JPH07107518A - Virtual stereoscopic display device - Google Patents

Abstract

PURPOSE:To provide a virtual stereoscopic effect in real time even with a normal video signal without performing any special artificial operation by displaying the video signal while using a clock whose frequency is modulated by the motion vector of an input video signal. CONSTITUTION:The motion vector is detected from a video signal 101 and a video signal 102, which is inputted from a delay circuit 1 for detection and delayed for a fixed term (such as one frame, for example,) and outputted by a motion vector detection circuit 2. This output is respectively inputted to PLL circuits 3 and 4 for left and right eyes. The PLL circuits 3 and 4 for left and right eyes modulate the clock frequencies based on the motion vector information from the motion vector detection circuit 2. Corresponding to the clock modulated to a prescribed frequency by the PLL circuits 3 and 4 for left and right eyes, driving circuits 5 and 6 wire picture elements and display video signals on liquid crystal panels 7 and 8. Thus, a user who wears the binocular display device can obtain the virtual stereoscopic effect with the normal video signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pseudo stereoscopic display device for pseudo stereoscopic display of video signals in a binocular display device.

[0002]

2. Description of the Related Art In recent years, a so-called binocular head mount display (hereinafter abbreviated as HMD) has been developed which is mounted on the head and has independent display sections for the left and right eyes. In the binocular HMD, the left and right display parts are independent, so separate video signals with parallax are input to the left and right,
It is possible to present a stereoscopic image to the wearer.

[0003]

However, a binocular HMD
In addition to the above, in order to give separate right and left signals for displaying a stereoscopic image, two cameras are used in the case of real time, and two VTs are used in the case of reproducing the recorded one.
For example, R is used, and two types of video signals are required. Also, the Institute of Television Engineers, Vol. 43, No. 8
pp. As described in 763 to 767, the left and right video signals can be switched for each field and recorded as one system of video signal, and the left and right displays can be switched for each field during playback to provide a stereoscopic display. Although it is said that it was originally recorded as a stereoscopic image,
It was only possible to deal with signals generated as stereoscopic images on a computer or the like.

Further, Japanese Patent Application Laid-Open No. 53-20347 discloses a pseudo-stereoscopic image device which reproduces two images by a common video signal and gives a stereoscopic effect by giving a difference in luminance or time. Although described, a special control signal indicating what kind of stereoscopic effect is given is necessary for pseudo-stereoscopic visualization, and the control signal must be artificially set in advance. Therefore, a normal video signal cannot be displayed immediately. Further, there is a drawback that the optical system becomes large in scale because a plurality of concave mirrors and lenticular lenses are used.

Therefore, it is an object of the present invention to realize a small pseudo-stereoscopic display device in which a pseudo-stereoscopic effect can be obtained in real time even with a normal video signal without performing a special artificial operation. Is.

[0006]

A pseudo-stereoscopic display device of the present invention is a binocular display device having independent display portions for the left and right eyes, and motion vector detection for detecting a motion vector of an input video signal. A circuit, and a PLL circuit that is independent for the left eye and the right eye and that modulates a clock frequency by the output of the motion vector detection circuit, and the display unit uses a clock frequency-modulated by the PLL circuit. It is characterized in that the video signal is displayed.

Alternatively, in a binocular display device having independent display units for the left and right eyes, a motion vector detection circuit for detecting a motion vector of an input video signal and an independent motion vector detection circuit for the left and right eyes are provided. And a contrast control circuit that controls the contrast of the video signal according to the output of the motion vector detection circuit, and the display unit displays the video signal whose contrast is controlled by the contrast control circuit. .

Alternatively, in a binocular display device having independent display sections for the left and right eyes, a motion vector detection circuit for detecting a motion vector of an input video signal and an independent motion vector detection circuit for the left and right eyes are provided. And a low-pass filter circuit that controls the pass band of the video signal according to the output of the motion vector detection circuit, and the display unit displays the video signal whose pass band is controlled by the low-pass filter circuit. It is characterized by doing.

