Light source device and projector

Abstract

To provide a light source device and projector that can be miniaturized while ensuring the cooling efficiency of the light source and wavelength conversion device. [Solution] The light source device comprises a light source that emits light, a heat dissipation member that dissipates heat from the light source, a wavelength conversion device that converts the wavelength of light emitted from the light source, a housing having a housing space for housing the light source and the wavelength conversion device, and a heat transfer member provided in the housing, forming a part of the outer surface of the housing, and thermally connected to the wavelength conversion device. The heat dissipation member has a substrate to which heat from the light source is transferred, and a plurality of fins arranged on the substrate. The substrate has a flow port that penetrates the substrate and allows a part of the airflow 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 Art

[0002] Conventionally, a light source device having a light source and a phosphor has been known (see, for example, Patent Documents 1 and 2). The light source device described in Patent Document 1 includes a solid-state light source, a light source heat sink, a phosphor section, a motor, a phosphor heat sink, a first intake fan, a first exhaust fan, and a second intake fan. The solid-state light source has a first light source and a second light source, and a light source heat sink is disposed on a surface opposite to the light emitting surface of each light source. A first intake fan is disposed on the upstream side and a first exhaust fan is disposed on the downstream side in the flow direction of the first cooling air with respect to the light source heat sink. The phosphor section includes a wheel, a phosphor applied in an arc shape on the wheel, and a light-transmitting member on which the phosphor is not applied on the wheel, and is rotated by a motor. The phosphor section is fixed to a lid member of an optical system box that houses the optical system and is covered with a phosphor case. Phosphor heat sinks are provided on both sides sandwiching the phosphor case, and a second intake fan is disposed on the upstream side in the flow direction of the second cooling air with respect to the phosphor heat sink.

[0003] The light source device described in Patent Document 2 includes a light source section, a condenser lens, a fluorescent plate wheel, a drive motor, and a cooling device. The blue light emitted from the light source section is condensed by the condenser lens and enters the fluorescent plate wheel that rotates by the drive motor. On the emission-side surface of the fluorescent plate wheel, a phosphor region containing a green phosphor, a phosphor region containing a red phosphor, and a blue transmission region are formed concentrically, and green light, red light, and blue light are emitted from the fluorescent plate wheel in a time-division manner. The cooling device comprises a heat pipe connected to the base plate of the light source, multiple fins for cooling the heat pipe, and a fan. A portion of the phosphor wheel is positioned between the fins. Air, which is the cooling medium on the side where the phosphor wheel is positioned, is drawn in by the fan and circulates between the fins. This cools the phosphor wheel and the multiple fins, and consequently cools the phosphor wheel and the light source. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-024355 [Patent Document 2] Japanese Patent Publication No. 2016-051073 [Overview of the project] [Problems that the invention aims to solve]

[0005] However, in the light source device described in Patent Document 1, the solid light source and the phosphor section are cooled by separate cooling mechanisms, which allows for effective cooling of both the solid light source and the phosphor section, but this has the problem that the size of the light source device tends to increase. Therefore, as described in Patent Document 2, it is conceivable to arrange a phosphor wheel and multiple fins on the flow path of a cooling medium that is drawn in by a fan. However, in this configuration, the cooling medium that has cooled the phosphor wheel located upstream in the flow path of the cooling medium drawn in by the fan flows through only some of the fins. This leads to a problem where the cooling efficiency of the fins, i.e., the cooling efficiency of the light source, tends to be low. On the other hand, if one tries to ensure the cooling efficiency of both the light source and the phosphor wheel, it is necessary to enlarge the fins and the fan, which leads to a problem where the size of the light source device tends to increase. For these reasons, there has been a demand for a light source device configuration that can achieve overall miniaturization while ensuring the cooling efficiency of both the light source and the phosphor. [Means for solving the problem]

[0006] A light source device according to a first aspect of the present disclosure comprises a light source that emits light, a heat dissipation member that dissipates heat from the light source, a wavelength conversion device that converts the wavelength of light emitted from the light source, a housing having a housing space for housing the light source and the wavelength conversion device, and a heat transfer member provided in the housing housing and constituting a part of the outer surface of the housing housing, and thermally connected to the wavelength conversion device, wherein the heat dissipation member has a substrate to which heat from the light source is transferred, and a plurality of fins arranged on the substrate, and the substrate has a flow port that penetrates the substrate and allows a part of the airflow flowing to the heat dissipation member to flow to the heat transfer member.

