JP2011119049A - Light source device and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device and a projector which restrain a reduction in luminance, contribute to thinning, and have a secondary mirror and a light-emitting tube that are hard to drop with a high resistance against vibration and shock. <P>SOLUTION: A light source device 10 comprises a light-emitting tube 20 having a light-emitting section 22, a reflector 30 having a shape whose one side is deleted when it is cut off at a predetermined plane S and reflecting light outputted from the light-emitting section 22 to an illuminated area side, a secondary mirror 40 that is disposed in one side of the light-emitting tube 20 and reflects light outputted from the light-emitting section 22 to the one side to a side of the light-emitting section 22, and a holding member 50 disposed on a side opposite to the illuminated area side provided so as to be bridged between the external surface sides of the reflector 30 and the secondary mirror 40, in which an adhesive C is disposed among the reflector 30, secondary mirror 40, and the holding member 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

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

  Conventionally, as a light source device used for a projector, a light emitting tube having a light emitting part and a reflector having a shape in which one side is deleted when cut by a predetermined plane and reflects light emitted from the light emitting part to the illuminated area side And a secondary mirror that is disposed on one side of the light emitting part in the arc tube and reflects light emitted from the light emitting part to the light emitting part side is known (for example, see Patent Document 1).

  According to such a configuration, it is possible to reduce the thickness by deleting one side of the reflector. On the other hand, the secondary mirror is arranged on one side of the light emitting unit to effectively use the light emitted from the light emitting unit. As a result, a decrease in luminance is suppressed. In such a light source device, for example, the secondary mirror is fixed to the arc tube with an adhesive, and the arc tube is fixed to the reflector with an adhesive.

JP 2007-335196 A

  However, in the light source device having the above-described configuration, since one side of the reflector, that is, the side where the secondary mirror is located is deleted, even if the secondary mirror is fixed to the luminous tube, what is the luminous tube of the secondary mirror? The opposite side is not supported by a reflector or the like. For this reason, there is a problem that the secondary mirror is easily dropped from the arc tube and has low resistance to vibration and impact.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A light source device according to this application example has a light-emitting tube having a light-emitting portion and a shape in which one side is deleted when cut at a predetermined plane, and the light emitted from the light-emitting portion is illuminated. A reflector that reflects to the region side, a secondary mirror that is disposed on the one side of the arc tube and reflects light emitted from the light emitting unit to the one side, and the illuminated region side A holding member disposed on the opposite side and provided so as to straddle the outer surface side of the reflector and the outer surface side of the sub mirror, and between the reflector and the sub mirror and the holding member The adhesive is arranged.

  According to this configuration, one side of the reflector is removed to make it thinner, but the light emitted from the light emitting portion of the arc tube to one side is reflected by the secondary mirror and used effectively. Accordingly, it is possible to reduce the thickness while suppressing a decrease in luminance. Here, a holding member is provided on the opposite side to the illuminated region side so as to straddle the outer surface side of the reflector and the outer surface side of the sub mirror, and an adhesive is provided between the reflector and the sub mirror and the holding member. Is arranged. For this reason, the sub mirror and the reflector are fixed to each other by the holding member and the adhesive. This makes it difficult for the secondary mirror to fall off, and improves resistance to vibration and impact. As a result, it is possible to provide a light source device that suppresses a decrease in luminance and is thinned, and that has a high resistance to vibration and impact since the secondary mirror is less likely to drop off.

  Application Example 2 In the light source device according to the application example, the arc tube includes a sealing portion that extends along an illumination optical axis on a side opposite to the illuminated region side of the light emitting portion. The reflector has a first base for fixing the sealing part, and the secondary mirror has a second base for fixing the secondary mirror to the sealing part, and holds the holding part. The member is preferably provided from the outer surface side of the second base part to at least a part of the outer surface side of the first base part.

  According to this configuration, the arc tube is fixed to the first base portion of the reflector at the sealing portion, and the secondary mirror is fixed to the sealing portion of the arc tube at the second base portion. Furthermore, a holding member is provided and an adhesive is disposed from the outer surface side of the second base portion to at least a part of the outer surface side of the first base portion. For this reason, the arc tube, the reflector, and the secondary mirror are fixed and held together by the holding member and the adhesive. As a result, the secondary mirror and arc tube can be prevented from falling off and the resistance to vibration and impact can be improved.

  Application Example 3 In the light source device according to the application example described above, it is preferable that the holding member is provided so as to cover an outer surface side of the first base portion and an outer surface side of the second base portion. .

  According to this configuration, since the holding member covers the outer surface side of the first base portion and the outer surface side of the second base portion, the region where the adhesive is disposed can be further increased. Thereby, since the reflector and the secondary mirror are more firmly fixed, it is possible to more reliably suppress the secondary mirror and the arc tube from falling off and to further improve the resistance to vibration and impact.

