JP2014132583A - Light source device and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device and a projector capable of suitably cooling an arc tube.SOLUTION: A light source device 5 includes: an arc tube 51 including a light emitting section 511 and a first sealing section 512; a first reflection mirror 52 having an approximate concave surfaced reflection plane 5221; and a housing body 6 storing these. The housing body 6 includes a duct section 7 positioned above the arc tube 51, extending along a central axis of an optical flux reflected by the reflection plane 5221 and circulating cooled air toward an opposite direction to an advancing direction of the reflected light by the reflection plane 5221. The duct section 7 has: a first aperture section 6134 positioned more on a leading tip side in the advancing direction than an aperture end of the first reflection mirror 52; a wall section 6135 becoming an end edge of the duct section 7 by forming an end edge on a base end side in the advancing direction in the first aperture section 6134; and an inclined section 6132 having cooled air incline toward a surface on the opposite side as the surface where the first aperture section 6134 is formed.

Description

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

2. Description of the Related Art Conventionally, a light source device and a projector that modulates light emitted from the light source device to form image light according to image information and enlarges and projects the image light on a projection surface such as a screen are known. . Such a light source device is often configured to include a discharge arc tube such as an ultra-high pressure mercury lamp and a reflecting mirror that reflects light emitted from the arc tube. Sometimes it becomes hot.
Specifically, an arc tube used for a projector has a light emitting part having a substantially spherical shape and a pair of sealing parts extending in directions away from both ends of the light emitting part. Is filled with a luminescent substance such as mercury. When such an arc tube is turned on, the upper part of the light emitting part has the highest temperature and the lower part has the lowest temperature. When such a high temperature state at the upper part of the light emitting part continues, devitrification is likely to occur, whereas when the temperature difference between the upper part and the lower part becomes large, blackening is likely to occur and the arc tube tends to deteriorate. For this reason, it is necessary to cool the upper part of the arc tube efficiently.

  By the way, such a projector is used in, for example, a normal position placed on a setting surface such as a desk and a ceiling position fixed to a ceiling or the like so that the normal position is upside down. However, the position where hot air stays inside the projector differs between the normal position and the ceiling position. For this reason, when the flow path of the cooling air for cooling the configuration in the projector is set in advance, there is a problem that the light source device cannot be cooled appropriately in either the normal position or the ceiling position. In order to solve such problems, a light source device is known in which a wind direction changing plate that rotates by its own weight is provided, and the air direction changing plate is used to blow cooling air to the upper part of the light emitting unit in either a normal position or a suspended position. (For example, refer to Patent Document 1).

JP 2002-189247 A (FIG. 8)

  However, in the light source device described in Patent Document 1, the cooling air that cools the light-emitting portion is circulated in the duct, and then the flow direction is changed to a gentle downward direction by the air direction change plate, and the air is changed through the air inlet and the air vent. Then, it is introduced into the reflector (reflector). For this reason, there is a problem in that the cooling air cannot be blown at an angle with respect to the arc tube, and the cooling air cannot be appropriately blown to the upper portion of the arc tube.

  An object of the present invention is to provide a light source device and a projector capable of appropriately cooling an arc tube.

  In order to achieve the above-described object, the light source device of the present invention includes a light emitting unit that emits light, a light emitting tube including a first sealing unit that extends from one end of the light emitting unit, and the first sealing. A first reflecting mirror having a substantially concave curved reflecting surface that is attached to a part and reflects light emitted from the light emitting part, and a storage body that houses the arc tube and the first reflecting mirror, The storage body is located above the arc tube, extends along the central axis of the light beam reflected by the reflecting surface, and the cooling air is in a direction opposite to the traveling direction of the light reflected by the reflecting surface. A duct portion that circulates toward the arc tube, the duct portion opening toward the arc tube, and a first opening portion that is positioned on the front end side in the traveling direction from the opening end of the first reflecting mirror; Forming an edge of the opening direction base end side in the opening, An end wall portion and an end edge of the first opening in the vicinity of the leading edge of the traveling direction, and the cooling air is directed toward a surface opposite to the surface on which the first opening is formed. It has an inclined part to be inclined, and a metal plate-like body that is provided on the surface on the opposite side and receives light through the first opening.

According to the present invention, the cooling air flowing in the duct portion is inclined toward the surface opposite to the surface on which the first opening is formed by the inclined portion provided in the vicinity of the first opening. . For this reason, when the said cooling air passes through the 1st opening part opened toward the arc_tube | light_emitting_tube, the angle changes with respect to the distribution direction in a duct part by the said surface and wall part on the opposite side, and distribute | circulates. By positioning the light emitting unit on the flow direction of the cooling air, the cooling air that has circulated through the duct portion can be blown linearly to the light emitting unit.
Moreover, since the duct part is located above the arc tube, the cooling air that has circulated through the duct part is blown to the upper part of the light emitting part. According to this, the upper part of the light emitting part can be positively cooled by the cooling air, and the temperature difference between the upper part and the lower part can be reduced, so that the deterioration of the arc tube can be suppressed.
Therefore, the upper part of the arc tube can be appropriately cooled, and the life of the arc tube can be extended.

In the present invention, the duct part includes a first duct part and a second duct part which are arranged so as to face each other with the arc tube as a center, and each have the first opening part, the wall part and the inclined part. The plate-like body is preferably provided on each of the opposite surface of the first duct portion and the opposite surface of the second duct portion.
In this invention, the said duct part moves with dead weight, and the rectification | straightening member which distribute | circulates the said cooling air toward the duct part located above the said arc_tube | light_emitting_tube among the said 1st duct part and the said 2nd duct part. It is preferable to provide.
According to the present invention, even when the storage body is turned upside down, the rectifying member that moves due to its own weight causes the cooling air to flow into the duct portion located above the arc tube among the first duct portion and the second duct portion. Since it can be made to distribute | circulate, as above-mentioned, cooling air can be directly blown on the light emission part upper part. Therefore, even when the storage body is arranged so that one of the first duct portion and the second duct portion is positioned above the arc tube, the arc tube can be appropriately cooled.

In the present invention, it is preferable that the opening end of the first reflecting mirror is in contact with the end surface of the wall portion on the base end side in the traveling direction.
According to the present invention, the first opening and the opening end of the first reflecting mirror are close to each other. According to this, compared with the case where each is mutually spaced apart, cooling air can be ventilated to light emission part upper part linearly at a short distance. Therefore, the cooling air can be reliably blown to the upper part of the arc tube.

