JP2010211159A - Optical unit for projector device, and projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical unit for a projector device, which is advantageous for simplifying replacement work of an emitting side polarizing plate while achieving miniaturization, and to provide a projector device. <P>SOLUTION: The optical unit 54 includes: first, second and third optical modulators 18R, 18G and 18B; a light compounding prism 20; and first to third emitting side polarizing plates 22R, 22G and 22B. Further, the optical unit 54 includes a housing for a light compounding part 56 in which the first, second and third optical modulators 18R, 18G and 18B, the light compounding prism 20, and the first to third emitting side polarizing plates 22R, 22G and 22B are mounted. The housing for the light compounding part 56 is provided with a guide 74 and a take-out port 76 for detaching the first, second and third emitting side polarizing plates 22R, 22G and 22B from a mounting surface 72, and attaching the plates to the mounting surface 72. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical unit for a projector device and a projector device.

Three transmission-type liquid crystal displays that modulate red, green, and blue light according to image information, three output-side polarizing plates disposed on the light output side of each transmission-type liquid crystal display, and each output-side polarizing plate There is a projector device that includes a light combining prism that combines and emits light emitted from the projector.
Each output side polarizing plate is attached to a holding member.
As a structure for attaching the output side polarizing plate to the holding member, a structure in which the output side polarizing plate is attached to the holding member using a spring member (see Patent Document 1), and an output side polarizing plate is attached to the holding member using an adhesive (See Patent Document 2).

Patent No. 4033210 Japanese Patent No. 3953067

However, when attaching each output side polarizing plate using a spring member, since many spring members are required corresponding to each output side polarizing plate, in order to reduce component cost and assembly cost, In addition, there is a disadvantage in miniaturization.
On the other hand, when each output side polarizing plate is attached using an adhesive, the above-mentioned problem can be solved, but each time the transmission type liquid crystal display must be removed, and the replacement work is troublesome.
In recent years, the temperature of the output side polarizing plate tends to become high as the output of the light source increases, so the output side polarizing plate is likely to deteriorate with the passage of time of use. Simplification of work is required.
However, the above-described conventional technique has a disadvantage in simplifying the replacement work of the output-side polarizing plate while reducing the size.
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an optical unit for a projector device and a projector device that are advantageous in simplifying the replacement work of the exit-side polarizing plate while reducing the size. It is to provide.

In order to achieve the above object, an optical unit for a projector apparatus according to the present invention is provided for each of first, second, and third light having different wavelength regions, and adjusts the polarization state of the light according to image information. And the first, second, and third light modulators to be transmitted, and the first, second, and third light beams transmitted from the first, second, and third light modulators are incident on the first light modulator. , The second and third incident surfaces, the combining unit that combines the first, second, and third lights incident on the first, second, and third incident surfaces, and the combining unit. A light combining prism having an exit surface for emitting the emitted light, a first exit-side polarizing plate disposed between the first light modulator and the first entrance surface, and the second light modulation. A second output-side polarizing plate disposed between the second light incident surface and the third light incident surface, and a third light disposed between the third light modulator and the third light incident surface. A light combining unit housing to which a light-side polarizing plate, the first, second, and third light modulators, a light combining prism, and first to third light-emitting side polarizing plates are attached; The housing for the prism is provided at a portion facing the first, second, and third entrance surfaces of the prism mounting portion to which the light combining prism is mounted, and the light combining prism mounted on the prism mounting portion. 1, 2, 3, and the 1st, 2nd, 3rd side frame respectively facing the 1st, 2nd, 3rd entrance plane, respectively The first, second, and third polarizing plate mounting portions to which the first, second, and third outgoing-side polarizing plates are attached, and the first, second, and third outgoing-side polarizing plates are the first, The first, second, and third optical transformations are opposed to the surfaces opposite to the surfaces facing the second and third incident surfaces. And first, second, and third light modulator mounting portions, and the first, second, and third light modulator mounting portions are the first, second, and third light modulator mounting portions. The first, second, and third light modulations from the direction orthogonal to the first, second, and third incident surfaces of the light combining prism attached to the prism mounting portion are the exit-side polarizing plates. The first, second, and third polarizing plate mounting portions are configured to be inserted into the first, second, and third polarizing plate mounting portions through the device mounting portions. An attachment surface to which the second and third emission-side polarizing plates are bonded via an adhesive, and the first, second, and third emission-side polarization plates attached to the attachment surface and the attachment surface Insert a jig in between, and peel off the first, second and third output side polarizing plates from the mounting surface. And the first, second, and third incident surfaces of the light combining prism that are attached to the prism mounting portion. And a take-out port for taking out from the direction parallel to the.
The projector device of the present invention includes an optical unit, and the optical unit is provided for each of the first, second, and third lights having different wavelength regions, and adjusts the polarization state of the lights according to image information. The first, second, and third light modulators to be transmitted, and the first, second, and third lights that are transmitted from the first, second, and third light modulators are incident on the first, The second and third incident surfaces, the combining unit that combines the first, second, and third lights incident on the first, second, and third incident surfaces, and the combining unit A light combining prism having an emission surface for emitting light; a first emission-side polarizing plate disposed between the first light modulator and the first incident surface; and the second light modulator. And a second output-side polarizing plate disposed between the second light incident surface, and a third light disposed between the third light modulator and the third light incident surface. An output side polarizing plate; the first, second, and third light modulators; a light combining prism; and a light combining unit housing to which the first to third output side polarizing plates are attached; The housing for the prism is provided at a portion facing the first, second, and third entrance surfaces of the prism mounting portion to which the light combining prism is mounted, and the light combining prism mounted on the prism mounting portion. 1, 2, 3, and the 1st, 2nd, 3rd side frame respectively facing the 1st, 2nd, 3rd entrance plane, respectively The first, second, and third polarizing plate mounting portions to which the first, second, and third outgoing-side polarizing plates are attached, and the first, second, and third outgoing-side polarizing plates are the first, The first, second, and third lights facing the surface opposite to the surfaces facing the second and third incident surfaces First, second, and third light modulator mounting portions to which the modulator is mounted, and the first, second, and third light modulator mounting portions are the first, second, and third mounting portions. The first, second, and third lights from directions orthogonal to the first, second, and third incident surfaces of the light combining prism attached to the prism mounting portion. The first, second, and third polarizing plate mounting portions are configured to be inserted into the first, second, and third polarizing plate mounting portions through the modulator mounting portion. A mounting surface to which the second and third output-side polarizing plates are bonded via an adhesive, and the first, second and third output-side polarizing plates attached to the mounting surface and the mounting surface. A jig is inserted between the first, second and third output-side polarizing plates from the mounting surface. The first, second, and third incidents of the light combining prism attached to the prism mounting portion with the guide portion for mounting and the peeled first, second, and third output-side polarizing plates. And a take-out port for taking out from a direction parallel to the surface.