  Application Example 4 In the light source device according to the application example, the holding member is an end surface of the first base portion, the second base portion, and the sealing portion on the side opposite to the illuminated region side. It is preferable that it is provided so as to further cover.

  According to this configuration, the end surface of the first base portion of the reflector, the end surface of the second base portion of the secondary mirror, and the end surface of the sealing portion of the arc tube are bonded to the holding member on the side opposite to the illuminated region side. Fixed to each other by the agent. For this reason, even when a vibration or impact is applied in a direction along the illumination optical axis, the reflector, the secondary mirror, and the arc tube can be fixed and held together. As a result, the secondary mirror and arc tube can be prevented from falling off more reliably, and the resistance to vibration and impact can be further improved. In addition, since the holding member and the adhesive are arranged on the side opposite to the illuminated region side of the arc tube, it is possible to suppress the light leaking from the light emitting unit to the side opposite to the illuminated region side. it can.

  Application Example 5 In the light source device according to the application example described above, it is preferable that the holding member has a mesh shape.

  According to this configuration, since the holding member has a mesh shape, the weight can be reduced even when the same region is covered as compared with the case where a plate-like member or the like is used. Moreover, since an adhesive agent wraps around to the opening part of a mesh, peeling of an adhesive agent is suppressed.

  Application Example 6 In the light source device according to the application example described above, it is preferable that the holding member is made of a material having higher thermal conductivity than the sub mirror and the reflector.

  According to this configuration, since the holding member is made of a material having a higher thermal conductivity than the secondary mirror and the reflector, the heat emitted from the arc tube and propagated to the secondary mirror and the reflector can be released by the holding member. Thereby, deterioration of the reflective surface of a submirror and a reflector by heat can be suppressed.

  Application Example 7 A projector according to this application example includes an illumination device including the light source device described above, an electro-optic modulation device that modulates illumination light from the illumination device according to image information, and the electro-optic modulation. And a projection lens that projects the modulated light from the apparatus.

  According to this configuration, it is possible to reduce the thickness without reducing the luminance, and since the light source device of the present invention having high impact resistance is provided, the projector is high-intensity and thin, and further has high impact resistance. Can provide.

1 is a diagram illustrating a schematic configuration of a projector according to a first embodiment. The figure which shows schematic structure of the light source device which concerns on 1st Embodiment. The figure which shows schematic structure of the light source device which concerns on 1st Embodiment. The figure which shows schematic structure of the light source device which concerns on 2nd Embodiment. The figure which shows schematic structure of the light source device which concerns on the modification 1. As shown in FIG. The figure which shows schematic structure of the light source device which concerns on the modification 2. As shown in FIG.

  The present embodiment will be described below with reference to the drawings. In each of the drawings to be referred to, the dimensional ratios, angles, and the like of the respective constituent elements are appropriately changed for easy understanding of the configuration.

(First embodiment)
<Projector>
First, the projector according to the first embodiment will be described with reference to FIG. FIG. 1 is a diagram illustrating a schematic configuration of a projector according to the first embodiment.

  As shown in FIG. 1, the projector 1000 according to the first embodiment includes an illumination device 100, a color separation light guide optical system 200, three condenser lenses 300R, 300G, and 300B, and an electro-optic modulation device. The projector includes three liquid crystal devices 400R, 400G, and 400B, a cross dichroic prism 500, a projection optical system 600, and a cooling mechanism (not shown).

  The illumination device 100 includes a light source device 10, a concave lens 90, a first lens array 120 having a plurality of first small lenses 122, a second lens array 130 having a plurality of second small lenses 132, and a polarization conversion element 140. And a superimposing lens 150.

  The light source device 10 includes an arc tube 20, a reflector 30, a secondary mirror 40, and a holding member 50. The reflector 30 has a reflecting surface 32a (see FIG. 2) that is a part of a spheroid having a first focal point and a second focal point on the illumination optical axis OC. The first focal point of the reflector 30 is located in the light emitting unit 22 (see FIG. 2) of the arc tube 20. The light source device 10 emits an illumination light beam that converges toward the second focal point of the reflector 30.

  The light source device 10 is configured to be replaceable by the user when the arc tube 20 reaches the end of its life. In the light source device 10, the side from which the luminous flux is emitted, that is, the opening side of the reflector 30 is also referred to as the illuminated region side. In the light source device 10, the side opposite to the illuminated region side (opening side) is also referred to as the back side. The detailed configuration of the light source device 10 will be described later.

