JPH09258134A - Projection optical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate aligning work of a display image for a screen by provided a processing unit adjustment mechanical part simultaneously moving resultant synthesized light emitted from an optical unit by the same amount in the direction making the light coaxial. SOLUTION: In the projection optical device 3, three liquid crystal units 124-1 -124-3 are reciprocally moved simultaneously by the same amount in the direction of the arrow X by operating a first DC motor 32, and e.g. such as the liquid crystal units 124-1 , 124-2 in the direction of the arrow Y, and the liquid crystal unit 124-3 in the direction of the arrow Z, are reciprocally moved by the same amount in the direction orthogonally crossed with respective optical axes by operating a second DC motor 367. Thus, by simultaneously operating the first DC motor 32 and the second DC motor 367, respective liquid crystal unit 124-1 -124-3 are reciprocally moved simultaneously by the same amount in the two-dimensional direction in the surface orthogonally crossing the optical axis. Thus, the color blur and the distortion of the image due to positional deviation are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention divides light from a light source into three primary colors into parallel light fluxes, performs a required process, synthesizes them, and projects them on a predetermined screen in an enlarged manner, as in a projector in the field of liquid crystal displays. The present invention relates to a projection type optical device for color, and particularly to a projection type optical device for changing the image display position by constructing the projection type optical device so that the image display position on the screen can be easily changed. Regarding the device.

[0002]

2. Description of the Related Art FIG. 11 is a diagram showing a configuration example of a conventional projection type optical device, and FIG. 12 is a diagram illustrating a configuration example of another conventional projection type optical device.

In the following text, the case where the projection type optical device is a liquid crystal color display projector will be taken as an example. Therefore, the processing unit for processing the three primary colors will be described as a liquid crystal unit.

In order to distinguish between the projection type optical devices in FIGS. 11 and 12, the device of FIG. 11 is referred to as the projection type optical device (A) and the device of FIG. 12 is referred to as the projection type optical device (B). ).

In FIG. 11, the projection type optical apparatus (A) 1 is roughly classified into a light source section 11 surrounded by a one-dot chain line A, an optical system 12 surrounded by a one-dot chain line B and a projection lens surrounded by a one-dot chain line C. The part 13 and the main part are configured.

The internal light source unit 11 comprises a reflector 111 such as a parabolic mirror and a light source 112 such as a metal halide lamp positioned at its focal point. All the light emitted from the light source 112 in the reflector direction is reflected by the reflector 111. After being reflected by the light source 11, a parallel light beam L'is emitted from the light source unit 11.

A light-shielding portion 112a is formed at the apex region on the optical system side of the light source 112 so that at least direct light from the light source cannot reach the optical element in the optical system facing the light source. It has become.

The optical system 12 also directs the parallel light flux L'from the light source unit 11 into first and second dichroic mirrors 121 _-1.
When 121 is guided to _-2 R, G, and separated into three primary colors of B, then the three primary colors for a liquid crystal panel as the projection body located on the respective three primary color rays 122 _-1, 122 _-2, 122 _- in ₃ to modulate the respective color light intensities third and fourth dichroic mirrors 12
A parallel light flux L ″ that is color-synthesized by 1 _-3 and 121 _-4 is led out from the optical system 12, passes through a projection lens 13, and then a screen 14
It is designed to be projected on.

The above liquid crystal panels 122 _-1 , 122 _-2 , 122
_-3 is a condenser lens 123 _-1 , 123 _-2 2,123 corresponding to each
_The liquid crystal units 124 _-1 , 124 _-2 , and 124 _-3 are integrated as a pair with _-3 .

Further, 125 _-1 and 125 _{-2 in the} figure are mirror plates for guiding light in a predetermined direction. On the other hand, the projection type optical device (B) 2 in FIG. 12 which describes another projection type optical device is described with reference to the light source section 11 described in FIG. 11, the optical system 21 surrounded by the one-dot chain line B, and three FIG. It is composed of the projection lens unit 13 described above.

