JPS60153694A - Stereo television set - Google Patents

Abstract

PURPOSE:To carry out stereo television transmission by delaying one binocular parallex video obtained by two set of image pickup devices by a prescribed period and expanding the other with time base then transmit them, interpolating clearance between fields of a demodulating signal by a pseudo signal and switching them by an electronic shutter. CONSTITUTION:A video signal from a lens 2 and an image pickup tube 3 at the right side and that from a lens 12 and an image pickup tube 13 at the left side are transmitted to color encoders 7 and 17. In the encoder 7, a right side video signal delayed by a prescribed period is outputted through a terminal 9. In encoder 17, a left side video signal expanded with time base is outputted through a terminal 26. On the other hand, the receiving side receives a high-frequency signal, demodulates it, converts it into a video signal of 120 fields per second, and interpolates clearance between fields by means of an output of a pseudo signal generator circuit 108. Then electronic shutters 91 and 92 at both sides are alternately switched by synchronizing with the video signal, and a stereo video is reproduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a stereoscopic television device, and in particular, a video signal based on left and right binocular parallax images of a subject is obtained from an imaging device and a stereoscopic image is displayed on a television receiver. It is concerned with the improvement of stereoscopic television equipment such as.

Description of Prior Art When a human views an object with depth with both eyes, a binocular parallax image is generated in which the mutual positional relationship such as the shape of the object visible to the left and right eyes is different. Conventionally, stereoscopic movie devices or stereoscopic television devices have been proposed using such binocular parallax images. As a method of obtaining video signals of both IIN parallax images required for the reproduction of stereoscopic images, WI having an appropriate baseline length is used.
A method has been proposed in which two sets of image devices are used, and a method in which the optical path of an image of a single subject viewed from the left and right sides is alternately switched to obtain images from one set of m image devices.

In particular, a three-dimensional television apparatus has been proposed in which left and right parallax images are alternately switched for each scanning line or for each field and viewed by a single receiver.

However, when a binocular parallax image is projected for each field, the flicker doubles, making it difficult to endure long viewing periods due to fatigue.

OBJECTS OF THE INVENTION Therefore, the main object of the present invention is to achieve compatibility by transmitting binocular parallax video signals in one channel on the imaging side, and to eliminate flicker on the image receiving side, within the limits of current television systems. To provide a stereoscopic television 11li that can be minimized and can withstand viewing for a long time.

Structure of the Invention To summarize the present invention, on the imaging side, two sets of imaging units are provided with appropriate baseline lengths. A video signal based on the binocular parallax images is obtained from the device, and the main carrier wave is modulated with the video signal corresponding to either the left or right binocular parallax image, and the minimum carrier wave of the other required for reproducing the stereoscopic image is The video signal corresponding to the video is output by expanding the time axis, and one video signal and the other IlI are output.
! Either the subcarrier is modulated by the difference signal of the image signal and transmitted as a high frequency signal, or the target binocular parallax image is reflected by a pair of reflecting mirrors each having a sharp electronic shutter. Based on the electric signal output from the imaging means, the video signal corresponding to the binocular parallax image is synchronized with the synchronization signal. Output the video signal corresponding to either the left or right to the pseudo signal generation circuit.
Now, the main carrier wave is modulated with this pseudo video signal, and the video signal output for each field is time-axis expanded and output, and the time-axis expanded I! X! The subcarrier is modulated with the difference signal between the image signal and the pseudo video signal and transmitted as a high frequency signal.

On the image receiving side, the high frequency signal from the FB image side is received and the obtained video signal is transmitted to 120 fields/
300, the gap between each field is interpolated by a pseudo signal generation circuit, and based on the output of one video signal, the left and right video signals are alternately guided to the image receiving means every 1/120 field, Three-dimensional images are reproduced by alternately switching a pair of left and right electronic shutters, which are provided with a plurality of numbers in relation to the image receiving means, in synchronization with binocular parallax video signals.
It was created by R.

The mold will become clearer from the detailed description given below with reference to the drawings.

DESCRIPTION OF EMBODIMENTS FIG. 1 is a schematic block diagram of an imaging device 1 included in an embodiment of the present invention, and FIG. 2 is a diagram of a binocular parallax video signal output from the imaging device 1 shown in FIG. 1. FIG.

At a3° in FIGS. 1 and 2, the image pickup tube 3 receives the right image through the right lens 2, converts it into an electrical signal, and supplies it to the preamplifier 4. Preamplifier 4 amplifies the video signal and outputs it via process amplifier 5, matrix circuit 6, and color encoder 7. Further, in the imaging elf' 1, horizontal and vertical synchronizing signals outputted from the synchronizing signal 10 are given to the process amplifier 5 and the color encoder 7, and are also given to the above-mentioned right image pickup tube 3 via the horizontal/vertical drive circuit 11. A video signal is output. This configuration is the same as a conventional tele.

On the other hand, the left mm wax 13 receives the left image through the left lens 12 and converts it into an electrical signal. The output of this image pickup tube 13 is given to a preamplifier 14 and amplified, and a process amplifier 15. matrix circuit 16 and color encoder] 7. In addition, the horizontal and vertical synchronization signals output from the synchronization signal generation circuit 10 described above are output from the block U.
The water is applied to the sensor module 15 and the color encoder 17, and is also applied to the left image pickup tube 13 through the vertical drive circuit 11. A left-side video signal is output from the error 1-dar 17 (a binocular parallax video signal is obtained together with the above-mentioned right-side video signal).

