JP2014048554A - Light source device and projector - Google Patents

Abstract

An object of the present invention is to improve the controllability of cooling air, to optimize the temperature of the upper and lower parts of the light emitting part, and to make the entire light emitting part have a balanced temperature distribution, and to improve the installation posture. A light source device that can cope with a change and a projector including the light source device are provided.
A light source device includes an arc tube having a light emitting part and sealing parts, and a reflector having a reflection surface and an insertion hole through which the sealing part is inserted, and an insertion hole. 611 is fixed to the reflector 6 so as to fix the one sealing portion 52 </ b> A, and the opening and closing operations of the fixing member 7 having the vent 73 that communicates the inner surface side and the outer surface side of the reflector 6 are performed. And an opening / closing part 74 for performing. The opening / closing part 74 includes an opening / closing lid 76 that opens and closes the vent 73 and a support shaft 75 that rotatably supports the opening / closing lid 76 on the fixing member 7. The opening / closing part 74 is supported by its own weight. Opening and closing operations are performed by rotating around the shaft 75.
[Selection] Figure 3

Description

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

  Conventionally, there is known a projector that modulates and projects a light beam emitted from a light source device according to image information. In recent years, in order to display a projected image clearly, a light source device is required to have high brightness, and a light source such as an ultra-high pressure mercury lamp is used.

  FIG. 8 is a schematic cross-sectional view showing a conventional light source device 200. As shown in FIG. 8, the light source device 200 includes an arc tube 210, a reflector 220, and a fixing member 230. The arc tube 210 includes a light emitting part 211 that emits a light beam and a pair of sealing parts 212 that extend from both sides of the light emitting part 211. The reflector 220 has a reflection surface 221 that reflects a light beam on the inner surface side, and has an insertion hole 222 through which one sealing portion 212a is inserted. The fixing member 230 fixes one sealing portion 212 a inserted through the insertion hole 222 and is fixed to the reflector 220. In addition, the fixing member 230 is provided with a vent 231 that allows communication between the space on the inner surface side of the reflector 220 and the space on the outer surface side of the reflector 220.

  In addition, an inflow port 250 through which the cooling air D flows into the reflector 220 is provided on the upper and lower sides of the opening end 223 that is the light beam exit side of the reflector 220. Further, an exhaust port (not shown) is installed on the horizontal side with respect to the inlet 250 installed on the upper and lower sides. The upper and lower inflow ports 250 are configured such that cooling air D flows from the upper inflow port 250 in accordance with the installation posture of the light source device 200 (installation posture of the projector).

  The cooling air D that has flowed into the reflector 220 from the upper inlet 250 of the light source device 200 flows into the light emitting unit 211, takes away heat generated by light emission, and the heated cooling air D is exhausted from the exhaust port. Thus, the light emitting unit 211 is cooled. At this time, the warmed cooling air D flows through the vent 231 provided in the fixing member 230 and is also exhausted to the outer surface side of the reflector 220.

  When the light emitting unit 211 is cooled, the upper part 211a of the light emitting part 211 generates heat compared to the lower part 211b. Therefore, the upper part 211a of the light emitting part 211 is actively cooled and the lower part 211b of the light emitting part 211 is also appropriately cooled. Thus, it is important to cool the upper part 211a and the lower part 211b of the light emitting unit 211 so that the temperature of the upper part 211a and the lower part 211b becomes appropriate and the temperature of the entire light emitting part 211 has a balanced temperature distribution. For this purpose, it is important to cause the cooling air D to flow in the reflector 220.

  In addition, like the lamp unit (light source device) described in Patent Document 1, an intake fan is provided in an air intake duct that is provided with an upper intake hole and a lower intake hole in the neck portion of the reflector and covers the neck portion. There is also a configuration in which the wind that flows through the upper intake hole and the lower intake hole directly cools the light emitting unit by blowing the air from the air.

JP 2004-276786 A

However, in the cooling of the light source device, in the conventional cooling mainly using the inflow port and the exhaust port and additionally using the vent hole provided in the fixing member, the upper and lower temperatures of the light emitting unit become appropriate temperatures. As described above, there is a problem that it is difficult to control the cooling air. Similarly, there is a problem that it is difficult to control the cooling air so that the entire light emitting unit has a balanced temperature distribution. Further, there is a similar problem in cooling when the installation posture of the light source device is changed.
Therefore, it is possible to improve the controllability of the cooling air, optimize the temperature of the upper and lower parts of the light emitting unit, and make the entire light emitting unit have a balanced temperature distribution, and change the installation posture. There has been a demand for a light source device that can cope with the above and a projector including the light source device.

  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) a light-emitting tube having a light-emitting portion that emits a light beam and a pair of sealing portions that extend on both sides of the light-emitting portion; and (b) reflecting the light beam. And a reflector having an insertion hole through which one sealing portion is inserted from the inner surface side, and (c) a reflector that covers the insertion hole and is fixed to the reflector, and is inserted into the insertion hole. A fixing member having a vent hole that fixes the other sealing portion and communicates the inner surface side and the outer surface side of the reflector, and (d) an opening / closing portion that opens and closes the vent port. Features.

  According to such a light source device, it is configured to include an arc tube, a reflector, a fixing member, and an opening / closing part, and the opening / closing part opens and closes the vent hole of the fixing member. With this configuration, the light source device opens and closes the air vents at the opening and closing unit, thereby opening the air vents and reflecting the cooling air flowing through the inner surface of the reflector to cool the arc tube. It is possible to perform control for exhausting to the outer surface side, and control not to exhaust the cooling air by closing the vent hole. Thereby, the light source device can improve the controllability of the cooling air flowing on the inner surface side of the reflector. For this reason, it is possible to optimize the temperatures of the upper and lower portions of the light emitting section and to make the entire light emitting section have a balanced temperature distribution.

  Application Example 2 In the light source device according to the application example described above, the opening / closing unit includes an opening / closing member that opens and closes the vent and a support shaft that rotatably supports the opening / closing member on the fixing member. It is preferable to perform the opening / closing operation by rotating around the support shaft by the weight of the opening / closing member.

  According to such a light source device, the opening / closing part opens or closes the vent hole by rotating with respect to the fixed member around the support shaft by the weight of the opening / closing member. With this configuration, the opening / closing unit can be realized with a simple configuration.

  Application Example 3 In the light source device according to the application example described above, a plurality of vent holes are provided on the side surface portion of the fixing member extending in a direction substantially parallel to the optical axis, and the opening / closing portions correspond to the plurality of vent holes. It is preferable that it is installed.

  According to such a light source device, since the opening / closing portion is provided for each of the plurality of vent holes installed in the side surface portion of the fixing member extending in a direction substantially parallel to the optical axis, the installation posture of the light source device Even if the air pressure changes, the vent can be selectively opened and closed. Therefore, even if the installation posture of the light source device changes, it is possible to optimize the temperatures of the upper and lower portions of the light emitting unit and to make the entire light emitting unit have a balanced temperature distribution.

  Application Example 4 In the light source device according to the application example described above, it is preferable that the plurality of vent holes are installed substantially symmetrically with respect to the optical axis.

  According to such a light source device, the plurality of vent holes are installed substantially symmetrically with respect to the optical axis, so that the temperature of the upper and lower portions of the light emitting unit and the light emission can be changed even if the installation posture of the light source device changes. The temperature distribution of the part can be set to substantially the same temperature or temperature distribution. Thereby, variations in temperature and temperature distribution due to the difference in attitude of the light source device can be suppressed, and stable cooling can be performed.

  Application Example 5 In the light source device according to the application example described above, the opening and closing unit includes a rotating member in which an opening is formed at a predetermined position, a support unit that rotatably supports the rotating member on the fixed member, Preferably, the opening / closing part performs an opening / closing operation of opening an area where the opening and the vent overlap each other by rotating the rotating member.

