JPH0519356A - Liquid crystal projector device - Google Patents

Abstract

PURPOSE:To provide a condensing device which condenses light emitted from a light source part without waste by arranging an optical fiber so that density becomes higher and higher from a center to an outer side. CONSTITUTION:A reflector 2 is a parabolic mirror whose reflection surface is a paraboloid, and a light emitting part 1 is provided to be positioned at the focal point of the paraboloid being the reflection surface of the reflector 2. The density becomes higher and higher from the center to the outer side in the incident port 4a and the exiting port 4b of the condensing device 4. By such constitution, the quantity of light made incident on a liquid crystal panel is uniformized even when the quantity of light exiting from the light source part is not adjusted.

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 device for projecting an image using a liquid crystal panel.

[0002]

2. Description of the Related Art Conventionally, there has been known a liquid crystal projector device for projecting an image by using, for example, a transmissive liquid crystal panel as shown in FIG. In this liquid crystal projector device, the light emitting unit 51 is driven by the power source 59, and the light emitting unit 51 is driven.
The light generated by the emission of light is incident on the dichroic prism 52 for color separation.

Here, as the light generated by the light emission of the light emitting portion 51, there are parallel light incident on the color separation dichroic prism 52 and diffused light emitted diffusely from the light emitting portion 51. . The amount of light that is incident on the dichroic prism 52 from the light emitting unit 51 is proportional to the brightness of the image projected on the screen 57, so it is preferable that as much light as possible be incident on the dichroic prism 52. . Therefore, the conventional liquid crystal projector device uses the reflector 60 which is a so-called parabolic mirror whose reflection surface has a parabolic surface. The light emitting unit 51 is provided so as to be located at the focal point of the paraboloid of the reflector 60, and the light emitting unit 51 and the reflector 6 are provided.
The light source unit 61 is configured with 0. The diffused light from the light emitting unit 51 is reflected by the reflector 60 and enters the dichroic prism 52 for color separation as parallel light. Therefore, the amount of parallel light incident on the color separation dichroic prism 52 can be increased. In the conventional liquid crystal projector device, the luminance of the image projected on the screen 57 is improved in this way.

In order to increase the amount of collimated light incident on the dichroic prism 52 for color separation without using the reflector 60, the amount of light emitted by driving the light emitting section 51 with high electric power. The light emitting unit 5
1 generates heat when emitting light. Therefore, high heat is generated by driving the light emitting section 51 with a large amount of power, which adversely affects the surrounding circuits and the like, which is not very preferable. In the conventional liquid crystal projector device, the light emitting unit 51 is provided.
In order to prevent the adverse effect of heat generation due to the emission of light, an infrared cut filter 50 for preventing the transfer of heat due to radiation and a cooling device 58 such as an air cooling fan are provided, and are included in the parallel light from the light emitting portion 51. Infrared components are removed by the infrared cut filter 50, and the heat of the light emitting section 51 itself is radiated by the cooling device 58.

The dichroic prism 52 splits the parallel light incident from the light source unit 61 into red (R), green (G) and blue (B) light. Of the light of each color separated by the dichroic prism 52,
The red light is incident on the red liquid crystal panel 54R via the mirrors 53a and 53b. Further, the green light is directly incident on the green liquid crystal panel 54G, and the blue light is incident on the blue liquid crystal panel 54B via the mirrors 53c and 53d. The liquid crystal panels 54R, 54G, 54B for the respective colors are controlled by an image display circuit (not shown) so as to display an arbitrary image. Therefore, the light of each color corresponding to the arbitrary image is transmitted through the liquid crystal panels 54R, 54G, 54B for each color. The transmitted light of each color is incident on the dichroic prism 55 for color synthesis. The color combining dichroic prism 55 combines the transmitted lights of the respective colors incident via the liquid crystal panels 54R, 54G, 54B for the respective colors. The combined transmitted light is projected as image light on the screen 57 through the lens 56. As a result, an arbitrary color image is displayed on the screen 57.