[0007] A projector according to a second aspect of the present disclosure comprises a light source device according to the first aspect, an optical modulator for modulating light emitted from the light source device, a projection optical device for projecting the light modulated by the optical modulator, and a fan for circulating airflow to the heat dissipation member. [Brief explanation of the drawing]

[0008] [Figure 1] A perspective view showing the external appearance of a projector in one embodiment. [Figure 2] A schematic diagram showing the configuration of an image projection device in one embodiment. [Figure 3] A schematic diagram showing the configuration of a light source device in one embodiment. [Figure 4] A perspective view showing a wavelength conversion device and a heat transfer component in one embodiment. [Figure 5] A perspective view showing a light source device in one embodiment. [Figure 6] A perspective view showing a light source device in one embodiment. [Figure 7] An exploded perspective view showing a light source device in one embodiment. [Figure 8]Exploded perspective view showing a light source device in one embodiment. [Figure 9] Exploded perspective view showing a heat dissipation member in one embodiment. [Figure 10] Exploded perspective view showing a heat dissipation member in one embodiment. [Figure 11] Perspective view showing the arrangement of a light source device and a fan in one embodiment. [Figure 12] Side view showing a light source device and a fan in one embodiment. [Figure 13] Diagram showing the positional relationship between the flow port of a substrate and a fan in one embodiment. [Figure 14] Diagram showing the positional relationship between the flow port of a substrate, a heat pipe, and fins in one embodiment. [Figure 15] Diagram showing the airflow sent out from a fan in one embodiment. [Figure 16] Diagram showing the airflow sent out from a fan in one embodiment. [Mode for Carrying Out the Invention]

[0009] Hereinafter, one embodiment of the present disclosure will be described based on the drawings. [Schematic Configuration of Projector] FIG. 1 is a perspective view showing the appearance of a projector 1 according to the present embodiment. The projector 1 according to the present embodiment is a display device that modulates light emitted from a light source device to form image light corresponding to an image signal and projects the formed image light onto a projection surface. As shown in FIG. 1, the projector 1 includes an exterior housing 2.

[0010] [Configuration of Exterior Housing] The exterior housing 2 has a front portion 21, a rear portion 22, a top portion 23, a bottom portion 24, a right side portion 25, and a left side portion 26, and is formed in a substantially rectangular parallelepiped shape. The front surface portion 21 has a projection port 211, a plurality of indicators 212, and a first inlet 213. The projection port 211 exposes a part of the 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 indicate the state of the projector 1. The first inlet 213 is provided on the left side surface portion 26 side with respect to the projection port 211 and introduces the air outside the exterior housing 2 into the interior of the exterior housing 2 as cooling gas. Although details will be described later, inside the exterior housing 2, a fan 8 described later is arranged according to the first inlet 213, and the cooling gas sucked by the fan 8 through the first inlet 213 is sent to the light source device 4 as an air current.

[0011] On the top surface portion 23, two dials DA1 and DA2 for operating a lens shift mechanism described later are exposed. On the bottom surface portion 24, a plurality of legs 241 that contact the installation surface on which the projector 1 is installed are provided. The right side surface portion 25 has a second inlet for introducing the air outside the exterior housing 2 into the interior of the exterior housing 2 as cooling gas, although detailed illustration is omitted.