  According to such a light source device, the opening / closing part includes the rotating member and the support part. Moreover, since the opening part is formed in the predetermined position, the rotation member is supported by the support part and rotates with respect to the fixed member due to the deviation of the center of gravity of the rotation member. By this operation, the region where the opening of the rotating member overlaps with the vent is opened so that the inner surface side and the outer surface of the reflector communicate with each other, and the region where the opening and the vent do not overlap, or the rotating member It is not opened in regions other than the opening. With this configuration, the light source device can improve the ease of control of the cooling air flowing on the inner surface side of the reflector. For this reason, it is possible to optimize the temperatures of the upper and lower portions of the light emitting section and to make the entire light emitting section have a balanced temperature distribution. Moreover, even if the installation posture of the light source device is changed, variations in temperature and temperature distribution due to a difference in posture can be suppressed, and stable cooling can be performed.

  Application Example 6 In the light source device according to the application example described above, the vent is installed on a side surface portion of the fixed member extending in a direction substantially parallel to the optical axis, and the rotating member is substantially cylindrical corresponding to the vent. It is preferable that it is formed in a shape.

  According to such a light source device, the rotating member can be realized with a simple configuration by forming the rotating member in a substantially cylindrical shape corresponding to the vent hole installed in the side surface portion of the fixed member. The vent can be easily opened and closed.

  Application Example 7 In the light source device according to the application example described above, the vent is installed at an end surface portion of the fixing member that is substantially orthogonal to the optical axis, and the rotating member is substantially plate-shaped corresponding to the vent. Preferably it is formed.

  According to such a light source device, the rotation member can be realized with a simple configuration by forming the rotation member in a substantially plate shape corresponding to the vent hole installed in the end surface portion of the fixed member, The vent can be easily opened and closed.

  Application Example 8 In the light source device according to the application example, it is preferable that the rotating member has a weight and is rotated by the weight.

  According to such a light source device, since the rotating member has the weight, the rotating member can be easily rotated around the support portion. Therefore, the opening / closing operation of the opening / closing part can be performed smoothly.

  Application Example 9 In the light source device according to the application example described above, it is preferable that a plurality of openings are formed.

  According to such a light source device, since a plurality of openings are formed, the vent can be selectively opened and closed even if the installation posture of the light source device changes. Therefore, even if the installation posture of the light source device changes, it is possible to optimize the temperatures of the upper and lower portions of the light emitting unit and to make the entire light emitting unit have a balanced temperature distribution.

  Application Example 10 In the light source device according to the application example described above, it is preferable that the plurality of openings are formed substantially symmetrically with respect to the optical axis.

  According to such a light source device, since the plurality of openings are installed substantially symmetrically with respect to the optical axis, the opening / closing operation of the vent by the opening / closing unit changes the installation posture of the light source device. However, the temperature of the upper part and the lower part of the light emitting part and the temperature distribution of the light emitting part can be set to substantially the same temperature and temperature distribution. Thereby, variations in temperature and temperature distribution due to the difference in attitude of the light source device can be suppressed, and stable cooling can be performed.

  Application Example 11 A projector according to this application example includes the light source device described above and a light modulation device that modulates a light beam emitted from the light source device in accordance with image information.

  According to such a projector, it is possible to improve the controllability of the cooling air flowing on the inner surface side of the reflector, to optimize the temperature of the upper and lower parts of the light emitting part, and to balance the entire light emitting part. Since the light source device that can be set to the temperature distribution and can cope with the change in the installation posture is provided, the life of the light source device can be extended. Therefore, the optical quality such as the brightness of the projected image can be maintained for a long time. Moreover, since the replacement time of the light source device can be extended, the convenience of the projector can be improved.

  Application Example 12 In the projector according to the application example described above, the projector has ducts that are installed on the upper side and the lower side of the reflector to allow cooling air to flow into the inner surface side of the reflector, and corresponds to the installation posture of the light source device. It is preferable to provide a cooling mechanism that allows cooling air to flow from one duct on the upper side.

  According to such a projector, by providing the above-described cooling mechanism, cooling arcs are caused to flow from the upper duct into the reflector inner surface to cool the arc tube. Further, by selectively opening and closing the vent through the opening and closing operation of the opening and closing unit, the cooling air warmed by cooling the arc tube can be exhausted from the opened vent to the outer surface side of the reflector. In this way, by cooling the arc tube with the cooling mechanism and the above-described light source device, proper temperature control can be performed by mainly using the vent hole of the fixing member that has been conventionally used in an auxiliary manner. A projector capable of being realized can be realized.

FIG. 1 is a diagram schematically illustrating a schematic configuration of a projector according to a first embodiment. 1 is a schematic cross-sectional view of a light source device. The schematic which looked at the light source device from back. It is the schematic which shows the light source device which concerns on 2nd Embodiment, (a) is a perspective view of a fixing member, (b) is a schematic sectional drawing of a light source device. It is a schematic sectional drawing of a light source device, (a) is the figure which cut | disconnected the fixing member periphery at XY plane which passes along an illumination optical axis, (b) is the figure which cut | disconnected the fixing member periphery at the XZ plane which passes an illumination optical axis . The schematic which looked at the light source device from back. It is the schematic which shows the light source device which concerns on 3rd Embodiment, (a) is a schematic sectional drawing of a light source device, (b) is the schematic which looked at the light source device from back. FIG. 6 is a schematic cross-sectional view showing a conventional light source device.

Hereinafter, embodiments will be described with reference to the drawings.
(First embodiment)

  FIG. 1 is a diagram schematically illustrating a schematic configuration of a projector 1 according to the first embodiment. FIG. 1 is a view of the internal configuration of the projector 1 installed on the desk as viewed from above. The projector 1 according to the present embodiment is installed on a ceiling in addition to being installed on a desk. For convenience of explanation, it is assumed that the projector 1 is installed on a desk. With reference to FIG. 1, a schematic configuration of the projector 1 according to the present embodiment will be described.

  In the subsequent drawings including FIG. 1, for convenience of explanation, it is described in an XYZ orthogonal coordinate system. In the XYZ orthogonal coordinate system, the direction along the illumination optical axis OA, which is the traveling direction of the light beam emitted from the light source device 4, is defined as the X (+ X) direction. A direction orthogonal to the X direction and opposite to the direction in which the image light is emitted from the projection lens 35 is defined as a Y (+ Y) direction. Furthermore, the Z direction (+ Z) is defined as an upward direction (a direction against the gravitational direction) orthogonal to the X direction and the Y direction and installed on the desk.

  When the + X direction is the front, the −X direction is the rear, the −Y direction when the light source device 4 is viewed from the rear (−X direction) is the right direction, the + Y direction is the left direction, the + Z direction is the upper direction, and −Z Use as appropriate with the direction down. Further, in the subsequent drawings including FIG. 1, the dimensions and ratios of the respective constituent elements are shown as appropriately different from the actual ones in order to make each constituent element large enough to be recognized on the drawing.

  The projector 1 according to this embodiment is a device that modulates the light beam emitted from the light source device 4 according to image information and enlarges and projects it on a projection surface such as a screen (not shown). As shown in FIG. 1, the projector 1 includes an optical unit 3, a control unit (not shown), a power supply unit (not shown) that supplies power to the control unit, and a cooling mechanism 2 that cools the inside of the projector 1 (FIG. 2). Etc.) and these are accommodated in the exterior housing 10.

  As shown in FIG. 1, the optical unit 3 houses the light source device 4, the illumination optical device 31, the color separation optical device 32, the relay optical device 33, the electro-optical device 34, and these optical devices 4, 31 to 34. In addition, an optical component casing 36 for supporting and fixing the projection lens 35 at a predetermined position is provided.

  The light source device 4 includes a discharge-type arc tube 5, a reflector 6, and a fixing member 7, and is accommodated in a light source casing 41. The light source device 4 reflects the light beam emitted from the arc tube 5 by the reflector 6 and then emits it toward the collimating lens 310. The light source device 4 of this embodiment employs an ultrahigh pressure mercury lamp. Details of the light source device 4 will be described later.

  The illumination optical device 31 includes a collimating lens 310, a first lens array 311, a second lens array 312, a polarization conversion element 313, a superimposing lens 314, and a condenser lens 315. In the present embodiment, the collimating lens 310 is installed in the light source casing 41 of the light source device 4, aligns the emission direction of the light beam emitted from the light source device 4, and is parallel to the illumination optical axis OA. And emitted to the illumination optical device 31 (first lens array 311). The illumination optical axis OA as the optical axis is the central axis of the light beam emitted from the light source device 4 to the illuminated area side. The first lens array 311 splits the light beam emitted from the light source device 4 into partial light beams and emits them in a direction along the illumination optical axis OA. The second lens array 312 emits the partial light beams emitted from the first lens array 311 toward the superimposing lens 314, respectively.