According to the present invention, the guide portion and the extraction port for removing the first, second, and third emission-side polarizing plates from the attachment surface and bonding to the attachment surface are provided in the photosynthesis unit housing.
Accordingly, the first, second, and third light modulators can be replaced with the light combining unit housing without removing the first, second, and third light modulators from the light combining unit housing. This is advantageous in simplifying the replacement work of the exit side polarizing plate while reducing the size.

It is explanatory drawing which shows the structure of the projector apparatus 10 of this Embodiment. It is explanatory drawing which shows the structure of the principal part of the projector apparatus 10 of this Embodiment. It is a perspective view of the optical unit 54 of this Embodiment. It is the perspective view which looked at the housing 56 for photosynthesis parts from the upper direction. It is the perspective view which looked at the housing 56 for photosynthesis parts from the downward direction. It is the perspective view which looked at the housing 56 for photosynthesis parts from the back. It is AA sectional view taken on the line of FIG. It is a top view of the housing 56 for photosynthesizers. It is A arrow directional view of FIG. It is a B arrow view of FIG. It is C arrow line view of FIG. It is D arrow line view of FIG. It is E arrow line view of FIG. FIG. 6 is an enlarged perspective view of a main part of the photosynthesis unit housing 56. FIG. 11 is an explanatory diagram of attaching an optical modulator to the light combining unit housing 56; FIG. 11 is an explanatory diagram of attaching an optical modulator to the light combining unit housing 56; It is FF sectional view taken on the line of FIG. It is a principal part enlarged view of FIG. It is explanatory drawing of the operation | work which attaches the radiation | emission side polarizing plate to the housing 56 for photosynthesizers. It is a G arrow line view of FIG. It is explanatory drawing of the operation | work which removes the output side polarizing plate from the housing 56 for photosynthesis parts.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory diagram illustrating a configuration of a projector device 10 according to the present embodiment, and FIG. 2 is an explanatory diagram illustrating a configuration of a main part of the projector device 10 according to the present embodiment.
As shown in FIG. 1, the projector device 10 includes a light source unit 12, a separation unit 14, first, second, and third incident-side polarizing plates 16 </ b> R, 16 </ b> G, and 16 </ b> B, first, second, and third. Optical modulators 18R, 18G, and 18B.
Further, the projector device 10 further includes a light combining prism 20, first, second, and third emission-side polarizing plates 22R, 22G, and 22B, a projection optical system 24, and the like.
The light source unit 12, the separation unit 14, and the first, second, and third incident side polarizing plates 16R, 16G, and 16B are attached to a frame (not shown) via a conventionally known attachment member.
The first, second, and third light modulators 18R, 18G, and 18B, the light combining prism 20, the first, second, and third emission-side polarizing plates 22R, 22G, and 22B, and the projection optical system 24 These are attached to the frame via the photosynthesis unit housing 56 shown in FIG.

(Light source unit 12)
The light source unit 12 includes a light source 26, a UV cut filter 28, a fly-eye lens 30, a PS conversion element 32, a condenser lens 34, and the like.
The light source 26 emits white light, and various conventionally known lamps such as an ultra high pressure lamp that emits white light can be adopted as the light source 26.
The UV cut filter 28 blocks passage of ultraviolet rays emitted from the light source 26 provided in front of the light source 26.
The fly-eye lens 30 is provided in front of the UV cut filter 28, and uniformizes the illuminance distribution of the light transmitted through the UV cut filter 28, whereby the first, second, and third light modulators 18R, 18G, The effective area of 18B is uniformly illuminated.
In the present embodiment, a plurality of fly-eye lenses 30 are provided.
The PS conversion element 32 aligns the polarization direction of the light guided by the fly-eye lens 30 in a predetermined direction. Specifically, the PS conversion element 32 transmits the S-polarized light as it is and transmits the P-polarized light to the S-polarized light. It is made to pass through after being converted to.
The condenser lens 34 converges the light emitted from the PS conversion element 32.

(Separator 14)
The separation unit 14 separates the light from the light source unit 12 into R (red) light, G (green) light, and B (blue) light having different wavelength regions, in other words, from the light source unit 12. Is divided into first, second and third lights having different wavelength regions.
The separation unit 14 includes first and second dichroic mirrors 36 and 38 and first, second, and third reflection mirrors 40, 42, and 44.
The first dichroic mirror 36 reflects light in the blue wavelength region of the light guided from the light source unit 12 and transmits light in the green and red wavelength regions.
The second dichroic mirror 38 reflects the light in the green wavelength region out of the light transmitted through the first dichroic mirror 36 and guides it to the second optical modulator 18G, and transmits the light in the red wavelength region. Is.