Alternatively, in a binocular display device having independent display units for the left and right eyes, a motion vector detection circuit for detecting a motion vector of an input video signal and an independent motion vector detection circuit for the left and right eyes are provided. And a saturation control circuit for controlling the saturation of the video signal according to the output of the motion vector detection circuit, wherein the display section displays the video signal whose saturation is controlled by the saturation control circuit. Is characterized by.

[0010]

(Embodiment 1) FIG. 1 shows a first embodiment of the present invention.

The video signal 101 is input to the detection delay circuit 1 composed of a frame memory. The output of the detection delay circuit 1 is input to the motion vector detection circuit 2. The motion vector detection circuit 2 detects a motion vector from the video signal 101 and the video signal 102 input from the detection delay circuit 1 and delayed for a fixed period (for example, one frame), and outputs the motion vector. The output of the motion vector detection circuit 2 is the PL for the left eye.
It is input to the L circuit 3 and the right-eye PLL circuit 4, respectively.
The left-eye PLL circuit 3 and the right-eye PLL circuit 4 modulate the clock frequency based on the motion vector information from the motion vector detection circuit 2. The drive circuits 5 and 6 write the pixels of the liquid crystal panels 7 and 8 by a clock modulated to a predetermined frequency by the PLL circuits 3 and 4, and display video signals.

FIG. 2 shows an example of a binocular HMD incorporating the liquid crystal panels 7 and 8.

Driving circuits 5 and 6 to which one end of a connecting cord 202 is connected are housed in an eyeglass-type frame 201. A pair of left and right liquid crystal panels 7 and 8 and a backlight 204 that illuminates the liquid crystal panels 7 and 8 from the back are mounted on the front surface of the frame 201. The liquid crystal panels 7 and 8 and the eyeball 205 of the wearer. A magnifying lens 203 is provided on the inner surface of the frame 201 between. Then, the clock 106 whose frequency is modulated by the PLL circuit and the video signal 101 are sent via the connection cord 202. The driving circuits 5 and 6 are clock-modulated clock 1
The video signal is decoded using 06, and the liquid crystal panels 7 and 8
The left and right are independently displayed.

The liquid crystal panels 7 and 8 have a screen size of 0.7.
It is an ultra-compact full-color or monochrome liquid crystal panel of about 1 to 1.3 inches, and is magnified to about 30 inches by a magnifying lens 203 at a position of a visual distance of about 1 m so that it can be seen as a virtual image by an observer. . The left eyeball has a liquid crystal panel 7 and a backlight 20.
4 and a magnifying lens 203 are incorporated, and a liquid crystal panel 8, a backlight 204 and a magnifying lens 203 are incorporated in the right eye 205, and when the same video signal is displayed, a single display screen that is natural for binocular vision Are arranged so that you can see.

FIG. 8 shows an example of characteristics of the motion vector detecting circuit. The horizontal axis represents the magnitude of movement, and the vertical axis represents the control output. The control output increases as the movement increases, and the saturation characteristic is used so that the output does not become excessive at the upper limit.

Here, FIG. 3 shows an example of the output of the motion vector detection circuit 2 for a certain scanning line. The horizontal axis represents the time t, and the vertical axis represents the control output. now,
It is assumed that an object moves and an output 301 is obtained. The magnitude of the output 301 is determined by the control output characteristic 802 shown in FIG. Differentiating the output 301 yields the output 401 shown in FIG. The horizontal axis of FIG. 4 indicates the time t, and the vertical axis indicates the control output. This control output 40
1 is used to change the clock frequency near a moving object.

FIG. 5 shows a block diagram of the PLL circuits 3 and 4.