  The concave lens 90 is disposed on the illuminated area side of the light source device 10. The concave lens 90 emits the converged light from the light source device 10 toward the first lens array 120 as substantially parallel light. The first lens array 120 has a function as a light beam splitting optical element that splits the illumination light beam emitted from the concave lens 90 into a plurality of partial light beams. The first lens array 120 includes a plurality of first small lenses 122 arranged in a matrix in a plane substantially orthogonal to the illumination optical axis OC. Although not illustrated, the outer shape of the first small lens 122 is similar to the outer shape of the image forming area of the liquid crystal devices 400R, 400G, and 400B.

  The second lens array 130 is an optical element for condensing a plurality of partial light beams divided by the first lens array 120 described above. The second lens array 130 includes a plurality of second small lenses 132 arranged in a matrix in a plane substantially orthogonal to the illumination optical axis OC corresponding to the plurality of first small lenses 122 of the first lens array 120. I have.

  The polarization conversion element 140 is a polarization conversion element that converts each partial light beam from the second lens array 130 into approximately one type of linearly polarized light having a uniform polarization direction and emits the converted light. The polarization conversion element 140 transmits one linear polarization component of the polarization component included in the illumination light beam from the light source device 10 as it is, and reflects the other linear polarization component in a direction perpendicular to the illumination optical axis OC. A reflection layer that reflects the other linearly polarized light component reflected by the polarization separation layer in a direction parallel to the illumination optical axis OC, and converts the other linearly polarized light component reflected by the reflective layer into one linearly polarized light component. And a retardation plate.

  The superimposing lens 150 condenses a plurality of partial light beams emitted through the first lens array 120, the second lens array 130, and the polarization conversion element 140 and superimposes them in the vicinity of the image forming area of the liquid crystal devices 400R, 400G, and 400B. It is an optical element for making it. Note that the superimposing lens 150 is illustrated as a single lens in FIG. 1, but may be configured by a composite lens in which a plurality of lenses are combined.

  The color separation light guide optical system 200 includes dichroic mirrors 210 and 220, reflection mirrors 230, 240 and 250, an incident side lens 260, and a relay lens 270. The color separation light guide optical system 200 separates the illumination light beam emitted from the illumination device 100 into three color lights of red light, green light, and blue light, and the respective color lights are liquid crystal devices 400R and 400G to be illuminated. , 400B.

  The dichroic mirrors 210 and 220 are optical elements on which a wavelength selection film that reflects a light beam in a predetermined wavelength region and transmits a light beam in another wavelength region is formed on a substrate. The dichroic mirror 210 disposed in the front stage of the optical path is a mirror that reflects a red light component and transmits other color light components. The dichroic mirror 220 disposed in the latter stage of the optical path is a mirror that reflects the green light component and transmits the blue light component.

  The red light component reflected by the dichroic mirror 210 is bent by the reflection mirror 230 and enters the image forming area of the liquid crystal device 400R for red light through the condenser lens 300R. The condenser lens 300R is provided to convert each partial light beam from the superimposing lens 150 into a light beam substantially parallel to each principal ray. The condensing lenses 300G and 300B disposed in the preceding stage of the optical path of the other liquid crystal devices 400G and 400B are configured in the same manner as the condensing lens 300R.

  Of the green light component and the blue light component that have passed through the dichroic mirror 210, the green light component is reflected by the dichroic mirror 220, passes through the condenser lens 300G, and enters the image forming area of the green light liquid crystal device 400G. On the other hand, the blue light component passes through the dichroic mirror 220 and passes through the incident side lens 260, the incident side reflection mirror 240, the relay lens 270, the emission side reflection mirror 250, and the condensing lens 300B. The light enters the image forming area of the liquid crystal device 400B. The incident side lens 260, the relay lens 270, and the reflection mirrors 240 and 250 have a function of guiding the blue light component transmitted through the dichroic mirror 220 to the liquid crystal device 400B.

  The incident side lens 260, the relay lens 270, and the reflection mirrors 240 and 250 are provided in the optical path of the blue light because the length of the optical path of the blue light is longer than the lengths of the optical paths of the other color lights. The reason for this is to prevent a decrease in light utilization efficiency due to light divergence and the like. The projector 1000 according to the first embodiment has such a configuration because the length of the optical path of blue light is long. However, the length of the optical path of red light is increased, and the incident side lens 260 and the relay are configured. The lens 270 and the reflection mirrors 240 and 250 may be used in the optical path of red light.

  The liquid crystal devices 400R, 400G, and 400B modulate each of the three color lights separated by the color separation light guide optical system 200 in accordance with image information, and are illumination targets of the illumination device 100. Although not shown, an incident-side polarizing plate is disposed between the condenser lenses 300R, 300G, and 300B and the liquid crystal devices 400R, 400G, and 400B, respectively, and the liquid crystal devices 400R, 400G, and 400B are cross dichroic. An exit-side polarizing plate is disposed between each prism 500.