The first reflecting mirror 40 reflects the light B in the blue wavelength region separated by the first dichroic mirror 36 and guides it to the third optical modulator 18B.
The second reflecting mirror 42 reflects the light R in the red wavelength region separated by the second dichroic mirror 38 and guides it to the third reflecting mirror 44.
The third reflecting mirror 44 guides the light R in the red wavelength region guided by the second reflecting mirror 38 to the first light modulator 18R.
In the figure, reference numerals 46A and 46B denote relay lenses that correct the optical path length of the light R, and reference numerals 48R, 48G, and 48B denote condenser lenses that converge the light R, light G, and light B, respectively.
The separator 14 only needs to be able to separate light from the light source unit 12 into red, green, and blue light, and is not limited to the above-described configuration, and various conventionally known configurations can be employed.

(First, second, and third incident side polarizing plates 16R, 16G, and 16B)
The first, second, and third incident-side polarizing plates 16R, 16G, and 16B align the polarization components of the light R, light G, and light B emitted from the separation unit 14 to S waves.
Note that the polarization components of the light R, light G, and light B are aligned in the S wave by the PS conversion element 32, but the light R, light G, and light B pass through the mirrors and lenses that form the separation unit 14. The polarization component of this is disturbed and includes a non-S wave.
Therefore, by using the first, second, and third incident-side polarizing plates 16R, 16G, and 16B, the disturbance of the polarization components of the light R, light G, and light B is removed and the S waves are aligned.
Since the PS conversion element 32 is used, the light guided to the first, second, and third incident-side polarizing plates 16R, 16G, and 16B has a somewhat distorted polarization component, but is generally an S wave. It is aligned.
Therefore, the light absorption and reflection at the first, second, and third incident-side polarizing plates 16R, 16G, and 16B are not large, and the degree of heat generation is so high even if the light amount of the light source 26 is large. is not.

(First, second, and third optical modulators 18R, 18G, and 18B)
The first, second, and third optical modulators 18R, 18G, and 18B are provided for each of the light R, light G, and light B guided from the separation unit 14.
The first, second, and third light modulators 18R, 18G, and 18B use the polarization state of the light guided through the first, second, and third incident-side polarizing plates 16R, 16G, and 16B as image information. Accordingly, the light is adjusted and transmitted, thereby modulating the light according to the image information.
More specifically, the first, second, and third light modulators 18R, 18G, and 18B display image information of three colors of red, green, and blue, respectively.
The first, second, and third light modulators 18R, 18G, and 18B are applied with a video signal of a color corresponding to the incident light, and adjust the polarization direction of the incident light according to the video signal and transmit it. .
In other words, the first, second, and third optical modulators 18R, 18G, and 18B convert incident light from S-polarized light to P-polarized light and output the modulated light.
The first, second, and third optical modulators 18R, 18G, and 18B convert the polarization direction of incident light from S-polarized light to P-polarized light when the input video signal is white (in the brightest case). Make it transparent.
In the present embodiment, the first, second, and third optical modulators 18R, 18G, and 18B are configured by transmissive liquid crystal panels.

(First, second, and third emission-side polarizing plates 22R, 22G, and 22B)
The first, second, and third emission-side polarizing plates 22R, 22G, and 22B are used for the light R, light G, and light B emitted from the first, second, and third light modulators 18R, 18G, and 18B, respectively. Among the polarization components, the P wave is transmitted, and the other polarization components that should be blocked from being transmitted are absorbed.
In the present embodiment, as shown in FIG. 2, each of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B includes a modulator-side polarizing plate 50 and a prism-side polarizing plate 52. It is composed of two polarizing plates.
Therefore, a total of three modulator-side polarizing plates 50 and prism-side polarizing plates 52 are provided.
The modulator-side polarizing plate 50 is disposed to face the first, second, and third optical modulators 18R, 18G, and 18B.
The prism-side polarizing plate 52 is disposed so as to oppose each incident surface 2002, 2004, 2006 of the light combining prism 20 between each modulator-side polarizing plate 50 and the light combining prism 20.
The first, second, and third emission-side polarizing plates 22R, 22G, and 22B are polarization components other than P-waves of the light emitted from the first, second, and third optical modulators 18R, 18G, and 18B. It generates heat by absorbing the light.
In the present embodiment, since the heat generated by each of the exit-side polarizing plates 22R, 22G, and 22B absorbing light is dispersed in the modulator-side polarizing plate 50 and the prism-side polarizing plate 52, each outgoing-side polarizing plate Suppression of temperature rise of 22R, 22G, and 22B is achieved.
Each modulator-side polarizing plate 50 is disposed in a state in which a space S1 is secured between each of the optical modulators 18R, 18G, and 18B and a space S2 is secured between each of the prism-side polarizing plates 52.
Each prism-side polarizing plate 52 is disposed between the modulator-side polarizing plate 50, each light modulator 18 R, 18 G, 18 B and each incident surface 2002, 2004, 2006 of the light combining prism 20.
Each prism-side polarizing plate 52 is arranged in a state in which a space S3 is secured between each incident surface 2002, 2004, and 2006.
In order to dissipate heat from the first, second, and third emission-side polarizing plates 22R, 22G, and 22B, air blowing means (not shown) such as a fan that circulates air through the spaces S1, S2, and S3 is provided.

(Photosynthesis prism 20)
As shown in FIG. 2, the light combining prism 20 includes first, second, and third incident surfaces 2002, 2004, and 2006, first and second dichroic mirror films 2010 and 2012, and an output surface 2008. is doing.
The first and third entrance surfaces 2002 and 2006 are parallel, and the second entrance surface 2004 and the exit surface 2008 are orthogonal to and parallel to the first and third entrance surfaces 2002 and 2006.
The first and second dichroic mirror films 2010 and 2012 are orthogonal to each other and intersect the first, second, and third incident surfaces 2002, 2004, and 2006, and the exit surface 2008 at 45 degrees. .
The light R transmitted from the first optical modulator 18R is incident on the first incident surface 2002.
The light G transmitted from the second optical modulator 18G is incident on the second incident surface 2004.
The light B transmitted from the third optical modulator 18B is incident on the third incident surface 2006.
The first and second dichroic mirror films 2010 and 2012 are synthesized by reflecting or transmitting the light R, light G, and light B for each wavelength region of the light.
Specifically, the first dichroic mirror film 2010 transmits the P wave regardless of the wavelength, reflects only the light in the red wavelength region of the S wave, and removes the light other than the red wavelength region in the S wave. To Penetrate.
The second dichroic mirror film 2012 transmits the P wave regardless of the wavelength, reflects only the light in the blue wavelength region of the S wave, and transmits the light other than the blue wavelength region in the S wave.
The emission surface 2008 emits light synthesized by the first and second dichroic mirror films 2010 and 2012.
In the present embodiment, the first, second, and third lights incident on the first, second, and third incident surfaces 2002, 2004, and 2006 by the first and second dichroic mirror films 2010 and 2012, respectively. A synthesizing unit for synthesizing is configured.

(Projection optical system 24)
The projection optical system 24 forms an image on the screen S by irradiating the screen S with light guided from the exit surface 2008 of the light combining prism 20 as shown in FIG.

(Optical unit 54)
Next, the optical unit 54 which is the gist of the present invention will be described.
As shown in FIG. 2, the optical unit 54 includes first, second, and third light modulators 18R, 18G, and 18B, a light combining prism 20, and first to third emission-side polarizing plates 22R, 22G, 22B.
As shown in FIGS. 3 to 7, 15, and 16, the optical unit 54 further includes the first, second, and third light modulators 18 </ b> R, 18 </ b> G, and 18 </ b> B, the light combining prism 20, and the first to second light modulators. And a light combining unit housing 56 to which the three output side polarizing plates 22R, 22G, and 22B are attached. In FIG. 15, illustration of the emission side polarizing plates 22R, 22G, and 22B is omitted.
The first, second, and third incident surfaces 2002, 2004, and 2008 of the light combining prism 20 have a rectangular shape.
The first, second, and third light modulators 18R, 18G, and 18B and the first, second, and third emission-side polarizing plates 22R, 22G, and 22B are the first, second, and third incident surfaces. It has a rectangular plate shape corresponding to 2002, 2004, 2008.

As shown in FIGS. 5 to 8 and FIG. 13, the light combining unit housing 56 includes a prism mounting unit 58, first, second, and third side frame units 60R, 60G, and 60B, and a projection optical system. And an attachment portion 59.
The photosynthesis unit housing 56 is formed of a hard material so that various optical members and optical parts can be assembled with high accuracy, and is formed so as to be elastically deformable so as not to be plastically deformed when subjected to an impact. In the present embodiment, the photosynthesis unit housing 56 is made of synthetic resin.
The prism mounting portion 58, the first, second, and third side frame portions 60R, 60G, and 60B, and the projection optical system mounting portion 59 are integrally formed.
The projection optical system attachment portion 59 is a place where the projection optical system 24 is attached.
The projection optical system attachment portion 59 is provided at a location facing the emission surface 2008 of the light combining prism 20 attached to the prism attachment portion 58.
The prism mounting portion 58 is a place where the light combining prism 20 is mounted.
The first, second, and third side frame portions 60R, 60G, and 60B are opposed to the first, second, and third incident surfaces 2002, 2004, and 2006 of the light combining prism 20 attached to the prism attachment portion 58. It is provided in the place to do.
As shown in FIG. 6, the first, second, and third incident surfaces 2002, 2004, 2006, and the exit surface 2008 have a rectangular shape, and the upper surface 2020 and the lower surface 2022 that connect these surfaces also have a rectangular shape. ing.

As shown in FIGS. 8 and 10 to 12, the first, second, and third side frame portions 60R, 60G, and 60B are provided with the first, second, and third polarizing plate attachment portions 62R, 62G, 62B, and first, second, and third optical modulator attachment portions 64R, 64G, and 64B.
The first, second, and third polarizing plate mounting portions 62R, 62G, and 62B are opposed to the first, second, and third incident surfaces 2002, 2004, and 2006, respectively. This is where the outgoing side polarizing plates 22R, 22G, and 22B are attached.
The first light modulator attachment portion 64R is a place where the first light modulator 18R is attached with the first output-side polarizing plate 22R facing the surface opposite to the surface facing the first incident surface 2002. is there.
The second light modulator attachment portion 64G is a place where the second light modulator 18G is attached so that the second output-side polarizing plate 22G faces the surface opposite to the surface facing the second incident surface 2004. is there.
The third light modulator attachment portion 64B is a place where the third light modulator 18B is attached with the third output-side polarizing plate 22B facing the surface opposite to the surface facing the third incident surface 2006. is there.

The first light modulator attachment portion 64R includes a first polarized light that passes through the first light modulator attachment portion 64R from the direction in which the first output-side polarizing plate 22R is orthogonal to the first incident surface 2002. It is comprised so that it can insert in the board attachment part 62R.
The second light modulator mounting portion 64G is configured so that the second output-side polarizing plate 22G passes through the second light modulator mounting portion 64G from the direction orthogonal to the second incident surface 2004, and the second polarized light. It is comprised so that it can insert in the board attachment part 62G.
The third light modulator attachment portion 64B is configured so that the third output-side polarizing plate 22B passes through the third light modulator attachment portion 64B from the direction orthogonal to the third incident surface 2006, and the third polarization It is comprised so that it can insert in the board attachment part 62B.
Here, the first, second, and third incident surfaces 2002, 2004, and 2006 are incident surfaces of the light combining prism 20 attached to the prism mounting portion 58.

More specifically, as shown in FIGS. 8, 10 to 12, and 14, each of the first, second, and third light modulator mounting portions 64R, 64G, and 64B has four rectangular vertices. It includes four mounting pins 66 provided at corresponding locations.
As shown in FIG. 16, each of the first, second, and third optical modulators 18R, 18G, and 18B includes four first, second, and third optical modulator mounting portions 64R, 64G, and 64B. The mounting pins 66 are inserted into the mounting holes 1802 and are aligned and mounted in the six axial directions.
Accordingly, the first, second, and third light modulator attachment portions 64R, 64G, and 64B are configured to attach the four corners of the first, second, and third light modulators 18R, 18G, and 18B. .
The first, second, and third light modulators 18R, 18G, and 18B are attached after the first, second, and third emission-side polarizing plates 22R, 22G, and 22B are attached.
As shown in FIGS. 10 to 12, openings 68 are formed inside the four mounting pins 66.
The opening 68 is for allowing the exit-side polarizing plates 22R, 22G, and 22B to pass through from a direction orthogonal to the incident surfaces 2002, 2004, and 2006 while maintaining a parallel state with the incident surfaces 2002, 2004, and 2006.

As shown in FIGS. 3 and 16, the first, second, and third light modulators 18R, 18G, and 18B are provided on the first, second, and third incident surfaces 2002, 2004, and 2006 of the light combining prism. It has a corresponding rectangular shape.
A flexible printed circuit board connected from one of the four sides of the first, second, and third optical modulators 18R, 18G, and 18B to the first, second, and third modulators 18R, 18G, and 18B. 70 is protruded.
The first, second, and third light modulators 18R, 18G, and 18B are attached to the first, second, and third light modulator mounting portions 64R so that the flexible printed circuit board 70 is positioned on the upper surface 2020 of the light combining prism 20. , 64G, 64B.

As shown in FIGS. 10 to 12, 17, and 18, the first, second, and third polarizing plate mounting portions 62 </ b> R, 62 </ b> G, and 62 </ b> B include a mounting surface 72, a guide portion 74, and an extraction port 76. And.
The first, second, and third emission-side polarizing plates 22R, 22G, and 22B have rectangular shapes corresponding to the first, second, and third incident surfaces 2002, 2004, and 2006 of the light combining prism.
As shown in FIG. 10 to FIG. 12 and FIG. 14, the first, second, and third polarizing plate mounting portions 62R, 62G, and 62B are provided on the first, second, and third output side polarizing plates 22R, 22G. , 22B corresponding to the four sides 65B.
The attachment surface 72 is provided on two side portions 65 of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B. .
The attachment surface 72 extends along the sides of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B.
The attachment surface 72 is a location where the first, second, and third emission-side polarizing plates 22R, 22G, and 22B are bonded via an adhesive.
In the present embodiment, adhesive tapes attached to two opposing sides of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B are bonded to the attachment surface 72.
Note that the first, second, and third light modulators 18R, 18G, and 18B and the first, second, and third emission-side polarizing plates 22R, 22G, and 22B have first four sides of the first light combining prism. The second and third incident surfaces 2002, 2004, and 2006 are arranged in parallel to the four sides.

As shown in FIG. 21, the guide portion 74 has a jig G inserted between the first, second, and third emission-side polarizing plates 22 R, 22 G, and 22 B attached to the attachment surface 72 and the attachment surface 72. Is to do. And the guide part 74 is for peeling off those 1st, 2nd, 3rd output side polarizing plates 22R, 22G, and 22B from the attachment surface 72. As shown in FIG. Here, tweezers or the like is used for the jig G.
The guide portion 74 is provided at an end portion near the lower surface 2022 in the extending direction of the attachment surface 72.
The guide portion 74 is formed of an inclined surface 7402 that is gradually displaced away from the virtual extension surface of the attachment surface 72 as it goes on the virtual extension in the extending direction of the attachment surface 72.
An opening 73 is provided at the end of the mounting surface 72 in the extending direction near the upper surface 2020. The opening 73 is formed by inserting a jig G between the first, second, and third emission-side polarizing plates 22R, 22G, and 22B and the attachment surface 72, and then applying the first, second, and third emission-side polarizations. The plates 22R, 22G, and 22B are for peeling off from the mounting surface 72. In the present embodiment, an inclined surface 7302 for facilitating the operation of the jig is formed below the opening 73.
In addition, the end of the mounting surface 72 near the upper surface 2020 in the extending direction is in contact with the sides of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B, and the first, second, and second Positioning portions 75 for positioning the three exit-side polarizing plates 22R, 22G, and 22B are provided.
Further, the shape of the guide portion 74 may be a recess facing the end portions of the first, second, and third emission-side polarizing plates 22R, 22G, and 22B so that a jig such as tweezers is inserted. Well, not limited to inclined surfaces.

As shown in FIGS. 14 and 15, the takeout port 76 is for taking out the peeled first, second, and third emission-side polarizing plates 22R, 22G, and 22B.
That is, the removed first, second, and third emission-side polarizing plates 22R, 22G, and 22B are taken out from the first, second, and third incidents of the light combining prism 20 attached to the prism mounting portion 58. The direction is parallel to the surfaces 2002, 2004, and 2006.
The guide part 74 and the take-out port 76 are provided on one and the same side part 65 that connects the two side parts 65 provided with the attachment surface 72.
One side portion 65 provided with the guide portion 74 and the takeout port 76 is a side portion along three sides of the lower surface 2022.

As described above, the first, second, and third output-side polarizing plates 22R, 22G, and 22B include the first, second, and third prism-side polarizing plates 52, and the first, second, and third modulations. It is composed of two polarizing plates with a container side polarizing plate 50.
The first, second, and third polarizing plate mounting portions 62R, 62G, and 62B include a prism-side polarizing plate mounting portion 80 and a modulator-side polarized light, each including a mounting surface 72, a guide portion 74, and an extraction port 76. It has the board attachment part 82 (refer FIGS. 10-12, FIG. 19).
The prism-side polarizing plate 50 and the modulator-side polarizing plate 52 are formed in a rectangle having the same shape and the same size.
In the prism side polarizing plate mounting portion 80 and the modulator side polarizing plate mounting portion 82 of the first, second, and third polarizing plate mounting portions 62R, 62G, and 62B, the prism side polarizing plate 52 and the modulator side polarizing plate 50 are provided. Is attached with the long side of the rectangle rotated 90 degrees (FIG. 20).
Thus, forming the prism-side polarizing plate 50 and the modulator-side polarizing plate 52 in a rectangular shape having the same shape and the same size is advantageous in reducing the manufacturing cost of the optical members constituting the polarizing plates.
In the present embodiment, the first, second, and third light modulators 18R, 18G, and 18B are viewed from the directions orthogonal to the first, second, and third incident surfaces 2002, 2004, and 2006 of the light combining prism 20. In this case, the mounting surface 72 is arranged as follows.
That is, as shown in FIG. 20, the mounting surface 72 of the first, second, and third modulator side polarizing plate mounting portions (polarizing plate mounting portions) 82 has first, second, and third light modulations. It arrange | positions so that it may expose to the outer side of the container 18R, 18G, 18B.

Next, assembly of the optical unit 54 will be described.
First, the light combining prism 20 is positioned using a jig, and the lower surface 2022 of the light combining prism 20 is bonded to the prism mounting portion 58 using an ultraviolet curable adhesive, thereby attaching the light combining prism 20 to the light combining portion housing 56. Assemble to.
Next, the first, second, and third emission-side polarizing plates 22R, 22G, and 22B are assembled to the photosynthesis unit housing 56.
As shown in FIG. 19, the output side polarizing plates 22R, 22G, and 22B having adhesive tapes bonded to the two opposite sides are inclined and inserted into the opening 68 from one side of the output side polarizing plates 22R, 22G, and 22B for positioning. Position it against the part 75.
While maintaining this state, the two sides to which the adhesive tapes of the output side polarizing plates 22R, 22G and 22B are bonded are placed on the mounting surface 72, and the output side polarizing plates 22R, 22G and 22B are directed to the mounting surface 72. Press to bond.
Thereby, the 1st, 2nd, 3rd output side polarizing plate 22R, 22G, 22B is each attached to the attachment part 62R, 62G, 62B for 1st, 2nd, 3rd polarizing plates.
That is, the first, second, and third prism side polarizing plates 52 are attached to the prism side polarizing plate mounting portion 80, and the first, second, and third modulator side polarizing plates 50 are connected to the modulator side. It is attached to the polarizing plate attachment portion 82.

Next, the projection optical system 24 is attached to the projection optical system attachment portion 59 of the light combining portion housing 56 via a screw.
Next, the first, second, and third light modulators 18R, 18G, and 18B are assembled to the light combining unit housing 56.
That is, the mounting pins 66 of the light combining unit housing 56 are inserted into the mounting holes 1802 of the light modulators 18R, 18G, and 18B, and the light modulators 18R, 18G, and 18B are transmitted to the light of the projection optical system 24 using a jig. Align in the 6-axis direction with the axis as a reference.
When the positioning is performed, an ultraviolet curable adhesive is filled between the mounting pin 66 and the mounting hole 1802, and the ultraviolet curable adhesive is irradiated with ultraviolet rays to be cured.
Thereby, the assembly of the optical unit 54 is completed.

Next, since the first, second, and third emission-side polarizing plates 22R, 22G, and 22B assembled in the optical unit 54 have deteriorated, new first, second, and third emission-side polarizing plates 22R. , 22G and 22B will be described.
First, the exit-side polarizing plates 22R, 22G, and 22B are removed from the photosynthesis unit housing 56.
As shown in FIG. 21, the jig G is placed between the mounting surface 72 and the first, second, and third emission-side polarizing plates 22 R, 22 G, and 22 B that are mounted on the mounting surface 72 via the guide portion 74. insert.
At this time, since the jig G can be inserted along the inclined surface 7402 formed on the guide portion 74, the operation becomes easy.
The exit side polarizing plates 22R, 22G, and 22B are peeled off from the attachment surface 72 using the jig G as a lever with the place where the jig G contacts the guide portion 74 as a fulcrum.
Further, the jig G is inserted from the opening 73, and the exit side polarizing plates 22 </ b> R, 22 </ b> G, and 22 </ b> B are peeled off from the attachment surface 72 using the jig G as a lever at a position where the jig G contacts the inclined surface 7302.
If the output side polarizing plates 22R, 22G, and 22B are peeled off from the mounting surface 72, the peeled first, second, and third output side polarizing plates 22R, 22G, and 22B are taken out from the takeout port 76.
At this time, the inclined surface 7402 is displaced in a direction gradually separating from the virtual extension surface of the attachment surface 72 as it goes on the virtual extension in the extending direction of the attachment surface 72.
Therefore, the adhesive tape can be easily and reliably separated from the inclined surface 7402 so that the adhesive tape attached to the output side polarizing plates 22R, 22G, and 22B does not adhere to the guide portion 74 by mistake. Improvements are being made.

Next, new first, second, and third emission-side polarizing plates 22R, 22G, and 22B are assembled to the optical unit 54.
In this case, the output side polarizing plates 22R, 22G, and 22B having adhesive tapes bonded to the two opposite sides are inserted from the takeout port 76 toward the positioning portion 75, and one side of the output side polarizing plates 22R, 22G, and 22B is positioned. Position it against the part 75.
While maintaining this state, the two sides to which the adhesive tapes of the output side polarizing plates 22R, 22G and 22B are bonded are placed on the mounting surface 72, and the output side polarizing plates 22R, 22G and 22B are directed to the mounting surface 72. Press to bond.
Thereby, the 1st, 2nd, 3rd output side polarizing plate 22R, 22G, 22B is each attached to the attachment part 62R, 62G, 62B for 1st, 2nd, 3rd polarizing plates.
That is, the first, second, and third prism side polarizing plates 52 are attached to the prism side polarizing plate mounting portion 80, and the first, second, and third modulator side polarizing plates 50 are connected to the modulator side. It is attached to the polarizing plate attachment portion 82.
As shown in FIG. 20, the mounting surface 72 of the first, second, and third modulator side polarizing plate mounting portions (polarizing plate mounting portions) 82 has first, second, and third light modulations. It is exposed outside the containers 18R, 18G, 18B.
Therefore, the location of the first, second, and third modulator-side polarizing plates 50 located on the mounting surface 72 of the exposed first, second, and third modulator-side polarizing plate mounting portions 82 is determined. Pressure can be applied toward the mounting surface 72 using the jig G. This is more advantageous in easily and reliably bonding the first, second, and third modulator-side polarizing plates 50.

According to the present embodiment, the guide portion 74 and the take-out port for removing the first, second, and third emission-side polarizing plates 22R, 22G, and 22B from the attachment surface 72 and bonding them to the attachment surface 72. 76 is provided in the photosynthesis unit housing 56.
Accordingly, the first, second, and third light modulators 18R, 18G, and 18B can be combined without removing them from the light combining unit housing 56, and the first, second, and third output-side polarizing plates 22R, 22G, and 22B can be combined. Replacement for the part housing 56 can be performed.
For this reason, it is of course advantageous to reduce the size and cost as compared with the configuration in which the output side polarizing plate is assembled using a conventional spring member, which is advantageous for simplifying the replacement work of the output side polarizing plate. Become.

In the embodiment, the case where the pressure-sensitive adhesive is used when attaching each of the emission-side polarizing plates 22R, 22G, and 22B to the attachment surface 72 has been described. However, an adhesive may be used as in the present embodiment. It goes without saying that an effect can be obtained.
Further, in the embodiment, the case where each of the output side polarizing plates 22R, 22G, and 22B is configured by two sheets has been described, but each output side polarizing plate may be configured by one sheet, or Of course, the present invention can be applied even if it is composed of three pieces.
Moreover, although the description has been given of the case where the two polarizing plates of the prism side polarizing plate 52 and the modulator side polarizing plate 50 constituting each output side polarizing plate are formed in a rectangle of the same shape and the same size. The same effect can be obtained even if the polarizing plates are not rectangular with the same shape and size.
Further, the present invention can be implemented even when the polarizing plate is exchanged in the opposite direction.
The jig for peeling is tweezers as an example, but other members may be used as long as they are members for peeling and are not limited to tweezers.

  10... Projector device, 18R, 18G, 18B... First, second, third light modulator, 20... Light combining prism, 22R, 22G, 22B. Polarizing plate, 54... Optical unit, 56... Photosynthesis housing, 60 R, 60 G, 60 B... Third polarizing plate mounting portion, 64R, 64G, 64B... First, second and third light modulator mounting portions, 72... Mounting surface, 74... Guide portion, 76.

Claims (11)

First, second, and third optical modulators that are provided for each of the first, second, and third lights having different wavelength regions and that transmit the light by adjusting the polarization state of the light according to image information;
First, second, and third incident surfaces on which the first, second, and third light beams transmitted from the first, second, and third light modulators are incident, and the first and second surfaces A light combining prism having a combining unit that combines the first, second, and third lights incident on the third incident surface; and an output surface that emits the light combined by the combining unit;
A first exit-side polarizing plate disposed between the first light modulator and the first incident surface;
A second output-side polarizing plate disposed between the second light modulator and the second incident surface;
A third output-side polarizing plate disposed between the third light modulator and the third incident surface;
A light combining unit housing to which the first, second, and third light modulators, a light combining prism, and first to third output-side polarizing plates are attached;
The light combining unit housing is provided at a portion facing the first, second, and third incident surfaces of the prism combining unit to which the light combining prism is mounted and the light combining prism mounted on the prism mounting unit. First, second, and third side frame portions,
The first, second, and third side frame portions are respectively attached to the first, second, and third exit-side polarizing plates so as to face the first, second, and third incident surfaces, respectively. The first, second, and third polarizing plate mounting portions and the first, second, and third output-side polarizing plates are surfaces opposite to the surfaces that face the first, second, and third incident surfaces. And first, second, and third light modulator mounting portions to which the first, second, and third light modulators are mounted,
The first, second, and third light modulator mounting portions are the first, second, and third output-side polarizing plates of the first and second light combining prisms that are mounted on the prism mounting portion. Inserted into the first, second, and third polarizing plate attachment portions through the first, second, and third light modulator attachment portions from directions orthogonal to the second and third incident surfaces. Configured to be able to
The first, second, and third polarizing plate attachment portions are attached to the attachment surface to which the first, second, and third emission-side polarizing plates are bonded via an adhesive, and the attachment surface. In addition, a jig is inserted between the first, second, and third output-side polarizing plates and the mounting surface, and the first, second, and third output-side polarizing plates are peeled off from the mounting surface. And the peeled first, second, and third output-side polarizing plates on the first, second, and third incident surfaces of the light combining prism attached to the prism mounting portion. And a take-out port for taking out from the direction parallel to the
An optical unit for a projector apparatus comprising: The first, second, and third emission-side polarizing plates have a rectangular plate shape,
The first, second, and third polarizing plate mounting portions have four side portions corresponding to the four sides of the first, second, and third output-side polarizing plates,
The mounting surface is provided on two of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates,
The guide part and the extraction port are provided on one and the same side part that connects two side parts provided with the mounting surface.
The optical unit for a projector apparatus according to claim 1. The first, second and third light modulators have a rectangular plate shape,
The first, second, and third light modulator attachment portions are configured to attach four corners of the first, second, and third light modulators;
When the first, second, and third light modulators are viewed from directions orthogonal to the first, second, and third incident surfaces of the light combining prism, the first, second, and third light modulators are viewed. The mounting surface of the polarizing plate mounting portion is exposed outside the first, second, and third light modulators,
The optical unit for a projector apparatus according to claim 1. The first, second and third entrance surfaces have a rectangular shape,
The first, second, and third light modulators and the first, second, and third output-side polarizing plates have rectangular plate shapes corresponding to the first, second, and third incident surfaces,
The first, second, and third polarizing plate mounting portions have four side portions corresponding to the four sides of the first, second, and third output-side polarizing plates,
The mounting surface is provided on two of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates,
In addition to the first, second, and third entrance surfaces, and the exit surface, the light combining prism has an upper surface and a lower surface that connect these surfaces,
These first, second, and third entrance surfaces, exit surfaces, top surfaces, and bottom surfaces have a rectangular shape,
A flexible printed circuit board connected to the first, second, and third optical modulators is projected from one of the four sides of the first, second, and third optical modulators.
The first, second, and third light modulators are attached to the first, second, and third light modulator attachment portions so that the flexible printed circuit board is located on the upper surface;
One side portion provided with the guide portion and the extraction port is a side portion along three sides of the lower surface.
The optical unit for a projector apparatus according to claim 1. The first, second, and third output-side polarizing plates include a prism-side polarizing plate that is disposed to face the first, second, and third incident surfaces of the light combining prism, and the first and second polarizing plates. 2, composed of two polarizing plates with a modulator-side polarizing plate disposed opposite to the third optical modulator,
The first, second, and third polarizing plate mounting portions include a prism-side polarizing plate mounting portion and a modulator-side polarizing plate mounting portion that include the mounting surface, the guide portion, and the take-out port, respectively. Have
The optical unit for a projector apparatus according to claim 1, wherein the optical unit is a projector apparatus. The prism side polarizing plate and the modulator side polarizing plate are formed in a rectangle of the same shape and the same size,
In the prism side polarizing plate mounting portion and the modulator side polarizing plate mounting portion of the first, second and third polarizing plate mounting portions, the prism side polarizing plate and the modulator side polarizing plate are It is attached with the long side direction of the rectangle rotated 90 degrees.
The optical unit for a projector apparatus according to claim 4. The first, second, and third emission-side polarizing plates have a rectangular plate shape,
The first, second, and third polarizing plate mounting portions have four side portions corresponding to the four sides of the first, second, and third output-side polarizing plates,
The mounting surface is provided on two of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates,
The attachment surface extends along the sides of the first, second, and third output-side polarizing plates,
The guide portion is formed of an inclined surface that is gradually displaced away from the virtual extension surface of the attachment surface as it goes on the virtual extension in the extending direction of the attachment surface.
The optical unit for a projector apparatus according to claim 1. The first, second, and third emission-side polarizing plates have a rectangular plate shape,
The first, second, and third polarizing plate mounting portions have four side portions corresponding to the four sides of the first, second, and third output-side polarizing plates,
The mounting surface is provided on two of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates,
The attachment surface extends along the sides of the first, second, and third output-side polarizing plates,
The guide portion is provided at one end of the extending direction of the mounting surface,
A jig is inserted between the first, second, and third emission-side polarizing plates and the mounting surface at the other end in the extending direction of the mounting surface, and the first and second are inserted. , An opening for peeling the third output side polarizing plate from the mounting surface is provided,
The optical unit for a projector apparatus according to claim 1. The first, second, and third emission-side polarizing plates have a rectangular plate shape,
The first, second, and third polarizing plate mounting portions have four side portions corresponding to the four sides of the first, second, and third output-side polarizing plates,
The mounting surface is provided on two of the four side portions so as to bond two opposing sides of the first, second, and third emission-side polarizing plates,
The attachment surface extends along the sides of the first, second, and third output-side polarizing plates,
The guide portion is provided at one end of the extending direction of the mounting surface,
The first and second sides of the first, second, and third emission-side polarizing plates are in contact with the side portion located at the other end in the extending direction of the mounting surface. , A positioning portion for positioning the third output side polarizing plate is provided,
The optical unit for a projector apparatus according to claim 1. A projection optical system mounting portion to which a projection optical system is attached is provided at a location of the light combining unit housing corresponding to the emission surface.
The optical unit for a projector apparatus according to claim 1. With an optical unit,
The optical unit is
First, second, and third optical modulators that are provided for each of the first, second, and third lights having different wavelength regions and that transmit the light by adjusting the polarization state of the light according to image information;
First, second, and third incident surfaces on which the first, second, and third light beams transmitted from the first, second, and third light modulators are incident, and the first and second surfaces A light combining prism having a combining unit that combines the first, second, and third lights incident on the third incident surface; and an output surface that emits the light combined by the combining unit;
A first exit-side polarizing plate disposed between the first light modulator and the first incident surface;
A second output-side polarizing plate disposed between the second light modulator and the second incident surface;
A third output-side polarizing plate disposed between the third light modulator and the third incident surface;
A light combining unit housing to which the first, second, and third light modulators, a light combining prism, and first to third output-side polarizing plates are attached;
The light combining unit housing is provided at a portion facing the first, second, and third incident surfaces of the prism combining unit to which the light combining prism is mounted and the light combining prism mounted on the prism mounting unit. First, second, and third side frame portions,
The first, second, and third side frame portions are respectively attached to the first, second, and third exit-side polarizing plates so as to face the first, second, and third incident surfaces, respectively. The first, second, and third polarizing plate mounting portions and the first, second, and third output-side polarizing plates are surfaces opposite to the surfaces that face the first, second, and third incident surfaces. And first, second, and third light modulator mounting portions to which the first, second, and third light modulators are mounted,
The first, second, and third light modulator mounting portions are the first, second, and third output-side polarizing plates of the first and second light combining prisms that are mounted on the prism mounting portion. Inserted into the first, second, and third polarizing plate attachment portions through the first, second, and third light modulator attachment portions from directions orthogonal to the second and third incident surfaces. Configured to be able to
The first, second, and third polarizing plate attachment portions are attached to the attachment surface to which the first, second, and third emission-side polarizing plates are bonded via an adhesive, and the attachment surface. In addition, a jig is inserted between the first, second, and third output-side polarizing plates and the mounting surface, and the first, second, and third output-side polarizing plates are peeled off from the mounting surface. And the peeled first, second, and third output-side polarizing plates on the first, second, and third incident surfaces of the light combining prism attached to the prism mounting portion. And a take-out port for taking out from the direction parallel to the
Projector device.

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