In particular, the optical system 21 in this case guides the parallel luminous flux L'from the light source unit 11 to the first and second dichroic mirrors 121 _-1 and 121 _-2 , and the three primary colors of R, G and B. A parallel light flux L ″ which is decomposed into light and then the intensity of each color light is modulated by the liquid crystal units 124 _-1 , 124 _-2 , 124 _-3 for three primary colors as the projection object located on the optical axes of the three primary colors. The projection lens 13 _-1 , 13 _-2 , 13 _-3 located on each optical axis.
After that, the images are projected and synthesized on the screen 14.

Reference numeral 125 in the drawing is a mirror plate for guiding light in a predetermined direction. Projection type optical device (A) having such a configuration
1 and the projection-type optical device (B) 2, the light source unit 11 and the optical system 12, 2
Since the 1 and the projection lens unit 13 are arranged in a state of being integrated with the housing, it is possible to easily position them on the screen 14 by surely positioning the optical elements such as the dichroic mirror, the liquid crystal unit and the mirror plate described above. There is an advantage that can be projected on.

[0013]

However, in such conventional projection type optical devices (A) and (B), if the image display position on the screen is vertically or horizontally displaced with respect to the screen, for example, the vertical direction The deviation can be corrected by adjusting the installation angle (tilt) of the device by adjusting the foot length of the optical device itself, and the deviation in the horizontal direction can be adjusted by shifting the device in the horizontal direction. The entire device needs to be moved to adjust the position with respect to the screen.

Therefore, these adjustment operations tend to cause the trapezoidal distortion of the display image on the screen and defocus, and the workability of the adjustment operations when the apparatus is large or installed in a narrow place. There was a problem that there would be difficulties.

[0015]

The above-mentioned problems are solved by the light source unit for emitting a light beam from a light source and the first dichroic mirror arranged on the optical axis of the light beam, and the light beam is divided into a first primary color light and two primary color lights. The light beam consisting of two primary color lights is separated into the second primary color light and the third primary color light by the second dichroic mirror arranged on the optical axis. A first dichroic mirror that arranges the first primary color light and the third primary color light at an optical axis intersection point is used as combined light, and the combined light and the second primary color light are arranged at respective optical axis intersection points. And an optical unit for combining by the dichroic mirror of No. 4, and arranged on each of the separated first primary color optical axis, second primary color optical axis and third primary color optical axis. Emitting from the processing unit that performs the required processing for each primary color light and the above optical unit A projection lens unit for projecting the processed light flux onto a screen, and at least a housing, and the combined light emitted from the optical unit is coaxial in a plane orthogonal to the optical axis of each processing unit. This is solved by a projection type optical device including a processing unit adjusting mechanism section that simultaneously moves the same amount in the direction in which the processing unit is moved.

A light source section for emitting a light beam from a light source,
The light beam is split into a light beam of a first primary color light and a light beam of two primary color lights by a first dichroic mirror arranged on the optical axis of the light beam, and the light beam of two primary color lights is placed on the optical axis. An optical unit that separates the second primary color light and the third primary color light by the second dichroic mirror and separates them into three primary color lights aligned in parallel in the same plane; At least a housing is provided with a processing unit that is disposed on the top and performs a required process for each primary color light, and a projection lens unit that is disposed on the optical axis of each primary color light emitted from each processing unit and projects on the screen. And a processing unit adjusting mechanism for simultaneously moving the processing units in the same direction in a plane orthogonal to the respective optical axes by the same amount. Solved by .

Generally, when the liquid crystal unit located on the optical axis is moved in a two-dimensional direction in a plane orthogonal to the optical axis, the image display position is moved in a direction corresponding to the moving direction of the liquid crystal unit. be able to.

Therefore, in the present invention, the above-mentioned projection type optical device is provided.
A projection type optical device is provided so that each of the three liquid crystal units in (A) and (B) can simultaneously reciprocate while maintaining a relative positional relationship in a two-dimensional direction in a plane orthogonal to the optical axis by an electric signal. I am configuring.

This eliminates the need to move the entire device for aligning the display image with the screen, and causes color shift, distortion, defocusing, etc. of the display image due to relative displacement between the three liquid crystal units. Is not generated.

