JPH06217347A - Stereoscopic video image display system - Google Patents

Abstract

PURPOSE:To provide the eyeglass type stereoscopic video display system without flicker with comparatively simple configuration and excellent in compatibility with an existing 2D television system. CONSTITUTION:The system is provided with a flat panel display device 67 in which picture elements are arranged as a matrix to synthesize and display two systems of input picture signals having parallax information corresponding to left and right eyes of a watcher respectively, a polarizing plate 68 arranged to the front face, and TN liquid crystal panels 70 arranged corresponding to picture elements of the flat panel display device 67. Then the light passing through the polarizing plate 68 is emitted from the TN liquid crystal panel 70 while the polarizing angle of the light passing through the polarizing plate 68 is made different by 90 deg. for each picture element of the flat panel display device 67 corresponding to the video image of left and right eyes and the watcher wears a polarizing eyeglass 15 whose left and right polarizing angles differ by 90 deg. to watch a stereoscopic video image.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display system using polarized glasses.

[0002]

2. Description of the Related Art A stereoscopic image display method using polarized glasses is roughly classified into a polarization method and a time division method. In the polarization system, two systems of input image signals having parallax information corresponding to the left and right eyes of the viewer are superimposed on the two systems of image display devices in which polarizing plates with different polarization angles of 90 ° are arranged in front of them. This is a method of displaying and separating stereoscopic images with polarizing glasses having corresponding polarization angles.

FIG. 14 shows a conventional stereoscopic image display system using a polarization system. In this example, the left-eye TV camera 58
The image for the left eye photographed in (1) is displayed on the display for the left eye 75 having the first polarizing plate 77 arranged on the front surface. Further, the right-eye image captured by the right-eye television camera 59 is displayed on the right-eye display 76 in which a second polarizing plate 78 having a polarization angle different from that of the first polarizing plate 77 by 90 ° is arranged on the front surface. Then, these display images are combined by the half mirror 79. Viewers have left and right eyes with polarization angles of 9
By viewing the image with polarizing glasses 8 different by 0 °, the images of the left and right eyes can be separated to obtain a stereoscopic image.

A stereoscopic image display device using a liquid crystal projection type device is shown in FIG. In this liquid crystal projection type stereoscopic image display device, as shown in the figure, a first polarizing plate 4 is provided on the front surface of a projection lens for an image for the left eye taken by a television camera 58 for the left eye.
The image is projected on the screen 14 by the liquid crystal projection display device 39 for the left eye in which 1 is arranged.

A right-eye liquid crystal in which a right-eye image taken by the right-eye television camera 59 is arranged in front of a projection lens with a second polarization plate 42 having a polarization angle different from that of the first polarization plate 41 by 90 °. The projection device 40 projects the image on the screen 14 and displays both images in an overlapping manner. A viewer observes this image by wearing polarizing glasses 15 corresponding to the left and right eyes and having mutually different polarization angles of 90 °, thereby separating the images of the left and right eyes to obtain a stereoscopic image.

However, the above system has a problem that the system configuration is relatively large because it requires two systems of video devices, and a problem of alignment occurs when images of two systems are displayed in an overlapping manner. There is a difficulty to do it.

A stereoscopic image display device having a simple structure without providing two light sources and having improved operability is disclosed in Japanese Patent Application Laid-Open No. 2-1652.
No. 4 publication. This device includes a polarization beam splitter that splits light source light into a plurality of light paths, and a pair of transmissive liquid crystal elements interposed in each light path and driven based on a left-eye video signal and a right-eye video signal, respectively. And a combining means for combining the transmitted light from the pair of transmissive liquid crystal elements, and an optical means for projecting the light from the combining means onto a screen.

According to this apparatus, it is not necessary to provide two light sources for the left-eye image and the right-eye image, and the structure can be simplified. However, even with this device, compatibility with the existing 2D television is difficult.

On the other hand, the time division method converts two input image signals having parallax information corresponding to the left and right eyes of a viewer into one signal by time division conversion, and a polarizing plate and a liquid crystal shutter on the front surface. The image is displayed on the image display device arranged in close contact with each other, and the polarization angles of the images of the left and right eyes are changed by 90 ° by turning on / off the time-sharing shutter, and separated by the polarized glasses having the corresponding polarization angle. Then, a stereoscopic image is viewed (see Japanese Patent Application Laid-Open No. 2-122790).

