JP2001264726A - Liquid crystal projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal projector whose brightness is enhanced and stabilized although the dimensional accuracy of components is the same as the conventional one. SOLUTION: The liquid crystal projector is provided with an illumination area adjusting means for adjusting the position and the range of the illumination area with respect to a liquid crystal panel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal projector, and more particularly, to a liquid crystal projector having a mechanism for adjusting an illumination area for a liquid crystal panel.

[0002]

2. Description of the Related Art In a conventional liquid crystal projector, when an image is displayed on a screen, it often feels dark. For this reason, brightening a display image is one of the important issues. As means for solving such problems, a liquid crystal projector using a method of improving the performance of a lamp or a liquid crystal panel has been devised.

[0003]

However, in such a method, there is a limit to the performance of the component itself, and therefore, there is a limit to improving the brightness. For this reason, it cannot be said that it is sufficient as a means for improving the brightness.

Therefore, as a means for improving brightness other than improving the performance of components, there is disclosed a technique of narrowing an illumination area for a liquid crystal panel. This technique has a certain effect in that light is concentrated in a narrow area to reduce waste of light quantity.

[0005] However, when the illumination area for the liquid crystal panel is narrowed, the display area of the liquid crystal panel must be accommodated in the illumination area, and the dimensional accuracy of individual components such as lenses and mirrors must be improved. Improving the dimensional accuracy of the parts, on the contrary, raises the problem of newly increasing the cost in terms of the yield of the parts. That is, it is necessary to improve the dimensional accuracy of the component alone and reduce the position error of the illumination area with respect to the liquid crystal panel. Moreover, considering the adaptation to mass-produced products,
The necessity of securing the production quantity causes a problem that securing the quantity of parts becomes difficult.

A first object of the present invention is to provide a liquid crystal projector in which the dimensional accuracy of parts is the same as before, and the brightness is improved and stabilized.

A second object of the present invention is to provide a liquid crystal projector with improved image quality and less color unevenness.

[0008]

According to a first aspect of the present invention, there is provided a light source section having a light source for emitting white light, and a cross section perpendicular to an optical axis for the white light emitted from the light source section. An integrator section having a predetermined number of integrators for equalizing the amount of light within the light source, a condensing section having a predetermined number of field lenses for condensing the output light from the integrator section, and disposed at a predetermined position or angle. The predetermined number of total reflection mirrors and dichroic mirrors separate or reflect the white light transmitted through the condensing portion into three color component lights of blue, green, and red, and any one of the total reflection mirror and the dichroic mirror A color light separating unit that condenses the light by a predetermined number of relay lenses disposed at a predetermined position between the color light separating unit; A liquid crystal projector comprising: a liquid crystal panel that modulates each of the light components according to the following conditions; a color light combining unit that combines the respective color component lights modulated by the liquid crystal panel; and a projection unit that projects the combined light combined by the color light combining unit. Wherein an illumination area adjusting means for adjusting the position or range of the illumination area with respect to the liquid crystal panel is provided.

[0009] In a second aspect of the present invention, in the liquid crystal projector, the illumination area adjusting means may be any one of the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens. It is a means for finely adjusting the position or angle of the selected part.

In the liquid crystal projector, the illumination area adjusting means is preferably provided in each of the field lens and the total reflection mirror, and is provided in each of the integrator and the total reflection mirror. Is preferred. Further, it is preferable that the illumination area adjusting means is provided in at least two total reflection mirrors. The light source is preferably provided.

According to a third aspect of the present invention, in the liquid crystal projector, the illumination area adjusting means may be any one of the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens. It is a means for finely adjusting the position or angle of each of two or more selected components in different directions.

When the liquid crystal projector has two or more integrators, the illumination area adjusting means is provided in each of the one integrator and the other one of the integrators. The illumination area adjustment means adjusts the one integrator by linear movement in the vertical direction, and the illumination area adjustment means according to the other one integrator adjusts the other integrator by the linear movement in the horizontal direction. It is preferable to make adjustments.

