JP2007140385A - Light source device and projection type image display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device that ensures satisfactory cooling efficiency, and to provide a projection type image display apparatus capable of restraining high temperature of the light source device even when used for a long time. <P>SOLUTION: The light source device 30 has an internal wall member 50 in a housing 31, and also has a front wall 40, a side wall 60, and a rear wall 70 around the internal wall member 50. Almost a half the rear face of a reflector 22 for a light source 21 is covered with the reflector covering part 90a of a reflector heat dissipation part 90. The rear end of the reflector covering part 90a is open. A cylindrical extension part 90b extends to the rear end of the reflector covering part 90a so as to surround a cylindrical portion and a block member. The extension part 90b is in contact with the rear wall 70, so that the heat of the light source 21 is dissipated from a rear wall 70 via the extension part 90b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a light source device and a projection type image display device that have good cooling efficiency.

  A projector that projects modulated light on an image generated using a light source onto a screen to display an image on the screen includes a front projection method according to the projection method of the modulated light, and a rear projection represented by a rear projection television. There is a method. The light source used in this projection-type image display device is required to have high luminance for fine image display with excellent color reproducibility, and is a discharge-type illuminant such as a metal halide lamp and a high-pressure mercury lamp. A lamp attached to a concave reflector is often used.

  The illuminant of the light source encloses the electrode in the tube and encloses mercury, halogen gas, etc., and the pressure inside the tube exceeds 150 atm when lit, so if the tube forming the illuminant ruptures for some reason, a loud burst sound Occurs, and the inclusions and the glass pieces of the tube are scattered. Therefore, there is an explosion-proof light source in which the opening side of the reflector is closed with a glass plate or an optical lens, etc., to prevent a plosive sound and leakage of inclusions.

  In general, the light source is often housed in a storage box so that the optical axis is in a specified direction, and unitized as a light source device.

In addition, the light source becomes hot as it emits light during use (about 1000 ° C. in the chamber portion of the tube where the temperature is highest), so that it extends from the rear end of the chamber portion provided at the center of the light emitter along the bottom of the reflector. There is a light source device provided with a contact member for heat conduction provided (Patent Document 1). And there exists a light source device provided with the cover member which was provided so that the light beam emission opening part of a reflector might be covered, and the radiation fin was formed in the outer side (patent document 2). In addition, there is a light source device including a plurality of fins on four pipes protruding from flanges provided at a light beam emission opening of a reflector (Patent Document 3).
JP-A-2005-71814 JP 2005-99679 A JP 2000-131864 A

  In the light source devices according to Patent Documents 1 to 3, there is a problem that heat is not conducted toward the outside of the storage box in which the light source of the light source device is stored, and cooling efficiency is insufficient.

  The present invention has been made in view of such a problem, and a light source device having good cooling efficiency and a projection image display device in which the light source device is prevented from becoming high temperature even when used for a long time. The purpose is to provide.

In order to solve the above problems, a light source device according to the present invention has a light source having a light emitter that performs discharge light emission, a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped shape that houses the light source. The storage box includes a front wall having an opening through which light emitted from the light source passes, a back wall facing the front wall, and a side wall disposed on the side of the light source. In the light source device, the reflector heat dissipating includes a reflector covering portion that covers at least a central portion side of the back surface of the reflector, and an extending portion that extends along the back surface of the reflector covering portion so as to extend along the concave direction of the reflector. The extension part is contact | abutted to the back wall of the said storage box facing the end surface of the said extension part.
In the present invention, since the reflector coating portion is provided directly on the reflector that becomes high in temperature with light emission, the heat of the light source is conducted to the reflector coating portion. And since the extension part is contact | abutted to the back wall, heat | fever conducts favorably from an extension part to a back wall, and since it thermally radiates favorably from the back side of a reflector, cooling efficiency is favorable.

The light source device according to the present invention is characterized in that the back wall has a plurality of wall fins on at least one of an outer surface and an inner surface of the back wall.
In the present invention, since the back wall includes the wall fins, the area that can be in contact with the external air or the internal air can be increased, the heat transfer from the air inside the apparatus to the back wall can be enhanced, and the back outside the apparatus The heat dissipation of the heat that has moved to the wall can be improved.

The light source device of the present invention includes a light source having a light emitter that performs discharge light emission, a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped storage box that stores the light source. Is a light source device having a front wall having an opening through which light emitted from the light source passes, a back wall facing the front wall, and a side wall disposed on the side of the light source in the periphery. A reflector heat-dissipating part having a reflector covering part covering at least the central part of the reflector, and the reflector heat-dissipating part is connected to the side wall of the storage box facing the side of the reflector heat-dissipating part. To do.
In the present invention, since the reflector coating portion is provided directly on the reflector that becomes high in temperature with light emission, the heat of the light source is conducted to the reflector coating portion. And since the reflector thermal radiation part is connected to the side wall, heat | fever conducts favorably from an extension part to a side wall, and it thermally radiates favorably from the side of a reflector, and its cooling efficiency is favorable.

The light source device of the present invention is characterized in that the side wall includes a plurality of wall fins on at least one of an outer surface and an inner surface of the side wall.
In the present invention, since the side wall is provided with the wall fins, the area that can come into contact with the external air or the internal air can be increased, heat transfer from the air inside the apparatus to the side wall can be enhanced, and the side wall moves outside the apparatus. The heat dissipation of the heat that has been done can be improved.

