JP2012032449A - Video display device, video display system, and video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video display technology capable of handling a plurality of video display devices with shutter glasses even though collision of communications is not measured.SOLUTION: The present invention relates to a video display device which includes: signal transmitting means for transmitting a signal to shutter glasses having shutters capable of shutting off video images incident to right and left eyes when a user wears the shutter glasses; code holding means for holding a code peculiar for opening/closing the shutter glasses to be transmitted as the signal; and display means for displaying an image, and in which the code is set to be transmitted in non-periodical timing. Furthermore, the invention also relates to a video display method including: inputting a first image group and a second image group having a parallax from the first image group; displaying these images; and transmitting to the shutter glasses having the shutters capable of shutting off respective video images incident to the right and left eyes when the user wears the shutter glasses, the code peculiar for opening/closing the shutter glasses in the non-periodical timing.

Description

  Embodiments described herein relate generally to a video display device, a video display system, and a video display method that perform stereoscopic display using shutter glasses.

  In recent years, with the development of video display technology, a stereoscopic video display system that can provide a stereoscopic video to a user has been proposed. Among these stereoscopic video display systems, there is a stereoscopic video display method using shutter glasses as one of methods for allowing a user to recognize a stereoscopic video.

  In the stereoscopic image display method using shutter glasses, the left eye image and the right eye image having parallax are displayed on a single display device at different timings, and the opening / closing of the shutter of the shutter glasses is controlled. By showing the image to the user only to the left eye and the right eye image only to the right eye, the user can recognize the image displayed on the display device as a three-dimensional image.

  However, there are a plurality of display devices in the case of a demonstration or a store, and when the opening / closing of the shutters of a corresponding plurality of shutter glasses is controlled, a communication collision problem occurs. To solve this problem, for example, in infrared communication between data processing devices, the number of communication collisions is measured. If the number is smaller than the predetermined number, after waiting for a waiting time due to random number generation, infrared wireless communication starts communication again. A control system has been proposed (see Patent Document 1).

  On the other hand, there is a demand not to measure a communication collision, but a means for realizing such a demand is not known.

Japanese Patent Laid-Open No. 11-24810

  An object of the present invention is to provide a video display technique capable of operating a plurality of video display devices with shutter glasses without measuring a communication collision.

  In order to solve the above-described problem, according to the video display device of the embodiment, the input unit that inputs the first image group and the second image group that is an image group having parallax with the first image group; A signal transmission means for transmitting a signal to shutter glasses having a shutter capable of blocking images incident on the right eye and the left eye when the user wears, and for opening and closing the shutter glasses transmitted as the signal Code holding means for holding a unique code and display means for displaying an image are provided, and the code is set to be transmitted at an irregular timing.

The block diagram which shows an example of the internal structure of the three-dimensional video display system in one Embodiment of this invention. The flowchart of the process of the shutter control part 9 of the embodiment. The schematic diagram of the light emission timing shown in order to demonstrate the effect of the embodiment. The schematic diagram of opening and closing of the shutter of the shutter glasses of the embodiment. Explanatory drawing which shows the case where several TV used for the embodiment adjoins. Explanatory drawing which shows the transmission timing of the conventional code | symbol. The flowchart of control of the shutter eyeglasses 13 of embodiment. 1 is a diagram illustrating an example of an overview of a stereoscopic video display system according to an embodiment of the present invention. 1 is a block diagram schematically showing the configuration of a television receiver according to an embodiment of the present invention.

Embodiments according to the present invention will be described below with reference to FIGS.
FIG. 8 is a diagram showing an example of an overview of the stereoscopic video display system 11 in the present embodiment. FIG. 8 shows a stereoscopic video display system 11, a video display device 12, and shutter glasses 13.

  The stereoscopic video display system 11 includes a video display device 12 and shutter glasses 13. The user can recognize the video as a stereoscopic video by wearing the shutter glasses 13 and viewing the video displayed on the video display device 12.

  Humans usually view an object with the left eye and the right eye, which are located at different positions, and there are parallaxes in the images seen with the left eye and the right eye. By synthesizing the image seen with the left eye and the image seen with the right eye in the brain where the parallax exists, a human can recognize the object being viewed as a solid. Therefore, by displaying the left-eye image and the right-eye image having parallax with each eye, it is possible to make the user perceive the video as a three-dimensional image.

  The video display device 12 is, for example, a digital television, and can display a stereoscopic video to a user wearing the shutter glasses 13 by alternately displaying a left-eye image and a right-eye image having parallax with each other. The video display device 12 also has a function of generating a new image based on the received image signal for stereoscopic video display.