In the liquid crystal projector, when the number of the field lenses is two or more, the illumination area adjusting means is provided in each of one field lens and another one of the field lenses. The illumination area adjustment means according to the field lens adjusts the one field lens by turning in the vertical direction, and the illumination area adjustment means according to the other one of the field lenses,
It is preferable that the other one of the field lenses is adjusted by turning in the left-right direction.

In the liquid crystal projector, the illumination area adjusting means includes a holder for holding any one of the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens; It is preferable that the projector further includes an adjusting screw that is screwed at a predetermined position of a housing of the projector or an accessory member thereof, and that supports the holder and adjusts the holder to a predetermined position or angle.

Further, in the liquid crystal projector, it is preferable that the adjusting screw is arranged so as to be adjustable from outside the housing of the liquid crystal projector.

Further, in the liquid crystal projector, the illumination area adjusting means includes a fixing screw inserted at a predetermined position of a housing of the liquid crystal projector or an attached member thereof,
The light source, the integrator, the field lens, the total reflection mirror, carries any of the dichroic mirror and the relay lens, is screwed with the fixing screw, and when the fixing screw is loosened, the position or angle becomes And a holder that can be adjusted and is fixed when the fixing screw is tightened.

According to a fourth aspect of the present invention, there is provided a light source unit having a light source for emitting white light, and a uniform light amount in a section perpendicular to the optical axis with respect to the white light emitted from the light source unit. An integrator section having a predetermined number of integrators, a condensing section having a predetermined number of field lenses for condensing output light from the integrator section, and a predetermined number of total reflections arranged at predetermined positions or angles. The white light transmitted through the condensing portion by the mirror and the dichroic mirror is separated or reflected into three color component lights of blue, green, and red, and a predetermined light between any of the total reflection mirror and the dichroic mirror. A color light separating unit that condenses light by a predetermined number of relay lenses disposed at respective positions, and each color component light separated by the color light separating unit according to predetermined image information. A method of manufacturing a liquid crystal projector, comprising: a liquid crystal panel that modulates; a color light combining unit that combines the respective color component lights modulated by the liquid crystal panel; and a projection unit that projects the combined light combined by the color light combining unit. (S1) providing a means for finely adjusting the position or angle of appropriately selected components among the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens; and (S2) Displaying the liquid crystal projector assembled to a predetermined state to check whether the shadows are evenly distributed on the entire white screen in the up, down, left and right directions; And (S4) if it is determined in step S2 that the light source and the light source are not equal, By adjusting the position or angle of a component appropriately selected from among a grater, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens, a color component light of three colors of green, red, and blue is appropriately selected. Adjusting the first color component light, and (S5) confirming that the shadow of the first color component light is not in the panel irradiation area after the adjustment in the S4 step; When it is determined in step S5 that there is no shadow, a step of checking whether or not the shadow of the second color component light appropriately selected from the remaining two colors is equally distributed in the upper, lower, left, and right directions on the all white screen (S7). If it is determined in step S6 that they are not equal, a component appropriately selected from the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens Adjusting the position or angle of (S8);
In the case where the shadows are equal in the six steps, or after the adjustment in the step S7, a step of confirming that the shadow of the second color component light is not in the panel irradiation area; and (S9) the shadow is determined in the step S8. Confirming that the shadow of the remaining third color component light is not in the panel irradiation area when it is determined that there is no shadow.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In one embodiment of the present invention, a light source unit having a light source for emitting white light, and a light amount in a cross section perpendicular to the optical axis with respect to the white light emitted from the light source unit. An integrator section having a predetermined number of integrators for achieving uniformity, a light condensing section having a predetermined number of field lenses for condensing output light from the integrator section, and a predetermined number of all integrators arranged at predetermined positions or angles. The reflecting mirror and the dichroic mirror separate or reflect white light transmitted through the condensing portion into three color component lights of blue, green and red, and a predetermined light between any of the total reflection mirror and the dichroic mirror. A color light separation unit that condenses light by a predetermined number of relay lenses disposed at the positions of the color light separation units, and separates each color component light separated by the color light separation unit according to predetermined image information. A liquid crystal panel that modulates and modulates the light, a color light combining unit that combines the respective color component lights modulated by the liquid crystal panel, and a projection unit that projects the combined light combined by the color light combining unit. The provision of the illumination area adjusting means for adjusting the position or range of the illumination area with respect to the liquid crystal panel makes it possible to adjust the position of the illumination area with respect to the liquid crystal panel, and serves to improve color unevenness. Therefore, the display on the screen becomes bright and the image quality becomes beautiful. Further, since the range of the illumination area on the liquid crystal panel can be adjusted, the range of illumination on the liquid crystal panel can be reduced. At the same time, it is also possible to disperse the color unevenness to the periphery to make it less noticeable. Therefore, the liquid crystal projector becomes bright and color unevenness is reduced.