The light source device of the present invention includes a light source having a light emitter that performs discharge light emission, a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped storage box that stores the light source. Is a light source device having a front wall having an opening through which light emitted from the light source passes, a back wall facing the front wall, and a side wall disposed on the side of the light source in the periphery. A reflector covering portion that covers at least the center portion of the reflector, and a reflector heat dissipating portion that extends along the back surface of the reflector covering portion so as to extend along the concave direction of the reflector. The extending portion is in contact with the back wall of the storage box facing the end surface of the mounting portion, and the reflector heat radiating portion is connected to the side wall of the storage box facing the side of the reflector heat radiating portion. Specially To.
In the present invention, since the reflector coating portion is provided directly on the reflector that becomes high in temperature with light emission, the heat of the light source is conducted to the reflector coating portion. And since the extension part is in contact with the back wall and the reflector heat dissipating part is connected to the side wall, heat is conducted well from the reflector heat dissipating part to the back wall, and heat is also conducted well to the side wall. Heat is radiated well from the back side and the side of the reflector.

The light source device according to the present invention is characterized in that the extending portion is cylindrical.
In the present invention, the area in contact with the air introduced into the apparatus can be increased, and heat can be dissipated by heat conduction in contact with the wall surface of the apparatus, resulting in good cooling efficiency.

The light source device according to the present invention is characterized in that the extending portion is composed of a plurality of plates extending along a recess direction of the reflector.
In the present invention, the area in contact with the air introduced into the apparatus can be increased, and heat can be dissipated by heat conduction in contact with the wall surface of the apparatus, resulting in good cooling efficiency.

The light source device of the present invention is characterized in that the reflector heat dissipating part includes a plurality of heat dissipating part fins extending in the vertical direction on the outer surface of the reflector heat dissipating part.
The area which is introduced into the apparatus and comes into contact with the rising air can be further increased by the covering portion fins, and the cooling efficiency is good.

The light source device of the present invention is characterized in that the reflector heat dissipating part is formed integrally with the back wall.
In the present invention, heat is conducted more favorably from the reflector heat radiating portion to the back wall and radiated.

The light source device of the present invention is characterized in that the reflector heat radiating portion is formed integrally with the side wall.
In the present invention, heat is more favorably conducted from the reflector heat radiating portion to the side wall, and is radiated.

The light source device of the present invention includes an inner wall member having an inner wall facing the back wall of the storage box with a gap and an inner wall facing the side wall of the storage box with a gap.
In the present invention, an inner wall material is provided, and gas flows through the space between the inner wall material and the inner wall of the storage box, so that the gas flowing in each space travels in contact with the inner wall, and the inner wall is a light emitter. Since the temperature is lower than that of the gas that cools the reflector, heat conduction is continuously generated that the gas continuously contacts the inner wall while the gas passes through the space and the heat of the gas moves to the inner wall. It becomes possible to take heat well. As a result, the high temperature reflector and the like can be cooled again with the gas that has been deprived of heat and the temperature has decreased, and sufficient cooling performance can be maintained even in a light source device having a sealed storage box.

A projection type image display apparatus according to the present invention includes any one of the light source devices described above, a spatial light modulation element that generates modulated light according to an image with light emitted from a light emitter included in the light source device, and the spatial light modulation. And a projection lens that projects the modulated light generated by the element onto the projection target.
In this invention, even if it uses for a long time, it is suppressed that a light source device becomes high temperature.

  According to the light source device of the present invention, since the reflector coating portion is provided directly on the reflector that becomes high temperature due to light emission, the heat of the light source is conducted to the reflector coating portion. And since the reflector heat radiating part is connected to the back wall or side wall of the storage box, heat is conducted well from the reflector heat radiating part to the wall, and heat is radiated well from the back side or the side of the reflector, resulting in good cooling efficiency. It is.

  According to the projection type image display device of the present invention, the light source device is suppressed from becoming high temperature even when used for a long time.

Embodiment 1 FIG.
FIG. 1A is a cross-sectional view showing a rear projection apparatus 1 (projection type image display apparatus) according to an embodiment of the present invention.

  The rear projection apparatus 1 has a configuration in which a lower casing 2 and an upper casing 3 are combined in appearance, and the lower casing 2 includes an optical unit that performs a projection process of modulated light representing an image through a projection lens 12 therein. 10. A control unit 5 that performs overall control processing of the apparatus, a power supply unit 4 that supplies power to each unit, and the like are housed. The upper housing 3 has a reflection mirror 1a attached to the inner surface side of the back wall 3a and a screen 1b (corresponding to a projection object) attached to the front frame 3b. With the above configuration, in the rear projection apparatus 1, the modulated light representing the image projected from the projection lens 12 is reflected to the screen 1b by the reflection mirror 1a, and the image is displayed on the screen 1b.

  FIG. 1B is a cross-sectional view taken along line AA in FIG. In the optical unit 10, a lamp unit 20, an optical engine 13 including a spatial light modulator 14, and a substrate circuit unit 15 including a processing circuit for the optical engine 13 are mounted on a base plate 10 a. In the lamp unit 20, a light source device 30 including a light source 21 is mounted inside a lamp housing 80. The lamp unit 20 sucks air (gas) for cooling the light source device 30 through the intake duct 6 from the intake opening 2b of the back wall portion 2a of the lower housing 2 and air that has become hot due to cooling (air) Heat) is exhausted outwardly from the exhaust opening 2d of the oblique wall 2c through the exhaust duct 7.