FIG. 16 shows the configuration of a conventional stereoscopic image display system using the time division method. In this example, the left-eye image captured by the left-eye TV camera 58 and the right-eye image captured by the right-eye TV camera 59 are time-division conversion device 80.
Time-division conversion is performed by using the display 81, and the display 81 is alternately displayed for each field, and the polarizing plate 82 disposed on the front surface of the display 81 and the liquid crystal shutter 13 that is turned on / off for each field by the control device 83 are used for the left and right eyes. The polarization angle of the image is 9
0 ° different. A viewer can separate the images of the left and right eyes and obtain a stereoscopic image by viewing the image with polarizing glasses 15 corresponding to the left and right eyes and having mutually different polarization angles of 90 °.

However, in the above method, since the liquid crystal shutter is normally switched for each field (every 1/60 seconds), crosstalk between images of two systems is likely to occur, and flicker occurs.

[0012]

As described above, each of the above-mentioned two systems has a problem, and in consideration of compatibility with the current 2D television, there are many parts that are wasted and not practical.

It is an object of the present invention to provide an eyeglass-type stereoscopic image display system having a relatively simple structure, no flicker, and good compatibility with existing 2D televisions.

[0014]

A first stereoscopic image display system according to the present invention comprises a light source, polarizing plates on the incident side and the outgoing side, and two systems of input having parallax information corresponding to each of the left and right eyes. An active matrix type liquid crystal panel for synthesizing and displaying image signals, an optical polarization means for changing the polarization angle of light passing through each pixel of the liquid crystal panel by 90 ° corresponding to the images of the left and right eyes, and this optical polarization A projection lens for enlarging and projecting the light that has passed through the means onto a screen, and displaying a stereoscopic image through polarizing glasses having different left and right polarization angles of 90 °, wherein the optical polarization means comprises: A twisted nematic liquid crystal panel arranged in a one-to-one correspondence with the pixels of the liquid crystal panel, wherein the polarization angle is controlled for each pixel of the liquid crystal panel.

A second stereoscopic image display system according to the present invention is a display in which pixels are arranged in a matrix for synthesizing and displaying input image signals of two systems having parallax information corresponding to each of the left and right eyes, and the front surface thereof. Polarizing glasses arranged in the above position and optical polarization means for changing the polarization angle of light passing through the polarization plate by 90 ° corresponding to the images of the left and right eyes. In a stereoscopic image display system for displaying a stereoscopic image via a display device, the optical polarization means includes a TN (twisted nematic) type liquid crystal panel arranged corresponding to the pixels of the display, and the optical polarization means polarizes each pixel of the display. It is characterized by controlling the corners.

[0016]

In the TN type liquid crystal panel, the polarization angle of light passing therethrough differs by 90 ° when a voltage is applied and when no voltage is applied. Therefore, by controlling the voltage application to the liquid crystal element corresponding to each pixel of the TN type liquid crystal panel arranged corresponding to the pixel of the liquid crystal panel or the display, the polarization of the light passing through each pixel of the liquid crystal panel or the display is controlled. The angle can be controlled arbitrarily, and the polarization angles of the light that has passed through the pixels displaying the input left and right eye images can be different from each other by 90 ° corresponding to the left and right eye images. As a result, the viewer can obtain a stereoscopic image by wearing polarized glasses whose right and left polarization angles are different by 90 °.

Further, when no voltage is applied to the TN type liquid crystal panel, the polarization angles of the images corresponding to the left and right eyes are equal, and a normal 2D image can be viewed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a system configuration diagram showing a first embodiment of the present invention. The embodiment shown in FIG. 1 shows a configuration example of a liquid crystal projection type stereoscopic image display device using polarized glasses, in which an AM (active matrix) type liquid crystal panel is used as a transmission type liquid crystal panel, and light incident on the panel is used. It is an example of making parallel light by a parallel light producing device.

As shown in FIG. 1, the light from the projection light source 11 is converted into parallel light by the parallel light producing device 12, and blue light, for example, of this light is reflected by the blue reflection dichroic mirror 16 and the incident side polarization plate 4 is reflected. AM type liquid crystal panel 1 for blue via
Is incident on.

