JPS62276989A - Stereoscopic reproducing device - Google Patents

Abstract

PURPOSE:To prevent malfunction in, shutter switching operation by digitizing a left/right picture display timing signal and sending a shutter switching signal while synchronizing the code sending timing with a specific bit. CONSTITUTION:A picture signal obtained from a video disk player A is inputted to a synchronizing separation circuit 1 and a vertical synchronizing signal is separated from the picture signal. A field identification circuit 2 identifies (2) the left/right field corresponding to the left/right picture from the vertical synchronizing signal to output the left/right field timing signal, which is digitized by a code generating circuit 3 and the left/right field code signal is outputted synchronously with the specific bit of the code. The field code signal is demodulated and discriminated by a code discrimination circuit 8 and the left/ right display timing signal displaying the left/right picture is obtained by a shutter drive timing circuit 9 to apply switching drive 10 to liquid crystal shutters 11, 12 of spectacles.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a three-dimensional image reproduction device, and in particular, a three-dimensional image reproduction device in which a three-dimensional image is viewed through wirelessly controlled glasses. The present invention relates to a video playback device.

[Prior art and its problems]

Generally, in this type of 3D video playback device, the timing of opening and closing of the left and right shutters provided on the glasses is synchronized with the switching of the field where the image is created, and therefore the glasses and the image display device are A signal cable was connected between them to transmit a switching synchronization signal for switching the left and right shutters of the glasses, or this switching synchronization signal was transmitted wirelessly using infrared rays or the like.

However, the method of transmitting the switching synchronization signal using the signal cable is inconvenient to handle because it requires connecting the glasses and the image display device with a cable, and furthermore, the viewing position is limited by the length of the cable. There was a problem. In addition, in the wireless transmission method, the switching synchronization signal for switching the shutter is transmitted as is.
There has been a problem in that malfunctions are likely to occur due to external noise, such as wireless remote control signals from television receivers, lighting equipment using fluorescent lamps, and the like.

[Purpose of the invention]

The present invention solves the above-mentioned technical problems by digitally encoding a signal indicating the left and right image display timing, synchronizing the timing of transmitting this code with a specific bit of this code, and transmitting a signal to switch the shutter of the glasses. It is an object of the present invention to provide a stereoscopic video reproduction device that can prevent malfunctions in shutter switching operations.

[Means to achieve the purpose]

The present invention provides eyeglasses equipped with shutters that switch left and right image signals from an image reproducing device in a time-division manner to display left and right images on an image display device, and display images projected on the image display device with shutters that are opened and closed alternately on the left and right sides. In a stereoscopic video playback device in which viewing is performed through a stereoscopic video, first, an identification circuit identifies a left field and a right field corresponding to left and right images, respectively, from a vertical synchronization signal included in the image signal, and determines the timing of the left field. A left field timing signal indicating the timing of the right field and a right field timing signal indicating the timing of the right field are output. The left field timing signal and the right field timing signal are input to a code generation circuit, where they are each digitally coded, and outputted as a left field code signal and a right field code signal in synchronization with specific bits of the code.

The left field code signal and right field code signal are transmitted from the transmitting means to the code discrimination circuit. The code discrimination circuit demodulates and discriminates the left field code signal and the right field code signal from the transmitting means, and sets specific bits of the left field code signal and the right field code signal to the left side display timing, which is the timing for displaying the left and right images. Input the signal and the right side display timing signal to the shunter drive means,
Here, the shack of the glasses is driven to open and close in response to the left display timing signal and the right display timing signal.

This makes it possible to construct a stereoscopic image reproducing apparatus that does not malfunction even when noise occurs.

〔Example〕

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a timing chart of the circuit shown in FIG. The configuration of the present invention will be explained below along with its operation.

In FIG. 1, a video disc player 8, which serves as an image reproducing device, is set with a video disc on which right-eye image signals and left-eye image signals are recorded alternately in a time-division manner. By tracing the disk with a pink amplifier head, an image signal in which the left and right images alternate every field is obtained, and this image Shingetsu is
The video is input to a monitor television B as an image display device and displayed.