The output of the VCO 503 is frequency-divided by the frequency divider 507 and then fed back to the phase detector 501, where it is compared with the horizontal synchronizing signal 504 of the input video signal 101. The output of the phase detector 501 is the error voltage 505, which is a DC voltage proportional to the phase difference between the horizontal synchronizing signal 504 and the output of the frequency divider 507. The error voltage 505 is passed through a low pass filter 502 to remove high frequency noise, and the VCO
Return to 503. Error voltage 50 with this high frequency noise removed
6 and the phase detector 501 to reduce the phase between the horizontal synchronizing signal 504 and the output of the frequency divider 507.
It operates to change the frequency of 03. At this time, the DC output of the control output 301 shown in FIG. 3 is cut by the capacitor 508 to obtain the differentiated control output 401, which is added to the error voltage 506 by the adder 509 to obtain V
A clock 106 is obtained by changing the oscillation frequency of the CO 503. Since this change is higher than the cutoff frequency of the low pass filter 502, the PLL circuit does not respond as a loop. Since the control output 301 is the control output shown in FIG. 3, it is possible to obtain the control output shown in FIG.
A differentiated control output such as 1 is obtained.

FIG. 9 shows the characteristics of the VCO 503. The horizontal axis represents the magnitude of the control output 401 obtained by AC coupling the control output 301 of the motion vector detection circuit 2, and the vertical axis represents the oscillation frequency. As the control output 401 increases, the oscillation frequency becomes higher than the oscillation frequency 901 when the control output 401 is 0 (when there is no movement), and the control output 401
Becomes smaller, the oscillation frequency becomes lower than the oscillation frequency when the control output 401 is 0 (when there is no movement).

FIGS. 6 and 7 are diagrams showing how the image for the right eye and the image for the left eye change when this embodiment is used when there is a moving sphere A on the screen. The screen 621 having the moving sphere A is driven by the clock 601 and the sphere A is displayed at the position of 607 on the screen 621.
It is assumed that the control output of the motion vector has a waveform as shown by 301 in FIG. 3 and the control output 401A is obtained. The control output 401A is added to the adder 509 of the PLL circuit for the right eye, so that the clock 601 outputs the control output 401A.
At the position of 611 where the maximum is the highest, the VCO oscillation frequency is the highest and the control output 401A is the lowest 61
At position 3, the VCO oscillation frequency becomes the lowest. Therefore, the output from the VCO 503 of the PLL circuit 4 for the right eye is
As in the case of the clock 106A, the video signal is written into the liquid crystal panel 8 earlier, so that the writing of the sphere A is also performed earlier, and the sphere A is displayed at the position 604 which is shifted leftward from the original position 607. , An image 622 for the right eye is obtained. On the other hand, for the image for the left eye, the output from the motion vector detection circuit 2 is inverted by the inversion circuit 9, so the control output 401A is also inverted, and the inverted control output 401B is added to the adder 509 of the PLL circuit for the left eye. By being
The clock 601 has the largest control output 401B. 6
The oscillation frequency of the VCO is highest at the position 12 and the oscillation frequency of the VCO is lowest at the position 614 where the control output 401B is the smallest. Therefore, the output from the VCO 503 of the PLL circuit 5 for the left eye is like the clock 106B, and the writing of the video signal to the liquid crystal panel 7 is delayed, so that the writing of the sphere A is also delayed, and the sphere A is
The image is displayed at a position 605 which is shifted to the right from the original position 607, and a left-eye image 623 is obtained. The deviation amounts 608 and 609 from the original position 607 of the sphere A on the right-eye image 622 and the left-eye image 623 obtained at this time are equal.