Furthermore, the left side video signal output from the color encoder 17 is given to a gate circuit 18. Phase discrimination circuit 1
Numeral 9 discriminates between an odd field and an even field based on the horizontal synchronizing signal from the synchronizing signal generating circuit 10, and supplies the discrimination output to the circuit 18. Accordingly, the gate circuit 18 converts the video signal of the even field only when the phase discrimination circuit 19' discriminates, for example, an even field, and supplies its output to the A-O converter 20. The clock generator 21 generates a clock pulse based on the synchronization signal outputted from the synchronization signal generation circuit 10 and supplies it to the Δ-〇 converter 20 . Therefore, A-D
The converter 20 converts the gate circuit 1 based on the clock pulse.
The output of 8 is converted into a digital signal and given to 1 field memory 23. The clock pulses generated by the clock generator 21 are also applied to a write successive control circuit 22, and the m-write read control circuit 22 applies a write signal to the 1-field memory 23 based on the clock pulses.

Therefore, the one-field memory 23 stores the digital signal between one field output from the A-D converter 20 based on the write signal from the write/read control circuit 22.

The 1/2 frequency divider circuit 24 divides the frequency of the synchronizing signal outputted from the synchronizing signal generating circuit 10hl by 172, and provides the output thereof to the write/read control circuit 22 and the DA converter 25. Therefore, the write successive control circuit 22 divides one field memory 2 based on the frequency divided output from the 1/2 frequency divider circuit 24.
3 will be given the reading E1-II III iZ issue. Based on the readout signal, the 1-field memory 23 converts the frequency of the digital signal based on the right video signal stored so far into a 30 field/SeC video signal and outputs it. This output is DA. Analyzer L is applied to the converter 25 based on the divided output from the 1/2 divider
The signal is converted into a 1G signal and output to the output terminal 26.

On the other hand, the right video signal output from the color encoder 7 is outputted to the j terminal 9 via the right-shifting delay circuit 8 with a delay amount approximately equal to the delay amount caused by the writing and successive timing of the left video signal. be done.

Therefore, from the output terminals 9 and 26, as shown in FIG.
A right-side video signal as shown in ) and a left-side video signal obtained by expanding the time axis of the one-field period video signal into two fields as shown in FIG. 2(b) are output.

The right and left video signals are subjected to predetermined waveform processing 1! I! Ornament (
(not shown), the right video signal and the difference signal between the right video signal and the left video signal are output, and the transmitter @ (not shown) modulates the main carrier wave with the right video signal, and modulates the subcarrier with the video difference signal. The carrier wave is modulated and transmitted as a high frequency signal. Therefore, at this point, the current television receiver can receive conventional color images.

It goes without saying that in frequency conversion of a video signal based on time axis extension in the above description, the slower the readout speed, the narrower the subcarrier band. However, in this case, the capacity of the 1-field memory 23 must be increased.

3 to 5 are diagrams for explaining an image pickup device included in another embodiment of the present invention, in particular, FIG. 3 is an illustrative diagram showing the optical system of the image pickup device, and FIG. The figure is a schematic block diagram showing the electrical configuration, and FIG. 5 is a waveform diagram of a video signal output from the m carrier shown in FIG. 4.

Next, other examples of the image pickup device will be described with reference to FIGS. 3 to 5. In FIG. 3, the right electronic shutter 33 is disposed perpendicular to the optical axis CR of the lens 31 and the Il picture tube 32, and the half mirror 34 is disposed at an angle of 45 degrees.

On the other hand, the left electronic shutter 35 is disposed perpendicular to the optical axis C1 parallel to the optical axis CR, and the total reflection mirror 3
6 is arranged so that it has an angle of 45 degrees. The left and right electronic shutters 33', 35 become opaque or transparent by applying or cutting off a voltage to the cross n, and alternately form binocular parallax images on the III picture tube via the lens 31. Obtainable.

Note that the light on the right side enters through the right electronic shutter 33 and half mirror 34, and the light on the left side enters through the left electronic shutter 35 and total reflection mirror 36, so the amount of light on the left and right becomes unbalanced. , the reflectance and transmittance of the half mirror 34 should be selected so that the amounts of incident light are equal, or a neutral density filter should be provided in the left optical system, or the left and right electronic screens should be
A transmittance of I ivy 33.35 is chosen.

In addition, in order to make the changes in the binocular fusion area caused by changes in the size of the playback screen and viewing distance most effective,
A comparison adjustment mechanism 37 is provided.

That is, the spur gear 38 is fixed to the total reflection mirror 36,
A worm gear 39 formed at one end of the adjustment shaft 40 comes into contact with this spur gear 38, and by rotating an adjustment knob 41 provided at the other end of the adjustment shaft 40, the total reflection mirror 39 The angle of can be made variable.

