JPH10206969A - Image display device and attachment for image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the image display device which can easily vary the size of a display image without replacing a screen and facilitates storage management and transportation and is good in usability. SOLUTION: This device has a reflection type screen 12 provided on the image projection device 10 and an attachment for optical path formation which is provided on the image projection device 10 and forms an image formation optical path for guiding the image forming luminous flux from the image projection device 10 to the screen 12. This attachment 14 for optical path formation is equipped with optical path length adjusting means 141, 142, 145 to 147 to vary and adjust the optical path length of the image formation optical path extending from the image projection device 10 to the screen 12 and also equipped with two mirrors M1 and M2 to bend the optical path of the image forming luminous flux.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image display device and an attachment for the image display device.

[0002]

2. Description of the Related Art As a display system for displaying an image generated or processed by a computer or the like, or an image recorded on a recording medium such as a magnetic tape, a magnetic disk, or an optical disk, two pixels for controlling transmission or reflection of light are used. A device using an image projection device that two-dimensionally modulates light from a light source with one or more light spatial modulation elements arranged in a two-dimensional manner and emits it as an image forming light flux has been realized and is becoming popular.

In such a display system, an image to be displayed has a "distribution state of pixels that transmit light and pixels that do not transmit" in a two-dimensional pixel array of a spatial modulation element.
Alternatively, it is expressed as “a distribution state of pixels that reflect light and pixels that do not reflect light”. By making light incident on the spatial modulation element in such a state, the transmitted light or the reflected light is spatially modulated, and is formed into an image forming light beam by an image forming optical system.
The image is enlarged and displayed by forming an image on a light image reflector such as a screen.

In such a display system, when used personally, an image forming light beam from the image projection device is displayed on a relatively small-sized screen. The small-size screen is removed, and the image light from the image projection device is focused on a large-size screen so that the image displayed in the large size can be viewed. An image display device unitized as an image display unit is commercially available.

In such an image display device, it is necessary to change the screen according to the size of the screen on which an image is displayed, and when displaying an image on a large-size screen, the small-size screen is moved from the image display unit. There is a problem that it is necessary to remove it and workability is poor. Also,
Since the image display unit and the large-size screen are separate bodies, there is also a problem that these "storage management and carrying" are troublesome, and there is a problem that practical "usability" is not always good.

[0006]

According to the present invention, the size of a displayed image can be easily changed without replacing a light image reflector such as a screen, so that storage management and portability are easy and user-friendliness is improved. It is an object to realize an image display device.

The present invention is also mounted on an image display device, and can easily change the size of a displayed image without replacing a light image reflector such as a screen, so that storage management and portability are easy. An object of the present invention is to provide an attachment for an image display device that can enhance the usability of the display device.

[0008]

An image display device according to the present invention includes an image projection device, an optical image reflector, and an optical path forming attachment.

An "image projection apparatus" emits a light beam two-dimensionally modulated by one or more light spatial modulation elements in which pixels for controlling transmission or reflection of light are two-dimensionally arranged as an image forming light beam. The device may be, for example, any of various “liquid crystal projectors” typified by a projection television. When the image projection device is a liquid crystal projector, the light spatial modulation element is a so-called “liquid crystal panel”, and when the displayed image is a color image, one panel is composed of red, green, and blue (R. A “single-panel type panel” having pixels for G and B) and a “three-panel type” using one panel for each of R, G, and B images are possible. That is, when an image to be displayed is a color image, and when a single-panel liquid crystal panel is used as the light spatial modulation element, the imaging light flux is two-dimensionally modulated by one light spatial modulation element. And 3 as a spatial light modulator
When a single-panel type liquid crystal panel is used, a light beam that is two-dimensionally modulated by three spatial light modulating elements (each of the three liquid crystal panels) is combined into an image forming light beam.

The pixel distribution on the spatial light modulator modulates transmitted light or reflected light to form an imaging light flux, and the imaging light flux is projected and imaged on a light image reflector by an imaging lens. The imaging lens is a variable magnification, and is capable of continuously changing or stepwise switching of the imaging magnification.

The "optical image reflector" is a medium, such as a screen, for allowing an observer to recognize a displayed image, and is provided in an image projection device. As the light image reflector, a mirror, a half mirror, a known holographic combiner, or the like can be used in addition to the screen.

