Light source device and projector

Abstract

The invention relates to a light source device and a projector, which can ensure the cooling efficiency of a light source and a wavelength conversion device and realize miniaturization at the same time. The light source device includes: a light source that emits light; a heat dissipation member that dissipates heat of the light source; a wavelength conversion device that converts the wavelength of the light emitted from the light source; a housing housing having a housing space in which the light source and the wavelength conversion device are housed; and a heat transfer member which is provided in the housing housing, forms a part of the outer surface of the housing housing, and is thermally connected to the wavelength conversion device, the heat dissipation member having: a substrate to which heat of the light source is transferred; and a plurality of fins disposed on the substrate, the substrate having a flow port penetrating the substrate and allowing a portion of the air flow flowing to the heat dissipation member to flow to the heat transfer member.

Description

TECHNICAL FIELD

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

[0002] Conventionally, a light source device having a light source and a phosphor is known (see Patent Documents 1 and 2, for example).

[0003] The light source device described in Patent Document 1 includes a solid light source, a light source heat sink, a phosphor portion, a motor, a phosphor heat sink, a first suction fan, a first exhaust fan, and a second suction fan.

[0004] The solid light source has a first light source and a second light source, and a light source heat sink is arranged on a surface of each light source opposite to a light emitting surface. With respect to the light source heat sink, the first suction fan is arranged on an upstream side in a flow direction of first cooling air, and the first exhaust fan is arranged on a downstream side.

[0005] The phosphor portion has a wheel, a phosphor coated in a circular arc shape on the wheel, and a light transmitting member on which the phosphor is not coated in the wheel, and is rotated by the motor. The phosphor portion is fixed to a cover member of an optical system case that accommodates an optical system, and is covered by a phosphor housing. The phosphor heat sink is arranged on both sides sandwiching the phosphor housing, and with respect to the phosphor heat sink, the second suction fan is arranged on an upstream side in a flow direction of second cooling air.

[0006] The light source device described in Patent Document 2 includes a light source portion, a converging lens, a fluorescent plate wheel, a driving motor, and a cooling device. Blue light emitted from the light source portion is converged by the converging lens and is incident on the fluorescent plate wheel that is rotated by the driving motor. On an exit side surface of the fluorescent plate wheel, concentrically circularly formed are a phosphor region including a green phosphor, a phosphor region including a red phosphor, and a blue transmission region, and green light, red light, and blue light are emitted from the fluorescent plate wheel in time division.

[0007] The cooling device includes a heat pipe connected to a substrate of the light source portion, a plurality of fins that cool the heat pipe, and a fan, and a part of the fluorescent wheel is arranged between the fins. Air as a cooling medium on the arrangement side of the fluorescent wheel is drawn by the fan and flows through the fins. Thus, the fluorescent wheel and the plurality of fins are cooled, and further, the fluorescent wheel and the light source portion are cooled.

[0008] Patent Document 1: Japanese Patent Application Publication No. 2022-024355

[0009] Patent Document 2: Japanese Patent Application Publication No. 2016-051073

[0010] However, in the light source device described in Patent Document 1, the solid-state light source and the phosphor portion are cooled by a cooling mechanism provided separately, and thus, although the solid-state light source and the phosphor portion can be efficiently cooled, respectively, the light source device is likely to be large-sized.

[0011] Therefore, as described in Patent Document 2, it is considered to arrange the phosphor wheel and the plurality of fins in the flow path of the cooling medium drawn by the fan.

[0012] However, in such a structure, the cooling medium that has cooled the phosphor wheel on the upstream side in the flow path of the cooling medium drawn by the fan flows into a part of the plurality of fins. Thus, there is a problem in that the cooling efficiency of the plurality of fins, that is, the cooling efficiency of the light source portion is likely to be low. On the other hand, when the cooling efficiency of each of the light source portion and the phosphor wheel is to be ensured, the plurality of fins and the fan are required to be large-sized, and thus, there is a problem in that the light source device is likely to be large-sized.

[0013] Therefore, a structure of a light source device that can achieve the downsizing of the entire device while ensuring the cooling efficiency of each of the light source and the phosphor is desired. SUMMARY

[0014] The light source device of the first aspect of the present disclosure includes a light source that emits light, a heat dissipation member that dissipates heat of the light source, a wavelength conversion device that converts a wavelength of the light emitted from the light source, a housing that has a housing space that houses the light source and the wavelength conversion device, and a heat transfer member that is provided to the housing and constitutes a part of an outer surface of the housing, is thermally connected to the wavelength conversion device, and has a substrate to which heat of the light source is transferred and a plurality of fins arranged to the substrate, the substrate having a flow passage that penetrates the substrate and causes a part of an air current flowing to the heat dissipation member to flow to the heat transfer member.

[0015] The projector of the second aspect of the present disclosure includes the light source device of the first aspect described above, a light modulation device that modulates the light emitted from the light source device, a projection optical device that projects the light modulated by the light modulation device, and a fan that causes an air current to flow to the heat dissipation member. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view showing an appearance of a projector in one embodiment.

[0017] Figure 2 is a schematic view showing a structure of an image projection device in one embodiment.

[0018] Figure 3FIG. 1 is a schematic view showing the structure of a light source device in one embodiment.

[0019] Figure 4 FIG. 2 is a perspective view showing a wavelength conversion device and a heat transfer member in one embodiment.

[0020] Figure 5 FIG. 3 is a perspective view showing a light source device in one embodiment.

[0021] Figure 6 FIG. 4 is a perspective view showing a light source device in one embodiment.

[0022] Figure 7 FIG. 5 is an exploded perspective view showing a light source device in one embodiment.

[0023] Figure 8 FIG. 6 is an exploded perspective view showing a light source device in one embodiment.

[0024] Figure 9 FIG. 7 is an exploded perspective view showing a heat dissipation member in one embodiment.

[0025] Figure 10 FIG. 8 is an exploded perspective view showing a heat dissipation member in one embodiment.

[0026] Figure 11 FIG. 9 is a perspective view showing the arrangement of a light source device and a fan in one embodiment.

[0027] Figure 12 FIG. 10 is a side view showing a light source device and a fan in one embodiment.

[0028] Figure 13 FIG. 11 is a view showing the positional relationship between a flow passage of a substrate and a fan in one embodiment.

[0029] Figure 14 FIG. 12 is a view showing the positional relationship between a flow passage of a substrate and a heat pipe and a fin in one embodiment.

[0030] Figure 15 FIG. 13 is a view showing the air current sent out from a fan in one embodiment.

[0031] Figure 16 FIG. 14 is a view showing the air current sent out from a fan in one embodiment.

[0032] Explanation of Reference Numerals

[0033] 1 projector; 343, 343B, 343G, 343R light modulating device; 36 projection optical device; 4 light source device; 41 light source; 50 wavelength conversion device; 501 phosphor wheel; 502 rotating plate; 503 phosphor layer; 504 reflecting portion; 505 driving portion (motor); 6 frame for light source; 61 housing frame; 611 first surface (first outer surface); 612 second surface (second outer surface); 613 third surface (third outer surface); 62 lower frame; 62A housing recess; 63 cover member (metal member); 64 duct; 641 first duct portion; 642 second duct portion; 65 heat transfer member; 651 first surface (heat receiving surface); 652 connecting portion; 653 heat receiving column; 654 second surface (outer surface); 655 protruding portion; 656 heat radiating column; 657 rectifying portion; 66 discharge port; 7 heat radiating member; 71 base plate; 72 vapor cavity; 73 heat pipe; 731 heat receiving portion; 732 heat radiating portion; 74 heat sink; 75 fin; 76 air guiding member; SP housing space. DETAILED DESCRIPTION

[0034] Hereinafter, one embodiment of the present disclosure will be described based on the drawings.

[0035] [Outline structure of projector]

[0036] Figure 1 is a perspective view showing the appearance of the projector 1 of the present embodiment.

[0037] The projector 1 of the present embodiment is a display device that forms an image light corresponding to an image signal by modulating light emitted from a light source device, and projects the formed image light to a projection surface. As shown in Figure 1 , the projector 1 has an outer frame 2.

[0038] [Structure of outer frame]

[0039] The outer frame 2 has a front surface portion 21, a back surface portion 22, a top surface portion 23, a bottom surface portion 24, a right side surface portion 25, and a left side surface portion 26, and is formed in a substantially rectangular parallelepiped shape.

[0040] The front surface portion 21 has a projection port 211, a plurality of indicators 212, and a first introduction port 213. The projection port 211 exposes a part of a projection optical device 36 of the image projection device 3 described later. The plurality of indicators 212 are provided on the right side surface portion 25 side with respect to the projection port 211, and show the state of the projector 1. The first introduction port 213 is provided on the left side surface portion 26 side with respect to the projection port 211, and introduces air outside the housing frame 2 as cooling gas to the inside of the housing frame 2. Details are described later, and the fan 8 described later is arranged in the inside of the housing frame 2 corresponding to the first introduction port 213, and the cooling gas drawn by the fan 8 through the first introduction port 213 is sent as an air current to the light source device 4.

[0041] Two dials DA1, DA2 that operate lens moving mechanisms described later are exposed on the top surface portion 23.

[0042] A plurality of leg portions 241 that contact a setting surface on which the projector 1 is set are provided on the bottom surface portion 24.

[0043] Although detailed illustration is omitted, the right side surface portion 25 has a second introduction port that introduces air outside the housing frame 2 as cooling gas to the inside of the housing frame 2.

[0044] The left side surface portion 26 has three discharge ports 261, 262, 263.

[0045] The discharge port 261 is provided on the front surface portion 21 side in the left side surface portion 26. The discharge port 261 discharges an air current that flows in a heat sink 74 possessed by the light source device 4 described later.

[0046] The discharge port 262 is provided on the back surface portion 22 side in the left side surface portion 26. The discharge port 262 discharges an air current that is introduced from the second introduction port of the right side surface portion 25 to the inside of the housing frame 2 and cools a cooling object in the housing frame 2 after cooling.

[0047] The discharge port 263 is provided on the bottom surface portion 24 side between the discharge ports 261, 262 in the left side surface portion 26. The discharge port 263 discharges an air current that flows in a heat transfer member 65 possessed by the light source device 4 described later.

[0048] In addition, the flow of the air current that cools the heat sink 74 and the heat transfer member 65 sent from the fan 8 is described in detail later.