  The shutter glasses 13 have a left-eye lens 14 and a right-eye lens 15. The left-eye lens 14 and the right-eye lens 15 are each provided with a light-shieldable shutter, and the user opens and closes the shutter at different timings based on the shutter opening / closing signals received from the video display device 12. 3D images are provided. For example, when a left-eye image is displayed on the video display device 12, the shutter glasses 3 closes the shutter of the right-eye lens 15 and opens the left-eye lens 14 based on an open / close signal from the video display device 12. The left eye image is shown only to the user's left eye. When the right-eye image is displayed, the shutter of the left-eye lens 14 is closed and the right-eye lens 15 is opened, so that the right-eye image is shown only to the user's right eye. By doing so, the user can grasp the image being viewed as a solid.

(Configuration and operation of broadcast receiver)
First, a television receiver according to an embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a block diagram showing an example of the configuration of a television receiver such as a digital broadcast receiver which is an embodiment of a broadcast receiver to which the system of FIG. 1 described later is applied.
This television receiver can receive terrestrial analog broadcast waves, BS, CS, and terrestrial digital broadcast waves, and includes a microprocessor 10, a digital tuner 11, an analog tuner 12, a digital demodulator 13, and an analog demodulator. 14 and TS decoder 15 are provided.

  BS, CS, and terrestrial digital broadcast waves are received by the antenna 1, and this received signal is supplied to the digital tuner 11. Similarly, the terrestrial analog broadcast wave is received by the antenna 1, and this received signal is supplied to the analog tuner 12. The digital tuner 11 and the analog tuner 12 employ a phase-locked loop (PLL) system, and select desired broadcast waves by designating reception parameters such as a center frequency and a bandwidth under the control of the microprocessor 10. Used for.

  For example, in the case of Japanese terrestrial digital broadcasting, the received signal of the broadcast wave selected by the digital tuner 11 is sequentially supplied to an OFDM (orthogonal frequency division multiplexing) digital demodulator 13 and a TS decoder 15. Demodulated and decoded into digital video and audio signals. The received signal selected by the analog tuner 12 is supplied to an analog demodulator 14 where it is demodulated into an analog video signal and an audio signal.

  The television receiver further includes a signal processing unit 16, a graphic processing unit 17, an OSD (on screen display) signal generation unit 18, a video processing unit 19, a display 20, an audio processing unit 21, a speaker 22, an operation panel 23, an infrared ray. A transmission unit 24, an infrared light receiving unit 25, a flash memory 26, a USB (Universal Serial Bus) connector 27, a card connector 28, and a network communication circuit 29 are provided. The signal processing unit 16 selectively performs predetermined digital signal processing on the digital video signal and the audio signal from the TS decoder 15 and outputs them to the graphic processing unit 17 and the audio processing unit 21, respectively. The signal processing unit 16 selectively digitizes the analog video signal and the audio signal from the analog demodulator 14, performs predetermined digital signal processing on the digitized video signal and audio signal, The data is output to the graphic processing unit 17 and the audio processing unit 21.

  The graphic processing unit 17 selectively superimposes the OSD signal generated by the OSD signal generation unit 18 on the digital video signal output from the signal processing unit 16 and outputs it. The video processing unit 19 performs conversion such as size adjustment for adapting to the display 20 with respect to the digital video signal output from the graphic processing unit 17. The display 20 displays a video corresponding to the video signal output from the video processing unit 19. The audio processing unit 21 performs conversion such as volume adjustment for adapting the digital audio signal output from the signal processing unit 16 to the speaker 22. The speaker 22 reproduces sound corresponding to the sound signal output from the sound processing unit 21.

The microprocessor 10 receives the operation information from the operation panel 23 or the operation information transmitted and received from a remote controller (not shown), and controls each component so that the operation content is reflected. Here, the operation panel or keyboard 23 and the remote controller 25 correspond to an operation module that functions as a user interface. As shown in FIG. 11, the microprocessor 10 includes a central processing unit (CPU) 31 that performs various processes and controls, a ROM (read only memory) 32 that holds a control program for the CPU 31 and various initial data, A random access memory (RAM) 33 that provides a work area for temporarily storing input / output information, an interface 34 that inputs / outputs setting information and control information for each component via an I ² C bus, etc., and broadcast waves and networks A clock circuit 35 is included that is corrected according to the time information and date information acquired via the route.