In the present invention, the arc tube includes a second sealing portion extending from an end of the light emitting portion opposite to the first sealing portion, and the duct portion circulates in the duct portion. It is preferable to include a branch portion having a second opening that branches a part of the cooling air and guides the air to the second sealing portion.
According to the present invention, the cooling air flowing through the first opening can cool the first sealing portion side of the arc tube, and the cooling air flowing through the second opening can The second sealing portion side of the arc tube can be cooled. Therefore, since the whole arc tube can be cooled, the lifetime of the arc tube can be further extended.

In this invention, it is preferable that the said arc tube is provided with the 2nd reflective mirror which covers the said traveling direction front end side in the said light emission part, and reflects the incident light toward the said 1st reflective mirror.
According to the present invention, a part of light emitted from the light emitting unit and not directly incident on the first reflecting mirror can be reflected by the second reflecting mirror and incident on the first reflecting mirror. Therefore, the utilization efficiency of the light emitted from the light emitting unit can be improved.
Even when the light emitting part is covered with such a second reflecting mirror, the cooling air flowing through the first opening part falls linearly as described above, so avoid the second reflecting mirror. The cooling air can be blown to the upper part of the light emitting unit. Therefore, even when the second reflecting mirror is provided, the upper portion of the light emitting unit can be appropriately cooled.

According to another aspect of the invention, a projector includes the light source device described above, a light modulation device that modulates light emitted from the light source device to form image light, and a projection optical device that projects the image light. Features.
According to the present invention, it is possible to achieve the same effects as those of the light source device described above, and it is possible to extend the life of the arc tube, and thus the light source device, so that it is not necessary to frequently replace the light source device. This saves maintenance work.

1 is a schematic diagram illustrating a configuration of a projector according to an embodiment of the invention. Sectional drawing which shows the light source lamp in the said embodiment. The perspective view which shows the light source device in the said embodiment. The perspective view which shows the light source device in the said embodiment. The perspective view which shows the light source device in the said embodiment. The perspective view which shows the storage body main body in the said embodiment. The perspective view which shows the duct member in the said embodiment. The perspective view which shows the flow path of the cooling air which cools the light source device in the said embodiment. The perspective view which shows the flow path of the cooling air which cools the light source device in the said embodiment. Sectional drawing which shows the flow path of the cooling air which cools the light source device in the said embodiment. Sectional drawing which shows the light source device as a comparative example with respect to the said embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a schematic diagram illustrating a configuration of a projector 1 according to the present embodiment.
The projector 1 modulates the light beam emitted from the light source device, forms image light according to image information, and enlarges and projects the image light on a projection surface (not shown) such as a screen. As shown in FIG. 1, the projector 1 includes an exterior housing 2 having a substantially rectangular shape in plan view that constitutes an exterior, and an apparatus main body 3 that is housed and disposed in the exterior housing 2.
Among these, the exterior casing 2 forms a top surface (not shown), a front surface 2B, a back surface 2C, a left side surface 2D, a right side surface 2E, and a bottom surface (not illustrated) of the projector 1, and the illustration is omitted on the bottom surface. However, a plurality of legs are provided. By arranging these legs so that they contact the installation surface, the projector 1 is placed in a normal orientation, and the projector 1 is attached with the bottom facing the ceiling or the like upside down from the normal orientation. The projector 1 is in a ceiling suspension position.

The apparatus main body 3 includes an optical unit 4 and a cooling device 9. Although not shown, the apparatus body 3 includes a power supply device that supplies power to each component of the projector 1, a control device that controls the operation of each component of the projector 1, and the like.
Among these, the cooling device 9 includes a plurality of fans 91 to 94, and blows air introduced from the outside of the exterior housing 2 to the optical unit 4, the power supply device, and the control device to cool these devices. Among these fans 91 to 94, a pair of fans 91 and 92 arranged so as to sandwich a projection optical device 45 to be described later is composed of a sirocco fan, and is from an intake port (not shown) formed in the exterior housing 2. External cooling air is introduced and the cooling air is blown to an optical device 44 described later.

  Of the fans 93 and 94 disposed in the vicinity of the light source device 5 described later, the fan 93 located on the rear surface 2C side of the projector 1 is formed of a sirocco fan, and sucks air in the outer casing 2 to provide a light source. The device 5 is blown. The fan 94 is constituted by an axial fan, sucks air that has cooled the light source device 5 and discharges it toward the front surface 2B of the projector 1, and then exhausts the air through an exhaust port 2B1 formed on the front surface 2B. Through the outer casing 2. The fan 93 may be an axial fan, and the fan 94 may be a sirocco fan. Further, the exhaust port 2B1 may be formed on any surface of the exterior housing 2.

[Configuration of optical unit]
The optical unit 4 forms image light according to image information under the control of the above-described control device. The optical unit 4 includes a light source device 5, an illumination optical device 41, a color separation optical device 42, a relay optical device 43, an optical device 44, a projection optical device 45, an optical component casing 46, and a light source storage member 47. .

FIG. 2 is a cross-sectional view showing the light source lamp 50.
The light source device 5 includes a light source lamp 50 having an arc tube 51 made of quartz glass, a main reflecting mirror 52 attached to the arc tube 51, and a parallelizing concave lens 53, and accommodates these inside. And a storage body 6. The configuration of the storage body 6 will be described in detail later.
As shown in FIG. 2, the arc tube 51 has a light emitting part 511 that swells in a substantially spherical shape, and a pair of sealing parts 512 that sandwich the light emitting part 511 and extend away from both ends of the light emitting part 511. 513 (the sealing part on the main reflecting mirror 52 side in FIG. 2 is 512, and the sealing part on the opposite side to the main reflecting mirror 52 side is 513). Among these, the sealing portion 512 corresponds to the first sealing portion of the present invention, and the sealing portion 513 corresponds to the second sealing portion of the present invention.

Inside the light emitting portion 511, a pair of electrodes E (E1, E2) formed of tungsten is disposed, and a light emitting substance containing mercury, a rare gas, and a small amount of halogen is interposed between the pair of electrodes E1, E2. An enclosed discharge space S is formed.
Molybdenum metal foils 5121 and 5131 electrically connected to the electrodes E1 and E2 are inserted into the pair of sealing portions 512 and 513, respectively, and the light emitting portion 511 in the pair of sealing portions 512 and 513 is inserted. The end on the opposite side is sealed with a glass material or the like. Electrode lead lines 514 and 515 extending to the outside of the arc tube 51 are connected to the metal foils 5121 and 5131, respectively. When a voltage is applied to the electrode lead lines 514 and 515, the inside of the light emitting unit 511 Emits light.

