JPH06123868A - Projection type display device - Google Patents

Abstract

PURPOSE:To obtain a high definition and high quality projection-type display device having a light weight adjustment system easy for matching a pixel by providing one or plural optical shift elements different from each other on at least one side of the incident side and the outgoing side of the projection lenses of plural projection optical systems. CONSTITUTION:The figure knows the device using planar transparent substrates 81, 82 as the optical shift element for positional adjustment. Images on light valves 51, 52 are enlarged by the projection lenses 61, 62 and the enlarged images are formed on a screen 7. The planar transparent substrates 81, 82 are rotated in the direction opposite to each other around a (z) axis for axes m1, m2. Then, light beams from the light valves 51, 52 are diffracted and shifted in the direction of the arrow in the figure. That is, the centers of the light valves 51, 52 are shifted equivalently to m11, m22 respectively. At this time, the images on the light valves 51, 52 are moved in the direction opposite to the arrow respectively on the screen 7 by the image formation principle of the projection lenses 61, 62.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection type display device for displaying a large screen and a high definition image.

[0002]

2. Description of the Related Art Recently, a projection type display device for enlarging and projecting an image displayed on a light valve onto a screen by a projection optical system has been actively developed. In particular, a projection type display device (hereinafter referred to as a projector) using a transmissive active matrix type liquid crystal display panel (hereinafter referred to as TFT / LCD) as a light valve is excellent in image quality such as color reproducibility and contrast and is easy to use. It is attracting attention because it gives a powerful large screen. A liquid crystal projector capable of displaying HDTV has already been realized.

FIG. 32 is a principle diagram showing a projector according to the prior art. In FIG. 32, reference numeral 1 is a light source, 2 is a filter for cutting infrared rays and ultraviolet rays generated from the light source 1, 3 is an optical filter, 4 is a condenser lens for enhancing the converging property of the light source 1, 5 is a light valve, and 6 is The projection lens, 7 is a screen.

An image signal is input to the light valve 5 in the same manner as in a normal liquid crystal television to display an image. This light valve 5
The image displayed on the screen is projected onto the screen 7 by the projection lens 6.
Projected on top. Here, since the light valve 5 itself does not emit light, the irradiation light that is emitted from the rear light source 1 and transmitted through the light valve 5 enters the projection lens 6. As a result, the display image formed on the light valve 5 is enlarged and projected by the projection lens 6, so that a large screen display is possible.

In order to further increase the resolution with such a liquid crystal projector configuration, the number of pixels must be dramatically increased by increasing the density of the pixels of the TFT / LCD or increasing the display area. Lower resistance, TF
The manufacturing becomes difficult due to the improvement of the driving ability of T and the decrease of the manufacturing yield. In addition, it becomes difficult in terms of circuitry, such as ultra-high speed operation of the driver LSI that drives the LCD. Therefore, in order to achieve higher resolution, a projection optical system has been used in which projection images from a plurality of projectors are superimposed on each other so that the pixels are filled with each other (for example, Japanese Patent Laid-Open No. 6-58242).
4-35479).

FIG. 33 shows a specific optical system. In FIG. 33, reference numerals 11 and 12 denote light sources, and 21 and 22 denote light sources 11, 1.
Filters for cutting infrared rays and ultraviolet rays generated from 2, 31 and 32 are optical filters, 41 and 42 are condenser lenses, 51 and 52 are light valves, 61 and 62 are projection lenses, 7 is a screen, and m1 and m2 are projections. It is the optical axis of the lens (projector).

As shown in FIG. 33, the light valve 51,
The images of 52 are superimposed on the screen 7 to form one image. FIG. 34 shows how images of a plurality of light valves 51 and 52 are superimposed on such a projector.
Will be explained.

FIG. 34 shows an example of superimposing four images. In FIG. 34, images A, B, C and D are schematic views of a TFT-LCD which is a light valve. One pixel includes an opening that transmits light and a light shield. Therefore, if the four images are shifted by about half a pixel and projected so that the opening overlaps with the light shielding part of another image, high-definition projection display with twice the vertical and horizontal becomes possible.

[0009]

In order to obtain the maximum resolution by superimposing a plurality of images as described above on the screen, the openings of all the pixels of the image should be the light of the pixels of other images. It must be superposed on the shield. Therefore, not only the projection images are in focus, but the size is the same,
There should be no distortion and the direction of rotation on the screen should be the same. Therefore, it is necessary to precisely adjust the projection position of the projector with the six axes of the x axis, the y axis, the z axis, the θx axis, the θy axis, and the θz axis with respect to the optical axis of the projection lens as shown in FIG. .

Conventionally, such adjustment uses a stage using a precision machine as used in an optical experiment. Since a projector is generally heavy, weighing several kilograms or more, there is a problem in that a large, robust, and extremely heavy stage is used, and the weight becomes heavy.

Further, since the stage is large and heavy, there is a problem that a motor having a high driving capability is required when adjusting with a step motor or the like, and the apparatus becomes large in size.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a high-definition and high-quality projection display device having an adjustment system that is lightweight and that allows easy pixel alignment. To do.

The above and other objects and novel features of the present invention will become apparent from the description of this specification and the accompanying drawings.

[0014]

In order to achieve the above-mentioned object, means (1) of the present invention is a plurality of projection type displays for enlarging and projecting an image displayed on a light valve onto a screen by a projection optical system. In a projection type display device for superposing and projecting a projection image of a module on one screen, one or a plurality of different light shift elements are provided on at least one of an incident side and an emitting side of a projection lens of the projection optical system. And

The means (2) according to the present invention comprises a plurality of projection type display modules having no projection lens and a plurality of projection display modules in which light from the plurality of projection display modules is incident on one projection lens by a plurality of mirrors. In a projection type display device having means for superposing and synthesizing projection images from modules and enlarging and projecting on one screen, an optical shift element is provided between the projection display module and the mirror. .

According to a third aspect of the present invention, in the projection display device according to the first or second aspect, the test data is displayed on the light valve, the test data is detected, and the light valve is detected. Means for calculating the deviation from the predetermined position and means for optically correcting the positional deviation by the optical shift element.

[0017]

According to the above-mentioned means, the light shift element is arranged on one or both of the incident side and the emitting side of the projection lens to change the direction of the light beam, and the test data displayed on the light valve indicates that the light valve By calculating the deviation from a predetermined position and optically correcting this deviation with an optical shift element, it is easy and highly accurate to align the pixels of the images displayed on multiple light valves in the same area on the screen. Can be realized. As a result, it is possible to increase the resolution and definition of the projector without increasing the density or the area of the light valve used. further,
It is possible to improve the quality and brightness of the projected image and easily adjust it.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic configuration diagram for explaining the configuration of Embodiment 1 of a projection type display device of the present invention. In Example 1, with respect to the optical axis of the projection lens as shown in FIG. 25, the x-axis direction, that is, the horizontal direction of the screen surface, and the z-axis direction, that is, the vertical direction of the screen surface (vertical to the paper surface). (Direction) position adjustment, and uses a flat transparent substrate as an optical shift element for position adjustment. Hereinafter, in order to simplify the description, the description will be limited to the x-axis direction.