Next, the configuration and operation of the m carrier will be explained with reference to FIG. 4 (15J) and FIG. 5.The output of the image pickup tube 32 shown in FIG. and output via the process amplifier 43° matrix circuit 44 and color encoder 45.
A synchronization signal generation circuit 46 is provided, and horizontal and vertical synchronization signals are outputted from the synchronization signal generation circuit 46 and applied to the process amplifier 43 and the color encoder 45, and are also applied to the image pickup tube 3 via the horizontal and vertical drive circuit 471.
2 is also given. Furthermore, left and right electronic shutters 33.
35', phase discrimination circuits 47 and 7
A lip flop 748 is provided.

The phase discrimination circuit 47 discriminates between odd and even fields. 1, that is, the phase discrimination circuit 47
The first driving pulse as shown in FIG. 3(a') shuts off the left electronic shutter 34 and opens the right electronic shutter 33. Subsequently, the right electronic shutter 33 is disconnected by the first synchronizing pulse of the even field, and the left electronic shutter 3 is
J to release 5: Controls sea urchin 7 lip 70 knob 48. The flip P switch 48 alternately opens and closes the left and right electronic shutters 33 and 35 of C1 based on the discrimination output of the phase discrimination circuit 47.

Therefore, when the right electronic shutter 33 is turned on, the right image is displayed on the right electronic shutter 33. When the left electronic shutter 35 is opened, the image on the left is reflected by the total reflection mirror 36 and the half mirror 34 through the left electronic shutter 35. It is guided to an image pickup tube 32. Then, from the image pickup tube 32, the right side a5 and left side video signals are outputted from the encoder 45 alternately every one no yield as shown in FIG. 5(b).

One word of the binocular parallax image output from the encoder 45 is
The signal is applied to the gate circuit 49. The gate circuit 49 supplies the odd field video signal, that is, the right video signal, to the right pseudo signal generation circuit 50 based on the phase determination circuit 47 determining the odd field. In the right side pseudo signal generation circuit 50, the right side video signal outputted from the gate circuit 49 is applied to a 1-field delay circuit 51, a 2-field delay circuit 53, and an adder 54. The adder 54 adds the right video signal output from the gate circuit 49 and the right video signal delayed by 2 field periods in the 2 field delay circuit 53, and supplies the output to the 1/2 attenuation PJ 56 to output the same. The level is attenuated to 1/2 and output. Since the right video signal output from the 1/2 attenuator 56 is an odd field, the 1/2 H delay circuit 55 I, -J
: v "CI/28 IQ fii" is delayed and converted into an even line.Then, it is output from the delay circuit 52 together with the right video signal delayed by one field period by the one field delay circuit 51.Delay circuit 52 is configured to have a delay amount equivalent to the amount of delay resulting from the write and read timing of the left video signal mentioned above, and the right video signal shown in FIG. 5(C) is output.

On the other hand, the image of the even field output from the gate circuit 49! & signal is given to AD converter 57. The write clock generation circuit 61 generates a write clock pulse based on the synchronization signal from the synchronization signal generation circuit 46, and
- It is applied to the D converter 57 and the write/read control circuit 60. Therefore, the A-D converter 57 converts the even field video signal into a digital signal based on the clock pulse, and supplies the digital signal to the one field memory 58 . Write/read control circuit 6
0 gives a write signal to the 1 field memory 58 based on the m-in lock pulse. Therefore, the 1-field memory 58 stores the even field digital signal given from the A-D converter 57. Further, the 172 frequency divided read clock pulse generation circuit 62 is connected to the synchronization signal generation circuit 46.
Based on the synchronization signal from the write clock pulse generating circuit 61, a read O clock pulse is generated by dividing the clock pulse generated by the write clock pulse generating circuit 61 into half, and is applied to the write/read control circuit 60. The readout control circuit 60 provides a readout control signal to the 1-field memory 58 based on this 1/2 frequency-divided or output pulse. Therefore, from the 1 field memory 58, 30 digital signals based on the even field video signals for 1 field stored up to that point are stored.
It converts into a video signal of field/sec and supplies it to the D-A converter 59. The [)-A converter 59 converts the digital signal into an analog signal based on the read clock pulse frequency-divided by 172, and outputs a left-side video signal as shown in FIG. 5(d).

The right video signal and the left video signal output as described above
The I signal is subjected to waveform processing in the same manner as described in FIGS. 1 and 2 above, and is either transmitted as a high frequency radio wave or directly input to the IIA receiver.

As described above, the image pickup apparatus of the embodiment shown in FIGS. 3 to 5 is provided with a right electronic shutter 33, a half mirror 34, a left electronic shutter 35, and a total reflection mirror 36 in front of the lens 31. = Therefore, it is sufficient to provide only one tube as a 1IilIII tube, and the configuration can be made simpler than the m imager 1 shown in FIG. 1 described above.

FIG. 6 is a schematic block diagram of a television receiver included in one embodiment of the present invention. Next, the configuration of the television receiver will be explained with reference to FIG.
In the television receiver shown in the figure, conventionally known high frequency amplification circuits, intermediate frequency amplification circuits, detection circuits, and the like are omitted, and only the features of the present invention are shown. The high-frequency radio waves obtained by modulating the binocular parallax image video signal obtained from the image pickup device shown in Figure 1 or Figure 4 of (E) above with the main carrier wave and sub-carrier wave are received by the television antenna, and the high-frequency amplification circuit , an intermediate frequency amplification circuit, and a detection circuit, each waveform is processed and inputted to the wai circuit 71, or directly from the m image to the left and right input terminals 7.
It is input to 2a3 and 73. The right video signal, which has been reduced by 1 ml in the m-open circuit 71, is given to an A-D converter 74 and a synchronous #I write clock pulse generation circuit 75.