The size of the light image reflector is determined according to the maximum size of the image to be displayed, but is preferably about 90 cm × 70 cm from the viewpoint of compactness in storage. With such a size, the image display device can be used on a desk as a “desktop” type. If the size of the light image reflector is too large, it is difficult to use it on a desk and it is inconvenient to store it. Conversely, if the size of the light image reflector is too small (about 30 cm × 20 cm), the practical advantage of changing the size of the display image is poor.

The "optical path forming attachment" is provided in the image projecting apparatus and forms an image forming optical path for guiding the image forming light beam from the image projecting apparatus to the optical image reflector. It has two mirrors. The “optical path length adjusting unit” is a unit that changes and adjusts the optical path length of the imaging light flux from the image projection device to the optical image reflector mounted on the image projection device. The “two mirrors” are for bending the optical path of the image forming light beam.

In the image display device according to the first aspect, the optical image reflector and the optical path forming attachment may be "removably attachable to the image projection device".
It may be "provided integrally with the image projection device" (claim 3). Of course, one of the optical image reflector and the optical path forming attachment may be integrated into the image projection device, and the other may be detachable from the image projection device.

As a method of integrating the optical image reflector and / or the optical path forming attachment into the image projection apparatus,
A known appropriate integration method such as bonding, welding, and fixing with a fixing member such as a screw can be used. Also, an optical image reflector and / or
Alternatively, in order to make the optical path forming attachment detachable from the image projecting device, a known appropriate engaging / disengaging means such as a hook can be used. When the light image reflector is integrated with the image projection device, the light image reflector may form a part of a casing of the image projection device. That is, a part of the casing of the image projecting device is enlarged to a necessary size as a light image reflector.

The attachment for forming an optical path can be constituted by a mirror support, two mirrors, and a base support. In this case, the "mirror support" is composed of two or more rod-like supports and a joint member. The "two or more rod-shaped supports" are connected in series to each other, and the "joint member"
Adjacent pole supports are flexibly connected to one another. "2
The "mirrors" are provided on the mirror support so that the direction of the reflection surface can be adjusted. The “base support” supports the base of the mirror support. The “rod-like support structure between the two mirrors” in the mirror support is extendable. The “rod-like support structure” is a structure in which a plurality of rod-like supports are connected linearly.

In the image display device according to the fourth aspect, it is possible to "make the rod-like support structure forming the base of the mirror support expandable and contractable" (claim 5). Furthermore, the base support portion can be configured to "accommodate at least a part of the rod-shaped support structure forming the base of the mirror support" (claim 6).

In the image display device according to any one of the first to sixth aspects, the light image reflector is provided in the image projection device so as to be parallel to the optical axis of the image forming light beam emitted from the image projection device. (Claim 7).

An attachment for an image display device according to the present invention includes a holder for an image projection device, an optical image reflector, and an attachment for forming an optical path. The “holder for image projection device” holds the image projection device. The “light image reflector” is provided in the holder for the image projection device. The light image reflector may be the same as that described above in relation to the image display device, such as a screen or a holographic combiner.

The "optical path forming attachment" is provided in the image projecting apparatus holder, and forms an image forming optical path for guiding an image forming light beam from the image projecting apparatus held in the image projecting apparatus holder to the optical image reflector. Attachment for
"Optical path length adjusting means" for changing and adjusting the optical path length of the imaging light flux from the image projection device to the optical image reflector provided on the image projection device holder; and "2" for bending the optical path of the imaging light flux. Mirrors ".

The optical image reflector and the optical path forming attachment may be provided detachably with respect to the image projection device holder (claim 9), or may be integrally provided with the image projection device holder. (Claim 10) One of the optical image reflector and the optical path forming attachment may be integrated with the holder for the image projection apparatus, and the other may be detachable from the holder.

In the attachment for an image display device according to claim 8, the "optical path forming attachment" comprises two or more rod-shaped supports connected in series with each other and an adjacent rod-shaped support. A "mirror support" consisting of a joint member connected so as to be able to bend with each other,
The mirror support has two mirrors provided so that the direction of the reflection surface can be adjusted, and a base support for supporting the base of the mirror support.
The pole-shaped support structure between the mirrors can be configured to be extendable (claim 11).

[0023] In the attachment for an image display device according to the eleventh aspect, the "rod-shaped support structure" forming the base of the mirror support can be made extendable and contractable.
The base support portion may be configured to house at least a part of the rod-shaped support structure that forms the base of the mirror support.

