JP3428136B2 - Manufacturing method of color synthesis device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color synthesizing apparatus suitable for application to a three-panel light valve type projection apparatus such as a three-panel type liquid crystal projector apparatus, and a manufacturing method thereof.

[0002]

2. Description of the Related Art Conventionally, as a projection type color image display device, a so-called liquid crystal projector using a liquid crystal panel has been developed. This liquid crystal projector is configured, for example, as shown in FIG. In FIG. 5, reference numeral 1 denotes a light source such as a xenon lamp. After the light from the light source 1 is converted into parallel rays by the spherical reflecting mirror 2 and the collimator lens 3 arranged around the light source 1, the parallel rays are converted into infrared rays. After passing through the removal filter 4 and the quarter-wave plate 5, it is incident on the polarization beam splitter 6.

Then, the parallel light of the P-wave polarization component emitted from the polarization beam splitter 6 is made incident on the first dichroic mirror 21. The first dichroic mirror 21 is a mirror that transmits the red component R and reflects the green component G and the blue component B of the incident light.
The red component R transmitted through the dichroic mirror 21 is reflected by the mirror 22 and bent by 90 °, and then incident on the red liquid crystal display panel 31R. Also, the green component G and the blue component B reflected by the first dichroic mirror 21.
Are incident on the second dichroic mirror 23. The second dichroic mirror 23 is a mirror that transmits the blue component B and reflects the green component G, and causes the green component G reflected by the second dichroic mirror 23 to enter the green liquid crystal display panel 31G. Further, the blue component B transmitted through the second dichroic mirror 23 is reflected by the mirrors 24 and 25 to be bent by 90 °, and then incident on the blue liquid crystal display panel 31B.

Then, the liquid crystal display panels 31R, 31G and 31B of the respective colors are driven by the three primary color signals R, G and B obtained from the video signals supplied to the liquid crystal projector device, and the red image and the green image of the image to be projected. And form a blue image. Then, the liquid crystal display panels 31R, 31G, 31
The red component light, the green component light, and the blue component light incident on B are transmitted through the respective display panels, so that image light of each color is formed.

Then, the image lights of the respective colors are made incident on the color combining dichroic prism 40, the image lights of the respective colors are combined to form color image lights, and the color image lights are projected onto the screen 34 by the projection lens 33. The image is projected and a color image is displayed on the screen 34.

FIG. 6 shows the structure of the color combining dichroic prism 40. The color combining dichroic prism 40 is composed of four right-angle prisms 41, 42, 4
It is configured by joining 3,44. In this case, a red reflection film is formed on one rectangular surface 41a of the first right-angled prism 41 to form a red reflection film surface. Also, this red reflection film surface 41a
Second right-angled prism 4 joined to the rectangular surface opposite to
A blue reflecting film is formed on the bonding surface 42a of No. 2 with the first rectangular prism 41 to form a blue reflecting film surface. Furthermore, the second
The rectangular surface 43a of the third rectangular prism 43 is joined to the rectangular surface of the rectangular prism 42 opposite to the connection surface 42a. In this case, a red reflection film is formed on this rectangular surface 43a to form a red reflection film surface. Furthermore, the red reflection film surface 41a of the first rectangular prism 41 and the third rectangular prism 4
On the other rectangular surface of 3 (the surface opposite to the rectangular surface 43a),
One and the other rectangular surfaces of the fourth rectangular prism 44 are joined. In this case, a blue reflecting film is formed on the surface 44a joined to the third rectangular prism 43 to form a blue reflecting film surface.

It should be noted that the joining of the respective rectangular surfaces is performed using an adhesive, and an adhesive layer 45 filled with the adhesive is formed on each of the joining surfaces.

