JP2006178260A - Light source device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device capable of completely restraining the trouble that luminance is lowered because glass fiber added to heat resistant resin surfaces floats on the surface of the heat resistant resin and finally adheres to a reflector or other optical components, and to provide a projector. <P>SOLUTION: The light source device 110a has a light source lamp 120 having a light emitting tube 112 and an ellipsoidal reflector 114 reflecting light from the light emitting tube 112 to the side of an area to be illuminated and projects the light nearly parallel with the optical axis 110aax of the light source to the side of the area to be illuminated. The light source device 110a is housed in a light source device housing 140 composed of the heat resistant resin containing the glass fiber inside, and insulating ultraviolet non-transmissive material 142 for restraining the transmission of ultraviolet rays is applied to at least a part irradiated with light from the light source lamp 120 on the inner wall of the light source device housing 140. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light source device and a projector.

  FIG. 7 is a diagram for explaining a conventional projector 1000. FIG. 8 is a diagram for explaining a conventional light source device 110. 8A is a perspective view of the light source device casing 140, FIG. 8B is a perspective view of the light source lamp 120, and FIG. It is a perspective view when attached, FIG.8 (d) is a figure which shows typically the cross section of FIG.8 (c).

  As shown in FIG. 7, the projector 1000 is emitted from the light source device 110, the integrator illumination optical system 150 that equalizes the in-plane light intensity distribution of the light emitted from the light source device 110, and the integrator illumination optical system 150. A color separation light guide optical system 200 that separates light into three color lights of red light, green light, and blue light and guides the light to the illuminated region, and red light and green light emitted from the color separation light guide optical system 200 In addition, three liquid crystal devices 400R, 400G, and 400B as electro-optic modulation devices that modulate three color lights of blue light according to image information, and red light and green light modulated by the three liquid crystal devices 400R, 400G, and 400B. Cross dichroic prism 500 that synthesizes three color lights of blue and blue light, and a projection optical system that projects the light synthesized by the cross dichroic prism 500 And a 00 and (for the optical system of the projector, for example, see Patent Document 1.).

  The integrator illumination optical system 150 corresponds to a first lens array 152 having a plurality of first small lenses that separate light from the light source device 110 into a plurality of partial light beams, and a plurality of first small lenses of the first lens array 152. A second lens array 154 having a plurality of second small lenses, and a superimposing lens 156 that superimposes light from the second lens array 154 on the illuminated area.

As shown in FIGS. 7 and 8, the light source device 110 includes a light source lamp 120 that emits focused light toward an illuminated area, and a collimating lens 130 that converts the focused light from the light source lamp 120 into substantially parallel light. And a light source device housing 140 that houses the light source lamp 120 and the collimating lens 130.
The light source lamp 120 includes an arc tube 112, an ellipsoidal reflector 114 as a reflector that reflects the light from the arc tube 112 toward the illuminated region, and an elliptical light emitted from the arc tube 112 toward the illuminated region. And an auxiliary mirror 116 that reflects toward the surface reflector 114.

  By the way, in recent years, since the brightness of projectors has increased and high-luminance arc tubes have been used, the light source device casing 140 is in a high temperature state. For this reason, as a material for the light source device casing 140, a resin in which glass fibers are added to a heat-resistant resin such as a liquid crystal polymer or polyphenylene sulfide to improve mechanical properties has been used.

In recent years, however, projectors have become increasingly brighter, and arc tubes with higher brightness have come to be used. Therefore, ultraviolet rays are also strong on the inner wall of a light source device housing that should not be irradiated with ultraviolet rays. It has come to be irradiated. For this reason, the inner wall of the light source device housing 140 is in a state where it is irradiated with ultraviolet rays in addition to being in a high temperature state. As a result, deterioration of the heat resistant resin progresses, and the glass fiber added to the heat resistant resin rises and floats on the surface of the heat resistant resin and finally adheres to the ellipsoidal reflector 114, the collimating lens 130, etc. There was a problem that decreased.
In addition, ultraviolet rays that have passed through the ellipsoidal reflector 114 and ultraviolet rays that have been emitted from the light source device 110 (normally, an ultraviolet cut filter is provided on the emission side of the light source device 110, but some ultraviolet rays cannot be completely blocked. As a result, the light source device housing is also provided on the inner wall of the optical component housing 100 that houses the optical components disposed on the optical path from the light source device 110 to the three liquid crystal devices 400R, 400G, and 400B. There is also a problem that a problem similar to the problem occurring in the inner wall of 140 may occur.