  The polarization conversion element 313 has a function of substantially aligning each partial light beam, which is random polarized light emitted from the second lens array 312, with one type of polarized light that can be used in the liquid crystal panel 342. Each partial light beam emitted from the second lens array 312 and converted into substantially one type of polarized light by the polarization conversion element 313 is substantially superimposed on the surface of the liquid crystal panel 342 by the superimposing lens 314. Note that the light beam emitted from the superimposing lens 314 is collimated by the condenser lens 315 and superimposed on the liquid crystal panel 342. In detail, the condenser lens 315 is provided for each of three color lights described later.

  The color separation optical device 32 includes a first dichroic mirror 321, a second dichroic mirror 322, and a reflection mirror 323. The color separation optical device 32 separates the light beam emitted from the illumination optical device 31 into three color lights of red (R) light, green (G) light, and blue (B) light.

  The relay optical device 33 includes an incident side lens 331, a relay lens 333, and reflection mirrors 332 and 334. The relay optical device 33 guides the R light separated by the color separation optical device 32 to the liquid crystal panel 342R for R light. In the present embodiment, the relay optical device 33 is configured to guide the R light. However, the present invention is not limited to this. For example, the relay optical device 33 may be configured to guide the B light.

  The electro-optical device 34 includes three incident-side polarizing plates 341 and three liquid crystal panels 342 as light modulators (an R light liquid crystal panel 342R, a G light liquid crystal panel 342G, and a B light liquid crystal panel). 342B), three exit-side polarizing plates 343, and one cross dichroic prism 345.

  The liquid crystal panel 342 (342R, 342G, 342B) modulates the light beam separated for each color light by the color separation optical device 32 according to image information. The cross dichroic prism 345 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 345 synthesizes the color lights modulated by the liquid crystal panels 342R, 342G, and 342B and emits them to the projection lens 35.

  The projection lens 35 is composed of a combined lens in which a plurality of lenses are combined, and enlarges and projects the light beam modulated and synthesized by the electro-optical device 34 onto a projection surface such as a screen.

  FIG. 2 is a schematic cross-sectional view of the light source device 4. FIG. 2 is a diagram specifically showing the light source device 4 cut along an XZ plane passing through the illumination optical axis OA. FIG. 3 is a schematic view of the light source device 4 as viewed from the rear. Specifically, FIG. 3 shows a schematic cross-sectional view of the fixing member 7 including the vent 73 and the opening / closing part 74 taken along the YZ plane. The configuration of the light source device 4 will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the light source device 4 includes an arc tube 5, a reflector 6, and a fixing member 7. The fixing member 7 is installed behind the neck portion 61 of the reflector 6 so as to cover the neck portion 61. The arc tube 5 is formed of quartz glass or the like, and as shown in FIG. 2, a spherical light emitting portion 51 provided in the center and a pair of sealing portions 52A and 52B extending from both sides of the light emitting portion 51. have.

  As shown in FIG. 2, a discharge space in which mercury, a rare gas, halogen, or the like is enclosed is formed in the light emitting unit 51, and a pair of electrodes 53A and 53B whose tips are close to each other are disposed. ing. Inside the pair of sealing portions 52A and 52B, one end portions are electrically connected to the lead wires 54A and 54B in which electrodes 53A and 53B are formed at one end portions and the other end portions of the lead wires 54A and 54B, respectively. Metal foils 55A and 55B made of molybdenum are arranged.

  Further, inside the pair of sealing portions 52A and 52B, one end portions of the lead wires 56A and 56B extending to the outside of the arc tube 5 are electrically connected to the other end portions of the metal foils 55A and 55B, respectively. It is connected. When power is supplied to the lead wires 56A and 56B, the light emitting unit 51 generates a discharge between the electrodes 53A and 53B that are close to each other and emits a light beam.

  The reflector 6 is made of heat-resistant glass, and has a cylindrical neck 61 and a reflecting part 62 having a spheroidal surface as shown in FIG. The neck portion 61 is provided with an insertion hole 611 through which one sealing portion 52A is inserted. The arc tube 5 is fixed to the fixing member 7 with the adhesive 11 after the tip of the sealing portion 52 </ b> A protrudes from the insertion hole 611 and is inserted into the fixing hole 721 of the fixing member 7 described later. Thereby, the arc tube 5 (light emitting portion 51) is arranged on the inner surface side of the reflecting portion 62. The reflection unit 62 has a reflection surface 621 having a metal thin film deposited on the inner surface, and reflects the light beam emitted from the light emitting unit 51.

  The fixing member 7 has a cylindrical side surface portion 71 extending in a direction substantially parallel to the illumination optical axis OA, and an end surface portion that is substantially orthogonal to the illumination optical axis OA and disposed on the opposite side of the light emission direction. 72. Specifically, as shown in FIG. 3, the side surface portion 71 is formed in a cylindrical shape having an octagonal shape.

  The fixing member 7 has a fixing hole 721 for fixing the sealing portion 52 </ b> A of the arc tube 5 at the center of the end surface portion 72. The sealing portion 52A is fixed to the fixing hole 721 via the adhesive 11 (see FIG. 2). Further, the front end portion 711 (see FIG. 2) of the side surface portion 71 of the fixing member 7 is fixed to the back surface 622 of the reflector 6 via the adhesive 11. As a result, the fixing member 7 holds the arc tube 5 and is fixed to the reflector 6.

  As shown in FIG. 3, vent holes 73 (731, 732, 733, 734) are formed in the vertical direction (± Z direction) and the horizontal direction (± Y direction) of the side surface portion 71 of the fixing member 7. In other words, the four vent holes 73 are installed symmetrically with respect to the illumination optical axis OA. By this vent 73, the inner surface side and the outer surface side of the reflector 6 are communicated.

  On the side surface 71 of the fixing member 7, an opening / closing portion 74 that performs an opening / closing operation corresponding to the vent 73 is installed. The opening / closing part 74 includes support shafts 75 (751, 752, 753, 754) respectively installed on the outer surface of the side part 71 that is the outer periphery of the vent 73. The opening / closing part 74 includes an opening / closing lid 76 (761, 762, 763, 764) as an opening / closing member that is rotatably supported by the support shaft 75. With this configuration, the support shaft 75 supports the opening / closing lid 76 to be rotatable with respect to the fixing member 7, so that the opening / closing lid 76 opens and closes the vent 73.

  Specifically, the opening / closing lid 76 rotates around the support shaft 75 by its own weight to perform an opening / closing operation. Therefore, as shown in FIG. 3, in this embodiment, the lower vent 732 and the right vent 734 are opened, and the upper vent 731 and the left vent 733 are closed.

The configuration of the cooling mechanism 2 that cools the light source device 4 of the present embodiment will be briefly described with reference to FIGS.
In the light source device 4 of the present embodiment, the front opening end 623 on the light beam exit side of the reflector 6 is fixed to the light source casing 41. The light source casing 41 is provided with a duct 411 that flows cooling air A from a cooling fan (not shown) as the cooling mechanism 2. In addition, as the cooling mechanism 2, an inlet 412 through which the cooling air A flowing through the duct 411 flows into the reflector 6 is installed on the upper and lower sides (± Z side) in the vicinity of the opening end 623. On the left right side (± Y side), an exhaust port 413 (see FIG. 3) for exhausting the cooling air A flowing in the reflector 6 is provided.

  In the light source casing 41, when the cooling air A from the cooling fan flows into the duct 411, the cooling air A flows into the upper duct 411 and does not flow into the lower duct 411. A switching plate (not shown) for switching the flow direction is installed. The switching plate is configured to operate according to gravity (not shown). Even when the installation posture of the light source device 4 changes (desktop installation or ceiling installation), the cooling air A always flows into the reflector 6 from the inlet 412 on the upper side of the light source device 4.