Therefore, the work of aligning the display image on the screen can be realized by an electric signal, and as a result, it is possible to expect an improvement in productivity due to an improvement in workability in the aligning work.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a projection type optical device of the present invention.
FIG. 2 is a schematic diagram illustrating the configuration of (A), FIG. 2 is a diagram illustrating a semi-finished optical device before the liquid crystal unit adjusting part is mounted, FIG. 3 is a diagram illustrating a liquid crystal unit adjusting mechanism part, and FIG. 4 is a liquid crystal unit. The block diagram explaining the 1st adjustment part of an adjustment mechanism part, FIG.
Is a diagram illustrating a completed state of the first adjusting unit, FIG. 6 is a configuration diagram illustrating a second adjusting unit of the liquid crystal unit adjusting mechanism unit, and FIG. 7 is a diagram illustrating a completed state of the second adjusting unit. is there.

FIG. 8 is a schematic diagram for explaining the structure of the projection type optical device (B) of the present invention, FIG. 9 is a diagram for explaining the semi-finished optical device before mounting the liquid crystal unit adjusting mechanism, and FIG. It is a figure explaining a liquid crystal unit adjustment mechanism part with composition.

In each of the drawings, the case where the invention is applied to the projection type optical devices (A) and (B) described in FIGS. 11 and 12 is taken as an example. Are denoted by the same symbols, and duplicate explanations are omitted.

FIG. 1 shows a projection type optical device (A) 3 according to the present invention.
Is composed of a semi-finished optical device 31 and a liquid crystal unit adjusting mechanism portion 35 mounted on the semi-finished optical device 31. Therefore, for easy understanding, first, the semi-finished optical device 31 will be described with reference to FIG. 2, and the liquid crystal unit adjusting mechanism portion 35 will be described with reference to FIGS.

In FIG. 2 showing the semi-finished optical device 31, (2-1) is a perspective view showing the external appearance, and (2-2) is a side view showing the arrangement of the optical elements. In Figure 2, the semi-finished optical device 31
11 is constructed by disposing and fixing the light source unit 11 described with reference to FIG. 11, the optical unit 12 ′ according to the present invention and the projection lens unit 13 described with reference to FIG.

[0026] The optical unit 12 'in this case, the liquid crystal from the optical system 12 in FIG. 11 of the three units 124 _-1, 1
The remaining 1st to 4th dichroic mirrors 121 _-1 , 121 _-2 , 121 _-3 , 121 _-4 with 24 _-2 , 124 _-3 removed and two mirror plates 125 _-1 , 125 _-2 The optical system 12 is mounted and fixed to the housing 311 so as to be located at the same position as the optical system 12.

On one side surface of the housing 311, the three liquid crystal units 124 _-1 , 124 of the optical unit 12 'are provided.
_{-2,124 -3} Opening window large enough to allow the liquid crystal unit to pass through together with its holder in the area corresponding to the position.
311a is formed.

A first DC motor is arranged on the front surface of the housing 311 on the projection lens side and near the lower side of the projection lens portion 13 so that the rotation axis is perpendicular to the wall surface of the housing. 32
However, for example, it is mounted in a state of being floated from the wall surface by a stay 34 or the like, and a gear 33 is fixed to a position of the rotating shaft near the housing wall surface.

On the other hand, the liquid crystal unit adjusting mechanism 35 shown in FIG.
Is roughly composed of a first adjusting unit 36 and a second adjusting unit 37 which is mounted on the adjusting unit 36 so as to be movable along the first adjusting unit 36.

The first adjusting section 36 is, as shown in FIG.
The first adjusting plate 361 has a substantially L-shaped front view when viewed from the direction of arrow A, and a housing mounting piece 361a formed on a part of the outer side of the vertical piece and bent to the back side (right side in the drawing). And the first
The liquid crystal unit complete body 363 mounted along the inner side of the vertical piece of the adjusting plate 361 is used as a main member.