  Therefore, in order to solve the above-described problem, conventionally, a portion of the inner wall of the light source device casing 140 that is irradiated with ultraviolet rays from the light source lamp 120 is covered with a metal plate. This makes it difficult to irradiate the inner wall of the light source device housing 140 with ultraviolet rays. Therefore, the above-described problem, that is, the deterioration of the heat-resistant resin progresses, and the glass fiber added to the heat-resistant resin becomes the surface of the heat-resistant resin. The problem that the brightness is lowered due to floating on the surface and finally adhering to the ellipsoidal reflector or other optical components is suppressed.

JP 2000-347293 A (FIG. 14)

  However, when the light source device housing 140 has a complicated shape, it is not easy to manufacture the metal plate so as to cover the light source device housing 140 without a gap. Further, the metal plate needs to be configured so as not to contact the lead wire 113 on the illuminated region side of the two lead wires of the arc tube 112, and therefore, the metal plate has a predetermined opening. It is necessary to provide. For this reason, in the light source device 110 described above, it is not possible to cover the entire surface of the inner wall of the light source device housing 140 with the ultraviolet light from the light source lamp 120 with the metal plate. As a result, the glass fiber added to the heat-resistant resin floats on the surface of the heat-resistant resin and floats, and finally adheres to the ellipsoidal reflector and other optical components, thereby reducing the brightness sufficiently. There was a problem that could not be done. Moreover, almost no measures have been taken for the optical component casing 100.

  These problems are not only problems that occur in projectors that use liquid crystal devices and light source devices that are used in such projectors, but are those that are used in projectors that use other electro-optic modulators and such projectors. The same problem occurs in the light source device. In addition, these problems are not only problems that occur only in a light source device that uses an ellipsoidal reflector as a reflector, but also occur in a light source device that uses a parabolic reflector as a reflector, for example.

  Therefore, the present invention was made to solve these problems, and the glass fiber added to the heat-resistant resin floats on the surface of the heat-resistant resin, and finally floats on a reflector or other optical fiber. It is an object of the present invention to provide a light source device and a projector that can sufficiently suppress the problem that luminance decreases due to adhesion to components and the like.

  The light source device of the present invention includes a light source lamp having a light emitting tube and a reflector that reflects light from the light emitting tube toward the illuminated region side, and light substantially parallel to the light source optical axis is directed to the illuminated region side. In the light source device that emits toward the light source, the light source device is housed in a light source device housing made of a heat-resistant resin containing glass fiber inside, and at least from the light source lamp among the inner walls of the light source device housing. An insulating ultraviolet opaque material that suppresses transmission of ultraviolet rays is applied to the portion irradiated with light.

  For this reason, according to the light source device of the present invention, even when the light source device housing has a complicated shape, the insulating ultraviolet opaque material is formed without gaps corresponding to the shape of the light source device housing. Can be applied. Further, according to the light source device of the present invention, it is possible to apply the insulating ultraviolet opaque material without worrying about the presence of the lead wire on the illuminated region side in the arc tube. As a result, the housing for the light source device can be applied. A portion of the inner wall of the body that is irradiated with ultraviolet rays from the light source lamp can be covered with an insulating ultraviolet opaque material over the entire surface.

  For this reason, according to the light source device of the present invention, the glass fiber added to the heat resistant resin rises and floats on the surface of the heat resistant resin, and finally adheres to a reflector or other optical component to reduce the luminance. Can be sufficiently suppressed.

  In the light source device of the present invention, the insulating ultraviolet opaque material applied to the inner wall of the light source device casing preferably has an ultraviolet transmittance of 30% or less.

  In the light source device of the present invention, the ultraviolet opaque material is preferably a black paint.

  By comprising in this way, the transmittance | permeability of an ultraviolet-ray can further be reduced.

  In the light source device of the present invention, it is preferable that the black paint contains a complex oxide of copper, iron and manganese.

  By comprising in this way, a black coating material can be used as the insulating ultraviolet-opaque material whose ultraviolet-ray transmittance is low enough.

  In the light source device of the present invention, the thickness of the black paint is preferably in the range of 10 μm to 200 μm.