In FIG. 1, 11 and 12 are light sources, 21 and
Reference numeral 22 is a filter that blocks ultraviolet rays and infrared rays generated from the light sources 11 and 12, 31 and 32 are optical filters, 4
1, 42 are condenser lenses, 51, 52 are light valves, 6
1, 62 are projection lenses, 81, 82 are light valves 5.
It is a flat transparent substrate arranged between 1, 52 and the projection lenses 61, 62. Reference numeral 7 is a screen, and m1 and m2 are optical axes of the projection lens.

The images of the light valves 51 and 52 are shown in FIG.
An image magnified by the projection lenses 61 and 62 is formed on the screen 7 by the same principle. Flat transparent substrate 81,
Reference numeral 82 rotates in directions opposite to each other about the z axis with respect to the optical axes m1 and m2. Therefore, as shown in FIG. 1, when the flat transparent substrates 81 and 82 are arranged, the light valve 51,
The light beam from 52 is refracted and shifted in the direction of the arrow in FIG. Therefore, the centers of the light valves 51 and 52 are equivalently shifted to m11 and m22, respectively. At this time, the images of the light valves 51 and 52 move in the directions opposite to the arrows on the screen 7 due to the imaging principle of the projection lenses 61 and 62 (equivalent to convex lenses).
The moving distance of the image formed on the screen 7 is S times (projection magnification) according to the principle of image formation. Where S is m11, m
22 shift amounts.

(Embodiment 2) FIG. 2 is a schematic configuration diagram for explaining the configuration of Embodiment 2 of the projection type display device of the present invention. The second embodiment is similar to the first embodiment described above with reference to FIG.
The configuration is for position adjustment in the x-axis and z-axis directions with respect to the optical axis of the projection lens as shown in FIG. 9, and a flat plate transparent substrate is used as an optical shift element for position adjustment.
Hereinafter, in order to simplify the description, the description will be limited to the x-axis direction.

In FIG. 2, flat plate transparent substrates 81, 82
Are arranged on the entire surfaces of the projection lenses 61 and 62, respectively, and rotate in opposite directions with respect to the optical axes m1 and m2 about the z axis. The configuration is the same as that of FIG. 1 except for the flat transparent substrates 81 and 82. When the flat transparent substrates 81 and 82 are arranged as shown in FIG. 2, the light rays from the projection lenses 61 and 62 are refracted and shifted in the direction of the arrow in the figure. Therefore, the optical axes of the projection lenses 61 and 62 are equivalently shifted to m11 and m22, respectively. The optical axis shift amount at this time is S determined only by the refraction by the flat plate transparent substrates 81 and 82.

(Embodiment 3) FIG. 3 is a schematic configuration diagram for explaining the configuration of Embodiment 3 of the projection type display device of the present invention. The third embodiment is a projection type display module having no projection lens, and projection in which light from a plurality of projection type display modules is made incident on one projection lens by a plurality of mirrors to superpose and synthesize a plurality of projection images on a screen. The display device uses an optical shift element for position adjustment. In FIG. 3, in order to simplify the description, an example using four projection type display modules will be described.

In FIG. 3, 201, 202, 203,
Reference numeral 204 denotes a projection type display module in which the projection lens 6 is removed from the projection type display device described in FIG.
Reference numeral 205 denotes a quadrangular pyramid-shaped mirror whose four surfaces are total reflection mirrors, and the angle of the facing surface is 90 degrees. 206 is a projection lens. Reference numerals 80a, 80b, 80c and 80d denote light shift elements, which are arranged between the mirror 205 and the respective projection type display modules 201, 202, 203 and 204.

The operation of the light shift element will be described here with reference to FIGS. 1, 2 and 5, and will not be repeated here.

FIG. 4 is a configuration diagram for explaining the principle of superposed projection, and is a diagram of FIG. 3 viewed from the side. Mirror 20
5 is arranged at right angles to the optical axis of the projection lens 206. Since the optical axis of the projection lens 206 intersects at the apex of the mirror 205, the plane intersecting the apex of the mirror 205 and perpendicular to the paper surface is equivalent to the optical axis of the projection lens 206. Therefore, if the light valves 51, 52, 53, 54 are arranged on this surface, they are superimposed and synthesized on the screen 207.

FIG. 5 is an optical path diagram for explaining in detail the action of the flat plate transparent substrate used for the optical shift elements of the above-described first, second, third embodiments. Reference numeral 8 denotes a flat transparent substrate, which is inclined at an angle θ1 with respect to the optical axis. The thickness is d and the refractive index is n1. In the following description, a paraxial region where sin θ≈θ holds is used.

A light ray incident on the flat plate transparent substrate 8 along the optical axis waits for an incident angle of θ1 with respect to the normal 1 and is refracted by the flat plate transparent substrate 8. If the incident surface and the exit surface of the flat transparent substrate 8 are parallel, the refracted light beam is emitted in the same direction as the incident direction but shifted by S from the optical axis. The shift amount S at this time is given by the equation (1) according to the law of refraction.

S = d * θ1 * (n1-1) / n1 (1) Therefore, the flat plate transparent substrate 8 has the x-axis as shown in FIG.
If the optical axis is rotated around the z axis, the optical axis can be shifted in the two axes of xz.

(Embodiment 4) FIG. 6 is a schematic configuration diagram for explaining the configuration of Embodiment 4 of the projection type display device of the present invention. The fourth embodiment uses two wedge-shaped transparent substrates each having an inclined surface on one side of the optical shift elements of the first, second, and third embodiments, and similar to the first, second, and third embodiments. This is a configuration for position adjustment in the x-axis and z-axis directions with respect to the optical axis of the projection lens as shown in FIG. Hereinafter, in order to simplify the description, the description will be limited to the x-axis direction. The configuration of the optical system is the same as that shown in FIGS. 1, 2, and 3, and the description thereof is omitted.

In FIG. 6, reference numerals 9a and 9b denote wedge-shaped transparent substrates, which are arranged so that their slopes are parallel to each other with an air layer at a distance d interposed therebetween as shown in FIG. The angles of the slopes of the wedge-shaped transparent substrates 9a and 9b are equal to each other and are θ1. Now, it is assumed that the entrance surface of the wedge-shaped transparent substrate 9a and the exit surface of the wedge-shaped transparent substrate 9b are at right angles to the optical axis, and light rays are incident parallel to the optical axis. The light beam is incident on the slope of the wedge-shaped transparent substrate 9a at an angle θ1 with respect to the normal line 1, refracted at an angle θ2, and emitted to the air layer. The emitted light beam is incident on the wedge-shaped transparent substrate 9b and refracted again at an angle θ1 because both slopes are parallel. After all, the light beam emitted from the wedge-shaped transparent substrate 9b is emitted in parallel with the incident direction to the wedge-shaped transparent substrate 9a and shifted by S with respect to the optical axis. The shift amount S at this time is given by the equation (2) according to the law of refraction.