The I/IIIm clock pulse generation circuit 75 separates a synchronization signal from the demodulated right video signal, generates a clock pulse based on the synchronization signal, and outputs a clock pulse to the A-D converter 74 and the write/read control panel. 77. therefore,
The A/D converter 74 converts the right video signal into a digital signal based on the clock pulse and supplies it to the 1-field memory 76 .

The write successive control circuit 27 provides a write control signal to the 1-field memory 76 based on the write clock pulse. The 1-field memory 76 stores one field of the right-side video signal digitized based on the write control signal.

The digital signal stored in the 1 field memory 76 is outputted from the subsequent clock generation circuit 102, which will be described later.
The signal is read out based on a readout control signal based on the /120 field output pulse and is applied to the DA converter 78. That is, the right video signal is stored in one field memory 7.
The 1/60 field video signal read from 6 is converted into a 1/120 field video signal.

In this way, the converted video signal is given to the right side pseudo signal generation circuit 79.

The right pseudo signal generation circuit 79 includes a 4/120 field delay circuit 80, a 2/120 field delay circuit 81, and a 3/1 field delay circuit.
It is composed of a 20-field W extension circuit 82, an adder 83, a 1/2 attenuator 86, and a 1/2H delay circuit 85. The video signal converted into an analog signal by the D-Δ converter 78 is then transferred to a 4/120 field delay circuit 80 and a 2/20 field delay circuit 80.
The signal is applied to the 120 field delay circuit 81 and the 3/120 field delay circuit 82, and is delayed for a predetermined delay period in each delay circuit. 4/120 field delay circuit 80 and 2/120 field delay circuit 81
The respective delayed outputs are supplied to an adder 83 and added. The output of the adder 83 is given to 1/2 attenuation@86, and the output level of the added video signal is attenuated by 1/2. The output of 1/2 attenuator 86 and 3/12
Among the outputs of the 0-field delay circuit 82, the luminance signal is given to the cathode ray tube 90 via the gate circuit 84 and the video amplification circuit 88, and the chrominance signal is given from the video amplification circuit 88 to the cathode ray tube 90 via the matrix circuit 81. .
゛The goo 1 circuit 84 is set to always supply only the right side video signal to the video amplification circuit 88 when the left side video signal modulated by the subcarrier is not transmitted, and is connected to the cathode ray tube 90. Both left and right electronic shutters 91 and 92 are set to open. The selector switch 87 is set so that when the left side video signal is not transmitted, the output of the 1/2 attenuator 86 is always guided to the goo 1 to circuit 84, and when the left side video signal is input, the input signal is It is set so that the line is switched and guided to the 1/2 Hiff extension circuit 85, and the line is converted from an even line to an odd line.

On the other hand, the demodulated left-side video signal is applied to an A-D converter 93 and a synchronous II write O-clock pulse generation circuit 94. The synchronous separation write 0-ts pulse generation circuit 94 is constructed in the same manner as the synchronous separation write 0-ts pulse generation circuit 75 described above, and generates the 0-ts pulse based on the synchronous signal synchronously separated from the video signal. , this write clock pulse is given to the jΔ-D converter 93 and the write/read control circuit 96.

The A-D converter 93 converts the left-side video signal into a digital signal based on the write clock pulse and supplies the digital signal to the 2-field memory 95 . The write/read t,+ control circuit 96 provides a write control signal to the 2-field memory 95 based on the write clock pulse. Therefore, 21, field memory 95 stores the left video signal converted into a digital signal based on the write control ill signal. The video signal stored in the 2-field memory 9F5 is read out based on a successive control signal given from the m read control circuit 96 based on a 1/120 field clock pulse from a read clock pulse generation circuit 103, which will be described later. Ru.

In this way, by reading out the contents of the 2-field memory 95 based on the 1/120 field output pulse, the 1/60 field video signal is changed to 1/1 field.
It is converted into a 20-field video signal. The digital signals read from the two field memories (9") are D-, A
The signal is applied to a converter 97 and converted into an analog signal.

This analog signal is applied to the left side pseudo signal generation circuit 108. The left side pseudo signal generation circuit 108 includes a 2/120 field delay circuit 98 and a 4/120 field delay circuit 9.
9, an adder 100, and a 1/2 attenuator 101. Then, the left-side video signal converted into an analog signal is given to a 2/120 field delay circuit 98, a 4/120 field delay circuit 99, and an adder 100, and each delay circuit has a predetermined period of time. are delayed respectively. Then, the output of the D-A converter 97 and 4/1
The output of the 20-field delay circuit 99 is sent to an adder 100'c.
The signals are added and the output thereof is given to the 1/2 attenuator 101, which attenuates the output level of the added video signal by 1/2. Output of 1/2 attenuator 101 and 2/120 field! 11! Each output of circuit 98 is provided to gate circuit 84. The gate circuit 84 outputs the left video signal based on the output of the left video signal during the 1/120 field period.
At the same time as outputting the left side video signal to the video amplification circuit 88,
The right and side electronic shutters 92 are shut off and the left electronic shutter 91 is opened. Conversely, when the right video signal is output to the video amplification circuit 88, the left electronic shutter 91 is shut off and the right electronic shutter 92 is opened.