  By configuring in this way, sufficient blackness and ultraviolet impermeability are realized.

  In the light source device of the present invention, it is preferable that the black paint is baked by the heat generated by the light source lamp.

  By baking the black paint using the heat generated by the light source lamp, it is possible to simultaneously perform fixing of the black paint on the coated surface and confirmation of the lighting operation of the light source lamp after baking of the black paint. Therefore, it is possible to reduce the work process.

  Another light source device of the present invention includes a light source lamp having a light emitting tube and a reflector that reflects light from the light emitting tube toward the illuminated region side, and emits light substantially parallel to a light source optical axis to the illuminated region. In the light source device that emits toward the side, the light source device is housed in a light source device housing made of a heat-resistant resin containing glass fiber, and at least the light source lamp of the inner wall of the light source device housing Insulating ultraviolet-opaque ceramic material that suppresses the transmission of ultraviolet rays is sprayed on the portion irradiated with light from.

  Therefore, according to another light source device of the present invention, even when the light source device housing has a complicated shape, an insulating ultraviolet opaque ceramic material corresponding to the shape of the light source device housing Can be sprayed without gaps. In addition, according to another light source device of the present invention, it is possible to thermally spray an insulating ultraviolet-opaque ceramic material without worrying about the presence of the lead wire on the illuminated region side in the arc tube. The portion of the inner wall of the apparatus housing that is irradiated with ultraviolet rays from the light source lamp can be covered with an insulating ultraviolet-opaque ceramic material over the entire surface.

  For this reason, according to another light source device of the present invention, as in the case of the light source device of the present invention described above, the glass fiber added to the heat resistant resin floats on the surface of the heat resistant resin and finally floats. Can sufficiently suppress the problem that the luminance decreases due to adhesion to reflectors and other optical components.

  In the light source device of the present invention, the insulating ultraviolet-opaque ceramic material sprayed on the inner wall of the light source device housing preferably has an ultraviolet transmittance of 30% or less.

  In another light source device of the present invention, the ultraviolet light opaque ceramic material preferably exhibits a black color.

  By comprising in this way, the transmittance | permeability of an ultraviolet-ray can further be reduced.

  Still another light source device of the present invention includes a light source lamp having a light emitting tube and a reflector that reflects light from the light emitting tube toward the illuminated region, and emits light substantially parallel to a light source optical axis. In the light source device that emits toward the region side, the light source device is housed in a light source device housing made of a heat-resistant resin containing glass fiber inside, and at least the light source among the inner walls of the light source device housing The portion irradiated with light from the lamp is covered with an insulating ultraviolet-opaque ceramic plate that suppresses transmission of ultraviolet rays.

  Therefore, according to yet another light source device of the present invention, it is possible to dispose an insulating ultraviolet-opaque ceramic plate in a state where the distance from the lead wire on the illuminated region side in the arc tube is narrowed. Therefore, the portion of the inner wall of the housing for the light source device that is irradiated with the ultraviolet rays from the light source lamp can be covered almost entirely with the insulating ultraviolet-opaque ceramic plate.

  Therefore, according to still another light source device of the present invention, the glass fiber added to the heat resistant resin is raised on the surface of the heat resistant resin as in the case of the light source device of the present invention and other light source devices described above. It is possible to sufficiently suppress the problem that the brightness is lowered due to the floating and eventually adhering to the reflector or other optical components.

  In the light source device of the present invention, the insulating ultraviolet-opaque ceramic plate that covers the inner wall of the light source device housing preferably has an ultraviolet transmittance of 30% or less.

  In still another light source device of the present invention, it is preferable that the ultraviolet-opaque ceramic plate has a black color.

  By comprising in this way, the transmittance | permeability of an ultraviolet-ray can further be reduced.

  A projector according to the present invention includes a light source device according to the present invention, another light source device according to the present invention, or yet another light source device according to the present invention, an electro-optic modulation device that modulates light from the light source device according to image information, And a projection optical system for projecting light modulated by the electro-optic modulation device.

  For this reason, according to the projector of the present invention, the projector is provided with the light source device in which the luminance is sufficiently prevented from being lowered due to the deterioration of the heat resistant resin. Become.

  In the projector according to the aspect of the invention, the projector may further include an optical component housing that houses an optical component disposed on an optical path from the light source device to the electro-optic modulation device, and at least one of inner walls of the optical component housing. The inner wall of the part is preferably coated with an insulating ultraviolet opaque material that suppresses the transmission of ultraviolet rays.