A sub-reflecting mirror 54 as a second reflecting mirror that reflects light emitted from the light emitting unit 511 to the sealing unit 513 side to the main reflecting mirror 52 side is fixed to the arc tube 51. The sub-reflecting mirror 54 includes a substantially cylindrical neck portion 541 having an opening 5411 through which the sealing portion 513 is inserted, and a reflecting portion 542 extending from the neck portion 541.
The reflection part 542 is disposed so as to cover the sealing part 513 side of the light emitting part 511, and is formed in a substantially concave shape in sectional view so as to follow the outer shape of the light emitting part 511 on the sealing part 513 side. A reflective surface 5421 is formed on a surface of the reflective portion 542 facing the light emitting portion 511, and the reflective surface 5421 is formed as a cold mirror that reflects visible light and transmits infrared rays and ultraviolet rays. .

  The main reflecting mirror 52 corresponds to the first reflecting mirror of the present invention, and is an integrally molded product made of glass that reflects incident light and converges it to a focal position on the illumination optical axis A. The main reflecting mirror 52 is fixed to the sealing portion 512 with an adhesive B. The main reflecting mirror 52 is formed with a substantially cylindrical neck portion 521 having an opening 5211 through which the sealing portion 512 is inserted, and a concave curved reflection portion 522 extending from the neck portion 521. ing.

Among these, a reflection surface 5221 on which a metal thin film is deposited is formed on the surface of the reflection portion 522 facing the light emitting portion 511. The reflecting surface 5221 is formed as a cold mirror that reflects visible light and transmits infrared rays and ultraviolet rays.
In the present embodiment, the main reflecting mirror 52 is composed of an ellipsoidal reflector having a rotational ellipsoid, but may be composed of a parabolic reflector having a rotational paraboloid. In this case, the collimating concave lens 53 can be omitted. Further, the main reflecting mirror 52 may be formed of a free curved reflector.

  Then, by attaching the above-described sub-reflecting mirror 54 to the arc tube 51, the light emitted from the light emitting unit 511 is emitted to the side opposite to the main reflecting mirror 52 side (that is, the sealing unit 513 side). Light enters the reflecting surface 5221 through the reflecting surface 5421. For this reason, the light is reflected and focused by the reflection surface 5221 in the same manner as the light directly incident on the reflection surface 5221 from the light emitting unit 511. Thereby, the light which does not enter into the lens array 411 (refer FIG. 1) located in the back | latter stage of the optical path of the light source device 5 can be reduced.

The trigger wire 55 is a starting auxiliary line for improving the lighting performance of the arc tube 51, and one end is wound around the sealing portion 512 in a coil shape, and the center is the light emitting portion 511, the sub-reflecting mirror 54, and the sealing portion. The other end is arranged along the line 513, and the other end is connected to the electrode lead line 515 through the connection portion 516. One end of a lead wire 517 extending to the outside of the main reflecting mirror 52 is connected to the connection portion 516 through an insertion hole 5222 formed in the vicinity of the edge of the reflection portion 522, and the lead wire 517 The other end is connected to a terminal 56 for applying a voltage to the electrode lead line 515 and the trigger line 53.
By providing such a trigger line 55 and applying a high voltage pulse voltage to the trigger line 55, the lighting performance of the arc tube 51 can be improved.

Returning to FIG. 1, the illumination optical device 41 includes a pair of lens arrays 411 and 412, a polarization conversion element 413, and a superimposing lens 414.
The color separation optical device 42 includes dichroic mirrors 421 and 422 and a reflection mirror 423, and the relay optical device 43 includes an incident side lens 431, a relay lens 433, and reflection mirrors 432 and 434.

The optical device 44 includes a field lens 441 and three liquid crystal panels 442 as light modulators (the liquid crystal panel for red light is 442R, the liquid crystal panel for green light is 442G, and the liquid crystal panel for blue light is 442B). And three incident side polarizing plates 443, a viewing angle compensation plate 444 and an exit side polarizing plate 445, and a cross dichroic prism 446 as a color synthesizing optical device.
The projection optical device 45 is configured as a combined lens in which a plurality of lenses are housed in a cylindrical lens barrel, and enlarges and projects the image light formed by the optical device 44 on the projection surface.

The optical component casing 46 is a box-shaped casing that is formed in a substantially L shape in plan view and accommodates the optical devices 41 to 44 described above. In the optical component casing 46, the optical devices 41 to 44 are arranged and stored at predetermined positions with respect to the illumination optical axis A set inside.
The light source storage member 47 is connected to one end of the optical component casing 46 and stores the light source device 5 therein.

  In such an optical unit 4, the luminous flux emitted from the light source device 5 is made uniform by the color separation optical device 42 after the illuminance in the illumination area is uniformed by the illumination optical device 41. ), G (green), and B (blue). Each of the separated color lights is modulated in accordance with image information by the corresponding liquid crystal panel 442, and image light for each color light is formed. The image light for each color light is synthesized by the cross dichroic prism 446 and enlarged and projected on the projection surface by the projection optical device 45.

[Construction of storage body]
3 to 5 are perspective views showing the light source device 5. Specifically, FIG. 3 and FIG. 4 are perspective views of the light source device 5 viewed from the front end side in the light beam emission direction and from the right side and the left side toward the light source device 5, and FIG. It is the perspective view seen from the end side. In the following drawings and description, when the projector 1 is placed in a normal position on a horizontal plane, the light beam emission direction of the light source device 5 (specifically, a main reflector 52 to be described later) is a direction along the horizontal direction. Is the Z direction, the front end side in the Z direction is the front side, and the base end side is the back side. Of the directions orthogonal to the Z direction, the left direction is the X direction when viewed from the Z direction front end side (front side) along the horizontal direction, and the X direction base end side is the right side surface, the front end side. Is the left side. Further, the upward direction perpendicular to the Z direction and the X direction is defined as the Y direction, and the distal end side in the Y direction is the upper surface side and the proximal end side is the bottom surface side. That is, the directions indicated by X, Y, and Z are orthogonal to each other.