[0019]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a color light separation unit and a color light synthesis unit in the liquid crystal projector according to the first embodiment of the present invention. In the liquid crystal projector 1, the position or range of the illumination area with respect to the liquid crystal panel 6 can be adjusted.

The liquid crystal projector 1 includes a light source unit 2 and
An integrator unit 3, a condensing unit 4, a color light separating unit 5,
It includes a liquid crystal panel 6, a color light combining section 7, and a projecting section 8. The light source unit 2 has a light source 21 that emits white light.
The integrator unit 3 has integrators 31 and 32, which are two special lenses for uniformizing the amount of white light emitted from the light source unit in a cross section perpendicular to the optical axis. The condensing unit 4 has a field lens 41 that is a convex lens that condenses the output light from the integrator unit.
The color light separation unit 5 converts white light transmitted through the light collection unit 4 by four total reflection mirrors 51, 52, 53, 54 and two dichroic mirrors 55, 56 arranged at predetermined positions into blue, green, In addition to separating or reflecting into three red (RGB) color component lights, total reflection mirrors 51, 52, 53,
The light is condensed by relay lenses 57 and 58 which are convex lenses disposed at predetermined positions between any one of the dichroic mirrors 54 and dichroic mirrors 55 and 56. Liquid crystal panels 61, 6
Reference numerals 2 and 63 respectively modulate the respective color component lights separated by the color light separation unit 5 according to predetermined video information. The color light combining section 7 combines the respective color component lights modulated by the liquid crystal panel 6. The projection unit 8 projects the combined light combined by the color light combining unit 7.

The total reflection mirrors 51, 52, 53, 54 or the dichroic mirrors 55, 56 are provided with adjusting means for adjusting the position of the illumination area with respect to the liquid crystal panel in the vertical and horizontal directions. By moving in the appropriate direction, the position of the illumination area with respect to each liquid crystal panel can be adjusted vertically and horizontally. FIG. 2 shows the movement of the total reflection mirrors 51, 52, 53, 54 or the dichroic mirrors 55, 56. FIG. 2 is a perspective view showing a movement of a total reflection mirror or a dichroic mirror of the liquid crystal projector according to the first embodiment of the present invention,
(A) shows the movement at the time of vertical adjustment, and (B) shows the movement at the time of horizontal adjustment.

The field lens 41 or the relay lenses 57 and 58 are provided with range adjusting means capable of adjusting the position or range of the illumination area with respect to the liquid crystal panel. The position of the illumination area with respect to each liquid crystal panel can be adjusted vertically and horizontally. Further, by moving these to an appropriate position, it is possible to adjust so as to condense light in an appropriate range, so that the range of the illumination area for each liquid crystal panel can be reduced. In addition, it is also possible to scatter the color unevenness to the periphery at the same time to make it less noticeable. Therefore,
This brings about an effect that the liquid crystal projector becomes bright and color unevenness is reduced. FIG. 3 shows the movement of the field lens 41 or the relay lenses 57 and 58. FIG.
3A and 3B are perspective views illustrating the movement of a field lens or a relay lens of the liquid crystal projector according to the first embodiment of the present invention, wherein FIG. The parentheses indicate movements when adjusting the range of the illumination area.