  In a projector, for example, there is ultraviolet light that passes through the back surface of the reflector and ultraviolet light that leaks from an ultraviolet cut filter disposed on the emission side of the light source device. The glass fiber added to the heat-resistant resin that constitutes the optical component housing that houses the optical components placed on the optical path to the device floats on the surface of the heat-resistant resin and eventually floats on the various optical elements in the projector There may be a problem that image quality deteriorates due to adhesion to parts.

  However, by configuring as described above, it is possible to protect the optical component housing from, for example, ultraviolet rays that are transmitted through the back surface portion of the reflector and ultraviolet rays that are leaked from the ultraviolet cut filter disposed on the emission side of the light source device. As a result, the glass fiber added to the heat-resistant resin floats up and floats on the surface of the heat-resistant resin, and finally adheres to various optical components in the projector, so that the image quality is sufficiently reduced. .

  The insulating ultraviolet-opaque material may be applied to the entire inner wall of the optical component housing, or the ultraviolet light or light source device that transmits the back portion of the reflector on the inner wall of the optical component housing. You may apply | coat only to the part corresponding to the ultraviolet-ray which leaks from the ultraviolet-ray cut filter arrange | positioned at the injection | emission side.

  Hereinafter, a light source device and a projector according to the present invention will be described based on embodiments shown in the drawings.

Embodiment 1
FIG. 1 is a diagram for explaining a projector 1000a according to the first embodiment. FIG. 2 is a diagram for explaining the light source device 110a according to the first embodiment. 2A is a perspective view of the light source device casing 140, FIG. 2B is a perspective view of the light source lamp 120, and FIG. It is a perspective view when attached, FIG.2 (d) is a figure which shows typically the cross section of FIG.2 (c).
In the following description, three directions orthogonal to each other are defined as a z-axis direction (light source optical axis 110aax direction in FIG. 1), an x-axis direction (a direction parallel to the paper surface in FIG. 1 and perpendicular to the z-axis) and y, respectively. An axial direction (a direction perpendicular to the paper surface in FIG. 1 and perpendicular to the z-axis).

As shown in FIG. 1, a projector 1000a according to the first embodiment includes a light source device 110a, an integrator illumination optical system 150 that equalizes an in-plane light intensity distribution of light emitted from the light source device 110a, and an integrator illumination optical system. The color separation light guide optical system 200 that separates the light emitted from 150 into three color lights of red light, green light, and blue light and guides the light to the illuminated region, and the color separation light guide optical system 200 Modulated by three liquid crystal devices 400R, 400G, and 400B as electro-optic modulation devices that modulate three color lights of red light, green light, and blue light according to image information, and three liquid crystal devices 400R, 400G, and 400B. The cross dichroic prism 500 that combines the three color lights of red light, green light, and blue light, and the cross dichroic prism 500 And a projection optical system 600 that projects.
The various optical components arranged on the optical path from the light source device 110a to the liquid crystal devices 400R, 400G, and 400B are housed in the optical component casing 100. An opening is provided in a portion of the optical component casing 100 facing the projection optical system 600.

  The integrator illumination optical system 150 corresponds to a first lens array 152 having a plurality of first small lenses that separate light from the light source device 110 a into a plurality of partial light beams, and a plurality of first small lenses of the first lens array 152. A second lens array 154 having a plurality of second small lenses, and a superimposing lens 156 that superimposes light from the second lens array 154 on the illuminated area. A polarization conversion element 160 for converting the illumination light beam into polarized light is disposed on the optical path between the second lens array 154 and the superimposing lens 156.

As shown in FIGS. 1 and 2, the light source device 110a includes a light source lamp 120 that emits focused light toward an illuminated area, and a collimating lens 130 that converts the focused light from the light source lamp 120 into substantially parallel light. And is housed in a light source device housing 140.
The light source lamp 120 includes an arc tube 112, an ellipsoidal reflector 114 as a reflector that reflects the light from the arc tube 112 toward the illuminated region, and an elliptical light emitted from the arc tube 112 toward the illuminated region. And an auxiliary mirror 116 that reflects toward the surface reflector 114.