[0024] In the attachment for an image display device according to any one of claims 8 to 13, the optical image reflector may include:
The image projection device holder can be provided so as to be parallel to the optical axis of the image forming light beam emitted from the image projection device held by the image projection device holder.

It should be noted that the image projection apparatus may use "a unit in which a spatial light modulator, a light source, and an imaging optical system are separated as a unit from a control unit".
In the image display device according to any one of the first to seventh aspects, the optical image reflector and the optical path forming attachment can be provided in the “unit of the spatial light modulator, the light source, and the imaging optical system”. The unit can be held in the holder for the image projection device of the attachment for the device.

Further, in the image display device according to any one of the first to seventh aspects, the image projection device can be "built-in a pointer light source indicating an image forming area of a display image" (claim 15). Needless to say, such an “image projector incorporating a pointer light source” can be held in the holder for the image projector of the attachment for an image display according to claims 8 to 14.

[0027]

FIG. 1 is a diagram for explaining an embodiment of an image display device according to the present invention. FIG. 1 (a)
, Reference numeral 10 indicates an “image projection device”.
The image projection device receives an image signal generated or processed by an “image signal output device” such as a computer or a VTR from an input terminal 10A, and converts an image corresponding to the input signal into a two-dimensional “light spatial modulation element”. It is formed and spatially modulates light and emitted as an image forming light beam by the image forming lens 10B, and is, for example, a "liquid crystal color projector". Reference numeral 10C indicates a power supply connection outlet of the image projection apparatus 10.

Reference numeral 12 denotes a screen as a “light image reflector”. The screen 12 is of a reflection type, and is irradiated with an image forming light beam to form a display image, and the display image on the screen is observed by the light reflected by the screen 12. As the screen 12, a "white plastic plate whose surface is roughened to diffuse and reflect light" or the like can be suitably used.

Reference numeral 14 denotes an "attachment for forming an optical path".
Is shown. In the embodiment shown in FIG. 1, the “attachment for forming an optical path” is according to the invention of claim 4, wherein two or more rod-like supports 1 connected in series with each other.
41, 142, 143, 144, 145, 146, 14
7,148, and these rod-shaped supports, adjacent rod-shaped supports, ie, "rod-shaped supports 142 and 143", "rod-shaped supports 143 and 134", "rod-shaped supports 144 and 145",
Joint members 1411, 1412, 141 for connecting the “rod-shaped supports 147 and 148” so as to be bendable with each other.
3, 1414, two mirrors M1 and M2, and a base indicator 14A.

The rod-like supports 141, 142,. . When,
The joint members 1411, 1412,. . Constitutes a “mirror support”, and the two mirrors M1 and M2 are provided on the mirror support so that the direction of the reflection surface can be adjusted.
4A supports the base of the mirror support. The "rod-like support structure" between the two mirrors M1 and M2 supported by the mirror supports, that is, the rod-like supports 145, 146, and 147
Can be expanded and contracted.

The mirror M1 is attached to the joint member 1412 by a fixture 1412A provided on the joint member 1412.
And the direction of the reflective surface can be adjusted manually. As shown in FIG. 1 (b), the mirror M2 is provided with an appropriate fixture 149 at the tip of the rod-shaped support 148.
And the direction of the reflecting surface can be adjusted.

The joint members 1411, 1412, 141
Reference numerals 3 and 1414 denote pivots, which in the illustrated embodiment can maintain the bent state of the adjacent rod-shaped support by "friction". Of course, the pivots may be provided with fastening means such as "tightening screws". And the bent state may be maintained by tightening by this means.

In the embodiment shown in FIG. 1, the rod-shaped support structure forming the base of the "mirror support", that is, the "structure in which the rod-shaped supports 141 and 142 are linearly connected" can be expanded and contracted. (Claim 5) A part of the "mirror support base" formed by the rod-shaped support structures of the rod-shaped supports 141 and 142 is stored in the base support portion 14A (claim). Item 6).

As described above, the rod-like supports 141 and 142
"Rod-shaped support structure", and rod-shaped supports 145, 14
Since the “rod-shaped support structure”, which is a structure portion in which the image forming apparatuses 6 and 147 are linearly connected, can be expanded and contracted, the expansion and contraction of the “rod-shaped support structure” causes the “screen 12 Thus, these rod-shaped support structures constitute "optical path length adjusting means" in the first aspect of the present invention.

