JPH09258159A - Projection type liquid crystal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to thin a part in one direction of a projection type optical system by differentiating the aspect ratio of effective display area size of a liquid crystal light valve from the aspect ratio of an enlarged projection image formed on a screen. SOLUTION: Projection light outgoing from a cylindrical projection light source 101 arrives at the liquid crystal light valve 103 directly or reflected by a cylindrical reflector 102 matched with the shape of the projection light source 101 to transmit it. At this time, optical modulation by a video signal is applied, and the projection light becomes a projection image to be enlarged and projected on the screen 105 through a projection lens group 104. By constituting the projection lens groups 104 of an aspherical cylindrical lens for the enlargement of the projection image, the projection image projected on the screen 105 enlarged more remarkably in a magnification rate in the Y direction than the magnification rate in the X direction. In such a case, the aspect ratio magnified and projected on the screen 105 is obtained as a regular aspect ratio such as 3:4 of NTSC and 9:16 of high vision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical system configuration of a projection type liquid crystal display device and a mechanism of a portable folding type display device using the optical system.

[0002]

2. Description of the Related Art As a conventional projection type liquid crystal display device, a single plate light valve type optical system represented by Japanese Patent Publication No. 6-8986 shown in FIG. 6 and an enlarged projection optical system using a plurality of light valves are proposed. Has been done.

A conventional single plate light valve type optical system is
In FIG. 6, the light emitted from the lamp 201 is the concave mirror 2
After being reflected by 02 and condensed through the condenser lens 203, infrared rays are cut by the heat ray absorbing glass 204, and the field lens 205 further enhances the condensing property, and the incident side polarization plate 206, the liquid crystal cell 207,
It is an object which is subjected to light modulation through a liquid crystal light valve composed of an exit side polarizing plate 208 and is enlarged and projected by a projection lens 209.

Further, Japanese Patent Publication No. 6-8986 discloses application development to a three-plate light valve system, but in any case, the method of enlarging the projection optical system is equal to the vertical and horizontal directions of the light valve. Was supposed to be.

[0005]

However, the conventional technique has some problems.

First, in a conventional magnifying optical system of equal aspect ratio, the aspect ratio is 3: 4 for NTSC and 9: 1 for high definition.
In order to project a display screen having a standard aspect ratio of 6, the actual size of the liquid crystal light valve in the projection optical system also needs to be the same as the aspect ratio of the projected image.

Secondly, in the constitutional requirements of the liquid crystal light valve, particularly when constructing a color-compatible light valve, the number of pixels in the horizontal direction is combined with the resolution to multiply the three primary colors, and further, It is necessary to configure the display according to the aspect ratio of the screen, which results in a very high density compared with the pixel density in the vertical direction, leading to a reduction in the aperture ratio of the liquid crystal light valve and a reduction in the yield.

Thirdly, the projection lens group is required to have a height in the vertical direction that matches the width of the liquid crystal light valve, and a lens diameter corresponding to the width of the liquid crystal light valve is required. It was difficult to thin only.

Fourthly, since the projection light source is required to have parallelism, it is desirable to use the light emitting portion of the light source as a point light source, and in most cases the reflector is also round so as to improve the light collecting performance. , Was an obstacle when trying to construct a thin projection optical system.

Fifth, when an attempt is made to realize a portable foldable display device by using these projection optical systems, the projection light source, the liquid crystal light valve, and the projection lens group cannot be thinned, and the size of the pocket is reduced. An ultra-thin projection type liquid crystal display device could not be realized.

In view of the above points, the first object of the present invention is to realize a magnifying projection optical system in which a liquid crystal light valve having a physical size different from the aspect ratio of a projected image can be used. Second, by preventing the pixel density from being increased in only one direction of the liquid crystal light valve, the pixel aperture ratio of the liquid crystal light valve is increased and the yield is improved. Thirdly, the projection light source and the liquid crystal are Fourthly, the thickness of the projection optical system is reduced by reducing the thickness of the light valve and the projection lens group in one direction, and fourthly, an ultra-thin projection liquid crystal display device having a pocket size is realized.