  The color separation light guide optical system 200 separates the illumination light beam emitted from the integrator illumination optical system 150 into three color lights of red light, green light, and blue light, and each color light is a liquid crystal device 400R to be illuminated. It has a function of leading to 400G and 400B. The first dichroic mirror 210 reflects red light and transmits green light and blue light. The red light reflected by the first dichroic mirror 210 is further reflected by the reflection mirror 230 and passes through the field lens 280R to illuminate the liquid crystal device 400R for red light.

  The field lens 280R condenses the partial light beams from the first superimposing lens 160 so as to illuminate the liquid crystal device 400R for red light. Usually, each partial light beam is set to be a substantially parallel light beam. The field lenses 280G and 280B disposed in front of the other liquid crystal devices 400G and 400B are configured similarly to the field lens 280R.

  The green light that has passed through the first dichroic mirror 210 is reflected by the second dichroic mirror 220, passes through the field lens 280G, and illuminates the liquid crystal device 400G for green light. On the other hand, the blue light that has passed through the first dichroic mirror 210 passes through the second dichroic mirror 220 and passes through the relay lens 260, the incident-side reflection mirror 240, the relay lens 270, the emission-side reflection mirror 250, and the field lens 280B. The liquid crystal device 400B for blue light is illuminated.

The liquid crystal devices 400R, 400G, and 400B modulate the incident illumination light beam according to image information, and are the illumination target of the light source device 110a. Although not shown, an incident-side polarizing plate is interposed between the color separation light guide optical system 200 and each of the liquid crystal devices 400R, 400G, and 400B, and crosses each of the liquid crystal devices 400R, 400G, and 400B. Between the dichroic prism 500, an exit side polarizing plate is interposed. Then, the incident-side polarizing plate, the liquid crystal devices 400R, 400G, and 400B, and the emission-side polarizing plate perform light modulation of each color light incident thereon.
The liquid crystal devices 400R, 400G, and 400B are a pair of transparent glass substrates in which a liquid crystal that is an electro-optical material is hermetically sealed. For example, a polysilicon TFT is used as a switching element and incident according to given image information. Modulates the polarization direction of one type of linearly polarized light emitted from the side polarizing plate.

  The cross dichroic prism 500 is an optical element that forms a color image by synthesizing an optical image modulated for each color light emitted from the exit side polarizing plate. The cross dichroic prism 500 has a substantially square shape in plan view in which four right-angle prisms are bonded together, and a dielectric multilayer film is formed on a substantially X-shaped interface in which the right-angle prisms are bonded together. The dielectric multilayer film formed at one interface having a substantially X shape reflects red light, and the dielectric multilayer film formed at the other interface reflects blue light. The red and blue light is reflected by the dielectric multilayer film and aligned with the traveling direction of the green light, so that the three color lights are synthesized.

  The color image emitted from the cross dichroic prism 500 is enlarged and projected by the projection optical system 600 to form a large screen image on the screen SCR.

  In the projector 1000a configured as described above, the light source device casing 140 is made of a heat-resistant resin containing glass fiber therein. An insulating ultraviolet opaque material 142 is applied to a portion of the inner wall of the light source device housing 140 that is irradiated with ultraviolet rays from the light source lamp 120 (see FIGS. 1 and 2D). .

  For this reason, according to the light source device 110a according to the first embodiment, even when the light source device casing 140 has a complicated shape, the insulating ultraviolet impermeability does not correspond to the shape of the light source device casing 140. The conductive material 142 can be applied without a gap. Further, according to the light source device 110a according to the first embodiment, an insulating ultraviolet opaque material without worrying about the presence of the lead wire 113 (see FIG. 2B) on the illuminated region side in the arc tube 112. 142 can be applied, and as a result, the portion of the inner wall of the light source device housing 140 that is irradiated with ultraviolet rays from the light source lamp 120 can be covered with the insulating ultraviolet opaque material 142 over the entire surface. It becomes like this.

  In the light source device 110a according to the first embodiment, a black paint (inorganic coat EF-4076B manufactured by Suncoat Co., Ltd.) containing a composite oxide of copper, iron and manganese is used as the insulating ultraviolet opaque material 142. Yes. FIG. 3 is a diagram showing a light transmission spectrum of the insulating ultraviolet opaque material 142. As shown in FIG. 3, the insulating ultraviolet opaque material 142 has an ultraviolet transmittance of 1% or less that leads to deterioration of the heat-resistant resin, and is hardly transmitted.