  The USB connector 27 is provided for connecting various USB devices. The card connector 28 is provided for connecting various media cards. The network communication circuit 29 is connected to the Internet directly or via a LAN (local area network). When the time information is acquired from the broadcast wave, the signal is received by the antenna 1, and when the basic data such as time information is acquired from the network, the time information is acquired by the microprocessor 10 from the network communication circuit 29.

The USB connector 27 and the card connector 28 can read a moving image, a photograph, and music data by connecting a USB device (memory or the like) or a media card from the outside.
The microprocessor 10 captures a video held as a file in a USB memory connected to the USB connector 27 or a media card connected to the card connector 28, and the signal processing unit 16, the graphic processing unit 17, and the video processing unit 19 Through this process, control is performed to display each image on the display 20.

  In addition, regarding the following FIG. 1, although the description corresponding to the hard disk H is omitted, it may be provided as the USB device and constitute a storage medium. Also, the video or audio being viewed may be reproduced from the content recorded therein.

The code holding unit 5 and the display control unit 2 may be configured around the CPU 31 of the microprocessor 10, the ROM 32 and the RAM 33, and the video processing unit 19, for example.
(Example)
FIG. 1 is a block diagram showing an example of the internal functional configuration of the stereoscopic video display system 11 in the present embodiment.
As shown in FIG. 1, the stereoscopic TV / video display device 12 includes a tuner 1, a cord holding unit 5, a display control unit 2, an L / R open / close signal light emitting unit 4 (corresponding to the infrared transmission unit 24), and a display unit. 3 (corresponding to the display 20), for example, can receive a transmitted broadcast signal and provide a stereoscopic video to the user.

The tuner 1 has a function as input means for decoding a broadcast signal received by an antenna and inputting the decoded signal into the video display device 12.
The display control unit 2 has a function of causing the display unit 3 to display image data obtained by demodulating and digitizing the decoded signal. At this time, the display control unit 2 controls the display time of each image in the image data. It is preferable that the time for displaying one image is a half of the cycle in which the left eye image and the right eye image are taken. For example, if the left-eye imaging and the right-eye imaging are each continuously captured at a 1/60 second period, the video display device 12 switches the displayed image every 1/120 second. Further, the display control unit 2 transmits a signal related to the opening / closing of the shutter glasses 13 to the L / R opening / closing signal light emitting unit 4 as a light emission timing so that the shutter glasses 13 open / close the shutter in synchronization with the switching of the images. .

  When the L / R opening / closing signal light emitting unit 4 receives a signal related to the opening / closing of the shutter glasses 13 from the display control unit 2, the L / R opening / closing signal light emitting unit 4 outputs an opening / closing signal for instructing the shutter glasses 13 to open / close the shutter with infrared rays (code holding unit 5 It has a function as a signal transmission means for transmitting a code held in the. In the present embodiment, it is exemplified that the open / close signal is transmitted by infrared rays. However, the present invention is not limited to this, and other wireless transmission methods may be used as long as the open / close signal can be transmitted. Further, the video display device 12 and the shutter glasses 13 may be connected by a wired cable capable of transmitting and receiving signals.

  As shown in FIG. 1, the shutter glasses 13 have the following configuration. The light receiving unit 6 receives an infrared light emission signal from the TV side and converts it into an electrical signal. The decoding unit 7 compares the code data of the code holding unit 8 with the electrical signal from the light receiving unit 6 and generates a coincidence signal. The shutter control unit 9 controls the opening / closing of the left / right shutter of the glasses based on the timing of the coincidence signal from the decoding unit 7.

The shutter glasses 13 open and close the shutter based on the open / close signal received from the L / R open / close signal light emitting unit 4.
The switching of the display displayed on the display unit 3 and the shutter opening / closing cycle of the left and right lenses of the shutter glasses 13 will be described below.
As a conventional example of a stereoscopic television system using shutter glasses, there is a portion that overlaps with the above description, but there is a method in which infrared light or the like is transmitted from the TV side and the shutter opening / closing timing of the glasses is controlled. FIG. 4 is a diagram schematically showing opening and closing of the shutter of the shutter glasses. For example, in the case of a TV that displays at 120 fps, the image for the left eye and the image for the right eye are displayed alternately every approximately 8.3 mS, and the sync pulse is infrared at the start of the image display for the left eye every Tfrm (16.6 mS = 8.3 + 8.3). Use to send to shutter glasses. The shutter glasses generate a Lopen / Ropen signal from this synchronization pulse. When the Lopen signal is “1”, the right-eye shutter is opened and closed with “0”. When the Ropen signal is “1”, the left-eye shutter is opened and closed with “0”. In this way, stereoscopic display is realized by matching the right / left eye image display on the tv side and the shutter opening / closing timing of the shutter glasses.