[0006]

However, as shown in FIG. 9, the conventional liquid crystal projector device uses the reflector 60 in order to effectively utilize the light generated by the light emitting section 51 emitting light, and as many as possible. Although the parallel light A of the above is about to enter the dichroic prism 52 for color separation, the divergent light B and C, which are diffused light that cannot be converted into parallel light by the reflector 60, are generated at present. . Therefore, for example, as shown in FIG. 10, the parallel light A is generated by the liquid crystal panels 54R, 54G, 54.
The divergent lights B and C are incident on a parallel light region 70 which is a region of a circumscribed circle of B, and are incident on a divergent light region 71 which is a region of a circle surrounding the parallel light region 70. As can be seen from FIG. 9, even if the parallel light A is incident on the liquid crystal panels 54R, 54G, and 54B, about 60% of the whole parallel light A, and the remaining 40% is It is not incident on the liquid crystal panels 54R, 54G and 54B. Further, the divergent lights B and C correspond to 30% of the entire light incident on the dichroic prism 52 for color separation from the reflector 60, which is also the liquid crystal panels 54R, 54G and 54.
It is not incident on B.

As described above, in the conventional liquid crystal projector device, even if the reflector 60 is used, there is useless light which is not incident on the liquid crystal panels 54R, 54G and 54B for the respective colors, so that it is projected on the screen. The brightness of the image is insufficient, and it is difficult to recognize the image projected on the screen 57 without darkening the entire room in which the screen 57 is provided.

Further, the amount of light emitted from the light source section 61 gradually decreases from the center of the emitted light to the outside. Therefore, the liquid crystal panels 54R and 5R for the respective colors are
As for the amount of light incident on the 4G and 54B, as shown in FIG. 11, the amount of light in the central region 75, which is a region near the central portion, is large,
The amount of light in the intermediate region 76 that surrounds the central region 75 is moderate, and the amount of light in the outer region 77 that surrounds the intermediate region 76 is small. Is not incident. Therefore, due to the incident light having different light intensity, the temperature rise of the liquid crystal panel part becomes different, and the image projected on the screen 57 has different brightness between the center and the outside of the screen 57. There was uneven brightness. In this state,
Since the entire image projected on the screen 57 is not clear and the brightness of the image in the central portion of the screen 57 is high, adverse effects such as easy eyestrain occur.

Further, when the screen 57 is divided into a plurality of regions and the so-called multi-screen mode in which the same image is projected on each of the divided regions,
When the projected image has the uneven brightness as described above, in the case of the multi-screen mode, the image displayed in the plurality of regions is recognized as one image.
The projected images have no sense of unity, and the advantage of the multi-screen mode is halved.

Further, tentatively, the light emitted from the light source section 61 is condensed without any waste, and the liquid crystal panel 54 for each color is used.
Even if a light converging device that makes light incident on each of R, 54G, and 54B is provided so as to have an equal amount of light, it is very difficult to manufacture such a light condensing device.

The present invention has been made in view of the above problems, and allows light emitted from a light source unit to be uniformly incident on each of the red, green and blue liquid crystal panels without waste. An object of the present invention is to provide a liquid crystal projector device capable of preventing uneven brightness of an image projected on a screen.

Further, the present invention has been made in view of the above-mentioned problems, and the light emitted from the light source unit can be condensed without waste, and the light amount of the emitted light can be made equal to any portion. The purpose is to provide a light collecting device.

Further, the present invention has been made in view of the above-mentioned problems, and the light emitted from the light source section can be condensed without waste, and the light amount of the emitted light can be made equal in all parts. It is an object of the present invention to provide a method for manufacturing a light collecting device that allows the light collecting device to be easily manufactured.

[0014]

In a liquid crystal projector device according to the present invention, light emitted from a light emitting portion is reflected by a parabolic mirror and emitted as parallel light from a light source portion. In a liquid crystal projector device in which the light is condensed by a light condensing means and is incident on a liquid crystal panel, and the image light generated by passing through the liquid crystal panel is projected on a screen, the light from the light source section is incident. By making the entrance of the light means the same shape as the exit of the parabolic mirror, and the exit of the condensing means from which the light from the light source section is emitted, the same shape as the liquid crystal panel, Solve the problem of.

Further, in the liquid crystal projector device according to the present invention, the light emitted from the light source is reflected by the parabolic mirror and emitted as parallel light. It is condensed by means and enters the liquid crystal panel,
In a liquid crystal projector device for projecting image light generated by passing through the liquid crystal panel onto a screen, the light condensing means is configured by arranging optical fibers so that the density gradually increases from the center to the outside. Solve the problem of.

Further, the light collecting device according to the present invention solves the above-mentioned problems by arranging the optical fibers so that the density gradually increases from the center to the outside.

Further, in the method for manufacturing a light-collecting device according to the present invention, the blocks of each layer are formed by changing the density of the optical fiber, and the blocks of each layer are combined so that the density gradually increases from the center to the outside. The above-mentioned problems are solved by the feature of being integrated.