  Therefore, according to the light source device 110a according to the first embodiment, the glass fiber added to the heat-resistant resin floats on the surface of the heat-resistant resin and finally floats on the ellipsoidal reflector 114, the collimating lens 120, and the like. It is possible to sufficiently suppress the problem that the brightness decreases due to adhesion.

  Further, according to the light source device 110a according to the first embodiment, since the insulating ultraviolet opaque material 142 is a black paint, the ultraviolet transmittance can be further reduced.

  In addition, according to the light source device 110a according to the first embodiment, as described above, the insulating ultraviolet absorbing material 142 uses a black paint containing a composite oxide of copper, iron, and manganese. Insulating ultraviolet opaque material with sufficiently low transmittance can be obtained.

  The film thickness of the insulating ultraviolet opaque material 142 is, for example, 20 μm. For this reason, according to the light source device 110a according to the first embodiment, sufficient blackness and ultraviolet light impermeability are realized.

  In the light source device 110a according to the first embodiment, the black paint is baked by the heat generated by the light source lamp 120. By baking the black paint using the heat generated by the light source lamp 120, it is possible to simultaneously perform fixing of the black paint on the application surface and confirmation of the lighting operation of the light source lamp 120 after baking of the black paint. Therefore, the work process can be reduced.

  According to the projector 1000a according to the first embodiment, since the light source device 110a in which the decrease in luminance due to the deterioration of the heat resistant resin is sufficiently suppressed is provided, the projector in which the luminance does not decrease over a long period of time. It becomes.

[Embodiment 2]
FIG. 4 is a cross-sectional view schematically showing the light source device 110b according to the second embodiment.
The light source device 110b according to the second embodiment has substantially the same configuration as the light source device 110a according to the first embodiment, but is irradiated with ultraviolet rays from the light source lamp 120 on the inner wall of the light source device housing 140. The material covering the part is different. That is, in the light source device 110b according to the second embodiment, the insulating ultraviolet opaque ceramic material 144 is sprayed.

  As described above, in the light source device 110b according to the second embodiment, the material that covers the portion of the inner wall of the light source device casing 140 that is irradiated with the ultraviolet light from the light source lamp 120 is the light source device 110a according to the first embodiment. Although different from the case, the insulating UV-impermeable ceramic material 144 is sprayed on the portion of the inner wall of the light source device housing 140 that is irradiated with UV light from the light source lamp 120. Even when the device housing 140 has a complicated shape, it is possible to thermally spray the insulating ultraviolet-opaque ceramic material without a gap corresponding to the shape of the light source device housing 140. In addition, according to the light source device 110b according to the second embodiment, the insulating ultraviolet-opaque ceramic material 144 is formed without worrying about the presence of the lead wire 113 (not shown) on the illuminated region side in the arc tube 112. As a result, it is possible to cover the entire surface of the inner wall of the light source device casing 140 irradiated with ultraviolet rays from the light source lamp 120 with an insulating ultraviolet opaque ceramic material. Become.

  For this reason, according to the light source device 110b according to the second embodiment, as in the case of the light source device 110a according to the first embodiment, the glass fiber added to the heat resistant resin floats on the surface of the heat resistant resin and floats. Specifically, it is possible to sufficiently suppress the problem that the luminance decreases due to adhesion to the ellipsoidal reflector 114, the collimating lens 130, and the like.

[Embodiment 3]
FIG. 5 is a cross-sectional view schematically showing the light source device 110c according to the third embodiment.
The light source device 110c according to the third embodiment has substantially the same configuration as the light source device 110a according to the first embodiment, but is irradiated with ultraviolet rays from the light source lamp 120 on the inner wall of the light source device casing 140. The material covering the part is different. That is, in the light source device 110c according to the third embodiment, the insulating ultraviolet-opaque ceramic plate 146 is covered.

  As described above, in the light source device 110c according to the third embodiment, the material that covers the portion of the inner wall of the light source device casing 140 that is irradiated with the ultraviolet light from the light source lamp 120 is the light source device 110a according to the first embodiment. Unlike the case, the portion of the inner wall of the light source device housing 140 that is irradiated with ultraviolet rays from the light source lamp 120 is covered with an insulating ultraviolet opaque ceramic plate 146. Since the insulating ultraviolet-opaque ceramic plate 146 can be disposed in a state in which the space between the light emitting tube 112 and the lead wire 113 (not shown) on the illuminated region side is narrow, The portion of the inner wall of the housing 140 that is irradiated with ultraviolet rays from the light source lamp 120 is covered with an insulating ultraviolet-opaque ceramic plate 146 over almost the entire surface. It can be.