Therefore, the right video signal and the left video signal are 1/12
The signal is alternately applied to the video amplification circuit 88 for each 0 field. Further, a video signal is provided from the video amplification circuit 88 to the synchronization separation circuit 104. A synchronization separation circuit 104 separates vertical and horizontal synchronization signals included in the video signal, and the vertical synchronization signal is applied to a vertical oscillation output circuit 105 that oscillates a signal of 12'0 f, yield/Sec. No. 15 is applied to a horizontal oscillation output circuit 106 which outputs oscillation corresponding to the conventional double multiplication. Vertical oscillation output circuit 105
The respective outputs of the horizontal and horizontal oscillation output circuits 106 are given to the vertical and horizontal deflection circuits 107, which scan scanning lines in synchronization with the video signal input to the cathode ray tube 90, and project binocular parallax images on the cathode ray tube 90. .

Note that the DA converters 78 and 97 shown in FIG. The left and right video flit signals may be commonly converted into the ARJ-0 signal in this way. However, in this case, each delay circuit and adder 83.1
00 must be digital.

FIGS. 7A and 7B are diagrams showing in detail the main parts of the left and right image separation device 93 placed in front of the cathode ray tube 90 shown in FIG. 6 described above. In the example shown in FIG. 7Δ, a plurality of transparent bodies 901 having a triangular cross section are arranged so as to extend vertically in front of a cathode ray tube 90. Then, left and right electronic shutters 91 are provided on the two surfaces of this transparent body 901, respectively.
．． 92 is provided. These electronic shutters 91.92
G is made of liquid crystal or PLTZ ceramic, and opens and closes alternately in synchronization with the left and right images.

In addition, the pitch width P of each electronic shutter is made as small as possible to increase the resolution, and the apex angle 0 is selected appropriately depending on the viewing distance, so that the left and right eyes receive an equal image up to the left and right periphery of the screen. The corner mark α is selected for this purpose. , ' By configuring the electronic shutters 9L, 92 as described above, when the left/side image is projected on the Brown@900 light emitting surface, the left electronic shutter 91 is opened and the right electronic shutter 92 is shut off. Therefore, it can be viewed only by the left eye (light path → chain line), and when the right image is displayed, the right electronic shutter 92 is closed and the left electronic shutter 91 is closed.
is closed, so it can be seen only through the right eye (optical path→dotted line) 7. If the triangular transparent body 901 is made of synthetic resin and glass or the like, the mi effect for left and right images can be further enhanced due to the refraction effect.

In FIG. 7B, a lenticular element 902 having a semicircular cross section is provided in place of the triangular transparent body 901 shown in FIG. 7A. That is, a plurality of lenticular elements 902 each having a semicircular cross section are arranged on the front surface of the cathode ray tube 90 so as to extend in the vertical direction, and electronic vines 91 and 92 are attached so as to vertically divide the surface of each element into two. and,
In the same manner as described in FIG. 7A above, the left and right electronic shutters 91 and 92 are opened and closed in synchronization with the left and right video signals to separate the left eye image and the right eye image. It should be noted that the lenticular element 902 is not limited to one formed so as to protrude from the front surface of the cathode ray tube 90; on the contrary, the same effect can be obtained even if the lenticular element 902 is formed recessed and is an IC element.

Therefore, if a pair of left and right electronic shutters is provided separately for each pixel or a single primary color light emitter, and a plurality of lenticular elements are arranged horizontally in the pair of left and right electronic shutters, the amount of light and image quality will be reduced. However, the apparatus for separating left and right images according to an embodiment of the present invention shown in FIG. 7B can obtain the same image quality as before, and the left and right electronic shutters are 91. Furthermore, it does not require the complexity of precisely matching the lenticular element 902 to the R, G, and 8 light emitters.

FIG. 8 is a waveform diagram for explaining the operation of the /C receiver shown in FIG. 6.

Next, the operation of the preview receiver will be explained with reference to FIGS. 6 to 8. An output signal from a detection circuit (not shown) is input to a demodulation circuit 71, demodulated, and divided into a right video signal and a left video signal, respectively.

The separated right-side video signal (FIG. 8(a)) is applied to an A-D converter 74 and a synchronous 11+11 write clock pulse generation circuit 75.

The synchronization separation write clock pulse generation circuit 75 separates the synchronization signal from the video signal, generates a write clock pulse based on this synchronization signal, and supplies it to the A-1 converter 74 and the write/read control circuit 77. . A-1) The converter 74 converts the right video signal into a digital signal based on the write pulse and stores it in the 1-field memory 76. The digital signal stored in the 1-field memory 76 is read 1/120 given by the non-write successive control circuit 77 based on the read clock pulse from the read clock pulse generation circuit 102.
The signal is instantaneously output based on the read control signal of the field timing and is applied to the DA converter 78. That is, in the 1-field field memory 76, at the timing when the video signal corresponding to the 0°5 field is written, the digital signal is read out with a clock pulse corresponding to 120 fields/SeC, and the digital signal is sent to the D-Δ converter 78. is converted into an analog signal by Therefore, the video signal of 1/60 field shown in FIG. 8(a) is read out at the timing of 1/120 field as shown in FIG. 8(b), and is not shown in FIG. 8(C). Field conversion is performed to a video signal of /120 field.