The effect of reducing color unevenness will be described with reference to the drawings. FIG. 4 is a schematic diagram showing the position or range of the illumination area with respect to the liquid crystal panel, and compares the case where adjustment is possible and the case where adjustment is not possible. This indicates that the illumination efficiency is improved by adjusting the total reflection mirror, the dichroic mirror, the field lens, and the relay lens. The actual illumination area is shifted due to dimensional errors of the components. For this reason, the light amount may not be stable or may be uneven at the edge of the illumination area. Without the adjusting means, the illumination area cannot be corrected. On the other hand, when the adjusting means is provided, the illumination area can be moved (adjusting the total reflection mirror and the dichroic mirror) so that the display area of the liquid crystal panel comes near the center where the light amount can be stably obtained. An illumination area can be secured, and brightness in terms of illumination efficiency is improved. Then, the illumination area is narrowed to such an extent that the light amount at the edge of the illumination area is not stable or the uneven area does not enter the display area of the liquid crystal panel (field lens,
By adjusting the relay lens), the brightness is further improved in terms of the efficiency of illumination, and each stage is improved as compared with the state before the adjustment.

In addition, since the illumination area for each liquid crystal panel can be adjusted, the effect of improving the performance against color unevenness can be obtained by changing the color.

Next, a description will be given of a method of adjusting the illumination area in the manufacturing process of the liquid crystal projector according to the embodiment of the present invention. FIG. 5 is a flowchart of an illumination area adjustment process in the manufacturing process of the liquid crystal projector according to the first embodiment of the present invention. FIG. 6 is a diagram illustrating a field lens of the liquid crystal projector according to the first embodiment of the present invention.
(A) is a front view and a right side view, and (B) is an enlarged view of an adjustment portion. FIG. 7 is an enlarged perspective view of an adjustment portion in the total reflection mirror of the liquid crystal projector according to the first embodiment of the present invention. This is an adjustment for improving the brightness performance.

The assembled liquid crystal projector is displayed to a predetermined state, and it is checked whether the shadow of the color component light is evenly distributed on the all white screen in the upper, lower, left and right directions (step S1). The shadow of the color component light here is a shadow that appears outside the range of the illumination area. If they are even, it is confirmed that the shadow is not in the panel irradiation area (step S2). If there is no shadow, the adjustment passes.
If there is a shadow, it is bad.

If it is determined in step S1 that the image is not uniform, the shadow of the green (G) is adjusted by adjusting the field lens (FL) (by loosening the fixing adjustment screw of the holder of the FL; see FIG. 6). Adjustment is performed (step S3). After the adjustment, the fixing screw is tightened, and it is confirmed that the shadow of G is not in the panel irradiation area (step S4). If there is no shadow, proceed to the next step. If there is a shadow, it is bad.

If it is determined in step S4 that there is no shadow,
It is checked whether the shadow of blue (B) is on the whole white screen evenly in the upper, lower, left and right directions (step S5). The shadow of the color component light here is a shadow that appears outside the range of the illumination area. If not evenly,
The total reflection mirror 3 is adjusted (step S6). At this time, the adjustment is performed by loosening the fixing adjustment screw of the holder of the total reflection mirror (see FIG. 7). If it is equal and equal, it is confirmed that the shadow of B is not in the panel irradiation area (step S7). If there is no shadow, proceed to the next step. If there is a shadow, it is bad.