Next, the flow of the cooling air A will be described with reference to FIGS.
The cooling air A that has flowed into the reflector 6 from the upward inflow port 412 flows so as to be blown toward the light emitting unit 51. Then, the cooling air A flows on the outer surface (upper, horizontal, lower, front, rear, etc.) of the light emitting part 51 to take away the heat of the light emitting part 51 that has generated heat, and then flows into the fixing member 7. The air flow is divided roughly into the wind A1 and the cooling air A2 that flows to the left and right exhaust ports 413 installed in the light source casing 41 after the heat of the light emitting section 51 that has flowed through the outer surface of the light emitting section 51 and generates heat. To do.

  The cooling air A <b> 1 flows through the outer surface of the arc tube 5 (mainly the light emitting portion 51) and cools, then flows through the insertion hole 611, and is formed in the fixing member 7. From 732 and 734, it exhausts to the outer surface side of the fixing member 7 (outer surface side of the reflector 6). The cooling air A1 is branched into the cooling air A11 and A12 through the two vent holes 732 and 734 and exhausted.

  The cooling air A <b> 2 flows on the outer surface of the arc tube 5 (mainly the light emitting portion 51) and cools, then flows on the reflection surface 621 of the reflector 6, and the left and right exhaust ports 413 installed in the light source casing 41. From the light source casing 41. The cooling air A2 is branched into the cooling air A21 and A22 via the left and right exhaust ports 413 and exhausted.

  The above description is based on the assumption that the projector 1 is installed on a desk. However, the projector 1 is also supported when the projector 1 is inverted (rotated 180 degrees) and installed on the ceiling. The operation of the light source device 4 (operation of the opening / closing unit 74) and cooling when the projector 1 is suspended from the ceiling will be briefly described.

  By reversing the projector 1, the housed light source device 4 is also reversed (rotated 180 degrees). In the light source device 4, in response to the reversal of the installation posture, the opening / closing unit 74 opens the vent 731 and the vent 733 that are closed when installed on the desk, and the vent 732 and vent that are opened. 734 is occluded.

  And as for the cooling air A, the duct 411 which became the lower side when it was installed on a desk by the light source device 4 being inverted is located on the upper side. When the switching plate is operated, the cooling air A flows into the duct 411 located on the upper side, and flows into the reflector 6 from the inlet 412. In addition, the cooling air A flowing into the reflector 6 flows on the outer surface of the inverted light emitting portion 51 (the arc tube 5), part of which is exhausted through the vents 731 and 733, and the rest is the left and right exhausts. The air is exhausted through the mouth 413.

According to the embodiment described above, the following effects can be obtained.
The light source device 4 according to the present embodiment includes an arc tube 5, a reflector 6, a fixing member 7, and an opening / closing portion 74 (support shaft 75, opening / closing lid 76), and the ventilation opening / closing portion 74 is installed on the fixing member 7. The mouth 73 is opened and closed. With this configuration, the light source device 4 performs the opening / closing operation of the vent 73 by the opening / closing portion 74, thereby venting the cooling air A flowing on the inner surface side of the reflector 6 to cool the arc tube 5. Control is performed to open the vents 732 and 734) to exhaust the cooling air A to the outer surface side of the reflector 6, and control to close the vent 73 (vents 731 and 733) and not to exhaust the cooling air A. It can be carried out. Thereby, the light source device 4 can improve the controllability of the cooling air A flowing on the inner surface side of the reflector 6. For this reason, it is possible to optimize the temperatures of the upper and lower portions of the light emitting unit 51 and to make the entire light emitting unit 51 have a balanced temperature distribution.

  In the light source device 4 of the present embodiment, the opening / closing part 74 rotates with respect to the fixing member 7 around the support shaft 75 by the weight of the opening / closing lid 76 to open or close the vent 73. With this configuration, the opening / closing unit 74 can be realized with a simple configuration.

  In the light source device 4 of the present embodiment, the opening / closing part 74 is provided for each of the four vents 731, 732, 733, and 734 installed in the side part 71 of the fixing member 7, so that the installation posture changes. Also, the vent 73 can be selectively opened and closed. Therefore, even if the installation posture of the light source device 4 is reversed, the temperature of the upper part and the lower part of the light emitting unit 51 can be optimized, and the entire light emitting unit 51 can have a balanced temperature distribution.

  The light source device 4 according to the present embodiment emits light even if the installation posture of the light source device 4 is reversed because the four vent holes 731, 732, 733, and 734 are installed substantially symmetrically with respect to the illumination optical axis OA. The temperature of the upper part and the lower part of the part 51 and the temperature distribution of the light emitting part 51 can be set to substantially the same temperature and temperature distribution. Thereby, variation in temperature and temperature distribution due to a difference in posture of the light source device 4 (desktop installation, ceiling installation) can be suppressed, and stable cooling can be performed.

  The light source device 4 of the present embodiment improves the ease of control of the cooling air A flowing on the inner surface side of the reflector 6, can optimize the temperatures of the upper and lower portions of the light emitting unit 51, and the entire light emitting unit 51. Can be made to have a balanced temperature distribution, and since the light source device 4 that can cope with the reversal of the installation posture is provided, it is possible to extend the service life.

  Since the projector 1 according to the present embodiment includes the light source device 4 capable of extending the life, the optical quality such as the brightness of the projected image can be maintained for a long time. Moreover, since the replacement time of the light source device 4 can be extended, the convenience of the projector 1 can be improved.

The projector 1 according to the present embodiment includes the cooling mechanism 2 (the duct 411, the inflow port 412, the exhaust port 413, the switching plate, and the like), so that even if the installation posture is reversed, the duct 411 located on the upper side causes the inner surface of the reflector 6 to be reversed. Cooling air A is introduced into the side to cool the arc tube 5. Further, by selectively opening and closing the vent 73 by the opening and closing operation of the opening / closing portion 74, the cooling air A that has been warmed by cooling the arc tube 5 is exhausted from the opened vent 73 to the outer surface side of the reflector 6. Can do. In this way, by cooling the arc tube 5 with the cooling mechanism 2 and the light source device 4, as shown in FIG. 8, compared with the vent 231 of the fixing member 230 that has been conventionally used as an auxiliary, as shown in FIG. In this embodiment, it is possible to realize the projector 1 that can be used mainly to perform appropriate temperature control.
(Second Embodiment)

  FIG. 4 is a schematic view showing a light source device 4A according to the second embodiment, FIG. 4 (a) is a perspective view of the fixing member 8, and FIG. 4 (b) is a schematic sectional view of the light source device 4A. It is. FIG. 4B is a view in which the periphery of the fixing member 8 (fixing portions 811 and 813) is cut by a plane that passes through the illumination optical axis OA and is inclined 45 degrees. FIG. 5 is a schematic cross-sectional view of the light source device 4A, FIG. 5A is a view in which the periphery of the fixing member 8 is cut along an XY plane passing through the illumination optical axis OA, and FIG. It is the figure which cut | disconnected the fixing member 8 periphery in the XZ plane which passes along the axis | shaft OA. FIG. 6 is a schematic view of the light source device 4A viewed from the rear. FIG. 6 shows the rotating member 86 in a sectional view for convenience of explanation. The configuration and operation of the light source device 4A will be described with reference to FIGS.

  Compared with the light source device 4 of the first embodiment, the light source device 4A of the present embodiment is different in the configuration of the fixing member 8 from the configuration of the fixing member 7 of the first embodiment, and other configurations are the first embodiment. It becomes the same as the form. In addition, the code | symbol similar to 1st Embodiment is attached to the same structure.

  As shown in FIGS. 4 to 6, the fixing member 8 of the present embodiment is configured to include a base portion 82 that is substantially orthogonal to the illumination optical axis OA. The fixing member 8 includes four fixing portions 81 on the side peripheral surface 82b of the base portion 82. The fixing member 8 includes an opening / closing part 84 described later.

  The base portion 82 substantially corresponds to the end surface portion 72 in the first embodiment, is formed in a substantially disc shape, and has a fixing hole 821 for fixing the sealing portion 52A of the arc tube 5 at the center. . The sealing portion 52A is fixed to the fixing hole 821 through the adhesive 11. Moreover, the base part 82 has the support part 85 formed in the inner surface 82a so that it may protrude in the shape of a ring in the part which entered inside from the side peripheral surface 82b. The support part 85 constitutes an opening / closing part 84 together with a rotating member 86 described later.