  The incident-side polarizing plate, the liquid crystal devices 400R, 400G, and 400B, and the exit-side polarizing plate modulate the light of each incident color light. The liquid crystal devices 400R, 400G, and 400B are obtained by hermetically sealing a liquid crystal that is an electro-optical material on a pair of transparent glass substrates. The liquid crystal devices 400R, 400G, and 400B, for example, use polysilicon TFTs as switching elements to modulate the polarization direction of one type of linearly polarized light emitted from the incident-side polarizing plate according to a given image signal.

  The cross dichroic prism 500 is an optical element that forms a color image by synthesizing optical images modulated by the three liquid crystal devices 400R, 400G, and 400B and modulated for each color light emitted from the emission 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 of the substantially X-shaped interfaces reflects red light, and the dielectric multilayer film formed at the other interface reflects blue light. By these dielectric multilayer films, the red light and the blue light are bent and aligned with the traveling direction of the green light, so that the three color lights are synthesized.

  The projection optical system 600 enlarges and projects the color image synthesized by the cross dichroic prism 500 onto a projection surface such as a screen SCR. Thereby, an image is formed on a projection surface such as a screen SCR.

<Light source device>
Next, the light source device according to the first embodiment will be described with reference to FIGS. 2 and 3 are diagrams illustrating a schematic configuration of the light source device according to the first embodiment. Specifically, FIG. 2A is a perspective view illustrating a configuration of a main part of the light source device 10, and FIG. 2B is a cross-sectional view taken along the line AA ′ in FIG. 3A is a side view of the light source device 10, and FIG. 3B is a rear view of the light source device 10. FIG. In addition, illustration of the holding member 50 is abbreviate | omitted in Fig.2 (a) and (b).

  Hereinafter, a case where the projector 1000 is arranged in a so-called stationary state will be described as an example. The arrangement of the components of the light source device 10 in FIGS. 2A and 2B and FIGS. 3A and 3B corresponds to the stationary state of the projector 1000. In the stationary state of the projector 1000, the direction of gravity is the direction from the reflector 30 side toward the secondary mirror 40 side.

  As shown in FIGS. 2A and 2B, the light source device 10 according to the first embodiment includes an arc tube 20, a reflector 30, a secondary mirror 40, a holding member 50 (FIG. 3A and FIG. (See (b)).

  The arc tube 20 includes a light emitting unit 22 having a pair of electrodes arranged along the illumination optical axis OC, and a pair of sealing units 24 connected to both sides of the light emitting unit 22 and extending along the illumination optical axis OC. , 26, a pair of metal foils sealed in the pair of sealing portions 24, 26, and a pair of lead wires respectively electrically connected to the pair of metal foils. When a voltage is applied to the lead wire, a potential difference is generated between the pair of electrodes, discharge occurs, and an arc image is generated.

  Of the pair of sealing portions 24, 26, the sealing portion 26 is disposed on the illuminated region side of the light emitting portion 22, and the sealing portion 24 is opposite to the illuminated region side of the light emitting portion 22, that is, the back surface. Arranged on the side. From the sealing portion 24, the lead wire 28 of the pair of lead wires extends to the back side. The arc tube 20 is fixed to the reflector 30 at the sealing portion 24.

  The light emitting portion 22 and the sealing portions 24 and 26 are made of, for example, quartz glass and are integrally formed. Mercury, rare gas, and a small amount of halogen are enclosed in the light emitting unit 22. The electrode is, for example, a tungsten electrode, and the metal foil is, for example, a molybdenum foil. The lead wire is made of, for example, molybdenum or tungsten. In addition, as the arc tube 20, various arc tubes that emit light with high luminance can be employed, for example, a high pressure mercury lamp, an ultra high pressure mercury lamp, a metal halide lamp, or the like.

  As shown in FIG. 2A, the reflector 30 has a substantially quarter shape of an elliptic sphere obtained by rotating the ellipsoid about the illumination optical axis OC as the rotation center axis. That is, approximately half of the elliptic sphere in the direction along the illumination optical axis OC is deleted, and when cut along a predetermined plane S including the illumination optical axis OC, one side, that is, the arc tube 20 Thus, the end 30z on the side of the secondary mirror 40 is removed. Therefore, the end of the reflector 30 on the opening side (illuminated region side) has a substantially semicircular shape. Hereinafter, the side from which the end 30z of the reflector 30 is deleted is also referred to as one side.

As shown in FIGS. 2A and 2B, the reflector 30 includes a reflecting portion 32 having a reflecting surface 32 a on the inner surface facing the arc tube 20, and a first base connected to the reflecting portion 32. And a base 34. The reflection part 32 and the base part 34 are integrally formed. As a material for the base material of the reflector 30, for example, crystallized glass, alumina (Al ₂ O ₃ ), or the like can be suitably used.