Further, in the method for manufacturing a light concentrating device according to the present invention, the block of each layer in which the density of the optical fiber is changed is manufactured by changing the thickness of the coating material for coating the optical fiber. Solve the problem.

[0019]

In the liquid crystal projector device according to the present invention, the entrance of the light converging means on which the light from the light source unit is made has the same shape as the exit of the parabolic mirror, and the light from the light source unit is By making the emission port of the condensing means for emitting the light of the same shape as the liquid crystal panel, the light emitted from the light source unit is incident on the liquid crystal panel without waste.

Further, in the liquid crystal projector device according to the present invention, the condensing means is configured by arranging the optical fibers so that the density becomes gradually higher from the center to the outside, so that the light incident on the liquid crystal panel is Make the amount of light uniform.

Further, in the light condensing device according to the present invention, the amount of light emitted is made uniform by arranging the optical fibers so that the density gradually increases from the center to the outside.

Further, in the method for manufacturing a light concentrating device according to the present invention, the blocks of each layer are formed by changing the density of the optical fiber, and the blocks of each layer are combined so that the density gradually increases from the center to the outside. A light concentrator is easily manufactured by integrating.

Further, in the method of manufacturing the light-collecting device according to the present invention, the block of each layer in which the density of the optical fiber is changed is easily manufactured by changing the thickness of the coating material for coating the optical fiber.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a liquid crystal projector device according to the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the liquid crystal projector device according to the present embodiment includes a light emitting unit 1, a reflector 2 for deflecting diffused light diffusely emitted from the light emitting unit 1 into parallel light, and a plurality of optical fibers. In other words, it is provided between the condensing device 4 which is a condensing means for condensing the light emitted from the light source part 12 composed of the light emitting part 1 and the reflector 2 and, for example, the reflector 2 and the condensing device 4. , An infrared cut filter 3 that removes an infrared component from incident light, a blue dichroic mirror 5B that reflects only blue (B) light of the incident light, and a green ( It has a green dichroic mirror 5G that reflects only G) light and a red dichroic mirror 5R that reflects only red (R) light, for example, of the incident light. Further, the liquid crystal projector device according to the present embodiment,
A dichroic mirror 6a that reflects the red light reflected by the red dichroic mirror 5R, a dichroic mirror 6b that reflects the blue light reflected by the blue dichroic mirror 5B, and a red light reflected by the dichroic mirror 6a. Liquid crystal panel 7R for red, green liquid crystal panel 7G for green light reflected by the green dichroic mirror 5G, and blue light for blue light reflected by the dichroic mirror 6b. It has a liquid crystal panel 7B. Further, in the liquid crystal projector device according to the present embodiment, the dichroic prism 13 for color combination into which the transmitted light of each color generated by passing through the liquid crystal panels 7R, 7G, and 7B of the above respective colors respectively enters, and the above color combination. Lens 8 for projecting on the screen 9 image light generated by the dichroic prism 13 for use in combining the transmitted light of the respective colors, and a fan for cooling air, for example, for radiating the heat generated by the light emission of the light source section 12. And the like, and a power source 10 for supplying electric power to the light emitting unit 1 and the like.

The reflector 2 is, for example, a parabolic mirror whose reflection surface has a parabolic surface, and the light emitting section 1 is provided so as to be located at the focal point of the parabolic surface which is the reflective surface of the reflector 2.

As shown in FIG. 2, the entrance 4a of the condenser 4 has substantially the same shape as the exit 4a of the reflector 2, that is, a circular shape having the same diameter. Further, as shown in FIG. 3, the emission port 4b of the light collecting device 4 has substantially the same shape as the liquid crystal panels 7R, 7G, 7B of the respective colors, that is, a rectangular shape having the same size. Then, as shown in FIGS. 2 and 3, the light collecting device 4 includes a first layer 21 as a core layer and a second layer arranged so as to surround the first layer 21. 22 and a third layer arranged so as to surround the second layer 22, for example, three layers in total. The optical fibers 28 are arranged in the first layer 21 so that the density of the optical fibers 28 is low, and the optical fiber 28 is arranged in the second layer 22 so that the density of the optical fibers 28 is medium. Are arranged, and the optical fibers 28 are arranged in the third layer 23 so that the density of the optical fibers 28 becomes high. Therefore, the condensing device 4
The entrance 4a and the exit 4b of the optical fiber 28 are configured such that the density of the optical fiber 28 gradually increases from the center to the outside. In addition, the entrance 4a and the exit 4b of the condensing device 4 described above.
May be manufactured so that the density of the optical fiber 28 gradually increases from the center to the outside of one of the entrance 4a and the exit 4b.

