JP2018185964A - Light source device and projector - Google Patents

Abstract

Provided is a light source device capable of reliably relighting. A light source device includes a light emitting section having a pair of electrodes facing each other and a first sealing section extending from the light emitting section, and a discharge lamp having a first sealing section. An intermediate support portion 6 disposed on the outer periphery of one sealing portion 412a, and a reflector 5 that is fixed to the first sealing portion 412a via the intermediate support portion 6 and reflects light emitted from the light emitting portion 411. The intermediate support portion 6 includes a first member having a plurality of protrusions intermittently provided along the outer periphery of the first sealing portion 412a in a direction perpendicular to the direction in which the first sealing portion 412a extends. 60. [Selection] Figure 2

Description

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

  Conventionally, a projector that modulates light emitted from a light source device according to image information and projects the modulated light onto a projection surface such as a screen is known. A device using a discharge lamp as the light source device has been proposed (see, for example, Patent Document 1).

  The lamp unit (light source device) described in Patent Literature 1 includes a high-pressure mercury lamp including a light-emitting tube and a reflecting mirror. The arc tube includes a light emitting portion in which a pair of electrodes are disposed opposite to each other on substantially the same axis, and a sealing portion that is provided at both ends of the light emitting portion and seals a part of each of the pair of electrodes. have. The arc tube is made of, for example, quartz glass, and mercury, which is a luminescent material, and, for example, argon gas or the like as a start-up rare gas are sealed in the internal discharge space. The reflecting mirror includes a reflecting surface and a neck portion having a through hole. In the arc tube, one sealing portion is inserted through the through hole, and is supported by the neck portion via a base and an adhesive.

JP 2011-124184 A

In the light source device described in Patent Document 1, it is considered that the heat capacity of the reflecting mirror is larger than the heat capacity of the arc tube. The heat is transferred to the arc tube (one sealing portion) through the neck portion.
If the mercury is condensed near one sealing part in the discharge space when the light is extinguished, the condensed mercury evaporates due to the heat transferred from the reflecting mirror to the one sealing part. There is a risk of short circuiting (referred to as a mercury bridge) between the pair of electrodes. That is, in the light source device described in Patent Document 1, a mercury bridge is generated when the light is turned off, and there is a possibility that the light source device cannot be relighted.

  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 includes a light emitting unit having a pair of electrodes opposed to each other inside, a discharge lamp having a first sealing unit extending from the light emitting unit, An intermediate support portion disposed on an outer periphery of one sealing portion, and a reflector that is fixed to the first sealing portion via the intermediate support portion and reflects light emitted from the light emitting portion, and The intermediate support portion includes a first member having a plurality of convex portions provided intermittently along an outer periphery of the first sealing portion in a direction perpendicular to a direction in which the first sealing portion extends. It is characterized by being.

  According to this configuration, since the light source device has the intermediate support portion disposed between the discharge lamp and the reflector, the heat conduction between the discharge lamp and the reflector is performed via the intermediate support portion. Is called. And since the intermediate | middle support part is equipped with the 1st member which has the some convex part provided intermittently, the heat conduction between a discharge lamp and a reflector is made through this some convex part. In other words, the heat transferable region can be narrowed. Therefore, since the heat transfer between the reflector and the discharge lamp can be made gentle, the temperature rise of the discharge lamp at the time of extinguishing is suppressed, and the mercury in the light emitting portion that has been condensed is prevented from evaporating again. It becomes possible. Therefore, it is possible to provide a light source device that prevents the occurrence of a mercury bridge when the light is turned off and reliably turns it back on.

  Application Example 2 In the light source device according to the application example, it is preferable that the intermediate support portion is provided with a gap between the adjacent convex portions among the plurality of convex portions.

  According to this configuration, it is possible to make it difficult for heat to be transmitted from the reflector to the discharge lamp, and it is possible to circulate the air blown from the outside into the gap. Therefore, it is possible to provide a light source device that can prevent the occurrence of a mercury bridge when the light is turned off and can efficiently cool the light emitting unit even when the light is turned on.

  Application Example 3 In the light source device according to the application example described above, the intermediate support portion includes a second member disposed between the adjacent convex portions among the plurality of convex portions, and heat of the second member. The conductivity is preferably smaller than the thermal conductivity of the first sealing portion.

  According to this configuration, heat can be hardly transmitted from the reflector to the discharge lamp, and the discharge lamp can be more firmly supported via the intermediate support portion of the reflector.

  Application Example 4 In the light source device according to the application example, the reflector has an insertion hole through which the first sealing portion is inserted, and the intermediate sealing portion extends from the first sealing portion. In the direction, it is preferably provided in a part of the insertion hole.

  According to this configuration, it is possible to narrow a region in which heat can be transferred between the discharge lamp and the reflector in the direction in which the first sealing portion extends. Therefore, the heat transfer from the reflector to the discharge lamp can be further moderated, and the occurrence of mercury bridge at the time of extinction can be surely prevented.

  Application Example 5 A projector according to this application example is modulated by the light source device according to any one of the above, a light modulation device that modulates light emitted from the light source device, and the light modulation device. A projection optical device for projecting light.

According to this configuration, since the projector includes the light source device that reliably turns on again, the power is turned off after the use is finished, and when the power is turned on again, an image can be reliably projected.
Further, since the mercury bridge is prevented from being generated even when the light source device is not cooled when the light is turned off, a projector that forcibly stops the operation without performing the cool-down operation when the power is turned off can be realized. Therefore, it is possible to provide a projector that is easy to use.

1 is a schematic diagram showing a schematic configuration of a projector according to a first embodiment. Sectional drawing which shows typically the light source device of 1st Embodiment. Sectional drawing which shows typically the light source device of 1st Embodiment. Sectional drawing which shows the light source device of 2nd Embodiment typically. Sectional drawing which shows the light source device of 2nd Embodiment typically. The schematic diagram for demonstrating the intermediate | middle support part which is an example of a modification. The schematic diagram for demonstrating the intermediate | middle support part which is another modification. The schematic diagram for demonstrating the intermediate | middle support part which is another modification.

(First embodiment)
Hereinafter, a light source device and a projector according to the present embodiment will be described with reference to the drawings.
The projector according to the present embodiment modulates light emitted from a light source according to image information, and enlarges and projects the modulated light onto a projection surface such as a screen.

[Main components of the projector]
FIG. 1 is a schematic diagram illustrating a schematic configuration of a projector 1 according to the present embodiment.
As shown in FIG. 1, the projector 1 includes an exterior casing 2 constituting an exterior, a control unit (not shown), and an optical unit 3 having a light source device 30. Although not shown, a cooling device including a cooling fan and the like, a power supply device that supplies power to the control unit, the light source device 30, and the like are further arranged inside the exterior housing 2.

  Although detailed description is omitted, the exterior casing 2 is composed of a plurality of members, and is provided with an intake port for taking in outside air, an exhaust port for exhausting warm air inside the exterior housing 2 to the outside, and the like. .

  The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and functions as a computer, and is related to control of the operation of the projector 1, for example, image projection. Control and control of the rotational speed of the cooling fan provided in the cooling device are performed.

[Configuration of optical unit]
The optical unit 3 optically processes and projects the light emitted from the light source device 30 under the control of the control unit.
As shown in FIG. 1, in addition to the light source device 30, the optical unit 3 includes a light source device casing 31, an integrator illumination optical system 32, a color separation optical system 33, a relay optical system 34, an electro-optical device 35, and a projection optical device. A projection lens 36, and an optical component casing 37 in which these members are arranged at predetermined positions on the optical path.

The light source device 30 includes a discharge lamp 4 as a light source, a reflector 5, and an intermediate support portion 6. The discharge lamp 4 is an ultra-high pressure mercury lamp, and a reflector 5 is fixed via an intermediate support portion 6. The light source device 30 reflects the light emitted from the discharge lamp 4 by the reflector 5 and emits the light toward the integrator illumination optical system 32. The light source device 30 will be described in detail later.
The light source device housing 31 houses the light source device 30 and is configured to be detachable from the optical component housing 37.

The integrator illumination optical system 32 includes lens arrays 321 and 322, a polarization conversion element 323, and a superimposing lens 324.
The lens array 321 has a configuration in which small lenses are arranged in a matrix, and divides the light emitted from the light source device 30 into a plurality of partial lights. The lens array 322 has substantially the same configuration as the lens array 321 and, together with the superimposing lens 324, partially overlaps a light modulation device 351 described later. The polarization conversion element 323 has a function of aligning random light emitted from the lens array 322 with polarized light that can be used by the light modulation device 351.

  The color separation optical system 33 includes dichroic mirrors 331 and 332, and a reflection mirror 333. The light emitted from the integrator illumination optical system 32 is red light (hereinafter referred to as “R light”), green light (hereinafter referred to as “G light”). And blue light (hereinafter referred to as “B light”).

  The relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to an R light light modulation device 351. The optical unit 3 has a configuration in which the relay optical system 34 guides the R light. However, the configuration is not limited thereto, and may be configured to guide the B light, for example.

The electro-optical device 35 is a light modulation device 351 provided for each color light (the light modulation device for R light is 351R, the light modulation device for G light is 351G, and the light modulation device for B light is 351B). And a cross dichroic prism 352 as a color synthesizing optical device.
The light modulation device 351 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, and an emission-side polarizing plate disposed on the light emission side of the liquid crystal panel. The light modulation device 351 has a rectangular pixel region in which a plurality of micro pixels (not shown) are formed in a matrix, modulates incident color light, and forms a display image of each color light in the pixel region.

  The cross dichroic prism 352 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. The cross dichroic prism 352 reflects the R light and B light modulated by the light modulation devices 351R and 351B, transmits the G light modulated by the light modulation device 351G, and synthesizes each color light.

  The projection lens 36 includes a plurality of lenses (not shown), and magnifies and projects the light combined by the cross dichroic prism 352 onto the projection surface.

[Configuration of light source device]
Here, the light source device 30 will be described in detail.
FIG. 2 is a cross-sectional view schematically showing the light source device 30, as viewed from the direction intersecting the optical axis Ax of the discharge lamp 4.
As illustrated in FIG. 2 and as described above, the light source device 30 includes the discharge lamp 4, the reflector 5, and the intermediate support portion 6.
As shown in FIG. 2, the discharge lamp 4 includes an arc tube 41, a pair of electrodes 42a and 42b, connection members 43a and 43b, and lead terminals 44a and 44b.
The arc tube 41 is made of heat-resistant glass such as quartz glass. As shown in FIG. 2, a spherical light emitting portion 411 provided in the center and a pair of electrodes 42a and 42b are opposed to each other from both sides of the light emitting portion 411. It has the 1st sealing part 412a and the 2nd sealing part 412b which extend along the direction to do. The direction in which the first sealing portion 412a and the second sealing portion 412b extend from the light emitting portion 411 is along the optical axis Ax.

Inside the light emitting portion 411, a discharge space in which mercury, rare gas, halogen, or the like is enclosed is formed, and a pair of electrodes 42a and 42b are arranged to face each other.
One end of each of the pair of electrodes 42a and 42b is close to and opposed to the discharge space, and the other end is disposed in the first sealing portion 412a and the second sealing portion 412b.
The connection member 43a is connected to the electrode 42a and is disposed in the first sealing portion 412a. The connection member 43b is connected to the electrode 42b and is disposed in the second sealing portion 412b.

One end of the lead terminal 44a is connected to the connection member 43a, and the other end is exposed from the first sealing portion 412a. The lead terminal 44b has one end connected to the connection member 43b and the other end exposed from the second sealing portion 412b.
When power is supplied to the lead terminals 44a and 44b, the discharge lamp 4 generates a discharge between the electrodes 42a and 42b facing each other, and emits light.

The reflector 5 is made of glass, and has a cylindrical portion 51 and a reflecting portion 52 that extends from the cylindrical portion 51, as shown in FIG. 2. The reflection part 52 is formed so that the opposite side to the cylindrical part 51 becomes a recess, and a metal thin film is deposited on the surface (reflection surface 52R) of the recess.
The reflector 5 is provided with an insertion hole 511 that penetrates from the cylindrical portion 51 to the reflection portion 52 and into which the first sealing portion 412a is inserted. The insertion hole 511 has a small diameter hole 511a formed on the reflecting portion 52 side, and a large diameter hole 511b formed on the cylindrical portion 51 side. The small diameter hole 511a is formed in a size having a gap 511f between the small diameter hole 511a and the large diameter hole 511b has an inner diameter larger than the inner diameter of the small diameter hole 511a.

The discharge lamp 4 is configured such that the first sealing portion 412a is inserted through the insertion hole 511, and the light emitting portion 411 is positioned on the reflecting surface 52R side. In the discharge lamp 4, the first sealing portion 412 a is connected to the cylindrical portion 51 through the intermediate support portion 6.
The reflector 5 reflects the light emitted from the light emitting unit 411 to the side opposite to the cylindrical part 51.

FIG. 3 is a cross-sectional view schematically showing the light source device 30, and is a cross-sectional view of the cylindrical portion 51 as viewed from the direction along the optical axis Ax.
As shown in FIGS. 2 and 3, the intermediate support portion 6 is disposed between the first sealing portion 412 a and the inner surface of the large-diameter hole 511 b in the insertion hole 511. That is, the intermediate support portion 6 is disposed on the outer periphery of the first sealing portion 412a, and is provided in a part of the insertion hole 511 in the direction in which the first sealing portion 412a extends.

The intermediate support part 6 includes a first member 60 formed of ceramics, metal, or the like. As illustrated in FIG. 3, the first member 60 includes an outer annular portion 61, an inner annular portion 62, and a plurality of convex portions 63.
The outer annular portion 61 is formed in an annular shape having an outer diameter slightly smaller than the inner diameter of the large diameter hole 511b. The inner annular portion 62 has an inner diameter with which the first sealing portion 412a is fitted, and is formed in an annular shape.

The plurality of convex portions 63 connect the outer annular portion 61 and the inner annular portion 62, and along the outer periphery of the first sealing portion 412 a in a cross section perpendicular to the direction in which the first sealing portion 412 a extends. It is provided intermittently. Four convex portions 63 of the present embodiment are provided at equal intervals along the outer periphery of the first sealing portion 412a. A gap 6g is provided between adjacent protrusions 63 among the plurality of protrusions 63. The number of convex portions 63 is not limited to four as long as it is plural.
The light source device 30 is configured to allow air to flow from the outside on the cylindrical portion 51 side to the light emitting portion 411 by providing the gap 6g and the gap 511f (see FIG. 2).

The intermediate support portion 6 can be molded by using a mold or by pressing from a sheet metal. For example, in the case where the intermediate support portion 6 is made of a sheet metal, the fitting with the first sealing portion 412a can be strengthened by forming the intermediate support portion 6 so as to have a spring property using a stainless material or the like. The outer annular portion 61, the inner annular portion 62, and the convex portion 63 can be formed thin to make the gap 6g wider.
Moreover, the structure by which 10 A of adhesive agents are arrange | positioned between the inner side annular part 62 and the 1st sealing part 412a may be sufficient.

The intermediate support portion 6 fitted with the first sealing portion 412a is fixed to the reflector 5 by filling the adhesive 10A between the outer annular portion 61 and the inner surface of the large diameter hole 511b. As the adhesive 10A, an inorganic material containing silica, alumina or the like is used, and its thermal conductivity is about 1.0 W / mK.
Thus, the reflector 5 is fixed to the 1st sealing part 412a via the intermediate | middle support part 6 arrange | positioned on the outer periphery of the 1st sealing part 412a.

  In the light source device 30, the heat capacity of the reflector 5 is larger than the heat capacity of the arc tube 41. Further, an intermediate support portion 6 is disposed between the reflector 5 and the arc tube 41, and heat transfer from the reflector 5 to the arc tube 41 (first sealing portion 412 a) is performed via a plurality of convex portions 63. Therefore, the heat of the reflector 5 is not easily transmitted to the arc tube 41. That is, the heat path from the reflector 5 to the arc tube 41 is reduced by providing the plurality of convex portions 63 intermittently. Accordingly, even when mercury is condensed near the first sealing portion 412a in the discharge space at the time of extinguishing (41H indicated by a two-dot chain line in FIG. 2), the arc tube 41 has a temperature enough to evaporate this mercury. Does not rise. That is, the state where the pair of electrodes 42a and 42b are separated from each other without the occurrence of a mercury bridge is maintained.

  Further, since the light source device 30 is provided with the gap 6g and the gap 511f (see FIG. 2), air blown from a cooling device (not shown) can be circulated through the gap 6g and the gap 511f.

As described above, according to the light source device 30 and the projector 1 of the present embodiment, the following effects can be obtained.
(1) Since the light source device 30 includes the intermediate support portion 6 and can make the heat transfer between the reflector 5 and the arc tube 41 gradual, the temperature increase of the arc tube 41 during extinguishing is suppressed. It is possible to suppress the mercury in the light emitting unit 411 that has been condensed from being evaporated again. Therefore, it is possible to provide the light source device 30 that prevents the occurrence of a mercury bridge at the time of extinction and reliably relights.

  (2) Since the light source device 30 is provided with the gap 6g and the gap 511f (see FIG. 2), the light emitting unit 411 can be cooled with the air blown from the cooling device. Therefore, it is possible to provide the light source device 30 capable of efficiently cooling the light emitting unit 411 even when the light is turned on.

  (3) The intermediate support part 6 is provided in a part of the insertion hole 511 in the direction in which the first sealing part 412a extends. Accordingly, it is possible to narrow a region (heat path) in which heat can move between the arc tube 41 and the reflector 5 in the direction in which the first sealing portion 412a extends. Therefore, the heat transfer from the reflector 5 to the arc tube 41 can be further moderated, and the occurrence of mercury bridge at the time of extinction can be surely prevented.

(4) Since the projector 1 includes the light source device 30 that is reliably turned on again, the power is turned off after the use is finished, and the image can be projected reliably when the power is turned on again.
Further, since the occurrence of the mercury bridge is prevented even when the light source device 30 is not cooled when the light is turned off, the projector 1 that forcibly stops the operation without performing the cool-down operation when the power is turned off is possible. Therefore, it is possible to provide the projector 1 that is easy to use.

(Second Embodiment)
Hereinafter, the light source device 130 according to the second embodiment will be described with reference to the drawings. In the following description, the same components as those of the light source device 30 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 4 is a cross-sectional view schematically showing the light source device 130 of the present embodiment, as viewed from the direction intersecting the optical axis Ax. FIG. 5 is a cross-sectional view schematically showing the light source device 130 as seen from the direction along the optical axis Ax.
As shown in FIGS. 4 and 5, the light source device 130 includes a reflector 7 and an intermediate support portion 8, which are different from the reflector 5 and the intermediate support portion 6 in the light source device 30 of the first embodiment, in addition to the discharge lamp 4. Prepare.

The reflector 7 includes a reflection main body portion 71 and a support portion 72, and is fixed to the discharge lamp 4 via the intermediate support portion 8.
The reflection main body 71 has a size smaller than the size of the reflection portion 711 having the reflection surface 71R substantially the same shape as the reflection surface 52R in the reflector 5 of the first embodiment and the cylindrical portion 51 (see FIG. 2) in the reflector 5. A first tubular portion 712 is provided. The reflection main body 71 is provided with a small-diameter hole 71 h that penetrates from the first tubular portion 712 to the reflection main body 71.

The support part 72 has a part of the reflection part 711, a laminated part 721 laminated on the first tubular part 712, and a second tubular part 722 extending from the laminated part 721 to the opposite side of the reflective part 711. doing.
The second cylindrical portion 722 is formed with a large-diameter hole 72h into which a part of the first cylindrical portion 712 is inserted and a vent hole 723. The small diameter hole 71h and the large diameter hole 72h are insertion holes 70h through which the first sealing portion 412a is inserted. The small diameter hole 71h is formed in a size having a gap 71f between the small diameter hole 71h and the large diameter hole 72h has an inner diameter larger than the inner diameter of the small diameter hole 71h.
The air holes 723 are holes that allow the large-diameter hole 72h to communicate with the outside, and a plurality of the air holes 723 are formed in the vicinity of the stacked portion 721.

  The support portion 72 is fixed to the reflection main body 71 by filling the adhesive 10 </ b> B between the inner surface of the laminated portion 721 and the reflection main body 71. Adhesive 10B is formed of the same material as adhesive 10A.

  As shown in FIG. 4, the intermediate support portion 8 includes a second member 80 in addition to the first member 60 in the first embodiment. The intermediate support portion 8 includes the first cylindrical portion 712 and the vent hole 723 in the direction in which the first sealing portion 412a extends between the first sealing portion 412a and the inner surface of the large-diameter hole 72h. Are arranged on the opposite side. That is, the intermediate support portion 8 is provided in a part of the insertion hole 70h in the direction in which the first sealing portion 412a extends.

  The 2nd member 80 is arrange | positioned between the adjacent convex parts 63 among the several convex parts 63, and the 2nd member 80 is filled between the adjacent convex parts 63 in this embodiment. The second member 80 is a member having a thermal conductivity smaller than that of the arc tube 41 (first sealing portion 412a). For example, when the arc tube 41 is made of quartz glass (thermal conductivity: 1.38 to 2.68 W / mK), the second member 80 may be, for example, a silicon rubber material (thermal conductivity: 0.2 W). / MK), coal (thermal conductivity: about 0.03 W / mK), glass wool (thermal conductivity: about 0.04 W / mK), and the like can be used.

The intermediate support portion 8 fitted with the first sealing portion 412a is fixed to the second cylindrical portion 722 by filling the adhesive 10A between the outer annular portion 61 and the inner surface of the large diameter hole 72h.
As described above, in the light source device 130, the reflector 7 includes the reflection main body 71 and the support 72, and the reflector 7 includes the plurality of convex portions 63 and the second member 80 disposed between the adjacent convex portions 63. And is fixed to the discharge lamp 4.

  Since the light source device 130 is composed of two reflectors 7, heat is transmitted from the reflection main body 71 to the second tubular portion 722 from the reflection portion 52 of the first embodiment to the tubular portion 51. It is harder to transmit than the way heat is transmitted. Furthermore, in the light source device 130, the movement of heat from the second tubular portion 722 to the first sealing portion 412 a is performed via the plurality of convex portions 63 and the second member 80, and thus the second tubular portion 722. Is not easily transmitted to the first sealing portion 412a. As a result, when the lamp is turned off, the temperature rise of the arc tube 41 is suppressed, and a state in which the pair of electrodes 42a and 42b are separated from each other without the occurrence of a mercury bridge is maintained.

  In addition, since the light source device 130 is provided with a vent hole 723 and a gap 71f (see FIG. 4), air blown from a cooling device (not shown) is circulated through the vent hole 723 and the gap 71f, and the light emitting unit 411 is disposed. Can be cooled.

As described above, according to the light source device 130 of the present embodiment, the following effects can be obtained.
(1) In the discharge lamp 4, the reflector 7 is fixed via a plurality of convex portions 63 and a second member 80 having a thermal conductivity smaller than that of the first sealing portion 412a. As a result, it is possible to prevent the occurrence of a mercury bridge by making it difficult for heat to be transmitted from the reflector 7 to the arc tube 41, and to more firmly fix the reflector 7 to the discharge lamp 4 via the intermediate support portion 8. Become.

  (2) The reflector 7 includes a reflection main body portion 71 and a support portion 72, and the support portion 72 is fixed to the discharge lamp 4 via the intermediate support portion 8. This makes it possible to lower the temperature of the second cylindrical portion 722 that holds the first sealing portion 412a and to easily form the vent hole 723 as compared to the reflector 5 of the first embodiment that is integrally formed. It becomes. Therefore, it is possible to provide the light source device 130 that can prevent the occurrence of a mercury bridge when the light is turned off and can efficiently cool the light emitting unit 411 even when the light is turned on.

(Modification)
In addition, you may change the said embodiment as follows.
The first member 60 in the intermediate support portions 6 and 8 of the embodiment has the outer annular portion 61 and the inner annular portion 62, but has one of the outer annular portion 61 and the inner annular portion 62. Is also possible.
FIG. 6 is a schematic diagram for explaining an intermediate support portion 9A which is an example of a modified example, and shows an intermediate support portion 9A arranged in place of the intermediate support portions 6 and 8 of the light source devices 30 and 130 described above. FIG.
The intermediate support portion 9 </ b> A includes a first member 91. As shown in FIG. 6, the first member 91 does not have the outer annular portion 61 in the embodiment, but has an inner annular portion 911 and a plurality of convex portions 912. The first member 91 is fixed to the tubular portion 51 or the second tubular portion 722 via an adhesive 10A provided outside the convex portion 912.
In addition, the intermediate support portion 9A shown in FIG. 6 is configured such that a gap 91g is formed between adjacent convex portions 912. The gap 91g has a thermal conductivity smaller than that of the arc tube 41. The structure by which two members are arrange | positioned may be sufficient.

FIG. 7 is a schematic diagram for explaining an intermediate support portion 9B which is another modified example, and shows an intermediate support portion 9B arranged in place of the intermediate support portions 6 and 8 of the light source devices 30 and 130 described above. FIG.
The intermediate support portion 9B includes a first member 92. As shown in FIG. 7, the first member 92 does not have the inner annular portion 62 in the embodiment, but has an outer annular portion 921 and a plurality of convex portions 922. The first member 92 is fixed to the tubular portion 51 or the second tubular portion 722 via an adhesive 10A provided outside the outer annular portion 921.
In addition, the intermediate support portion 9B shown in FIG. 7 is configured such that a gap 92g is formed between the adjacent convex portions 922. The gap 92g has a thermal conductivity smaller than that of the arc tube 41. The structure by which two members are arrange | positioned may be sufficient.

FIG. 8 is a schematic diagram for explaining an intermediate support portion 9C which is another modified example, and shows an intermediate support portion 9C arranged in place of the intermediate support portions 6 and 8 of the light source devices 30 and 130 described above. FIG.
9C of intermediate | middle support parts are provided with the 1st member 93 formed with the adhesive agent which has the component similar to adhesive agent 10A. The first member 93 is filled between the first sealing portion 412a and the cylindrical portion 51 or the second cylindrical portion 722 and solidified, and then a plurality of gaps 93g are formed as shown in FIG. Formed by processing. The intermediate support portion 9C has a plurality of convex portions 931 provided intermittently along the outer periphery of the first sealing portion 412a in a cross section in a direction perpendicular to the direction in which the first sealing portion 412a extends. It will be.
Further, the intermediate support portion 9C shown in FIG. 8 is configured such that a gap 93g is formed between the adjacent convex portions 931. The gap 93g has a thermal conductivity smaller than that of the arc tube 41. The structure by which two members are arrange | positioned may be sufficient.

You may comprise the optical apparatus by which the 2nd member of thermal conductivity smaller than the thermal conductivity of the arc_tube | light_emitting_tube 41 is arrange | positioned in the space | gap 6g in the light source device 30 of 1st Embodiment.
Moreover, you may comprise the optical apparatus in which the site | part in which the 2nd member 80 in the light source device 130 of 2nd Embodiment is arrange | positioned becomes a space | gap.

  The projector 1 according to the embodiment includes the light modulation device 351 having a transmissive liquid crystal panel, but may be configured to include a light modulation device having a reflective liquid crystal panel. Moreover, the structure provided with the micromirror type light modulation apparatus, for example, DMD (Digital Micromirror Device) etc., may be sufficient.

  The projector 1 of the embodiment employs a so-called three-plate method using three light modulation devices corresponding to R light, G light, and B light, but is not limited thereto, and adopts a single plate method. Alternatively, the present invention can be applied to a projector including two or four or more light modulation devices.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 4 ... Discharge lamp, 5, 7 ... Reflector, 6, 8, 9A, 9B, 9C ... Intermediate support part, 6g, 91g, 92g, 93g ... Air gap, 30, 130 ... Light source device, 36 ... Projection lens (Projection optical device), 41 ... arc tube, 42a, 42b ... electrode, 60, 91, 92, 93 ... first member, 63, 912, 922, 931 ... convex portion, 70h, 511 ... insertion hole, 80 ... first. Two members, 351... Light modulation device, 411... Light emitting portion, 412 a... First sealing portion, 412 b.

Claims (5)

A discharge lamp having a light emitting portion in which a pair of electrodes are disposed facing each other, and a first sealing portion extending from the light emitting portion;
An intermediate support portion disposed on an outer periphery of the first sealing portion;
A reflector that is fixed to the first sealing part via the intermediate support part and reflects light emitted from the light emitting part;
With
The intermediate support portion includes a first member having a plurality of convex portions provided intermittently along an outer periphery of the first sealing portion in a direction perpendicular to a direction in which the first sealing portion extends. A light source device. The light source device according to claim 1,
The light source device, wherein the intermediate support portion is provided with a gap between the adjacent convex portions of the plurality of convex portions. The light source device according to claim 1,
The intermediate support portion includes a second member disposed between the adjacent convex portions among the plurality of convex portions,
The light source device, wherein the second member has a thermal conductivity smaller than that of the first sealing portion. The light source device according to any one of claims 1 to 3,
The reflector has an insertion hole through which the first sealing portion is inserted,
The intermediate support portion is provided in a part of the insertion hole in a direction in which the first sealing portion extends. The light source device according to any one of claims 1 to 4,
A light modulation device that modulates light emitted from the light source device;
A projection optical device for projecting light modulated by the light modulation device;
A projector comprising:

Images