When displaying an image, as shown in FIG. 1A, an image forming light beam from the image
1, the light path is sequentially reflected by M2 to bend the light path, and the screen 1
Project on 2 At this time, an optical path length corresponding to the imaging magnification is realized by utilizing expansion and contraction of the rod-shaped support structure, and the mirror M
The display image is formed on the screen 12 by adjusting the direction of the anti-slope of M1 and M2. By changing the imaging magnification of the imaging lens of the image projection device 10 and adjusting the optical path book by the optical path length adjusting means of the optical path forming attachment accordingly, the maximum display size of the screen 12 is reduced to a smaller minimum display size. The size of the display image can be adjusted as desired.

As shown in FIG. 1C, the rod-shaped support 14
A part of the “base of the mirror support” by the rod-shaped support structure of the first and second rods 142, that is, the base of the rod-shaped support 141 is slidable in the storage tube 140 formed in the base support 14 </ b> A. The rod-shaped support 141 is fitted to the storage cylinder 1
40.

The rod-shaped support 141 has a hollow cylindrical shape, and the rod-shaped support 142 is slidably fitted on the rod-shaped support 141. Therefore, the rod-shaped support 142 is
Can be pushed inside. Thus, the rod-shaped support 1
41 and the rod-like support 1
The length of the optical path from the image projection device 10 to the mirror M1 can be adjusted by adjusting the length of pulling out 42 from the rod-shaped support 141.

Similarly, the rod-shaped supports 146, 147, 14
8 is also a hollow cylinder, and the rod-shaped support 147 and the rod-shaped support 148 are slidably fitted to the rod-shaped support 146 and the rod-shaped support 147, respectively. By doing so, the optical path length between the mirrors M1 and M2 can be adjusted.

At the time of storage, the rod-shaped support 142 is pushed into the rod-shaped support 141, the rod-shaped support 141 is pushed into the storage cylinder 140, and the rod-shaped support 147 is inserted into the rod-shaped support 146. By pushing the support 146 into the rod-shaped support 145, the “optical path forming attachment” is
As shown in FIG. 1 (b), it can be made compact. In FIG. 1B, the illustration of the image projection device and the screen is omitted to avoid complication.

In the embodiment described above with reference to FIG. 1, the screen 12 and the "optical path forming attachment" are provided integrally with the image projection device 10 (claim 3). However, the screen 12 and the “optical path forming attachment” may be detachable from the image projection device 10 (claim 2). When the screen 12 and the optical path forming attachment 14 can be detached from the image projecting device, the screen and the optical path forming attachment can be removed to display an image on another screen having a larger size than the screen 12 to be mounted. It is convenient.

In the embodiment shown in FIG. 1, the screen 12 is provided on the image projecting device 10 so as to be "parallel to the optical axis of the image forming light beam emitted from the image projecting device 10" (claim). Item 7).

In general, the image projection apparatus often has a "long form in the optical axis direction of the imaging lens". In such a case, when the image display device is used on a desk as a desktop type, if the optical axis direction of the imaging lens is set to be parallel to or close to the desk surface, a considerable area portion of the desk surface is set by the image projection device. Is taken as the “floor area” of the image display device, but as in the embodiment of FIG. 1, the screen 12 is set so as to be parallel to the optical axis of the imaging light beam emitted from the image projection device 10. When provided in the image projecting device 10, the image projecting device 10 is used in an "upright state" as shown in FIG. 1A. Therefore, when the image display device of FIG. There is an effect that the area occupied on the surface can be small.

FIG. 2 is a view for explaining an embodiment of the image display apparatus according to the present invention. In order to avoid complication, the same reference numerals as those in FIG. 1 are used for those which do not seem to be confused. That is, the portions denoted by the same reference numerals as those in FIG. 1 have the same configuration as in the embodiment of FIG.

Therefore, the screen 12, the optical path forming attachment 14, and the image projection device 10 as the "optical image reflector" are the same as those described with reference to the embodiment shown in FIG. In FIG. 1A, reference numeral 110 denotes an “image projection device holder”. As shown in FIG. 2, a screen 12
And the base support portion 14A of the optical path forming attachment 14
Are integrated.