S = d * θ1 * (n1-1) (2) Therefore, if the distance d between the wedge-shaped transparent substrates 9a and 9b is made variable and both substrates are rotated about the y-axis, x -Z
The optical axis can be shifted with two axes.

(Fifth Embodiment) FIG. 7 is a schematic configuration diagram for explaining the configuration of a fifth embodiment of the projection type display device of the present invention. The fifth embodiment is a configuration example in which two wedge-shaped transparent substrates that can change the angle of the slope are used in the optical shift elements of the first, second, and third embodiments. Similarly to the optical axis of the projection lens as shown in FIG.
This is a configuration in which the position adjustment in the axial and z-axis directions can be continuously and arbitrarily changed. Hereinafter, in order to simplify the description, the description will be limited to the x-axis direction. The configuration of the optical system is the same as that shown in FIGS. 1, 2, and 3, and the description thereof is omitted.

The optical elements 100a and 100b have the same structure, and the optical element 100a includes a flat transparent substrate 102a,
102b and the transparent liquid 103 having the same refractive index as the flat transparent substrates 102a and 102b. The transparent liquid 103 is held between the two flat transparent substrates 102a and 102b.
It is sealed with a contractible sealant 104 having a bellows structure, for example. The optical element 100b is a flat transparent substrate 102c, 102.
d and the flat transparent substrates 102c and 102d, and the transparent liquid 103 having the same refractive index, and the transparent liquid 103 is sealed with the sealing material 104 like the optical element 100a.

As shown in FIG. 7, the optical elements 100a and 100b are arranged so that their slopes are parallel to each other across an air layer having a predetermined distance (d), and the slopes have the same angle θ1. To arrange. Flat plate transparent substrate 102a
And 102b are fixed at right angles to the optical axis.
Flat plate transparent substrates 102a and 102b and 102c and 102
Since d is connected via the sealing material 104, the flat transparent substrates can be freely operated. That is, the flat transparent substrates 102b and 102c are connected at their both ends with the connectors 105a and 105b, respectively.
In FIG. 7, the plate transparent substrate 102b is moved up and down.
The angle .theta.1 formed by the flat transparent substrate is set while maintaining the parallelism between the and 102c. The optical operation using this optical element is the same as that of the embodiment described in Embodiment 3 which is configured by using two wedge-shaped transparent substrates. That is, the light beam emitted from the optical element 100a can be emitted parallel to the incident direction to the optical element 100b and shifted by S with respect to the optical axis. The fifth embodiment shows a method of adjusting the angle θ1 with respect to the optical axis by the driver 108.

The driver 108 is composed of a connector 105, a drive arm 106, and a micrometer 107. Figure 7
When the micrometer 107 is moved in the left-right direction, the connector 105 is interlocked in the up-down direction via the drive arm 106, and the two flat plate transparent substrates 102 b, 1 connected to each other are connected.
02c changes its angle with respect to the optical axis m11 while maintaining parallelism. Therefore, the shift amount of the light ray m11 can be shifted according to the working distance of the micrometer peak. As an alternative to the micrometer, a piezoelectric element, a pulse motor or the like can be applied.

It is important to maintain the parallelism between the flat transparent substrates 102b and 102c, and the distance d between the two substrates may or may not be maintained. Further, in the fifth embodiment, the flat transparent substrates 102a, 102b, 102c, 102d and the transparent liquid 103 have the same refractive index, but they need not be exactly the same. However, if there is a large difference in the refractive index between the two, unnecessary light is reflected at the boundary surface to reduce the transmittance, and also causes deterioration of the image quality of the screen image such as ghost and color shift.

FIG. 8 shows the structure of FIG.
2 is a schematic configuration diagram showing a configuration example in which two axes in the x-axis and z-axis directions shown in FIG. In FIG. 8, the drivers 108a and 108b have the same configuration as the driver 108 of FIG. 7. If the drivers 108a and 108b are arranged on the x-axis and the z-axis, the light beam shift direction can be changed by the operation described in FIG. It can be changed independently in the X-axis and Z-axis directions. Driver 108a,
Since the individual operations of 108b are the same as those in FIG. 7, the description thereof will be omitted.

(Sixth Embodiment) FIG. 9 is a schematic configuration diagram for explaining the configuration of a sixth embodiment of the projection type display device of the present invention. Example 6 is a configuration example in which a wedge-shaped transparent substrate having one side having an inclined surface is used for the light shift elements of Examples 1, 2, and 3 described above, and the optical axis of the projection lens as shown in FIG. On the other hand, the configuration is for position adjustment in the θx axis and θz axis directions. In order to simplify the description, the description will be limited to the θx axis direction. The configuration of the optical system is as shown in FIG.
Since it is similar to FIG. 3, its description is omitted.

In FIG. 9, 10 is 9a shown in FIG.
It is a wedge-shaped transparent substrate similar to, and the surface facing the slope has a surface perpendicular to the optical axis. The angle of the slope is θ1 with respect to the facing surface. Now, it is assumed that the incident surface of the wedge-shaped transparent substrate 10 is perpendicular to the optical axis and the light rays are incident parallel to the optical axis. The light ray is incident on the slope of the wedge-shaped transparent substrate 10 at an angle θ1 with respect to the normal line 1, is refracted at an angle θ2, and is emitted to the air layer. The angle θ formed by the emitted light and the optical axis is given by the equation (3) according to the law of refraction.

[Theta] = [theta] 2- [theta] 1 = (n1-1) * [theta] 1 (3) The wedge-shaped transparent substrate 10 as described above is provided with the light valves 51 and 52 and the projection lens as shown in FIGS. 61,
When arranged between 62, the optical axes of the light valves 51 and 52 are equivalently bent by the angle θ, so that the light valves 51 and 52 are rotated about the θx axis. Similarly,
As shown in FIG. 2, the wedge-shaped transparent substrate 10 is attached to the projection lens 6
When the light is emitted from the projection lens 1, 62, the light emitted from the projection lens is bent at an angle θ by θx, so that the light valves 51, 52 are rotated about the θx axis.

By rotating the wedge-shaped transparent substrate 10 about the x-axis, the angle θ1 can be changed, and when rotating about the y-axis, the direction of the slope changes in the xz plane. The tilt of the θx axis and the θz axis of the light valve between the projectors can be adjusted.

(Embodiment 7) FIG. 10 is a schematic constitutional view for explaining the constitution of embodiment 7 of the projection type display apparatus of the present invention. Example 7 is an example of a configuration in which a wedge-shaped transparent substrate whose slant surface angle can be changed is used in the light shift elements of Examples 1, 2, and 3 described above, and the light of the projection lens as shown in FIG. This is a configuration for position adjustment in the biaxial directions of θx and θz with respect to the axis. Hereinafter, for simplification, the description will be limited to the θx axis direction.