[0049] [Structure of image projection device]

[0050] Figure 2 is a schematic view showing the structure of the image projection device 3.

[0051] The projector 1 has the image projection device 3 housed in the inside of the housing frame 2.

[0052] The image projection apparatus 3 projects image light corresponding to an image signal. As shown in the figure, the image projection apparatus 3 has a light source apparatus 4, a uniformizing apparatus 31, a color separating apparatus 32, a relay apparatus 33, an image forming apparatus 34, a frame for optical components 35, and a projection optical apparatus 36, and a lens moving mechanism not shown. Figure 2

[0053] The light source apparatus 4 emits light. The structure of the light source apparatus 4 will be described later in detail.

[0054] The uniformizing apparatus 31 uniformizes the illuminance distribution of the light emitted from the light source apparatus 4. The light whose illuminance distribution is uniformized passes through the color separating apparatus 32 and the relay apparatus 33, and illuminates a modulation region of a light modulation apparatus 343 of the image forming apparatus 34 described later. The uniformizing apparatus 31 has two lens arrays 311, 312, a polarization conversion element 313, and a superposition lens 314.

[0055] The color separating apparatus 32 separates the light incident from the uniformizing apparatus 31 into red, green, and blue color lights. The color separating apparatus 32 is provided with two dichroic mirrors 321, 322 and a mirror 323 that reflects the blue color light separated by the dichroic mirror 321.

[0056] The relay apparatus 33 is provided in the light path of the red color light longer than the light paths of the other color lights, and suppresses the loss of the red color light. The relay apparatus 33 is provided with an incident-side lens 331, a relay lens 333, and mirrors 332, 334. In the present embodiment, the relay apparatus 33 is provided in the light path of the red color light. However, it is not limited thereto, and for example, the color light whose light path is longer than the other color lights can be the blue color light, and the relay apparatus 33 can be provided in the light path of the blue color light.

[0057] The image forming apparatus 34 forms image light from the light emitted from the light source apparatus 4. Specifically, the image forming apparatus 34 modulates the incident red, green, and blue color lights, synthesizes the modulated color lights, and forms image light. The image forming apparatus 34 has three field lenses 341, three incident-side polarizing plates 342, three light modulation apparatuses 343, three field angle compensation plates 344, and three exit-side polarizing plates 345, one color synthesizing element 346, provided according to the incident color light.

[0058] The light modulation apparatus 343 modulates the incident light according to image information. The light modulation apparatus 343 includes a light modulation apparatus 343R for red color light, a light modulation apparatus 343G for green color light, and a light modulation apparatus 343B for blue color light. In the present embodiment, the light modulation apparatus 343 is constituted by a transmissive liquid crystal panel, and a liquid crystal light valve is constituted by the incident-side polarizing plate 342, the light modulation apparatus 343, and the exit-side polarizing plate 345. ​

[0059] The color-combining element 346 combines the respective color lights modulated by the light-modulating devices 343B, 343G, 343R to form an image light. In the present embodiment, the color-combining element 346 is constituted by a cross dichroic prism, but is not limited thereto, and may, for example, be constituted by a plurality of dichroic mirrors.

[0060] The optical member frame 35 houses the above-described respective devices 31 to 34 therein. In addition, an optical design axis, i.e., an illumination optical axis Ax, is set in the image projection device 3, and the optical member frame 35 holds the respective devices 31 to 34 at prescribed positions on the illumination optical axis Ax. The light source device 4 and the projection optical device 36 are disposed at prescribed positions on the illumination optical axis Ax.

[0061] The projection optical device 36 is a projection lens that magnifies and projects the image light formed by the image-forming device 34 to a projection surface. That is, the projection optical device 36 projects the light modulated by the light-modulating devices 343B, 343G, 343R. The projection optical device 36 is constituted, for example, by a plurality of lens groups housed in a cylindrical lens barrel 361.

[0062] The lens moving mechanism moves the lens barrel 361 in a direction perpendicular to the lens optical axis of the projection optical device 36. When one of the dials DA1, DA2 is operated, the lens moving mechanism moves the lens barrel 361 in a direction linking the top surface portion 23 and the bottom surface portion 24. When the other of the dials DA1, DA2 is operated, the lens moving mechanism moves the lens barrel 361 in a direction linking the right side surface portion 25 and the left side surface portion 26. Thereby, the projection position of the image light of the projection optical device 36 on the projection surface is moved.

[0063] [Structure of light source device]

[0064] Figure 3 is a schematic view showing the structure of the light source device 4.

[0065] The light source device 4 emits, to the homogenizing device 31, illumination light that illuminates the light-modulating devices 343 of the image-forming device 34. As shown in Figure 3 addition to the light source 41, the afocal optical element 42, the first phase difference element 43, the diffusion transmission element 44, the light-separating and combining element 45, the second phase difference element 46, the first condensing element 47, the diffusion optical element 48, the second condensing element 49, the wavelength conversion device 50, and the third phase difference element 51, the light source device 4 has a light source frame 6 that houses them.

[0066] In addition, the light source frame 6 is described in detail later.

[0067] In the light source device 4, an optical axis Ax1 extending in a straight line and an optical axis Ax2 extending in a straight line perpendicular to the optical axis Ax1 are provided. The optical axis Ax2 coincides with the illumination optical axis Ax in the homogenizing device 31.

[0068] The light source 41, the afocal optical element 42, the first phase difference element 43, the diffusion transmission element 44, the light splitting and synthesizing element 45, the second phase difference element 46, the first converging element 47, and the diffusion optical element 48 are disposed on the optical axis Ax1.

[0069] The wavelength conversion device 50, the second converging element 49, the light splitting and synthesizing element 45, and the third phase difference element 51 are disposed on the optical axis Ax2.

[0070] In the following description, three directions orthogonal to each other are set as the +X direction, the +Y direction, and the +Z direction. In the present embodiment, the +X direction is the direction in which the light source 41 emits light along the optical axis Ax1, and is also the direction from the front surface portion 21 toward the back surface portion 22. The +Z direction is the direction in which the light source device 4 emits illumination light along the optical axis Ax2, and is also the direction in which the wavelength conversion device 50 emits light along the optical axis Ax2. The +Z direction is also the direction from the left side surface portion 26 toward the right side surface portion 25. The +Y direction is also the direction from the bottom surface portion 24 toward the top surface portion 23. Although not shown, the direction opposite to the +X direction is set as the -X direction, the direction opposite to the +Y direction is set as the -Y direction, and the direction opposite to the +Z direction is set as the -Z direction.

[0071] [Structure of Light Source]

[0072] The light source 41 has at least one solid-state light emitting element 411 that emits light incident on the diffusion optical element 48 and the wavelength conversion device 50 in the +X direction. The solid-state light emitting element 411 emits blue light as excitation light. For example, the solid-state light emitting element 411 is an LD (Laser Diode) that emits laser light with a peak wavelength of 440 nm. Such a light source 41 is fixed to the substrate 71 of the heat dissipation member 7 described later.

[0073] The light emitted by the light source 41 is blue light BLs that is s-polarized with respect to the light splitting and synthesizing element 45. However, the light emitted by the light source 41 can also be blue light BLp that is p-polarized with respect to the light splitting and synthesizing element 45, or can be blue light in which s-polarization and p-polarization are mixed. In the latter case, the first phase difference element 43 can be omitted.

[0074] [Structure of Afocal Optical Element]

[0075] The afocal optical element 42 adjusts the beam diameter of the blue light BLs incident from the light source 41 in the +X direction. The afocal optical element 42 is composed of a lens 421 that converges the incident light and a lens 422 that parallelizes the light beam converged by the lens 421. In addition, the afocal optical element 42 can be omitted.

[0076] [Structure of the 1st phase difference element]

[0077] The 1st phase difference element 43 is provided between the lens 421 and the lens 422. The 1st phase difference element 43 converts a part of the incident blue light BLs into blue light BLp and emits light containing the blue light BLs of s polarization and the blue light BLp of p polarization. The 1st phase difference element 43 is rotated by a not-shown rotating device with the rotation axis along the optical axis Ax1 as the center, and thereby, the ratio of the s polarization component to the p polarization component in the blue light emitted from the 1st phase difference element 43 is adjusted according to the rotation angle of the 1st phase difference element 43. However, the 1st phase difference element 43 can not be rotated.

[0078] [Structure of the diffusion transmission element]

[0079] The diffusion transmission element 44 homogenizes the luminance distribution of the blue light BLp, BLs incident from the lens 422 in the +X direction. The blue light BLs, BLp that has passed through the diffusion transmission element 44 is incident to the light separating and synthesizing element 45. The diffusion transmission element 44 can be exemplified by a structure having a hologram, a structure in which a plurality of small lenses are arranged in the optical axis orthogonal plane, and a structure in which the light passing surface is a rough surface.

[0080] In addition, a beam homogenizing optical element having one-to-many lenses can be used instead of the diffusion transmission element 44.

[0081] [Structure of the light separating and synthesizing element]

[0082] The light separating and synthesizing element 45 has a function as a light separating element that separates the incident light and a function as a light synthesizing element that synthesizes the light incident from two directions.

[0083] The light-separating / synthesizing element 45 is a polarization beam splitter that separates s-polarization components and p-polarization components included in incident light. Specifically, the light-separating / synthesizing element 45 reflects s-polarization components and transmits p-polarization components. In addition, the light-separating / synthesizing element 45 has a color-separating characteristic of transmitting light of a prescribed wavelength or more regardless of which of the s-polarization components and the p-polarization components. Therefore, the p-polarized blue light BLp among the blue light BLp, BLs incident on the light-separating / synthesizing element 45 from the diffusion-transmitting element 44 is transmitted through the light-separating / synthesizing element 45 in the +X direction and is incident on the 2nd phase difference element 46. On the other hand, the s-polarized blue light BLs is reflected by the light-separating / synthesizing element 45 in the -X direction and is incident on the 2nd converging element 49.

[0084] In addition, the light-separating / synthesizing element 45 can also have a function as a half mirror that transmits a part of light incident from the light source 41 via the diffusion-transmitting element 44 and reflects the remaining light, and a function as a dichroic mirror that reflects blue light incident from the diffusion optical element 48 and transmits fluorescent light incident from the wavelength conversion device 50 and having a wavelength longer than that of the blue light. In this case, the 1st phase difference element 43 can be omitted.