  As a problem of this conventional method, when a plurality of TVs are adjacent to each other as shown in FIG. 5, the above method cannot distinguish the synchronization pulse of each TV and cannot normally perform stereoscopic viewing. Also, each TV-shutter glasses pair can distinguish the sync pulse of each TV by sending a unique code instead of a pulse. However, even when a code is sent as shown in FIG. If they match, the signals overlap (collision) and the code cannot be received normally, so normal stereoscopic viewing cannot be performed.

  The present embodiment solves the above problem and enables normal stereoscopic viewing even when a plurality of stereoscopic TVs are adjacent to each other. The TV side and the glasses share a unique code, and the TV side transmits the code to the glasses as an infrared signal when the left-eye image display starts. At this time, it is not sent every Tfrm every time, but after pseudorandom numbers Xi (natural number) * Tfrm. The glasses side opens the left shutter at the timing of receiving the code, and opens / closes the left / right shutter at the predetermined timing. Thereby, it is possible to prevent the infrared signals from colliding and to realize normal stereoscopic vision.

  As a pseudo-random number generation method, for example, there is a uniform random number congruence method (multiplication formula or the like). Further, as a method of sending a code by the infrared signal, there is a remote control-like method described below.

Here, the light emission timing will be described. The next light emission timing Ti + 1 emitted at a certain time Ti is calculated by the following equation.
Ti + 1 = Ti + Tfrm * X (m) i + 1 (1)
As described above, Tfrm is a time for displaying a pair of left / right eye images, and is 16.6 mS (left eye display time (8.3 mS) + right eye display period (8.3 mS)) at 120 fps. X (m) i + 1 is a pseudorandom number obtained by the above congruence method (multiplication formula).

X (m) i + 1 = λ (m) * X (m) i (mod P (m)) (2)
The above equation is a formula for calculating the pseudorandom number X (m) i + 1. The subscript m is a TV-glasses pair number, which corresponds to # 1, # 2, and # 3 in FIG. That is, a different series of pseudo-random numbers is used for each TV-glasses pair.

  FIG. 3 schematically shows the light emission timing. In FIG. 3, the timings of TV # 1 and TV # 2 coincide at time Ti and a collision occurs. However, since the next emission timing is determined by the pseudorandom numbers of the respective sequences, the timing of the subsequent emission does not match. Collisions are avoided.

FIG. 2 is a flowchart of processing of the shutter control unit 9.
ST1: The counter i, the left shutter release signal Lopen, and the right shutter release signal Ropen are initialized to 0. As described above, when the Lopen signal is “1”, the right-eye shutter is opened and closed with “0”. When the Ropen signal is “1”, the left-eye shutter is opened and closed with “0”.

ST2: As a result of comparison in the decoding unit, if the code matches the code, the process proceeds to (ST3), otherwise the process proceeds to (ST4).
ST3: The counter i is initialized with 0, and Lopen = 1 and Ropen = 0 are substituted. (At this point, the left shutter is open and the right shutter is closed)
ST4: The counter i is incremented by 1 (the increment unit may be associated with time or the like).
ST5: The counter i is compared with Tfrm / 2 and if it matches or exceeds (ST6), the process proceeds to (ST7), otherwise.
ST6: Substitute Lopen = 0, Ropen = 1 (At this point, the left shutter is closed and the right shutter is open)
ST7: The counter i is compared with Tfrm, and if it matches or exceeds (ST8), the process returns to (ST2) otherwise.
ST8: The counter i is initialized with 0, Lopen = 1 and Ropen = 0 are substituted (the left shutter is opened and the right shutter is closed at this point), and the process returns to (ST2).

  There is a signal waveform format which is a binary pulse waveform in an infrared remote controller or the like. For example, time transition of voltage level is used. Following the leader code (H section is 4.5 msec, L section is 4.5 msec), there are custom codes, data codes, and the like.

  FIG. 7 is a flowchart of control by the microcomputer (not shown) of the shutter glasses 13. In the self-running state, the microcomputer enters the wait mode waiting for the code arrival by the timer from the sleep mode. When it is determined that the signal received from the video display device 12 is an appropriate signal as described later, shutter control is performed.