The optical element 100 and the driver 108 have the same structure as the optical element and the driver described with reference to FIG.
Now, it is assumed that the incident surface of the flat transparent substrate (transparent glass) 102a is perpendicular to the optical axis, and the light rays are incident parallel to the optical axis. The light beam is a flat transparent substrate (transparent glass) 102.
The light enters the slope b at an angle θ1 with respect to the normal line 1, is refracted at an angle θ with respect to the optical axis, and is emitted into the air as in the case of FIG. 9 described above. The flat transparent substrate 102b is connected to the driver 108, and the angle θ of the slope can be arbitrarily changed according to the operation of the micrometer 107. If the driver 108 is provided on the x axis and the z axis, the θx axis of the light valve between the projectors,
The tilt of the θz axis can be adjusted.

(Embodiment 8) FIG. 11 is a schematic structural view for explaining the structure of Embodiment 8 of the projection type display device of the present invention. Example 8 is an example of a configuration in which three wedge-shaped transparent substrates each having one inclined surface are used for the optical shift elements of Examples 1, 2, and 3 described above, and the examples of FIGS. 6 and 9 are combined.
With respect to the optical axis of the projection lens as shown in FIG.
This is a configuration for position adjustment in the x-axis, y-axis, θx-axis, and θz-axis directions. Hereinafter, in order to simplify the description, the x-axis, θx
The description will be limited to the axial direction. The configuration of the optical system is the same as that shown in FIGS. 1, 2, and 3, and the description thereof is omitted.

In FIG. 11, 9a and 9b are the same as the wedge-shaped transparent substrate described in FIG. 6 and have the same shape, and the angle of the slope is θ1. Wedge-shaped transparent substrate 9
As shown in FIG. 6, the slopes a and 9b are arranged in parallel with each other with an air layer at a distance d therebetween. Reference numeral 10 is the same as the wedge-shaped transparent substrate described in FIG. 9, and has a sloped surface with an angle θ3, and is arranged so that the emission surface of the wedged-shaped transparent substrate 9b and the slope-opposed surface of the wedge-shaped transparent substrate 10 are adjacent to each other.

Now, suppose that the opposite surfaces of the wedge-shaped transparent substrate are arranged at right angles as shown in FIG. 11, and light rays are incident on the wedge-shaped transparent substrate 9a parallel to the optical axis. On the wedge-shaped transparent substrates 9a and 9b, the light rays are shifted by the shift amount S with respect to the incident position and emitted in the same direction as the incident direction. The light beam incident on the wedge-shaped transparent substrate 10 has an angle θ (= (n1-
1) Emitted after refracting only * θ3). Therefore, the light beam incident on the wedge-shaped transparent substrate 9a is shifted by S with respect to the incident position and is refracted by an angle θ with respect to the incident direction to be emitted from the three wedge-shaped transparent substrates 9a, 9b and 10. become. Such wedge-shaped transparent substrates 9a, 9b and 1
As shown in FIG. 1, 0 is arranged between the light valves 51 and 52 and the projection lenses 61 and 62, the distance d between the substrates 9a and 9b is made variable, and further, the substrate is rotated about the y-axis. By rotating 10 around the x axis and the y axis independently, the position of the light valve between the projectors in the x and z axis directions and the tilt of the θx and θz axes can be adjusted. Similarly, when the wedge-shaped transparent substrates 9a, 9b, 10 are arranged on the exit surfaces of the projection lenses 61, 62 as shown in FIG. 2, the exit lights of the projection lenses 61, 62 are shifted by S in the x-axis direction, and θ
Since the angle θ is bent on the x-axis, the position between the projectors in the x- and z-axis directions and the tilt of θx and θz can be adjusted by performing the above-described adjustment.

(Embodiment 9) FIG. 12 is a schematic configuration diagram for explaining the configuration of an embodiment 9 of the projection type display device of the present invention. The ninth embodiment is a configuration example in which a wedge-shaped transparent substrate whose slant surface angle can be varied and a wedge-shaped transparent substrate whose both surface angles can be varied are used in the optical shift elements of the first, second, and third embodiments. Similar to the eighth embodiment, the configuration is for position adjustment in the x-axis, y-axis, θx-axis, and θz-axis directions with respect to the optical axis of the projection lens as shown in FIG. In order to simplify the description below, the direction is limited to the x-axis and θx-axis directions. Further, the optical action is the same as the configuration described in FIG. 11, and therefore the description thereof is omitted.

In FIG. 12, reference numerals 100a and 108a respectively have the same structure as the optical element and driver explained in FIG. Reference numeral 100c denotes an optical element. The flat transparent substrate 102d of the optical element 100b is fixed at a right angle to the optical axis, while the flat transparent substrate 102d is made variable in angle with respect to the optical axis. There is. Reference numeral 108b denotes a driver for changing the angle of the flat transparent substrate 102c with respect to the optical axis, and the flat transparent substrate 102a is fixed at a right angle to the optical axis.

Micrometer 107 of driver 108a
Is operated in the left-right direction, the coupler 105a is interlocked vertically via the drive arm 106, and the two connected flat plate transparent substrates 102b and 102c change the angle with respect to the optical axis m1 while maintaining parallelism. . When the micrometer 107 of the driver 108b moves left and right, the drive arm 10
6 rotates, and the flat transparent substrate 102b changes its angle with respect to the optical axis m1.

With such a structure, if the optical axis enters the flat transparent substrate 102a at a right angle, the flat transparent substrate 102
The light beam is shifted by S with respect to the optical axis depending on the angles of b and 102c, and is further refracted by the angle θ with respect to the optical axis according to the angle of the flat transparent substrate 102d. In this way, the position of the projector in the x-axis direction and the tilt of the θx-axis can be adjusted.
If the drivers 108a and 108b are provided on the x-axis and the z-axis, the position of the projector in the x-axis and z-axis directions and the tilt of the θx-axis and the θz-axis can be adjusted.

(Examples 10 to 14) FIGS. 13 to 17 show
It is a schematic block diagram for demonstrating the structure of Examples 10-14 of the projection type display apparatus of this invention. Examples 10 to 14
Is a projection-type display device that superimposes and synthesizes a plurality of projection images on a screen using a plurality of projection-type display modules having the projection lenses as shown in FIG. 27. It is a configuration example in which different light shift elements are arranged. 13 to 17 show one projection type display module for simplification of description.

In each of the embodiments, the x axis, z of the projector
It is a configuration example for adjusting the position of the axis and the tilt of the θx axis and the θz axis. Further, in the following description, the optical action is the same as that of the optical shift element shown in FIGS.

FIG. 13 shows an example of a configuration in which the flat transparent substrate 8 of FIG. 5 is arranged on the incident side of the projection lens 6 and the wedge-shaped transparent substrate 10 of FIG. 9 is arranged on the outgoing side of the projection lens 6.

FIG. 14 shows the wedge-shaped transparent substrate 9a,
9b is a configuration example in which the incident side of the projection lens 6 is disposed and the wedge-shaped transparent substrate 10 of FIG. 9 is disposed at the emission side of the projection lens 6.

FIG. 15 shows the wedge-shaped transparent substrate 9a,
Of the 9b, the substrate 9a is placed on the incident side of the projection lens 6,
In this configuration example, b is arranged on the emission side, and the wedge-shaped transparent substrate 10 of FIG. 9 is arranged on the emission side of the substrate 9b.