[0012] The left side surface portion 26 has three discharge ports 261, 262, and 263. The discharge port 261 is provided at a position on the left side surface portion 26 closer to the front surface portion 21 side. The discharge port 261 discharges the air current that has passed through the heat sink 74 of the light source device 4 described later. The discharge port 262 is provided at a position on the left side surface portion 26 closer to the back surface portion 22 side. The discharge port 262 discharges the air current that has been introduced into the interior of the exterior housing 2 from the second inlet of the right side surface portion 25 and has cooled the cooling target inside the exterior housing 2. The discharge port 263 is provided at a position on the left side surface portion 26 between the discharge ports 261 and 262 and closer to the bottom surface portion 24 side. The discharge port 263 discharges the air current that has passed through the heat transfer member 65 of the light source device 4 described later. Note that the flow of the air current sent from the fan 8 to cool the heat sink 74 and the heat transfer member 65 will be described in detail later.

[0013] [Configuration of the image projection device] Figure 2 is a schematic diagram showing the configuration of the image projection device 3. The projector 1 includes an image projection device 3 housed inside the outer casing 2. The image projection device 3 projects image light corresponding to the image signal. As shown in Figure 2, the image projection device 3 comprises a light source device 4, a uniformizing device 31, a color separation device 32, a relay device 33, an image forming device 34, an optical component housing 35, and a projection optical device 36, as well as a lens shift mechanism (not shown).

[0014] Light source device 4 emits light. The configuration of light source device 4 will be described in detail later. The uniformizing device 31 equalizes the illuminance distribution of the light emitted from the light source device 4. The light with the equalized illuminance distribution passes through the color separation device 32 and the relay device 33 to illuminate the modulation region of the light modulation device 343 of the image forming apparatus 34, which will be described later. The uniformizing device 31 includes two lens arrays 311 and 312, a polarization conversion element 313, and a superimposed lens 314. The color separation device 32 separates the light incident from the uniformizing device 31 into red, green, and blue light. The color separation device 32 comprises two dichroic mirrors 321 and 322, and a reflective mirror 323 that reflects the blue light separated by the dichroic mirror 321.

[0015] The relay device 33 is installed in the optical path of the red light, which is longer than the optical paths of the other colored light, in order to suppress the loss of red light. The relay device 33 comprises an incident lens 331, a relay lens 333, and reflective mirrors 332 and 334. In this embodiment, the relay device 33 is installed on the optical path of the red light. However, this is not the only option; for example, the colored light with a longer optical path than the other colored light may be blue light, and the relay device 33 may be installed on the optical path of the blue light.

[0016] The image forming apparatus 34 forms image light from light emitted from the light source device 4. Specifically, the image forming apparatus 34 modulates the incident red, green, and blue light, and synthesizes the modulated light to form image light. The image forming apparatus 34 includes three field lenses 341, three incident polarizers 342, three light modulators 343, three field angle compensating plates 344, and three outgoing polarizers 345, which are provided according to the color of the incident light, and one color synthesis element 346. The optical modulator 343 modulates the incident light according to the image information. The optical modulator 343 includes an optical modulator 343R for red light, an optical modulator 343G for green light, and an optical modulator 343B for blue light. In this embodiment, the optical modulator 343 is made up of a transmissive liquid crystal panel, and the liquid crystal light bulb is made up of an incident polarizer 342, an optical modulator 343, and an exit polarizer 345. The color synthesis element 346 synthesizes the colored light modulated by the light modulators 343B, 343G, and 343R to form image light. In this embodiment, the color synthesis element 346 is composed of a cross dichroic prism, but it is not limited to this and can also be composed of, for example, multiple dichroic mirrors.

[0017] The optical component housing 35 houses the above-described devices 31 to 34 inside. The image projection device 3 has an illumination optical axis Ax, which is the optical axis in its design, and the optical component housing 35 holds the devices 31 to 34 at predetermined positions along the illumination optical axis Ax. The light source device 4 and the projection optical device 36 are positioned at predetermined positions along the illumination optical axis Ax. The projection optical device 36 is a projection lens that magnifies and projects the image light formed by the image forming apparatus 34 onto the projection surface. In other words, the projection optical device 36 projects light modulated by the light modulation devices 343B, 343G, and 343R. The projection optical device 36 is configured as a lens assembly in which multiple lenses are housed within a cylindrical lens barrel 361, for example. The lens shift mechanism moves the lens barrel 361 in a direction perpendicular to the optical axis of the lens of the projection optical device 36. When one of the dials DA1 and DA2 is operated, the lens shift mechanism moves the lens barrel 361 along the direction connecting the top surface 23 and the bottom surface 24. When the other dial of DA1 and DA2 is operated, the lens shift mechanism moves the lens barrel 361 along the direction connecting the right side surface 25 and the left side surface 26. This changes the projection position of the image light from the projection optical device 36 on the projection surface.