Of the light transmitted through the blue reflection dichroic mirror 16, green light is green reflection dichroic mirror 17.
And is incident on the AM type liquid crystal panel 2 for green through the incident side polarization plate 5. Further, the light passing through the green reflection dichroic mirror 17 is reflected by the red reflection dichroic mirror 18 and is incident on the red AM liquid crystal panel 3 via the incident side polarization plate 6.

The transmitted light from the blue liquid crystal panel 1 is reflected by the blue reflection dichroic mirror 19 from the emission side polarization plate 7 having a polarization angle of 90 ° different from that of the incident side polarization plate 4, and then the green reflection dichroic mirror 20, It passes through the red reflection dichroic mirror 21. The transmitted light from the liquid crystal panel 2 for green is reflected by the green reflection dichroic mirror 20 from the emission side polarization plate 8 having a polarization angle different from that of the incident side polarization plate 5 by 90 °, and passes through the red reflection dichroic mirror 21. Further, the transmitted light from the red liquid crystal panel 3 is reflected by the red reflection dichroic mirror 21 via the emission side polarization plate 9 having a polarization angle different from that of the incidence side polarization plate 9 by 90 °. Then, the transmitted light of the blue liquid crystal panel 1 that has passed through the green reflective dichroic mirror 20 and the red reflective dichroic mirror 21, the transmitted light of the green liquid crystal panel 2 that has passed through the red reflective dichroic mirror 21, and the red liquid crystal panel 3 are transmitted. The transmitted light is combined and given to the TN type liquid crystal panel 10. That is, in this projection type liquid crystal stereoscopic display device, the light from the light source 11 for projection is made into parallel light by the parallel light creating device 12, and this light is separated into the three primary colors of R, G, B by the dichroic mirrors 16, 17, 18. After that, the light is made incident on the AM type liquid crystal panels 1, 2 and 3 in which the incident side polarization plates 4, 5 and 6 and the emission side polarization plates 7, 8 and 9 whose polarization angles differ from each other by 90 ° are arranged.

The AM type liquid crystal panels 1, 2 and 3 are configured to display a two-system input image every other vertical column pixels or every other horizontal row. In the illustrated embodiment, the input image of two systems is displayed every other column. A method of controlling the AM type liquid crystal panels 1, 2 and 3 will be described later.

The light incident on each pixel of the AM type liquid crystal panels 1, 2 and 3 is an input image of two systems having parallax information corresponding to each of the left and right eyes of the viewer, every other vertical column pixel or every one horizontal pixel. After being modulated so as to display every other time, they are recombined by the dichroic mirrors 19, 20, 21 and are incident on the pixels of the TN type liquid crystal panel 10 in a one-to-one correspondence. The TN type liquid crystal panel 10 is controlled so that the light incident corresponding to each pixel is polarized by 90 ° with respect to the images of the left and right eyes with the polarization angle thereof. The control method of this TN type liquid crystal panel will be described later.

The light passing through each pixel of the TN type liquid crystal panel 10 has a polarization angle every one column or every one row pixel corresponding to the images of the left and right eyes. It is changed by 90 °, and enlarged and projected on the screen 14 by the projection lens 13. A viewer can obtain a stereoscopic image by wearing the polarizing glasses 15 whose left and right polarization angles are different by 90 °.

When viewing 2D images, if no voltage is applied to the TN type liquid crystal panel 10, the polarization angles of the images corresponding to the left and right eyes are the same, and normal 2D images can be viewed. it can.

A control example for displaying every one column pixel or every one row pixel on the AM type liquid crystal panel 1 (2, 3) described above will be described with reference to FIGS. 4 and 5.

FIG. 4 is a block diagram showing a case where input images of two systems are displayed on the AM type liquid crystal panel 1 (2, 3) every other vertical column pixel. As shown in FIG. 4, after the left eye image signal captured by the left eye television camera 58 is processed by the image processing circuit 60, the data driver on the odd pixel column side of the AM type liquid crystal panel 1 (2, 3) Send to 63. The right-eye image signal captured by the right-eye television camera 59 is also processed by the image processing circuit 61, and then the AM type liquid crystal panel 1 is processed.
It is sent to the data driver 64 on the even pixel column side of (2, 3).