As described above, the light source device 5 is configured as a unit including the light source lamp 50 and the collimating concave lens 53 (both refer to FIG. 1) and the storage body 6 that stores them inside.
Among these, the storage body 6 is formed of a synthetic resin containing a glass filler. As shown in FIGS. 3 to 5, the storage body main body 61, the Z-direction front end side of the storage body main body 61, and X A duct member 62 that covers the direction base end side, a rectifying plate 63 that is provided in the duct member 62 and rotates by its own weight (FIG. 3), and a support member 64 that pivotally supports the rectifying plate 63 (see FIG. 7). And. As will be described later in detail, the branch portion 7A for branching the cooling air introduced from the outside of the light source device 5 by the outer surface of the housing body 61 and the inner surface of the duct member 62, and the projector 1 is placed in a normal orientation and When in the ceiling-suspended posture, the duct portion 7 constituted by the first duct portion 7B and the second duct portion 7C that guide the branched cooling air to the light emitting portion 511 is formed.

[Configuration of the storage body]
FIG. 6 is a perspective view showing the container body 61. In other words, FIG. 6 is a perspective view showing a state in which the duct member 62 is removed from the state shown in FIG.
As shown in FIG. 6, the storage body main body 61 has a cylindrical body shape having a front portion 611, a right side surface portion 612, an upper surface portion 613, a lower surface portion 614, and a left side surface portion 615, and these surface portions 611 to 615 A lamp housing 616 (see FIG. 8) for housing the light source lamp 50 is formed inside. Then, as shown in FIG. 5, the main reflecting mirror 52 to which the arc tube 51 is fixed is housed in the lamp housing portion 616 from the base end side in the Z direction.
Among these, the front portion 611 is formed with a substantially circular opening 6111 through which light emitted from the light source lamp 50 is transmitted, and the parallelizing concave lens 53 is fitted into the opening 6111.

The region on the front end side in the Z direction of the right side surface portion 612 is combined with the duct member 62 to form the branch portion 7A. As shown in FIG. 6, the right side surface portion 612 includes a pair of rotation restricting portions 6121 and 6122 for restricting the rotation of a rectifying plate 63 described later (the rotation restricting portion on the Y-direction base end side is 6121) Side rotation restricting portion 6122) is formed so as to protrude in the out-of-plane direction of the right side surface portion 612. These rotation restricting portions 6121 and 6122 have shapes in which the Z direction proximal end sides are close to each other and the Z direction distal end sides are separated from each other, and are inclined at the same angle with respect to the Z direction.
Further, a slit-shaped opening 6123 along the Y direction is formed so as to be sandwiched between the rotation restricting portions 6121 and 6122. The opening 6123 corresponds to the second opening of the present invention, and is formed so as to penetrate the right side surface 612. Therefore, a part of the cooling air introduced into the duct member 62 is introduced into the lamp housing 616 (see FIG. 8), and the sealing portion 513 of the arc tube 51 housed in the lamp housing 616. Cool side.

  Further, a pair of bosses 6124 and 6125 projecting in the out-of-plane direction project from the Z-direction base end side of the right side surface portion 612. Among these, the boss 6124 on the base end side in the Y direction is a positioning portion for positioning the duct member 62, and the boss 6125 on the tip end side in the Y direction is fixed to which a screw for fixing the duct member 62 is screwed. Part.

  A region on the front end side in the Z direction of the upper surface portion 613 is combined with the duct member 62 to form the first duct portion 7B. In this region, a step portion 6131 lower than the approximate center of the upper surface portion 613 is formed on the base end side in the X direction. Further, in this region, an inclined portion 6132 that is inclined toward the tip end side in the Y direction as it goes toward the base end side in the Z direction is formed substantially at the center in the X direction. A curved portion 61321 is formed at the end of the inclined portion 6132 on the base end side in the Z direction so as to bend toward the tip end side in the Y direction toward the base end side in the Z direction.

  Further, an upright portion 6133 that rises in the out-of-plane direction from the upper surface portion 613 is formed on the distal end side in the X direction of the inclined portion 6132, and a substantially rectangular shape as a first opening portion is formed on the proximal end side in the Z direction of the inclined portion 6132. The opening 6134 is formed. Further, a wall portion 6135 is formed along the X direction and the Y direction on the base end side in the Z direction of the opening 6134. Among these, the Z direction front end side and the base end side of the opening 6134 and the end edge on the X direction front end side are formed by an inclined portion 6132, an upright portion 6133, and a wall portion 6135.

Further, an upright portion 6136 that rises along the Z direction and toward the front end side in the Y direction is formed on the front end side in the X direction of the upright portion 6133. The upright portion 6136 is an upright portion of the duct member 62 described later. 6243 abuts.
Further, a pair of openings 6137 arranged along the X direction are formed on the base end side of the wall 6135 in the Z direction, and the outer periphery of the main reflecting mirror 52 is cooled through the openings 6137. Cooling air is introduced.

  Note that also on the lower surface portion 614 opposite to the upper surface portion 613, the step portion 6131, the inclined portion 6132, the standing portion 6133, the opening portion 6134, the step portion 6141 similar to the wall portion 6135, the inclined portion 6142, the rising portion 6143, An opening 6144 and a wall 6145 (see FIG. 8) are formed. When the housing body 61 and the duct member 62 are combined, the second duct portion 7C is formed by these.

As shown in FIG. 4, a substantially rectangular opening 6151 for discharging cooling air that has cooled the light source lamp 50 in the lamp housing 616 is formed in the left side surface 615 on the front end side in the Z direction. The formation position of the opening 6151 is located on the tip side in the Z direction from the main reflecting mirror 52. Then, a frame body 6152 with a mesh attached thereto is attached in the opening 6151, and when the arc tube 51 is damaged, the frame body 6152 prevents the fragments of the arc tube 51 from scattering.
In addition, a connector housing portion 6153 that is recessed inward is formed on the proximal side in the Z direction of the left side surface portion 615, and the connector CN connected to the terminal 56 and the electrode lead wire 514 is provided in the connector housing portion 6153. It is attached.

[Configuration of duct member]
FIG. 7 is a perspective view showing the duct member 62.
The duct member 62 is attached to the storage body main body 61 with screws or the like, and the above-described duct is formed by the right side surface portion 612, the upper surface portion 613 and the lower surface portion 614 (see FIG. 6) of the storage body main body 61 and the inner surface of the duct member 62. Part 7 is formed. As shown in FIG. 7, the duct member 62 is formed in a substantially inverted C shape with the X direction distal end opened as viewed from the Z direction proximal end. Such a duct member 62 includes a front surface portion 621, a back surface portion 622, a right side surface portion 623, a top surface portion 624, and a bottom surface portion 625. When the duct member 62 is attached to the storage body main body 61, the right side surface portion 623, the top surface portion 624, and the bottom surface portion 625 oppose the right side surface portion 612, the upper surface portion 613, and the lower surface portion 614, respectively.

