Cooling structure of light source device and projector

Abstract

A cooling structure for a light source device is provided with: a light source unit (10); a heat dissipation plate section (21) having a placement surface (21a) on which the light source section is placed; a plurality of fins (22) arranged at intervals in a first direction along the back surface (21b) of the heat sink part; and a blower fan (7) that blows air toward the rear surface via the plurality of fins. The plurality of fins are provided with a cover section (23) which is provided to each first end section (221) of the plurality of fins in a second direction along the rear surface, and which covers a region corresponding to each front end section of the plurality of fins extending from the rear surface toward the blower fan in a gap between adjacent fins in the first direction. The plurality of first end portions do not protrude to the outside of a first edge portion (211) in the second direction of the heat dissipation plate portion. Openings (224) are formed at locations of the plurality of first ends corresponding to the respective base ends of the plurality of fins, the openings (224) having gaps between adjacent fins facing the outside of the plurality of fins.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a cooling structure of a light source device and a projector. BACKGROUND

[0002] A light source device in which fins are extended upward and downward from a holding member (heat sink portion) on which a light source portion is mounted is disclosed in Patent Literature 1.

[0003] [Patent Literature]

[0004] [Patent Literature]

[0005] [Patent Literature 1] Japanese Patent Application Publication No. 2020-144392 SUMMARY

[0006] [Problem to be Solved by the Invention]

[0007] However, due to miniaturization and the like of various devices including the light source device (for example, a projector), the fins cannot be extended upward and downward in some cases due to constraints on the space in which the light source device is disposed. In this case, cooling of the light source portion can be insufficient, and thus improvement in cooling efficiency of the light source portion is required.

[0008] The present utility model is completed in view of the above situation, and aims to provide a cooling structure of a light source device and a projector that can improve the cooling efficiency of the light source portion even when there are constraints on the space.

[0009] [Means for Solving the Problem]

[0010] The light source device cooling structure according to the first aspect of the present application includes: a light source unit; a heat sink unit formed in a plate shape and having a placement surface on which the light source unit is placed; a plurality of heat sink fins formed in a plate shape with a first direction as a plate thickness direction and arranged at intervals in the first direction, the first direction being a direction along a back surface of a side of the heat sink unit opposite to the placement surface; and a blowing fan arranged opposite to the back surface through the plurality of heat sink fins and blowing air toward the back surface. Each first end portion of the plurality of heat sink fins in a second direction orthogonal to the first direction along the back surface does not protrude outward of a first edge portion in the second direction of the heat sink unit. The plurality of heat sink fins include a cover portion provided to the plurality of first end portions and covering a region in a gap between adjacent heat sink fins in the first direction corresponding to each front end portion of the plurality of heat sink fins in an extension direction extending from the back surface toward the blowing fan. A region in the gap between the adjacent heat sink fins corresponding to each base end portion of the plurality of heat sink fins in the extension direction is not covered by the cover portion, and an opening portion is formed at a position in the plurality of first end portions corresponding to the plurality of base end portions, at which the gap between the adjacent heat sink fins faces outward of the plurality of heat sink fins.

[0011] The second aspect of the present application is a projector including the light source device cooling structure.

[0012] [Effects of the Invention]

[0013] According to the present application, even if there is a constraint on the space in which the light source device is arranged, the cooling efficiency of the light source unit can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a perspective view showing the appearance of a projector according to an embodiment of the present application.

[0015] Figure 2 is a perspective view showing a state in which an upper cover of a housing is removed from the projector of Figure 1 .

[0016] Figure 3 is a perspective view showing a state in which only a light source device, a blowing fan, and a duct constituting a light source device cooling structure remain on a bottom plate portion of the housing in the projector of Figure 2 .

[0017] Figure 4 is a perspective view showing a state in which the blowing fan and the duct are separated from the light source device in the projector of Figure 3 .

[0018] Figure 5 is a perspective view showing the light source device and the blowing fan in the projector of Figures 1-3 .

[0019] Figure 6 is a perspective view showing a state in which the housing of the optical system unit is removed in Figure 5 .