  For this reason, according to the light source device 110c according to the third embodiment, as in the case of the light source device 110a according to the first embodiment, the glass fiber added to the heat resistant resin floats on the surface of the heat resistant resin and floats. Specifically, it is possible to sufficiently suppress the problem that the luminance decreases due to adhesion to the ellipsoidal reflector 114, the collimating lens 130, and the like.

[Embodiment 4]
FIG. 6 is a diagram for explaining a projector 1000b according to the fourth embodiment.
The projector 1000b according to the fourth embodiment has substantially the same configuration as the projector 1000a according to the first embodiment, but includes optical components arranged on the optical path from the light source device 110a to the liquid crystal devices 400R, 400G, and 400B. An insulating ultraviolet opaque material 104 that suppresses the transmission of ultraviolet rays is also applied to the inner wall of the optical component housing 100 to be housed.

  For this reason, according to the projector 1000b according to the fourth embodiment, the optical component casing 100 is protected from, for example, ultraviolet rays that pass through the back surface of the elliptical reflector 114 or ultraviolet rays that leak from the emission side of the light source device 110a. Therefore, the glass fiber added to the heat-resistant resin can be sufficiently prevented from floating on the surface of the heat-resistant resin and finally adhering to various optical components in the projector to deteriorate the image quality. Become.

  Although the light source device and the projector of the present invention have been described based on the above embodiments, the present invention is not limited to the above embodiments, and can be implemented in various modes without departing from the scope of the invention. For example, the following modifications are possible.

(1) Although the projectors 1000a and 1000b in the above embodiments are transmissive projectors, the present invention is not limited to this. The present invention can also be applied to a reflection type projector. Here, “transmission type” means that an electro-optic modulation device as a light modulation means, such as a transmission type liquid crystal device, transmits light, and “reflection type” This means that an electro-optic modulation device as a light modulation means, such as a reflective liquid crystal device, is a type that reflects light. Even when the present invention is applied to a reflective projector, the same effect as that of a transmissive projector can be obtained.

(2) Although the projectors 1000a and 1000b of the above embodiments use a liquid crystal device as an electro-optic modulation device, the present invention is not limited to this. In general, the electro-optic modulation device may be any device that modulates incident light in accordance with image information, and a micromirror light modulation device or the like may be used. For example, a DMD (digital micromirror device) (trademark of TI) can be used as the micromirror light modulator.

(3) The light source devices 110a to 110c and the projectors 1000a and 1000b according to the above-described embodiments serve as the light source lamp 120 and the ellipsoidal reflector 114 that reflects light from the arc tube 112 toward the illuminated area. And the auxiliary mirror 116 that reflects the light emitted from the arc tube 112 toward the illuminated region toward the arc tube, but the present invention is not limited to this. It is also possible to use a light source lamp that does not have an auxiliary mirror.

(4) The light source devices 110a to 110c and the projectors 1000a and 1000b according to the above embodiments are an ellipsoidal reflector 114 and a collimating lens as a light source device that emits light substantially parallel to the light source optical axis toward the illuminated area. Although the light source device having the configuration using 130 is described, the present invention is not limited to this, and for example, a light source optical axis such as a light source device using a parabolic reflector instead of an ellipsoidal reflector and a collimating lens. As long as the light source device is configured to emit light substantially parallel to the light toward the illuminated area.

(5) In the projector 1000b according to the fourth embodiment, the case where the insulating ultraviolet opaque material 104 is applied to the entire inner wall of the optical component casing 100 has been described as an example. It is not limited. For example, the insulating ultraviolet-opaque material 104 is a portion corresponding to ultraviolet rays that are transmitted through the back portion of the elliptical reflector 114 on the inner wall of the optical component housing 100 and ultraviolet rays that are leaked from the emission side of the light source device 110a. It may be applied only to.

(6) In addition, it can be said that the present invention can be applied to a front projection projector that projects from the side that observes the projected image, and a rear projection projector that projects from the side opposite to the side that observes the projected image. Not too long.