The field-converted video signal is applied to a right cape pseudo signal generation circuit 79. In the right video signal generation circuit 79, 4
/120 field delay circuit 80 converts the video signal into 4/12
The 0 field period is delayed by 1 field, and the 2/120 field delay circuit 81 delays the video signal by 2/120 field periods.

4/120 field delayed video signal (Fig. 8)
d)) and the 2/120 field processed video signal (8th (e)) are modified by a brightener 83. Furthermore, the output level is increased to 17 by the 1/2 attenuator 86.
One video signal output after being attenuated to 2 (Fig. 8 (f))
Then, the 3/120 field H delay circuit 82 generates a 3/120 field period [delayed video signal (Fig. 8 (g)
) are alternately applied to the video amplification circuit 88 via the gate circuit 84 as 120-field video signals as shown in FIG. 8(,, h). The luminance signal and the color signal passed through the matrix circuit 81 are then applied to the cathode ray tube 90. In this case, the circuit 84. is set so that the gate always covers the right video signal when there is no input of the left video signal, and at the same time the left and right electronic shutters 91.
Since 92 is set to 1 to 1 to make it transparent, 120
It can be viewed as a flat image of field/Sec.

On the other hand, the demodulated and separated left video signal (Fig. 8 (i)
)) is applied to an A-D converter 93 and a synchronous 1IllI write clock pulse generation circuit 94. The synchronization separation write clock pulse generation circuit 94 separates the synchronization signal from the video signal, and based on this synchronization signal, generates an O-clock pulse and supplies it to the A-D converter 93 and the write successive control circuit 96. . The A/D converter 93 converts the left video signal into a digital signal based on the output pulse and stores it in the 2-field memory 95. The digital signal stored in the two-field register 95 is outputted from the write/read control circuit 96 based on the clock pulse given from the read clock pulse generation circuit 103. It is read out at the timing of 120 fields and D-
A converter 97 is provided. Therefore, the 2-field memory 95 successively outputs digital signals with clock pulses corresponding to 120 fields/sec at the timing when a video signal corresponding to 1.5 fields is written.

This digital signal is converted into an analog signal by a DA converter 97. In this way, as shown in FIG. 8(i),
The N/30 field video signal is field converted into a 1/120 field video signal (FIG. 8('k)). This field-converted video signal is applied to the left side pseudo signal generation circuit 108. In the left side pseudo signal generation circuit 108, the 4/120 field delay circuit 99
The delayed video signal (FIG. 8 (K)) is delayed by 120 field periods, and the video signal output from the D-A converter 97 (FIG. 8 (K)) is added by an adder 100. . Further, the output level of the adder 100 is attenuated by 1/2 by the 172 attenuator 101.

The attenuated /j video signal (Fig. 8 (w+)) is 2/j
The signal is supplied to the gate circuit 84 along with the video signal (FIG. 8(n)) delayed by 2/120 field periods in the 120 field delay circuit 98. Based on the output of the left video signal, the gate circuit 84 applies the left video III signal to the video amplifier circuit 88 for a 1/120 field period, shuts off the right electronic shutter 92, and shuts off the left electronic shutter 91.
open. Note that, when outputting the right video signal, the gate circuit 84 shuts off the left electronic shutter 91 and opens the right electronic shutter 92. Therefore, gate circuit 84
The video signal shown in FIG. 8 (0) output from
The left and right image amplifying circuits 88 are alternately filtered every 20 fields to be projected on the cathode ray tube 90 as binocular parallax images, and left and right electronic shutters 91 and 92 are transmitted via lenticular elements 902 as shown in FIG. 7B, for example. As each becomes transparent, it can be viewed as a three-dimensional image.

In addition, as explained in FIGS. 13 to 5 above, -I! The video signal that is input as an image becomes a video signal as shown in FIG. 8(p) by following the path described above, and the video signal reproduced by the image pickup device shown in FIG. Although the delay is delayed by one field period, there is almost no deterioration in image quality.

Further, although the time difference between audio and video is within an allowable range of 2 to 2.5 fields, even better results can be obtained by delaying the audio signal.

FIG. '9 is a diagram showing another example of the image receiving means included in the present invention. The image receiving means 1 shown in FIG.
21 is provided. A lens 122 is provided in front of the projection tube 121, and a first reflecting mirror 123 is provided in front of the lens 122. This first reflecting mirror 12
A second reflective mirror 124 is provided on the back side so as to be opposite to 3, and a transmission screen 125 is provided opposite to this second reflective mirror 124. Therefore, projection 1!
The image projected at 121 is reflected by a first reflecting mirror 123 via a lens 122, and this reflected image is further reflected by a second reflecting mirror 124 and displayed on a transmission screen 125. In front of the transmission screen 125 is a left and right image separation device 9 consisting of a transparent body 901 or lenticular element 902 and electronic shutters 91 and 92 as shown in FIG. 7A or FIG. 81I7B.
3 is provided. By configuring the image receiving means in this manner, it is possible to display an image that is more enlarged than the binocular parallax image projected on the cathode ray tube 90 shown in FIG. 6 described above.