FIG. 10 is a plan view showing a state where the binocular HMD shown in FIG. 2 is worn. The left eyeball 205L is looking at the liquid crystal panel 7, and the right eyeball 205R is looking at the liquid crystal panel 8. If there is a moving object here, the display position of the right liquid crystal panel shifts to the left and the display position of the left liquid crystal panel shifts to the right as described above. Are displayed at different positions as shown as the object 104. Binocular view of this
It is visible on the virtual screen 111 shown in FIG. The moving object appears as the object 103 to the left eyeball 205L and the object 104 to the right eyeball 205R, so that parallax occurs due to binocular vision, and the moving object appears as the object 113 to the front. Here, if the clock frequency is not modulated, the object is displayed at the same position on the liquid crystal panels 7 and 8 and appears as the object 112 on the virtual screen 111. Therefore, in this embodiment, it can be seen that the stereoscopic effect can be obtained by the fact that the object 112 jumps up to the position of the object 113. Further, the faster the movement is, the larger the control output of the motion vector detection circuit is, and the larger the maximum value of the clock frequency is.

Further, by changing the characteristic of the motion vector detecting circuit 2 shown in FIG. 8, the pop-out method can be changed. For example, by making the control outputs when the object moves to the right and to the left have opposite polarities, when it moves to the right, it jumps out to the front, and when it moves to the left, it can be retracted to the back. On the contrary, when you move to the left, you can jump out to the front, and when you move to the right, you can make it retract. In addition, by setting the control output when moving to a negative polarity, it is possible to retract a moving object.

In this embodiment, the binocular HM shown in FIG. 2 is used.
Although it is shown that the blocks after the driving circuits 5 and 6 in FIG. 1 are mounted in D, it is obvious that all the blocks in FIG. 1 can be mounted.

(Embodiment 2) FIG. 12 shows a second embodiment of the present invention.

The video signal 101 is input to the detection delay circuit 1 composed of a frame memory. The output of the detection delay circuit 1 is input to the motion vector detection circuit 2. The motion vector detection circuit 2 detects a motion vector from the video signal 101 and the video signal 102 input from the detection delay circuit 1 and delayed for a fixed period (for example, one frame). The output of the motion vector detection circuit 2 is input to the left eye contrast control circuit 121 and the right eye contrast control circuit 122, respectively. Left eye contrast control circuit 121
The right eye contrast control circuit 122 changes the contrast based on the motion vector information from the motion vector detection circuit 2, and the drive circuits 5 and 6 change the video signal to a predetermined contrast by the contrast control circuits 121 and 122. Is displayed on the liquid crystal panels 7 and 8. The contrast control circuit can be realized, for example, by controlling the amplification factor of the video signal amplification circuit and changing the signal amplitude. Here, the visual characteristics of the human eye will be described.
It is generally said that the higher the contrast, the closer the human eye feels, and the lower the contrast, the farther the human eye feels. (Reference: Chihiro Masuda, 3D Display, Industrial Book, 1990) This is because when a human observes an outdoor scene, the scenery generally has a clear contrast in a near area and a low contrast in a distant area. It seems that the visibility is influential. By utilizing this phenomenon, the contrast of the image is changed based on the embodiment described above to enhance the stereoscopic effect.

FIG. 13 shows a contrast control circuit 121,
An example of the characteristic of 122 is shown. The horizontal axis represents the control input from the motion vector detection circuit 2, and the vertical axis represents the contrast enhancement coefficient. When the control input is zero, the coefficient is 1, and the video signal 101 is output as it is. Further, the coefficient increases as the control input increases. That is, the larger the movement, the higher the contrast.

Considering that there is a moving object and the motion vector detection circuit 2 shows the output 801 in FIG. 8, the control inputs of the contrast control circuits 121 and 122 are as shown by 130 in FIG. And the contrast enhancement coefficient has a value of 134.

In this way, by emphasizing the contrast of the moving object, the emphasizing portion appears to pop out to the front. Further, the faster the movement is, the larger the control output of the motion vector detection circuit is, and the larger the contrast emphasis coefficient is, so that the pop-out amount is also increased.