[0085] [Structure of 2nd phase difference element]

[0086] The 2nd phase difference element 46 is disposed in the +X direction with respect to the light-separating / synthesizing element 45. That is, the 2nd phase difference element 46 is disposed between the light-separating / synthesizing element 45 and the 1st converging element 47. The 2nd phase difference element 46 converts the blue light BLp that has passed through the light-separating / synthesizing element 45 in the +X direction into circularly polarized blue light BLc. The blue light BLc that has passed through the 2nd phase difference element 46 in the +X direction is incident on the 1st converging element 47.

[0087] [Structure of 1st converging element]

[0088] The 1st converging element 47 converges the blue light BLc incident from the 2nd phase difference element 46 toward the diffusion optical element 48 in the +X direction through the light-separating / synthesizing element 45. In addition, the 1st converging element 47 parallelizes light incident from the diffusion optical element 48 in the -X direction and emits the light toward the 2nd phase difference element 46. In the present embodiment, the 1st converging element 47 is constituted by three lenses 471, 472, 473, but the number of lenses constituting the 1st converging element 47 is not limited.

[0089] [Structure of diffusion optical element]

[0090] The diffusion optical element 48 diffuses the incident blue light BLc with the same diffusion angle as the fluorescent light YL emitted from the wavelength conversion device 50. Specifically, the diffusion optical element 48 diffuses the blue light BLc incident from the first converging element 47 in the +X direction in the -X direction by reflection. The diffusion optical element 48 is a reflecting element that performs Lambertian reflection of the incident blue light BLc. In addition, the diffusion optical element 48 can be rotated by a rotating device about a rotation axis parallel to the optical axis Ax2. The blue light BLc diffused by the diffusion optical element 48 is incident to the second phase difference element 46 after passing through the first converging element 47 in the -X direction. The blue light BLc incident to the diffusion optical element 48 is converted to circularly polarized light with the rotation direction being the opposite direction when reflected by the diffusion optical element 48. Therefore, the blue light BLc incident to the second phase difference element 46 via the first converging element 47 is converted to s-polarized blue light BLs by the second phase difference element 46. Then, the blue light BLs is reflected in the +Z direction by the light splitting and synthesizing element 45 and is incident to the third phase difference element 51.

[0091] [Structure of the second converging element]

[0092] The second converging element 49 converges the blue light BLs reflected in the -Z direction by the light splitting and synthesizing element 45 to the phosphor layer 503 of the phosphor wheel 501 of the wavelength conversion device 50 described later. In addition, the second converging element 49 parallelizes the fluorescent light YL incident in the +Z direction from the phosphor layer 503 and emits the parallelized fluorescent light YL to the light splitting and synthesizing element 45. In the present embodiment, the second converging element 49 is composed of three lenses 491, 492, and 493, but the number of lenses constituting the second converging element 49 is not limited.

[0093] [Outline structure of the wavelength conversion device]

[0094] The wavelength conversion device 50 converts the wavelength of the blue light BLs incident in the -Z direction from the second converging element 49 and emits the fluorescent light YL in the +Z direction. That is, the wavelength conversion device 50 is a so-called reflection-type wavelength conversion device that emits the fluorescent light YL having a longer wavelength than the blue light BLs as excitation light in a direction opposite to the incident direction of the blue light BLs. The fluorescent light YL is light containing green light and red light and is light containing s-polarized components and p-polarized components with respect to the light splitting and synthesizing element 45. In addition, the structure of the wavelength conversion device 50 is described in detail later.

[0095] The fluorescent light YL emitted from the wavelength conversion device 50 toward the +Z direction is parallelized by the 2nd converging element 49, and then incident on the light separating / synthesizing element 45. As described above, the light separating / synthesizing element 45 has a property of transmitting the fluorescent light YL, and thus the fluorescent light YL incident on the light separating / synthesizing element 45 along the +Z direction is transmitted through the light separating / synthesizing element 45 and then incident on the 3rd phase difference element 51. That is, the light incident on the 3rd phase difference element 51 from the light separating / synthesizing element 45 is white light in which the blue light BLs and the fluorescent light YL are mixed.

[0096] [Structure of 3rd phase difference element]

[0097] The 3rd phase difference element 51 converts the white light containing the blue light BLs and the fluorescent light YL incident from the light separating / synthesizing element 45 into white light in which s-polarized light and p-polarized light are mixed. The white light thus converted is emitted toward the +Z direction as the illumination light LT, and then incident on the above-described uniformizing device 31.

[0098] [Structure of wavelength conversion device]

[0099] Figure 4 is a perspective view showing the wavelength conversion device 50 and the heat transfer member 65.

[0100] The wavelength conversion device 50 emits the fluorescent light YL by converting the wavelength of the blue light BLs incident from the 2nd converging element 49. As shown in Figure 3 and Figure 4 The wavelength conversion device 50 has a phosphor wheel 501, a drive section 505, and a hub 506.

[0101] The drive section 505 is a motor, and is coupled to the phosphor wheel 501 via the hub 506. The drive section 505 rotates the hub 506, and thereby rotates the phosphor wheel 501 about a rotation axis Rx along the optical axis Ax2. That is, the hub 506 is a coupling member that couples the phosphor wheel 501 to the drive section 505. Further, a cable CA extends from the drive section 505.

[0102] The phosphor wheel 501 includes a rotating plate 502, a phosphor layer 503, and a reflecting section 504.

[0103] The rotating plate 502 supports the phosphor layer 503 and the reflecting section 504. The rotating plate 502 is rotated about the rotation axis Rx by the drive section 505. The rotating plate 502 has a 1st surface 5021, a 2nd surface 5022, an opening 5023, and a plurality of fins 5024.

[0104] The 1st surface 5021 is a surface facing the +Z direction.

[0105] The 2nd surface 5022 is a surface opposite to the 1st surface 5021, and is a surface facing the -Z direction.

[0106] The opening 5023 is provided in a central portion of the rotating plate 502, and penetrates the rotating plate 502 along the rotation axis Rx. The opening 5023 is formed in a circular shape when viewed from the +Z direction which is the incident side of the blue light BLs.

[0107] A plurality of fins 5024 are provided on the 2nd surface 5022 outside the opening 5023. Although detailed illustration is omitted, the plurality of fins 5024 respectively extend from the portion on the rotation axis Rx side toward the outside of the rotating plate 502. In the present embodiment, each fin 5024 extends in a curved shape in a manner that the direction thereof is opposite to the rotation direction of the rotating plate 502 as the end portion on the rotation axis Rx side is directed toward the outside of the rotating plate 502. However, the extending direction of each fin 5024 can be appropriately changed.

[0108] The phosphor layer 503 is arranged in a ring shape centered on the rotation axis Rx outside the opening 5023 of the 1st surface 5021. The phosphor layer 503 contains a phosphor that converts the wavelength of the blue light BLs incident from the 2nd converging element 49. That is, the phosphor layer 503 is excited by the blue light BLs as excitation light to emit the fluorescent light YL. In addition, the phosphor layer 503 is heated by the incidence of the blue light BLs. A part of the heat generated by the phosphor layer 503 is directly dissipated from the phosphor layer 503, and the other heat is transferred to the rotating plate 502 via the reflecting portion 504 to be dissipated.

[0109] The reflecting portion 504 is provided between the phosphor layer 503 and the 1st surface 5021, and reflects light incident from the phosphor layer 503 toward the +Z direction. In addition, in a case where the 1st surface 5021 can be used as a reflecting surface, the reflecting portion 504 can also be omitted.

[0110] When such a phosphor wheel 501 is rotated by the driving portion 505, gas is sucked from the space on the 1st surface 5021 side, and an air current flowing toward the 2nd surface 5022 side from the opening 5023 is generated. Such an air current flows toward the outside of the rotating plate 502 between the plurality of fins 5024 provided on the 2nd surface 5022. Thereby, the heat generated in the phosphor layer 503 and transferred to the plurality of fins 5024 is transferred to the air current, and the phosphor layer 503 is cooled. In addition, the heat of the air current after cooling the plurality of fins 5024 is absorbed by the heat transfer member 65 connected to the end portion on the -Z direction of the driving portion 505, and is dissipated to the outside of the light source frame 6.

[0111] [Structure of Light Source Frame]

[0112] As Figure 3As shown, the light source frame 6 has a housing space SP that houses the light source 41, the afocal optical element 42, the first phase difference element 43, the diffusion transmission element 44, the light separation and synthesis element 45, the second phase difference element 46, the first converging element 47, the diffusion optical element 48, the second converging element 49, the wavelength conversion device 50, and the third phase difference element 51. The light source frame 6 is a sealed frame in which dust and the like hardly intrudes into the inside.

[0113] Figure 5 is a perspective view of the light source device 4 as viewed from the -X direction, Figure 6 is a perspective view of the light source device 4 as viewed from the +X direction.

[0114] As shown in Figure 5 and Figure 6 , the light source frame 6 has a housing frame 61, a duct 64, a heat transfer member 65, an exhaust port 66, and a heat dissipation member 7.

[0115] [Structure of Housing Frame]

[0116] The housing frame 61 corresponds to the frame of the present disclosure. The housing frame 61 has a first face 611, a second face 612, a third face 613, a fourth face 614, a fifth face 615, and a sixth face 616.

[0117] The first face 611 is an outer surface facing the -X direction, and corresponds to the first outer surface. The substrate 71 of the heat dissipation member 7 described later is attached to the first face 611. That is, at least a part of the first face 611 is constituted by the substrate 71.

[0118] The second face 612 is a face facing the +Y direction, and corresponds to the second outer surface intersecting the first face 611. At least a part of the second face 612 is constituted by the cover member 63.

[0119] The third face 613 is a face facing the -Z direction, and corresponds to the third outer surface intersecting the first face 611 and the second face 612, respectively. At least a part of the third face 613 is constituted by the heat transfer member 65.

[0120] The fourth face 614 is a face facing the +X direction, and is a face on the opposite side of the first face 611.

[0121] The fifth face 615 is a face facing the -Y direction, and is a face on the opposite side of the second face 612.

[0122] The sixth face 616 is a face facing the +Z direction, and is a face on the opposite side of the third face 613. The sixth face 616 is a face from which the illumination light LT that has passed through the third phase difference element 51 is emitted.