The front part 621 has a notch 6221 corresponding to the outer shape of each of the surface parts 612, 613, 614, whereby the front part 621 and the front part 611 are flush with each other.
A substantially rectangular inlet 6212 having a longitudinal direction in the Y direction is formed on the base end side in the X direction of the front portion 621. The introduction port 6212 is connected to the discharge port of the cooling fan 93 (see FIG. 1), and introduces the cooling air discharged from the cooling fan 93 into the duct member 62. Inside the introduction port 6212, a frame body 6213 with a mesh attached is fitted, and the fragments of the arc tube 51 are prevented from scattering like the above-described frame body 6152.
Furthermore, on the surface of the front portion 621 on the Z direction base end side, a protruding portion 6214 protruding in the out-of-plane direction from the Y direction base end side and the tip end edge of the introduction port 6212 is formed. One end of these protrusions 6214 comes into contact with the end of the rectifying plate 63 rotated by its own weight.

The back surface portion 622 faces the front surface portion 621 outside the housing body main body 61, and when the duct member 62 is attached to the housing body main body 61, together with the front surface portion 621 and the right side surface portion 623, the branch portion 7A and each Part of the duct portions 7B and 7C is configured.
A concave portion 6211 to which a support member 64 that pivotally supports the rectifying plate 63 is attached is formed at the end edge of the rear surface portion 622 on the X direction front end side.

  On the inner surface of the right side surface portion 623 (surface on the tip side in the X direction), a pair of rotation restricting portions 6231 and 6232 (Y direction) having the same shape at positions corresponding to the pair of rotation restricting portions 6121 and 6122 described above. The proximal end side rotation restricting portion is 6231 and the distal end side rotation restricting portion is 6232). Further, a substantially circular recess 6233 is formed at a position between the rotation restricting parts 6231 and 6232 and closest to the turn restricting parts 6231 and 6232. An extending portion 632 serving as a rotation axis of the plate 63 is inserted. Further, a screw hole (not shown) into which a screw 65 for fixing the support member 64 is screwed is formed on the inner side of the right side surface portion 623 in the Z direction.

  The top surface part 624 covers the step part 6131, the inclined part 6132, the standing part 6133, the opening part 6134 and the wall part 6135 formed on the upper surface part 613. At this time, the surface on the Y direction base end side of the top surface portion 624, the edge on the Y direction front end side of the upright portion 6133, and the edge on the Z direction front end side of the wall portion 6135 are in contact with each other. The first duct portion 7 </ b> B is formed inside the surface portion 624, the upper surface portion 613, the front surface portion 621, and the back surface portion 622.

  The top surface portion 624 is formed with a protruding portion 6241 that protrudes toward the Y-direction front end side, and the main reflecting mirror 52 housed in the lamp housing portion 616 through the opening 6137 is formed in the projecting portion 6241. An opening 6242 for circulating the cooling air is formed on the outer periphery of the outer periphery. However, the opening 6242 does not communicate with the first duct portion 7B, and the flow path of the cooling air flowing through the opening 6242 and the flow path of the cooling air flowing through the first duct portion 7B are respectively be independent.

On the top end side in the X direction of the top surface portion 624, an upright portion 6243 that rises toward the front end side in the Y direction is formed, and the upright portion 6243 abuts on the upright portion 6136 formed on the upper surface portion 613, and the container body The duct member 62 is positioned with respect to 61.
Further, on the inner surface (surface in the Y direction base end side) 624 </ b> A of the top surface portion 624, a metal plate-like body 624 </ b> A <b> 1 at a position corresponding to the opening 6134 when the duct member 62 is attached to the housing body 61. (See FIG. 10) is attached. The plate-like body 624A1 prevents light emitted from the light emitting unit 511 from directly entering the top surface part 624 through the opening 6134 and preventing the incident position of the light from deteriorating.

  The bottom surface portion 625 is formed to be substantially flat, and when the duct member 62 is attached to the housing body 61, the step portion 6141, the inclined portion 6142, and the standing portion formed on the lower surface portion 614, similar to the top surface portion 624. 6143, the opening 6144 and the wall 6145 are covered. The bottom portion 625, the lower surface portion 614, the front surface portion 621, and the back surface portion 622 form a second duct portion 7C. In addition, also on the inner surface 625A of the bottom surface portion 625, a metal plate-like body 625A1 (see FIG. 10) is attached at a position corresponding to the opening 6144.

[Composition of current plate]
The rectifying plate 63 corresponds to the rectifying member of the present invention, and is arranged in the branch portion 7A as described above, and rotates by its own weight within the range from the rotation restricting portions 6121 and 6231 to the rotation restricting portions 6122 and 6232. It moves and changes the distribution direction of some cooling air among the cooling air introduced from the introduction port 6212 to the 1st duct part 7B or the 2nd duct part 7C. The rectifying plate 63 is formed as a plate-like body, and includes a rectifying unit 631 positioned at the center, and an extending unit 632 formed on one end side of the rectifying unit 631 and extending in a direction away from each other. .

Among these, one extending portion 632 is inserted into the recess 6233, and the other extending portion 632 is inserted into the hole 641 formed in the support member 64. And this support member 64 is fixed to the above-mentioned screw hole formed in the right side surface part 623, whereby the rectifying plate 63 is pivotally supported with the extending part 632 as a rotation shaft.
The rectifying unit 631 is a part that changes the flow direction of the cooling air upward. When the rectifying plate 63 is rotated by its own weight, the rectifying unit 631 is a rotation restricting unit (rotation restricting units 6121 and 6231 when the projector 1 is in a normal position, a ceiling suspension posture). In this case, it abuts on the rotation restricting portions 6122 and 6232) and abuts on the protruding portion 6214 located on the front end side in the vertical direction. Thereby, a part of the cooling air introduced through the introduction port 6212 is changed in its flow direction upward. The other cooling air is introduced into the lamp housing 616 through the opening 6123 (see FIG. 6).