The entrance 4a has the same shape as the reflector 2 and the exit 4b has the same shape as the liquid crystal panels 7R, 7G and 7B of the respective colors, and the optical fiber 28 is gradually extended from the center to the outside. In order to manufacture the condensing device 4 having a high density, the first layer 21 to the third layer 23 are manufactured separately, and the separately manufactured first layer 2 is manufactured.
The first to third layers 23 are combined and integrated. That is,
First, as shown in FIG. 4A, the insertion opening 2 having a circular upper end
A first cylindrical metal mold 25 having a rectangular shape 5a and an inner bottom surface 25b is prepared. Next, in the first mold 25, the first mold 2 as shown in FIG.
The number of optical fibers 28 having substantially the same length as 5 is inserted so that the density becomes low. Then, for example, by injecting an inorganic adhesive or the like into the first mold 25 containing the optical fiber 28 and fixing the same, the first mold 25 is removed, and as shown in FIG. The first layer 21 having a low density of the optical fiber 28 is manufactured.

Next, as shown in FIG. 4 (d), at the same height as the first mold 25, the insertion opening 26a at the upper end is circular,
A second inner surface 26b having a rectangular shape and having a first hollow portion 26c having substantially the same shape as the first layer 21 therein.
Of the second die 26, and the second cavity 26d of the second die 26 is a cavity other than the first cavity 26c. Optical fiber 2
Insert 8. Then, the inorganic adhesive or the like is poured into and fixed in the second cavity 26d, and then the second mold 2
By removing 6, the second layer 22 having the medium density of the optical fiber 28 as shown in FIG. Since the first hollow portion 26c has substantially the same shape as the first layer 21 as described above, the first layer 21 is formed in the second layer 22 thus manufactured. As a result, a cavity 22a having substantially the same shape is formed. Therefore, the cavity 22a formed in the second layer 22 is formed.
It is possible to insert the first layer 21 into the.

Next, as shown in FIG. 4 (f), at the same height as the first and second molds 25 and 26, the insertion opening 2 at the upper end is formed.
7a has a circular shape, an inner bottom surface 27b has a rectangular shape, and a first hollow portion 27 having substantially the same shape as the second layer 22 is formed inside.
A third mold 27 having c is prepared, and the third mold 27 is prepared.
In the second cavity 27d, which is a cavity other than the first cavity 27c, a number of the optical fibers 28 having a high density are put. Then, the inorganic adhesive or the like is poured into and fixed in the second cavity 27d, and then the third mold 27 is removed, so that the density of the optical fiber 28 as shown in FIG. The high third layer 23 is produced. As described above, since the first hollow portion 27c has substantially the same shape as the second layer 22, the second layer 22 is included in the third layer 23 manufactured in this manner. As a result, a cavity 23a having substantially the same shape is formed. Therefore, the cavity portion 23a formed in the third layer 23 is formed.
It is possible to insert the second layer 22 into the.

Next, the second layer 22 shown in FIG.
The first layer 21 shown in FIG. 7C is inserted and fixed in the hollow portion 22a of FIG. 6C, and the first layer 21 is inserted in the hollow portion 22a of the second layer 22 of FIG. ) 3rd layer 2 shown in
By simply inserting and fixing it in the hollow portion 23a of No. 3, the above-mentioned light concentrating device 4 in which the density of the optical fibers 28 gradually increases from the center to the outside as shown in FIG. You can

As described above, by adopting a manufacturing method in which the blocks of the respective layers having different densities are manufactured, and the blocks of the respective layers thus manufactured are combined and integrated, the condensing device 4 of stable quality is obtained. Mass production can be performed easily and cost can be reduced. In addition, although the said condensing device 4 decided to combine the block of said 3 layers, this may be any number of layers, and the 1st-3rd layers which manufactured said 1st-3rd layers 21-23. Mold 25-26
Was removed after manufacturing the layers 21 to 23, but may be integrated as described above with the respective molds 25 to 26 still attached.