Further, by changing the characteristics of the motion vector detection circuit 2 shown in FIG. 8 and the characteristics of the contrast control circuit shown in FIG. 13, the pop-out method can be changed. For example, the characteristics of the motion vector detection circuit 2 are set such that the control outputs when the object moves to the right and when the object moves to the left have opposite polarities, and the characteristics of the contrast control circuit are set to 141 as shown in FIG. When it moves to the left, the contrast is emphasized so that it pops out toward the front, and when it moves to the left, the contrast is lowered so that it retracts to the back, and vice versa.
With such a characteristic, when moving to the left, the contrast is emphasized so that the contrast pops out toward the front, and when moving to the right, the contrast is lowered and the contrast is retracted. In addition, by setting the control output when moving to a negative polarity, it is possible to retract a moving object. If the contrast cannot be emphasized in a high-contrast image, the point 131 shown in FIG. 13 is moved in the 132 direction to have the characteristic 133, or the point 143 shown in FIG. 14 is moved in the 144 direction to show the characteristic. For example, 145 and 146 can be used to reduce the overall contrast.

Further, since the left-eye and right-eye contrast control circuits are independent of each other, for example, the output from the motion vector detection circuit is inverted and the control input value input to the contrast control circuit is changed to the left and right. By changing
By changing the contrast between the right eye and the left eye, it is possible to obtain a stereoscopic effect by the Pulfrich principle.

(Embodiment 3) FIG. 15 shows a third embodiment of the present invention.

The video signal 101 is input to the detection delay circuit 1 formed of a frame memory. The output of the detection delay circuit 1 is input to the motion vector detection circuit 2. The motion vector detection circuit 2 detects a motion vector from the video signal 101 and the video signal 102 input from the detection delay circuit 1 and delayed for a fixed period (for example, one frame).
The output of the motion vector detection circuit 2 is input to the left-eye low-pass filter circuit 151 and the right-eye low-pass filter circuit 152, respectively. Left-pass low-pass filter circuit 15
1 and the low-pass filter circuit 152 for the right eye control the cutoff frequency of the low-pass filter (hereinafter abbreviated as LPF) circuit based on the motion vector information from the motion vector detection circuit 2, and the drive circuits 5 and 6 are , LPF circuits 151, 15
The video signal converted into the predetermined frequency band by 2 is displayed on the liquid crystal panels 7 and 8.

The visual characteristics of the human eye will now be described. Generally, the higher the resolution, the closer the human eye feels,
It is said that things with low resolution feel far away. (Reference: Chihiro Masuda, 3D Display, Industrial Books 19
90) It is thought that this is because the human eye has the property that the closer it is, the more clearly it can be seen, and the farther it appears, the more blurred it becomes.
In addition, it seems that when the focus is on what you are looking at, other things are blurred. For example, as shown in FIG. 16, if there is an image in which large and small rings are randomly arranged, when observing a ring 161 having high resolution and sharpness and a ring 162 having low resolution and being blurred, the ring 161 having high resolution is better. I feel that it is in front of the low resolution ring 162. By utilizing this fact, the sharpness (resolution) of the contour of the video signal is controlled by controlling the video cutoff frequency based on the embodiment described above, and the stereoscopic effect is enhanced.

FIG. 17 shows an example of the characteristics of the LPF circuits 151 and 152. The horizontal axis represents the control input from the motion vector detection circuit 2, and the vertical axis represents the LPF cutoff frequency. The larger the control input (the larger the movement), the higher the cutoff frequency, and the smaller the control input (the smaller the movement), the lower the cutoff frequency. That is, the smaller the movement, the lower the resolution, and the more blurred the image, and the larger the movement, the higher the resolution, and the clearer the image.

If the resolution is too low, the image cannot be recognized, so the LPF has a minimum cutoff frequency of 171. Considering that there is a moving object and the motion vector detection circuit 2 shows the output 803 in FIG. 8, the control inputs of the LPF circuits 151 and 152 are
As indicated by 170 in FIG. 17, the cutoff frequency has a value of 172.