FIG. 16 shows optical elements 100a and 100 using a wedge-shaped transparent substrate which can change the angle of the slope of FIG.
In this configuration example, b is disposed on the incident side of the projection lens 6, and the optical element 100 using the wedge-shaped transparent substrate of FIG. 10 is disposed on the emission side of the projection lens 6.

FIG. 17 is an optical element 100a, 10 using a wedge-shaped transparent substrate which can change the angle of the slope of FIG.
0c of the inner optical element 100a on the incident side of the projection lens 6,
This is a configuration example in which 100c is arranged on the exit side of the projection lens 6.

(Embodiment 15) FIG. 18 is a schematic constitutional view for explaining the constitution of embodiment 15 of the projection type display apparatus of the present invention. The fifteenth embodiment is an example of the configuration of the image rotation element in the configuration in which the image rotation element is added to the optical shift element of the above-described embodiments of FIGS. In order to simplify the description, FIG. 18 is a configuration example for explaining only the position adjustment in the θy axis direction with respect to the optical axis of the projection lens as shown in FIG. 29. Reference numeral 210 is an image rotation element of a trapezoidal prism. The major axis direction of the image rotation element 210 is arranged parallel to the optical axis direction of the projection lens. 210a is an image rotation element 210
Is an entrance surface, and 210b is an exit surface. Reference numeral 210c denotes the bottom surface of the image rotator, which is coated so that the light incident from the incident surface 210a is totally reflected, or the light incident surface 21c so that the light rays are totally reflected at the bottom surface 210c.
The angle of 0a is set. The angles of the entrance surface 210a, the exit surface 210b, and the bottom surface 210c are the same. Therefore, when a light ray is incident on the incident surface 210a in parallel with the optical axis, it is refracted by the incident surface 210a, totally reflected by the bottom surface 210c, and emitted from the exit surface 210b in the same direction as when it was incident. When the image 211 is incident on such an image rotation element 210, it is totally reflected by the bottom surface 210c. Image 2 at this time
11 is turned upside down. From the emission surface 210b, an image 212 is emitted, which is in the same direction as when the light is incident, but the image is vertically inverted. When the image rotator 210 is rotated around the optical axis, the image 212 is rotated at an angle twice this rotation angle. Therefore, if such an image rotation element is added to the optical shift element of FIGS. 5 to 17, the image rotation of the θy axis of the projector can be adjusted.

(Embodiment 16) FIGS. 19 to 21 are views for explaining the structure of Embodiment 16 of the projection type display apparatus of the present invention. The sixteenth embodiment displays a position adjusting test pattern on the screen in the projection type display device of the embodiment shown in FIGS. 1, 2 and 3 and detects the test pattern to shift the light valve from a predetermined position. Is an example of the configuration in which the position shift is optically corrected by calculating and calculating the actuator.

In FIG. 19, reference numeral 220 denotes a screen, and test pattern display areas 220N, 220S, 220 for displaying test patterns on four sides of the screen 220.
W and 220E are provided.

20 and 21 are configuration diagrams for explaining how to drive the actuator for adjusting the position of the projection type display device. In order to simplify the description, the case where there is one projection display device will be described. In FIG. 20, reference numeral 222 denotes a projection type display device, and 223, 225,
Reference numerals 226 and 228 denote actuators for adjusting the above-mentioned optical shift element, which are x-axis, z-axis, and θx, respectively.
An actuator for an optical shift element for adjusting the axis and the θz axis. Reference numerals 224 and 227 are actuators for the y-axis and θy-axis adjustment optical stages. The projection display device 222 displays the position adjustment test pattern on the screen 220, and displays the test pattern display areas 220N, 220S,
The patterns displayed on 220W and 220E are photographed by the image sensors 221N, 221S, 221W and 221E. Reference numeral 229 is a circuit for detecting the focus in the NS direction from the test patterns photographed by the image sensors 221N and 221S, and the actuators 224 and 224 are based on the detection result.
226 is controlled.

Similarly, 230 is the image sensor 221.
This is a circuit for detecting the focus in the WE direction from the test pattern photographed by W, 221E, and controls the actuator 228 based on the detection result. Reference numeral 231 is a circuit that detects a shift in the x-axis direction from the test pattern captured by the image sensors 221W and 221E, and controls the actuator 223 based on the detection result. 232 is z from the test pattern photographed by the image sensors 221N and 221S.
This is a circuit that detects a shift in the axial direction, and controls the actuator 225 based on the detection result. Reference numeral 233 denotes a circuit that detects a rotation deviation in the θy axis direction from the test patterns photographed by the image sensors 221W and 221E, and controls the actuator 227 based on the detection result.

Focus detection by the detection circuits 229 and 230, for example, extracts the shape of a pixel from the test pattern displayed in the test pattern area and measures the vertical and horizontal sizes of the pixel. This can be done by controlling the actuator so that the shape of the extracted pixel becomes the minimum size. The shift detection by the detection circuits 231 and 232 can be performed by the method shown in FIG.

FIG. 21 shows a test pattern display area 220N,
The cross pattern displayed on 220S is shown. The shift in the x-axis direction is detected from the pattern displayed on 220N (or 220S) as shown in FIG. That is, the deviation amount Sz between the test pattern and a preset cross-shaped reference line in the horizontal direction is measured, and the actuator 22
Control 3 The shift in the y-axis direction is detected from the pattern displayed on 220W (or 220E) as shown in FIG.

That is, the deviation amount Sx between the test pattern and the preset reference line in the vertical direction is measured, and the actuator 225 is controlled. The rotational deviation (θy axis) about the optical axis by the detection circuit 233 measures the angle between the straight line connecting the intersections of the cross patterns displayed on 220W and 220E and the horizontal line of the reference line, and controls the actuator 227. 1
When the adjustment of the projection type display device of the stand is completed, the position adjustment between the projection type display devices can be performed by the above-described method with reference to the display of the projection type display device. The position adjustment algorithm used in the present invention is not limited to the method described with reference to FIGS.

(Embodiment 17) FIG. 22 is a schematic constitutional view for explaining the constitution of Embodiment 17 of the projection type display apparatus of the present invention, in which 205, 206 and 207 are projectors provided with an optical shift element, 7 is a screen. 11, 1
2, 13 are light sources, 21, 22, 23 are filters for cutting infrared rays and ultraviolet rays generated from the light sources, 31, 32,
33 is an optical filter, 41, 42, 43 are condenser lenses, 51, 52, 53 are light valves, 61, 62, 6
3 is a projection lens, and 81, 82 and 83 are flat transparent substrates.

The seventeenth embodiment shows an example of the construction of a multi-projection system which provides a large screen display having a very long horizontal shape whose aspect ratio is different from the standard 3: 4. In the area A of the screen 7, the screen of the projector 205 is projected,
The screen of the projector 206 is projected in the area B, and the screen of the projector 207 is projected in the area C to display a horizontally long continuous large screen. Therefore, it is necessary to adjust the joints of the respective areas on the screen for each pixel, that is, to adjust the position between the projectors.