Next, the light of each layer of the first layer 21 having a low density of the optical fiber, the second layer 22 having a medium density of the optical fiber, and the third layer 23 having a high density of the optical fiber. A method of manufacturing the light collecting device 4 having a more accurate fiber density distribution will be described. First, as shown in FIG. 5A, the first layer 21 having a low density of the optical fibers is
8 is covered with a thick covering material such as synthetic resin, and a plurality of optical fibers 28 covered with the thick covering material 29 are provided in the first mold 25 shown in FIG. It can be easily manufactured by fixing it with a putting adhesive or the like. Next, as shown in FIG. 5B, the second layer 22 having the medium density of the optical fibers covers the respective optical fibers 28 with the coating material having the medium thickness, and this thickness is The second cavity portion 2 of the second mold 26 shown in FIG.
It can be easily manufactured by putting it in 6d and fixing it with an adhesive or the like. Next, the third layer 23 having a high density of the optical fibers is not covered with a coating material on the optical fibers 28 as shown in FIG. 5C, and the third layer 23 shown in FIG. It can be easily manufactured by putting it in the second cavity 27d of the mold 27 and fixing it with an adhesive or the like. Although the optical fiber 28 not covered with the covering material is used when the third layer 23 is manufactured, the optical fiber 28 may be covered with the covering material having a small thickness. .

As described above, by covering the optical fiber 28 with the covering materials having different thicknesses, the first to third layers 21 to 21 are formed.
The density of the optical fiber 28 in each layer of 23 can be made stable. Therefore, it is possible to provide the condensing device 4 having a constant quality. In addition, the optical fiber 28
By adjusting the thickness of the coating material for coating
Since the densities of the optical fibers 28 to 21 can be freely adjusted, it is possible to provide the condensing device 4 that can be applied to various types of liquid crystal projector devices and the like.

The optical fiber 28 is covered with a thick covering material 29 to produce the first layer 21 having a low density, and the optical fiber 28 is covered with a covering material 28 having a medium thickness to have a medium density. The second layer 22 having a certain degree is manufactured, and the third layer 23 having a high density is manufactured by not covering the optical fiber 28 with the covering material. This is shown, for example, in FIG. 6A. As described above, an interposing member 31 such as a thick film is inserted between the rows of the optical fibers 28 to manufacture the first layer 21 having a low density, and as shown in FIG. A second insert having an intermediate insert 32 having an intermediate thickness and having an intermediate density.
The layer 22 may be manufactured, and the third layer 23 having a high density may be manufactured by inserting no interposing material between the rows of the optical fibers 28 as shown in FIG.

In the light collecting device 4 manufactured in this way, the center of the reflector 2 and the center of the light collecting device 4 coincide with each other,
In addition, the center of the condensing device 4 and the centers of the dichroic mirrors 5R, 5G, 5B for the respective colors are provided so as to coincide with each other.

Next, the operation of the liquid crystal projector device of this embodiment will be described. In this liquid crystal projector device, the power source 1
The light emitting unit 1 is driven by 0. As a result, the light emitting unit 1 emits light. The light generated by the light emitting portion 1 emitting light is the dichroic prism 5 for each color.
There are light emitted parallel to R, 5G, and 5B and diffused light emitted diffusely from the light emitting unit 1. The reflector 2 deflects the diffused light into parallel light and emits it.
However, divergent light, which is light that cannot be fully deflected into parallel light, is generated by the reflector 2. The parallel light and the divergent light are
Each of them is incident on the infrared cut filter 3. The infrared cut filter 12 removes an infrared component from the incident parallel light and divergent light and emits it.

Here, in the light collecting device 4, the entrance 4a has the same shape as the reflector 2 as described above,
The center of the light collector 4 and the center of the reflector 2 are provided so as to coincide with each other. Therefore, the light emitted from the light source unit 12 enters the light condensing device 4 through the infrared cut filter 3 not only to the parallel light but also to the divergent light. Therefore, the condensing device 4 can condense the light emitted from the light source unit 12 without waste, and can save the power consumption of the light source unit 12. Further, the light emitted from the light source unit 1 gradually decreases in amount from the center to the outside, but as described above, the condensing device 4 is configured to increase the density of optical fibers from the center to the outside. Since the optical fibers are arranged, the amount of light emitted from the emission port 4b of the light collecting device 4 is a uniform amount regardless of the center or the outside.