FIG. 3 is a diagram for explaining a projector 1000a according to the first embodiment. The figure shown in order to demonstrate the light source device 110a which concerns on Embodiment 1. FIG. The figure which shows the light transmission spectrum of the ultraviolet-ray impervious material 142. FIG. Sectional drawing which shows typically the light source device 110b which concerns on Embodiment 2. FIG. Sectional drawing which shows typically the light source device 110c which concerns on Embodiment 3. FIG. FIG. 10 is a diagram for explaining a projector 1000b according to a fourth embodiment. The figure shown in order to demonstrate the projector 1000 of the past. The figure shown in order to demonstrate the conventional light source device 110. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Optical part housing | casing, 104,142 ... Insulating ultraviolet opaque material, 110, 110a, 110b, 110c ... Light source device, 110aax, 110ax ... Light source optical axis, 112 ... Arc tube, 114 ... Ellipsoidal reflector 116 ... Auxiliary mirror, 120 ... Light source lamp, 130 ... Parallelizing lens, 140 ... Housing for light source device, 144 ... Insulating ultraviolet opaque ceramic material, 146 ... Insulating ultraviolet opaque ceramic plate, 150 ... Integrator illumination optical system, 152 ... first lens array, 154 ... second lens array, 156 ... superimposed lens, 160 ... polarization conversion element, 200 ... color separation light guide optical system, 210,220 ... dichroic mirror, 230,240 , 250 ... reflective mirrors, 260, 270 ... relay lenses, 280R, 280G, 280B ... Rudorenzu, 400R, 400G, 400B ... liquid crystal device, 500 ... cross dichroic prism 600 ... projection optical system, 1000,1000A, 1000b ... projector

Claims (11)

In a light source device having a light source lamp having a light-emitting tube and a reflector that reflects light from the light-emitting tube toward the illuminated region, and emitting light substantially parallel to a light source optical axis toward the illuminated region ,
The light source device is housed in a light source device housing made of a heat resistant resin containing glass fiber inside,
A light source characterized in that an insulating ultraviolet opaque material that suppresses the transmission of ultraviolet rays is applied to at least a portion irradiated with light from the light source lamp in the inner wall of the light source device casing. apparatus. The light source device according to claim 1,
The light source device, wherein the ultraviolet opaque material is a black paint. The light source device according to claim 2,
The light source device, wherein the black paint contains a complex oxide of copper, iron and manganese. The light source device according to claim 2 or 3,
The film thickness of the black paint is in a range of 10 μm to 200 μm. The light source device according to claim 4,
The light source device, wherein the black paint is baked by heat generation of the light source lamp. In a light source device having a light source lamp having a light-emitting tube and a reflector that reflects light from the light-emitting tube toward the illuminated region, and emitting light substantially parallel to a light source optical axis toward the illuminated region ,
The light source device is housed in a light source device housing made of a heat resistant resin containing glass fiber inside,
An insulating ultraviolet impervious ceramic material that suppresses transmission of ultraviolet rays is sprayed on at least a portion of the inner wall of the light source device housing that is irradiated with light from the light source lamp. Light source device. The light source device according to claim 6,
The ultraviolet light impermeable ceramic material has a black color, and is a light source device. In a light source device having a light source lamp having a light-emitting tube and a reflector that reflects light from the light-emitting tube toward the illuminated region, and emitting light substantially parallel to a light source optical axis toward the illuminated region ,
The light source device is housed in a light source device housing made of a heat resistant resin containing glass fiber inside,
A light source characterized in that at least a portion of the inner wall of the light source device housing that is irradiated with light from the light source lamp is covered with an insulating ultraviolet-opaque ceramic plate that suppresses transmission of ultraviolet rays. apparatus. The light source device according to claim 8,
The ultraviolet light impervious ceramic plate has a black color, and is a light source device.   10. The light source device according to claim 1, an electro-optic modulation device that modulates light from the light source device according to image information, and projection optics that projects light modulated by the electro-optic modulation device. And a projector. The projector according to claim 10, wherein
An optical component housing for storing an optical component disposed on an optical path from the light source device to the electro-optic modulation device;
A projector characterized in that an insulating ultraviolet opaque material that suppresses transmission of ultraviolet rays is applied to at least some of the inner walls of the optical component casing.

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