As shown in FIG. 2, the image projecting device 10 displays the image projecting device required holder 110 such that “the direction of the image forming light beam emitted from the image forming lens is parallel to the longitudinal direction of the rod-like support 141”. So that it is kept. An image forming light beam is emitted from the held image projection device 10, and the rod-shaped supports 141 to 148 of the optical path forming attachment 14 and the held mirror M <b> 1 are operated by the same operation as in the embodiment shown in FIG. 1. , M2, an image of a desired size can be projected and displayed on the screen 12 by forming a bent optical path reaching the screen 12.

In the embodiment described above with reference to FIG. 2, the screen 12 and the optical path forming attachment 14 are provided integrally with the image projection apparatus holder 110 (claim 10). The screen and the “optical path forming attachment” may be detachable from the image projection apparatus holder 110 (claim 9). Making the screen 12 and the attachment for forming an optical path detachable from the holder 110 for the image projection apparatus is convenient when, for example, the screen becomes dirty, it is replaced with a “clean screen”.

Also in the embodiment shown in FIG. 2, the screen 12 as the "light image reflector" is so arranged that the screen 12 is "parallel to the optical axis of the image forming light beam emitted from the image projecting device 10". It is held by the holder 110 (claim 14).
Therefore, the image projection apparatus 10 is used in the "standing state" as shown in FIG. 1A, and when the image display apparatus of FIG. 2 is used on a desk, the area occupying the desk is small. Yes.

In the embodiment shown in FIG. 1, the screen 12 and the base support 1 of the attachment for forming an optical path are provided.
4 are provided on the image projecting device 10 so as to sandwich the image projecting device 10 in the thickness direction. However, the present invention is not limited to such an embodiment. On the side surface to be formed ". Similarly, when the image projection device holder is used, as shown in FIG. 2, the image projection device holder 110 is sandwiched between the screen 12 and the base support portion 14A of the optical path forming attachment in the thickness direction. The holder 110 for the projection device may be provided, or the base support portion 14A may be provided on the “side surface portion forming the thickness” of the holder 110 for the image projection device.

Here, as an example of the image projection device, 3 "plate type liquid crystal color projector" will be briefly described. FIG.
As shown in (1), white light from the light source side (the infrared component is removed) is reflected by the dichroic filter D1 to reflect the red component light, and is reflected by the dichroic filter D2 to reflect the green component light. The red component light reflected by the dichroic filter D1 is reflected by the mirror M5, enters the liquid crystal panel PR, and transmits the same. On the liquid crystal panel PR, an “image of a red component of a display image” is formed with a distribution of transmissive pixels, and light transmitted through the liquid crystal panel PR is two-dimensionally spatially modulated by the red component image. .

The green component light reflected by the dichroic filter D2 enters the liquid crystal panel PG and passes therethrough. The liquid crystal panel PG displays the image of the green component of the display image.
Are formed, and the light transmitted through the liquid crystal panel PG is two-dimensionally spatially modulated by the image of the green component. The blue component light transmitted through the dichroic filter D2 is reflected by the mirrors M3 and M4 and “the blue component image of the display image”
Are spatially modulated by transmitting through the liquid crystal panel PB on which is formed.

As described above, the spatially modulated light beams transmitted through the liquid crystal panels PR, PG, and PB as "light spatial modulation elements" are combined by the dichroic prism PZ.
The light is projected as an image forming light beam onto an optical image reflector such as a screen via the image forming lens 10B.

FIG. 4 shows a characteristic portion of the image display device according to the fifteenth aspect of the present invention. In FIG. 4, the liquid crystal panel PN (the above-described liquid crystal panel P
R, PG, and PB) have pointer light sources PS1, PS2, PS3, and PS4 formed by semiconductor lasers at the four corners.
Is provided. Pointer light sources PS1, PS2, PS
3 and PS4 are swingable arms AM1 and AM, respectively.
Arm AM2
1, AM2, AM3, and AM4 are arranged in a position indicated by a solid line (at this time, the pointer light source PS) by an appropriate mechanism (not shown).
1, PS2, PS3, and PS4 are located at the four corners of the image display area PNG of the liquid crystal panel PN and the positions indicated by broken lines (at this time, the pointer light sources PS1, PS2, PS3, and PS4).
Is retracted from the image display area PNG of the liquid crystal panel PN).