FIG. 10 is a diagram showing another example of the image receiving means included in the present invention. The image receiving means shown in FIG. 10 is an application of the present invention to a front projection type image receiver. That is,
A lens 142 is provided in front of the projection tube 141, and a half mirror 143 having an angle of 45 degrees with respect to the optical axis is provided in front of this lens 142. Furthermore, a left electronic shutter 144 is provided in front of the half mirror 143 so as to be perpendicular to the optical axis. Further, a reflection mirror 146 is installed parallel to the half mirror 143, and a right electronic shutter 147 is installed in front of it so as to be orthogonal to the optical axis.

Note that the reflectance and transmittance of the half mirror 143 are selected so that the left and right output light amounts are equal, or a neutral density filter is provided on the right side, or the transmittance of the left and right electronic shutters 144 and 147 is selected.

A spur gear 149 is fixed to the reflecting mirror 146,
A worm gear 151 formed on the adjustment shaft 150 comes into contact with the spur teeth 11149. An adjustment knob 152 is provided on the other side of the adjustment shaft 151, and by turning this adjustment knob 152, the reflection mirror 146 is rotated in the same manner as described in FIG. 3 above, and the convergence adjustment mechanism is activated. configured.

As described above (by configuring the image receiving means - the left image projected from the C1 projection tube 141 passes through the lens 142 and the half mirror 143, and the left electronic shutter 144 is opened by a synchronization pulse of 1/120 field). The image on the right side is reflected by the half mirror 743, and then reflected by the reversing mirror 14.
6 is reflected again and projected onto the reflective screen 160 via the right electronic screen 11 and the ivy 147. In addition, in front of the anti-screen 160, a left and right image separation device 161 consisting of a transparent body 901 or a lenticular element 902 and electronic shutters 91 and 92 as shown in FIG. 7A or 7B is provided. It is being therefore,
A stereoscopic image can be easily obtained by viewing the left and right binocular parallax images projected on the reflective screen 160J with each of the left and right eyes.

Effectiveness of the Invention As described above, if this invention is used, the image capturing side can output a video signal corresponding to one eye in the conventional 60 fields.
Then, suppose that the video signal corresponding to the other eye is extracted every other field, its time axis is extended, the frequency is converted, and output, and the main carrier wave of the video signal C of one eye is modulated, and this video signal and the other eye are By modulating the subcarrier with the difference signal from the video signal and transmitting it as a high-frequency radio wave, the video (■) based on the left and right binocular parallax images is transmitted using the narrow-band subcarrier', and the current In addition, on the image receiving side, a video signal based on binocular parallax images is converted into a video signal corresponding to 120 fields, and a pseudo signal generating means is provided. By interpolating the gap between each field, a binocular parallax image is projected onto the image receiving means, and flicker can be reduced by alternately switching the left and right electronic shutters of the image receiving means, resulting in almost no deterioration in image quality. Therefore, it is possible to project a good stereoscopic image without flickering.Therefore, since there is less flicker, it is difficult to withstand viewing for a long time.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of an imaging device included in an embodiment of the present invention. FIG. 2 is a waveform diagram of the binocular parallax image I& signal output from the image pickup device shown in FIG. 3 to 5 are diagrams showing other embodiments of the i-image type included in the present invention; FIG. 3 is an illustrative diagram showing the optical system, and FIG. 1 is a schematic block diagram showing the electrical configuration, and FIG. 5 is a waveform diagram of video No. 18 output from the image pickup device. Figure 6 shows the television receiver I included in this invention.
A schematic block diagram does not show the electrical configuration of 1m. 7th Δ
This figure and FIG. 7B are diagrams showing details of the left and right video compartments provided in the brown box 7 shown in FIG. 6. II
FIG. 8 is a waveform diagram for explaining the operation of the receiver shown in FIG. FIG. 9 is a diagram showing another example of the image receiving means included in the present invention. FIG. 10 is a diagram showing another example of the image receiving means. In the figure, 1 is an image carrier; 3.13.3
2 is an image pickup tube, 19.47 is a phase discrimination circuit, 18.49 is a gate circuit, 20 is an A-D converter, 23 is 1 field memory, 25 is a DA converter, 33 is a right electronic shutter, 34 is a Left electronic shutter, 34 is half mirror 136
48 is a total reflection mirror, 48 is a knob 70, 50 is a right side pseudo signal generation circuit, 71 is a demodulation circuit, 74 and 93 are A-
D converter, 76 is 1 field memory, 78.97 is D
-A converter, 79 is a left side pseudo signal generation circuit, 95 is a 2-field memory, 108 is a right side pseudo signal generation circuit, 90
is a cathode ray tube, 91 is a left electronic shutter, 92 is a right electronic shutter, 121. "141 is a projection tube, 122.14
2 is a lens, 123 is a first reflecting mirror, 124 is a second
125 is a transmission screen, 126 is a left and right image separation device, 143 is a half mirror, 114'4 is a left electronic shutter, 146 is a total reflection mirror, 147 is a right electronic shutter, 60 is a reflection screen, 901 is a transparent body, and 902 is a lenticular element.