The light emitted from the emission port 4b of the condenser 4 is incident on the blue dichroic mirror 5B. The blue dichroic mirror 5B reflects only the blue light of the light incident from the light condensing device 4, and transmits the remaining red light and green light as they are.
The blue light reflected by the blue dichroic mirror 5B is further reflected by the dichroic mirror 6b and is incident on the blue liquid crystal panel 7B.
The red light and the green light transmitted through the blue dichroic mirror 5B are incident on the green dichroic mirror 5G. 5G dichroic mirror for the above green
Of the incident red light and green light reflects only the green light and transmits the remaining red light. The green light reflected by the green dichroic mirror 5G is incident on the green liquid crystal panel 7G. The red light transmitted through the green dichroic mirror 5G is incident on the red dichroic mirror 5R. The red dichroic mirror 5R reflects incident red light. The red light reflected by the red dichroic mirror 5R is further reflected by the dichroic mirror 6a and is incident on the red liquid crystal panel 7G.

Here, the emission port 4b of the light condensing device 4 is
As described above, the liquid crystal panels 7R, 7G, 7B for the respective colors described above.
It has the same shape as. Therefore, the light incident on the liquid crystal panels 7R, 7G, and 7B for the respective colors has a rectangular shape having substantially the same size as the liquid crystal panels 7R, 7G, and 7B for the respective colors, as shown in FIG. 7, for example. . Therefore, the condensing device 4
The light emitted from the emission port 4b can be incident on the liquid crystal panels 7R, 7G, 7B without waste. Further, as described above, the amount of light emitted from the emission port 4b of the light condensing device 4 is equal in all parts. Therefore, as shown in FIG. 7, a central region 40, which is a central region of the liquid crystal panels 7R, 7G, and 7B, an intermediate region 41 that surrounds the central region 40, and an outer region that surrounds the intermediate region. The same amount of light can be incident on any of the outer regions 42. Therefore, it is possible to equalize the temperature rises of the respective regions 40 to 41 of the liquid crystal panel which change depending on the light amount of the incident light, and the projected image generated by the temperature rises of the respective regions 40 to 41 being different. Color unevenness can be prevented, and the liquid crystal projector device can be used for a long time.

Liquid crystal panels 7R, 7G, 7B for the respective colors
Are controlled to display an arbitrary image by an image display circuit (not shown). Therefore, the light of each color corresponding to the above-mentioned arbitrary image is emitted from the liquid crystal panel 7 for each color.
R, 7G, and 7B are transmitted. The transmitted light of each color is used for the color combining dichroic prism 13 respectively.
Is incident on. The color combining dichroic prism 6 combines the transmitted lights of the respective colors incident via the liquid crystal panels 7R, 7G, 7B for the respective colors. The combined transmitted light is projected as image light on the screen 9 through the lens 8.

As described above, the light condensing device 4 can condense the light emitted from the light source section 12 without waste, and the light emitted through the light condensing device 4 is All the parts are incident on the liquid crystal panels 7R, 7G, and 7B for the respective colors in equal amounts. Therefore, the image projected on the screen 9 has a sufficient lightness, the entire image is clear, and there is no color unevenness. Therefore, the image projected on the screen 9 can be recognized even in a bright room. Further, since it is possible to project the image without the color unevenness on the screen 9, the screen 9 is divided into a plurality of areas, and for example, the same image is projected to each of the divided areas, that is, a so-called multi-screen mode. In this case, it is possible to prevent the sense of unity of the images projected on the plurality of regions from being impaired.

As is clear from the above description, in the liquid crystal projector device according to the present embodiment, the light entrance from the light source unit 12 is made incident through the entrance 4a of the condenser 4 and the exit 2a of the reflector 2. Has the same shape as the above, and the light exit port 4b of the condensing device 4 from which the light from the light source unit 12 is emitted.
The same shape as the liquid crystal panels 7R, 7G, 7B for the respective colors, it is possible to form the entrance port 4a and the exit port 4b corresponding to reflectors and liquid crystal panels having various shapes. The light emitted from the portion 12 can be incident on the liquid crystal panels 7R, 7G, 7B for the respective colors without waste. For this reason, it is possible to save power consumption, increase the amount of image light generated from the transmitted light that has passed through the liquid crystal panels 7R, 7G, and 7B for each color, and to increase the amount of image light projected on the screen. The brightness can be increased. Therefore, it is possible to realize a liquid crystal projector device capable of recognizing an image projected on the screen even in a bright room.