When displaying an image, the pointer light source PS
1, PS2, PS3, and PS4 are caused to emit light in the “position shown by the solid line”. Then, on the imaging plane of the imaging lens,
Since the images of the pointer light sources are formed, the optical path length and the directions of the anti-slope surfaces of the mirrors M1 and M2 are adjusted while observing the position of the image of the pointer light source on the screen, and the image is adjusted to an appropriate position on the screen. Make adjustments to account for it. After this adjustment is completed, each pointer light source is turned off, retracted to the "position shown by the broken line", and the display image is projected, so that the display image can be projected and displayed at an appropriate position on the screen. Adjustment operation becomes easy.

FIG. 5 is a diagram for explaining another embodiment of the image display device of the present invention. To avoid complication, the same reference numerals as in FIG. 1 are used in FIG.

In FIG. 5A, an image projection device 10 is provided on the back side of a screen 12 as an “optical image reflector”, and emits an image-forming light beam downward of the screen 12. It has become. A support shaft 32 is passed between the two support blocks 31A and 31B that support the screen 12, and the mirror M1 can swingably adjust the direction of the reflection surface about the support shaft 32 on the support shaft 32. So as to reflect an image forming light beam from the image projecting apparatus 10.

The support shaft 32 is also engaged with the bending engagement pieces 40A, 40B of the support plate 40, and the support plate 40 is connected to the support shaft 32.
Can be swung around. The free end side of the support plate 40 serves as a holding portion 41 that holds the slide member 42 and determines the “sliding direction”. Slide member 4
One end of 2 is bent at a substantially right angle to form a bent piece 42, and a fastening screw 43 is provided on the bent piece 42A.

The fastening screw 43 has a long hole 44 of a support piece 44.
A, and as shown in FIG.
Is screwed. A mirror M2 is provided above the support piece 44,
It is provided so that the direction of the reflection surface can be adjusted.
In the range, the vertical position of the mirror M2 can be adjusted, and the direction of the reflection surface of the mirror M2 can be adjusted.

In the embodiment shown in FIG. 5, the "optical path forming attachment" for forming an image forming optical path for guiding the image forming light beam from the image projecting device 10 to the screen 12 includes support blocks 31A and 31B and a support shaft. 32 and mirrors M1, M
2, a support plate 40, a slide member 42, a support piece 44, a long hole 44A, a fastening screw 43 and a fastening screw 43A. The adjustment of the optical path length is mainly performed by sliding the slide member 42.

When the image projecting apparatus 10 is capable of displaying the input contents of the keyboard as an image, as shown in FIG. 5C, the bent piece 42 of the slide member is arranged so as to be close to or close to the keyboard 50. I do. Support piece 4
4 and the mirror M2 are located above the keyboard 50 so as not to hinder the keyboard operation of the keyboard operator, thereby securing an optical path length. In this manner, the input contents of the keyboard 50 can be displayed on the screen 12.

FIG. 5B shows the state of the image display device shown in FIG. As shown in the figure, it can be stored without taking up space in a compactly folded state.

In FIG. 5, if the image projecting device 10 is replaced with an "image projecting device holder", FIG. 5 shows an embodiment of the "image display device attachment" of the present invention. In the embodiment as shown in FIG. 5, the attachment for forming the optical path is provided on the image projection device or the holder for the image projection device via the screen 12. The "providing the attachment for forming on the image projecting device or the holder for the image projecting device" means that the attachment for forming the optical path is provided on the image projecting device or the holder for the image projecting device via the screen as described above, or conversely, This also includes providing the reflector on the image projection device or the image projection device holder via the optical path forming attachment.

[0062]

As described above, according to the present invention, a novel image display device and an attachment for the image display device can be realized.

As described above, the image display device of the present invention
The image projected by the image projection device can be displayed at a desired magnification within the range of the size of the light image reflector without exchanging the light image reflector such as a screen, so that the usability is good.
In addition, since the optical image reflector, the optical path forming attachment, and the image projection device can be compactly assembled, storage and transportation are easy, and storage management is easy. Further, unlike a display using a CRT or the like, the image projection apparatus generates less electromagnetic waves, which are recently being influenced on the human body.

As described above, the attachment for an image display device of the present invention holds an image projection device in a holder for the image projection device so that the image projected by the held image projection device can be reflected by a light image reflector such as a screen. Can be displayed at a desired magnification within the range allowed by the size of the light image reflector without exchanging the image data. Further, since the optical image reflector, the attachment for forming the optical path, and the holder for the image projecting device can be compactly assembled, storage and transportation are easy, and storage management is easy.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an embodiment of an image display device of the present invention.