The reflecting part 32 is arranged so that the light emitting part 22 is positioned in the vicinity of the first focal point with respect to the arc tube 20. The reflection unit 32 reflects the light emitted from the light emitting unit 22 toward the second focal position on the illuminated area side on the reflection surface 32a. For example, a visible light reflection layer made of a dielectric multilayer film of titanium oxide (TiO ₂ ) and silicon oxide (SiO ₂ ) is formed on the reflection surface 32a. The side opposite to the reflecting surface 32a of the reflector 30 is also referred to as the outer surface side.

  The base portion 34 extends along the illumination optical axis OC on the back side of the reflecting portion 32, and is disposed corresponding to the sealing portion 24 of the arc tube 20. The base portion 34 has, for example, a shape in which substantially half of one side of the substantially cylindrical shape extending along the illumination optical axis OC is deleted. An adhesive C is filled between the base portion 34 and the sealing portion 24, and the base portion 34 and the sealing portion 24 are fixed to each other. Thereby, the arc tube 20 is fixed to the reflector 30. The adhesive C is, for example, cement. As the adhesive C, a ceramic heat resistant adhesive or the like may be used.

  The secondary mirror 40 is located on the opposite side of the arc tube 20 from the reflector 30, that is, on one side where the end 30z of the reflector 30 is removed. The sub mirror 40 includes a reflecting portion 42 having a reflecting surface 42 a on the inner surface facing the arc tube 20, and a base portion 44 as a second base connected to the reflecting portion 42. The reflection part 42 and the base part 44 are integrally formed. The secondary mirror 40 is made of, for example, hard glass or quartz glass. The material of the secondary mirror 40 may be a metal.

The reflecting part 42 has, for example, a substantially hemispherical shape in which approximately 1/2 of the sphere on the reflector 30 side is deleted. The reflecting part 42 is arranged so as to cover one side of the light emitting part 22 of the arc tube 20. The reflection part 42 reflects the light emitted from the light emitting part 22 toward the light emitting part 22 on the reflection surface 42a. That is, the secondary mirror 40 is disposed so that the reflective surface 42 a faces the reflective surface 32 a of the reflector 30. For example, a reflective layer made of a dielectric multilayer film of tantalum oxide (Ta ₂ O ₅ ) and silicon oxide (SiO ₂ ) is formed on the reflective surface 42a. The side opposite to the reflecting surface 42a of the secondary mirror 40 is also called the outer surface side.

  The base portion 44 extends along the illumination optical axis OC on the back side of the reflecting portion 42 and is disposed corresponding to the sealing portion 24 of the arc tube 20. The base 44 has, for example, a shape in which approximately half of the cylindrical shape extending along the illumination optical axis OC is removed from the reflector 30 side. An adhesive C is filled between the base portion 44 and the sealing portion 24, and the base portion 44 and the sealing portion 24 are fixed to each other. Thereby, the secondary mirror 40 is fixed to the arc tube 20.

  According to the configuration of the light source device 10 according to the first embodiment, since the end 30z on one side of the reflector 30 is deleted, the light source device 10 can be thinned. On the other hand, the secondary mirror 40 is disposed so as to cover one side of the light emitting unit 22, and the light emitted from the arc tube 20 to the secondary mirror 40 side can be reflected and effectively used. A decrease in luminance due to the deletion of one side can be suppressed.

  As shown in FIGS. 3A and 3B, the holding member 50 is disposed on the back side of the light source device 10 so as to correspond to the sealing portion 24 of the arc tube 20. The holding member 50 has a shape in which, for example, a part of the cylindrical shape extending along the illumination optical axis OC is removed from the side opposite to the secondary mirror 40, and the reflector 30 and the secondary mirror 40 are formed. It is provided to straddle. More specifically, the holding member 50 is provided from the outer surface side of the base portion 44 to the outer surface side of the portion excluding a part of the base portion 34 opposite to the sub mirror 40.

  The holding member 50 is formed in a mesh shape, for example. By making the holding member 50 into a mesh shape, the weight can be reduced even if it is configured to cover the same region as compared to the case where it is formed of a plate-like member or the like. The holding member 50 is made of a material having higher thermal conductivity than the reflector 30 and the secondary mirror 40. As a material of the holding member 50, for example, a metal such as an aluminum alloy or a magnesium alloy can be suitably used.

  By configuring the holding member 50 with a material having a high thermal conductivity, heat propagated from the arc tube 20 to the reflector 30 and the secondary mirror 40 can be released from the holding member 50. For this reason, deterioration by the heat | fever of the reflective layer formed in the reflective surfaces 32a and 42a and the fall of the reflectance resulting from it can be suppressed. Moreover, by releasing the heat propagated to the reflector 30 and the secondary mirror 40, it is possible to suppress overheating of the arc tube 20, and to suppress deterioration of the metal foil sealed in the sealing portions 24 and 26 due to heat. .