  In the shutter glasses 13, the microcomputer enters the wait mode waiting for the code arrival by the timer (step S 701), receives the infrared signal from the L / R opening / closing signal light emitting unit 4 by the light receiving unit 6 (step S 702), and the microcomputer reads the reader. By detecting the rising edge of the code (Yes in step S703), the normal mode for measuring the leader code is entered (step S704). The H section and L section of the reader code of the received light signal are measured (step S705), and if the reader code is appropriate (H section is 4.5 msec and L section is 4.5 msec) (Yes in step S706), the microcomputer sends a remote control signal. Judged as received. Subsequent to this determination, the custom code and the data code are decoded (step S707). If the code cannot be decoded (No in step S706), the microcomputer is again set to the sleep mode and the process is terminated. In addition, also when it determines with No by said step S703, a microcomputer is again set to sleep mode and it complete | finishes.

  In step S706, the time from when the leading edge of the leader code is detected until the clock operates stably is usually about 1 msec. Therefore, when measuring the H section of the leader code, this 1 msec is measured in advance. I do.

  Next, when it is determined that the data is an appropriate code as a result of decoding in step S707 (Yes in step S708), the microcomputer performs shutter control and switches the shutter, but when it is not a remote control code (No in step S708), the microcomputer is again used. Set to the sleep mode and exit.

  As described above, according to the present embodiment, the pair of stereoscopic TV and the shutter glasses share the infrared transmission code, and the transmission timing of the pair of TV-shutter glasses using a pseudo-random number. By making them different, collision of infrared signals can be prevented, and normal stereoscopic vision can be achieved without interfering with each other even when a plurality of stereoscopic televisions are adjacent to each other.

In this embodiment, an infrared signal is used, but it is clear that generality is not lost even if it is replaced with a radio signal such as a radio wave or an ultrasonic wave.
As described above, in this embodiment, when transmitting the opening / closing timing by infrared from the TV to the shutter glasses, a code corresponding to each shutter glasses is transmitted at a random timing using a pseudo-random number, and the shutter glasses are The opening / closing timing is corrected only when a code is received.

(1) In a stereoscopic TV system that controls the opening / closing timing of shutter glasses by infrared light from the TV side, the TV side uses random numbers for the codes corresponding to each shutter glasses together with the opening / closing timing by infrared light. Send with. The pair of shutter glasses opens / closes the right / left shutters at predetermined intervals, and corrects the opening / closing timing only when the code of the infrared light signal from the TV side corresponds to itself.

(2) A sequence of pseudo-random numbers used for a plurality of TV side-shutter glasses is different.
In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, it can implement in various modifications.
Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 1 ... Tuner, 2 ... Display control part, 3 ... Display part, 4 ... L / R opening / closing signal light emission part, 5 ... Code holding part, 6 ... Light receiving part, 7 ... Decoding part, 8 ... Code holding part, 9 ... Control , 10 ... microprocessor, 11 ... stereoscopic image display system, 12 ... video display device, 13 ... shutter glasses, 14 ... lens for left eye, 15 ... lens for right eye, 16 ... signal processing unit, 17 ... graphic processing unit, 18 DESCRIPTION OF SYMBOLS ... OSD signal generation part, 19 ... Video processing part, 20 ... Display, 23 ... Operation panel, 24 ... Infrared transmission part, 25 ... Infrared light reception part, 26 ... Flash memory, 27 ... USB connector, 28 ... Card connector, 29 ... Network communication circuit.

Claims (5)

Input means for inputting a first image group and a second image group which is an image group having parallax with the first image group;
A signal transmission means for transmitting a signal to shutter glasses having a shutter capable of blocking images incident on the right eye and the left eye when worn by the user;
Code holding means for holding a unique code for opening and closing the shutter glasses to be transmitted as the signal;
Display means for displaying an image,
The video display apparatus set so that the code is transmitted at a non-periodic timing.   The video display device according to claim 1, wherein the non-periodic timing is set by thinning out the opening / closing synchronization timing of the shutter glasses.   2. The video display device according to claim 1, wherein the non-periodic timing is set by thinning out the opening / closing synchronization timing of the shutter glasses so as to be partially exclusive of shutter glasses of other video display devices using a pseudo random number. . Input means for inputting a first image group and a second image group which is an image group having parallax with the first image group;
A signal transmission means for transmitting a signal to shutter glasses having a shutter capable of blocking images incident on the right eye and the left eye when worn by the user;
With this shutter glasses,
Code holding means for holding a unique code for opening and closing the shutter glasses to be transmitted as the signal;
Display means for displaying an image,
An image display system for controlling the code to be transmitted at irregular intervals. Input a first image group and a second image group that is an image group having parallax with the first image group, and display these images;
Video display method for transmitting a specific code for opening / closing the shutter glasses to the shutter glasses having shutters capable of blocking images incident on the right eye and the left eye when the user wears them at an irregular timing .

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