FIG. 2 is a view for explaining an embodiment of the attachment for an image projection apparatus according to the present invention;

FIG. 3 is a diagram illustrating an optical system configuration of a three-plate type color image projector which is an example of the image projection apparatus.

FIG. 4 is a diagram for explaining a characteristic portion of one embodiment of the invention described in claim 15;

FIG. 5 is a diagram for explaining another embodiment of the image display device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Image projection apparatus 12 Screen which is an example of an optical image reflector 14 Attachment for optical path formation M1, M2 Mirror

Claims (15)

[Claims] An image projection apparatus for emitting a light beam two-dimensionally modulated by one or more light spatial modulation elements in which pixels for controlling transmission or reflection of light are two-dimensionally arranged as an image forming light beam. An optical image reflector provided in the image projecting device; and an optical path forming device provided in the image projecting device for forming an image forming optical path for guiding an image forming light beam from the image projecting device to the optical image reflector. An optical path-forming attachment, the optical path-forming attachment being configured to change and adjust an optical path length of an imaging light flux from the image projection device to an optical image reflector provided in the image projection device; An image display device comprising: two mirrors for bending an optical path of an image light beam. 2. The image display device according to claim 1, wherein the optical image reflector and the optical path forming attachment are detachable from the image projection device. 3. The image display device according to claim 1, wherein the optical image reflector and the optical path forming attachment are provided integrally with the image projection device. 4. The image display apparatus according to claim 1, wherein the attachment for forming an optical path comprises: two or more rod-shaped supports connected in series with each other; A mirror support comprising a joint member for connecting the rod-shaped supports to be able to bend with each other; two mirrors provided on the mirror support so that the direction of the reflection surface can be adjusted; and the mirror support An image display device, comprising: a base support portion for supporting the base portion of (1), wherein a rod-shaped support structure between the two mirrors in the mirror support is extendable and contractible. 5. The image display device according to claim 4, wherein the rod-shaped support structure forming the base of the mirror support is extendable. 6. The image display device according to claim 4, wherein the base support portion houses at least a part of a rod-shaped support structure serving as a base of the mirror support. 7. The image display device according to claim 1, wherein the light image reflector is arranged so that the light image reflector is parallel to an optical axis of an image forming light beam emitted from the image projection device. An image display device provided in the device. 8. An image projection apparatus which emits, as an imaging light beam, a light beam two-dimensionally modulated by one or more spatial light modulators in which pixels for controlling transmission or reflection of light are two-dimensionally arranged. An image projection device holder to be held, an optical image reflector provided in the image projection device holder, and an imaging light flux from the image projection device held in the image projection device holder guided to the optical image reflector And an optical path forming attachment provided on the image projecting device holder to form an image forming optical path for the image projecting device, wherein the optical path forming attachment is an optical image provided on the image projecting device holder from the image projecting device. An image display apparatus comprising: an optical path length adjusting means for changing and adjusting an optical path length of an image forming light flux reaching a reflector; and two mirrors for bending an optical path of the image forming light flux. Chimento. 9. An attachment for an image display device according to claim 8, wherein the light image reflector and the attachment for forming an optical path are detachable from a holder for the image projection device. attachment. 10. An attachment for an image display device according to claim 8, wherein the optical image reflector and the attachment for forming an optical path are provided integrally with a holder for the image projection device. attachment. 11. An attachment for an image display device according to claim 8, wherein the attachment for forming an optical path comprises: two or more rod-shaped supports connected in series with each other; A mirror support comprising a joint member for connecting adjacent rod-shaped supports so as to be able to bend with each other; two mirrors provided on the mirror support so that the direction of the reflection surface can be adjusted; An image display device attachment, comprising: a base support portion that supports a base portion of a support, wherein a rod-shaped support structure between two mirrors in the mirror support is expandable and contractable. 12. The attachment for an image display device according to claim 11, wherein a rod-shaped support structure serving as a base of the mirror support is extendable and contractible. 13. The image display device according to claim 11, wherein the base support portion houses at least a part of a rod-shaped support structure forming a base of the mirror support. Attachment for device. 14. An attachment for an image display device according to any one of claims 8 to 13, wherein the light image reflector is formed of an image light beam emitted from the image projection device held by the image projection device holder. An attachment for an image display device, which is provided in the holder for the image projection device so as to be parallel to an optical axis. 15. The image display device according to claim 1, wherein said image projection device includes a pointer light source for indicating an image forming area of a display image.