  An adhesive C is disposed between the holding member 50 and the portion covered with the holding member 50 on the outer surface side of the base 34 and the base 44. Since the holding member 50 has a mesh shape, the adhesive C is disposed so as to go around the opening of the mesh. The base 34 and the base 44 and the holding member 50 are fixed to each other with an adhesive C. Thereby, the reflector 30 and the sub mirror 40 and the holding member 50 are fixed to each other via the adhesive C.

  Here, since the arc tube 20 is fixed to the reflector 30 and the secondary mirror 40, the arc tube 20, the reflector 30 and the secondary mirror 40 are integrally fixed and held by the holding member 50 and the adhesive C. You can also. Further, since the adhesive C is covered with the holding member 50 and wraps around the mesh opening of the holding member 50, the adhesive C is prevented from being peeled off from the base 34, the base 44, and the like.

  By the way, in the stationary state of the projector 1000, the arc tube 20 is located below the reflector 30 in the gravitational direction, and the secondary mirror 40 is located below the arc tube 20 in the gravitational direction. Accordingly, since gravity acts in the direction in which the secondary mirror 40 is dropped from the arc tube 20, when the light source device 10 is not provided with the holding member 50, the secondary mirror 40 is caused by impact, vibration, or the like. The arc tube 20 may fall off the reflector 30 together with the secondary mirror 40.

  On the other hand, according to the configuration of the light source device 10 according to the first embodiment, the arc tube 20, the reflector 30, and the sub mirror 40 are integrally held by the holding member 50 and the adhesive C. This makes it difficult for the secondary mirror 40 to fall off the arc tube 20, making it difficult for the arc tube 20 to fall off the reflector 30, and improving resistance to vibration and impact.

  When the projector 1000 is arranged in a so-called ceiling state, the positional relationship of each component in the direction of gravity is reversed. However, since the arc tube 20, the reflector 30, and the secondary mirror 40 are integrally held by the holding member 50 and the adhesive C, even when the projector 1000 is placed in a suspended state, it is the same as in the stationary state. An effect is obtained.

  As shown in FIG. 3B, the adhesive C includes the arc tube 20 (sealing portion 24), the reflector 30 (base portion 34), and the secondary mirror 40 (base portion 44) surrounded by the holding member 50. It is preferable that it is filled between the holding member 50. By doing in this way, the arc_tube | light_emitting_tube 20, the reflector 30, and the submirror 40 can be hold | maintained more firmly.

  According to the configuration of the light source device 10 according to the first embodiment, the following effects are obtained.

  (1) The reduction in luminance is suppressed to reduce the thickness, and the arc tube 20, the reflector 30 and the secondary mirror 40 are integrally held by the holding member 50 and the adhesive C, so that the secondary mirror 40 and the arc tube 20 are It is possible to provide a light source device that does not easily fall off and has high resistance to vibration and impact.

  (2) By making the holding member 50 into a mesh shape, the weight can be reduced. Moreover, since the adhesive C wraps around the opening of the mesh, peeling off of the adhesive C can be suppressed.

  (3) Since the holding member 50 has a high thermal conductivity, heat propagated from the arc tube 20 to the reflector 30 and the secondary mirror 40 can be released. Thereby, deterioration by the heat | fever of a reflective layer or metal foil can be suppressed.

(Second Embodiment)
<Light source device>
Next, a light source device according to a second embodiment will be described with reference to FIG. The light source device according to the second embodiment is different from the light source device according to the first embodiment in the shape of the holding member, but the other configurations are the same.

  FIG. 4 is a diagram illustrating a schematic configuration of the light source device according to the second embodiment. Specifically, FIG. 4A is a side view of the light source device 12 according to the second embodiment, and FIG. 4B is a rear view of the light source device 12. In addition, about the component which is common in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 4A and 4B, the light source device 12 according to the second embodiment includes an arc tube 20, a reflector 30, a sub mirror 40, and a holding member 52. The holding member 52 has a cylindrical portion 52a extending along the illumination optical axis OC and a back surface portion 52b connected to the back surface side of the cylindrical portion 52a. The back surface portion 52b is provided with an opening 52c (see FIG. 4B) through which the lead wire 28 extending from the sealing portion 24 is passed.