The first adjusting plate 361 has a rack plate 362 arranged on the housing mounting piece 361a such that a rack 362a meshing with the above-mentioned gear 33 projects from the upper end side of the housing mounting piece 361a. Is mounted, and a slit 361b parallel to the lower side of the mounting piece 361a is formed in the vicinity of the lower side.

Further, in the vicinity of the lower end on the surface side of the vertical piece of the first adjusting plate 361, a second rotating shaft located on the adjusting plate side is arranged so as to be perpendicular to the adjusting plate 361. DC motor 367 and two idlers 369 _-1 and 369 _-2 mounted so as to mesh with a gear 368 fixed to the rotating shaft.

The completed liquid crystal unit 363 described above is
The liquid crystal unit 1 shown in FIG. 11 is placed in the area of the hole provided in one piece 364 'of the holder 364 made of an L-shaped metal plate.
Enlarged view of LCD unit 124 _-3 corresponding to 24 _-3
is fixed to as shown in (a), the rack plate 365 having a rack 365a that meshes with the idler 369 _-1 with a slit 364a along the end side said end edge in the vicinity of the other piece 364 'is formed The rack 365a is mounted so as to project from the end side.

Then, by mounting the liquid crystal unit completed body 363 on the first adjusting plate 361 by, for example, two neck screws 366 passing through the slit 364a at a position where the rack 365a meshes with the idler 369 _-1. The first adjusting unit 36 can be configured as shown in FIG.

In the first adjusting unit 36, when the second DC motor 367 is operated, the DC motor 367 is magnified as shown in the circle (a) in which the vicinity of the second DC motor 367 is enlarged.
The rotating force of the gear 368 fixed to the rotary shaft of the idler 369
Because it is transmitted to the rack plate 365 of the liquid crystal unit completed body 363 through a _-1, the DC motor 367 the liquid crystal unit completed body 363 guided by the slit 364a by operating the electric signals thus the liquid crystal unit 124 _{- 3} can be reciprocated in the vertical direction orthogonal to the optical axis as shown by arrow B.

On the other hand, as shown in FIG. 6, the second adjusting portion 37 has a substantially inverted L shape which is smaller than the first adjusting plate 361 in the front view seen from the direction of arrow A, and the tip of the vertical direction piece is laterally inside. A second adjusting plate 371 formed on the liquid crystal unit mounting piece 371a protruding in the direction, and two liquid crystal units to be mounted on the lateral piece of the second adjusting plate 371 and the liquid crystal unit mounting piece 371a. The body 373 is the main component.

[0037] The second adjustment plate 371, the rack plate 372 is the rack 372a having a rack 372a is in its liquid crystal unit completed body mounting piece 371a which meshes with the other of the idler 369 ₂ in the first adjusting portion 36 Is mounted so as to project from the upper end side of the liquid crystal unit completed body mounting piece 371a, and a slit 371b parallel to the upper side edge of the lateral piece is provided.

Further, each of the above-mentioned two liquid crystal unit completed bodies 373 has a liquid crystal unit corresponding to the liquid crystal units 124 _-1 and 124 _-2 of FIG. 11 in the area of the hole provided in one piece 374 ′ of the holder 374. As shown in FIG. 4, 124 _-1 and 124 _-2 are fixed, and a hole 374a for mounting the liquid crystal unit completed body is formed in the vicinity of the edge of the other piece 374 ″.

Then, the two liquid crystal unit completed bodies 373
One of the two is to be attached to the liquid crystal unit completed piece 371a of the second adjusting plate 371 with a screw 375 as the one corresponding to the liquid crystal unit 124 _-1 of FIG. By attaching a screw 375 to the lower end side of the vertical piece of the second adjusting plate 371 as a unit corresponding to the liquid crystal unit 124 _-2 of FIG. 11, the second adjusting portion 37 as shown in FIG. Can be configured.

In the second adjusting section 37, since the liquid crystal units 124 _-1 , 124 _{-2 of the} two liquid crystal unit completed bodies 373 are fixed to the second adjusting plate 371 in parallel with each other,
It is possible to reciprocate two liquid crystal unit completed bodies 373 at the same time by reciprocating the second adjusting plate 371, and thus the second adjusting portion 37.