Then, horizontal scanning lines are scanned in the scanning circuit 65, the left eye image signal is given from the data driver 63 to the odd pixel columns, and the right eye pixel signal is given from the data driver 64 to the even pixel columns. AM type liquid crystal panel 1 (2,
3) Two lines of input images are displayed on every other vertical column pixel.

FIG. 5 is a block diagram showing a case where two input image systems are displayed on the AM type liquid crystal panel 1 (2, 3) every other horizontal pixel. As shown in FIG. 5, the image processing circuit 6 outputs the image signal for the left eye captured by the television camera 58 for the left eye.
It is processed at 0 and given to the time division switching device 62. Furthermore,
The time-division switching device 62 is supplied with the image signal for the right eye captured by the television camera 59 processed by the image processing circuit 61. The time-division switching device 62 switches the signal for the left eye and the signal for the right eye for each horizontal scanning line in synchronization with the output from the scanning circuit 65 to switch the data driver 63 for the odd pixel column side and the data for the even pixel column side. The image is supplied to the driver 64 and the input image of two systems is displayed on the AM type liquid crystal panel 1 (2, 3) every other horizontal pixel.

Next, an example of optical means for making the light passing through each pixel of the AM type liquid crystal panel 1 (2, 3) incident on the pixels of the TN type liquid crystal panel 10 in a one-to-one correspondence is shown in FIG. 8 to FIG.

In the structure shown in FIG. 6, collimated light is made incident on the AM type liquid crystal panels 1 (2, 3) from the incident side polarization plates 4 (5, 6), and the AM type liquid crystal panels 1 (2, 3) are respectively made. Of the light that has passed through the pixels of TN through the polarizing plate 7 (8, 9) on the output side
To liquid crystal panel 10 (22, 23, 24) pixels 1: 1
It is configured to be incident corresponding to.

FIG. 7 shows an AM type liquid crystal panel 1.
The imaging lens 35 is provided on the optical path from (2, 3) to the TN type liquid crystal panel 10, and the AM type liquid crystal panel 1 (2, 3) is provided.
The light that has passed through each pixel of the output side polarization plate 7 (8,
9) from the TN liquid crystal panel 1 via the imaging lens 35.
It is configured so that the light is incident on the 0 pixel at a ratio of 1: 1.

FIG. 8 shows an AM type liquid crystal panel 1.
A flat plate microlens array 36 is provided on the optical path from (2, 3) to the TN type liquid crystal panel 10, and the light passing through each pixel is made incident in a one-to-one correspondence.

Next, an example of control of the TN type liquid crystal panel 10 for making the polarization angles of the projection light different from each other by 90 ° corresponding to the images of the left and right eyes will be described with reference to FIGS. 9 and 10.

FIG. 9 shows an example in which a TN type liquid crystal panel is driven by an active matrix type and its polarization angle is controlled every other column, and FIG. 9A is a circuit showing a schematic configuration of the active matrix display panel. FIG. 1B is a diagram showing the applied voltage state of each bus line.

The active matrix circuit temporarily turns on all the transistors 57 of the scanning bus line 53 in a line-sequential manner, and supplies charges to the liquid crystal capacitor 55 via the data side bus line 54 from the data driver circuit 52. Due to the electric charge stored in the liquid crystal capacitor 55, each pixel portion maintains its state until the next frame is scanned. still,
In the figure, 51 is a scanning circuit, and 56 is a common electrode.

Using this active matrix circuit,
As shown in (b) of the figure, by controlling the voltage applied to each field period / scan bus line 53 and data bus line 54, the voltage application state is changed every other column pixel, and the polarization angle is changed. Control. In the figure, VG (i) is the voltage applied to the first scanning bus line 53, VG (i + 1)
Is the voltage applied to the scan bus line 53 of the i + 1th row, V
S (j) is the voltage applied to the jth column data bus line 54,
VS (j + 1) is the voltage applied to the data bus line 54 in the j + 1th column, and Vc is the potential of the common power source applied to the counter electrode.