[Cooling air flow path]
Hereinafter, the flow path of the cooling air for cooling the light source lamp 50 will be described. In the following description, a case where the projector 1 is in the normal posture will be described.
8 to 10 are diagrams showing a flow path of cooling air for cooling the light source lamp 50. In other words, FIG. 8 and FIG. 10 are a transverse sectional view and a longitudinal sectional view showing the light source device 5 in a horizontal plane and a vertical plane including the central axis of the light source lamp 50. FIG. 9 is a perspective view showing the light source device 5 showing the duct member 62 with an imaginary line.
As shown in FIG. 8, the cooling air discharged from the fan 93 travels in the direction D <b> 1 and is introduced into the branch portion 7 </ b> A through the introduction port 6212. Among the cooling air, a part of the cooling air branches in the D2 direction (direction toward the tip end side in the X direction) and is introduced into the lamp housing portion 616 through the slit-shaped opening 6123. Then, the cooling air cools the sealing portion 513 side of the arc tube 51.
On the other hand, the other cooling air branches in the D3 direction (direction toward the front end side in the Y direction) by the rectifying plate 63 rotated in the vertical direction by its own weight until coming into contact with the rotation restricting parts 6121 and 6231, and the branching part 7A. The inside flows toward the first duct portion 7B.

  As shown in FIG. 9, the cooling air circulated in the direction D <b> 3 is the first duct portion surrounded by the upper surface portion 613 of the housing body 61 and the front surface portion 621, the back surface portion 622, and the top surface portion 624 of the duct member 62. Enter 7B. And the said cooling air distribute | circulates the inside of the 1st duct part 7B along D4 direction (direction which goes to the X direction front end side).

As shown in FIG. 10, the flow direction of the cooling air flowing in the D4 direction is changed to the D5 direction (direction toward the base end side in the Z direction) by the standing portion 6133.
Thereafter, the cooling air flows along the top surface portion 624, the inclined portion 6132, and the upright portion 6133, and then strikes the wall portion 6135 that is the terminal end of the first duct portion 7B, so that the lamp is accommodated through the opening portion 6134. Enter the part 616. At this time, the inclined portion 6132 is inclined toward the Y-direction distal end side toward the Z-direction proximal end side, and the end portion on the Z-direction proximal end side of the inclined portion 6132 is at the Y-direction distal end side. A curved portion 61321 that warps toward is formed. Furthermore, the wall 6135 that forms the edge of the opening 6134 is a wall that is perpendicular to the inner surface 624A of the top surface 624 (the surface 624A that faces the upper surface 613 of the housing body 61). For this reason, the cooling air flowing along the inclined portion 6132 is linearly distributed in the direction D6, that is, in the direction toward the upper portion of the light emitting portion 511, by the inclined portion 6132, the curved portion 61321, the inner surface 624A, and the wall portion 6135. Will change.

And the cooling air which distribute | circulated to the D6 direction distribute | circulates to the D7 direction which is the same direction as the said D6 direction, and is ventilated on the upper part of the light emission part 511 located on the said D7 direction. At this time, the opening end of the main reflecting mirror 52 (the end edge on the tip end side in the Z direction of the reflecting portion 522) is in contact with the end surface of the wall portion 6135 on the base end side in the Z direction. The cooling air can be blown over the light emitting unit 511 without changing the traveling direction of the cooling air introduced into the storage unit 616. As a result, the cooling air that has flowed through the first duct portion 7B does not flow along the reflection surface 5221 of the main reflecting mirror 52, but is directly blown to the upper portion of the light emitting portion 511, and the upper portion of the light emitting portion 511 is effective. Can be cooled.
The cooling air that has cooled the light-emitting portion 511 and the cooling air that has been introduced through the opening 6123 at the branching portion 7A and has cooled the sealing portion 513 are on the opposite side of the opening 6123. The air is sucked by the fan 94 through the opening 6151 formed in the left side surface portion 615 and discharged to the outside of the storage body 6.

  Note that when the light source device 5 is turned upside down, that is, when the projector 1 is in the ceiling position, the rotation direction of the rectifying plate 63 is reversed, and the cooling air branched at the branching portion 7A is Circulates in the second duct portion 7C. At this time, since the second duct part 7C has the same configuration as the first duct part 7B, the cooling air circulated in the second duct part 7C is blown to the upper part of the light emitting part 511 even in the ceiling hanging position. And the upper part is effectively cooled.

FIG. 11 is a cross-sectional view showing a light source device 5A as a comparative example with respect to the present embodiment, in other words, a vertical cross-sectional view showing the light source device 5A in which a flat portion 6132A is formed instead of the inclined portion 6132.
Here, the flow path of the cooling air when the inclined portion 6132 is not formed will be described. The light source device 5A shown below has the same configuration as the light source device 5 except that it includes a flat portion 6132A along the Z direction and the X direction instead of the inclined portion 6132, and is the same as the already described portion. Or about the substantially same part, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The cooling air that has circulated in the first duct portion 7B of the light source device 5A circulates in the F5 direction (the direction toward the base end side in the Z direction) along the top surface portion 624, the flat portion 6132A, and the standing portion 6133. Here, since the flat portion 6132A has a flat surface along the Z direction together with the opposing inner surface 624A, the cooling air flows in the F6 direction along the wall portion 6135 and passes through the opening 6134. The lamp enters the lamp housing 616.

  The cooling air that has entered the lamp housing 616 diffuses in the lamp housing 616. Among these, a part of the cooling air flows in the F7 direction along the reflecting surface 5221 of the main reflecting mirror 52. This cooling air flows between the reflecting surface 5221 and the light emitting unit 511, and a further part of the cooling air is blown to the upper part of the light emitting unit 511. For this reason, compared with the light source device 5 in which the inclination part 6132 was formed, the flow volume and wind pressure of the cooling air which are blown to the light emission part 511 upper part are low, and the cooling efficiency of the said upper part is low.

The projector 1 according to the present embodiment described above has the following effects.
The cooling air flowing through the first duct portion 7B is circulated by the inclined portion 6132 while being inclined toward the inner surface 624A facing the upper surface portion 613 where the opening 6134 is formed. For this reason, the cooling air travels with the inclined portion 6132, the inner surface 624 </ b> A, and the wall portion 6135 having a flow direction changed toward the light emitting portion 511 through the opening portion 6134. Thereby, since the cooling air can be blown linearly from the opening 6134 to the upper portion of the light emitting portion 511 while avoiding the sub-reflecting mirror 54, the upper portion of the light emitting portion 511 can be effectively cooled. In addition, since the curved portion 61321 that is warped toward the Y-direction distal end side is formed on the Z-direction base end side of the inclined portion 6132, the cooling air is further angled toward the upper portion of the light-emitting portion 511. Can blow.

  Furthermore, even when the cooling air blowing direction to the light source device 5 is from the front side of the light source device 5, the cooling air can be appropriately blown to the upper part of the light emitting unit 511 by the above-described configuration. The fan 93 to be cooled can be disposed at a position that does not affect the size of the projector 1. Therefore, the light source device 5 can be efficiently cooled without increasing the size of the projector 1.