The above wherein the adjustment portion 37 of the first adjusting portion 36 and the second, with the rack 372a and are engaged position of the idler 369 _-2 and the second adjusting portion 37 of the first adjusting portion 36 slit
The liquid crystal unit adjustment mechanism section 35 shown in FIG. 3 can be configured by attaching to the first adjustment section 36 by, for example, two screws with neck 366 passing through 371b.

In the liquid crystal unit adjusting mechanism section 35, the second DC motor 367 is operated so that the rotation of the gear 368 fixed to the rotating shaft thereof causes the two idlers 369 _-1 and 3 to rotate.
LCD unit by rack plate 365 through 69 _-2 124 _-3
The vertical reciprocating movement of the two liquid crystal units 124 _-1 and 124 _-2 by the rack plate 372 can be realized at the same time.

Further, the semi-finished optical device 31 described in FIG. 2 and the liquid crystal unit adjustment mechanism portion 35 described in FIG. 3 are provided with a rack 362a in the liquid crystal unit adjustment mechanism portion 35 and a gear 33 in the semi-finished optical device 31. 1 is engaged with each other by engaging with, for example, two neck screws 366 passing through the slit 361b of the liquid crystal unit adjusting mechanism portion 35, so that the required projection type optical device (A) 3 shown in FIG. Can be configured.

In the projection type optical apparatus 3, the first DC motor 32 is operated to simultaneously reciprocate the three liquid crystal units 124 _-1 to 124 _-3 in FIG. 11 by the same amount in the arrow X direction. At the same time, by operating the second DC motor 367, for example, the liquid crystal units 124 _-1 , 124 _-2 are in the Y direction shown by the arrow, and the liquid crystal unit 124 _-3 is in the Z direction shown by the arrow. It is possible to reciprocate the same amount at the same time in the direction orthogonal to the optical axis.

Therefore, by simultaneously operating the first DC motor 32 and the second DC motor 367, the respective liquid crystal units 124 _-1 to 124 _-3 in FIG. 11 are simultaneously moved in the plane orthogonal to the optical axis by the same amount. Since it can be reciprocated in the two-dimensional direction, it does not move the entire projection-type optical device and does not cause color deviation, distortion, defocusing, etc. of the displayed image due to relative positional deviation between the three liquid crystal units. It is possible to realize a projection type optical device which can realize the position alignment of the display image with respect to the screen.

On the other hand, another projection type optical device (B) 4 according to the present invention shown in FIG. 8 comprises a semi-finished optical device 41 and a liquid crystal unit adjusting mechanism portion 45 mounted on the semi-finished optical device 41. .
Therefore, similarly to the projection type optical device (A) 3 described above, first, the semi-finished optical device 41 will be described with reference to FIG. 9, and the liquid crystal unit adjusting mechanism portion 45 will be described with reference to FIG.

In FIG. 9 showing the semi-finished optical device 41, (9-1) is a perspective view showing the external appearance, and (9-2) is a side view showing the arrangement of the optical elements. Figure of semi-finished optical device 41
The light source unit 11 described with reference to FIG. 12, the optical unit 21 ′ according to the present invention, and the projection lens unit 13 described with reference to FIG.
It is configured by being internally arranged in the integrated housing 411.

[0048] The optical unit 21 when 'the liquid crystal unit from the optical system 21 in FIG. 12 of the three 124 _-1, 1
The remaining two first and second dichroic mirrors 121 _-1 , 121 _-2 with the mirrors 24 _-2 , 124 _-3 removed and the mirror plate 125 are placed at the same position as the optical system 21. Body 411
It is fixed to.

On one side surface of the casing 411, the optical system
3 liquid crystal units in 21 _-1, 124_-2, 124_-3 of
The liquid crystal unit is located in almost the area corresponding to the arrangement position.
Almost rectangular shape that is large enough to pass with the holder
Is formed with an opening window 411a.

Further, in the vicinity of the side of the opening window 411a on the side of the projection lens, a first DC motor 412 arranged so that its rotation axis is perpendicular to the wall surface of the housing has been described with reference to FIG. It is mounted in a state of being floated from the wall surface by a stay or the like, and a gear 413 is fixed to a position of the rotary shaft near the housing wall surface.

In the vicinity of the first DC motor 412, 2
The individual idlers 414 _-1 , 414 _-2 are mounted so as to mesh with the gear 413, and each of the idlers 414 _-1 , 414 _-2 is coaxially formed with a feed screw 414a.

Further, guide pins 415 are fixed in an upright state at two locations near the periphery of the opening window 411a. In FIG. 10 for explaining the configuration of the liquid crystal unit adjusting mechanism section, the liquid crystal unit adjusting mechanism section 45 has the first adjusting section 46 and (1
0-2) and a second adjusting section 47.

That is, in (10-1) of the figure, the first adjusting unit 46
The first adjusting plate 461, which is substantially rectangular in a plan view and whose width dimension is narrower than the width of the opening window 411a in the housing 411 and whose length is longer than the opening window 411a, is a main member.

One side of the adjusting plate 461 (the upper side in the figure)
A second DC motor 462 arranged so that its rotation axis is perpendicular to the adjusting plate is mounted in a region along the long side of one side in a state of being floated from the wall surface by, for example, the stay described in FIG. Further, a gear 463 is fixed at a position near the wall surface of the casing of the rotating shaft.

In the vicinity of the gear 463, the gear 463
An idler 464 that meshes with is installed. Further, when the first adjusting plate 461 is made to correspond to the opening window 411a of the housing 411, a sleeve 465 having a female screw meshing with the feed screw 414a is formed at each position corresponding to the feed screw 414a. A guide hole 461a that fits into the guide pin 415 is formed at a position corresponding to the guide pin 415 described in FIG.

On the other hand, in (10-2) of the figure, the second adjusting portion 47 has a substantially rectangular second width and length smaller than those of the first adjusting plate.
The adjusting plate 471 and the three liquid crystal unit completed bodies 373 described in FIG. 6 are the main members.

One side of the adjusting plate 471 (the upper side in the figure)
A rack plate 472 having a rack 472a engaging with the idler 464 at a position corresponding to the idler 464 provided on the first adjusting plate 461 is provided in a region along one long side of the rack 472.
72a is mounted so that it projects from the long side above,
A slit 471a is formed along the long side.

Further, on the other long side of the adjusting plate 471, as shown in FIG.
The completed liquid crystal unit 373 described in 1 above is mounted at a pitch equal to the arrangement pitch between liquid crystal units in FIG.

Therefore, the second adjusting section 47 is attached to the rack 4
72a and the above-mentioned idler 464 of the first adjusting portion 46 are mounted on the first adjusting portion 46 at a position where they mesh with each other, and then the neck screw 366 passing through the slit 471a provided in the second adjusting portion 47 By attaching the second adjusting section 47 to the first adjusting section 46, the liquid crystal unit adjusting mechanism section 45 can be configured as shown in (10-3).

In the liquid crystal unit adjusting mechanism unit 45, the second adjusting unit is operated by operating the second DC motor 462 to transmit the power to the rack 472a via the idler 464.
47 can be reciprocated in the direction along the slit 471a with respect to the first adjusting portion 46, that is, in the E direction in the drawing, but three liquid crystal unit completed bodies 373 are fixed to the second adjusting portion 47. Therefore, the completed liquid crystal units 373, and thus the liquid crystal units 124 _-1 to 124 _-3 in FIG. 12 can be simultaneously reciprocated while maintaining the relative positional relationship.

Further, the semi-finished optical device 41 described with reference to FIG. 9 and the liquid crystal unit adjustment mechanism portion 45 described with reference to FIG. 10 are provided with a guide pin 415 in the semi-finished optical device 41 and a guide hole of the liquid crystal unit adjustment mechanism portion 45. 461a with the semi-finished optical device 41 in the fitted state, the feed screw 44a is attached to the first DC motor 41.
When the liquid crystal unit adjusting mechanism portion 45 is rotated by 2 to engage with the semi-finished optical device 41, the required projection type optical device (B) 4 shown in FIG. 8 can be constructed.

In the projection type optical apparatus 4, when the first DC motor 412 is operated, the feed screw 44a that meshes with the gear 413 of the first screw and the rotation of the feed screw 44a and the sleeve 465 of the first adjusting unit 46 described above are shown. The three liquid crystal unit completed bodies 373 corresponding to the three liquid crystal units 124 _-1 to 124 _-3 in 12 can be simultaneously reciprocated in the arrow X direction by the same amount.

Further, by operating the second DC motor 462, it is possible to simultaneously reciprocate the three liquid crystal unit completed bodies 373, and consequently the liquid crystal units 124 _-1 to 124 _-3 , in the arrow Z direction by the same amount. .

Therefore, by operating the first DC motor 412 and the second DC motor 462, the liquid crystal units 124 _-1 to 124 _-3 in FIG. 12 are simultaneously moved in the two-dimensional direction orthogonal to the optical axis by the same amount. Since it can be reciprocated, the position of the display image with respect to the screen can be adjusted without moving the entire device and without causing color shift, distortion, defocus, etc. of the display image due to relative position shift between the three liquid crystal units. It is possible to realize a projection type optical device that can realize the adjustment.

[0065]

As described above, according to the present invention, there is no need to move the entire apparatus and to prevent color deviation, distortion, defocusing, etc. of a display image due to relative positional deviation between three liquid crystal units. It is possible to provide a projection-type optical device that can easily perform the work of aligning the display image with the screen.

In the description of the present invention, the case where the projection type optical device is a projector in the field of liquid crystal displays is taken as an example, but it may be an optical device that separates the light emitted from the light source into three primary colors and performs the required processing. Obviously, the processing unit can be applied to any device other than the liquid crystal unit with the same effect.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating the configuration of a projection optical apparatus (A) of the present invention.

FIG. 2 is a diagram illustrating a semi-finished optical device before the liquid crystal unit adjusting mechanism is attached.

FIG. 3 is a diagram illustrating a liquid crystal unit adjustment mechanism section.

FIG. 4 is a configuration diagram illustrating a first adjustment unit of a liquid crystal unit adjustment mechanism unit.

FIG. 5 is a diagram illustrating a completed state of a first adjusting unit.

FIG. 6 is a configuration diagram illustrating a second adjustment unit of the liquid crystal unit adjustment mechanism unit.

FIG. 7 is a diagram illustrating a completed state of a second adjusting unit.

FIG. 8 is a schematic diagram illustrating the configuration of a projection type optical device (B) of the present invention.

FIG. 9 is a diagram illustrating a semi-finished optical device before the liquid crystal unit adjusting mechanism is mounted.

FIG. 10 is a diagram for explaining the liquid crystal unit adjusting mechanism together with the configuration.

FIG. 11 is a diagram showing a configuration example of a conventional projection type optical device.

FIG. 12 is a diagram illustrating a configuration example of another conventional projection optical device.

[Explanation of symbols]

3,4 Projection type optical device 11 Light source part 12 ', 21' Optical unit 13 Projection lens part 31,41 Semi-finished optical device 32,412 First DC motor 33,368,413,463 Gear 34 Stay 35,45 Liquid crystal unit adjusting mechanism part 36,46 1st adjustment part 37,47 2nd adjustment part 121 _-1 to 121 _-4 1st to 4th dichroic mirror 124 _-1 to 124 _-4 Liquid crystal unit (processing unit) 125 _-1 , 125 _-2 Mirror plate 311,411 Enclosure 311a, 411a Open window 361,461 1st adjustment plate 361a Enclosure mounting piece 361b Slit 362,365,372,472 Rack plate 362a, 365a, 372
a, 472a Rack plate 363,373 Completed LCD unit 364,374 Holder 364a
Slit 366 Neck screw 367,462 Second DC motor 369 _-1 , 1,369 _-2 , 414 _-1 ,, 414 _-2 , 464 Idler 374a Mounting hole 371,471 Second adjusting plate 371a
k Liquid crystal unit mounted 371b, 471a Slit 375 Screw 414a Feed screw 415 Guide pin 461a Guide hole 465 Sleeve

Claims (5)

[Claims] 1. A light source unit for emitting a light beam from a light source, and a first dichroic mirror arranged on the optical axis of the light beam for separating the light beam into a light beam composed of a first primary color light and two primary color lights. The light flux composed of the two primary color lights is separated into a second primary color light and a third primary color light by a second dichroic mirror arranged on the optical axis, and then the first primary color light and the first primary color light are separated from each other. Three
An optical unit that combines the primary color light with the second dichroic mirror with the third dichroic mirror arranged at the optical axis intersection, and combines the combined light with the second primary color light with the fourth dichroic mirror arranged at each optical axis intersection. And disposed on the separated first primary color light optical axis, on the second primary color light optical axis, and on the third primary color light optical axis, respectively, to perform required processing for each primary color light. A processing unit and a projection lens unit for projecting a processed light beam emitted from the optical unit onto a screen are fixed to at least a housing, and each processing unit is arranged in a plane orthogonal to each optical axis. A projection-type optical device comprising: a processing unit adjusting mechanism section that simultaneously moves the combined light emitted from the optical unit by the same amount in a direction in which the combined light is coaxial. 2. A light source section which emits a light beam from a light source, and a light beam which is divided into a light beam composed of a first primary color light and two primary color lights by a first dichroic mirror arranged on the light beam optical axis, The light flux consisting of two primary color lights is separated into a second primary color light and a third primary color light by a second dichroic mirror arranged on the optical axis, and the three primary color lights are aligned in parallel in the same plane. An optical unit that separates each of the primary color lights, a processing unit that is disposed on the optical axis of each primary color light beam and performs the required processing for each primary color light beam, and an optical unit that is disposed on each optical axis of the primary color light beams emitted from each processing unit. And a projection lens unit for projecting on the screen, and at least the projection lens unit are fixed to the housing, and the processing unit adjustment for simultaneously moving the processing units by the same amount in the same direction in a plane orthogonal to each optical axis. It has a mechanical part Projection optical apparatus characterized by. 3. The processing unit adjusting mechanism according to claim 1, wherein only the processing unit is not mounted, and an opening window is formed in each processing unit arrangement area on one side of the housing side wall of the semi-finished optical device. A first adjusting portion mounted on the side wall in the vicinity so as to be capable of reciprocating in the penetrating direction of the opening window while partially covering the opening window, and in a state of being mounted on the first adjusting portion. A second adjusting unit mounted so as to reciprocate in a direction parallel to the third primary color light with respect to the first adjusting unit, wherein the first adjusting unit corresponds to the third primary color light. The processing unit is mounted at a position to be orthogonal to the optical axis of the third primary color light, and the second adjusting unit is provided at the respective positions corresponding to the first primary color light and the second primary color light. The processing unit is mounted so as to be orthogonal to the optical axis of the primary color light, and the second adjusting section is reciprocated. At the same time, the projection type optical device is characterized in that the processing unit mounted on the first adjusting section can reciprocate by the same amount in the direction in which the light emitted from the optical unit is made coaxial. 4. The unit adjusting mechanism according to claim 2, wherein only the processing unit is not mounted, and an opening window is formed in each processing unit placement region on one side of the housing side wall, in the vicinity of the opening window. Mounted on a side wall of the first window so as to reciprocate in a direction penetrating the opening window while partially covering the opening window.
Of the first adjusting unit and the first adjusting unit when mounted on the first adjusting unit.
Second reciprocating movement in the three primary color light alignment directions with respect to the adjusting section of
And the processing units are attached to the second adjustment unit at respective positions corresponding to the aligned three primary color light beams so as to be orthogonal to the optical axes of the respective primary color light beams. Projection optical device. 5. A projection type optical device, wherein the processing unit according to claim 1 or 2 is a liquid crystal unit.