  The optical engine 13 accommodates light transmitting members of various optical systems that allow light from the light source 21 to pass and be reflected therein, and guides the light to the spatial light modulation element 14 by the passage and reflection of each light transmitting member. Based on the control processing of the substrate circuit unit 15, the spatial light modulator 14 generates modulated light representing an image. Furthermore, the optical engine 13 has a projection lens 12 attached at a predetermined angle at a light exit location, and projects the generated modulated light from the projection lens 12.

  FIG. 2 shows a state in which the lamp housing 80 and the light source device 30 constituting the lamp unit 20 of the optical unit 10 are disassembled. The lamp housing 80 includes a box-shaped housing 81 in which the light source device 30 is mounted from an opened entrance 81 c and a suction fan 85 that sucks air (gas) inside the housing 81. The Z axis in the XYZ coordinates shown in FIG. 2 indicates a direction parallel to the optical axis of the light source device 30 (light source 21), the X axis is orthogonal to the Z axis, and the direction in which the light source device 30 is mounted on the housing 81. A parallel direction is indicated, and the Y-axis indicates a direction orthogonal to a plane (XZ plane) constituted by the X-axis and the Z-axis (hereinafter the same).

  The housing 81 basically has a structure covering the area other than the entrance / exit 81c, and forms a light passage port 81b for allowing the light emitted from the light source device 30 to pass through the wall 81a on the side joined to the optical unit 13. ing. Further, the housing 81 has a suction fan 85 attached to the outer surface of the peripheral wall portion 81e facing the entrance / exit 81c.

  Further, female connectors 83 and 84 are attached to the housing 81 at the upper and lower peripheral edges of the entrance / exit 81c. The female connector 83 is a connector for supplying power to the light source 21, and the female connector 84 is a connector for supplying power to the circulation fan 29 attached to the light source device 30.

  Furthermore, the suction guide portion 82 projects outward from the housing 81 at the four peripheral edges except for the portion where the female connectors 83 and 84 of the entrance / exit 81c are attached. The suction guide portion 82 has an inner surface that is inclined so as to spread outward in the surroundings. When the suction fan 85 of the housing 81 is activated, the air existing around the entrance / exit 81 c is smoothly transferred into the housing 81. At the same time, it serves as a guide when the light source device 30 is mounted on the lamp housing 80.

  On the other hand, as shown in FIGS. 2 to 4, the light source device 30 is configured to store the light source 21 in a hexahedral housing 31, and the housing 31 has a hole 41 b through which light emitted from the light source 21 passes. , A side wall 30a having a circulation fan 29 for circulating the air (gas) in the casing 31, attached to the outer surface, a back wall 70 facing the front wall 40, and another side wall facing the one side wall 30a. 60 is provided around. The casing 31 has a side wall 30a divided into two, the side connected to the front wall 40 in the circumferential direction is a front part 42, and the side connected to the back wall 70 is a rear part 34. The outer surface of the rear part 34 A circulation fan 29 is attached to 34a.

  The other side wall 60 shown in FIG. 3 has a plurality of outer fins 62 projecting from the outer surface 61a of the wall portion 61 of the plate-like member, and a plurality of inner fins (wall fins) 63 projecting from the inner surface 61b. Both the fins 62, 63 extend in the circumferential direction (Z-axis direction) at the attachment location of the other side wall 60 of the casing 31, and the pitch of the inner fins 63 is narrower than the pitch of the outer fins 62. ing.

  Further, among the plurality of inner fins 63, the one located in the vicinity of the center 63a in the height direction (Y-axis direction) has an end portion extending forward. In this way, the air that has passed through the reflector 22 and has exited from the passage portion 22b on the discharge side has an end extending at the inflow portion 40c that spreads up and down in the Y-axis direction of the front wall 40 shown in FIG. Due to the influence of the inner fin 63, the passage resistance at the center 63a in the height direction is increased to facilitate the flow of air in the vertical direction, and the air that has passed through the narrow passage portion 22b is uniformly diffused up and down. The other side wall 60 having the outer fin 62 and the inner fin 63 is integrally formed of aluminum in order to improve heat dissipation.

  The back wall 70 basically has the same structure and material as the other side wall 60, and a plurality of outer fins 72 project from the outer surface 71 a of the wall portion 71, and a plurality of inner fins 73 protrude from the inner surface 71 b. Is protruding. The central part of the inner fin 73 on the center side is not in a circular shape so that the arc-shaped end surface of the extended part 22b of the reflector heat radiating part 22 described later is brought into contact with the inner surface 71b. Similar to the side wall 60, the pitch of the inner fins 73 is narrower than the pitch of the outer fins 72. Further, the back wall 70 is attached to the housing 31 by engagement, and two engagement protrusions 74 and 75 are provided on the upper side 71c and the lower side 71d of the wall 71, respectively. Yes.

  The housing 31 accommodates an inner wall member 50 facing the other side wall 60, the back wall 70, and the rear portion 34 therein, and air is circulated along each wall 60, 70 by the guide of the inner wall member 50, It is comprised so that it may radiate from each wall 60 and 70 (FIG. 4).