[0123] Figure 7 is an exploded perspective view of the light source device 4 as viewed from the -X direction and the +Y direction,Figure 8 is an exploded perspective view of the light source device 4 viewed from the +X direction and the -Y direction.

[0124] As shown in Figure 7 , the housing 61 has the housing space SP described above. As shown in Figure 7 and Figure 8 , the housing 61 has a lower housing 62 and a cover member 63, and is configured by combining the lower housing 62 and the cover member 63.

[0125] The lower housing 62 is a box-shaped housing that mainly constitutes the -Y direction portion in the housing 61. As shown in Figure 7 , the lower housing 62 has a housing recess 62A that forms the housing space SP described above. The housing recess 62A is a recess that is recessed toward the -Y direction from the +Y direction surface of the lower housing 62.

[0126] As shown in Figure 7 , the cover member 63 is a metal member that is attached to the lower housing 62 in a manner to cover the housing recess 62A in the +Y direction.

[0127] Here, the temperature of the gas in the housing space SP rises due to the heat generation of each of the light source 41 and the wavelength conversion device 50 disposed in the housing space SP. That is, the temperature of the gas in the housing space SP rises due to the light source device 4 being lit.

[0128] In contrast to this, the cover member 63 is in contact with the gas in the housing space SP, and the cover member 63 is heated from the gas in the housing space SP and radiates heat to the outside of the housing 61, whereby the temperature in the housing space SP can be reduced.

[0129] In addition, the gas flow that has passed through the flow passage 713 of the substrate 71 described later passes through the cover member 63, and the cover member 63 transmits the heat received from the gas in the housing space SP to the gas flow.

[0130] [Structure of Heat Radiating Member]

[0131] Figure 9 is an exploded perspective view of the heat radiating member 7 viewed from the -X direction and the +Y direction, Figure 10 is an exploded perspective view of the heat radiating member 7 viewed from the +X direction and the -Y direction.

[0132] The heat radiating member 7 radiates the heat of the light source 41 transmitted from the light source 41 and cools the light source 41. As shown in Figure 9 and Figure 10 , the heat radiating member 7 has a substrate 71, a heat pipe 73, a heat sink 74, and an air guide member 76.

[0133] [Structure of Substrate]

[0134] As Figure 9 shown, the substrate 71 is a plate body formed in a substantially rectangular shape when viewed in the -X direction, and is mounted to the first surface 611 of the housing 61 by a mounting member such as a screw. That is, the substrate 71 constitutes at least a portion of the first surface 611. Although detailed illustration is omitted, the solid light emitting element 411 of the light source 41 is fixed to a surface of the substrate 71 facing the +X direction. That is, the substrate 71 supports the light source 41, and the heat of the light source 41 is transmitted to the substrate 71.

[0135] The substrate 71 has a disposition recess 712 in which the vapor chamber 72 is disposed in a surface 711 facing the -X direction. The disposition recess 712 is a recessed portion recessed in the +Z direction from the surface 711 according to the shape of the vapor chamber 72 when viewed in the -X direction, and the vapor chamber 72 is mounted to the disposition recess 712 from the -X direction. That is, the light source device 4 has the vapor chamber 72 disposed to the substrate 71.

[0136] Further, two through-holes 7121 in a substantially rectangular shape are provided in the bottom of the disposition recess 712. The two through-holes 7121 each penetrate the substrate 71 along the +X direction. The connection portions 722 of the vapor chamber 72 disposed in the disposition recess 712 are each inserted into the two through-holes 7121, and thus the connection portions 722 can be brought into contact with the light source 41.

[0137] The substrate 71 has a flow-through port 713 and a connection portion 715 that penetrate the substrate 71 along the +X direction.

[0138] The flow-through port 713 is an opening through which a portion of the airflow flowing toward the heat dissipation member 7 flows toward the heat transfer member 65. The flow-through port 713 is provided at a position away from the center of the substrate 71. In detail, the flow-through port 713 is provided at a position in the +Y direction with respect to the disposition recess 712. In other words, the flow-through port 713 is provided at a position near the end portion in the +Y direction of the substrate 71. As will be described in detail later, the flow-through port 713 is disposed at a position corresponding to the periphery of the fan 8 that causes the airflow to flow toward the heat dissipation member 7 along the +X direction. In other words, the flow-through port 713 is provided at a position through which the airflow on the periphery side among the airflow flowing from the fan 8 toward the heat dissipation member 7 flows.

[0139] Such a flow-through port 713 is constituted by a plurality of opening portions 714 provided separately from each other in the substrate 71. In detail, the plurality of opening portions 714 are arranged in the +Z direction at a position near the end portion in the +Y direction of the substrate 71. In the present embodiment, two opening portions 714 are provided, but the number of opening portions 714 constituting the flow-through port 713 can be appropriately changed.

[0140] The connection portion 715 is provided between the plurality of opening portions 714 and connects the inner edges of the opening portions 714. In the present embodiment, the connection portion 715 is a portion that connects the -Z-direction inner edge of the +Z-direction opening portion 714 and the +Z-direction inner edge of the -Z-direction opening portion 714 in the +Z-direction in which the plurality of opening portions 714 are arranged.

[0141] The wiring WR extending from the light source 41 is arranged on the surface of the connection portion 715 facing the +X-direction.

[0142] [Structure of vapor chamber]

[0143] The vapor chamber 72 is arranged in the arrangement recess 712 of the substrate 71 and constitutes the substrate 71, and diffuses heat received from the light source 41. The vapor chamber 72 has, in addition to the heat receiving portion 721 and the connection portion 722 shown in Figure 8 Figure 7 the heat radiating portion 723 shown in

[0144] Figure 10 The heat receiving portion 721 is a portion of the vapor chamber 72 facing the +X-direction and is opposed to the light source 41.

[0145] The connection portion 722 is a metal member such as copper provided in the heat receiving portion 721. The connection portion 722 is connected to the light source 41 in a manner that enables heat transfer when the vapor chamber 72 is arranged in the arrangement recess 712. Thus, a portion of the heat generated by the light source 41 is transferred to the heat receiving portion 721 via the connection portion 722, and the liquid-phase medium in the vapor chamber 72 is evaporated on the inner surface of the heat receiving portion 721, changing the liquid-phase medium to a gas-phase medium.

[0146] Figure 9 The heat radiating portion 723 radiates the heat of the gas-phase medium changed in the heat receiving portion 721 to the outside of the vapor chamber 72, and condenses the gas-phase medium to a liquid-phase medium. The condensed liquid-phase medium moves toward the inner surface of the heat receiving portion 721 in the closed space in the vapor chamber 72 by capillary force.

[0147] In addition, the heat radiating portion 723 is connected to the heat receiving portion 731 of the heat pipe 73, and the heat released from the heat radiating portion 723 is transferred to the heat receiving portion 731.

[0148] [Structure of heat pipe]

[0149] As shown in Figure 9 and Figure 10 the heat pipe 73 is a heat transfer member that is connected to the vapor chamber 72 and the heat sink 74 in a manner that enables heat transfer, and transports the heat emitted from the vapor chamber 72 to the heat sink 74. The heat pipe 73 has, in addition to the heat receiving portion 731 shown in Figure 10 Figure 9 and Figure 10 ​​The heat dissipation unit 732 shown.

[0150] The heated part 731 is connected to the heat dissipation part 723, and the heat dissipation part 732 is connected to the radiator 74. Thus, the heat pipe 73 transfers the heat dissipated from the heat dissipation part 723 of the vapor chamber 72 to the radiator 74.

[0151] The heat dissipation component 7 has a plurality of heat pipes 73. In this embodiment, the heat dissipation component 7 has five heat pipes 73 arranged in the +Z direction. Each heat pipe 73 is bent into a generally U-shape.

[0152] Of the five heat pipes 73, the three odd-numbered heat pipes 73, starting from the +Z direction, extend from the heated portion 731 towards the +Y direction and bend into a roughly U-shape, connecting the heat dissipation portion 732 to the heat sink 74. The two even-numbered heat pipes 73, starting from the +Z direction, extend from the heated portion 731 towards the -Y direction and bend into a roughly U-shape, connecting the heat dissipation portion 732 to the heat sink 74.

[0153] [Heater Structure]

[0154] The heat sink 74 dissipates the heat transferred by the heat pipe 73. Specifically, the heat sink 74 dissipates the transferred heat to the airflow delivered from the fan 8, described later. Figure 9 and Figure 10 As shown, the heat sink 74 has a plurality of plate-shaped fins 75 arranged along the XZ plane, which are formed by arranging the plurality of fins 75 in the +Y direction and fixing them to each other. That is, the heat dissipation component 7 has a plurality of fins 75.

[0155] like Figure 9 As shown, each fin 75 has multiple ribs 751 protruding in the -Y direction as protrusions. Each rib 751 increases the surface area of ​​the fin 75, thereby improving the heat dissipation of each fin 75. In addition, each rib 751 extends along the heat pipes 73 between the heat pipes 73, thus facilitating the flow of air from the fan 8 between the heat pipes 73.

[0156] [Structure of the air guide component]

[0157] like Figure 9 as well as Figure 10 As shown, the air guide member 76 is configured in a roughly U-shape, opening towards the -Z direction when viewed from the ±X direction, and is arranged to surround the heat sink 74 in the +Y, -Y, and +Z directions. The air guide member 76 has the function of guiding the airflow that is sent from the fan 8 (described later) toward the heat sink 74 and cools the heat sink 74 towards the -Z direction. In addition, an exhaust port 261 is arranged in the -Z direction relative to the heat sink 74, so the airflow guided by the air guide member 76 towards the -Z direction is discharged from the exhaust port 261 to the outside of the outer frame 2.

[0158] [Pipe Structure]

[0159] As shown in Figure 7 and Figure 8 The duct 64 is installed to the housing 61 in a manner to cover a portion of each of the second surface 612 and the third surface 613 of the housing 61. The duct 64 causes the air flow that has passed through the flow port 713 of the substrate 71 to flow along the second surface 612 and then along the third surface 613.

[0160] The duct 64 has a first duct portion 641 and a second duct portion 642.