There is a thing.

[0013]

In order to solve the above-mentioned problems, the projection type liquid crystal display device of the present invention has at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and the cylindrical projection light source. A liquid crystal light valve in which pixels are arranged in a vertical and horizontal matrix structure for optically modulating projection light emitted from a light source, and projection for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve. A device equipped with a projection optical system consisting of a lens group and a screen for forming an enlarged projection image emitted from the projection lens group, wherein the aspect ratio of the effective display area size of the liquid crystal light valve in the previous period, By making the aspect ratio of the enlarged projection image formed on the screen different from that of the enlarged projection image, the aspect ratio of the projection image with one side extremely lengthened despite the thin projection optical system configuration. Even if a liquid crystal light valve with a physical size different from the ratio is used in the projection optical system, the enlarged projection image can be projected with a size in which the aspect ratio of the screen to be originally reproduced is secured. It is possible to solve the first, second and third problems at the same time.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group A device equipped with a projection optical system consisting of
The projection lens group is composed of an aspherical cylindrical lens, and the magnified projection image formed on the screen has a long magnifying power in the short side direction of the effective display area of the liquid crystal light valve. Even if a liquid crystal light valve with a physical size different from the aspect ratio of the projected image with one side extremely lengthened is used in the projection optical system due to the fact that it is larger than the magnification rate, despite the thin projection optical system configuration,
Since the enlarged projection image can be projected in a size in which the aspect ratio of the screen to be originally reproduced is secured, the above-mentioned first, second, and third problems can be solved at the same time.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group And a display device having a folding mechanism, which is equipped with a projection optical system consisting of, and wherein at least the folding mechanism is a hinge-type movable coupling portion so that the two external casings can be opened and closed vertically or horizontally. The two external housings are connected to each other, and the two external housings are arranged such that the projection optical system, the screen, and a control circuit of the liquid crystal light valve when folded, It has a structure to be sandwiched and housed inside, and when the display device is used, the components of the two outer casings and the screen are set so as to form a substantially rectangular three-sided surface having a substantially triangular columnar shape. A light-shielding wall for preventing stray light from entering the display device from a substantially triangular opening surface other than the three surfaces of the substantially rectangular columnar outer shape formed by the components of the two outer casings and the screen. By including the hinge type coupling part in the two outer casings, and by disposing the cylindrical projection light source in the vicinity of the rotation center axis of the hinge type coupling part.
It is possible to reduce the thickness of the entire device.
It is possible to realize a pocket-sized, ultra-thin projection-type liquid crystal display device, which was a problem of.

Further, in the configuration of the projection type liquid crystal display device according to claim 3, the screen and the light shielding wall are cloth-shaped, and the two external parts which are closed when the display device is unused and folded. By being folded and housed between the components of the housing, it is possible to make the entire device thin, and the pocket-sized ultra-thin projection liquid crystal display device that was the fourth problem described above. In addition to realizing the above, it also enables the weight reduction of the projection type liquid crystal display device.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group A device equipped with a projection optical system consisting of
The projection lens group is composed of a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the side direction in which the effective display area size of the liquid crystal light valve is short, and the liquid crystal light valve. In the direction of the long side of the effective display area size, the enlargement ratio is set to 1 and the image is not enlarged, so that the size of one side is the same as one side of the enlarged projection image despite the thin projection optical system configuration. Even if a liquid crystal light valve with a large physical ratio with a large aspect ratio is used in the projection optical system, the enlarged projection image can be projected with a size in which the aspect ratio of the screen to be originally reproduced is secured. It is possible to solve the first, second and third problems of the above simultaneously.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and A folding projection machine is equipped with a flat projection optical system that does not expand in the direction of the side where the effective display area of the liquid crystal light valve is long, with a magnification of 1. In the display device having the above, the folding mechanism has a structure in which at least two external casings are connected by a hinge-type movable coupling portion so as to open and close vertically or horizontally, and the two external casings are When the display device is not folded, the projection optical system, the screen, and the control circuit of the liquid crystal light valve have a structure to be sandwiched and housed therein. The component and the screen are set so as to form three sides of a substantially rectangular columnar outline, and the two external housing components and the screen form a substantially rectangular columnar outline. In addition to providing a light shielding wall for preventing stray light from entering the display device on the substantially triangular opening surface other than the three surfaces, the hinge-shaped coupling portion is provided in the two external housings. The By the cylindrical projection light source are arranged in a rotation center axis near the junction of the hinge form, in a more compact, fourth above
It is possible to realize an ultra-thin projection-type liquid crystal display device having a pocket size, which is a problem of.

Further, in the structure of the projection type liquid crystal display device according to claim 6, the screen and the light shielding wall are cloth-shaped, and the two external parts which are closed when the display device is not folded. By being folded and housed between the components of the housing, a more compact, pocket-size, ultra-thin projection-type liquid crystal display device, which is the fourth problem described above, can be realized, and at the same time, extra projections are provided when folding. Thus, it is possible to realize a portable projection type liquid crystal display device that is light and has no weight.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and The flat projection optical system is a flat projection optical system in which the enlargement ratio is 1 and is not expanded in the direction of the long side of the effective display area of the liquid crystal light valve. By the length of the light emitting portion, wherein it is substantially the same as the length of the long side direction of the liquid crystal light valve,
Since a light source with high luminous efficiency such as a cold cathode tube, a fluorescent lamp or a discharge lamp with a wide gap can be used as a projection light source, the above first, second and third problems can be solved and at the same time, a projection type liquid crystal display. It is also possible to realize power saving of the device.

Further, at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels are arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and In the side direction where the effective display area of the liquid crystal light valve is long, the enlargement ratio is set to 1, and the liquid crystal light valve is not enlarged, and the length of the light emitting portion of the cylindrical projection light source is A display device equipped with a projection optical system having a length substantially equal to the lengthwise direction of the liquid crystal light valve and having a folding mechanism, wherein the folding mechanism has at least two external casings vertically or horizontally. A control circuit for the projection optical system, the screen, and the liquid crystal light valve has a structure in which a hinge-type movable coupling portion is connected so as to open and close, and the two external housings are used when the display device is unused and folded. And has a structure for sandwiching and containing the inside, and when the display device is used, the components of the two external casings and the screen are set so as to form three sides of a substantially rectangular columnar outer shape, Also,
Light shielding for preventing stray light from entering the display device from the outside in a substantially triangular opening surface other than the three surfaces of the substantially rectangular columnar outer shape formed by the components of the two external housings and the screen. A projection display image is provided by including a wall, and by disposing the hinge type coupling part in the two outer casings and the cylindrical projection light source near the rotation center axis of the hinge type coupling part. Since either the vertical or horizontal projection optical system can be made extremely small irrespective of the aspect ratio, the projection optical system can be made significantly thinner than the conventional vertical / horizontal magnifying optical system. Since a light source with high luminous efficiency such as a fluorescent lamp, a discharge lamp with a wide gap, or the like can be used as the projection light source, the above-mentioned first, second, third, and fourth
In addition to solving the above problem, it is possible to realize power saving of the projection type liquid crystal display device.

Further, in the configuration of the projection type liquid crystal display device according to claim 9, the screen and the light shielding wall are cloth-shaped, and the two external parts which are closed when the display device is not folded. By being folded and housed between the housing components, a more compact, pocket-size, ultra-thin projection-type liquid crystal display device, which is the fourth problem described above, can be realized, and at the same time, extra projections can be provided during folding. It is possible to realize a lightweight and portable type.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

[0024]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic configuration diagram showing an embodiment of a projection optical system in a projection type liquid crystal display device according to claim 1 of the present invention.

Here, the projection light emitted from the cylindrical projection light source 101 (cold-cathode tube, fluorescent lamp, etc.) is emitted directly or from the projection light source 1.
Cylindrical reflector 10 that matches the shape of 01
The light is reflected by 2 and reaches the liquid crystal light valve 103 to be transmitted.

At this time, light modulation is applied by the video signal, and a projected image is enlarged and projected on the screen 105 via the projection lens group 104.

For the enlargement of the projected image, the projection lens group 104 is formed by the aspherical cylindrical lens as shown in FIG. Also, since the enlargement ratio in the Y direction can be made much larger, even if the aspect ratio of the actual size of the liquid crystal light valve is 1:10, as shown in FIG. Screen 105
Aspect ratio (aspect ratio) of the projected image enlarged and projected on the screen
Is an object that can obtain a normal aspect ratio such as 3: 4 for NTSC and 9:16 for high definition.

The above-described embodiment is also a representative example in which the projection lens group 104 according to claim 2 is composed of an aspherical cylindrical lens, and the projection image on the screen 105 is a lens by the aspherical cylindrical lens. When magnified by the group 104, the magnifying power in the vertical direction can be remarkably larger than the magnifying power in the horizontal direction of the projected image, whereby the magnifying power in the Y direction can be made larger than the magnifying power in the X direction of the projected image. 2 "The enlargement projection image formed on the screen is such that the enlargement ratio in the short side direction of the effective display area of the liquid crystal light valve is larger than the enlargement ratio in the long side direction ..." Can be realized.

(Embodiment 2) FIGS. 2 and 3 are schematic configuration diagrams showing an embodiment for realizing claim 3.

This is a configuration example in which the projection optical system described in the first embodiment is mounted in a display device having a folding mechanism as described in claim 3.

Here, the outside of the casing A110 and the casing B111 has a box shape. As shown in FIG. 2, the unused folds of the display device include a projection light source 101, a reflector 102, a liquid crystal light valve 103, and a projection lens group. Control circuit 1 for projection optical system 104, screen 105, and liquid crystal light valve
13 are all inside.

Further, as shown in FIG. 3, when the display device is used, one side of the case A110 and the case B111 opens vertically (or left and right) with the hinge-shaped connecting portion as a fulcrum, and the inside is opened. The screen 105 and the display device having an approximately triangular prism shape that have been housed are assembled and formed.

At this time, the projection light source 101 forming the internal optical system is built in at the joint position of the two outer casings that are opened and closed, that is, at the position where the hinge-shaped coupling portion is located, and the opening / closing mechanism is simplified. It is possible to make the display device thinner and the display device thinner when folded.

Further, stray light from the outside enters the inside of the display device on two opening surfaces of a substantially triangular shape corresponding to the openings of the outer wall surface of the substantially triangular prism formed by the housing A110, the housing B111 and the screen 105. Then, in order not to impair the image quality such as the contrast of the projected image, the light-shielding wall 112 is configured to protrude and block the opening surface at the same time when the housing A110 and the housing B111 are opened.

Further, by forming the light shielding wall 112 and the screen 105 with a cloth-like material, as shown in FIG. 2, when folded, they are smoothly folded and stored in the case A110 and the case B11. At the same time, when used, it spreads rapidly as shown in FIG. 3 to perform the respective functions, and the weight of the display device can be reduced, so that claim 4 can be realized.

Further, the above-mentioned explanatory view shows two external housings A1.
10 and the housing B111 are configured to open and close in the vertical direction, but opening and closing in the left and right like a book properly adjusts the pixel configuration of the liquid crystal light valve 103 and the enlargement ratio (aspherical design) of the projection lens group 104. It is added that it is possible by combining with.

(Embodiment 3) FIG. 4 is a schematic diagram showing an embodiment of a projection optical system in a projection type liquid crystal display device according to claim 5 of the present invention.

Here, the projection light emitted from a cylindrical projection light source 101 (such as a cold cathode tube or a fluorescent lamp) is reflected directly or by a cylindrical reflector 102 matching the shape of the projection light source 101, and a liquid crystal light valve. It reaches 103 and penetrates.

At this time, light modulation is applied by the video signal, and a projected image is enlarged and projected on the screen 105 via the projection lens group 106 composed of cylindrical lenses.

When enlarging the projected image, the projection lens group 106 composed of cylindrical lenses is used, for example, as shown in FIG.
As shown in FIG. 4, since it is possible to enlarge only the Y direction of the projection image projected on the screen 105 by using a biconvex cylindrical convex lens and a bispherical cylindrical concave lens, as shown in FIG. Even if the aspect ratio (aspect ratio) of the actual size of the liquid crystal light valve 103 is, for example, 1:10, the aspect ratio (aspect ratio) of the projection image enlarged and projected on the screen 105 is NTSC.
Aspect ratio of 3: 4 or high definition 9:16 is obtained.

This is because the size of the liquid crystal light valve 103 is the same as the size of the projected image in the X direction, and the projection lens group 106 made up of cylindrical lenses has a magnifying power only in the vertical direction. It is because it is configured as follows.

As described above, as described in claim 5, "the enlarged projection image formed on the screen is enlarged only in the side direction (Y direction in this case) where the effective display area size of the liquid crystal light valve is short. And the long side direction of the effective display area of the liquid crystal light valve (in this case, X
Direction) means that the enlargement ratio is 1 and the enlargement is not performed ”.

(Embodiment 4) FIGS. 5 and 3 are schematic configuration diagrams showing an embodiment for realizing claims 6 and 7.

By mounting the projection optical system shown in FIG. 4 described in the third embodiment on the display device having the folding mechanism shown in FIGS. This is an example configured to realize a liquid crystal display device.

Here, the outside of the casing A110 and the casing B111 has a box shape, and the unused folds of the display device as shown in FIG. 5 are the projection light source 101, the reflector 102, the liquid crystal light valve 103, and the projection lens group. Control circuit 1 for projection optical system 106, screen 105, and liquid crystal light valve
13 are all inside.

Further, when the display device is used, as shown in FIG. 3, the housing A110 and the housing B111 have one side open vertically (or left and right) with the hinge-shaped coupling portion as a fulcrum, and the inside The screen 105 and the display device having an approximately triangular prism shape that have been housed are assembled and formed.

At this time, the projection light source 101 forming the internal optical system is built in at the joint position of the two outer casings that are opened and closed, that is, at the position where the hinge-shaped coupling portion is located, and the opening / closing mechanism is simplified. It is possible to achieve both the miniaturization and the thinning of the folding display device.

Further, stray light from the outside enters the inside of the display device on two opening surfaces of a substantially triangular shape corresponding to the openings of the outer wall surface of the substantially triangular prism formed by the housing A110, the housing B111 and the screen 105. Then, in order not to impair the image quality such as the contrast of the projected image, the light-shielding wall 112 is configured to protrude and block the opening surface at the same time when the housing A110 and the housing B111 are opened.

Further, by forming the light-shielding wall 112 and the screen 105 with a cloth-like material, as shown in FIG. 2, when folded, they are smoothly folded and housed in the case A110 and the case B11. At the same time, when used, it spreads rapidly as shown in FIG. 3 to perform the respective functions, and the weight of the display device can be reduced, so that claims 6 and 7 can be realized.

(Embodiment 5) Claims 8 and 9 are obtained by aligning the lengths in the long side direction of the projection light source and the liquid crystal light valve of the constituent elements of FIGS. 5 and 3 described in Embodiment 4 above. -Claim 10 is realized.

Although it is basically similar to the fourth embodiment, one side of a series of components from the internal projection optical system to the screen / external casing is gathered in a form close to a common size.
Since the dead space inside the display device can be reduced, the overall size of the display device can be further reduced.

In some of the embodiments described above, the projection lens group may be made of plastic, glass or the like.

Note that the light valve is not limited to the liquid crystal display.

[0055]

As described above, in the projection type display device of the present invention, one direction of the projection optical system can be made extremely thin, so that the display device can be made extremely thin.

As a result, a folding type projection liquid crystal display device which is convenient for carrying can be realized.

Further, since it is not necessary to be a point light source which has been conventionally required as a condition for a projection light source, a cylindrical elongated cold-cathode tube or a fluorescent lamp can be used as a projection light source, thus reducing power consumption and emitting light. The effect of improving efficiency can also be obtained.

Further, in a liquid crystal light valve which normally requires a pixel configuration in which one set of three primary colors of RGB is used, it is necessary to reduce the horizontal pixel pitch to one third in order to realize a square lattice structure of pixels. was there. However, since the liquid crystal light valve used in the optical system of the projection display apparatus of the present invention can change the aspect ratio of the effective display area extremely greatly,
Since it is possible to give a margin to the horizontal pixel pitch having a higher pixel density and requiring a higher resolution, it is possible to realize the colorization of the projected image and the square lattice without narrowing the pixel pitch.

Therefore, it is possible to simultaneously improve the yield of the liquid crystal light valve and increase the brightness of the display device by increasing the aperture ratio.

It has a number of advantages.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a projection optical system according to a first embodiment of the invention.

FIG. 2 is a schematic configuration diagram showing an outline of a mechanism according to a second embodiment of the present invention.

FIG. 3 is a schematic configuration diagram showing an outline of a mechanism according to a second embodiment, a fourth embodiment, and a fifth embodiment of the present invention.

FIG. 4 is a schematic configuration diagram showing a projection optical system according to Embodiments 3 and 4 of the present invention.

FIG. 5 is a schematic configuration diagram showing a projection optical system according to Examples 4 and 5 of the present invention.

FIG. 6 is a schematic configuration diagram of a projection optical system according to a conventional example.

[Explanation of symbols]

 101 Projection Light Source 102 Reflector 103 Liquid Crystal Light Valve 104 Projection Lens Group 105 Screen 110 Housing A 111 Housing B 112 Shading Wall 113 Control Circuit

Claims (10)