  As shown in FIG. 3, the front wall 40 of the housing 31 is a substantially L-shaped member integrated with the front portion 42 in a plan view, and the front wall 40 and the front portion 42 have a thermal conductivity compared to iron. It is integrally formed by casting (aluminum die casting) using high aluminum (ADC12) as a material. The front wall 40 is integrally provided with a plurality of outer fins 44 on the outer surface 41a of the plate-like wall plate portion 41, and the plurality of outer fins 44 extend along the X-axis direction (the circumferential direction of the front wall 40). It is extended. On the other hand, the front portion 42 is integrally provided with a duct portion 43 connected to the discharge port 29 a of the circulation fan 29, and a duct fin 45 extending in the Y-axis direction on the outer surface of the duct portion 43. And is integrally formed.

  The light source 21 is attached to the inner surface 41 c side of the front wall 40. The light source 21 of the present embodiment has an explosion-proof specification. As shown in FIGS. 3 and 4, a light emitter 24 is attached in a concave reflector 22, and a disk-shaped explosion-proof glass 23 is provided in an opening 22 c on the reflection side of the reflector 22. Is attached. The reflector 22 is a cylinder in which the inner peripheral surface side having a required curvature is a reflective surface, vent portions 22a and 22b are formed at opposite positions on the outer peripheral portion, and the end of the light emitter 24 is attached to the top of the outer peripheral wall. A portion 22d is projected.

  A cylindrical member 22 d of the reflector 22 has a block member 25 attached to an end thereof, and the block member 25 has a power supply line d that is conductively connected to the light emitter 24. The power supply line d has a connector C1 attached to the end thereof, and extends outward through a notch 42f provided in the front portion 42 (see FIG. 2). The light emitter 24 having one end attached to the cylindrical portion 22d specifically corresponds to a metal halide lamp, a high-pressure mercury lamp, or the like, and includes a chamber portion 26 having a spherically expanded diameter at the center in the longitudinal direction (Z-axis direction). In addition, the front and rear of the chamber portion 26 are sealed portions 24a and 24b. The light source 21 having such a configuration is attached so that the peripheral edge on the opening side of the reflector 22 is in contact with the front wall 40.

  The reflector 22 is covered with a reflector covering portion 90 a of the reflector heat dissipating portion 90 at approximately one half of the back surface. A rear end portion of the reflector covering portion 90a is opened, and a cylindrical extending portion 90b extending toward the rear end side so as to surround the cylindrical portion 22d and the block member 25 is provided on the rear end side of the reflector covering portion 90a. Is provided. As described above, since the central portion of the inner fin 73 of the back wall 70 is missing, the end surface of the extending portion 90b is in contact with the portion lacking in the circular shape. A window 90c is provided on the side facing the one side wall 30a of the extended portion 90b, and a power supply line d that is conductively connected to the light emitter 24 is drawn out of the extended portion 90b from the window 90c.

  FIG. 5 is a perspective view from the inner surface 41c side of the front wall 40 with the light source 21 removed, and the inner surface 41c is provided with wall portions 40b surrounding the reflector 22 of the light source 21 at four locations around the hole 41b. At the same time, the inner fins 40a extending in the Y-axis direction are erected outward from the four wall portions 40b.

  Further, the upper and lower wall portions 40b on the right side in FIG. 5 are continuous with the air flow guide wall 40d extending in the vertical direction (Y-axis direction) on the right end side of the inner surface 41c, and are surrounded by the air flow guide wall 40d. Is configured such that air that has passed through a vent 22b (see FIG. 4) on the discharge side provided in the reflector 22 of the light source 21 flows.

  As shown in FIG. 4, the outer periphery of the reflector 22 of the light source 21 attached to the inner surface 41 c of the front wall 40 becomes a closed space H closed by the inner wall member 50, and the inner fin 40 a of the inner surface 41 c of the front wall 40. The part which formed is exposed to the closed space H. Further, in the closed space H, natural convection in which air rises from the bottom to the top is generated by the heat of the reflector 22, and the inner fin 40a extends in a direction along the natural convection (Y-axis direction), so that the natural convection is not disturbed. The contact area with the closed space H is increased by the inner fins 40 a so that the heat in the closed space H can be transferred to the front wall 40.

  The casing 31 to which the front wall 40 and the front portion 42 are attached is a top plate portion 32, a rear portion 34 forming a part of one side wall 30a (see FIG. 2), and a bottom plate portion 33 as shown in FIG. Are integrally formed, and are U-shaped when viewed from the Z-axis direction. The casing 31 is made of iron, which has a lower thermal conductivity than aluminum, and the heat generated by the light source 21 is less likely to be transmitted to the casing 31 so that the circulation fan attached to the rear portion 34 is used. 29 is not affected by heat.

  The top plate portion 32 and the bottom plate portion 33 are formed substantially symmetrically in the vertical direction, the edge portion on the side where the front wall 40 is attached is provided with a front wall screw hole portion 31a, and the edge portion on the side where the other side wall 60 is attached. Side wall screw holes 31b are provided, notches 35 and 36 are formed in the edge portion on the side to which the back wall 70 is attached, and a convex portion 38 for positioning and fixing the inner wall member 50 on the inner surface side. , 39 project.

  In addition, the rear portion 34 on the side of the housing 31 is provided with a protruding piece 37 that protrudes forward from the vicinity of the outlet 29 a of the circulation fan 29 attached to the outer surface 34. The projecting piece 37 has a root portion 37a and a tip portion 37b having a bent tip, and the root portion 37a blocks the opening 43a of the duct portion 43 shown in FIG. The leading end portion 37b covers the duct groove 46 to form an air path in the duct groove 46 (see FIG. 4).

  The inner wall member 50 shown in FIG. 3 includes a first inner wall 51 and an inner surface 71b of the wall portion 71 of the back wall 70 that are opposed to the inner surface 61b of the wall portion 61 of the other side wall 60 with a gap in the assembled state of the casing 31. The second inner wall 52 that is opposed to the inner surface 34b of the rear portion 34, the third inner wall 53 that is opposed to the inner surface 34b of the rear portion 34, and the bent wall portion 54 in which the end portion of the third inner wall 53 is bent. (See FIG. 4).

  The first inner wall 51 projects a closing plate portion 51c near the center of the front end portion, and this closing plate portion 51c is an inflow portion provided on the inner surface 41c of the front wall 40 shown in FIG. The opening range on the reflector 22 side of 40c is closed to form a path for the air that has exited from the ventilation portion 22b of the reflector 22. The first inner wall 51 is formed with bent plate portions 55 and 56 at the upper and lower ends, and the bent plate portions 55 and 56 are provided with holes 55a, 55b, 56a and 56b.

A through hole 52 a is provided in the central portion of the second inner wall 52 in order to allow the extending portion 90 b of the reflector heat radiating portion 90 to penetrate and contact the inner surface 71 b of the back wall 70.
The bent wall portion 54 of the inner wall member 50 forms a bent portion 58 at the end, and the engagement pieces 58 a and 58 b protruding from the bent portion 58 are provided in the rear portion 34 of the housing 31. Is inserted into and engaged with the engaging portion (see FIG. 3).

Next, a procedure for assembling the light source device 30 by assembling the light source 21 and the front wall 40, the inner wall member 50, the other side wall 60, and the back wall 70 constituting the housing 31 will be described.
First, as shown in FIG. 3, the inner wall member 50 is inserted into the housing 31 to be engaged and fixed. At this time, the engaging pieces 58 a and 58 b provided on the bent portion 58 of the inner wall member 50 are inserted into and engaged with the engaging portions provided on the rear portion 34 of the housing 31, and the first inner wall 51 is bent. The upper and lower convex portions 38 and 39 of the housing 31 are inserted into the holes 55 a, 55 b, 56 a and 56 b of the plate portions 55 and 56, respectively, and the inner wall member 50 is fixed in the housing 31. As described above, since no screws are used to fix the inner wall member 50, the inner wall member 50 can be attached to the housing 31 with one touch.

  After the inner wall member 50 is attached, the reflector heat dissipating part 90 fitted with the light source 21 is brought into contact with the inner surface 41c of the front wall 40, and then the integrated front wall 40 and front part 42 are connected to the front end of the housing 31 and It is fixed to the front of one side by screwing (see FIG. 3).

  Next, the engaging protrusion 74 (75) of the back wall 70 is fitted into the notch groove 35 (36) of the housing 31.

  Finally, the other side wall 60 is screwed and fixed to the housing 31, the end surface of the back wall 70 is suppressed by the back side end of the other side wall 60 (see FIG. 4), and the connector C 1 of the light source 21 is connected to the upper rectangle of the front part 42. The light source device 30 is completed by fitting into the hole 42c and fitting the fan connector C2 of the circulation fan 29 into the lower rectangular hole 42d.

  As shown in FIG. 4, in the completed light source device 30, a first space 30 b is formed between the other side wall 60 and the first inner wall 51, and a second space is formed between the back wall 70 and the second inner wall 52. A space 30 c is formed, and a third space 30 d is formed between the rear portion 34 and the third inner wall 53. Therefore, when the circulation fan 29 is activated, the air discharged from the circulation fan 29 enters the reflector 22 of the light source 21 from the duct groove of the duct portion 43, cools the light emitter 24 inside the reflector 22, and becomes high temperature. The air that has left the reflector 22 passes through the first space 30b, the second space 30c, and the third space 30d and is sucked by the circulation fan 29 and circulates in the housing 31.

  At this time, when the high temperature air passes through the first space 30b and the second space 30c, it contacts the plurality of inner fins 63, 73 over a wide area. It moves to the side wall 63 and the back wall 70, and air is cooled. In addition, the air which flowed into the reflector 22 flows into the top part 26a of the chamber part 26 of the light emitter 24 and the tip of the sealing part 24a side by the duct groove 46 described above, and cools it.

  Further, the heat of the light source 21 itself also moves to the front wall 40 that is in contact with the heat, and the heat that has moved to the front wall 40 dissipates outward from the outer fins 44 to increase the cooling efficiency of the light source 21. The heat transmitted to the duct portion 43 is also radiated to the outside through the duct fin 45.

In the present embodiment, since the reflector covering portion 90a of the reflector heat radiating portion 90 directly covers the reflector 22, the heat of the light emitter 24 and the reflector 22 is conducted to the reflector covering portion 90a, and the extending portion 90 is Since it is in contact with the wall 70, heat is conducted well from the extended portion 90b to the back wall 70, and heat is also radiated from the back side of the reflector 22, so that the cooling efficiency is good. The reflector heat radiating portion 90 is cooled by the air flowing between the inner wall member 50 and the other side wall 63, the back wall 70, and the rear portion 34.
In addition, the reflector coating | cover part 90a is not limited when covering the half of the back surface of the reflector 22. FIG. The light source device 30 may not have the inner wall member 50, but the cooling efficiency is better when the inner wall member 50 is provided.

  The completed light source device 30 is mounted on the housing 81 of the lamp housing 80 as shown in FIG. 2, and the connector C1 of the light source device and the fan connector C2 are joined to the female connectors 83 and 84 provided on the housing 81. Unit 20 is completed.

  Further, the completed lamp unit 20 is assembled in the optical unit 10 and then stored in the lower housing 2 shown in FIGS. When housed in the lower housing 2, the suction guide portion 82 of the lamp housing 80 is joined to the intake duct 6 provided in the lower housing 2, and the exhaust duct of the lower housing 2 is connected to the discharge portion of the lamp housing 80. 7 is joined, and the attachment of the lamp unit 20 to the rear projection apparatus 1 is completed.

  When the suction fan 85 attached to the lamp housing 80 is operated, air outside the apparatus is taken in from the intake opening 2 b of the lower housing 2 and flows into the housing 81 through the intake duct 6. At this time, air flows through the gap between the housing 81 and the light source device 31, so that the air contacts the outer fin 44, the outer fin 62, and the outer fin 72 of the light source device 31 protruding in the gap over a wide area. . Further, since the heat inside the light source device 31 is transmitted to the outer fins 44 and the outer fins 62 and 72, the outer fins 44 and the outer fins 62 and 72 are in contact with the flowing air over a wide area, and the outer fins 44. , And the heat of the outer fins 62 and 72 is efficiently taken away by the air.

Embodiment 2. FIG.
The rear projection device according to the second embodiment is different from the rear projection device 1 according to the first embodiment in the configuration of the reflector heat dissipating unit, and does not include the inner wall member 50 and the back wall 70. It has the same members as the device.

  FIG. 6 is a perspective view showing a reflector heat radiating portion 91 according to the rear projection apparatus of the second embodiment. In the figure, the same parts as those of the rear projection apparatus of the first embodiment are denoted by the same reference numerals.

The reflector heat radiating portion 91 is provided on the rear end side of the reflector covering portion 91a and the reflector covering portion 91a that covers approximately one-half of the back surface of the reflector 22, and so as to surround the cylindrical portion 22d and the block member 25. A cylindrical extending portion 91b extending to the end side and a back plate portion 91c continuously provided so as to close the rear end surface of the extending portion 91b are provided. Inner fins 91d, 91d... Extending in the horizontal direction are juxtaposed inside the back plate portion 91c, and outer fins 91e, 91e... Extending in the horizontal direction are juxtaposed outside the back plate portion 91c. Yes. A window 91f is provided on the side facing the one side wall 30a of the extension portion 91b, and the power supply line d that is conductively connected to the light emitter 24 is drawn out of the extension portion 91b from the window 91f. ing.
The reflector heat radiating portion 91 is integrally formed by aluminum die casting.
In this embodiment, a back plate portion 91 c is fitted into the housing 31 instead of the back wall 70.

  In the present embodiment, since the extending portion 91b is connected to the back plate portion 91c, the heat conducted from the reflector 22 to the reflector covering portion 91a is satisfactorily transmitted to the back plate portion 91c via the extending portion 91b. Conducted and radiated from the back plate 91c.

Embodiment 3 FIG.
The rear projection device according to the third embodiment is different from the rear projection device 1 according to the first embodiment in the configuration of the reflector heat dissipating unit, and does not include the inner wall member 50 and the back wall 70. It has the same members as the device.

  FIG. 7 is a perspective view showing a reflector heat radiating portion 92 according to the rear projection apparatus of the third embodiment.

The reflector heat dissipating portion 92 includes a reflector covering portion 92a that covers approximately a half of the back surface of the reflector 22, a heat dissipating portion fins 92b, 92b,... Provided on the outer surface of the reflector covering portion 92a and extending in the vertical direction. A cylindrical extension portion 92c that is provided on the rear end side of the portion 92a and extends to the rear end side so as to surround the cylindrical portion 22d and the block member 25, and a rear end surface of the extension portion 92c that is continuously provided. And a back plate portion 92d. Inner fins 92e, 92e,... Extending in the horizontal direction are arranged in parallel inside the back plate portion 92d, and outer fins 92f, 92f, etc. extending in the horizontal direction are arranged in parallel outside the back plate portion 92d. Yes. A window 92g is provided on the side facing the one side wall 30a of the extending portion 92c, and the power supply line d that is conductively connected to the light emitter 24 is drawn out of the extending portion 92c from the window 92g. ing.
The reflector heat radiating portion 92 is integrally formed by aluminum die casting.
In the present embodiment, a back plate portion 92 d is fitted into the housing 31 instead of the back wall 70.

  In the present embodiment, a plurality of heat radiating portion fins 92b extending in the vertical direction are provided on the outer surface of the reflector covering portion 92a. Therefore, the reflector covering portion 92a is effectively cooled in a state where the contact area with the ascending airflow is increased along the extending direction of the heat radiating portion fins 92b.

  The reflector heat radiating portion 92 is not limited to being integrally formed. The extending portion 92c is separated from the back plate portion 92d, the reflector heat radiating portion 92 is surrounded by the inner wall member 50, and the extending portion 92c is A configuration in which the second inner wall 52 of the inner wall member 50 is in contact with the back plate portion 92d is also possible. Further, the heat dissipating part fins 92b are not limited to being provided on the outer surface of the reflector covering part 92a, and may be provided on the outer surface of the extending part 92c.

Embodiment 4 FIG.
The rear projection apparatus according to the fourth embodiment is different from the rear projection apparatus 1 according to the first embodiment in the configuration of the reflector heat dissipating unit, and does not include the inner wall member 50 and the back wall 70. It has the same members as the device.

  FIG. 8 is a perspective view showing a reflector heat dissipating section 93 according to the rear projection apparatus of the fourth embodiment.

The reflector heat dissipating portion 93 is provided on the rear end side of the reflector covering portion 93a and the reflector covering portion 93a that covers approximately a half of the back surface of the reflector 22, and so as to surround the cylindrical portion 22d and the block member 25. Horizontal plate portions 93b and 93b extending to the end side, and a back plate portion 93c provided with end surfaces of the horizontal plate portions 93b and 93b are provided. Inner fins 93d, 93d... Extending in the horizontal direction are juxtaposed inside the back plate portion 93c, and outer fins 93e, 93e... Extending in the horizontal direction are juxtaposed on the outer side of the back plate portion 93c. Yes.
The reflector heat radiating portion 93 is integrally formed by aluminum die casting.
In this embodiment, a back plate portion 93 d is fitted into the housing 31 instead of the back wall 70.

  In the present embodiment, since the horizontal plate portion 93b is connected to the back plate portion 93c, the heat conducted from the reflector 22 to the reflector covering portion 93a is satisfactorily transmitted to the back plate portion 93c via the horizontal plate portion 93b. Conducted and radiated well from the back plate portion 93c.

The number of horizontal plate portions 93b is not limited to two as long as the cylindrical portion 22d of the reflector 22 and the block member 25 can be arranged between the horizontal plate portions 93b.
Further, the reflector heat dissipating portion 93 is not limited to being integrally formed, the horizontal plate portion 93b is separated from the back plate portion 93c, the reflector heat dissipating portion 93 is surrounded by the inner wall member 50, and the horizontal plate portion 93b is A configuration in which the second inner wall 52 of the inner wall member 50 is in contact with the back plate portion 93c is also possible.

Embodiment 5. FIG.
The rear projection device according to the fifth embodiment is different from the rear projection device 1 according to the first embodiment in the configuration of the reflector heat dissipating unit, and does not include the inner wall member 50 and the other side wall 60. It has the same members as the device.

  FIG. 9 is a perspective view showing a reflector heat dissipating section 94 according to the rear projection apparatus of the fifth embodiment.

The reflector heat dissipating portion 94 is provided on the rear end side of the reflector covering portion 94a and the reflector covering portion 94a that covers approximately one-half of the back surface of the reflector 22, and is disposed so as to surround the cylindrical portion 22d and the block member 25. A cylindrical extension portion 94b extending to the end side, a side plate portion 94c provided on the side of the extension portion 94b, an inner surface of the side plate portion 94c, and extending in the horizontal direction to be connected to the extension portion 94b. Fins 94d, 94d... The fin 94d provided at a position on the inner surface of the side plate portion 94c that is not connected to the extended portion 94b has a shorter depth. Outer fins 94e, 94e,... Are juxtaposed on the outside of the side plate portion 94c. A window 94f is provided on the side facing the one side wall 30a of the extended portion 94b, and the power supply line d conductively connected to the light emitter 24 is drawn out of the extended portion 94b from the window 94f. ing.
The reflector heat radiating portion 94 is integrally formed by aluminum die casting.

In the present embodiment, since the extending portion 94b is connected to the side plate portion 94c, the heat conducted from the reflector 22 to the extending portion 94b is favorably conducted to the side plate portion 94c through the fins 94d. Heat is radiated from the side plate portion 94c.
The reflector heat dissipating portion 94 is not limited to being integrally formed. The fin 94d is separated from the side plate portion 94c, the reflector heat dissipating portion 94 is surrounded by the inner wall member 50, and the fin 94d is the second member of the inner wall member 50. It is also possible to adopt a configuration in which the side plate portion 94c is brought into contact with the first inner wall 51.

Embodiment 6 FIG.
The rear projection apparatus according to the sixth embodiment has the same members as those of the rear projection apparatus according to the first embodiment except that the configuration of the rear projection apparatus 1 according to the first embodiment and the reflector heat dissipating unit are different.

FIG. 10 is a perspective view showing a reflector heat radiating portion 95 according to the rear projection apparatus of the sixth embodiment.
The reflector heat radiating portion 95 is provided on the rear end side of the reflector covering portion 95a and the reflector covering portion 95a that covers approximately one-half of the back surface of the reflector 22, and so as to surround the cylindrical portion 22d and the block member 25. A cylindrical extending portion 95b extending to the end side, a laterally extending contact portion 95c projecting on the outer surface of the extending portion 95b in the longitudinal direction of the extending portion 95b, and an extending portion And a window 95d provided on the side facing the one side wall 30a.
The reflector heat radiation part 95 is integrally formed by aluminum die casting.

  The reflector heat dissipating part 95 is in contact with the other side wall 60 with the laterally extending part 95c penetrating the first inner wall 51 of the inner wall member 50, and the extending part 95b penetrates the second inner wall 52 of the inner wall member 50. In this state, it is brought into contact with the back wall 70 and attached into the housing 31.

  In the present embodiment, since the extending portion 95 b is in contact with the back wall 70, the heat conducted from the reflector 22 to the extending portion 95 b is favorably radiated from the back wall 70. Further, since the laterally extending portion 95c is in contact with the other side wall 60, the heat conducted from the reflector 22 to the laterally extending portion 95c is radiated well from the other side wall 60, and the cooling efficiency is good.

  The light source device 30 may not have the inner wall member 50 and the reflector heat radiating portion 95 may be connected to at least one of the back wall 70 and the other side wall 60.

  Furthermore, the configuration according to the present invention can be applied to a projection type image display apparatus of a front projection type in addition to the rear projection type rear projection apparatus 1 shown in FIGS.

(A) is sectional drawing of the rear projection apparatus which concerns on embodiment of this invention, (b) is sectional drawing in the AA of (a). It is a disassembled perspective view of an optical unit. It is a disassembled perspective view of a light source device. It is sectional drawing of the light source device in the BB line of FIG. It is a perspective view from the inner surface side of the front wall of the state which removed the light source. It is a perspective view which shows the reflector thermal radiation part which concerns on Embodiment 2. FIG. It is a perspective view which shows the reflector thermal radiation part which concerns on Embodiment 3. FIG. It is a perspective view which shows the reflector thermal radiation part which concerns on Embodiment 4. FIG. It is a perspective view which shows the reflector thermal radiation part which concerns on Embodiment 5. FIG. It is a perspective view which shows the reflector thermal radiation part which concerns on Embodiment 6. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear projection apparatus 10 Optical unit 20 Lamp unit 21 Light source 22 Reflector 22a, 22b Ventilation part 24 Luminescent body 29 Circulation fan 30 Light source device 31 Housing | casing 34 Back part 40 Front wall 42 Front part 43 Duct part 50 Inner wall member 51 1st inner wall 52 Second inner wall 53 Third inner wall 60 Other side walls 62, 72 Outer fins 63, 73 Inner fin 70 Back wall 80 Lamp housing 90, 91, 92, 93, 94, 95 Reflector heat radiating portion 90a, 91a, 92a, 93a, 94a , 95a Reflector covering portion 90b, 91b, 92c, 93b, 94b, 95b Extension portion 90c, 91f, 92g, 94f, 95d Window 92b Radiating portion fin 91c, 92d, 93c Back plate portion 91d, 92e, 93d Inner fin 91e, 92f, 93e, 94e Outer fin 94c Side plate part 94d Fin 95c Lateral extension part

Claims (12)

A light source having a light emitter that performs discharge light emission, and a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped storage box that stores the light source, and the storage box emits light emitted from the light source; In a light source device having a front wall having an opening to pass through, a back wall facing the front wall, and a side wall disposed on the side of the light source in the periphery,
A reflector heat-dissipating part having a reflector covering part that covers at least the center part side of the back face of the reflector, and an extending part that extends along the back surface of the reflector covering part so as to extend along the concave direction of the reflector; And
The light source device, wherein the extended portion is in contact with a back wall of the storage box facing an end surface of the extended portion.   The light source device according to claim 1, wherein the back wall has a plurality of wall fins on at least one of an outer surface and an inner surface of the back wall. A light source having a light emitter that performs discharge light emission, and a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped storage box that stores the light source, and the storage box emits light emitted from the light source; In a light source device having a front wall having an opening to pass through, a back wall facing the front wall, and a side wall disposed on the side of the light source in the periphery,
A reflector heat dissipating part having a reflector covering part covering at least the central part side of the back surface of the reflector;
The light source device, wherein the reflector heat radiating portion is connected to a side wall of the storage box facing a side portion of the reflector heat radiating portion.   The light source device according to claim 3, wherein the side wall includes a plurality of wall fins on at least one of an outer surface and an inner surface of the side wall. A light source having a light emitter that performs discharge light emission, and a concave reflector that reflects light emitted from the light emitter, and a rectangular parallelepiped storage box that stores the light source, and the storage box emits light emitted from the light source; In a light source device having a front wall having an opening to pass through, a back wall facing the front wall, and a side wall disposed on the side of the light source in the periphery,
A reflector heat-dissipating part having a reflector covering part that covers at least the center part side of the back face of the reflector, and an extending part that extends along the back surface of the reflector covering part so as to extend along the concave direction of the reflector; And
The extended portion is in contact with the back wall of the storage box facing the end surface of the extended portion,
The light source device, wherein the reflector heat radiating portion is connected to a side wall of the storage box facing a side portion of the reflector heat radiating portion.   The light source device according to claim 1, wherein the extending portion has a cylindrical shape.   6. The light source device according to claim 1, wherein the extending portion includes a plurality of plates extending along a recess direction of the reflector.   The light source device according to claim 1, wherein the reflector heat dissipating unit includes a plurality of heat dissipating unit fins extending in a vertical direction on an outer surface of the reflector heat dissipating unit.   The light source device according to claim 1, wherein the reflector heat radiating portion is formed integrally with the back wall.   The light source device according to claim 3, wherein the reflector heat radiating portion is formed integrally with the side wall. An inner wall facing the back wall of the storage box at an interval,
The light source device according to any one of claims 1 to 8, further comprising an inner wall member having an inner wall facing the side wall of the storage box with a space therebetween. A light source device according to any one of claims 1 to 11,
A spatial light modulation element that generates modulated light according to an image with light emitted from a light emitter included in the light source device;
A projection type image display apparatus comprising: a projection lens that projects the modulated light generated by the spatial light modulation element onto a projection target.

Images