
A transmission range limiting unit for limiting a transmission range of the synchronization signal by the transmission unit;
A determination unit that determines whether an installation environment of the display device is a first environment or a second environment that is not the first environment;
When determining that the determination unit is the first environment, the transmission range restriction unit restricts the transmission range of the synchronization signal by the transmission unit,
The display device, wherein when the determination unit determines that the environment is the second environment, the transmission range restriction unit does not restrict a transmission range of a synchronization signal by the transmission unit. A display unit for displaying the video;
The synchronization signal transmitted by the transmission unit is a signal for synchronizing the video displayed by the display unit with the opening / closing of 3D glasses having a right-eye shutter and a left-eye shutter,
The display device according to claim 1, wherein the display of the video is configured by a left-eye video and a right-eye video alternately shown. An insertion portion for inserting a card having information;
The said discrimination | determination part discriminate | determines whether the installation environment of the said display apparatus is the said 1st environment based on the information of the card | curd inserted in the said insertion part. Display device. The transmission unit transmits the synchronization signal to the outside using supplied power,
When the determination unit determines that the environment is the first environment, the transmission range restriction unit supplies power to the transmission unit, and when the determination unit does not determine that the environment is the first environment, The display device according to any one of claims 1 to 3, wherein the display device decreases. The transmitter is composed of a plurality of light emitters driven by electric power,
When the determination unit determines that the first environment is present, the transmission range restriction unit emits light when the determination unit does not determine that the number of light emitters to which power is supplied is the first environment. The display device according to claim 1, wherein the display device is smaller than the number of bodies. It further comprises a filter whose transmittance changes,
The filter is disposed between the transmitter and the outside,
When the determination unit determines that the environment is the first environment, the transmission range restriction unit reduces the transmittance of the filter from the transmittance when the determination unit does not determine that the environment is the first environment. The display device according to claim 1, wherein the display device is a display device. An opening, and further comprising a window that changes the opening area of the opening;
The window is disposed between the transmitter and the outside,
When the determination unit determines that the environment is the first environment, the transmission range restriction unit reduces the opening area of the opening to be smaller than the opening area when the determination unit determines that the environment is the first environment. The display device according to claim 1, wherein the display device is a display device. The transmitter is composed of a plurality of light emitters that are driven by electric power, including a wide range light emitter that transmits a synchronization signal over a wide range and a narrow range light emitter that transmits a synchronization signal over a narrow range,
When it is determined that the determination unit is in the first environment, the transmission range restriction unit determines the power supplied to the wide range light emitter from the power when the determination unit does not determine that it is in the first environment. The display device according to claim 1, wherein the display device also decreases. The display device according to claim 8, wherein the wide range has a wider range in a direction perpendicular to the direction from the transmission unit to the outside than the narrow range. It further includes another wide range light emitter that transmits a synchronization signal over a wide range,
The transmission direction of the wide range light emitter, the narrow range light emitter, and the other wide range light emitters are the same,
The display device according to claim 8, wherein the narrow-range light emitter is disposed between the wide-range light emitter and the other wide-range light emitter. A display device according to any one of claims 1 to 9,
A receiver for receiving television broadcasts,
The television receiver, wherein the display device displays an image based on the television broadcast received by the receiving unit.

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