Further, in the liquid crystal projector device according to the present embodiment, the light condensing device 4 is formed by arranging the optical fibers so that the density becomes gradually higher from the center to the outside, so that the light source part 12 can be separated from the light source part 12. Even if the amount of emitted light is not adjusted, the liquid crystal panels 7R, 7G,
The amount of light incident on 7B can be made uniform. Therefore, it is possible to equalize the temperature rise of the partial portion of the liquid crystal panel, which changes depending on the amount of incident light, and prevent uneven brightness of the image projected on the screen 9 and project it on the screen 9. It is possible to provide a liquid crystal projector device in which the entire image can be made clear and color unevenness does not occur even when used for a long time. Further, since it is possible to prevent the brightness unevenness of the image projected on the screen 9, it is possible to make the brightness of the image uniform in each of the divided areas in the multi-screen mode.
It is possible to prevent the sense of unity of a plurality of images projected on the screen 9 from being impaired.

Further, the light collecting device according to the present embodiment is configured by arranging the optical fibers so that the density gradually increases from the center to the outside, so that the amount of emitted light can be made uniform. .

Further, in the method of manufacturing the light collecting device according to this embodiment, the first to third layers 21 having different densities of the optical fibers are used.
23 to 23, and the first to third layers 21 to 23 are combined to manufacture the light condensing device 4 whose density gradually increases from the center to the outside. Therefore, the first to third layers are manufactured. By changing the densities of the optical fibers of the layers 21 to 23 as needed, it is possible to easily manufacture the light condensing device 4 that can be applied to various types of liquid crystal projector devices and the like. In addition, the first to third layers 21 to 21 having different densities
Since each layer of 23 is manufactured, mass production can be facilitated, cost can be reduced, and quality can be made constant.

Further, in the method of manufacturing the light-collecting device according to the present embodiment, each layer 21 in which the density of the optical fiber is changed by changing the thickness of the coating material for coating the optical fiber 28.
~ 23 can be easily manufactured. Further, since the density of the optical fibers in the blocks of the layers 21 to 23 can be changed by changing the thickness of the covering material, the light condensing device 4 corresponding to various types of liquid crystal projector devices and the like.
Can be easily manufactured.

[0047]

The liquid crystal projector device according to the present invention is
The entrance of the light condensing means on which the light from the light source section is incident has the same shape as the exit of the parabolic mirror, and the exit of the condensing means on which the light from the light source is emitted is By having the same shape as the liquid crystal panel, it is possible to form the entrance and the exit corresponding to parabolic mirrors and liquid crystal panels having various shapes, and waste light emitted from the light source unit. It is possible to enter the liquid crystal panel without the need. Therefore, it is possible to save power consumption, increase the amount of image light generated from the transmitted light that has passed through the liquid crystal panel, and increase the brightness of the image projected on the screen. Therefore, it is possible to realize a liquid crystal projector device capable of recognizing an image projected on the screen even in a bright room.

Further, in the liquid crystal projector device according to the present invention, the light condensing means is configured by arranging the optical fibers so that the density gradually increases from the center to the outside, so that the light emitted from the light source section is Even if the light amount is not adjusted, the light amount of the light incident on the liquid crystal panel can be made uniform. Therefore, it is possible to make the temperature of the partial portion of the liquid crystal panel, which changes depending on the amount of incident light, uniform, and it is possible to use the liquid crystal projector device for a long time. Further, since the amount of light incident on the liquid crystal panel can be made uniform, it is possible to prevent uneven brightness of the image projected on the screen, and to clarify the entire image projected on the screen. .
Since it is possible to prevent uneven brightness of the image projected on the screen, it is possible to make the image brightness uniform for each of the divided areas when the multi-screen mode is set, and the image is projected on the screen. It is possible to prevent the sense of unity of a plurality of images from being impaired.

Further, the light concentrating device according to the present invention is configured by arranging the optical fibers so that the density gradually increases from the center to the outside, so that the amount of emitted light can be made uniform.

Further, in the method for manufacturing a light-collecting device according to the present invention, the blocks of each layer are formed by changing the density of the optical fiber, and the blocks of each layer are combined so that the density gradually increases from the center to the outside. Since the light-collecting device is manufactured integrally, it is possible to easily mass-produce the light-collecting device having a constant quality. Therefore, the cost can be reduced. Further, since the blocks of each layer are manufactured, the density of the optical fibers of the blocks of each layer can be easily changed as needed, and a light concentrating device corresponding to various types of liquid crystal projector devices can be easily manufactured. can do.

Further, in the method of manufacturing the light collecting device according to the present invention, by changing the thickness of the coating material for coating the optical fiber, it is possible to easily manufacture the block of each layer in which the density of the optical fiber is changed. it can. Further, since the density of the optical fibers of the blocks of each layer can be changed by changing the thickness of the coating material, it is possible to easily manufacture the light condensing device corresponding to various kinds of liquid crystal projector devices and the like. .