[0020] Figure 7 is a sectional view showing a cooling structure of the light source device in Figures 2-6 .

[0021] Figure 8 is a sectional view showing a modification of the cooling structure of the light source device. DETAILED DESCRIPTION

[0022] Hereinafter, an embodiment of the present application will be described with reference to Figures 1-7 An embodiment of the present application will be described.

[0023] As shown in Figures 1-3 , the projector 1 of the present embodiment is a device that projects image light (video image) onto a display surface such as a screen. The projector 1 has a light source device 3, an image light forming device 4, a projection device 5, a housing 6, a blowing fan 7, and a duct 8.

[0024] The image light forming device 4 generates image light based on light output from the light source device 3 described later. Although not shown, the image light forming device 4 has a light modulating element such as a DMD (Digital Micromirror Device), a liquid crystal panel, and an electronic component that controls the light modulating element.

[0025] The projection device 5 enlarges and projects the image light output from the image light forming device 4 onto a display surface such as a screen.

[0026] The housing 6 houses the light source device 3, the image light forming device 4, the projection device 5, the blowing fan 7, and the duct 8. The housing 6 has a bottom plate portion 61 that places the light source device 3, the image light forming device 4, the projection device 5, the blowing fan 7, and the duct 8, and an upper cover portion 62 that covers the light source device 3, the image light forming device 4, the projection device 5, the blowing fan 7, and the duct 8 from above.

[0027] Figures 3-7 The light source device 3, the blowing fan 7, and the duct 8 shown in constitute a cooling structure of the light source device 3 that cools the light source portion 10 of the light source device 3 described later.

[0028] Figures 5-7 As shown in

[0029] Figure 6 , Figure 7The light source unit 10 shown emits light. The light source device 3 of this embodiment has multiple (four in the example shown) light source units 10. Each light source unit 10 has a substrate 11 and a light-emitting element 12 mounted on the substrate 11. The light-emitting element 12 can be, for example, an LED (Light Emitting Diode), but in this embodiment it is a laser diode. The light-emitting element 12 of this embodiment emits laser light in the blue wavelength region. That is, the light source unit 10 of this embodiment is a laser substrate. The number of light-emitting elements 12 included in the light source unit 10 can be two as shown in the example, but is not limited to this.

[0030] The heat dissipation section 20 is used to cool the light source section 10 and has a heat dissipation plate section 21, multiple heat dissipation fins 22 and an extended heat dissipation section 24.

[0031] The heat sink portion 21 is formed as a plate having a mounting surface 21a and a back surface 21b facing the side opposite to the mounting surface 21a. The mounting surface 21a and the back surface 21b are formed to be substantially flat and substantially parallel to each other.

[0032] exist Figures 3-7 In this diagram, the X-axis represents a first direction along the mounting surface 21a and the back surface 21b, and the Y-axis represents a second direction orthogonal to the first direction along the mounting surface 21a and the back surface 21b. Additionally, the Z-axis represents an orthogonal direction orthogonal to the mounting surface 21a and the back surface 21b. The Z-axis corresponds to the thickness direction of the heat sink portion 21.

[0033] like Figure 6 , Figure 7 As shown, the aforementioned light source portion 10 is mounted on the mounting surface 21a. Specifically, a substrate 11 of the light source portion 10 is disposed overlapping the mounting surface 21a. The substrate 11 can be in direct contact with the mounting surface 21a, but, for example, a thermally conductive grease can be placed between the substrate 11 and the mounting surface 21a to improve heat transfer from the substrate 11 to the heat dissipation portion 20. The heat dissipation plate portion 21 is made of a highly conductive material such as copper.

[0034] With the light source unit 10 placed on the mounting surface 21a, the light generated in the light-emitting element 12 of the light source unit 10 is mainly directed away from the mounting surface 21a (in the example shown, the positive Z-axis direction). Figure 7 In the diagram, arrows LD1 and LD2 indicate the direction of light travel emitted from the light source unit 10.

[0035] In this embodiment, the light source section 10 placed on the mounting surface 21a has a first light source section 10A and a second light source section 10B. The first light source section 10A is located on the first edge 211 (the end on the positive Y-axis direction side) side of the heat sink section 21 in the second direction. The second light source section 10B is located on the second edge 212 (the end on the negative Y-axis direction side) side of the heat sink section 21 in the second direction.Figure 6 The first and second light source portions 10A and 10B are each arranged with two light sources in the first direction, but are not limited thereto.

[0036] The plurality of fins 22 are mainly provided on the back surface 21b of the heat sink plate portion 21. The plurality of fins 22 are each formed in a plate shape with a first direction along the back surface 21b of the heat sink plate portion 21 as a plate thickness direction. In addition, each of the plurality of fins 22 extends in a second direction along the back surface 21b of the heat sink plate portion 21, and extends from the back surface 21b in an orthogonal direction (Z-axis direction) orthogonal to the back surface 21b. The plurality of fins 22 are arranged at intervals in the first direction.

[0037] Each first end portion 221 (hereinafter, also referred to as "plurality of first end portions 221") of the plurality of fins 22 in the second direction does not protrude outward of the first edge portion 211 of the heat sink plate portion 21 in the second direction. Specifically, the plurality of first end portions 221 and the first edge portion 211 of the heat sink plate portion 21 are arranged at the same position in the second direction. In the illustrated example, the plurality of first end portions 221 and the first edge portion 211 of the heat sink plate portion 21 are end portions of the fins 22 and the heat sink plate portion 21 on the positive Y-axis direction side.

[0038] On the other hand, each second end portion 222 (hereinafter, also referred to as "plurality of second end portions 222") of the plurality of fins 22 on the side opposite the plurality of first end portions 221 in the second direction protrudes outward of the second edge portion 212 of the heat sink plate portion 21 in the second direction.

[0039] As shown in Figs. 1 and 2, the plurality of fins 22 include a plurality of first end portions 221 and a plurality of second end portions 222. The plurality of first end portions 221 are each located on the side of the heat sink plate portion 21 closer to the back surface 21b of the heat sink plate portion 21. The plurality of second end portions 222 are each located on the side of the heat sink plate portion 21 farther from the back surface 21b of the heat sink plate portion 21. Figure 6 Figure 7 As shown in Figs. 1 and 2, the plurality of fins 22 include a plurality of first end portions 221 and a plurality of second end portions 222. The plurality of first end portions 221 are each located on the side of the heat sink plate portion 21 closer to the back surface 21b of the heat sink plate portion 21. The plurality of second end portions 222 are each located on the side of the heat sink plate portion 21 farther from the back surface 21b of the heat sink plate portion 21.

[0040] The cover portion 23 does not cover a region in the gap between adjacent fins 22 corresponding to each base end portion of the plurality of fins 22 (hereinafter, referred to as "each base end portion of the plurality of fins 22"). Thus, an opening portion 224 in which a gap between adjacent fins 22 faces outward of the plurality of fins 22 is formed at a position in each first end portion 221 of the plurality of fins 22 corresponding to each base end portion of the plurality of fins 22.

[0041] ​The cover portion 23 of the present embodiment is formed in each fin 22 and functions as a linking portion (stacking portion) that links adjacent fins 22 when a plurality of fins 22 are stacked and assembled. For example, the cover portion 23 formed in a prescribed fin 22 ensures a gap of the prescribed fin 22 from other fins 22 by engaging with the other fins 22 adjacent to the prescribed fin 22, and links the prescribed fin 22 with the other fins 22.

[0042] As shown in Figure 5 , Figure 6 , the extended heat radiating portion 24 extends from both ends of the heat sink portion 21 in the first direction. In addition, the extended heat radiating portion 24 may, for example, extend from only one end of the heat sink portion 21 in the first direction. The extended heat radiating portion 24 is configured to radiate heat by causing air to flow in the orthogonal direction (Z-axis direction) orthogonal to the placement surface 21a with respect to the extended heat radiating portion 24.

[0043] The extended heat radiating portion 24 has a heat pipe 241 and a plurality of fins 242 mounted to the heat pipe 241. The heat pipe 241 extends from the end portion of the heat sink portion 21 in the first direction. The heat pipe 241 extends from both ends of the heat sink portion 21 in the first direction by penetrating the heat sink portion 21 in the first direction (see Figure 7 ). The heat pipe 241 is arranged with a plurality of (seven in the illustrated example) in the second direction.

[0044] The plurality of fins 242 of the extended heat radiating portion 24 are each formed in a plate shape with the first direction as the thickness direction. The plurality of fins 242 are arranged at intervals in the first direction on both sides of the heat sink portion 21 in the first direction. The heat pipe 241 is mounted to the plurality of fins 242 in a manner that penetrates the fins 242 in the thickness direction thereof.

[0045] In the extended heat radiating portion 24 thus configured, air can flow in the orthogonal direction (Z-axis direction) between the plurality of fins 242.

[0046] By the heat radiating portion 20 having the extended heat radiating portion 24, the light source portion 10 can be cooled with high efficiency.

[0047] As shown in Figures 5-7 , the optical system unit 30 is disposed on the placement surface 21a side of the heat sink portion 21 in which the light source portion 10 is disposed. The optical system unit 30 emits white light toward the image light forming device 4 by appropriately processing light (blue light) from the light source portion 10. The optical system unit 30 has a plurality of optical system components 31 for appropriately processing light from the light source portion 10 and a housing 32 that houses the optical system components 31.

[0048] The optical system component 31 includes a mirror 31A, a lens 31B, and the like. The mirror 31A reflects light traveling in the orthogonal direction (Z-axis positive direction) from the first light source portion 10A located at a position shifted in the second direction (Y-axis positive direction) with respect to the second light source portion 10B. Thus, the light of the first light source portion 10A advances in the orthogonal direction (Z-axis positive direction) in the vicinity of the light of the second light source portion 10B. In Figure 7 In the drawing, an arrow LD1 indicates a direction in which light emitted from the first light source portion 10A travels, and an arrow LD2 indicates a direction in which light emitted from the second light source portion 10B travels. The lens 31B, for example, condenses light from the first and second light source portions 10A and 10B.

[0049] Figure 5 The housing 32 of the optical system unit 30 illustrated has an opening (not illustrated) through which light emitted from the light source portion 10 is incident to the inside of the housing 32. By bringing the edge of the opening of the housing 32 in close contact with the region around the light source portion 10 in the placement surface 21a, it is possible to cover the light source portion 10 with the housing 32. Thus, it is possible to suppress or prevent dust on the outside of the housing 32 from reaching the light source portion 10.

[0050] As illustrated in Figures 5-7 , the air supply fan 7 is arranged opposite the back surface 21b of the heat sink plate portion 21 with the plurality of heat sink fins 22 interposed therebetween, and mainly supplies air toward the back surface 21b of the heat sink plate portion 21. The air supply fan 7 is arranged so as to also be opposite the extended heat sink portion 24. The air supply fan 7 is located on the Z-axis negative direction side with respect to the plurality of heat sink fins 22 and the extended heat sink portion 24. The air supply fan 7 supplies air toward the Z-axis positive direction with respect to the plurality of heat sink fins 22 and the extended heat sink portion 24.

[0051] As illustrated in Figure 4 , Figure 7 , the air supply fan 7 of the present embodiment is an axial fan having a shaft portion 71 and a blade portion 72 arranged around the shaft portion 71. The axis of the shaft portion 71 of the air supply fan 7 is oriented in the direction of extension (Z-axis direction) of the heat sink fin 22 extending from the back surface 21b of the heat sink plate portion 21 toward the air supply fan 7.

[0052] As illustrated in Figure 7 , the shaft portion 71 is located at a position corresponding to the second light source portion 10B in the second direction. In addition, the blade portion 72 is located at a position corresponding to the first light source portion 10A and each of the second end portions 222 of the plurality of heat sink fins 22 in the second direction. That is, the shaft portion 71 and the second light source portion 10B are arranged in the orthogonal direction (Z-axis direction), and the blade portion 72 and the first light source portion 10A and the plurality of second end portions 222 are arranged in the orthogonal direction.

[0053] In this embodiment, the size of the air supply fan 7 in the second direction is approximately the same as the size of the heat dissipation unit 20 in the second direction. Furthermore, the size of the air supply fan 7 in the first direction is approximately equal to the size of the heat dissipation unit 20 in the first direction.

[0054] like Figure 3 , Figure 4 , Figure 7 As shown, the conduit 8 extends from the air supply fan 7 toward the plurality of heat sinks 22 and the extended heat dissipation section 24, thereby defining a flow path from the air supply fan 7 to the plurality of heat sinks 22 and the extended heat dissipation section 24. In this embodiment, the conduit 8 is formed as a cylinder surrounding the air supply fan 7 and the heat dissipation section 20. The conduit 8 mainly surrounds the entire air supply fan 7 and the portion of the heat dissipation section 20 on the side of the air supply fan 7. In addition, a portion of the conduit 8 may, for example, be formed by the wall of the housing (e.g., the bottom plate 61).

[0055] like Figure 7 As shown, the portion 81 of the pipe 8 located on each of the first ends 221 of the plurality of heat sinks 22 (hereinafter referred to as the first portion 81 of the pipe 8) is formed so as not to cover the opening 224 formed on the plurality of first ends 221.

[0056] Specifically, a ventilation opening 82 is formed at the first portion 81 of the pipe 8, such that the opening 224 faces the outside of the plurality of heat sinks 22. In this embodiment, the shape of the ventilation opening 82 viewed from the second direction corresponds to the shape of the opening 224. That is, the edge 821 of the ventilation opening 82 on the side of the air supply fan 7 (negative Z-axis direction) in the orthogonal direction (hereinafter referred to as the first edge 821 of the ventilation opening 82) is orthogonally positioned to correspond to the edge 231 of the heat sink portion 21 on the side of the cover portion 23 in the orthogonal direction (hereinafter referred to as the first edge 231 of the cover portion 23). In addition, the edge 822 of the ventilation opening 82 on the side of the heat sink portion 21 (negative Z-axis direction) in the orthogonal direction (second edge 822 of the ventilation opening 82) is orthogonally positioned to correspond to the back surface 21b of the heat sink portion 21.

[0057] In the cooling structure of the light source device 3 and the projector 1 including the cooling structure according to the present embodiment, the cover portion 23 is provided at positions in the first end portions 221 of the plurality of fins 22 in the second direction (Y-axis direction) corresponding to the respective front end portions of the plurality of fins 22 in the extension direction (Z-axis negative direction) of the plurality of fins 22. Thus, it is possible to prevent the flow of air from the air supply fan 7 toward the back surface 21b of the heat sink portion 21 from escaping to the outside from the gaps between the plurality of fins 22 in the respective front end portions of the plurality of fins 22 in the second direction. As a result, it is possible to efficiently cause the air flowing from the air supply fan 7 to reach the back surface 21b of the heat sink portion 21. Figure 7 The arrow FD1 in FIG. 10 schematically indicates the direction of the flow of air from the air supply fan 7 to the back surface 21b of the heat sink portion 21.

[0058] In addition, the opening portion 224 is formed in the portion corresponding to the respective base end portion side (the side close to the back surface 21b of the heat sink portion 21) of the plurality of fins 22, so that the gaps between the plurality of fins 22 are not covered by the cover portion 23 and face the outside. Thus, it is possible to cause the air reaching the back surface 21b of the heat sink portion 21 to flow to the outside from the gaps between the plurality of fins 22 through the opening portion 224. As a result, it is possible to efficiently release the heat of the light source portion 10 placed on the heat sink portion 21. Figure 7 The arrow FD2 in FIG. 11 schematically indicates the direction of the flow of air reaching the back surface 21b of the heat sink portion 21 to the outside through the opening portion 224.

[0059] According to the above, it is possible to improve the cooling efficiency of the light source portion 10 even if there is a constraint on the space in which the light source device 3 is placed.

[0060] In addition, in the cooling structure of the light source device 3 and the projector 1 including the cooling structure according to the present embodiment, the duct 8 is provided to form a flow path from the air supply fan 7 to the plurality of fins 22. Thus, even if the air supply fan 7 is arranged apart from the plurality of fins 22 by a gap, it is possible to suppress the case where air escapes to the outside from the gaps between the air supply fan 7 and the plurality of fins 22. As a result, it is possible to efficiently cause the air flowing from the air supply fan 7 to reach the plurality of fins 22.

[0061] In addition, in the cooling structure of the light source device 3 and the projector 1 including the cooling structure according to the present embodiment, the portion of the duct 8 covering the cover portion 23 does not cover the opening portion 224. As a result, it is possible to prevent the duct 8 from obstructing the flow of air from the air supply fan 7 reaching the back surface 21b of the heat sink portion 21 to the outside from the gaps between the plurality of fins 22.

[0062] Further, in the cooling structure of the light source device 3 and the projector 1 including the cooling structure according to the present embodiment, the first end portions 221 of the plurality of fins 22 in the second direction are provided with the cover portions 23 described above. Therefore, on the side of the plurality of first end portions 221, the heat transferred from the light source portion 10 to the first edge portion 211 of the heat sink portion 21 can be diffused by the air flowing from the air supply fan 7 to the outside through the opening portions 224 via the back surface 21b of the heat sink portion 21.

[0063] On the other hand, the second end portions 222 of the plurality of fins 22 in the second direction protrude from the second edge portion 212 of the heat sink portion 21 in the second direction (negative direction of the Y axis). Therefore, on the side of the plurality of second end portions 222, the heat transferred from the light source portion 10 to the second edge portion 212 of the heat sink portion 21 can be transferred to the larger portions (i.e., the plurality of second end portions 222) of the plurality of fins 22 protruding to the outside of the second edge portion 212 of the heat sink portion 21, and diffused by the air flowing from the air supply fan 7. Figure 7 The arrow FD3 in FIG. 10 indicates the direction of the air flowing from the air supply fan 7 through the plurality of second end portions 222.

[0064] According to the above, the heat of the light source portion 10 can be efficiently diffused.

[0065] Further, in the cooling structure of the light source device 3 and the projector 1 including the cooling structure according to the present embodiment, the first light source portion 10A on the side of the first edge portion 211 of the heat sink portion 21 in the second direction is located in the second direction at a position corresponding to the blade portion 72 of the air supply fan 7. Therefore, by the air flowing from the blade portion 72 of the air supply fan 7 to the outside after passing through the position on the side of the first edge portion 211 of the heat sink portion 21 overlapping the first light source portion 10A from the opening portion 224 (see arrows FD1, FD2 of FIG. 9), the heat of the first light source portion 10A can be diffused. Figure 7

[0066] On the other hand, the second light source portion 10B on the side of the second edge portion 212 of the heat sink portion 21 in the second direction is located in the second direction at a position corresponding to the shaft portion 71 of the air supply fan 7. Therefore, the air flowing from the air supply fan 7 is less likely to reach the position on the side of the second edge portion 212 of the heat sink portion 21 overlapping the second light source portion 10B. However, the second end portions 222 of the plurality of fins 22 protruding in the second direction from the second edge portion 212 of the heat sink portion 21 are located in the second direction at a position corresponding to the blade portion 72 of the air supply fan 7. Therefore, the heat of the second light source portion 10B transferred to the larger portions (i.e., the plurality of second end portions 222) of the fins 22 protruding to the outside of the second edge portion 212 of the heat sink portion 21 can be diffused by the air flowing from the air supply fan 7.

[0067] ​According to the above, even if the air supply fan 7 is an axial fan, the case that the heat diffusion of the first and second light source portions 10A, 10B becomes uneven can be suppressed.

[0068] The embodiments of the present application have been described above, but the present application is not limited to the above-described embodiments, and can be appropriately changed without departing from the gist thereof.

[0069] In the present application, for example, as shown in Figure 8 The first portion 81 of the duct 8 can also be formed so as to cover a part of the opening portion 224 formed by each first end portion 221 of the plurality of fins 22.