In this way, the cutoff frequency of the LPF is adjusted to increase or decrease the resolution of the object, so that the object having a larger motion has a higher resolution, and the object having a lower resolution has a higher resolution. It appears to pop out.

Further, by changing the characteristics of the motion vector detecting circuit 2 shown in FIG. 8 and the characteristics of the LPF circuit shown in FIG. 17, the pop-out method can be changed. For example, if the characteristics of the motion vector detecting circuit 2 are set such that the control outputs when the object moves to the right and when the object moves to the left have opposite polarities, and the LPF circuit is set to 181 shown in FIG. 18, the LPF circuit moves to the right. Increase the pass frequency band of the circuit so that it jumps out toward you, and when you move to the left, lower the pass frequency band of the LPF circuit so that you can retract it to the back, and vice versa.
It is also possible to have a characteristic like 82 so that when it moves to the left, it pops out to the front, and when it moves to the right, it can be pulled back. In addition, by setting the control output when moving to a negative polarity, it is possible to retract a moving object.

(Embodiment 4) FIG. 19 shows a fourth embodiment of the present invention.

The video signal 101 is input to the detection delay circuit 1 composed of a frame memory. The output of the detection delay circuit 1 is input to the motion vector detection circuit 2. The motion vector detection circuit 2 includes a video signal 101 and a video signal 102 which is input from the detection delay circuit 2 and is delayed for a predetermined period.
To detect the motion vector. Motion vector detection circuit 2
The output of is input to the saturation control circuit 191 for the left eye and the saturation control circuit 192 for the right eye, respectively. The saturation control circuit 191 for the left eye and the saturation control circuit 192 for the right eye change the saturation based on the motion vector information from the motion vector detection circuit 2, and the drive circuits 5 and 6 use the saturation control circuit 191, The video signal, which has been converted to a predetermined saturation by 192, is displayed on the liquid crystal panel 7,
Display on 8.

Here, the visual characteristics of the human eye will be described. Generally, it is said that the human eye feels closer to a person with higher saturation and feels closer to a person with lower saturation. (Reference: Chihiro Masuda, 3D Display, Industrial Books, 1990)
Usually, when a human observes an outdoor scene, the color of an object near the scene is generally vivid, but the distant scene is desaturated due to various conditions in the atmosphere. It is believed that saturation affects the stereoscopic effect. For example, as shown in FIG. 20, there is an image of uniform color, and the saturation is increased only in the portion 201, and
When the saturation is reduced in the area 02, it is felt that the quadrangle 201 having the higher saturation is closer to the quadrangle 202 having the lower saturation. Utilizing this fact, the saturation of the image is changed based on the embodiment described above to enhance the stereoscopic effect.

FIG. 21 shows an example of the characteristics of the saturation control circuits 191 and 192. The horizontal axis represents the control input from the motion vector detection circuit 2, and the vertical axis represents the saturation enhancement coefficient. When the control input is zero, the coefficient is 1 and the video signal 1
01 is output as it is. Further, the coefficient increases as the control input increases. That is, the greater the movement, the higher the saturation.

Considering that there is a moving object and the motion vector detection circuit 2 shows the output 804 in FIG. 8, the control inputs of the saturation control circuits 191 and 192 are as shown in FIG.
210, and the saturation emphasis coefficient has a value of 214.

In this way, by emphasizing the saturation of the moving object, the emphasizing portion appears to pop out to the front. Further, the faster the movement is, the larger the control output of the motion vector detection circuit is, and the greater the saturation emphasis coefficient is, so that the pop-out amount is also increased.