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a configuration of a liquid crystal projector device according to the present invention.

FIG. 2 is a schematic diagram for explaining an entrance of a light collecting device provided in the liquid crystal projector device according to the present invention.

FIG. 3 is a schematic diagram for explaining an emission port of a light collecting device provided in the liquid crystal projector device according to the present invention.

FIG. 4 is a schematic diagram for explaining a method of manufacturing a light condensing device according to the present invention.

FIG. 5 is a schematic diagram for explaining a method of manufacturing a block of each layer that constitutes the light-collecting device according to the present invention.

FIG. 6 is a schematic diagram for explaining a method of manufacturing a block of each layer that constitutes the light-collecting device according to the present invention.

FIG. 7 is a schematic view showing how light collected by a light collecting device provided in the liquid crystal projector device according to the present invention is incident on a liquid crystal panel.

FIG. 8 is a schematic diagram showing a configuration of a conventional liquid crystal projector device.

FIG. 9 is a schematic diagram for explaining light emitted from a light source unit provided in a conventional liquid crystal projector device.

FIG. 10 is a schematic diagram for explaining how light from a light source unit is incident on a liquid crystal panel provided in a conventional liquid crystal projector device.

FIG. 11 is a schematic diagram for explaining the amount of light incident on a liquid crystal panel provided in a conventional liquid crystal projector device.

[Explanation of symbols]

1 ・ ・ ・ ・ Emitting part 2 ・ ・ ・ ・ ・ ・ ・ ・ Reflector 3 ・ ・ ・ ・ ・ ・ ・ ・ Infrared cut filter 4 ・ ・ ・Condensing device 4a ・ ・ ・ ・ ・ ・ Inlet 4b ・ ・ ・ ・ ・ ・ Ejector 5R ・ ・ ・ ・ ・ ・ ・ Red dichroic mirror 5G ・ ・ ・・ Green dichroic mirror 5B ・ ・ ・ ・ ・ ・ ・ ・ Blue dichroic mirrors 6a, 6b ・ ・ ・ ・ Dichroic mirror 7R ・ ・ ・ ・ ・ ・ Red liquid crystal panel 7G ・ ・ ・・ ・ ・ ・ Green liquid crystal panel 7B ・ ・ ・ ・ ・ ・ ・ ・ Blue liquid crystal panel 8 ・ ・ ・ ・ ・ ・ ・ ・ Lens 9 ・ ・ ・ ・ ・ ・ ・ ・ Screen 10 ・ ・ ・Power source 11 Cooling device 12 Light source unit 13 Croic prism 21 ... First layer 22 ... Second layer 23 ... Third layer 25 ...・ ・ ・ First mold 26 ・ ・ ・ ・ ・ ・ Second mold 27 ・ ・ ・ ・ ・ ・ ・ Third mold 28 ・ ・ ・ ・ ・ ・Optical fibers 29, 30 ... Coating materials 31, 32 ..

Claims (5)

[Claims] 1. A liquid crystal panel in which light emitted from a light source is reflected by a parabolic mirror and emitted as parallel light from a light source is condensed by a condensing unit composed of a plurality of optical fibers. In a liquid crystal projector device for projecting image light, which is incident and which is generated through the liquid crystal panel, onto a screen, the parabolic mirror is emitted from the entrance of the light converging means to which the light from the light source is incident. A liquid crystal projector device, which has the same shape as a mouth, and has the same shape as that of the liquid crystal panel for the exit of the condensing means through which light from the light source section is emitted. 2. The light emitted from the light emitting portion is reflected by a parabolic mirror and emitted as parallel light. The light from the light source portion is condensed by a condensing means composed of a plurality of optical fibers to a liquid crystal panel. In a liquid crystal projector device that projects image light that is incident and that is generated through the liquid crystal panel onto a screen, the light converging means arranges optical fibers so that the density gradually increases from the center to the outside. A liquid crystal projector device characterized by being configured. 3. A light collecting device in which optical fibers are arranged so that the density gradually increases from the center to the outside. 4. The block of each layer in which the density of the optical fiber is changed is formed, and the blocks of each layer are combined and integrated so that the density gradually increases from the center to the outside. Manufacturing method of the light condensing device. 5. The light condensing device according to claim 4, wherein the block of each layer in which the density of the optical fiber is changed is formed by changing the thickness of the coating material for coating the optical fiber. Production method.