  Further, since the first duct portion 7B and the second duct portion 7C having the same configuration as the first duct portion 7B are located above and below the housing 6, that is, above and below the arc tube 51, the projector 1 However, in any of the normal position and the ceiling position, the cooling air can be blown to the upper part of the light emitting unit 511. Accordingly, the upper part of the light emitting unit 511 can be actively cooled, and the temperature difference between the upper part and the lower part of the light emitting part 511 can be reduced, so that the deterioration of the arc tube 51 can be further suppressed.

  The open end of the main reflecting mirror 52 is brought into contact with the end surface of the wall portion 6135 on the base end side in the Z direction. According to this, since the opening 6134 whose edge is formed by the wall 6135 and the opening end of the main reflecting mirror 52 are close to each other, the distance is shorter than when they are separated from each other. Cooling air can be blown linearly to the upper part of the light emitting unit 511. Therefore, the cooling air can be reliably blown to the upper part of the light emitting unit 511, and the cooling efficiency of the upper part can be improved.

  Among the cooling air introduced into the branch portion 7A, a part of the cooling air is introduced into the lamp housing portion 616 through the opening 6123, and cools the sealing portion 513 side of the arc tube 51. According to this, since the entire arc tube 51 can be cooled together with the cooling air flowing through the first duct portion 7B or the second duct portion 7C, the cooling efficiency of the arc tube 51 is increased, and the arc tube 51 is further improved. It is possible to achieve a long life.

Since the arc tube 51 is provided with a sub-reflecting mirror 54 that covers the sealing portion 513 side of the light-emitting unit 511, a part of light that does not directly enter the main reflecting mirror 52 is partly reflected by the sub-reflecting mirror 54. 52 can be made incident. Therefore, the utilization efficiency of the light emitted from the light emitting unit 511 can be improved.
Further, as described above, even when the sub-reflecting mirror 54 is provided, the cooling air can be blown linearly to the upper part of the light-emitting unit 511, so that the sub-reflecting mirror 54 is avoided and the light-emitting unit is avoided. The upper part of 511 can be cooled appropriately.

  A rectifying plate 63 that rotates due to its own weight is provided in the branching portion 7A. By the rectifying plate 63, a duct portion located above the arc tube 51 among the first duct portion 7B and the second duct portion 7C. Cooling air can be circulated. Therefore, even when the projector 1 is in the normal position or the ceiling position, the cooling air can be blown to the upper part of the light emitting unit 511 to appropriately cool the upper part.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the inclined portion 6132 is formed with the curved portion 61321 warped toward the distal end side in the Y direction on the base end side in the Z direction, but the present invention is not limited to this. For example, the curved portion 61321 may not be formed. Further, the above-described flat portion 6132A may have an inclined portion that is warped toward the distal end side in the Y direction in the vicinity of the opening 6134 on the proximal end side in the Z direction. In this case, the inclined portion corresponds to the inclined portion of the present invention. The same applies to the inclined portion 6142.

  In the said embodiment, although the wall part 6135 became a perpendicular | vertical wall with respect to the inner surface 624A of the top | upper surface part 624, this invention is not limited to this. That is, the angle of the wall portion with respect to the inner surface 624A may be an angle that allows the cooling air flowing through the first duct portion 7B to be blown to the upper portion of the light emitting portion 511, and may be set as appropriate. The same applies to the wall 6145.

  In the above embodiment, the opening end of the main reflecting mirror 52 is in contact with the Z direction base end side of the wall portion 6135, but the present invention is not limited to this. That is, the opening 6134 in which the edge is formed by the wall 6135 and the opening end of the main reflecting mirror 52 may be separated from each other. The same applies to the opening 6144 and the wall 6145.

  In the above embodiment, the arc tube 51 includes the substantially spherical light emitting part 511 and the pair of sealing parts 512 and 513 extending from both ends of the light emitting part 511 in a direction away from each other. Is not limited to this. That is, it is sufficient if there is a light emitting part and a sealing part extending from one end of the light emitting part. Further, the sub-reflecting mirror 54 may be omitted.

  In the above-described embodiment, the rectifying plate 63 uses the extending portion 632 as a rotation shaft and rotates by its own weight, so that a part of the cooling air introduced into the branch portion 7A is converted into the first duct portion 7B or the first duct. Although the air is guided to the two duct portions 7C, the present invention is not limited to this. For example, a rectifying member that moves by its own weight, shields the flow path to the duct portion located below the first duct portion and the second duct portion, and guides cooling air to the duct portion located above. It may be adopted.

  In the said embodiment, although the light source device 5 was set as the structure provided with 7 A of branch parts, the 1st duct part 7B, and the 2nd duct part 7C by which the baffle plate 63 is arrange | positioned inside, this invention is not limited to this. For example, when the projector 1 is not in the ceiling-suspended posture, the second duct portion 7C and the rectifying plate 63 may not be provided.

In the embodiment, the projector 1 includes the three liquid crystal panels 442R, 442G, and 442B, but the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal panels.
In the above-described embodiment, the configuration in which the optical unit 4 has a substantially L shape in plan view has been described. However, the configuration is not limited thereto, and for example, a configuration having a substantially U shape in plan view may be employed.
Furthermore, in the above-described embodiment, the transmissive liquid crystal panel 442 having a different light beam incident surface and light beam emission surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emission surface may be used. Good.

  In the above embodiment, the projector 1 including the liquid crystal panel 442 is illustrated as the light modulation device. However, the light modulation device that modulates the incident light beam according to the image information to form an optical image has other configurations. A modulation device may be employed. For example, the present invention can be applied to a projector using a light modulation device other than liquid crystal, such as a device using a micromirror. When such a light modulation device is used, the polarizing plates 443 and 445 on the light incident side and the light emitting side can be omitted.

  In the embodiment, the light source device 5 is employed in the projector 1, but the present invention is not limited to this. That is, such a light source device 5 can be used for an illumination device such as a stand.

  The present invention can be used for a light source device, and can be preferably used particularly for a light source device employed in a projector.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 5 ... Light source device, 6 ... Storage body, 7 ... Duct part, 51 ... Light emission tube, 52 ... Main reflecting mirror (1st reflecting mirror), 54 ... Sub reflecting mirror (2nd reflecting mirror), 63 ... Rectifying plate (rectifying member), 7A ... branching portion, 7B ... first duct portion, 7C ... second duct portion, 511 ... light emitting portion, 512 ... sealing portion (first sealing portion), 513 ... sealing portion ( 2nd sealing portion), 5221 ... reflective surface, 6123 ... opening (second opening), 6132, 6142 ... inclined portion, 6134, 6144 ... opening (first opening), 6135, 6145 ... wall.