  The fixing portion 81 is fixed to the back surface 622 of the reflector 6 via the adhesive 11. Thereby, the fixing member 8 holds the arc tube 5 and is fixed to the reflector 6. The fixing portion 81 is a member that secures a distance between the end surface 612 of the reflector 6 and the base portion 82 of the fixing member 8, and is installed at a predetermined distance. In other words, by securing the distance between the end surface 612 and the base portion 82 by the fixing portion 81, it can be said that a side surface portion extending in a direction substantially parallel to the illumination optical axis OA is configured. The fixing portion 81 is a member that also determines a length in a direction parallel to an illumination optical axis OA of a vent 83 to be described later.

  As shown in FIG. 4, the fixing portion 81 includes a claw portion 81a and a receiving portion 81b. The receiving portion 81 b is a portion that receives the end surface 612 of the neck portion 61 of the reflector 6. Further, the claw portion 81a is formed to protrude toward the back surface 622 of the reflector 6 outside the receiving portion 81b.

  As shown in FIG. 6, four fixing portions 81 are formed so as to protrude in both directions inclined by ± 45 degrees with respect to the XY plane passing through the illumination optical axis OA when viewed from the rear (−X direction). When the four fixing portions 81 are viewed from the rear (−X direction), the fixing portion 81 in the upper right direction is referred to as a fixing portion 811, and the fixing portions 812, 813, and 814 are clockwise from the fixing portion 811.

  The vent 83 of the present embodiment is formed by fixing the fixing member 8 to the reflector 6. Specifically, the vent 83 is formed by a gap between the end surface 612 of the reflector 6 and the support portion 85 of the fixing member 8 when the fixing member 8 is fixed to the reflector 6. Further, the vent 83 communicates the inner surface side and the outer surface side of the reflector 6.

  In the present embodiment, the side surface portion (corresponding to the side surface portion 71 in the first embodiment) extending in a direction substantially parallel to the illumination optical axis OA is not clearly configured, but the entire side surface portion is a vent hole. In other words, it is configured as 83. In that case, it can be said that the vent 83 is installed on the side surface.

  The rotation member 86 is a member that selectively opens and closes the vent 83 by being supported by the support portion 85 and rotating. The rotating member 86 is formed in a substantially cylindrical shape corresponding to the vent 83. The rotation member 86 is installed along the outer periphery of the support portion 85 and is supported by the support portion 85 so as to be rotatable. Further, as shown in FIGS. 5B and 6, the rotating member 86 has a weight 87, and the weight 87 is always on the lower side (−) in response to a change in the installation posture of the light source device 4 </ b> A. The rotation member 86 rotates so as to be in the (Z direction).

  Further, the inner diameter of the rotating member 86 is substantially the same as the diameter of the insertion hole 611 of the reflector 6 as shown in FIG. When the fixing member 8 incorporating the rotating member 86 into the support portion 85 is fixed to the reflector 6, the rotating member 86 selectively selects the vent 83 formed as a gap by fixing the fixing member 8. It will be in a state of blocking.

  Two openings 861 and 862 are formed in the rotating member 86 at predetermined positions. When the turning member 86 is turned by the weight 87, as shown in FIGS. 4A and 6, one opening 861 is located between the fixed portion 813 and the fixed portion 814, and the other opening is provided. 862 is located between the fixed portion 811 and the fixed portion 812. The openings 861 and 862 are formed substantially symmetrically with respect to the illumination optical axis OA. Specifically, the openings 861 and 862 are formed symmetrically with respect to an XY plane passing through the illumination optical axis OA.

  The fixing member 8 constitutes an opening / closing portion 84 that opens and closes the vent 83 by the rotating member 86 and the support portion 85 described above. The opening / closing part 84 opens a region where the openings 861 and 862 of the rotating member 86 overlap with the vent 83 when the rotating member 86 is supported by the support part 85 and rotates. In the present embodiment, the vent 83 is formed over the entire circumference of the fixing member 8, and the region of the vent 83 that overlaps the openings 861 and 862 of the rotating member 86 is opened. The region of the vent 83 that overlaps (region where the openings 861 and 862 are not formed) is closed.

Next, the flow of the cooling air B will be described with reference to FIGS. 4 (b), 5 (a), and 6. FIG.
The cooling mechanism 2 of this embodiment is configured similarly to the cooling mechanism 2 of the first embodiment. The cooling air B that has flowed into the reflector 6 from the upward inflow port 412 flows so as to be blown toward the light emitting unit 51. Then, the cooling air B flows on the outer surface (upper, horizontal, lower, front, rear, etc.) of the light emitting part 51 to take away the heat of the light emitting part 51 that has generated heat, and then flows into the fixing member 8. The air is roughly divided into the wind B1 and the cooling air B2 that flows to the left and right exhaust ports 413 installed in the light source casing 41 after taking the heat of the light emitting part 51 that has generated heat by flowing on the outer surface of the light emitting part 51. To do.

  The cooling air B <b> 1 flows and cools the outer surface of the arc tube 5 (mainly the light emitting portion 51), then flows through the insertion hole 611, and the opening 861 of the rotating member 86 opened by the opening / closing portion 84. The air is exhausted from the air vent 83 to the outer surface side of the fixing member 8 (outer surface side of the reflector 6) through 862. The cooling air B1 is branched into the cooling air B11 and B12 through the two openings 861 and 862, and is discharged in the left-right direction.

  As with the cooling air A2 of the first embodiment, the cooling air B2 flows and cools the outer surface of the arc tube 5 (mainly the light emitting portion 51), and then flows on the reflection surface 621 and the like of the reflector 6 to provide a light source. The air is exhausted from the left and right exhaust ports 413 installed in the housing 41 to the outside of the light source housing 41. The cooling air B2 is branched into the cooling air B21 and B22 via the left and right exhaust ports 413 and exhausted.

  In the above description, as in the first embodiment, the description has been made on the assumption that the projector 1 is installed on a desk. However, the projector 1 is also supported when the projector 1 is inverted (rotated 180 degrees) and suspended from the ceiling. . The operation of the light source device 4A (operation of the opening / closing unit 84) and cooling when the projector 1 is suspended from the ceiling will be briefly described.

  By reversing the projector 1, the housed light source device 4A is also reversed (rotated by 180 degrees). Thereby, the light source device 4A is rotated by the opening / closing portion 84 with the rotation member 86 supported by the support portion 85 so that the weight 87 is on the lower side (−Z direction).

  By this rotation, one opening 861 of the rotation member 86 is positioned between the fixed portion 811 and the fixed portion 812, and the other opening 862 is positioned between the fixed portion 813 and the fixed portion 814. . Since the openings 861 and 862 are formed symmetrically with respect to the XY plane passing through the illumination optical axis OA, even if the light source device 4A is inverted, the same position as before the inversion is opened.

  Note that the cooling air B has the duct 411 positioned on the upper side when the light source device 4A is inverted so that the cooling air B is installed on the desk. When the switching plate operates, the cooling air B flows into the duct 411 located on the upper side, and flows into the reflector 6 from the inlet 412. Further, the cooling air B flowing into the reflector 6 flows on the outer surface of the inverted light emitting portion 51 (light emitting tube 5), and a part thereof is exhausted from the vent 83 through the openings 861 and 862, and the rest The air is exhausted through the left and right exhaust ports 413.

According to the embodiment described above, the following effects can be obtained.
The light source device 4 </ b> A of the present embodiment is configured to include the arc tube 5 and the reflector 6 similar to those of the first embodiment, and the opening / closing unit 84 includes a rotating member 86 and a support unit 85. Further, the rotation member 86 has openings 861 and 862 formed at predetermined positions, and the rotation member 86 is supported by the support portion 85 and rotates with respect to the fixed member 8. By this operation, the region where the openings 861 and 862 of the rotating member 86 overlap with the vent 83 is opened so that the inner surface side and the outer surface side of the reflector 6 communicate with each other, and in regions other than the openings 861 and 862, It is not opened. With this configuration, the light source device 4 </ b> A can improve the controllability of the cooling air B flowing on the inner surface side of the reflector 6. For this reason, it is possible to optimize the temperatures of the upper and lower portions of the light emitting unit 51 and to make the entire light emitting unit 51 have a balanced temperature distribution. Moreover, even if the installation posture of the light source device 4A is reversed, variations in temperature and temperature distribution due to the posture difference can be suppressed, and stable cooling can be performed.