[0161] The first duct portion 641 extends in the +X direction and covers, in the +Y direction, a portion of the second surface 612 that is constituted by the cover member 63. A cross section of the first duct portion 641 along a YZ plane defined by the +Y direction and the +Z direction is formed in a U shape that is open toward the -Y direction. The periphery of the first duct portion 641 in each of the +X direction and the +Z direction is connected to the second surface 612, and the periphery of the first duct portion 641 in the -X direction is connected to the substrate 71.

[0162] The first duct portion 641 internally constitutes a first duct 64A in which the air flow can flow along the second surface 612. The air flow that has passed through the flow port 713 flows within the first duct 64A and flows in the +X direction along the second surface 612.

[0163] The second duct portion 642 extends in the -Y direction from the -Z direction end of the first duct portion 641 and covers, in the -Z direction, a portion of the third surface 613 that is constituted by the heat transfer member 65. A cross section of the second duct portion 642 along an XZ plane defined by the +X direction and the +Z direction is formed in a U shape that is open toward the +Z direction. The periphery of the second duct portion 642 in each of the +X direction and the -X direction is connected to a surface of the heat transfer member 65 that faces the -Z direction.

[0164] The second duct portion 642 internally constitutes a second duct 64B in which the air flow can flow along the heat transfer member 65. The air flow that has passed through the first duct 64A flows within the second duct 64B and flows in the -Y direction along the heat transfer member 65.

[0165] Further, the -Y direction end of the second duct portion 642 is not connected to the heat transfer member 65. Thus, the light source housing 6 constitutes a discharge port 66 that discharges the air flow that has flowed within the second duct 64B to the outside of the light source housing 6, as will be described later in detail.

[0166] [Structure of Heat Transfer Member]

[0167] As shown in Figure 7 and Figure 8As shown, the heat transfer component 65 is a plate-shaped component fixed to the housing frame 61 and forming part of the third surface 613 of the housing frame 61. That is, the heat transfer component 65 forms part of the outer surface of the housing frame 61. In addition to being heated by the drive unit 505 of the wavelength conversion device 50, the heat transfer component 65 is also heated by the gas in the housing space SP. Furthermore, the heat transfer component 65 dissipates the heat received to the outside of the housing frame 61.

[0168] like Figure 7 As shown, the heat transfer component 65, in addition to having a first surface 651, a connecting portion 652, and a heated column 653, also includes... Figure 8 As shown, it also has a second surface 654, a protrusion 655, a heat dissipation column 656, and a rectifier 657.

[0169] like Figure 7 As shown, the first surface 651 is the surface of the heat transfer component 65 facing the +Z direction. That is, the first surface 651 is the surface opposite to the wavelength conversion device 50 and mounted on the lower frame 62. The first surface 651 is the heated surface that contacts the housing space SP and is heated by the gas inside the housing space SP.

[0170] The connecting portion 652 is located approximately at the center of the first surface 651. The connecting portion 652 is connected to the end of the drive portion 505 in the -Z direction. Therefore, the heat transfer member 65 is subjected to heat generated by the drive portion 505.

[0171] The heated columns 653 are multiple columnar portions erected in the region of the first surface 651 opposite the second surface 5022 of the phosphor wheel 501. The heated columns 653 are arranged at approximately equal intervals along multiple concentric circles centered on the rotation axis Rx. When the heat transfer component 65 is fixed to the housing frame 61, the heated columns 653 are exposed within the housing space SP of the housing frame 61. Furthermore, the heated columns 653 are heated by the gas within the housing space SP.

[0172] like Figure 8 As shown, the second surface 654 is the surface of the heat transfer component 65 facing the -Z direction. The portion of the second surface 654 in the +Y direction is covered by the second pipe portion 642 of the pipe 64 in the -Z direction.

[0173] The protrusion 655 is the portion that protrudes in the -Z direction from the connecting portion 652 in the second surface 654.

[0174] The heat dissipation columns 656 are columnar portions provided in plurality around the protrusion 655 on the second face 654. The plurality of heat dissipation columns 656 are respectively arranged at substantially equal intervals along a plurality of concentric circles centered on the rotation axis Rx. The plurality of heat dissipation columns 656 respectively dissipate heat of the drive portion 505 transferred to the connecting portion 652 and heat of the gas in the accommodation space SP received by the plurality of heat receiving columns 653. Further, the heat dissipation columns 656 can also be provided in the second face 654 at positions corresponding to the heat receiving columns 653.

[0175] The rectifying portion 657 is a standing wall standing up in the -Y direction from a portion of the second face 654 in the -Z direction. A central portion of the rectifying portion 657 in the +X direction is located at a position in the -Y direction from end portions in the +X direction and the -X direction. Further, an end portion in the +X direction and the -Y direction of the second pipe portion 642 of the pipe 64 is connected to an end portion in the -X direction and the -Y direction of the rectifying portion 657. Thus, the rectifying portion 657 and the pipe 64 combine to constitute the exhaust port 66 shown in Figs. 17 and 18. Figure 5 Figure 9

[0176] Further, a face 6571 of the rectifying portion 657 in the -Z direction is an inclined face protruding in the -Z direction as it goes in the -Y direction. Thus, the structure of the heat transfer member 65 is a structure in which the gas flow easily flows out of the exhaust port 66 along the rectifying portion 657.

[0177] [Structure of fan]

[0178] Figure 11 is a perspective view showing the arrangement of the light source device 4 and the fan 8 in the outer frame 2.

[0179] The projector 1 has, in addition to the above structure, the fan 8 that causes the gas flow to circulate in the light source device 4 as shown in Figs. 19 and 20. Figure 11

[0180] The fan 8 is arranged in the outer frame 2 corresponding to the first guide inlet 213 of the front face portion 21. In other words, the fan 8 is arranged in the -X direction with respect to the light source device 4 between the first guide inlet 213 and the light source device 4. The fan 8 sends out the gas from the outside of the outer frame 2 introduced from the first guide inlet 213 in the +X direction, generating a gas flow that circulates through the heat dissipation member 7.

[0181] Figure 12 is a side view of the light source device 4 and the fan 8 viewed from the -X direction. In addition, in Figs. 21 and 22, the illustration of the heat sink 74 constituting the heat dissipation member 7 is omitted. Figure 12

[0182] ​​​​In this embodiment, the fan 8 is an axial fan with a fan housing 81 having a generally rectangular parallelepiped shape. For example... Figure 12 As shown, the fan 8 has a blade component 82 that rotates around a rotation axis Rx1 along the +X direction, and a motor 83 that rotates the blade component 82. The blade component 82 and the motor 83 are disposed within the fan housing 81.

[0183] In addition, the fan housing 81 has an opening 811 through which airflow passes. When viewed from the ±X direction, the inner edge of the opening 811 is formed into a circular shape along the rotational trajectory of the outer periphery of the blade member 82.

[0184] [The relationship between the fan and the air vent]

[0185] Figure 13 This diagram shows the positional relationship between the flow port 713 of the substrate 71 and the fan 8 when viewed from the +X direction. Additionally, in Figure 13 The illustrations of heat pipe 73 and radiator 74 are omitted in the text.

[0186] When the light source device 4 and the fan 8 are installed inside the outer frame 2, such as Figure 12 and Figure 13 As shown, when viewed from the ±X direction, the flow port 713 of the substrate 71 of the heat dissipation component 7 constituting the light source device 4 is positioned away from the rotation axis of the fan 8 and close to the periphery of the fan 8. That is, when viewed from the fan 8 side, the flow port 713 coincides with the fan 8 and is located closer to the periphery of the fan 8 than the center side of the fan 8. In this embodiment, when viewed from the ±X direction, the flow port 713 coincides with the periphery of the opening 811 of the fan 8 and also coincides with the trajectory of the outer periphery of the rotating blade component 82.

[0187] Therefore, when the fan 8 is driven, a portion of the peripheral airflow generated by the fan 8 flows toward the flow port 713. On the other hand, when viewed from the -X direction, the vapor chamber 72 coincides with the rotation axis of the blade component 82. Most of the airflow generated by the fan 8 flows toward the fins 75 of the radiator 74, which is connected to the vapor chamber 72 via the heat pipe 73.

[0188] Figure 14 This is a diagram showing the positional relationship between the flow port 713 of the substrate 71, the heat pipe 73, and the fins 75 when viewed from the +X direction.

[0189] In addition, such as Figure 14 As shown, when viewing the substrate 71 from the +X direction, each opening 714 of the flow port 713 not only coincides with a portion of the multiple fins 75 constituting the heat sink 74, but also with a portion of the heat pipe 73. The same applies when viewing the heat dissipation component 7 from the -X direction, which serves as the fan 8 side.

[0190] Therefore, the air flow sent out from the fan 8 and passing through the flow passage 713 flows not only along the fins 75 but also along the heat pipe 73.

[0191] However, the flow passage 713 and the fins 75 can not coincide with each other, and the flow passage 713 and the heat pipe 73 can not coincide with each other, when viewed in the ±X direction.

[0192] [air flow sent from the fan]

[0193] Figure 15 is a view showing a cross section of the light source device 4 and the fan 8 along the XZ plane in the first duct portion 641, in other words, Figure 15 is a view showing the air flow sent from the fan 8.

[0194] When the fan 8 is driven, the gas outside the housing 2 is drawn from the first guide inlet 213 of the front surface portion 21, as shown by an arrow Al in Figure 15 , and the air flow is sent from the fan 8 toward the heat radiating member 7. The air flow sent from the fan 8 toward the heat radiating member 7 passes through the vapor cavity 72 and the heat pipe 73, and flows toward the plurality of fins 75 constituting the heat sink 74 from which heat is transferred from the light source 41.

[0195] The air flow among the air flows flowing in the plurality of fins 75, which flows toward the flow passage 713 when viewed in the -X direction, is shown by an arrow A2, passes through a part of the plurality of fins 75 in the +X direction, and further passes through the respective opening portions 714 of the flow passage 713 in the +X direction.

[0196] The air flow among the air flows flowing in the plurality of fins 75, which flows toward the part of the substrate 71 different from the flow passage 713 when viewed in the -X direction, is shown by an arrow A3, flows in the +X direction between the plurality of fins 75, and cools the plurality of fins 75. The air flow cooling the plurality of fins 75 is shown by an arrow A4, is guided by the air guide member 76 in the -Z direction, and is discharged to the outside of the housing 2 via the discharge port 261.