In order to achieve the above-described object, the light source device of the present invention includes a light emitting unit that emits light, a light emitting tube including a first sealing unit that extends from one end of the light emitting unit, and the first sealing. A first reflecting mirror having a substantially concave curved reflecting surface that is attached to a part and reflects light emitted from the light emitting part, and a storage body that houses the arc tube and the first reflecting mirror, The storage body includes a duct portion that is positioned above the arc tube and in which cooling air flows in a direction opposite to a traveling direction of the light reflected by the reflecting surface, and the duct portion includes the arc tube Forming a first opening located on the distal end side in the traveling direction from the opening end of the first reflecting mirror, and an edge on the proximal end side in the traveling direction in the first opening, and the duct And the side opposite to the surface where the first opening is formed Provided on a surface, characterized by having a a metallic plate body to which light is incident through the first opening.
In addition, a light source device according to a related technology of the present invention is attached to the first sealing portion, a light emitting unit that emits light, a light emitting tube including a first sealing portion that extends from one end of the light emitting portion, and the first sealing portion. A first reflecting mirror having a substantially concave curved reflecting surface for reflecting the light emitted from the light emitting unit, and a housing for housing the arc tube and the first reflecting mirror, The cooling air is located above the arc tube and extends along the central axis of the light beam reflected by the reflecting surface, and the cooling air is directed in a direction opposite to the traveling direction of the light reflected by the reflecting surface. A duct portion that circulates, the duct portion opening toward the arc tube, and a first opening portion that is located on the front end side in the traveling direction from the opening end of the first reflecting mirror; and the first opening portion Forms an edge on the base end side in the traveling direction and becomes the end of the duct part And an inclined portion that is provided in the vicinity of the edge on the front end side in the traveling direction in the first opening, and inclines the cooling air toward a surface opposite to the surface on which the first opening is formed. And a metal plate-like body that is provided on the surface on the opposite side and into which the light is incident through the first opening.

According to the related art , the cooling air flowing through the duct portion is inclined toward the surface opposite to the surface on which the first opening is formed by the inclined portion provided in the vicinity of the first opening. The For this reason, when the said cooling air passes through the 1st opening part opened toward the arc_tube | light_emitting_tube, the angle changes with respect to the distribution direction in a duct part by the said surface and wall part on the opposite side, and distribute | circulates. By positioning the light emitting unit on the flow direction of the cooling air, the cooling air that has circulated through the duct portion can be blown linearly to the light emitting unit.
Moreover, since the duct part is located above the arc tube, the cooling air that has circulated through the duct part is blown to the upper part of the light emitting part. According to this, the upper part of the light emitting part can be positively cooled by the cooling air, and the temperature difference between the upper part and the lower part can be reduced, so that the deterioration of the arc tube can be suppressed.
Therefore, the upper part of the arc tube can be appropriately cooled, and the life of the arc tube can be extended.

In the present invention, the duct portion is disposed so as to face each other around the arc tube, and includes the first duct portion and the second duct portion having the first opening portion and the wall portion , respectively, and the plate shape It is preferable that the body is provided on each of the opposite surface of the first duct portion and the opposite surface of the second duct portion.
In this invention, the said duct part moves with dead weight, and the rectification | straightening member which distribute | circulates the said cooling air toward the duct part located above the said arc_tube | light_emitting_tube among the said 1st duct part and the said 2nd duct part. It is preferable to provide.
According to the present invention, even when the storage body is turned upside down, the rectifying member that moves due to its own weight causes the cooling air to flow into the duct portion located above the arc tube among the first duct portion and the second duct portion. Since it can be made to distribute | circulate, as above-mentioned, cooling air can be directly blown on the light emission part upper part. Therefore, even when the storage body is arranged so that one of the first duct portion and the second duct portion is positioned above the arc tube, the arc tube can be appropriately cooled.

Claims (7)

A light-emitting portion that emits light, and a light-emitting tube including a first sealing portion that extends from one end of the light-emitting portion;
A first reflecting mirror attached to the first sealing portion and having a substantially concave curved reflecting surface for reflecting light emitted from the light emitting portion;
A storage body for storing the arc tube and the first reflecting mirror;
The housing is located above the arc tube and extends along a central axis of a light beam reflected by the reflecting surface, so that the cooling air is opposite to the traveling direction of the light reflected by the reflecting surface. It has a duct part that circulates in the direction,
The duct part is
A first opening that opens toward the arc tube and is positioned on the front end side in the traveling direction from the opening end of the first reflecting mirror;
A wall portion forming an end edge of the first opening portion on the proximal side in the traveling direction and serving as a terminal end of the duct portion;
An inclined portion provided in the vicinity of an edge of the first opening on the front end side in the traveling direction and configured to incline the cooling air toward a surface opposite to the surface on which the first opening is formed;
A light source device comprising: a metal plate that is provided on the surface on the opposite side and into which light is incident through the first opening. The light source device according to claim 1,
The duct portion is disposed so as to face each other with the arc tube as a center, and includes a first duct portion and a second duct portion having the first opening, the wall portion, and the inclined portion, respectively.
The plate-like body is provided on each of the opposite surface of the first duct portion and the opposite surface of the second duct portion. The light source device according to claim 2,
The duct portion includes a rectifying member that moves due to its own weight and causes the cooling air to flow toward a duct portion located above the arc tube out of the first duct portion and the second duct portion. A light source device. The light source device according to any one of claims 1 to 3,
The light source device according to claim 1, wherein an opening end of the first reflecting mirror is in contact with an end surface of the wall portion on the base end side in the traveling direction. The light source device according to any one of claims 1 to 4,
The arc tube includes a second sealing portion extending from an end portion of the light emitting portion opposite to the first sealing portion,
The said duct part is provided with the branch part which has a 2nd opening part which branches a part of said cooling air which distribute | circulates the inside of the said duct part, and guides the said 2nd sealing part. The light source device according to any one of claims 1 to 5,
The light-emitting device includes a second reflecting mirror that covers a front end side in the traveling direction of the light-emitting section and reflects incident light toward the first reflecting mirror.   A light source device according to any one of claims 1 to 6, a light modulation device that modulates light emitted from the light source device to form image light, and a projection optical device that projects the image light. A projector comprising: