JPS62285594A - Drive system for shutter device - Google Patents

Abstract

PURPOSE:To observe any one of a floated image, a retracted image, a plane image, a left image or a right image in response to the request of a viewer by controlling the light transmitting/shutting mode of plural shutter means depending on the mode of a control signal. CONSTITUTION:A signal superimposing device 4 superimposes a shutter control signal generated corresponding to the operating state of a superimposing switch 13 on left.right video signal strings (alternative signals) inputted alternately. On the other hand, a mode changeover switch 18 is connected to the superimposing switch 13, and when a switch SW1 is turned on, a left shutter 12a of a stereoscopic vision shutter 12 and when a switch SW2 is turned on, a right shutter 12b is opened by using shutter control signals SL, SR, which are generated by a superimposing signal generator 17. Thus, light incident on the shutter is transmitted or interrupted in correspondence to the mode of a control signal controlling plural shutter means.

Description

DETAILED DESCRIPTION OF THE INVENTION 3. Detailed Description of the Invention Field of Industrial Application The present invention relates to a driving method for a shutter device suitably used in a stylistic video VC system using binocular parallax.

BACKGROUND OF THE INVENTION Conventionally, a method called an alternative method has been proposed to realize a three-dimensional image device. The OrgNative method will be explained below.

First, the left imaging device and the right imaging device photograph a subject and output a left video signal and a right video signal, respectively. The output left video signal and right video signal are
The switching control circuit sequentially switches the signals at fixed time intervals and sends them out alternately.

For example, a vertical synchronization signal is used at the predetermined time interval M, and the processing is performed in synchronization with these synchronization signals.

In addition, the superimposed signal generator generates a superimposed signal, such as ultrasonic waves, to identify the left and right sides of the video signal when the left video signal or right video signal is switched in synchronization with the switching of the left and right video signals. , the left and right video signals are superimposed and output by a signal superimposition device.

Next, left and right video signals, left and right identification signals, audio signals, etc. are separated. By transmitting the separated superimposed signal to a shutter device installed between the viewer's frame and a video display device realized by, for example, a cathode ray tube, the shutter of the shutter device can separate the left video signal and the right video signal. It opens and closes in synchronization with switching between the two video signals. Therefore, the left and right sides of the screen of the video display device? The switching and the switching between the left and right shutter devices based on the left and right identification signals are always performed in correct synchronization.

Problems to be Solved by the Invention As mentioned above, in the conventional alternative system, the left eye always sees the left image, and the right eye always sees the right image, so it is possible to obtain stereoscopic vision. The correspondence between the switching of the left and right images on the screen and the shutter is always a simple repetition of alternating operations, and for example, it is not possible to open the right shutter and the left shutter at the same time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a driving method for a shutter device in which switching between left and right shutters of the shutter device can be controlled independently of switching between left and right images on a screen.

Means for Solving the Problems The present invention provides a shutter device having a plurality of shutter means driven to pass/block light, a control signal for controlling the shank means, and a carrier wave for carrying the control signal. A signal separation circuit that separates the signal, and a shutter drive circuit that converts the control signal into a drive signal that drives the shutter means, and according to the mode of the control signal, passes/blocks light from each of the plurality of shutter means. This is a driving method of a shutter device characterized in that the aspect is controlled.

According to the present invention, a control signal for controlling a plurality of shutter means and a carrier wave for carrying the control signal are separated by a signal separation circuit. This separated control signal is input to a shutter drive circuit, converted into a drive signal that can actually drive the shutter means, and outputted to the shank device. The shutter device is driven to pass or block light depending on the form of the input drive signal. In this way, the shutter device can be controlled in a desired manner in accordance with the aspect of any control signal carried on the carrier wave.

Embodiment FIG. 1 is a 0.2 diagram showing the configuration of an embodiment of the present invention. The present example will be explained below with reference to FIG.

The right imaging device 2 and the left imaging device 3 photograph the subject 1 and output a left video signal and a right video signal in the same M range. These output signals are sent to the signal superimposition device 4
is input. The signal superimposition device 4 sequentially switches the right video signal and the right video signal in a vertical synchronization period, that is, every field, and outputs the following: ■ Left video signal → ■ Right video signal → ■
The left video signal, etc. are input alternately. In this case, although the vertical synchronization period is used in this embodiment as the cycle for changing, a horizontal synchronization period or a period that is an integral multiple of these periods may be used. Further, the signal superimposing device 4 superimposes a shank control signal generated in accordance with the operating state of the superimposing switch 13 on left and right video signal sequences (hereinafter referred to as alternative signals) that are alternately input.

The superimposed signal is recorded as a superimposed video signal which is a standard video signal 7↑-matte into a video recording device (hereinafter abbreviated as VTR) 5 realized by, for example, a video tape recorder. The superimposed video playback signal played back by the VTR 5 is input to the signal demodulator 6, where it is separated into an alternative signal and a left shutter control signal and a right shutter control signal, which are signals for shutter switching.

Signal trace preparation! ! The org-native signals output from 6 are displayed as left and right video information alternately at a vertical synchronization period on a video display device (hereinafter abbreviated as CRT) 7 realized by, for example, a cathode ray tube. Further, the left shutter control signal SL and right shutter control signal SR outputted from the signal demodulator 6 are transmitted to the left shutter control signal SL and the right shutter control signal SR of the stereoscopic camera/shower device 12, which has left and right shutter means driven to pass/block light. Shutter 12a and right shutter 1
2b are controlled to open and close, respectively. Note that it is convenient to make the stereoscopic viewing shutter device 12 a @mirror or the like and realize the shutter means by a liquid crystal because it can be made smaller and lighter.

FIG. 2 is a diagram showing an example of left and right images displayed on the CRT 7 and monthly aspects of the stereoscopic shutter device 12. Two points! CRT as shown in iA? When the left image 7a is projected above, the left shutter 12a of the stereoscopic shutter device 12 is opened by the left shutter control signal SL output from the signal demodulator 6, and the right shutter 1 is opened.
2b is shown in a closed state. That is, the viewer will see the left image 7a at the left limit. Similarly,
When the right image 7b is displayed on the CRT V as shown by the two-dot chain line B, the left shutter 12a closes, the right shutter 12b opens, and the viewer sees the right image 7b with his right eye. .

FIG. 3 is a block diagram showing the configuration of the signal superimposing device 4. As shown in FIG.

The signal superimposition device 4 includes a switch SW3 that switches video signals input from the right imaging device 2 and the left imaging device 3, and a switching control circuit 14 that controls the switch SW 3.
A mode switching switch 18 that specifies the switching mode of the superimposition switch 13, and switches SWI, S of the superposition switch 13.
A superimposition signal generator 17 generates a shutter control signal for controlling the opening/closing operation of the left and right shutters of the stereoscopic crucible shutter device r1112 in response to the 0N10FF state of W2, and superimposes the video signal and the shutter control signal. Superimposed device 15
and an amplifier 16 that amplifies the superimposed signal.

The right video signal and left video signal from the right imaging device 2 and the left imaging device 3 are synchronized and input to terminals e and f of the switch SW 3, respectively.

The switch SW3 is switched by the switching control circuit 14 at the vertical synchronization period of the left and right video signals input synchronously. Note that the switching control circuit 14 is connected to the vertical synchronization signal of the input left and right video signals. Therefore, at the terminal g of the switch SW3, the left and right video signals inputted to the terminals e and f appear alternately for each field in time series.

On the other hand, the superimposition switch 13 includes a mode changeover switch 18.
is connected, and the superimposition switch 13's matainochi SW1
and controls switch SW2.

That is, the mode changeover switch 18 has, for example, an alternative mode position jii 18a, a fully open mode position 18b1, a left open mode position 18c, and a cloth gap mode position f.
There are four mode switching positions: il 8d, and parallel mode position 1: alternate mode position 18a.
8a-1 and cross mode positions 18a-fI. The details will be described later.

The alternative mode position 18a alternately switches the switch SWI and the switch SW2 of the superimposition switch 13, the full open mode 18b turns on both the switch SW1 and the switch SW2, and the left open mode 18c turns on only the switch SW1. ON, and in cloth mode 18d, only switch SW2 is turned ON. That is, switch SW
1 is ON, the left shutter 12a of the stereoscopic shutter device rIt12 is opened, and when the switch SW2 is ON, the right shutter 12b is opened.
L and SR are generated by the superimposed signal generator 17. Note that the superimposed signal generator 17 is synchronized with the vertical synchronization period of the input left and right video signals.

At the terminal gl near of the switch SW3, the left and right video signal sequences, that is, the alternative signals that appear mutually, and the left shutter control signal SL and right shutter control signal SR generated by the superimposed signal generator 17 are superimposed by the superimposed device 15,
The signal is sent to amplifier 16.

The superimposed signal is amplified by the amplifier 16, outputted as a superimposed video signal, and recorded on the VTR 5.