  In the light source device 4A of the present embodiment, the rotating member 86 is formed in a substantially cylindrical shape corresponding to the vent 83 of the fixed member 8, so that the rotating member 86 can be realized with a simple configuration, and the vent 83 can be opened and closed easily.

  The light source device 4 </ b> A of the present embodiment has a weight 87 on the rotating member 86. Therefore, the rotation member 86 is easy to rotate around the support portion 85. Therefore, even if the installation posture of the light source device 4A is reversed, the opening / closing operation of the opening / closing part 84 can be performed smoothly.

  The light source device 4 </ b> A according to the present embodiment performs the opening / closing operation of the vent 83 by the opening / closing portion 84 by installing the two openings 861, 862 substantially symmetrically with respect to the illumination optical axis OA, and thereby the light source device Even if the installation posture of 4A is reversed, the temperature of the upper part and the lower part of the light emitting unit 51 and the temperature distribution of the light emitting unit 51 can be set to substantially the same temperature and temperature distribution. Thereby, variation in temperature and temperature distribution due to the difference in posture of the light source device 4A can be suppressed, and stable cooling can be performed.

  The light source device 4 </ b> A of the present embodiment is cooled only by the openings (the openings 861 and 862 in this embodiment) of the rotating member 86 because the entire side surface of the fixing member 8 is configured as the vent 83. Since the exhaust position and the exhaust amount of the wind B can be adjusted, the degree of freedom of the installation position and size of the vent can be improved, and the controllability of the cooling air B can be improved.

  The light source device 4 </ b> A of the present embodiment can extend the life as in the light source device 4 of the first embodiment.

  According to the projector 1 including the light source device 4A of the present embodiment, the optical quality such as the brightness of the projected image can be maintained for a long period of time as in the projector 1 including the light source device 4 of the first embodiment. Moreover, since the replacement time of the light source device 4A can be extended, the convenience of the projector 1 can be improved.

According to the projector 1 including the light source device 4A of the present embodiment, similarly to the projector 1 including the light source device 4 of the first embodiment, by providing the cooling mechanism 2, even if the installation posture is reversed, Cooling air B is caused to flow from the duct 411 located on the inner surface side of the reflector 6 to cool the arc tube 5. In addition, by selectively opening and closing the vent 83 by the opening and closing operation of the opening and closing portion 84, the cooling air B that has been warmed by cooling the arc tube 5 is sent from the opened vent 83 (opening portions 861 and 862) to the reflector 6. It is possible to exhaust to the outer surface side. Thus, by cooling the arc tube 5 with the cooling mechanism 2 and the light source device 4A, it is possible to realize the projector 1 that can appropriately control the temperature by mainly using the vent 83 as compared with the conventional case. Can do.
(Third embodiment)

  FIG. 7 is a schematic view showing a light source device 4B according to the third embodiment, FIG. 7 (a) is a schematic sectional view of the light source device 4B, and FIG. 7 (b) shows the light source device 4B from the rear. FIG. FIG. 7A is a diagram in which the periphery of the fixing member 9 is cut along an XZ plane passing through the illumination optical axis OA. FIG. 7B is an enlarged view of the fixing member 9. The configuration and operation of the light source device 4B will be described with reference to FIG.

  The light source device 4B of this embodiment is different from the light source device 4 of the first embodiment in the configuration of the fixing member 9 and the configuration of the fixing member 7 of the first embodiment, and the other configurations are the first embodiment. It becomes the same as the form. In addition, the code | symbol similar to 1st Embodiment is attached to the same structure.

  The fixing member 9 of the present embodiment is disposed on the side surface 91 having a cylindrical shape extending in a direction substantially parallel to the illumination optical axis OA, and substantially orthogonal to the illumination optical axis OA and on the opposite side to the light emission direction. And an end surface portion 92 to be configured. The end surface portion 92 is formed in a substantially disc shape, and the side surface portion 91 is formed in a cylindrical shape. The fixing member 9 includes an opening / closing part 94. The opening / closing part 94 includes a rotating member 96 and a support part 95, which will be described later, and performs an opening / closing operation for selectively opening and closing a vent hole 93, which will be described later.

  As shown in FIG. 7A, the fixing member 9 has a fixing hole 921 for fixing the sealing portion 52 </ b> A of the arc tube 5 at the center of the end surface portion 92. The sealing portion 52 </ b> A is fixed to the fixing hole 921 through the adhesive 11. Further, the tip end portion 911 of the side surface portion 91 of the fixing member 9 is fixed to the back surface 622 of the reflector 6 via the adhesive 11. Thereby, the fixing member 9 holds the arc tube 5 and is fixed to the reflector 6.

  The end surface portion 92 has a support portion 95 that is formed outside the fixed hole 921 so as to protrude from the inner surface 92a in a ring shape. The support portion 95 constitutes an opening / closing portion 94 together with a rotating member 96 described later.

  The end surface portion 92 has a vent hole 93 formed on the outer side of the support portion 95 and centered on a concentric circle with the illumination optical axis OA as the center. The ventilation hole 93 is formed with a ventilation hole 931 in the upward direction (+ Z direction) around the illumination optical axis OA, and the ventilation holes 932, 933, 934, and 935 are sequentially arranged at intervals of 45 degrees clockwise from the ventilation hole 931. , 936, 937, 938 are formed. In the present embodiment, a total of eight vent holes 93 are formed. Further, the vent holes 93 (vent holes 931 to 938) are formed symmetrically with respect to the illumination optical axis OA. The eight vent holes 93 allow the inner surface side and the outer surface side of the reflector 6 to communicate with each other.

  The rotation member 96 constituting the opening / closing unit 94 is a member that selectively opens and closes the vent hole 93 by being supported by the support unit 95 and rotating. The rotating member 96 is formed in a substantially plate shape corresponding to the vent hole 93. Specifically, the rotating member 96 is formed in a disc shape with the center removed in plan view.

  The rotation member 96 is installed along the outer periphery of the support part 95, and is supported by the support part 95 so that rotation is possible. Further, as shown in FIG. 7, the rotating member 96 has a weight 97, and the weight 97 is always on the lower side (−Z direction) in response to a change in the installation posture of the light source device 4B. The rotating member 96 is rotated.

  In this embodiment, the rotating member 96 has four openings 961 to 964 that are formed concentrically around the illumination optical axis OA. As shown in FIG. 7B, when the rotation member 96 is supported by the support 95 by the weight 97 and rotated, an opening 961 is formed in the upward direction (+ Z direction) about the illumination optical axis OA. The openings 962, 963, and 964 are sequentially formed from the opening 961 in the clockwise direction at intervals of 90 degrees. The openings 961 to 964 are formed symmetrically with respect to the illumination optical axis OA.

  The distances from the illumination optical axis OA to the respective centers of the openings 961 to 964 are set to be the same as the distances from the illumination optical axis OA to the respective centers of the vent holes 93. Thereby, when the fixing member 9 incorporating the rotating member 96 in the support portion 95 is fixed to the reflector 6, the rotating member 96 is in a state of selectively closing the vent hole 93.

  Then, as shown in FIG. 7, when the rotating member 96 is rotated by the weight 97, in this embodiment, the opening 961 and the vent 931 overlap, the opening 962 and the vent 933 overlap, The opening 963 and the vent 935 overlap, and the opening 964 and the vent 937 overlap. In addition, each hole diameter of the opening parts 961-964 is formed larger than each hole diameter of the vent holes 931-938.

  The opening / closing part 94 performs an opening / closing operation as the opening / closing part 94 by the operation of the rotating member 96 described above with respect to the vent hole 93. The opening / closing part 94 opens a region where the openings 961 to 964 and the vents 931 to 938 overlap. Therefore, in the present embodiment, the opening / closing part 94 opens four holes 931, 933, 935, and 937. In addition, the opening / closing part 94 closes the vent hole 93 that overlaps the non-opened area other than the opening parts 961 to 964 of the rotating member 96. Therefore, the opening / closing part 94 closes the vent holes 932, 934, 936, 938 in this embodiment.

Next, the flow of the cooling air C will be described with reference to FIG.
The cooling mechanism not shown in the present embodiment is configured in the same manner as the cooling mechanism 2 of the first embodiment and the second embodiment. The cooling air C that has flowed into the reflector 6 from the upward inlet 412 (see FIG. 6) flows so as to be blown toward the light emitting unit 51 (see FIG. 6). The cooling air C flows on the outer surface (upper, horizontal, lower, front, rear, etc.) of the light emitting unit 51 to take away the heat of the light emitting unit 51 that has generated heat, and then flows into the fixing member 9. The air C1 and the heat of the light emitting part 51 that has generated heat by flowing on the outer surface of the light emitting part 51 are taken away, and then flow to the left and right exhaust ports 413 (see FIG. 6) installed in the light source casing 41 (see FIG. 6). The cooling air C2 (not shown) that flows is roughly divided and flows.

  The cooling air C <b> 1 flows and cools the outer surface of the arc tube 5 (mainly the light emitting portion 51), then flows through the insertion hole 611, and vents 931, 933, 935 and 937 opened by the opening / closing portion 94. The air is exhausted to the outer surface side of the fixing member 9 (the outer surface side of the reflector 6). The cooling air C1 is branched into cooling air C11, C12, C13, and C14 through four vents 931, 933, 935, and 937, and exhausted in the vertical and horizontal directions.

  As with the cooling air A2 of the first embodiment, the cooling air C2 flows and cools the outer surface of the arc tube 5 (mainly the light emitting portion 51), and then flows on the reflecting surface 621 and the like of the reflector 6 for light source. The air is exhausted from the left and right exhaust ports 413 (see FIG. 6) installed in the housing 41 to the outside of the light source housing 41. The cooling air C2 is branched and exhausted via the left and right exhaust ports 413.

  In the above description, as in the first embodiment, the description has been made on the assumption that the projector 1 is installed on a desk. However, the projector 1 is also supported when the projector 1 is inverted (rotated 180 degrees) and suspended from the ceiling. . The operation of the light source device 4B (operation of the opening / closing unit 94) and cooling when the projector 1 is suspended from the ceiling will be briefly described.

  By reversing the projector 1, the housed light source device 4B is also reversed (rotated 180 degrees). In the light source device 4B, in response to the reversal of the installation posture, the rotation member 96 is supported by the support unit 95 and is rotated by the opening / closing unit 94 so that the weight 97 is on the lower side (−Z direction).

  By this rotation, the opening 961 overlaps with the vent 935, the opening 962 overlaps with the vent 937, the opening 963 overlaps with the vent 931, and the opening 964 overlaps with the vent 933. As a result, the vents 931, 933, 935, and 937 are opened, and the vents 932, 934, 936, and 938 are closed. In the present embodiment, even if the light source device 4B is inverted, the same vents 931, 933, 935, and 937 are opened as a result, and the same vents 932, 934, 936, and 938 are blocked. Will be in a state.

  Note that the cooling air C has the duct 411 positioned on the upper side when the light source device 4B is inverted so that the cooling air C is installed on the desk. When the switching plate operates, the cooling air C flows into the duct 411 located on the upper side, and flows into the reflector 6 from the inlet 412. Further, the cooling air C flowing into the reflector 6 flows on the outer surface of the inverted light emitting portion 51 (light emitting tube 5), and part of the air is exhausted through the vents 931, 933, 935, and 937, and the rest The air is exhausted through the left and right exhaust ports 413.

According to the embodiment described above, the following effects can be obtained.
The light source device 4B of the present embodiment is configured to include the arc tube 5 and the reflector 6 similar to those of the first embodiment, and the opening / closing portion 94 includes a rotating member 96 and a support portion 95. In addition, the rotation member 96 has openings 961, 962, 963, and 964 formed at predetermined positions, and the rotation member 96 is supported by the support portion 95 and rotates with respect to the fixed member 9. By this operation, the regions where the openings 961, 962, 963, and 964 of the rotating member 96 overlap with the vents 93 are opened so that the inner surface side and the outer surface side of the reflector 6 communicate with each other. , 963, 964 are not opened. With this configuration, the light source device 4B can improve the controllability of the cooling air C flowing on the inner surface side of the reflector 6. For this reason, it is possible to optimize the temperatures of the upper and lower portions of the light emitting unit 51 and to make the entire light emitting unit 51 have a balanced temperature distribution. Even if the installation posture of the light source device 4B is reversed, variations in temperature and temperature distribution due to the posture difference can be suppressed, and stable cooling can be performed.

  In the light source device 4B of the present embodiment, the rotation member 96 is formed in a substantially plate shape corresponding to the vent hole 93 of the fixed member 9, so that the rotation member 96 can be realized with a simple configuration, and the vent hole 93 can be easily opened and closed.

  The light source device 4 </ b> B of the present embodiment has a weight 97 on the rotating member 96. Therefore, the rotation member 96 is easy to rotate around the support portion 95. Therefore, even when the installation posture of the light source device 4B is reversed, the opening / closing operation of the opening / closing part 94 can be performed smoothly.

  In the light source device 4B of the present embodiment, the vent 93 is installed substantially symmetrically with respect to the illumination optical axis OA, and the openings 961 to 964 are installed substantially symmetrically with respect to the illumination optical axis OA. By performing the opening / closing operation of the air vent 93 by 94, even if the installation posture of the light source device 4B is reversed, the temperatures of the upper and lower portions of the light emitting unit 51 and the temperature distribution of the light emitting unit 51 are substantially the same. Distribution. Thereby, variations in temperature and temperature distribution due to the attitude difference of the light source device 4B can be suppressed, and stable cooling can be performed.

  The light source device 4 </ b> B of the present embodiment can extend the life as in the light source device 4 of the first embodiment.

  According to the projector 1 including the light source device 4B of the present embodiment, the optical quality such as the brightness of the projected image can be maintained for a long period of time as in the projector 1 including the light source device 4 of the first embodiment. Moreover, since the replacement time of the light source device 4B can be extended, the convenience of the projector 1 can be improved.

  According to the projector 1 including the light source device 4B of the present embodiment, as with the projector 1 including the light source device 4 of the first embodiment, by providing the cooling mechanism 2, even if the installation posture is reversed, Cooling air C is caused to flow from the duct 411 positioned on the inner surface side of the reflector 6 to cool the arc tube 5. In addition, by selectively opening and closing the vent hole 93 by the opening and closing operation of the opening / closing portion 94, the cooling air C that has been warmed by cooling the arc tube 5 is supplied to the vent hole 93 (the vent holes 931, 933, 935, and 937). ) To the outer surface side of the reflector 6. In this way, by cooling the arc tube 5 with the cooling mechanism 2 and the light source device 4B, it is possible to realize the projector 1 that can appropriately control the temperature by mainly using the vent hole 93 as compared with the conventional case. Can do.

  Note that the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made without departing from the scope of the invention. A modification will be described below.

  In the light source device 4 of the first embodiment, the air vent 73 of the fixing member 7 is formed in the vertical direction (± Z direction) and the horizontal direction (± Y direction) of the side portion 71. However, the present invention is not limited to this, and vents may be formed in other directions, and an opening / closing part may be installed corresponding to the vents. Thereby, also when the installation attitude | position of the light source device 4 becomes an installation attitude | position other than inversion, the ease of control of cooling air can be improved. For example, by forming a vent hole in the direction of ± 45 degrees and installing an opening / closing part corresponding to the vent hole, the installation posture of the light source device 4 is not only reversed but also horizontally (90 degrees rotation). It can be made to correspond to the case.