[Claims] 1. A pixel is arranged in at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group And an aspect ratio of the effective display area size of the liquid crystal light valve and an aspect ratio of the enlarged projection image formed on the screen are different from each other. Projection type liquid crystal display device. 2. A cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group And a projection optical system including the projection optical system, wherein the projection lens group is composed of an aspherical cylindrical lens, and the enlarged projection image formed on the screen is an effective liquid crystal light valve. A projection type liquid crystal display device characterized in that the enlargement ratio in the short side direction of the display area size is larger than that in the long side direction. 3. A cylindrical projection light source, a reflector for the cylindrical projection light source, and pixels arranged in a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group And a display device having a folding mechanism equipped with a projection optical system, wherein at least the folding mechanism is a hinge-type movable coupling portion so that the two external housings can be opened and closed vertically or horizontally. Form a linked structure,
The two outer casings have a structure in which the projection optical system, the screen, and the control circuit of the liquid crystal light valve are sandwiched and housed inside when not in use, and the two outer casings are used when the display device is used. The components of one external housing and the screen are set so as to form three surfaces of a substantially rectangular columnar outer shape, and the components of the two external housings and the screen form a substantially triangular shape. A light shielding wall for preventing the entry of stray light from the outside of the display device is provided on the opening surface of the triangular shape other than the three surfaces of the substantially rectangular shape of the columnar shape, and the hinge type coupling is provided in the two external housings. A projection type liquid crystal display device, characterized in that the cylindrical projection light source is disposed in the vicinity of a rotation center axis of the hinge part and the hinge type coupling part. 4. The projection type liquid crystal display device according to claim 3, wherein the screen and the light shielding wall are cloth-shaped, and the two external parts are closed when the display device is unused and folded. A projection type liquid crystal display device characterized by being folded and housed between components of a housing. 5. A pixel is arranged in at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group A device equipped with a projection optical system consisting of, wherein the projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is
A projection type liquid crystal display characterized in that only the short side direction of the effective display area of the liquid crystal light valve is enlarged, and the long side direction of the effective display area of the liquid crystal light valve is not enlarged with an enlargement ratio of 1. apparatus. 6. A pixel is arranged in at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and In addition, a flat projection optical system that does not enlarge the enlargement ratio of 1 in the long side direction of the effective display area of the liquid crystal light valve is provided, and a folding mechanism is provided. In the display device, the folding mechanism has a structure in which at least two external casings are connected by a hinge-type movable coupling portion so as to open and close in a vertical or horizontal direction. When the device is not used, the projection optical system, the screen, and the control circuit of the liquid crystal light valve are sandwiched and housed inside, and when the display device is used, the configuration of the two external housings is provided. The parts and the screen are set so as to form three surfaces of a substantially rectangular pillar-shaped outer shape, and the two external housing components and the screen form a substantially rectangular pillar-shaped outer surface. A light blocking wall for preventing stray light from entering the display device is provided on the substantially triangular opening surface other than the three surfaces, and the hinge-shaped coupling portion is provided in the two external housings. Projection-type liquid crystal display device, characterized in that said cylindrical projection light source to the rotation center axis near the junction of the hinge type is arranged. 7. The structure of the projection type liquid crystal display device according to claim 6, wherein the screen and the light shielding wall are cloth-shaped, and when the display device is not folded, the two external parts are closed. A projection type liquid crystal display device characterized by being folded and housed between components of a housing. 8. A pixel is arranged in at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and , A flat projection optical system that does not expand in a direction in which the effective display area of the liquid crystal light valve has a long dimension and has a magnifying power of 1, and the cylindrical projection light source emits light. A projection type liquid crystal display device, wherein the length of the part is substantially the same as the length of the liquid crystal light valve in the long side direction. 9. A pixel is arranged in at least a cylindrical projection light source, a reflector for the cylindrical projection light source, and a vertical and horizontal matrix structure for optically modulating the projection light emitted from the cylindrical projection light source. A liquid crystal light valve, a projection lens group for enlarging and projecting a projection image generated by light modulation of the projection light through the liquid crystal light valve, and a screen for forming an enlarged projection image emitted from the projection lens group The projection lens group is configured by a cylindrical lens, and the enlarged projection image formed on the screen is enlarged only in the short side direction of the effective display area size of the liquid crystal light valve, and In the direction of the long side of the effective display area of the liquid crystal light valve, the enlargement ratio is set to 1, and the liquid crystal light valve is not enlarged, and the length of the light emitting portion of the cylindrical projection light source is A display device equipped with a projection optical system having a length substantially equal to the length of the liquid crystal light valve and having a folding mechanism, wherein the folding mechanism is such that at least two external casings are opened and closed vertically or horizontally. As described above, the two external housings are connected to each other by a hinge-shaped movable coupling portion, and the projection optical system, the screen, and a control circuit of the liquid crystal light valve when the display device is unused and folded. , And has a structure for sandwiching and containing inside, and when the display device is used, the components of the two external casings and the screen are set so as to form three surfaces of a substantially rectangular outer shape of a substantially triangular prism. Stray light from the outside of the display device on a substantially triangular opening surface other than the three surfaces of the substantially rectangular columnar outer shape formed by the components of the two external casings and the screen In addition to providing a light-shielding wall for preventing entry, the hinge type coupling portion is provided in the two external housings, and the cylindrical projection light source is disposed in the vicinity of the rotation center axis of the hinge type coupling portion. A projection type liquid crystal display device characterized in that 10. The structure of the projection type liquid crystal display device according to claim 9, wherein the screen and the light shielding wall are cloth-shaped, and when the display device is not folded, the two external parts are closed. A projection type liquid crystal display device characterized by being folded and housed between housing components.