FIG. 10 shows an example in which the TN type liquid crystal panel 10 is driven by a simple matrix type and the polarization angle thereof is controlled every other column pixel. FIG. 10A is a circuit diagram showing a schematic configuration of a simple matrix display panel, and FIG. 10B is a diagram showing applied voltage states of each bus line. The simple matrix system has a structure in which the transparent conductive film for display is used as the X and Y electrodes and the liquid crystal material is sandwiched, and the voltage applied to each bus line 53, 54 is controlled in one column by controlling as shown in FIG. The polarization angle is controlled by changing the voltage application state for each pixel. In the figure, VG (i) is the voltage applied to the scanning bus line 53 in the first row, and VG (i + 1) is the scanning bus line 5 in the i + 1 row.
3, VS (j) is a voltage applied to the jth column data bus line 54, and VS (j + 1) is a voltage applied to the j + 1th column data bus line 54.

FIG. 2 is a system configuration diagram showing a second embodiment of the present invention. In the embodiment shown in FIG. 2, in the embodiment shown in FIG. 1, after the light is combined by the dichroic mirrors 19, 20, 21 and then the polarization angle is controlled by the TN type liquid crystal panel 10, the light is combined. It was previously configured to control the polarization angle.

The same components as those of the first embodiment described above are designated by the same reference numerals, and the description thereof will be omitted to avoid duplication of description. In the second embodiment, the AM type liquid crystal panels 1, 2 and 3 are provided with a TN so as to correspond to the pixels on a one-to-one basis.
Type liquid crystal panels 22, 23, 24 are arranged respectively, and the polarization angle of the light passing through each pixel is changed by 90 ° for every one column pixel corresponding to the image of the left and right angle eyes, and then the dichroic mirrors 19, 20, 21 are arranged. After combining with, lens 13
The image is enlarged and projected on the screen 14 via.

That is, each TN type liquid crystal panel 2
The light passing through the pixels of 2, 23, and 24 corresponds to the images of the left and right eyes, and in this embodiment, the polarization angle is changed by 90 ° every other column pixel, and the projection lens 13 causes the light on the screen 14 to change. Is enlarged and projected. A viewer can obtain a stereoscopic image by wearing the polarizing glasses 15 whose left and right polarization angles are different by 90 °.

When viewing 2D images, if no voltage is applied to the TN type liquid crystal panels 22, 23 and 24, the polarization angles of the images corresponding to the left and right eyes become equal and a normal 2D image is displayed. You can see it.

FIG. 3 is a system configuration diagram showing a third embodiment of the present invention. The embodiment shown in FIG. 3 is configured so that pixels from the AM type liquid crystal panels 1, 2 and 3 are incident on the TN type liquid crystal panel 10 in a one-to-one correspondence by using an imaging lens 29. Is. As shown in FIG.
Of the light from the projection light source 11, for example, blue light is reflected by the blue reflection dichroic mirror 45 and the total reflection mirror 47, and enters the blue AM type liquid crystal panel 1 via the condenser lens 25 and the incident side polarization plate 4. It

Further, of the transmitted light of the blue reflection dichroic mirror 45, the green light is reflected by the first green reflection dichroic mirror 46, and passes through the condenser lens 26 and the incident side polarization plate 5 for the AM type liquid crystal panel for green. It is incident on 2. Further, the light passing through the green reflection dichroic mirror 46 is directly incident on the red AM liquid crystal panel 3 via the condenser lens 27 and the incident side polarization plate 6.

From the blue liquid crystal panel 1 to the exit side polarization plate 7
The light transmitted through the second green reflection dichroic mirror 48 passes through the second green reflection dichroic mirror 48, and the light transmitted through the emission side polarization plate 8 from the green liquid crystal panel 2 is reflected by the second green reflection dichroic mirror. After that, the light passes through the second red reflection dichroic mirror 50, and the respective transmitted light is combined with the transmitted light of the red liquid crystal panel 3 reflected by the total reflection mirror 49 and the red reflection dichroic mirror 50. Thus, A
In the M type liquid crystal panels 1, 2 and 3, the light incident on each pixel has parallax information corresponding to the left and right eyes of the viewer.
The input image of the system is modulated so as to be displayed every other vertical column pixel, and then color combination is performed, and TN is performed by the coupling lens 29.
An image is formed on the pixels of the liquid crystal panel 10 in a one-to-one correspondence, and the light is incident on the corresponding pixels of the liquid crystal panel 10 of the TN type through the condenser lens 28. The light passing through each pixel has its polarization angle changed by 90 ° every other column pixel corresponding to the image of each of the left and right eyes, and then is enlarged and projected on the screen by the projection lens 30. Then, the viewer can obtain a stereoscopic image by wearing the polarizing glasses 15 whose left and right polarization angles are different by 90 °.