  In the light source device 4A according to the second embodiment, the rotating member 86 is provided with the weight 87, but the weight 87 may not be provided. In that case, it is possible to rotate using the deviation of the center of gravity (deviation of the center of gravity position) by moving the positions of the openings 861 and 862 formed in the rotation member 86 and installing them. Similarly, the weight 97 may not be installed on the rotating member 96 in the light source device 4B of the third embodiment. Also in this case, it is possible to rotate using the bias of the center of gravity by moving the positions of the openings 961 to 964 formed in the rotating member 96.

  In the light source device 4A of the second embodiment, as the installation posture of the light source device 4A, the case of desktop installation and the case of ceiling installation in which the installation posture is reversed (rotated 180 degrees) are described. Can be accommodated in the case of horizontal installation (rotation by 90 degrees) or other installation postures, and the ease of control of the cooling air can be improved.

  In the light source device 4A of the second embodiment, the opening 861 of the fixing member 8 (the rotation member 86) is located between the fixing portion 813 and the fixing portion 814, and the opening 862 is the fixing portion 811 and the fixing portion. 812. However, the opening can be installed at any position including the size. Further, the number of openings is not limited to two, and may be one or three or more. Thereby, also when the installation attitude | position of 4 A of light sources becomes installation attitudes other than inversion, the ease of control of cooling air can be improved.

  In the light source device 4 </ b> A of the second embodiment, the vent 83 of the fixing member 8 (rotating member 86) is formed by a gap between the end surface 612 of the reflector 6 and the support portion 85 of the fixing member 8. The vent 83 is formed over the entire circumference. However, the vent may be configured such that a side surface portion is formed in substantially the same manner as the side surface portion 91 of the third embodiment, and one or a plurality of vent holes are formed on the side surface portion. With this configuration, the vent may be selectively opened by overlapping the opening of the rotating member.

  In the light source device 4B of the third embodiment, the openings 961 to 964 of the fixing member 9 (the rotation member 96) are illuminated when the rotation member 96 is supported by the support 95 by the weight 97 and rotated. An opening 961 is formed in the upward direction (+ Z direction) around the axis OA, and openings 962, 963, and 964 are sequentially formed from the opening 961 at intervals of 90 degrees. However, the present invention is not limited to this, and the opening can be installed at any position including the size. Further, the number of openings is not limited to four. Thereby, also when the installation attitude | position of the light source device 4B turns into an installation attitude | position other than inversion, the ease of control of a cooling wind can be improved. For example, the openings may be formed in directions of ± 45 degrees around the illumination optical axis OA. In this case, it is possible to cope with not only the installation posture of the light source device 4B but also the horizontal installation (rotation of 90 degrees).

  In the light source device 4B of the third embodiment, the vents 931 to 938 of the fixing member 9 are formed with vents 931 upward (+ Z direction) around the illumination optical axis OA, and clockwise from the vent 931. In addition, vent holes 93 are formed in order at intervals of 45 degrees. However, the present invention is not limited to this, and the vent can be installed at any position including the size. Also, the number of vents is not limited to eight.

  Although the vent 73 of the first embodiment is installed symmetrically with respect to the illumination optical axis OA, it may not be symmetrical. The same applies to the openings 861 and 862 of the second embodiment, the vent 93 and the openings 961 to 964 of the third embodiment.

  The projector 1 according to the first, second, and third embodiments employs a so-called three-plate method that uses three liquid crystal panels 342 corresponding to R light, G light, and B light. However, the present invention is not limited to this, and a single-plate liquid crystal panel may be adopted. Further, a liquid crystal panel for improving the contrast may be additionally employed.

  The light source devices 4, 4 </ b> A, 4 </ b> B according to the first, second, and third embodiments include a reflector 6 having a reflective surface 621 having a substantially elliptical cross section. However, the present invention is not limited to this, and a reflector having a reflecting surface with a substantially parabolic cross section may be provided. When such a reflector is provided, the collimating lens 310 can be omitted.

  The light source devices 4, 4 </ b> A, 4 </ b> B of the first, second, and third embodiments employ an ultrahigh pressure mercury lamp, but are not limited to this, and employ various discharge lamps that emit light with high brightness. For example, a metal halide lamp, a high-pressure mercury lamp, or the like can be employed.

  In the first, second, and third embodiments, the light modulation device uses the transmissive liquid crystal panel 342. However, it is also possible to use a reflection light modulation device such as a reflection liquid crystal panel. . In general, any light modulation device that modulates an incident light beam based on image information may be used. For example, a light modulation device of another type such as a micromirror light modulation device may be employed. For example, a DMD (Digital Micromirror Device) can be adopted as the micromirror type light modulation device.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Cooling mechanism, 4, 4A, 4B ... Light source device, 5 ... Light emission tube, 6 ... Reflector, 7, 8, 9 ... Fixing member, 51 ... Light emission part, 52A, 52B ... Sealing part, 71 ... Side part 72 ... End face part 73 ... Venting hole 74 ... Opening / closing part 75 ... Support shaft 76 ... Opening / closing lid 81 ... Fixing part 82 ... Base part 83 ... Venting hole 84 ... Opening / closing part 85 DESCRIPTION OF SYMBOLS ... Support part, 86 ... Turning member, 87 ... Weight, 91 ... Side face part, 92 ... End face part, 93 ... Vent, 94 ... Opening / closing part, 95 ... Supporting part, 96 ... Turning member, 97 ... Weight, 342 Liquid crystal panel, 411, Duct, 611, Insertion hole, 621, Reflecting surface, 731 to 734, Vent, 751 to 754, Support shaft, 761 to 764, Open / close lid, 861, 862, Opening, 931 to 938 Vents, 961-964 ... openings.

Claims (12)

An arc tube having a light emitting part for emitting a light beam and a pair of sealing parts extending on both sides of the light emitting part;
A reflector having a reflection surface that reflects the light beam on the inner surface side, and one of the sealing portions is inserted from the inner surface side, and a reflector,
A fixing member that covers the insertion hole, is fixed to the reflector, fixes the one sealing portion inserted through the insertion hole, and has a vent hole that connects the inner surface side and the outer surface side of the reflector; ,
A light source device comprising: an opening / closing portion that performs an opening / closing operation of the vent. The light source device according to claim 1,
The opening / closing part includes an opening / closing member that opens and closes the vent, and a support shaft that rotatably supports the opening / closing member on the fixing member,
The light source device according to claim 1, wherein the opening / closing part performs the opening / closing operation by rotating around the support shaft by the weight of the opening / closing member. The light source device according to claim 2,
A plurality of the vents are installed on a side surface portion of the fixing member extending in a direction substantially parallel to the optical axis,
The light source device, wherein the opening / closing part is installed corresponding to the plurality of vent holes. The light source device according to claim 3,
The light source device, wherein the plurality of vent holes are installed substantially symmetrically with respect to the optical axis. The light source device according to claim 1,
The opening / closing part includes a rotating member having an opening formed at a predetermined position, and a support part that rotatably supports the rotating member on the fixing member,
The light source device according to claim 1, wherein the opening / closing part performs the opening / closing operation of opening an area where the opening part and the vent hole overlap when the rotating member rotates. The light source device according to claim 5,
The vent is installed on a side surface of the fixing member extending in a direction substantially parallel to the optical axis,
The light source device, wherein the rotating member is formed in a substantially cylindrical shape corresponding to the vent. The light source device according to claim 5,
The vent is installed at an end surface portion of the fixing member substantially orthogonal to the optical axis,
The light source device, wherein the rotating member is formed in a substantially plate shape corresponding to the vent. The light source device according to any one of claims 5 to 7,
The light source device, wherein the rotation member has a weight and is rotated by the weight. The light source device according to any one of claims 5 to 8,
A plurality of the openings are formed. The light source device according to claim 9,
The light source device, wherein the plurality of openings are formed substantially symmetrically with respect to an optical axis. The light source device according to any one of claims 1 to 10,
A light modulation device that modulates the light beam emitted from the light source device according to image information;
A projector comprising: The projector according to claim 11,
One duct that is installed on the upper side and the lower side of the reflector and allows cooling air to flow into the inner surface side of the reflector, and corresponds to the installation posture of the light source device, and is one of the ducts that is the upper side of the reflector A projector having a cooling mechanism for allowing the cooling air to flow in.

Images