Further, by changing the characteristics of the motion vector detecting circuit 2 shown in FIG. 8 and the characteristics of the saturation control circuit shown in FIG. 21, it is possible to change the pop-out method. For example, the characteristics of the motion vector detection circuit 2 are set such that the control outputs when the object moves to the right and when the object moves to the left have opposite polarities, and the characteristics of the saturation control circuit move to the right as shown by 221 in FIG. When it moves, it emphasizes the saturation and pops it toward you, and when it moves to the left, it lowers the saturation and pulls it back.
On the contrary, a characteristic like 222 may be adopted so that when moving to the left, the saturation is emphasized so that it pops out toward the front, and when moving to the right, the saturation is lowered and the interior is retracted. it can. In addition, by setting the control output when moving to a negative polarity, it is possible to retract a moving object. If the saturation cannot be emphasized in a highly saturated image, the point 211 shown in FIG. 21 is moved in the direction of 212 to make it look like the characteristic 213 or the point 223 shown in FIG.
It is possible to reduce the overall saturation by moving in the direction and setting the characteristics 225 and 226.

[0045]

As described above, according to the present invention, the motion vector of a video signal is detected, the clock frequency of the video signal is modulated according to the output, the contrast is controlled, or the video signal is controlled. By controlling the pass band or saturation of the image and displaying it on the liquid crystal panel, a specially prepared video signal for displaying a stereoscopic image due to parallax can be used, or a special artificial It is possible to provide a wearer of a binocular display device with a small pseudo-stereoscopic image device that can obtain a pseudo-stereoscopic effect with a normal video signal without performing an operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing an example of a binocular HMD of the present invention.

FIG. 3 is a diagram showing an example of an output of a motion vector detection circuit in a scanning line according to the present invention.

4 is a diagram showing a result of AC coupling of outputs of the motion vector detection circuit of FIG.

FIG. 5 is a block diagram of a PLL circuit of the present invention.

FIG. 6 is a diagram showing how the right-eye image changes when the clock frequency is changed using the PLL circuit of the present invention.

FIG. 7 is a diagram showing how the left-eye image changes when the clock frequency is changed using the PLL circuit of the present invention.

FIG. 8 is a diagram showing an example of characteristics of the motion vector detection circuit of the present invention.

FIG. 9 is a diagram showing VCO characteristics of the PLL circuit of the present invention.

FIG. 10 is a plan view showing a mounting example of the binocular HMD of the present invention.

FIG. 11 is a diagram illustrating stereoscopic vision of the present invention.

FIG. 12 is a block diagram showing a second embodiment of the present invention.

FIG. 13 is a diagram showing an example of characteristics of the contrast control circuit of the present invention.

FIG. 14 is a diagram showing an example of characteristics of the contrast control circuit of the present invention.

FIG. 15 is a block diagram showing a third embodiment of the present invention.

FIG. 16 is a diagram for explaining the visual characteristics of the human eye.

FIG. 17 is a diagram showing an example of characteristics of the LPF circuit of the present invention.

FIG. 18 is a diagram showing an example of characteristics of the LPF circuit of the present invention.

FIG. 19 is a block diagram showing a fourth embodiment of the present invention.

FIG. 20 is a diagram for explaining the visual characteristics of the human eye.

FIG. 21 is a diagram showing an example of characteristics of a saturation control circuit of the present invention.

FIG. 22 is a diagram showing an example of characteristics of a saturation control circuit of the present invention.

[Explanation of symbols]