[0070] In the structure exemplified in Figure 8 In the structure exemplified in

[0071] In the structure exemplified in Figure 8 In the structure exemplified in

[0072] In addition, in the structure exemplified in Figure 8 In the structure exemplified in

[0073] In the present application, the heat dissipation portion 20 can also not be provided with the extended heat dissipation portion 24, for example.

[0074] [Legend]

[0075] 1 projector

[0076] 3 light source device

[0077] 7 air supply fan

[0078] 8 duct

[0079] 10 light source section

[0080] 10A first light source section

[0081] 10B second light source section

[0082] 20 heat dissipation section

[0083] 21 heat dissipation plate section

[0084] 21a placement surface

[0085] 21b back surface

[0086] 211 first edge section

[0087] 212 second edge section

[0088] 22 heat dissipation fin

[0089] 221 first end section

[0090] 222 second end section

[0091] 224 opening section

[0092] 23 cover section

[0093] 71 shaft section

[0094] 72 blade section

[0095] 81 first portion of duct 8

[0096] 82 ventilation opening

Claims

1. A cooling structure of a light source apparatus, characterized by comprising: a light source section; a heat sink section formed in a plate shape and having a placement surface on which the light source section is placed; a plurality of heat sink fins formed in a plate shape with a first direction as a plate thickness direction and arranged at intervals in the first direction, the first direction being a direction along a back surface of the heat sink section on a side opposite to the placement surface; and a blowing fan arranged opposite to the back surface with the plurality of heat sink fins interposed therebetween and blowing air toward the back surface, wherein each first end portion of the plurality of heat sink fins in a second direction orthogonal to the back surface and the first direction does not protrude outward of a first edge portion of the heat sink section in the second direction, wherein the plurality of heat sink fins have a cover section provided to the plurality of first end portions and covering regions corresponding to each front end portion of the plurality of heat sink fins in an extension direction extending from the back surface toward the blowing fan in a gap between adjacent heat sink fins in the first direction, and wherein regions corresponding to each base end portion of the plurality of heat sink fins in the extension direction in the gap between the adjacent heat sink fins are not covered by the cover section, thereby forming an opening portion at a position corresponding to the plurality of base end portions in the plurality of first end portions, at which the gap between the adjacent heat sink fins faces outward of the plurality of heat sink fins.

2. The cooling structure of a light source apparatus according to claim 1, characterized in that the cooling structure of a light source apparatus has a duct extending from the blowing fan toward the plurality of heat sink fins and dividing a flow path from the blowing fan to the plurality of heat sink fins, and wherein a portion of the duct on a side of the plurality of first end portions is formed not to cover the opening portion.

3. The cooling structure of a light source apparatus according to claim 1, characterized in that the cooling structure of a light source apparatus has a duct extending from the blowing fan toward the plurality of heat sink fins and dividing a flow path from the blowing fan to the plurality of heat sink fins, and wherein a portion of the duct on a side of the plurality of first end portions is formed to cover a part of the opening portion.

4. The cooling structure of a light source apparatus according to claim 2 or 3, characterized in that the duct is formed with a ventilation opening facing outward of the plurality of heat sink fins at the opening portion.

5. The cooling structure of a light source apparatus according to any one of claims 1 to 3, characterized in that each second end portion of the plurality of heat sink fins in the second direction protrudes outward of a second edge portion of the heat sink section in the second direction.

6. The cooling structure of a light source apparatus according to claim 5, characterized in that the plurality of second end portions are located on an opposite side of the plurality of first end portions in the second direction.

7. The cooling structure of a light source apparatus according to claim 5, characterized in that the light source section has a first light source section on a side of the first edge portion and a second light source section on a side of the second edge portion.

8. The cooling structure of a light source apparatus according to claim 7, characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The air supply fan is a axial flow fan having a shaft portion with an axis directed toward the elongated direction and a blade portion disposed around the shaft portion, In the second direction, the shaft portion is located at a position corresponding to the second light source portion, and the blade portion is located at positions corresponding to the first light source portion and the plurality of second end portions.

9. A projector comprising the cooling structure of the light source device according to any one of claims 1 to 3.

Images