[0197] The air flow passing through the respective opening portions 714 in the +X direction flows in the +X direction in the first duct 64A. At this time, the air flow flows along the cover member 63 constituting the first duct 64A. Thus, the cover member 63 from which heat is transferred from the gas in the accommodation space SP is cooled, and the temperature in the accommodation space SP is lowered.

[0198] Further, the air flow cooling the cover member 63 flows toward the second duct 64B as shown by an arrow A5.

[0199] Figure 16 is a view showing a cross section of the light source device 4 along the YZ plane in the second duct portion 642. In other words, Figure 16is a view showing the air flow sent out from the fan 8.

[0200] In Figure 16 the air flow shown by the arrow A5 flowing into the second duct 64B flows in the -Y direction in the second duct 64B as shown by the arrow A6. At this time, the air flow flows along the second surface 654 and the heat dissipation column 656 of the heat transfer member 65, and the heat transfer member 65 is cooled. The heat of the driving section 505 of the wavelength conversion device 50 and the heat of the gas in the accommodation space SP are transferred to the heat transfer member 65, and thus the temperature of each of the wavelength conversion device 50 and the accommodation space SP is reduced by cooling the heat transfer member 65.

[0201] The air flow flowing along the heat transfer member 65 is discharged to the outside of the light source device 4 through the discharge port 66 as shown by the arrow A7. At this time, the air flow flows along the surface 6571 of the rectifying section 657, and thus the air flow flowing in the second duct 64B can be easily discharged from the discharge port 66.

[0202] In addition, the discharge port 66 faces the discharge port 263 provided to the left side surface portion 26 of the outer frame 2, and thus the air flow discharged from the discharge port 66 is discharged to the outside of the outer frame 2 from the discharge port 263.

[0203] [Effects of Embodiment]

[0204] The projector 1 of the above-described embodiment has the following effects.

[0205] The projector 1 includes: a light source device 4; a light modulation device 343 that modulates light emitted from the light source device 4; a projection optical device 36 that projects light modulated by the light modulation device 343; and a fan 8 that causes an air flow to flow toward a heat dissipation member 7 of the light source device 4.

[0206] The light source device 4 includes: a light source 41 that emits light; the heat dissipation member 7 that dissipates heat of the light source 41; a wavelength conversion device 50 that converts the wavelength of light emitted from the light source 41; an accommodation frame 61 that has an accommodation space SP that accommodates the light source 41 and the wavelength conversion device 50; and a heat transfer member 65 that is provided to the accommodation frame 61, constitutes a part of an outer surface of the accommodation frame 61, and is thermally connected to the wavelength conversion device 50. The heat dissipation member 7 includes a substrate 71 that supports the light source 41 and a plurality of fins 75 arranged on the substrate 71. The substrate 71 has a flow passage 713 that penetrates the substrate 71 and causes a part of the air flow flowing toward the heat dissipation member 7 to flow toward the heat transfer member 65.

[0207] According to such a structure, a part of the air current flowing to the heat-dissipating member 7 flows to the heat-transferring member 65 through the flow passage 713 provided in the substrate 71, and the other air current cools the heat-dissipating member 7. Thus, the heat-dissipating member 7 connected to the light source 41 and the heat-transferring member 65 connected to the wavelength conversion device 50 can be cooled by the air current flowing to the heat-dissipating member 7 from the fan 8, and further, the light source 41 and the wavelength conversion device 50 can be cooled. Therefore, the number of fans can be reduced compared to the case where the fans are provided respectively for the light source 41 and the wavelength conversion device 50, and thus, the light source device 4 can be downsized.

[0208] In addition, the air current passing through the flow passage 713 flows to the heat-transferring member 65, and thus, the temperature of the air current flowing to the heat-transferring member 65 can be lowered compared to the case where the air current cooling the entire heat-dissipating member 7 flows to the heat-transferring member 65. In other words, the air current having a relatively low temperature can flow to the heat-transferring member 65.

[0209] Therefore, the cooling efficiency of the light source 41 and the wavelength conversion device 50 can be ensured and the light source device 4 can be downsized.

[0210] In the light source device 4, the heat-transferring member 65 has a plurality of heat-dissipating columns 656 provided on a second surface 654 of the heat-transferring member 65. The second surface 654 corresponds to an outer surface, and the heat-dissipating columns 656 correspond to columns.

[0211] According to such a structure, the contact area of the air current flowing to the heat-transferring member 65 with the heat-transferring member 65 can be increased, and thus, the heat of the wavelength conversion device 50 transferred to the heat-transferring member 65 can be easily transferred to the air current flowing to the heat-transferring member 65. Therefore, the cooling efficiency of the wavelength conversion device 50 can be improved.

[0212] In the light source device 4, the wavelength conversion device 50 has a driving section 505 as a motor, a rotating plate 502 rotated by the driving section 505, and a phosphor layer 503 provided on the rotating plate 502 and converting the wavelength of incident light. The heat-transferring member 65 is connected to the driving section 505 in a manner that heat can be transferred therebetween.

[0213] According to such a structure, the heat-transferring member 65 transfers at least the heat transferred from the driving section 505 to the air current flowing to the heat-transferring member 65, and thus, the cooling efficiency of the driving section 505 can be improved, and further, the cooling efficiency of the wavelength conversion device 50 can be improved.

[0214] In the light source device 4, the housing frame 61 has a first surface 611, at least a portion of which is constituted by the substrate 71; a second surface 612 intersecting the first surface 611; and a third surface 613 intersecting the first surface 611 and the second surface 612, respectively. At least a portion of the third surface 613 is constituted by the heat transfer member 65. The first surface 611 corresponds to the first outer surface, the second surface 612 corresponds to the second outer surface, and the third surface 613 corresponds to the third outer surface.

[0215] The gas flow that has passed through the flow passage 713 flows along the heat transfer member 65 after flowing along the second surface 612.

[0216] According to such a configuration, the gas flow that has passed through the flow passage 713 flows along the heat transfer member 65 after flowing along the second surface 612. Thus, in addition to making it easy for the gas flow to flow along the heat transfer member 65, it is also possible to easily discharge the gas flow that has flowed along the heat transfer member 65, as compared with the case where the gas flow that has passed through the flow passage 713 directly flows to the heat transfer member 65. Therefore, it is possible to improve the cooling efficiency of the heat transfer member 65, and further improve the cooling efficiency of the wavelength conversion device 50.

[0217] In the light source device 4, the heat transfer member 65 has a first surface 651 on the side opposite to the second surface 654 that constitutes the third surface 613 and that is heated by the gas flow from the inside of the housing space SP. The first surface 651 is a heat receiving surface.

[0218] According to such a configuration, the heat in the housing space SP received by the first surface 651 is dissipated to the outside of the housing frame 61 from the second surface 654 of the heat transfer member 65, and thus it is possible to lower the temperature in the housing space SP, and further improve the cooling efficiency of the light source 41 and the wavelength conversion device 50 in the housing frame 61.

[0219] In the light source device 4, at least a portion of the second surface 612 is constituted by the cover member 63. The cover member 63 is a metal member that is heated by the gas from the inside of the housing space SP.

[0220] According to such a configuration, the gas flow that has passed through the flow passage 713 flows to the heat transfer member 65 after cooling the cover member 63 that is heated by the gas from the inside of the housing space SP. Thus, it is possible to lower the temperature in the housing space SP, and thus it is possible to cool the light source 41 and the wavelength conversion device 50 in the inside of the housing frame 61. Therefore, it is possible to improve the cooling efficiency of the light source 41 and the wavelength conversion device 50.

[0221] The light source device 4 has a duct 64 that guides the gas flow that has passed through the flow passage 713 to the heat transfer member 65.

[0222] According to such a structure, the air flow that has passed through the flow passage 713 can easily flow to the heat transfer member 65. Therefore, compared to a case where the air flow that has passed through the flow passage 713 diffuses while flowing to the heat transfer member 65, the cooling efficiency of the heat transfer member 65, and further the cooling efficiency of the wavelength conversion device 50, can be improved.

[0223] Further, in the light source device 4, the air flow can easily flow to the cover member 63 by the duct 64, and therefore, as described above, the cooling efficiency of the light source 41 and the wavelength conversion device 50 can be improved.

[0224] The light source device 4 has a discharge port 66 formed by the duct 64 and the heat transfer member 65. The discharge port 66 is provided at a portion of the heat transfer member 65 on a downstream side in a flow direction of the air flow that flows in the heat transfer member 65, that is, a portion of the heat transfer member 65 in the -Y direction, and discharges the air flow that flows in the heat transfer member 65.

[0225] According to such a structure, the air flow that has flowed in the heat transfer member 65 can be promptly discharged. Therefore, compared to a case where the air flow that flows in the heat transfer member 65 stagnates, the cooling efficiency of the heat transfer member 65, and further the cooling efficiency of the wavelength conversion device 50, can be improved.

[0226] In the light source device 4, the flow passage 713 is constituted by a plurality of opening portions 714 that are provided separately from each other in the substrate 71. The substrate 71 has a connection portion 715 that is provided between the plurality of opening portions 714 and connects inner edges of the plurality of opening portions 714 to each other.

[0227] According to such a structure, the substrate 71 can be reinforced by the connection portion 715. Further, a wiring that extends from the light source 41 can be arranged at the connection portion 715.

[0228] In the light source device 4, the flow passage 713 and at least one fin 75 of the plurality of fins 75 coincide with each other when viewed in a flow direction of the air flow with respect to the heat dissipation member 7. That is, as shown in FIG. 7, the flow passage 713 and at least one fin 75 of the plurality of fins 75 coincide with each other when viewed in the +X direction, and the same applies when viewed in the +X direction as the flow direction of the air flow. Figure 14

[0229] According to such a structure, the air flow that has cooled at least one fin 75 can flow to the heat transfer member 65. Thereby, compared to a case where a part of the air flow that flows to the heat dissipation member 7 passes through the flow passage 713 without passing through the fin 75, the decrease in the cooling efficiency of the light source 41 can be suppressed.

[0230] ​In addition, generally, the upper limit of the allowable temperature range of the wavelength conversion device 50 is higher than the upper limit of the allowable temperature range of the light source 41, and thus, even if the air current flowing in at least one of the fins 75 flows to the heat transfer member 65 and the wavelength conversion device 50 is cooled, it is possible to easily converge the temperatures of the light source 41 and the wavelength conversion device 50 in the respective allowable temperature ranges.