If it is determined in step S7 that there is no shadow,
It is confirmed that the shadow of red (R) is not in the panel irradiation area (step S8). If there is no shadow, the adjustment passes. If there is a shadow, it is bad.

In this adjustment method, since the step of adjusting the position or range of the illumination area is adopted, the range of the illumination area with respect to the liquid crystal panel can be designed small in advance in the design stage, and the projector becomes bright. There is. In the adjustment method, the adjustment of the field lens and the total reflection mirror may be the adjustment of the integrator 1, the integrator 2, and the total reflection mirror 3. The same effect can be obtained by adjusting the position of the light source.

It is naturally possible to carry out readjustment by this adjustment method even after use after production or shipment, within the scope of the present invention.

Next, another embodiment will be described. In the first embodiment, the field lens 41 and the total reflection mirror 54 are adjusted, but the total reflection mirror 51 and the total reflection mirror 5 are adjusted.
3 can be applied.
FIG. 8 shows the configuration. FIG. 8 is a schematic diagram illustrating a color light separation unit and a color light synthesis unit in the liquid crystal projector according to the second embodiment of the present invention.

Adjustment of the total reflection mirrors 51 and 53 (FIG. 2)
In the case of the field lens 41, the illumination area can be adjusted similarly to the field lens 41, and the effect of improving the brightness can be obtained as in the case of the convex lens adjustment. Moreover, the field lens 41
Since the same effect as that of the adjustment is obtained, the color can be adjusted. Therefore, the effect of improving the color unevenness performance can be obtained.

In the second embodiment, the adjustment of the total reflection mirror 51 may be performed by adjusting the position of the lamp 21. Moreover,
Similar effects can be obtained by adjusting the combination of the relay lens 57 (or the relay lens 58) and the field lens 41.

Next, another embodiment of the present invention will be described. In the first and second embodiments, the integrator 31
And the adjustment of the integrator 32 can be configured in different directions. FIG. 9 shows the configuration. FIG. 9 shows a color light separation unit in a liquid crystal projector according to Embodiment 3 of the present invention;
It is the schematic which showed the color light synthesis part. Integrator 31
And the movement of the integrator 32 are shown in FIG. FIGS. 10A and 10B are perspective views showing the movement of the integrator of the liquid crystal projector according to the third embodiment of the present invention, wherein FIG. 10A shows the movement at the time of vertical adjustment, and FIG. The adjustment of the illumination area is not performed by rotating the integrator 31 and the integrator 32, but is adjusted by a linear motion.

According to this embodiment, the integrator 31
In addition, since the vertical and horizontal adjustments of the integrator 32 are performed, not only the object of the present invention is achieved, but also the integrator 31 and the integrator 32 are adjusted in a linear direction, so that the structure is simplified. Therefore, a synergistic (extraordinary) effect of reducing the number of parts is achieved.

The same effect can be obtained by changing the adjustment of the integrator 31 and the integrator 32 in this embodiment to the adjustment of the field lens 57 and the field lens 58.

[0038]

According to the present invention, it is possible to adjust the illumination area with respect to the liquid crystal panel, so that the color unevenness can be improved, and the effect that the liquid crystal projector becomes bright and the picture quality becomes clear can be obtained.

Further, since the range for illuminating the panel can be adjusted, the range for illuminating the panel can be reduced. At the same time, it is also possible to disperse the color unevenness around and make it less noticeable. As a result, there is an effect that the liquid crystal projector becomes bright and color unevenness is reduced.

Further, since the color tone can be adjusted, the effect of improving the color unevenness performance can be obtained.

By adjusting only the upper and lower sides or the right and left sides of a predetermined part, the same effect as described above can be obtained, and the structure can be simplified and the number of parts can be reduced.

Further, according to the present invention, readjustment can also be performed within the scope of the present invention even during use after production or shipment.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a color light separation unit and a color light synthesis unit in a liquid crystal projector according to a first embodiment of the present invention.