When viewing 2D images, if no voltage is applied to the TN type liquid crystal panels 22, 23 and 24, the polarization angles of the images corresponding to the left and right eyes become equal and a normal 2D image is displayed. You can see it.

FIG. 11 is a system configuration diagram showing a fourth embodiment of the present invention. In the embodiment shown in FIG. 4, the polarization angle is arbitrarily controlled for each pixel of the flat panel display.

The video signal of the left-eye image captured by the left-eye TV camera 58 and the video signal of the right-eye image captured by the right-eye TV camera 59 are provided to the image synthesizing device 66. The image synthesizing device 66 forms a video signal suitable for driving the XY address type flat panel display 67, and is switched for each column pixel and each row pixel and supplied to the flat panel display 67. This flat panel display 67 is the first
Controlled by the control signals necessary for operating the flat panel display 67 created by the control device 69,
The video signal supplied from the image synthesizing device 66 is switched and displayed for each column pixel and each row pixel. In this embodiment, the video signals of the right-eye and left-eye television cameras 58 and 59 are switched from each pixel from the flat panel display 67 to each column pixel and each row pixel so as to be emitted in a mosaic pattern. It

The light emitted from each pixel is linearly polarized by a polarizing plate 68 arranged in front of the pixel, and a TN type liquid crystal panel 70 is provided.
Is incident on. The TN type liquid crystal panel 70 is controlled by the second control device 71, and the incident light corresponding to each pixel has a polarization angle corresponding to the image of each of the left and right eyes.
Emitted with different 0 °.

A viewer can separate the images of the left and right eyes by viewing the images with polarizing glasses 15 corresponding to the left and right eyes and having polarization angles different from each other by 90 ° to obtain a stereoscopic image.

When viewing 2D images, if no voltage is applied to the TN type liquid crystal panel 70, the polarization angles of the images corresponding to the left and right eyes are the same and a normal 2D image can be viewed. it can.

FIG. 12 is a system configuration diagram showing a fifth embodiment of the present invention. In the embodiment shown in FIG. 5, the polarization angle is arbitrarily controlled for each horizontal pixel of the flat panel display.

The same components as those in the fourth embodiment described above are designated by the same reference numerals, and the description thereof will be omitted to avoid duplication of description. In the fifth embodiment, in order to control the polarization angle for each horizontal pixel of the flat panel display 67, the image synthesizing device 66 switches the video signal for the right eye image and the left eye image for each horizontal pixel, It is given to the flat panel display 67. In this embodiment, the video signals of the right-eye and left-eye television cameras 58 and 59 are switched from the flat panel display 67 to the horizontal pixels based on the control signal generated by the first control device 69. Is emitted.

Then, the light emitted from each pixel is linearly polarized by the polarizing plate 68 arranged on the front surface thereof and is incident on the TN type liquid crystal panel 70. This TN type liquid crystal panel 70 is
The light, which is controlled by the second controller 71 and is incident corresponding to each pixel, is emitted with the polarization angles thereof being different from each other by 90 ° corresponding to the images of the left and right eyes.

By viewing the image with the pair of polarizing glasses 15 corresponding to the left and right eyes and having polarization angles different from each other by 90 °, the viewer can separate the images of the left and right eyes to obtain a stereoscopic image.

When watching 2D, the fourth
If no voltage is applied to the TN type liquid crystal panel 70 as in the above embodiment, the polarization angles of the images corresponding to the left and right eyes become equal and a normal 2D image can be viewed.

FIG. 13 is a system configuration diagram showing a sixth embodiment of the present invention. In the embodiment shown in FIG. 13, the polarization angle is arbitrarily controlled for each column pixel of the flat panel display.

The same components as those in the fourth embodiment described above are designated by the same reference numerals, and the description thereof will be omitted to avoid duplication of description. In the sixth embodiment, the polarization angle is controlled for each column pixel of the flat panel display 67. That is, the left-eye image taken by the left-eye television camera 58 is given to the left-eye image processing device 72, and the right-eye image taken by the right-eye television camera 59 is given to the left-eye image processing device 73. To be This left-eye and right-eye image processing device 72,
Reference numeral 73 is a flat panel display for forming a video signal suitable for driving the XY address type flat panel display 67, so that the image for the left eye and the image for the right eye are alternately displayed for each column pixel. A signal is given to each driver of 67. This flat panel display 6
7 is controlled by a control signal necessary for operating the flat panel display 67 created by the first control device 69, and a video signal provided from the left and right eye image processing devices 72 and 73 is flat panel. Display 67
From right to left for left and right eye TV cameras 58, 59
Image signals are alternately emitted.

Then, the light emitted from each pixel is linearly polarized by the polarizing plate 68 arranged on the front surface thereof and is incident on the TN type liquid crystal panel 70. This TN type liquid crystal panel 17 is
The light, which is controlled by the second control device 71 and is incident on each pixel, is emitted with the polarization angles thereof being different from each other by 90 ° for each column corresponding to the images of the left and right eyes.

The viewer can view the image by wearing the polarizing glasses 15 corresponding to the left and right eyes and having polarization angles different from each other by 90 ° to separate the images of the left and right eyes and obtain a stereoscopic image.

Also in this embodiment, when 2D is viewed, the TN type liquid crystal panel 1 is used as in the fourth embodiment.
If no voltage is applied to 7, the polarization angles of the images corresponding to the left and right eyes are equal, and a normal 2D image can be viewed.

In the embodiment shown in FIGS. 11 to 13, the flat panel display 67, the polarizing plate 68 and the TN type liquid crystal panel 70 are arranged so as to be separated from each other for drawing. It is more desirable to place them in close contact with each other in terms of space and the like.

[0063]

As described above, the present invention has a relatively simple structure in which one system of liquid crystal projection type display device or one display is used. It is possible to configure an eyeglass-type stereoscopic image display system that does not occur, and to view a normal 2D image in a state where no voltage is applied to the TN type liquid crystal panel.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a system configuration of a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a system configuration of a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing a system configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram showing an example of an image control circuit of an AM type liquid crystal panel used in the present invention.

FIG. 5 is a block diagram showing another example of the image control circuit of the AM type liquid crystal panel used in the present invention.

FIG. 6 is a schematic view showing an example of an optical unit that causes light to enter the AM type liquid crystal panel and the TN type liquid crystal panel of the present invention in a one-to-one correspondence.

FIG. 7 is a schematic diagram showing another example of an optical unit that allows light to be incident on the TN type liquid crystal panel from the AM type liquid crystal panel of the present invention in a one-to-one correspondence.

FIG. 8 is a schematic view showing still another example of an optical unit that allows light to enter the TN type liquid crystal panel from the AM type liquid crystal panel in a one-to-one correspondence according to the present invention.

9A and 9B show an example of a TN type liquid crystal panel used in the present invention, FIG. 9A is a circuit diagram showing a schematic configuration of an active matrix display panel, and FIG. 9B is a diagram showing an applied voltage state of each bus line. .

10A and 10B show another example of a TN type liquid crystal panel used in the present invention, FIG. 10A is a circuit diagram showing a schematic configuration of a simple matrix display panel, and FIG. 10B is a diagram showing an applied voltage state of each bus line. Is.

FIG. 11 is a schematic diagram showing a system configuration of a fourth embodiment of the present invention.

FIG. 12 is a schematic diagram showing a system configuration of a fifth embodiment of the present invention.

FIG. 13 is a schematic diagram showing a system configuration of a sixth embodiment of the present invention.

FIG. 14 is a schematic diagram showing a system configuration of a conventional polarization type stereoscopic image display system.

FIG. 16 is a schematic diagram showing a system configuration of a conventional time division type stereoscopic image display system.

[Explanation of symbols]

 1,2,3 AM type liquid crystal panel 10,22,23,24,70 TN type liquid crystal panel 11 Projection light source 15 Polarizing glasses 58 Left eye TV camera 59 Right eye TV camera 66 Image synthesizer 67 Flat panel display 68 Polarizer

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[Procedure amendment]

[Submission date] November 19, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a system configuration of a first embodiment of the present invention.

FIG. 2 is a schematic diagram showing a system configuration of a second embodiment of the present invention.

FIG. 3 is a schematic diagram showing a system configuration of a third embodiment of the present invention.

FIG. 4 is a block diagram showing an example of an image control circuit of an AM type liquid crystal panel used in the present invention.

FIG. 5 is a block diagram showing another example of the image control circuit of the AM type liquid crystal panel used in the present invention.

FIG. 6 is a schematic view showing an example of an optical unit that causes light to enter the AM type liquid crystal panel and the TN type liquid crystal panel of the present invention in a one-to-one correspondence.

FIG. 7 is a schematic diagram showing another example of an optical unit that allows light to be incident on the TN type liquid crystal panel from the AM type liquid crystal panel of the present invention in a one-to-one correspondence.

FIG. 8 is a schematic view showing still another example of an optical unit that allows light to enter the TN type liquid crystal panel from the AM type liquid crystal panel in a one-to-one correspondence according to the present invention.

9A and 9B show an example of a TN type liquid crystal panel used in the present invention, FIG. 9A is a circuit diagram showing a schematic configuration of an active matrix display panel, and FIG. 9B is a diagram showing an applied voltage state of each bus line. .

10A and 10B show another example of a TN type liquid crystal panel used in the present invention, FIG. 10A is a circuit diagram showing a schematic configuration of a simple matrix display panel, and FIG. 10B is a diagram showing an applied voltage state of each bus line. Is.

FIG. 11 is a schematic diagram showing a system configuration of a fourth embodiment of the present invention.

FIG. 12 is a schematic diagram showing a system configuration of a fifth embodiment of the present invention.

FIG. 13 is a schematic diagram showing a system configuration of a sixth embodiment of the present invention.

FIG. 14 is a schematic diagram showing a system configuration of a conventional polarization type stereoscopic image display system.

FIG. 15 is a schematic diagram showing a system configuration of a stereoscopic image display device using a conventional liquid crystal projection type device.

FIG. 16 is a schematic diagram showing a system configuration of a conventional time division type stereoscopic image display system.

[Explanation of reference signs] 1,2,3 AM type liquid crystal panel 10, 22, 23, 24, 70 TN type liquid crystal panel 11 Projection light source 15 Polarizing glasses 58 Left eye television camera 59 Right eye television camera 66 Image combining device 67 Flat panel display 68 Polarizing plate

Claims (2)

[Claims] 1. An active matrix type liquid crystal panel for arranging a light source, polarizing plates on the incident side and the emitting side, and synthesizing and displaying input image signals of two systems having parallax information corresponding to each of the left and right eyes, and this liquid crystal. An optical polarization means for changing the polarization angle of the light passing through each pixel of the panel by 90 ° corresponding to the images of the left and right eyes, and a projection lens for enlarging and projecting the light passing through the optical polarization means on the screen, And a stereoscopic image display system for displaying a stereoscopic image through polarizing glasses whose left and right polarization angles are different by 90 °, wherein the optical polarization means comprises:
A stereoscopic image display system comprising a twisted nematic liquid crystal panel arranged in a one-to-one correspondence with the pixels of the liquid crystal panel, wherein a polarization angle is controlled for each pixel of the liquid crystal panel. 2. A display in which pixels are arranged in a matrix for synthesizing and displaying two input image signals having parallax information corresponding to each of the left and right eyes, a polarizing plate arranged in front of the display, and the polarized light. A stereoscopic image for displaying a stereoscopic image through polarizing glasses having an optical polarization means for changing the polarization angle of light passing through the plate by 90 ° corresponding to the images of the left and right eyes, and the left and right polarization angles being different by 90 °. In the display system, the optical polarization means is a twisted nematic liquid crystal panel arranged corresponding to the pixels of the display, and a polarization angle is controlled for each pixel of the display. .