[0231] In the light source device 4, the heat dissipation member 7 has a vapor cavity 72 provided to the substrate 71 and heated by the light source 41. The plurality of fins 75 dissipate heat transferred from the vapor cavity 72.

[0232] According to such a configuration, the heat dissipation performance of the vapor cavity 72 is high, and thus, it is possible to rapidly transfer heat of the light source 41 from the substrate 71 to each of the plurality of fins 75.

[0233] In the light source device 4, the heat dissipation member 7 has a heat pipe 73 that transfers heat. The heat pipe 73 has a heat receiving portion 731 connected to the vapor cavity 72 and a heat dissipating portion 732 connected to at least one of the plurality of fins 75, and dissipates heat received by the heat receiving portion 731 to the fin 75.

[0234] According to such a configuration, it is possible to easily transfer heat to the fin 75 that is difficult to transfer heat from the vapor cavity 72 among the plurality of fins 75 by the heat pipe 73. Thus, it is possible to efficiently transfer heat to the plurality of fins 75, and further, it is possible to easily transfer heat from the plurality of fins 75 to the air current flowing to the heat dissipation member 7. Therefore, it is possible to improve the cooling efficiency of the light source 41.

[0235] In the projector 1, the fan 8 is an axial fan. The flow passage 713 coincides with the fan 8 and is located on the peripheral edge side of the fan 8 than the center side of the fan 8 when the heat dissipation member 7 is viewed from the fan 8 side.

[0236] Generally, the flow rate distribution of the air current sent out by the axial fan is that the flow rate is larger as it is closer to the center of the axial fan, and the air volume becomes smaller toward the peripheral edge. Therefore, by sending out the air current sent out from the position close to the center of the axial fan to the plurality of fins 75, it is possible to secure the cooling efficiency of the light source 41, and by causing the air current on the peripheral edge side of the fan 8 to flow to the heat transfer member 65 from the flow passage 713, it is possible to secure the cooling efficiency of the wavelength conversion device 50.

[0237] [Variations of Embodiments]

[0238] The present disclosure is not limited to the above-described embodiments, and variations and modifications within the scope of achieving the objects of the present disclosure are included in the present disclosure.

[0239] In the above embodiment, the gas flow that has passed through the flow port 713 of the substrate 71 passes along the lid member 63 that constitutes the second surface 612, and then passes along the heat transfer member 65 that constitutes the third surface 613. However, the present application is not limited to this, and the gas flow that has passed through the flow port 713 can directly pass to the heat transfer member 65. In this case, for example, the flow port can be provided along the end edge in the -Z direction of the substrate 71, and the gas flow that has passed through the flow port can pass along the heat transfer member 65.

[0240] In the above embodiment, the plurality of heat radiating columns 656 are provided on the second surface 654 that is the outer surface of the heat transfer member 65. However, the present application is not limited to this, and the heat transfer member 65 can not have the heat radiating columns 656, and can not have the heat receiving columns 653. In addition, the first surface 651 of the heat transfer member 65 that contacts the gas in the accommodation space SP can not be a heat receiving surface.

[0241] In the above embodiment, the heat transfer member 65 is connected to the driving section 505 that constitutes the wavelength conversion device 50. However, the present application is not limited to this, and for example, in the case where the wavelength conversion device 50 does not have the driving section 505 and the phosphor layer 503 does not rotate, the heat transfer member 65 can be connected to the phosphor layer 503 or a substrate that supports the phosphor layer 503.

[0242] In the above embodiment, the lid member 63 that constitutes the accommodation frame 61 together with the lower frame 62 and that contacts the gas in the accommodation space SP is a metal member. However, the present application is not limited to this, and the lid member 63 can be constituted by a material other than metal, such as resin. In addition, if the lid member 63 is constituted by metal, the heat dissipation of the heat transferred from the gas in the accommodation space SP can be improved.

[0243] In the above embodiment, the duct 64 that causes the gas flow that has passed through the flow port 713 to pass to the lid member 63 and the heat transfer member 65 is provided. However, the present application is not limited to this, and the light source device 4 can not have the duct 64. In addition, the light source device 4 can not have the duct that causes the gas flow that has passed through the flow port 713 to pass to the lid member 63 and the heat transfer member 65. That is, the gas flow that has passed through the flow port 713 can be caused to pass to the lid member 63 and the heat transfer member 65 by a structure other than the light source device 4, such as a member that is attached to the inner surface of the outer frame 2 or the outer frame 2.

[0244] In the above embodiment, the gas flow that has passed through the heat transfer member 65 is discharged to the outside of the light source device 4 via the exhaust port 66 that is constituted by the combination of the duct 64 and the heat transfer member 65. However, the present application is not limited to this, and the exhaust port 66 can be constituted only by the duct 64, or can be constituted only by the heat transfer member 65.

[0245] In the above embodiment, the flow passage 713 is constituted by a plurality of opening portions 714 provided separately from each other on the substrate 71, and the substrate 71 has a connection portion 715 connecting inner edges of the plurality of opening portions 714. However, the flow passage 713 can be one opening. In addition, the opening portions 714 constituting the flow passage 713 are not limited to two, and the flow passage 713 can be constituted by three or more opening portions 714.

[0246] In the above embodiment, the heat dissipating member 7 has the vapor cavity 72 provided on the substrate 71, and the plurality of fins 75 dissipate heat transferred from the vapor cavity 72. However, the heat dissipating member 7 can not have the vapor cavity 72. For example, heat of the light source 41 can be transferred to the plurality of fins 75 via the substrate 71. In addition, for example, the heat pipe 73 can transfer heat received from the substrate 71 to the plurality of fins 75.

[0247] In the above embodiment, the heat dissipating member 7 has the heat pipe 73 connecting the vapor cavity 72 and the plurality of fins 75. However, the heat dissipating member 7 can not have the heat pipe 73. In this case, the heat dissipating portion 723 of the vapor cavity 72 can be connected to the plurality of fins 75.

[0248] In the above embodiment, the fan 8 is an axial fan, and the flow passage 713 coincides with the fan 8 and is located on the peripheral edge side of the fan 8 than the center side of the fan 8 when the heat dissipating member 7 is viewed from the fan 8 side. However, the fan 8 can be a centrifugal fan such as a sirocco fan. In addition, the positional relationship between the flow passage 713 and the fan 8 is not limited to the above case, and for example, the flow passage 713 can be disposed at a position close to the center of the delivery range of the air current from the fan 8.

[0249] In the above embodiment, the projector 1 has three light modulating devices 343R, 343G, 343B. However, the present disclosure can be applied to a projector having two or less or four or more light modulating devices 343.

[0250] In the above embodiment, the light modulating device 343 is constituted by a transmissive liquid crystal panel having different light incident and outgoing surfaces. However, the light modulating device 343 can be constituted by a reflective liquid crystal panel having the same light incident and outgoing surfaces. In addition, as long as it is a light modulating device capable of modulating an incident light beam to form an image corresponding to image information, a light modulating device other than a liquid crystal, such as a device using a micromirror, for example, a component using a DMD (Digital Micromirror Device) or the like, can be employed in the projector 1.

[0251] In the above-described embodiments, an example in which the light source device 4 is applied to the projector 1 is described. However, the light source device 4 can be used alone or can be applied to a lighting device, without being limited thereto. That is, the light source device of the present disclosure can be used for electronic devices other than the projector 1.

[0252] [Summary of the disclosure]

[0253] Hereinafter, a summary of the disclosure is described.

[0254] [Note 1]

[0255] A light source device includes a light source that emits light, a heat dissipation member that dissipates heat of the light source, a wavelength conversion device that converts a wavelength of the light emitted from the light source, a housing that has a housing space that houses the light source and the wavelength conversion device, and a heat transfer member that is provided to the housing and constitutes a part of an outer surface of the housing, and is thermally connected to the wavelength conversion device, the heat dissipation member has a substrate to which heat of the light source is transferred, and a plurality of fins that are arranged on the substrate, the substrate has a flow passage that penetrates the substrate and causes a part of an airflow flowing to the heat dissipation member to flow to the heat transfer member.

[0256] According to such a configuration, a part of the airflow flowing to the heat dissipation member flows to the heat transfer member through the flow passage of the substrate, and the other airflow cools the heat dissipation member. Thereby, for example, the heat dissipation member connected to the light source and the heat transfer member connected to the wavelength conversion device can be cooled using the airflow flowing to the heat dissipation member from one fan, and further, the light source and the wavelength conversion device can be cooled. Therefore, compared to a case where a fan is provided for each of the light source and the wavelength conversion device, the number of fans can be reduced, and thus, the light source device can be downsized.

[0257] In addition, the airflow passing through the flow passage flows to the heat transfer member, and thus, compared to a case where the airflow cooling the entire heat dissipation member flows to the heat transfer member, the temperature of the airflow flowing to the heat transfer member can be reduced. In other words, the airflow having a relatively low temperature can flow to the heat transfer member.

[0258] Therefore, the light source device can be downsized while ensuring the cooling efficiency of the light source and the wavelength conversion device.

[0259] [Note 2]

[0260] The light source device according to Note 1, in which the heat transfer member has a plurality of columns provided to an outer surface of the heat transfer member.

[0261] According to such a structure, the contact area of the gas flow circulating to the heat transfer member with the heat transfer member can be enlarged, and therefore, heat of the wavelength conversion device transferred to the heat transfer member can be easily transferred to the gas flow circulating to the heat transfer member. Thus, the cooling efficiency of the wavelength conversion device can be improved.

[0262] [Note 3]

[0263] The light source device according to any one of Notes 1 to 2, wherein the wavelength conversion device has a motor, a rotating plate that rotates by the motor, and a phosphor layer that is provided to the rotating plate, converts the wavelength of incident light, and the heat transfer member is connected to the motor in a manner that enables heat transfer.

[0264] According to such a structure, the heat transfer member transfers heat transferred from the motor to the gas flow circulating to the heat transfer member, and therefore, the cooling efficiency of the motor can be improved, and further, the cooling efficiency of the wavelength conversion device can be improved.