FIGS. 2A and 2B are perspective views illustrating the movement of a total reflection mirror or a dichroic mirror of the liquid crystal projector according to the first embodiment of the present invention, wherein FIG. It is.

FIG. 3 is a perspective view showing movement of a total reflection mirror or a dichroic mirror of the liquid crystal projector according to the first embodiment of the present invention.

FIG. 4 is a schematic diagram showing a position or a range of an illumination area with respect to a liquid crystal panel, comparing an adjustable case and an unadjustable case.

FIG. 5 is a flowchart of a process of adjusting an illumination area in a manufacturing process of the liquid crystal projector according to the first embodiment of the present invention.

6A and 6B are diagrams illustrating a field lens of the liquid crystal projector according to the first embodiment of the present invention, wherein FIG. 6A is a front view and a right side view, and FIG. 6B is an enlarged view of an adjustment part.

FIG. 7 is an enlarged perspective view of an adjustment portion of the total reflection mirror of the liquid crystal projector according to the first embodiment of the present invention.

FIG. 8 is a schematic diagram illustrating a color light separation unit and a color light synthesis unit in the liquid crystal projector according to the second embodiment of the present invention.

FIG. 9 is a schematic diagram illustrating a color light separation unit and a color light synthesis unit in a liquid crystal projector according to a third embodiment of the present invention.

FIGS. 10A and 10B are perspective views illustrating the movement of an integrator of a liquid crystal projector according to a third embodiment of the present invention, wherein FIG. 10A illustrates a movement at the time of vertical adjustment, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid crystal projector 2 Light source part 3 Integrator part 4 Condensing part 5 Color light separation part 6 Liquid crystal panel 7 Color light synthesis part 8 Projection part 21 Light source 31, 32 Integrator 33 FPBS 41 Field lens 51, 52, 53, 54 Total reflection mirror 55, 56 dichroic mirror 57, 58 relay lens 61, 62, 63 liquid crystal panel 64, 65, 66 field lens 71, 72 3-color combining prism

Claims (13)