The second figure is a diagram schematically representing the alternative signal appearing at the terminal g of the switch SW3, and in the figure,
H represents the horizontal scanning period, and V 1 , V 2 , V 2 , . . . represent the vertical scanning period. FIG. 5 is a waveform diagram of the superimposed video signal and the signals contained therein. Below, the fourth
The superimposed signal will be explained with reference to the figure and FIG. Here, Table 1 below shows the switching of the switches SWI and SW2 of the superimposition switch 13 and the corresponding shutter operation.

(Left below) Table 1 and Figure 5 (1) show the vertical synchronization signal. Vertical scanning period V
l, 'V 2. V3. ”'+!, Vertical fL scan 4rf
Between rmM W l l W 21W 31...and 1
It consists of field opening F++F2+FIl+... Switching of the switches SWI and SW2 is performed during the vertical scanning retrace dose 'vV 1- W 2 , W 3- . This vertical synchronization signal is input to the switching control circuit 14 and the superimposed signal generator 17, and the switching control circuit 14 and the superimposed signal generator 17
Chi SWI, SW2. Switching of SW3 is synchronized with the vertical synchronization signal.

(2) in the same figure shows the OrgNative signal. That is, the left video signal and the right video signal are alternately output for each field.

FIG. 3(3) shows the waveforms of the shutter control signals SL and SR generated by the superimposed signal generator 17.

When the switch SWI of the superimposition switch 13 is ON, the shutter control signals SL and SR are generated as pulses SL with a constant width and level t seconds after the rise of the vertical synchronization signal, and when the switch SW2 is ON, the vertical synchronization signal SL is generated. After the beginning of the signal tn 8', a pulse SR with a constant width and level
is generated. That is, pulse SL is the left shutter control signal and pulse SR is the right shutter control signal.

As described above, the signals (1) to (3) in the figure are synchronously superimposed by the superimposed device 15, resulting in a superimposed video signal as shown in (4) in the figure. The pulses SL and SR are generated during the period from the rise of the I-direction M signal to the rise of the video signal after 10H (here, IH is one horizontal scanning period).

FIG. 6 is a block diagram showing the configuration of the signal demodulating device 6. As shown in FIG.

The signal demodulator 6 includes a superimposed signal separation circuit 19 that separates a superimposed video signal, a left shutter control signal SL and a right shutter control signal SL.
A left shutter drive circuit 20 that converts the control signal SR into a shutter drive signal. Right shutter drive circuit 21 Alternative amplifier circuit 2 that amplifies the upstream alternative signal
It is composed of 2.

FIG. 7 is a waveform diagram of a superimposed video signal and a separated signal. The operation of the signal demodulator 6 will be described below with reference to FIGS. 6 and 7.

(1) in the same figure shows the waveform of the superimposed video signal recorded on the VTR 5. This superimposed video signal is input to the superimposed signal separation circuit 19 of the signal demodulator 6.

(2) in the same figure shows the waveform of the alternative signal separated by the superimposed signal separation circuit 19, and (3) in the same figure shows the waveforms of the separated left shutter control signal and right shutter control signal. The left shutter control signal SL and the right shutter control signal SR are sent to the left shutter drive circuit 20 and the right shutter drive circuit 21 to generate a left shutter drive signal and a right shutter drive signal necessary for opening and closing the shutter. The signals are converted into III signals and drive the left shutter 12a and right shutter 12++ of the stereoscopic shutter device 12, respectively.

Figure (4) is the converted left shutter drive gJG.
(5) in the figure is the right shutter drive signal. That is,
In field 1, both the left shutter 12a f; and the right shutter 12b are open, in field 2, only the right shutter 12b is open, and in field 3, only the left shutter 12a is open. In addition, in the shutter drive signal, the timing of switching from the level that drives the shutter to open to the level that drives the shutter to close is synchronized with the falling edge of the synchronization signal for each field, and the opposite switching timing is synchronized with the fall of the synchronization signal for each field. It is synchronized with the rise.

On the other hand, the alternative signal is amplified by the alternative amplifier 22, and the CRT? sent to.

As a result, the CRT 7 alternately displays the left image 7a and the right image 7b.

In field 1, both the left and right shutters are open, and the viewer sees the left image 7a captured by the left imaging device 2. In field 2, left shutter 1
2m is closed and the right shutter 12b is open, the viewer will see the right image 7b photographed by the right image device 3 at the right limit.

Field 3 is the opposite of field 2.

FIG. 8 shows a stereoscopic viewing system corresponding to the parallel mode 18a-T and the crossed mode 18a-■ in the alternative mode 18a.