According to the color combining dichroic prism 40 thus constructed, the green image light supplied from the green liquid crystal panel 31G arranged outside the second rectangular prism 42 is reflected by the reflection film on each joint surface. Then, it is not reflected, and goes straight on and is output from the fourth rectangular prism 44.
Then, the blue image light supplied from the blue liquid crystal panel 31B arranged outside the first right-angled prism 41 is 45 °.
90 ° by being reflected by the inclined blue reflecting surfaces 42a and 44a
It is bent and output from the fourth rectangular prism 44. Further, the image light of red is supplied from the third red liquid crystal panel 31R arranged on the outside of the right-angle prism 43, 45 ° tilted red reflective surface 41a, and reflected by 90 ° bent by 43a, fourth Is output from the right-angled prism 44.

Accordingly, the red image light, the green image light, and the blue image light are combined and output from the fourth rectangular prism 44, and the color image light in which the three primary colors are combined is emitted to the projection lens 33 side. .

According to the color combining dichroic prism 40 using the four right-angled prisms thus configured, one prism 40 can combine three colors, and three colors can be combined in a small space.

[0011]

However, the color combining dichroic prism using the four right-angled prisms as described above has a disadvantage that it is difficult to obtain the accuracy of the bonding surface for color reflection. That is, unless the red reflection film surface 41a of the first right-angled prism 41 and the red reflection film surface 43a of the third right-angled prism 43 are in the same plane, the red image light cannot be accurately reflected, and the second If the blue reflection film surface 42a of the right-angled prism 42 and the blue reflection film surface 44a of the fourth right-angled prism 44 are not on the same plane, the blue image light cannot be accurately reflected.

However, since there is the adhesive layer 45 on each joint surface, the red reflection film surface 41a and the red reflection film surface 43a are accurately made to be on the same plane, and the blue reflection film surface 42a is orthogonal to this surface. It was extremely difficult to manufacture the blue reflection film surface 44a and the blue reflection film surface 44a with high accuracy. Conventionally, in order to ensure this precision, a microscope or the like has been used to perform the joining work while confirming the planar state.

In view of the above points, an object of the present invention is to make it possible to easily and accurately manufacture a color synthesizing device using a rectangular prism.

[0014]

[0015]

[0016]

A method of manufacturing a color synthesizing apparatus according to the present invention is, for example, as shown in FIG. 4, first, second, third, and second rectangular surfaces each having a right angle therebetween. Fourth
The rectangular surfaces of the right-angled prisms 11, 12, 13, and 14 are joined together to form a quadrangle so that the joined surfaces are orthogonal to each other, and a reflective film of a predetermined color is formed on each joined surface. A method of manufacturing a color synthesizing device, comprising: connecting rectangular surfaces of respective right-angle prisms through a reflecting film,
The rectangular width of the right-angled prism 11 is not wider than that of the other right-angled prisms, and one rectangular surface of the first right-angled prism 11
While the one rectangular surface of the second right-angled prism 12 is in contact with the surface of the jig having a flat surface, the other rectangular surface of the first right-angled prism 11 and the second rectangular prism The other rectangular surface of the first rectangular prism 11 and the other rectangular surface of the third rectangular prism 13 are bonded to each other. The rectangular surface is brought into contact with the surface of a jig having a planar surface on which the relief portion of the second rectangular prism 12 is provided, and one rectangular surface of the first rectangular prism 11 and 3 is joined to the other rectangular surface of the right-angled prism 13 and the right-angled surface of the fourth right-angled prism 14 is connected to one rectangular surface of the second right-angled prism 12 and one rectangular surface of the third right-angled prism 13. The two rectangular surfaces that sandwich the .

[0017] manufacturing method of the color combining device of the present invention, for example, as shown in FIGS. 1 and 2, respectively across a right angle
The first, second, third and fourth straight surfaces formed with two rectangular surfaces
Rectangular prisms 11, 12, 13, 14
Join the faces together and make a quadrangle so that the joining faces are orthogonal.
And the reflection of a predetermined color on each joint surface
A method of manufacturing a color synthesizing device having a film formed, comprising:
And the width of the third right-angle prisms 11 and 13 to the other right angle.
No wider than the prism, one of the rectangular faces, and one of the rectangular surfaces of the second rectangular prism 12, is in contact with the surface of the jig 100 having a planar surface of the first rectangular prism 11
In this state, the other rectangular surface of the first rectangular prism 11 and the other rectangular surface of the second rectangular prism 12 are joined together, and then the other rectangular surface of the third rectangular prism 13 is joined,
One rectangular surface of the fourth rectangular prism 14 is
While contacting the surface of the jig 100 having the surface, one rectangular surface of the third rectangular prism 13 and one rectangular surface of the fourth rectangular prism 14 were bonded and further bonded. third rectangular prism projecting the other rectangular surface of the first rectangular prism 11 which projects in both directions because the width is wide from the surface, in both directions because the width is wide from were bonded surface 1
3 and one rectangular surface of the second and fourth rectangular prisms 1
Treatment with a planar surface with 2 and 14 reliefs
The one rectangular surface of the first right-angled prism 11 and the other rectangular surface of the third right-angled prism 13 are made to contact with the one rectangular surface of the second right-angled prism 12 while being brought into contact with the surface of the tool 200. One rectangular surface of the fourth rectangular prism 14 is joined to each other.

[0018]

According to the present invention, the lateral width of the first right angle prism is made wider than that of the other right angle prisms so that the first right angle prism protrudes when they are joined together. The right angle prism can be joined accurately,
It is possible to accurately form the joining surfaces that intersect at right angles, and it is possible to easily manufacture a synthesizing device that is capable of performing accurate color synthesis.

[0019] By wider than two other right-angle prism the width of the rectangular prism of the first right angle prism and the third rectangular prism, thus making it easier to accurately joined.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In the case of this example, the color synthesizing device used in the three-plate type liquid crystal projector device described in the conventional example is used. FIG. 1 is a perspective view showing the color synthesizing device of this example.
This color synthesizer includes a first block 11, a second block 12, and a third block 1 each of which is a right-angle prism.
The third and fourth blocks 14 are formed by joining together the rectangular surfaces. In this case, a reflective film of a predetermined color (for example, red or blue) is formed on each joint surface.

That is, one rectangular surface 1 of the first block 11
1a and one rectangular surface 12a of the second block 12 are bonded together, and a red reflective film is formed on either one of the bonding surfaces 11a and 12a. Further, one rectangular surface 13a of the third block 13 and one rectangular surface 14a of the fourth block 14 are joined together, and the joined surfaces 13a, 14 are joined together.
A red reflective film is formed on either one of a. However, when the red reflecting film is formed on the bonding surface 11a, the bonding surface 1
When the red reflective film is formed on the 3a side and the red reflective film is formed on the joint surface 12a, the red reflective film is formed on the joint surface 14a side.

Further, the other rectangular surface 11b of the first block 11 and the other rectangular surface 13b of the third block 13 are joined together, and a blue reflective film is formed on either one of the joined surfaces 11b and 13b. Furthermore, the other rectangular surface 12b of the second block 12 and the other rectangular surface 14b of the fourth block 14 are joined together, and the joined surface 12
A blue reflective film is formed on either b or 14b. However, when a blue reflecting film is formed on the bonding surface 11b,
A blue reflection film is formed on the joint surface 12b side, and the joint surface 13b
When the blue reflective film is formed on, the blue reflective film is formed on the bonding surface 14b side.

In this example, the first block 11
And the width of the third block 13 are made wider than the widths of the other blocks 12 and 14 by several mm to several cm.

Therefore, in the state where the four blocks 11 to 14 are joined, as shown in FIG.
And the third block 13, the protruding portion 1 protruding from both side surfaces
1c and 13c are formed.

The blocks 11 to 14 are molded from optical glass or synthetic resin.

Next, a procedure for joining the color synthesizing devices configured as described above will be described with reference to FIGS.

In the case of this example, first, one rectangular surface 11a of the first block 11 and one rectangular surface 12a of the second block 12 are joined. At this time, as shown in FIG. 2A, a jig 100 having a flat surface is prepared.
2B, the other rectangular surface 1 of the first block 11
1b and the other rectangular surface 12b of the second block 12,
The surfaces 11a and 12 are brought into contact with the surface of the jig 100.
and a are joined with an adhesive. By doing so, the other rectangular surface 11b of the first block 11 and the other rectangular surface 12b of the second block 12 become exactly horizontal planes. Since the first block 11 has a wider width, the protrusions 11c are formed on both side surfaces of the first block 11 and are joined to each other, as shown in FIG.

Also for the third block 13 and the fourth block 14, similarly, the planar jig 100 is used, and the other rectangular surface 13b of the third block 13 and the other rectangular surface of the fourth block 14 are used. 14b and this jig 100
The surface 13a and the surface 14a are bonded to each other with an adhesive by bringing them into contact with the surface of. By doing so, the other rectangular surface 13b of the third block 13 and the other rectangular surface 14b of the fourth block 14 become exactly horizontal planes. In addition,
In this case as well, the width of the third block 13 is wider,
As shown in FIG. 1, protrusions 13c are formed on both side surfaces of the third block 13 and are joined to each other.

Then, the joined product of the first block 11 and the second block 12, the third block 13 and the fourth block 1
As shown in C of FIG.
Use to join. As shown in FIG. 3, this jig 200 is provided with a square through hole 201 in the central portion thereof, and the surfaces of both side surfaces 202 of this through hole 201 are horizontal. Then, as shown in FIG. 2D, the first block 11
11c on both sides of the joint between the second block 12 and
And the projecting portions 13c on both side surfaces of the joined product of the third block 13 and the fourth block 14, both side surfaces 202 of the jig 200.
The surfaces 11b and 12b and the surfaces 13b and 14b are bonded to each other with an adhesive while being in contact with the surface of the.

By doing so, the first block 11 and the second block 12 joined horizontally in the step B of FIG.
Surfaces 11b and 12b and the joint surfaces formed by the surfaces 13b and 14b of the third block 13 and the fourth block 14 are completely flat, and the joint surface on the side orthogonal to this joint surface is also Since the projecting portion 11c of the one block 11 and the projecting portion 13c of the third block 13 are joined together and bonded, a perfect flat surface can be obtained, and the two joining surfaces that are orthogonal to each other can be an accurate flat surface.

As described above, according to the color synthesizing apparatus of the present embodiment, it is possible to accurately align the two joining surfaces which are orthogonal to each other only by using the plate-shaped jig, and the accuracy can be easily obtained without using a microscope or the like. It is possible to manufacture a high-quality color synthesizing device.

In the above embodiment, the width of the two right-angle prisms 11 and 13 is made wider than that of the other right-angle prisms 12 and 14. However, even if the width of at least one right-angle prism is made wider, Similarly, it can be manufactured in a highly accurate joined state. That is, for example, as shown in FIG. 4, the first block 11 having a large width and the second block 12 having a small width are joined using a flat jig. At this time, the protruding portions 11c protruding from the joint portion are formed on both side surfaces.

Then, the third block 1 whose width is not wide is added to the first block 11 to which the second block 12 is joined.
Join 3 '. At this time, the protrusions 11c on both side surfaces of the first block 11 and one rectangular surface 13a 'of the third block 13' are brought into contact with the surface of a jig (not shown) having a through hole, and the protrusions 11c are formed. And the surface 13a 'are joined so as to be a flat surface.

Finally, the fourth block 14 is joined to the joined article of the first, second and third blocks 11, 12 and 13.

By being manufactured in this way, each rectangular surface of the first block 11 or the surface 11 protruding from this surface
By using c and 11d, the two joining surfaces that intersect at right angles become perfect flat surfaces, and a highly accurate color synthesizing apparatus can be easily manufactured as in the case of the example of FIG.

Further, although the above-mentioned embodiment is applied to the color synthesizing device for the liquid crystal projector device, it is needless to say that it is also applicable to the color synthesizing device of other optical equipment.

[0038]

According to the present invention, the lateral width of the first rectangular prism is made wider than that of the other rectangular prisms so that they project when they are joined together. Other right-angle prisms can be joined accurately, orthogonal joining surfaces can be formed accurately, and a synthesizer that can perform accurate color synthesis can be easily manufactured without using a microscope or the like. .

Further, by wider than two other right-angle prism the width of the rectangular prism of the first right angle prism and the third rectangular prism, thus making it easier to accurately joined.

[Brief description of drawings]

FIG. 1 is a perspective view showing a color synthesizing apparatus according to an exemplary embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a manufacturing process of the color synthesizing device of the embodiment.

FIG. 3 is a perspective view showing a joined state using the jig of one embodiment.

FIG. 4 is a perspective view showing a color synthesizing apparatus according to another embodiment of the present invention.

FIG. 5 is a configuration diagram showing an example of a liquid crystal projector device.

FIG. 6 is a configuration diagram showing an example of a conventional color synthesizing apparatus.

[Explanation of symbols]

11 First block 11c protruding surface 12 Second block 13,13 'Third block 13c protruding surface 14th block 100,200 jig

Claims (2)

(57) [Claims] 1. The rectangular surfaces of first, second, third and fourth rectangular prisms each having two rectangular surfaces formed at a right angle therebetween are bonded to each other so that the bonding surfaces are orthogonal to each other. A method for manufacturing a color synthesizing device, wherein the first rectangular prism and the rectangular prism are formed in a rectangular shape, and a reflecting film of a predetermined color is formed on each of the joint surfaces, and the lateral width of the first rectangular prism is wider than other rectangular prisms. The first rectangular surface of the first rectangular prism and the rectangular surface of the second rectangular prism are brought into contact with the surface of a jig having a planar surface, The other rectangular surface of the right-angled prism is joined to the other rectangular surface of the second right-angled prism, and then the other side of the first right-angled prism that protrudes in both directions due to the wide width from the joined surface. Of the rectangular surface and one of the third rectangular prism The rectangular surface and the rectangular surface of the first rectangular prism, the rectangular surface being in contact with the surface of a jig having a flat surface provided with the relief portion of the second rectangular prism, The third rectangular prism is joined to the other rectangular surface, and the rectangular surface of the fourth rectangular prism is perpendicular to one rectangular surface of the second rectangular prism and one rectangular surface of the third rectangular prism. A method for manufacturing a color synthesizing device, in which two rectangular surfaces sandwiching each other are joined together. 2. The rectangular surfaces of first, second, third and fourth rectangular prisms each having two rectangular surfaces sandwiching a right angle are bonded to each other so that the bonding surfaces are orthogonal to each other. A method for manufacturing a color synthesizing device, wherein the first and third right-angled prisms have a lateral width greater than that of other right-angled prisms. In a state where one rectangular surface of the first right-angled prism and one rectangular surface of the second right-angled prism are brought into contact with the surface of a jig having a planar surface, The other rectangular surface of the first rectangular prism and the other rectangular surface of the second rectangular prism are joined together, and then the other rectangular surface of the third rectangular prism and the fourth rectangular prism Surface of a jig having a flat surface and one rectangular surface of One rectangular surface of the third right-angled prism and one rectangular surface of the fourth right-angled prism in a state of being brought into contact with each other, and further, in both directions because the lateral width is wide from the joined surface. The other rectangular surface of the first right-angled prism that protrudes in one direction, and one rectangular surface of the third right-angled prism that protrudes in both directions because the lateral width is wide from the joined surface. The rectangular surface of the first rectangular prism and the other rectangular surface of the third rectangular prism are brought into contact with the surface of the jig having a flat surface provided with the relief portion of the rectangular prism of No. 4 above. A method for manufacturing a color synthesizing device, wherein a rectangular surface is joined to one rectangular surface of the second rectangular prism and one rectangular surface of the fourth rectangular prism.