[Claims] 1. A light source unit having a light source for emitting white light, and a predetermined number of integrators for equalizing the amount of white light emitted from the light source unit in a cross section perpendicular to the optical axis. A condensing unit having a predetermined number of field lenses for condensing the output light from the integrator unit; and a condensing unit by a predetermined number of total reflection mirrors and dichroic mirrors arranged at predetermined positions or angles. A portion of the white light transmitted through the portion is separated or reflected into three color component lights of blue, green and red, and a predetermined number of light components are arranged at a predetermined position between any of the total reflection mirror and the dichroic mirror. A color light separating unit that condenses light by a relay lens; a liquid crystal panel that modulates each color component light separated by the color light separating unit according to predetermined image information; In a liquid crystal projector, comprising: a color light combining unit that combines the respective color component lights modulated by the liquid crystal panel; and a projection unit that projects the combined light combined by the color light combining unit. A liquid crystal projector comprising an illumination area adjusting means for adjusting a range. 2. An illumination area adjusting means for finely adjusting a position or an angle of a component appropriately selected from the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror and the relay lens. The liquid crystal projector according to claim 1, wherein 3. The liquid crystal projector according to claim 2, wherein said illumination area adjusting means is provided in each of said field lens and said total reflection mirror. 4. The liquid crystal projector according to claim 2, wherein said illumination area adjusting means is provided in each of said integrator and said total reflection mirror. 5. The liquid crystal projector according to claim 2, wherein said illumination area adjusting means is provided in at least two of said total reflection mirrors. 6. The liquid crystal projector according to claim 2, wherein said illumination area adjusting means is provided in said light source. 7. The illumination area adjusting means may be configured to separately select two or more components of the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens in different directions. 2. A liquid crystal projector according to claim 1, wherein said means is a means for finely adjusting a position or an angle. 8. When two or more integrators are provided, the illumination area adjustment means is provided in each of one integrator and another one of the integrators, and the illumination area adjustment means according to the one integrator is provided. Adjusting the one integrator by linear movement in the vertical direction; and the illumination area adjusting means according to the other integrator adjusts the other integrator by linear movement in the left and right direction. The liquid crystal projector according to claim 7, wherein: 9. When there are two or more field lenses, the illumination area adjusting means is provided in each of one field lens and another one of the field lenses, and the illumination of the one field lens is provided. The area adjustment means
The one field lens is adjusted by turning in the vertical direction, and the illumination area adjusting means according to the another field lens adjusts the another field lens by turning in the left and right direction. The liquid crystal projector according to claim 7, wherein: 10. The illumination area adjusting means includes: a holder for holding any one of the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens; The screw according to any one of claims 1 to 9, further comprising: an adjusting screw that is screwed at a predetermined position of the attachment member and that supports the holder and adjusts the holder to a predetermined position or angle. LCD projector. 11. The liquid crystal projector according to claim 1, wherein the adjusting screw is arranged so as to be adjustable from outside the housing of the liquid crystal projector. 12. The illumination area adjusting means includes: a fixing screw inserted at a predetermined position of a housing of the liquid crystal projector or an attached member thereof; the light source, the integrator, the field lens, the total reflection mirror, and the dichroic. While carrying either a mirror or the relay lens, it is screwed with the fixing screw, the position or angle can be adjusted when the fixing screw is loosened, and fixed when the fixing screw is tightened. The liquid crystal projector according to any one of claims 1 to 9, further comprising: a holder. 13. A light source unit having a light source for emitting white light, and a predetermined number of integrators for equalizing the amount of white light emitted from the light source unit in a cross section perpendicular to the optical axis. A condensing unit having a predetermined number of field lenses for condensing the output light from the integrator unit; and a condensing unit by a predetermined number of total reflection mirrors and dichroic mirrors arranged at predetermined positions or angles. A portion of the white light transmitted through the portion is separated or reflected into three color component lights of blue, green and red, and a predetermined number of light components are arranged at a predetermined position between any of the total reflection mirror and the dichroic mirror. A color light separating unit that collects light by a relay lens, and a liquid crystal panel that modulates each color component light separated by the color light separating unit according to predetermined image information, A color combining unit for combining the respective color component light modulated by serial liquid crystal panel, and a projection unit for projecting the combined light combined by the color combining unit, in the manufacturing method of a liquid crystal projector having a
(S1) providing a means for finely adjusting the position or angle of an appropriately selected component among the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens;
(S2) a step of displaying the liquid crystal projector assembled to a predetermined state to check whether the shadow is evenly distributed on the all-white screen in the upper, lower, left and right directions; and (S3) when the shadow is present evenly in the S2 step, A step of confirming that the light source is not within the panel irradiation area; and (S4) determining that the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror and the By adjusting the position or angle of a part of the relay lens appropriately selected, three colors of green, red, and blue can be adjusted.
Adjusting the first color component light appropriately selected from the color component lights of the colors, and (S5) determining that the shadow of the first color component light is not in the panel irradiation area after the adjustment in the S4 step. The step of confirming, and (S6) when it is determined that there is no shadow in the step S5, the shadow of the second color component light appropriately selected from the remaining two colors in the all white screen is equally distributed in the upper, lower, left, and right directions. And (S7) when it is determined in step S6 that they are not equal, the light source, the integrator, the field lens, the total reflection mirror, the dichroic mirror, and the relay lens are appropriately selected. The step of adjusting the position or the angle of the component; and (S8) the shadow of the second color component light is not present in the panel irradiation area if it is equal in the step S6 or after the adjustment in the step S7. To make sure that And (S9) when it is determined in step S8 that there is no shadow, a step of confirming that the shadow of the remaining third color component light does not exist in the panel irradiation area. A method for manufacturing a liquid crystal projector.