The seventeenth embodiment shows a case where the position adjustment of the z axis of the projector is performed. For example, the projector 205
When the screen is projected on the screen and the right end of the screen is projected over the area B of the screen, the pixel alignment is performed by the following method. The flat transparent substrate 81 of the projector 205 is tilted at an angle with respect to the optical axis m1 to shift the optical path to n1. That is, the projection image of the projector 205 shifts to the left on the paper surface, and pixel matching can be realized. x-axis,
The adjustment of the y-axis, the θx-axis, the θy-axis, and the θz-axis can be realized by applying the optical shift elements described in Examples 1 to 17.
The optical action is similar to that of the optical shift element shown in FIGS. 5 to 12, and therefore the following description is omitted.

(Embodiment 18) FIG. 23 is a schematic constitutional view for explaining the constitution of the embodiment 18 of the projection type display apparatus of the present invention, wherein the z-axis direction shown in FIG. This is a configuration example in which the shift amount S can be changed and the shift amount S can be changed arbitrarily. The driver 108 includes the connector 105 and the drive arm 10.
6 and the micrometer 107. 300a,
Reference numerals 300b and 300c are Y-shaped universal joints, in which the angle β formed by the Y-shape can be arbitrarily changed. In the figure, when the micrometer 107 moves in the left-right direction, the connector 105 continuously works in the up-down direction via the drive arm 106, and the two flat plate transparent substrates 102b and 102c connected to each other.
Keeps parallel to each other and moves back and forth around the fulcrum in the figure toward the paper surface, and the angle changes with respect to the light ray (optical axis) m1. Therefore, the shift amount of the light beam (optical axis) m11 can be shifted according to the working distance of the micrometer. In the figure, reference numeral 302 denotes a rotary shaft, and the optical element 10
0a and 100b are connected to each other, and the optical elements 100a and 1b are connected.
Screws in opposite directions are formed at the center of 00b. Optical element 1 by rotating the rotating shaft
00a and 100b travel in opposite directions. That is, the distance d can be arbitrarily changed while keeping the optical elements 100a and 100b parallel to each other. As a result, the shift amount can be changed arbitrarily.

Regarding the structure and shift amount of the optical element,
This is as shown in Example 5 above.

(Embodiment 19) FIGS. 24A and 24B are views showing the configuration of Embodiment 19 of the projection type display apparatus of the present invention, wherein FIG. 24A is a side view and FIG. 24B is a front view of FIG. . Example 19
7 is another embodiment of the biaxial adjusting mechanism for shifting the light ray direction in the x-axis and y-axis directions in the fifth embodiment of FIG.

In FIG. 24, 400 is a flat transparent substrate 1.
It is a spacer for keeping 02b and 102c parallel.
The flat transparent substrates 102b and 102c are fixed by a spacer 400. Reference numerals 401 and 402 denote rotation axes of the spacer 400, which are a z-axis rotation axis and an x-axis rotation axis, respectively. 40
3 is a support for fixing the flat transparent substrates 102a and 102d. 404 is a column having a mechanism that supports the spacer 400 and can rotate around the x-axis 402. 405 is a column 4
It is a column having a mechanism for supporting 04 and rotating the column 404 around the z axis. The rotation mechanism of the column 405 is the spacer 4
00 is not directly driven, so the support 404 is attached to the rotary shaft 4
When rotated about 01, the spacer 400 rotates about the z axis without affecting the rotation axis 402.

FIG. 24C is a view showing a mechanism for rotating the spacer 400 and the support 404.
405. 406 is a drive arm,
When a force is applied in the direction of the arrow, it rotates around the fulcrum 407. Reference numeral 408 is a spring that is connected to the spacer 400 and is necessary to maintain the rotation angle. Therefore, when a force is applied in the direction of the arrow, the spacer 400 moves to the rotating shaft 401.
Rotate around the center of the flat plate transparent substrate 102b and 102c
Are parallel to each other and are inclined with respect to the flat transparent substrate 102a. As a result, the incident light beam is shifted along the two axes of the x axis and the z axis.

(Embodiment 20) FIG. 25 is a schematic constitutional view showing the constitution of Embodiment 20 of the projection type display apparatus of the present invention, in which the angle of the inclined surface is set in the optical shift elements of Embodiments 1, 2 and 3. This is a configuration example using a wedge-shaped transparent substrate that can be changed and a wedge-shaped transparent substrate that can change the angles on both sides.

In the configuration example shown in FIG. 12, the flat transparent substrate 102d has a structure in which both the x-axis and the z-axis can be varied, but FIG. 25 shows the flat transparent substrates 102a and 102d.
By changing the angle of the sheet in the different uniaxial directions, θx,
An example of adjusting the tilt of the θz axis will be shown. That is, the flat transparent substrate 102d rotates about the rotation axis 501 in the direction perpendicular to the paper surface. The flat transparent substrate 102a rotates about a rotation axis 502 in a direction horizontal to the paper surface.
106c is a drive arm and 107c is a micrometer. When the micrometer 107c is operated in the left-right direction, the drive arm operates in the up-down direction, and the flat plate transparent substrate 102a rotates about the rotation shaft 502 in conjunction with each other. Driver 10
The operations and optical functions of 8a and 108b are the same as in the ninth embodiment, and will not be described.

(Embodiment 21) FIG. 26 is a side view showing the configuration of Embodiment 21 of the projection type display device of the present invention, and FIG.
26 is a partially enlarged view of FIG. 26, and FIG. 28 is a rotary shaft 60 of FIG.
FIG. 3 is a cross-sectional view of a surface formed by 1,602.

The projection type display device of the twenty-first embodiment is another embodiment of the biaxial adjusting mechanism for shifting the light beam direction to the x-axis and z-axis directions in the fifth embodiment of FIG. Also,
The difference from the configuration of Example 19 in FIG. 24 is that the rotation axes of the spacer and the flat transparent substrate are at different positions.

In FIGS. 26, 27 and 28, 600
Is a spacer for keeping the flat transparent substrates 102b and 102c parallel to each other. Flat plate transparent substrates 102b and 102
c is not fixed to the spacer 600 with an adhesive or the like as in the nineteenth embodiment, but is in contact with each other, but the surfaces of the two are slid. To reduce the frictional force on the contact surface, for example, there is a structure as shown in FIG. Spacer 600 that contacts flat transparent substrates 102b and 102c
In this structure, a plurality of metal balls 610 are arrayed on the end face of the plate to reduce the contact area with the flat transparent substrate and reduce the frictional force. 601 and 602 are the rotation axes of the spacer 600,
These are the z-axis and x-axis rotation axes (FIG. 28), respectively.

Reference numerals 604b and 604c are frames for holding the flat transparent substrates 102b and 102c, respectively. Reference numeral 603 is a column having a mechanism for supporting the spacer 600 by the shafts 606a and 606b on the rotation shaft 602 and further rotating the spacer 600 about the shafts 606a and 606b. Therefore, the spacer 600 rotates about the rotation shaft 602. When the spacer 600 rotates, the flat transparent substrate 10
2b and 102c receive a rotational driving force, but the flat plate transparent substrate and the spacer are not fixed, and therefore rotate on a rotating shaft different from the rotating shaft 602.