Figure (1) shows a stereoscopic viewing system called parallel type, which is realized when the mode changeover switch 18 is switched to the parallel mode 18a-r of the alternative mode 18a. be. That is, by repeating the above-described cases of field 2 and field 3 alternately, the left eye always sees the left image 7a, and the right eye always sees the right image 7b. This allows the viewer to view, for example, an image displayed on the CRT 7.

(2) in the figure shows a stereoscopic viewing system called a cross type, and the mode changeover switch 18 is set to cross mode 1.
This is realized when switching to 8a-If. That is, it is sufficient to shift the switching operation of the superimposition switch in the parallel mode 18a-1 by one field. Then, the pulse SL, which is the left shutter control signal, will be superimposed on the right video signal, and the pulse SR, which is the right shutter control signal, will be superimposed on the left video signal, and the left eye will always see the right video 7b. , the left image 7a can always be seen at the right limit. In this case, unlike the case of the parallel type, the left and right images are oppositely viewed, allowing the viewer to view, for example, an image drawn on a CRTV.

Next, set the mode selector switch 18 to fully open mode 18.
When switching to b, both the left shutter control signal and the right shutter control signal will be superimposed in the entire field of the alternative (i), and the shutter device 12 for standing tree celebration will have both left and right shutter control signals. For example, if the subject 1 photographed by the right imaging device 2 and the left imaging device 3 is flat, there is no need to take the trouble to view it in the alternative mode 18a, and it is better to view it in the full-open mode 181. The light enters both eyes (TS- is doubled) and becomes brighter overall.For example, from the alternate tap mode 18a to this full open mode 18b1.

When switched, the 3D image becomes a 2D image, and the telepino 1
The effectiveness of the receiver is improved.

In addition, when the mode q changeover switch 18 is switched to the left open mode 18c, the pulse, which is the left shutter control signal, is applied only to the field where the left video signal of the ORG native signal, which is the left and right video signal sequences arranged alternately, is set. Even if the SL is superimposed (1 degree), the left side cover 12a of the stereoscopic viewing shutter 12 is always open and the right shutter 12b is closed (2). The process ends by viewing the photographed left image 7a.

Similarly, when switching to the left open mode 18d, the viewer always sees the right imaging device r! Right image 7 taken by 12
You will see b.

As described above, by changing the mode changeover switch 18, a raised image, a retracted image, a flat image,
Either the left image or the right image with a deviation of ν1 can be viewed according to the viewer's request.

Effects As described above, according to the present invention, it is possible to control the light entering the shutter device so that it passes through or is blocked in accordance with one aspect of the control signal that controls the plurality of shutter means. Furthermore, by setting the control and signals in any desired manner, it is possible to realize a desired operation manner of the plurality of shutter means. In this way, the convenience of the shutter device according to the invention is reliably improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a diagram showing left and right images displayed on a CRT 7 and an example of the open/closed state of the stereoscopic shutter device 12, and FIG.
The figure shows vIr! of the signal superimposing device 4. r. 4 is a block diagram showing the alternative signal appearing at the terminal g of the switch SW3 in a wedge-like manner.
6 is a block diagram showing the configuration of the signal demodulator 6. FIG. 7 is a waveform diagram of the superimposed video signal and signals included therein, and a shank drive signal. The waveform diagram and tlS8 diagram are schematic diagrams for explaining the parallel type and the crossed type. DESCRIPTION OF SYMBOLS 1... Subject, 2... Right imaging device, 3... Left imaging device, 4... Signal superimposition device, 5... VTR16
... Signal demodulator, 7... CRT, 12... Stereoscopic shutter device, 13... Superimposition switch, 14...
・Switching control circuit, ]5... Superimposed device, 16... Multiplier, 17... Superimposed signal generator, 18... Mode selection switch, 18a... Alternative mode, 18
a-(...Parallel mode, 18a-■...Cross mode, 18b...Full open mode, 18c...Left open mode,
18d...Right open mode agent Patent attorney Saikyo Keibu 1st rj! J Figure 2 Figure 5 Figure 6 Figure 8 Figure 7

Claims (1)

[Claims] A shutter device having a plurality of shutter means driven to pass/block light; and a signal separation circuit that separates a control signal for controlling the shutter means from a carrier wave for carrying the control signal. , a shutter drive circuit for converting the control signal into a drive signal for driving the shutter means, and controlling a light passing/blocking mode of each of the plurality of shutter means in accordance with the mode of the control signal. A drive method for a shutter device characterized by the following.