Claims (6)

[Claims] (1) A stereoscopic television device that obtains a video signal based on left and right binocular parallax images of a subject from an imaging device and projects a stereoscopic image on a television receiver, wherein the m image is as described above. an imaging means that images a subject and outputs a video signal based on left and right binocular parallax images; a synchronization signal generation means that generates synchronization signals corresponding to each of the odd field and the even field; and the synchronization signal generation means. Based on the output synchronization signal, the 6
a video signal output means for outputting a video signal of 0 field/sea; extracting means for extracting a video signal based on either one of the images every other field; and extending a time axis so that the video signal for every other field extracted by the extracting means becomes a field period. a time axis expansion means for outputting, and a main carrier wave is modulated based on the video output from the video signal output means, and a video signal from the video signal output means and a video signal from the time axis expansion means are combined. a transmission means for modulating and transmitting a subcarrier based on a difference signal, the television receiver comprising: demodulation means for demodulating the video signal transmitted from the transmission means; and a demodulation means for demodulating the video signal transmitted from the transmission means. a separating means for receiving the video signal and separating the right video signal and the left video signal, and arbitrarily separating either the right video signal or the left video signal separated by the separating means. a first storage means for storing an amount equivalent to a field; a second storage means for storing several fields of a video signal of the other of the right video signal and left video signal separated by the separation means; a first reading means for reading out the video signal stored in the storage means at a timing of 120 fields/SeC; and a first reading means for reading out the video signal stored in the second storage means at a timing r: 120 fields/SeC. and a first pseudo signal generating means for generating a pseudo signal for interpolating the gap between each field in the 120 fields/SeG video signal read by the first successive means. and a second pseudo signal generating means for generating a pseudo signal for interpolating the gap between each field in the 120 fields/see video signal read by the second reading means, and a pair of left and right electronic shutters. and alternately switching the pair of left and right electronic shutters based on the outputs of the first and second pseudo signal generating means to generate left and right binocular parallax based on the first and second pseudo signals. A stereoscopic television device equipped with an image receiving means for projecting an image. (2) The imaging means includes: an imaging device; a pair of reflecting mirrors installed in front of the imaging device to reflect left and right binocular parallax images of the subject and guide them to the imaging device; The left and right eyes are arranged in association with a pair of reflecting mirrors, are alternately switched based on odd field and even field synchronization signals from the synchronization signal generating means, and are guided to the image pickup device. A pair of electronic screen vines for alternately shielding the parallax images, and a pair of electronic screens for interpolating the gaps between each field in the 60-field sea video signal of either the right video signal or the left video signal. A stereoscopic television apparatus according to claim 1, comprising pseudo signal generating means for generating a pseudo signal. (3) The image receiving means includes a cathode ray tube and a plurality of triangular transparent bodies each having a triangular cross section and are provided to extend perpendicularly to the front surface of the cathode ray tube, and the pair of electronic shutters is arranged to connect each of the triangular transparent bodies to The stereoscopic television L according to claim 1, which is arranged alternately on two sides of (4) The image receiving means includes a cathode ray tube and a plurality of lenticular elements each having a semicircular cross section and arranged to extend perpendicularly to the front surface of the cathode ray tube, and the pair of electronic shutters includes a cathode ray tube and a plurality of lenticular elements each having a semicircular cross section. The stereoscopic television device according to claim 1, wherein the stereoscopic television device is arranged to vertically divide the surface of the stereoscopic television device. (5) The image receiving means includes a projection tube that projects the left and right binocular parallax images, a lens provided in front of the projection tube, and an image provided in front of the lens and projected through the lens. a first reflecting mirror configured to face the first reflecting mirror and reflecting the first reflecting mirror;
a second reflection mirror that reflects the image reflected by the reflection mirror; a transmission screen that is provided opposite to the second reflection mirror and transmits the image reflected by the second reflection mirror; The electronic shutter includes a plurality of triangular transparent bodies each having a triangular cross section or a lenticular element having a semicircular cross section, which are provided so as to extend vertically in front of the transmission screen, and each of the electronic shutters includes a plurality of triangular transparent bodies each having a triangular cross section or a lenticular element having a semicircular cross section. The stereoscopic television device according to claim 1, wherein the three-dimensional television device is arranged alternately on two surfaces of a circular lenticular element. (6) The image receiving means includes a projection tube for projecting the left and right binocular parallax images, a lens provided in front of the projection tube, and a lens provided in front of the lens and the projection tube on the same optical axis. a half mirror disposed; and a reflecting mirror disposed at a predetermined interval and substantially parallel to the half mirror; one of the pair of left and right electronic shutters is disposed in front of the half mirror; The other one is provided in front of the reflective mirror and further includes a reflective screen that reflects the projected image, and a plurality of lenticular elements that are provided to extend vertically in front of the reflective screen, and 1. 2. The stereoscopic television apparatus according to claim 1, wherein the pair of electronic shutters are arranged to vertically divide the surface of each of the lenticular elements.