Reference numeral 605 supports the support 603 by means of a shaft 607 on the rotary shaft 601 and supports the flat plate transparent substrates 102a, 102a.
Hold d. Further, it is a column having a mechanism capable of rotating the column 603 around the axis 607. Therefore, the spacer 600 rotates about the rotation shaft 601. Also at this time,
The flat transparent substrates 102b and 102c rotate on a rotation axis different from the rotation axis 601. Since the rotation mechanism of the support 605 does not directly drive the spacer 600, when the support 603 is rotated about the rotation shaft 601, the spacer 600 rotates about the z axis without affecting the rotation shaft 602.

On the contrary, even if the spacer 600 is rotated about the rotation shaft 602, the support 603 does not rotate, so that the rotation of the spacer 600 on the rotation shaft 601 does not occur. The rotation of the spacer 600 and the column 603 is, for example, as shown in FIG.
The rotation mechanism as shown in (c) may be installed on each side surface. Since the twenty-first embodiment has such a configuration, the flat plate transparent substrates 102b and 102c are inclined in two axes with respect to the flat plate transparent substrate 102a while keeping parallel to each other. As a result, the incident light beam is shifted along the two axes of the x axis and the z axis.

608 and 609 are frames 604b, 60.
It is a spring that supports 4c. Usually, the frame is displaced downward due to the weight of the frame, the flat transparent substrate, and the transparent liquid. Spring 608,
Reference numeral 609 is provided to cancel this deviation. The downward displacement of the frame vertically shifts along the surface of the spacer 600 because the volume of the transparent liquid 103 is constant. Due to this displacement, the sealing material 104 is deformed and the rotational driving load on the rotating shaft 602 of the spacer 600 increases. However, if this increase in drive load is not a problem, the springs 608 and 6
09 is not necessary. In the twenty-first embodiment, the tilt mechanism for the θx and θz axes is not provided, but it is clear that the drive mechanism as shown in FIG. 25 may be provided on the flat plate transparent substrates 102a and 102d.

(Embodiment 22) FIG. 29 is a side view showing the structure of Embodiment 22 of the projection type display device of the present invention, and FIG.
29 is a partial enlarged view of FIG. 29, and FIG. 31 is a cross-sectional view of the rotary shaft of FIG.

The projection type display device of the twenty-second embodiment is another embodiment of the biaxial adjusting mechanism for shifting the light beam direction to the x-axis and z-axis directions in the fifth embodiment shown in FIG. Also,
The difference from the structure of the twenty-first embodiment shown in FIG. 30 is that the spacer of the twenty-first embodiment rotates while the spacer of the twenty-second embodiment moves in parallel.

In FIG. 29, FIG. 30, and FIG. 31, 700
a, 700b, 700c, 700d are flat plate transparent substrates 10
It is a spacer for keeping 2b and 102c parallel to each other.
704b and 704c are flat transparent substrates 102b and 704b, respectively.
A frame for holding 102c. Spacers 700a, 70
0b, 700c, 700d are 4 of the frames 704b, 704c
Flat transparent substrates 102b and 102c provided in the corners
Is not fixed with an adhesive or the like as in the nineteenth embodiment, but is in contact with each other but is allowed to slide freely within the three-dimensional coordinates. As the structure of this contact surface, for example, FIG.
There is a structure like 0.

FIG. 30 is an enlarged view of the contact surface between the spacer 700a and the frame 704b. 7 at the end of the spacer 700a
A handle having a spherical tip like 08a is attached, and the handle 708a can freely rotate in the hole provided in the frame 704b. This structure has a spacer 70
It is provided at both ends of 0a, 700b, 700c and 700d. 701a and 702a are rotation axes of the frame 704b,
These are the z-axis and x-axis rotation axes (FIG. 31), respectively. 701
Reference numerals b and 702b (not shown) are rotation axes of the frame 704c, that is, a z-axis rotation axis and an x-axis rotation axis, respectively.

Reference numeral 703a denotes a shaft 70 on the rotary shaft 702a.
6a and 706b support the frame 704b, and the shaft 7
It is a column having a mechanism capable of rotating the frame 704b around 06a and 706b. The support 703b also has the same structure as the support 702a.

Therefore, the flat transparent substrates 102b and 10b
Reference numeral 2c rotates about rotation shafts 702a and 702b, respectively. Usually, the rotation axis of the flat transparent substrate is set at a point where the rotational driving load is minimized.

Reference numeral 705 denotes a shaft 707 on the rotary shaft 701a.
The support 703a is supported by a, and the support 703b is supported by the shaft 707b on the rotation shaft 701b. Furthermore, axis 7
This column has a mechanism capable of rotating the column 703a around the axis 07a and rotating the column 703b around the axis 707b.

Therefore, the flat plate transparent substrate 102b is centered on the rotary shaft 701a, and the flat plate transparent substrate 102c is the rotary shaft 7a.
Rotate around 01b. Since the spacers 700a, 700b, 700c, 700d are not directly driven in the rotation mechanism of the support 705, rotating the support 703a or 703b around the rotation shaft 701a or 701b may affect the rotation shafts 702a, 702b. Instead, the flat plate transparent substrates 102b and 102c rotate around the z axis.

On the contrary, even if the flat plate transparent substrates 102b and 102c are rotated about the rotation axis 702a or 702b, the support columns 703a and 703b do not rotate, so that the flat plate transparent substrates 102b and 102c do not rotate on the z-axis.
To rotate the frames 704b and 704c and the columns 703a and 703b, for example, a rotation mechanism as shown in FIG. 24C may be installed on each side surface.

However, this rotating mechanism has 7
04b or 704c, as well as the columns 703a or 703b.

When the frame 704b rotates clockwise about the rotation shaft 702a, the spacers 700a and 700b move in the directions of the arrows as shown in FIG.
d moves in the opposite direction to these, the rotational driving force propagates to the frame 704c, and the frame 704c rotates about the rotation shaft 702b. At this time, if the lengths of the rotation axis that is the radius of rotation and the end surface of the frame are the same in the frames 704b and 704c, the spacers 700a and 700b are 700c and 700d.
Hold parallel to and move.

Therefore, the frame 704b has the rotating shaft 702a.
If you rotate around the center, the flat transparent substrates 102b and 102c
Is inclined with respect to the flat plate transparent substrate 102a while maintaining parallelism.

Similarly, when the support 703a rotates about the rotation shaft 701a, the frame 704b rotates about the rotation shaft 701a. Spacers 700a, 700b, 700c, 7
Since the end point of 00d can freely rotate with respect to the frame as shown in FIG. 30, the rotational movement of the frame 704b propagates to the frame 704c, and the frame 704b rotates about the rotation axis 701b. With such a configuration, the flat transparent substrates 102b and 10b
2c is inclined on two axes with respect to the flat plate transparent substrate 102a while maintaining parallelism. As a result, the incident light beam is shifted along the two axes of the x axis and the z axis.