  The cylindrical portion 52 a of the holding member 52 covers the outer surface side of the base portion 34 and the outer surface side of the base portion 44. The back surface portion 52 b covers the end surfaces of the sealing portion 24, the base portion 34, and the base portion 44 on the back surface side. An adhesive C is disposed between the holding member 52 and the sealing portion 24, the base portion 44, and the base portion 34. Similar to the holding member 50 in the first embodiment, the holding member 52 is formed in a mesh shape using a material having higher thermal conductivity than the reflector 30 and the sub mirror 40.

  According to the configuration of the holding member 52 according to the second embodiment, since the range covered by the holding member 52 can be made wider than in the first embodiment, the region where the adhesive C is disposed is made larger. be able to. And since the end surfaces on the back side of the sealing portion 24, the base portion 34, and the base portion 44 are fixed to each other by the holding member 52 and the adhesive C, the direction along the illumination optical axis OC, that is, the direction different from the gravitational direction. Even when vibration or impact is applied, the arc tube 20, the reflector 30, and the sub mirror 40 can be fixed and held together. Thereby, the arc tube 20, the reflector 30, and the secondary mirror 40 can be more firmly fixed and held.

  Further, since the surface area of the holding member 52 is increased as compared with the first embodiment, the heat dissipation effect by the holding member 52 is improved. Thereby, deterioration by the heat | fever of a reflective layer or metal foil can be suppressed more effectively. Furthermore, since the holding member 52 (back surface portion 52b) and the adhesive C are disposed on the back side of the arc tube 20, by using an adhesive having a light shielding property as the adhesive C, the light is emitted from the light emitting portion 22 and back side. The light that leaks into can be blocked.

  The holding member 52 and the lead wire 28 are insulated by an adhesive C or an insulating member. The holding member 52 may be electrically connected to a predetermined potential such as the ground of the light source device 12, for example. Further, if necessary, the holding member 52 and the lead wire 28 can be electrically connected.

  According to the configuration of the light source device 12 according to the second embodiment, the same effects as those of the light source device 10 according to the first embodiment can be obtained, and the following is further achieved as compared with the light source device 10 according to the first embodiment. The following effects can be obtained.

  (1) Since the arc tube 20, the reflector 30, and the secondary mirror 40 are more firmly held by covering the wider range with the holding member 52 and covering the end surface on the back side, the secondary mirror 40 and the arc tube 20 Drop-off can be suppressed more reliably, and resistance to vibration and impact can be further improved.

  (2) Since the heat dissipation effect by the holding member 52 is improved by increasing the surface area of the holding member 52, deterioration of the reflective layer and the metal foil due to heat can be more effectively suppressed.

  (3) Since the holding member 52 and the adhesive C are disposed on the back side of the arc tube 20, light leakage to the back side can be suppressed.

  As described above, the light source device and the projector according to the present invention have been described based on the above embodiment, but the present invention is not limited thereto, and various modifications can be made without departing from the spirit of the present invention. . As modifications, for example, the following can be considered.

(Modification 1)
In the configuration of the light source device of the above embodiment, the holding member is formed in a mesh shape, but the present invention is not limited to this form. The holding member may have a different configuration. FIG. 5 is a diagram illustrating a schematic configuration of a light source device according to the first modification. Specifically, FIG. 5A is a side view of the light source device, and FIG. 5B is a rear view of the light source device. In addition, about the component which is common in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As illustrated in FIGS. 5A and 5B, the light source device 14 according to the first modification includes the arc tube 20, the reflector 30, the sub mirror 40, and the holding member 54. The holding member 54 is formed by bending a plate-shaped member made of metal so that a cross section in a direction along the illumination optical axis OC is substantially C-shaped. The holding member 54 is provided from the outer surface side of the base portion 44 to the outer surface side of the portion excluding a part of the base portion 34 opposite to the sub mirror 40. An adhesive C is disposed between the base 34 and the base 44 and the holding member 54.

  Also in the configuration of the light source device 14 according to the first modification, the arc tube 20, the reflector 30, and the sub mirror 40 are integrally held by the holding member 54 and the adhesive C. This makes it difficult for the secondary mirror 40 and the arc tube 20 to drop off, and improves resistance to vibration and impact. In addition, by configuring the holding member 54 with a material having high thermal conductivity, heat propagated from the arc tube 20 to the reflector 30 and the sub mirror 40 can be released.

  The holding member 54 may have a configuration in which a cross section in a direction along the illumination optical axis OC is formed in an annular shape.

(Modification 2)
Subsequently, Modification 2 will be described. FIG. 6 is a diagram illustrating a schematic configuration of a light source device according to the second modification. Specifically, FIG. 6A is a side view of the light source device, and FIG. 6B is a rear view of the light source device. In addition, about the component which is common in the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  As shown in FIGS. 6A and 6B, the light source device 16 according to Modification 2 includes a light emitting tube 20, a reflector 30, a sub mirror 40, and a holding member 56. The holding member 56 is formed in a coil shape using a linear member made of metal. The linear member of the holding member 56 is provided so as to be wound around the base 44 of the sub mirror 40 and the base 34 of the reflector 30 a plurality of times. An adhesive C is disposed between the base 34 and the base 44 and the holding member 56. The adhesive C is arranged so as to go around between the linear members of the holding member 56.