The image signals obtained from the video disk players 7 to 7 are input to the synchronization separation circuit 1, and the synchronization separation circuit 1 converts the image signals into vertical synchronization signals S as shown in FIG. 2(a).
, and input it to the field identification circuit. The field identification circuit 2 generates an odd field detection pulse P0 as shown in FIG. 2(b) based on the vertical synchronization signal SH.
The even field detection pulse P4 as shown in FIG. 2 (C1) is outputted and inputted to the code generation circuit 3. Even field code signal d2 as shown in dl and even field detection pulse P
An odd field code signal d as shown in FIG. 2 (dl) generated in synchronization with the rising edge of E is output. It consists of an 8-bit pulse train.The odd field code signal and the even field code signal d2 are modulated by an oscillation signal from an oscillator (not shown) and sent to the LED drive circuit 4.
The LED drive circuit 4 amplifies this input signal to a predetermined level and causes the infrared light emitting diode 5 to emit light.

The light from the infrared light emitting diode 5 is given as an electric signal to the selection amplifier circuit 7 via the light receiving diode 6, and the electric signal is amplified and rectified and sent to the code discrimination circuit 8 as a pulse data signal without a carrier wave. Given. The code discrimination circuit 8 decodes the pulse data signal and first detects a specific code string indicating an odd field, that is, the odd field code signal d. The first bit after detecting the odd field code signal d indicates the rising edge timing of the odd field. Therefore, after detecting the odd field code signal d1, the code discriminator circuit 8 detects the odd field code signal d1 and then outputs the odd field code signal d1. A right side display timing signal TR is output. The shutter drive timing generation circuit 9 to which the right display timing signal T is inputted outputs a gate pulse GR for the right eye liquid crystal shutter as shown in FIG. 2(g) based on the rising timing of the signal T. . The liquid crystal shutter drive circuit 10 boosts the gate pulse GM for the right eye liquid crystal shutter and drives the right eye liquid crystal shutter 11 open for one field period.

Next, the code discrimination circuit 8 detects a specific code string indicating an even field, that is, an even field coat signal d2, and then detects the rise of the first bit of the flame, as shown in FIG.
A left side display timing signal TL as shown in fl is output. The shutter drive timing generation circuit 9, which receives this left display timing signal TL, outputs a gate pulse GL for the left eye liquid crystal shutter as shown in FIG. 2 (hl) based on the rising timing of the signal TL.Liquid crystal shutter drive The circuit 10 boosts the gate pulse GL for the left eye liquid crystal shutter and drives the left eye liquid crystal shutter 12 open for one field period.

With this configuration and operation, the right eye liquid crystal shutter 11 and the left eye liquid crystal shutter 12 of the glasses are opened and closed, and the image displayed on the monitor TV B is viewed as an image with a stereoscopic window. Become.

〔Effect of the invention〕

As described above, according to the present invention, the left field timing signal and the right field timing signal are digitally coded, the left field code signal and the right field code signal are transmitted in synchronization with specific bits of this code, and the shank of the glasses is transmitted. - Since the shutter is driven to open and close, it is possible to prevent malfunctions in opening and closing the shutter due to external noise, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a timing chart for explaining the operation of this embodiment. In the figure, A...video disc player (image playback device), B
... Monitor TV (image display device), 2... Field identification circuit, 3... Code generation circuit, 4... LED drive circuit (transmission means), 5... Infrared light emitting diode (transmission means) ), 8... Code discrimination circuit, 9... Shutter drive timing generation circuit (shutter drive means), 10... Bone night crystal shutter drive circuit (shutter drive means) 11... Liquid crystal shutter ivy for right eye -1 12...Liquid crystal shutter for left eye.

Claims (1)

[Claims] (1) The left and right image signals from the image reproducing device are switched in a time-sharing manner to display the left and right images on an image display device, and the images projected on the image display device are displayed on glasses equipped with shutters that open and close alternately on the left and right sides. In a stereoscopic video playback device that allows viewing through a stereoscopic video signal, the left field and right field corresponding to the left and right images are identified from the vertical synchronization signal included in the previous image signal, and the left field timing signal and left field timing signal indicating the timing of the left field are identified. an identification circuit that outputs a right field timing signal indicating the timing of the right field; a left field timing signal and a right field timing signal from this identification circuit are each digitally coded; and the field timing is synchronized with a specific bit of this code. a code generating circuit that outputs a left field code signal and a right field code signal, a transmitting means for transmitting a left field code signal and a right field code signal from this code generating circuit, and a left field code from this transmitting means. A code discrimination method that demodulates and discriminates the signal and the right field code signal, and outputs a left display timing signal and a right display timing signal using specific bits of the left field code signal and the right field code signal as timings for displaying left and right images. A stereoscopic video reproducing apparatus comprising: a circuit; and shutter driving means for driving the shutters of the glasses to open and close in response to a left side display timing signal and a right side display timing signal from the code discrimination circuit.