Although the tilting mechanism for the θx and θz axes is not provided in the twenty-first embodiment, it is obvious that the driving mechanism as shown in FIG. 25 may be provided on the flat plate transparent substrates 102a and 102d.

Although the present invention has been specifically described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Of course.

[0100]

As described above, according to the present invention, the transparent substrate is arranged between the projection lens and the light valve or in front of the projection lens, and the surface of the transparent substrate is set as the optical axis of the projection lens. In contrast, by making it variable, the optical path of the projector can be changed in 4 directions out of 6 by using only the transparent substrate. Also, since this transparent substrate is extremely lightweight, the adjustment optical stage is extremely compact and lightweight. Can be changed.

Furthermore, since the optical stage is lightweight,
There is an advantage that a motor or the like for driving the device can be downsized and the position can be easily adjusted. If these position adjusting mechanisms are applied to a high-definition large-screen display device and a multi-projection system in which a plurality of projectors are superimposed and projected, high-definition position adjustment can be easily configured.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram for explaining a configuration of a first embodiment of a projection type display device of the present invention,

FIG. 2 is a schematic configuration diagram for explaining the configuration of Example 2 of the projection type display device of the present invention,

FIG. 3 is a schematic configuration diagram for explaining the configuration of Example 3 of the projection type display device of the present invention,

FIG. 4 is a configuration diagram illustrating the principle of superimposed projection according to the first, second, and third embodiments,

FIG. 5 is an optical path diagram for explaining the operation of the flat transparent substrate of Examples 1, 2, and 3;

FIG. 6 is a schematic configuration diagram for explaining the configuration of Example 4 of the projection type display device of the present invention,

FIG. 7 is a schematic configuration diagram for explaining the configuration of Example 5 of the projection type display device of the present invention,

FIG. 8 is a schematic configuration diagram for explaining the configuration of a modified example of the fifth embodiment of the projection type display device of the present invention,

FIG. 9 is a schematic configuration diagram for explaining the configuration of Example 6 of the projection type display device of the present invention,

FIG. 10 is a schematic configuration diagram for explaining the configuration of Example 7 of the projection type display device of the present invention,

FIG. 11 is a schematic configuration diagram for explaining the configuration of Example 8 of the projection type display device of the present invention,

FIG. 12 is a schematic configuration diagram for explaining the configuration of Example 9 of the projection type display device of the present invention,

FIG. 13 is a schematic configuration diagram for explaining the configuration of Example 10 of the projection type display device of the present invention,

FIG. 14 is a schematic configuration diagram for explaining the configuration of Example 11 of the projection type display device of the present invention,

FIG. 15 is a schematic configuration diagram for explaining the configuration of Example 12 of the projection type display device of the present invention,

FIG. 16 is a schematic configuration diagram for explaining the configuration of Example 13 of the projection type display device of the present invention,

FIG. 17 is a schematic configuration diagram for explaining the configuration of Example 14 of the projection type display device of the present invention,

FIG. 18 is a schematic configuration diagram for explaining the configuration of Example 15 of the projection type display device of the present invention,

FIG. 19 is a diagram for explaining the configuration of Example 16 of the projection type display device of the present invention,

FIG. 20 is a configuration diagram for explaining the configuration of Example 16 of the projection type display device of the present invention,

FIG. 21 is a configuration diagram for explaining the configuration of Example 16 of the projection type display device of the present invention,

22 is a schematic configuration diagram for explaining the configuration of Example 17 of the projection type display device of the present invention, FIG.

FIG. 23 is a schematic configuration diagram for explaining the configuration of Example 18 of the projection type display device of the present invention,

FIG. 24 is a diagram showing the configuration of Example 19 of the projection type display device of the present invention;

FIG. 25 is a schematic configuration diagram showing the configuration of Example 20 of the projection type display device of the present invention,

FIG. 26 is a side view showing the configuration of Embodiment 21 of the projection type display device of the present invention,

27 is a partially enlarged view of FIG. 26,

28 is a sectional view of the rotary shaft of FIG. 26,

FIG. 29 is a side view showing the configuration of Embodiment 22 of the projection type display device of the present invention,

30 is a partially enlarged view of FIG. 29,

31 is a sectional view of the rotary shaft of FIG. 29,

FIG. 32 is a schematic explanatory view of a conventional projection display device,

FIG. 33 is a schematic explanatory view of a conventional projection type display device having a function of superposing projection images,

FIG. 34 is an explanatory diagram of the principle of superimposing four conventional images,

FIG. 35 is a schematic explanatory view showing a conventional adjustment direction.

[Explanation of symbols]

1, 11, 12, 13 ... Light source, 2, 21, 22, 23 ...
Infrared / UV cut filter, 3, 31, 32, 3
3 ... Optical filter, 4, 41, 42, 43 ... Condensing lens, 5, 51, 52, 53 ... Light valve, 6, 61,
62, 63 ... Projection lens, 7 ... Screen, 102 ... Transparent glass, 8, 81, 82, 83, 102a, 102
b, 102c, 102d ... Flat plate transparent substrate, 9a, 9b,
10, 91, 92 ... Wedge-shaped transparent substrate, 100, 100
a, 100b, 100c ... Optical element, 103 ... Transparent liquid, 104 ... Sealing material, 105 ... Connector, 106, 10
6c, 406 ... Drive arm, 107, 107c ... Micrometer, 108, 108a, 108b, 131, 1
32, 133 ... Driver, m, m1, m2, m3, m4 ...
Optical axis of projection lens, m11, m22 ... Optical axis shifted by shift amount S with respect to optical axis, S ... Shift amount of m11, m22, 300a, 300b, 300c ... Universal joint, 30
2 ... Rotating shaft, 400 ... Spacers, 401, 40
2, 501, 502 ... Rotation axis, 403, 404, 405
... Posts, 407 ... Support points, 408 ... Springs, 600,700
a, 700b, 700c, 700d ... Spacer, 60
1, 602, 701a, 701b, 702a, 702b
... Rotation axis, 604b, 604c, 704b, 704c ...
Frame, 603, 605, 703a, 703b, 705 ... Post, 606a, 606b, 607, 706a, 706
b, 707a, 707b ... Shaft, 608, 609 ... Spring,
610 ... Metal ball, 708a ... Handle.

Claims (3)

[Claims] 1. A projection type display device for projecting images projected from a plurality of projection type display modules, which magnify and project an image displayed on a light valve onto a screen by a projection optical system, in a single screen, wherein the projection optical system is provided. 2. A projection type display device, wherein one or a plurality of different light shift elements are provided on at least one of an incident side and an emitting side of the projection lens. 2. A plurality of projection type display modules having no projection lens, and light of the plurality of projection display modules is made incident on one projection lens by a plurality of mirrors to superimpose projection images from the plurality of projection display modules. A projection type display device having means for combining and enlarging and projecting on one screen, wherein a light shift element is provided between the projection display module and the mirror. 3. The projection display device according to claim 1, wherein the light valve displays test data, the test data is detected, and a deviation of the light valve from a predetermined position is calculated. And a means for optically correcting the positional deviation by the light shift element.