  Also in the configuration of the light source device 16 according to the modified example 2, the arc tube 20, the reflector 30, and the sub mirror 40 are integrally held by the holding member 56 and the adhesive C. This makes it difficult for the secondary mirror 40 and the arc tube 20 to drop off, and improves resistance to vibration and impact. Further, by configuring the holding member 56 with a material having a high thermal conductivity, heat propagated from the arc tube 20 to the reflector 30 and the secondary mirror 40 can be released.

  The holding member 56 may have a configuration in which both ends of a linear member wound around the base portion 44 and the base portion 34 are connected to each other.

(Modification 3)
In the configuration of the projector of the above embodiment, the lens integrator optical system including the first lens array and the second lens array is used as the light uniformizing optical system, but the present invention is not limited to this. As the light homogenizing optical system, for example, a rod integrator optical system including a light guide rod can be used.

(Modification 4)
The projector in the above embodiment is a transmissive projector, but the present invention is not limited to this. For example, a reflective projector may be used. 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.

(Modification 5)
The projector in the above embodiment is a projector using three liquid crystal devices, but the present invention is not limited to this. The present invention can also be applied to a projector using one, two, four or more liquid crystal devices, for example.

(Modification 6)
In the configuration of the projector of the above embodiment, a liquid crystal device is used as the electro-optic modulation device, but 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.

(Modification 7)
The present invention can be applied to a front projection type projector that projects from the side that observes the projected image and a rear projection type projector that projects from the side opposite to the side that observes the projected image.

(Modification 8)
In the said embodiment, although the example which applied the light source device of this invention to the projector was demonstrated, this invention is not limited to this. The light source device of the present invention can also be applied to other optical equipment such as an optical disk device.

  DESCRIPTION OF SYMBOLS 10, 12, 14, 16 ... Light source device, 20 ... Light emission tube, 22 ... Light emission part, 24 ... Sealing part, 30 ... Reflector, 34 ... Base as 1st base, 40 ... Submirror, 44 ... 2nd 50, 52, 54, 56 ... holding member, 100 ... illuminating device, 120 ... first lens array, 122 ... first small lens, 130 ... second lens array, 132 ... second small lens, DESCRIPTION OF SYMBOLS 140 ... Polarization conversion element, 150 ... Superposition lens, 200 ... Color separation light guide optical system, 210, 220 ... Dichroic mirror, 230, 240, 250 ... Reflection mirror, 260 ... Incident side lens, 270 ... Relay lens, 300R, 300G , 300B ... Condensing lens, 400R, 400G, 400B ... Liquid crystal device as an electro-optic modulator, 500 ... Cross dichroic prism, 600 ... Projection optical system, 000 ... projector.

Claims (7)

An arc tube having a light emitting part;
A reflector that has a shape in which one side is deleted when cut along a predetermined plane, and reflects light emitted from the light-emitting portion toward the illuminated region; and
A sub-mirror disposed on the one side of the arc tube and reflecting light emitted from the light-emitting unit to the one side toward the light-emitting unit;
A holding member disposed on the opposite side of the illuminated region side and provided across the outer surface side of the reflector and the outer surface side of the secondary mirror;
A light source device, wherein an adhesive is disposed between the reflector, the sub mirror, and the holding member. The light source device according to claim 1,
The arc tube has a sealing portion extending along the illumination optical axis on the opposite side of the light emitting portion from the illuminated region side,
The reflector has a first base for fixing the sealing portion,
The secondary mirror has a second base for fixing the secondary mirror to the sealing portion,
The light source device, wherein the holding member is provided from the outer surface side of the second base portion to at least a part of the outer surface side of the first base portion. The light source device according to claim 2,
The holding member is provided so as to cover an outer surface side of the first base portion and an outer surface side of the second base portion. The light source device according to claim 3,
The holding member is provided so as to further cover an end surface of the first base portion, the second base portion, and the sealing portion on the side opposite to the illuminated region side. . The light source device according to any one of claims 1 to 4,
The light source device, wherein the holding member has a mesh shape. The light source device according to any one of claims 1 to 5,
The light source device, wherein the holding member is made of a material having higher thermal conductivity than the sub mirror and the reflector. An illumination device comprising the light source device according to any one of claims 1 to 6,
An electro-optic modulation device that modulates illumination light from the illumination device according to image information;
A projection lens that projects the modulated light from the electro-optic modulator;
A projector comprising:

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