[0265] [Note 4]

[0266] The light source device according to any one of Notes 1 to 3, wherein the housing frame includes a first outer surface of which at least a portion is constituted by the substrate, a second outer surface that intersects the first outer surface, and a third outer surface that intersects the first outer surface and the second outer surface, respectively, of which at least a portion is constituted by the heat transfer member, and the gas flow that has passed through the circulation opening circulates along the heat transfer member after circulating along the second outer surface.

[0267] According to such a structure, the gas flow that has passed through the circulation opening circulates along the heat transfer member after circulating along the second outer surface. Thus, in addition to enabling the gas flow to easily circulate along the heat transfer member, the gas flow circulating along the heat transfer member can be easily discharged, as compared to a case where the gas flow that has passed through the circulation opening directly circulates to the heat transfer member. Thus, the cooling efficiency of the heat transfer member can be improved, and further, the cooling efficiency of the wavelength conversion device can be improved.

[0268] [Note 5]

[0269] The light source device according to Note 4, wherein the heat transfer member has a heat receiving surface that is located on the side opposite to the surface constituting the third outer surface, and receives heat from the gas in the housing space.

[0270] According to such a structure, heat in the housing space received by the heat receiving surface is dissipated to the outside of the housing frame through the outer surface of the heat transfer member, and therefore, the temperature in the housing space can be reduced, and further, the cooling efficiency of the light source and the wavelength conversion device in the housing frame can be improved.

[0271] [Note 6]

[0272] The light source device according to any one of the above 4 or 5, wherein at least a portion of the second outer surface is composed of a metal member heated by the gas in the housing space.

[0273] According to this structure, the gas flow that has passed through the flow passage is circulated to the heat transfer member after cooling the metal member heated by the gas in the housing space. Thus, the temperature in the housing space can be reduced, and therefore the light source and the wavelength conversion device can be cooled inside the housing. Thus, the cooling efficiency of the light source and the wavelength conversion device can be improved.

[0274] [Note 7]

[0275] The light source device according to any one of the above 1 to 6, wherein the light source device has a duct that guides the gas flow that has passed through the flow passage to the heat transfer member.

[0276] According to this structure, the gas flow that has passed through the flow passage can be easily circulated to the heat transfer member. Thus, compared to a case where the gas flow that has passed through the flow passage is circulated to the heat transfer member while diffusing, the cooling efficiency of the heat transfer member, and therefore the cooling efficiency of the wavelength conversion device, can be improved.

[0277] Further, in a structure where the gas flow that has passed through the flow passage is circulated to the heat transfer member after being circulated along the above-mentioned second outer surface, in a case where at least a portion of the second outer surface is composed of the above-mentioned metal member, the gas flow can be easily circulated to the metal member by the duct. Thus, the cooling efficiency of the light source and the wavelength conversion device can be improved.

[0278] [Note 8]

[0279] The light source device according to the above 7, wherein the light source device has a discharge port formed by at least one of the duct and the heat transfer member, provided on a downstream side of a flow direction of the gas flow that is circulated in the heat transfer member, and discharging the gas flow that has been circulated in the heat transfer member.

[0280] According to this structure, the gas flow that is circulated in the heat transfer member can be quickly discharged. Thus, compared to a case where the gas flow that is circulated in the heat transfer member stagnates, the cooling efficiency of the heat transfer member, and therefore the cooling efficiency of the wavelength conversion device, can be improved.

[0281] [Note 9]

[0282] The light source device according to any one of the above 1 to 8, wherein the flow passage is composed of a plurality of opening portions that are provided separately from each other on the substrate, and the substrate has a connection portion that is provided between the plurality of opening portions and connects inner edges of the plurality of opening portions to each other.

[0283] According to such a structure, the substrate can be strengthened by the connecting portion provided between the plurality of opening portions constituting the flow-through port. Further, the wiring extending from the light source can be arranged in the connecting portion.

[0284] [Para 10]

[0285] The light source device according to any one of Paras 1 to 9, wherein the flow-through port and at least one of the plurality of fins overlap each other when viewed in a flow-through direction of the airflow with respect to the heat radiating member.

[0286] According to such a structure, at least one of the plurality of fins through which heat of the light source is transmitted overlaps the flow-through port when viewed in a flow-through direction of the airflow with respect to the heat radiating member, and thus the airflow cooled by the at least one fin can flow to the heat transmitting member. Therefore, as compared with a case where a part of the airflow flowing to the heat radiating member passes through the flow-through port without passing through the fin, it is possible to suppress a decrease in cooling efficiency of the light source.

[0287] Further, generally, an upper limit of an allowable temperature range of the wavelength conversion device is higher than an upper limit of an allowable temperature range of the light source, and thus even if the airflow flowing through the at least one fin flows to the heat transmitting member and the wavelength conversion device is cooled, it is possible to easily cause the temperatures of the light source and the wavelength conversion device to converge in the respective allowable temperature ranges.

[0288] [Para 11]

[0289] The light source device according to any one of Paras 1 to 10, wherein the heat radiating member has a vapor cavity provided to the substrate, the vapor cavity being heated by the light source, and the plurality of fins radiate heat transmitted from the vapor cavity.

[0290] According to such a structure, the vapor cavity has high heat diffusion performance, and thus it is possible to rapidly transmit heat of the light source from the substrate to the plurality of fins.

[0291] [Para 12]

[0292] The light source device according to Para 11, wherein the heat radiating member has a heat pipe that transports heat, the heat pipe having a heat receiving portion connected to the vapor cavity and a heat radiating portion connected to at least one of the plurality of fins, and radiates heat received by the heat receiving portion to the at least one fin.

[0293] According to such a structure, it is possible to easily transmit heat to a fin that is difficult to transmit heat from the vapor cavity among the plurality of fins by using the heat pipe. Therefore, it is possible to efficiently transmit heat to the plurality of fins, and further, it is possible to easily transmit heat from the plurality of fins to the airflow flowing to the heat radiating member. Thus, it is possible to improve the cooling efficiency of the light source.

[0294] [Para 13]

[0295] A projector having the light source device according to any one of the items 1 to 12; a light modulation device that modulates light emitted from the light source device; a projection optical device that projects light modulated by the light modulation device; and a fan that causes air current to flow to the heat dissipation member.

[0296] According to such a configuration, the same effects as the light source device described above can be obtained.

[0297] [Item 14]

[0298] The projector according to item 13, wherein the fan is an axial fan, and the flow passage coincides with the fan and is located on a position closer to a peripheral edge side of the fan than to a center side of the fan when the heat dissipation member is viewed from the fan side.

[0299] Generally, the flow rate distribution of air current sent out by an axial fan is that the closer to the center of the axial fan, the greater the flow rate, and the air volume becomes smaller toward the peripheral edge. Therefore, by sending out the air current sent out from a position close to the center of the axial fan to the plurality of fins, the cooling efficiency of the light source can be ensured, and by causing the air current on the peripheral edge side of the fan to flow to the heat dissipation member from the flow passage, the cooling efficiency of the wavelength conversion device can be ensured.

Claims

1. A light source device, characterized in that, It has the following characteristics: A light source, which emits light; A heat dissipation component that dissipates heat from the light source; A wavelength conversion device that converts the wavelength of light emitted from the light source; The storage frame has a storage space for accommodating the light source and the wavelength conversion device; and A heat transfer component, disposed on the housing frame and forming part of the outer surface of the housing frame, is thermally connected to the wavelength conversion device. The heat dissipation component has: Substrate, to which the heat of the light source is transferred; and Multiple fins are disposed on the substrate. The substrate has a flow port that extends through the substrate, allowing a portion of the airflow flowing to the heat dissipation component to flow to the heat transfer component.

2. The light source device according to claim 1, characterized in that, The heat transfer component has a plurality of pillars disposed on the outer surface of the heat transfer component.

3. The light source device according to claim 1 or 2, characterized in that, The wavelength conversion device has: Electric motor; A rotating plate, which is rotated by the motor; and A phosphor layer, disposed on the rotating plate, converts the wavelength of incident light. The heat transfer component is connected to the motor in a manner that enables heat transfer.

4. The light source device according to claim 1 or 2, characterized in that, The storage frame includes: The first outer surface, at least a portion of which is formed by the substrate; The second outer surface, which intersects with the first outer surface; and The third outer surface, which intersects with both the first and second outer surfaces, is at least partially composed of the heat transfer component. The airflow that has passed through the flow port flows along the second outer surface and then along the heat transfer component.

5. The light source device according to claim 4, characterized in that, The heat transfer component has a heated surface located on the side opposite to the surface constituting the third outer surface, and is heated from the gas within the receiving space.

6. The light source device according to claim 4, characterized in that, At least a portion of the second outer surface is made of a metal component heated by gas within the receiving space.

7. The light source device according to claim 1 or 2, characterized in that, The light source device has a conduit that guides the airflow through the flow port to the heat transfer component.

8. The light source device according to claim 7, characterized in that, The light source device has an outlet formed by at least one of the pipe and the heat transfer component, located downstream of the flow direction of the airflow flowing in the heat transfer component, to discharge the airflow that has flowed in the heat transfer component.

9. The light source device according to claim 1 or 2, characterized in that, The flow port is composed of multiple openings that are separated from each other on the substrate. The substrate has a connecting portion disposed between the plurality of openings, which connects the inner edges of the plurality of openings.

10. The light source device according to claim 1 or 2, characterized in that, When viewed along the airflow direction relative to the heat dissipation component, the airflow port coincides with at least one of the plurality of fins.

11. The light source device according to claim 1 or 2, characterized in that, The heat dissipation component has a vapor chamber disposed on the substrate, which receives heat from the light source. The plurality of fins dissipate heat transferred from the vapor chamber.

12. The light source device according to claim 11, characterized in that, The heat dissipation component has heat pipes for transporting heat. The heat pipe has: The heated part, which is connected to the steam chamber; and A heat dissipation section, which is connected to at least one of the plurality of fins, dissipates heat received by the heat-receiving section to the at least one fin.

13. A projector, characterized in that, It has the following characteristics: The light source device according to claim 1 or 2; An optical modulation device that modulates light emitted from the light source device; A projection optical device that projects light modulated by the light modulation device; as well as A fan directs airflow toward the heat dissipation components.

14. The projector according to claim 13, characterized in that, The fan is an axial flow fan. The flow port overlaps with the fan when the heat dissipation component is viewed from the fan side and is located on the periphery side of the fan, closer to the center side of the fan.

Images