1 Delay Circuit for Detection 2 Motion Vector Detection Circuit 3 PLL Circuit for Left Eye 4 PLL Circuit for Right Eye 5 Drive Circuit 6 Drive Circuit 7 Liquid Crystal Panel 8 Liquid Crystal Panel 9 Inversion Circuit 101 Video Signal 102 Video Signal Delayed for a Certain Period 106 Frequency Modulated clock output 201 Frame 202 Connection code 203 Magnifying lens 204 Backlight 205 Eyeball 301 Control output 401 Control output 501 Phase detector 502 Low pass filter 503 VCO 504 Horizontal sync signal 505 Error voltage 506 of video signal 101 High frequency noise Removed error voltage 507 Frequency divider 508 Condenser 509 Adder 601 Clock without frequency modulation 604 Display position of sphere A 605 Display position of sphere A 607 Display position of sphere A 608 Amount of deviation from the original position of sphere A 609 Deviation amount from the original position of sphere A 610 Original center position of sphere A 611 Position where oscillation frequency of VCO is maximum 612 Position where oscillation frequency of VCO is maximum 613 Position where oscillation frequency of VCO is minimum 614 VCO 621 Video screen 622 Right eye video 623 Left eye video 801 Control output 802 Control output characteristics of motion vector detection circuit 803 Control output 804 Control output 901 Oscillation frequency of VCO when there is no motion 103 Object 104 Object 111 Virtual screen 112 Object 113 Object 121 Left eye contrast control circuit 122 Right eye contrast control circuit 130 Control input of the contrast control circuit 131 Point indicating contrast enhancement coefficient when movement is 0 132 Contrast enhancement coefficient is small Direction 33 the control output of the control output 134 the motion vector detection circuit of the contrast control circuit 80 of FIG. 8
Value of contrast enhancement coefficient when 1 141 Control output of contrast control circuit 142 Control output of contrast control circuit 143 Point indicating contrast enhancement coefficient when movement is 0 144 Direction of decreasing contrast enhancement coefficient 145 Control of contrast control circuit Output 146 Control output of contrast control circuit 151 Left eye LPF circuit 152 Right eye LPF circuit 161 Ring with higher resolution 162 Ring with lower resolution 170 Control input of LPF circuit 171 Minimum cutoff frequency of LPF circuit 172 Motion vector detection The control output of the circuit is 80 in FIG.
Value of cutoff frequency of LPF circuit at 3 181 Control output of LPF circuit 182 Control output of LPF circuit 191 Saturation control circuit for left eye 192 Saturation control circuit for right eye 201 Square with increased saturation 202 Saturation Lowered square 210 Control input 211 of saturation control circuit 211 Point indicating saturation enhancement coefficient when motion is 0 212 Direction in which saturation enhancement coefficient decreases 213 Control output of saturation control circuit 214 Control of motion vector detection circuit The output is 80 in Figure 8.
Value of saturation enhancement coefficient when 4 221 Control output of saturation control circuit 222 Control output of saturation control circuit 223 Point indicating saturation enhancement coefficient when motion is 0 224 Direction of decreasing saturation enhancement coefficient 225 Saturation control circuit control output 226 Saturation control circuit control output

Claims (4)

[Claims] 1. A binocular display device having independent display units for the left and right eyes, and a motion vector detection circuit for detecting a motion vector of an input video signal, and an independent motion vector detection circuit for the left and right eyes. And a PLL circuit that modulates a clock frequency according to the output of the motion vector detection circuit, and the display unit displays the video signal using a clock frequency-modulated by the PLL circuit. Display device. 2. A binocular display device having independent display units for the left and right eyes, and a motion vector detection circuit for detecting a motion vector of an input video signal, and an independent motion vector detection circuit for the left and right eyes. And a contrast control circuit that controls the contrast of the video signal according to the output of the motion vector detection circuit, and the display unit displays the video signal whose contrast is controlled by the contrast control circuit. Pseudo three-dimensional display device. 3. A binocular display device having independent display units for the left and right eyes, and a motion vector detection circuit for detecting a motion vector of an input video signal, and an independent motion vector detection circuit for the left and right eyes. And a low-pass filter circuit that controls the pass band of the video signal according to the output of the motion vector detection circuit, and the display unit displays the video signal whose pass band is controlled by the low-pass filter circuit. A pseudo-stereoscopic display device characterized by: 4. A binocular display device having independent display units for the left and right eyes, and a motion vector detection circuit for detecting a motion vector of an input video signal, and an independent motion vector detection circuit for the left and right eyes. And a saturation control circuit for controlling the saturation of the video signal according to the output of the motion vector detection circuit, wherein the display section displays the video signal whose saturation is controlled by the saturation control circuit. Pseudo-stereoscopic display device.