[0018] [Configuration of the light source device] Figure 3 is a schematic diagram showing the configuration of the light source device 4. The light source device 4 emits illumination light to the optical modulation device 343 of the image forming apparatus 34 to the uniformizing device 31. As shown in Figure 3, the light source device 4 includes a light source 41, an afocal optical element 42, a first phase difference element 43, a diffuse transmission element 44, an optical separation and synthesis element 45, a second phase difference element 46, a first light concentrator 47, a diffuse optical element 48, a second light concentrator 49, a wavelength conversion device 50, and a third phase difference element 51, as well as a light source housing 6 that accommodates these components. The light source housing 6 will be described in detail later.

[0019] The light source device 4 has an optical axis Ax1 that extends in a straight line, and an optical axis Ax2 that is perpendicular to optical axis Ax1 and extends in a straight line. Optical axis Ax2 coincides with the illumination optical axis Ax in the uniformization device 31. The light source 41, afocal optical element 42, first phase difference element 43, diffuse transmission element 44, light separation and synthesis element 45, second phase difference element 46, first light focusing element 47, and diffuse optical element 48 are arranged on the optical axis Ax1. The wavelength conversion device 50, the second light concentrating element 49, the light separation and synthesis element 45, and the third phase difference element 51 are arranged on the optical axis Ax2. In the following description, the three mutually orthogonal directions are referred to as the +X direction, the +Y direction, and the +Z direction. In this 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 part 21 to the back part 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 part 26 to the right side part 25. The +Y direction is also the direction from the bottom part 24 to the top part 23. Although not shown in the illustration, the direction opposite to the +X direction is referred to as the -X direction, the direction opposite to the +Y direction is referred to as the -Y direction, and the direction opposite to the +Z direction is referred to as the -Z direction.

[0020] [Light source configuration] The light source 41 comprises at least one solid-state light-emitting element 411, which 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, which is excitation light. For example, the solid-state light-emitting element 411 is a laser diode (LD) 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, which will be described later. The light emitted by the light source 41 is s-polarized blue light BLs directed to the light separation and synthesis element 45. However, the light emitted by the light source 41 may also be p-polarized blue light BLp directed to the light separation and synthesis element 45, or it may be blue light containing a mixture of s-polarized and p-polarized light. In the latter case, the first phase difference element 43 can be omitted.

[0021] [Configuration of afocal optical elements] The afocal optical element 42 adjusts the beam diameter of blue light BLs incident from the light source 41 in the +X direction. The afocal optical element 42 consists of a lens 421 that focuses the incident light and a lens 422 that parallelizes the light beam focused by the lens 421. The afocal optical element 42 is optional.

[0022] [Configuration of the first phase difference element] The first phase difference element 43 is provided between lens 421 and lens 422. The first phase difference element 43 converts a portion of the incident blue light BLs into blue light BLp, and emits light containing both s-polarized blue light BLs and p-polarized blue light BLp. The first phase difference element 43 is rotated by a rotating device (not shown) about a rotation axis along the optical axis Ax1, thereby adjusting the ratio of s-polarized and p-polarized components in the blue light emitted from the first phase difference element 43 according to the rotation angle of the first phase difference element 43. However, the first phase difference element 43 may be configured not to rotate.

[0023] [Configuration of the diffuse transmission element] The diffuse transmission element 44 equalizes the illuminance distribution of blue light BLp and BLs incident from lens 422 in the +X direction. The blue light BLs and BLp that have passed through the diffuse transmission element 44 are incident on the light separation and synthesis element 45. The diffuse transmission element 44 can be exemplified by a configuration having a hologram, a configuration in which a plurality of small lenses are arranged in a plane orthogonal to the optical axis, and a configuration in which the surface through which light passes is a rough surface. Alternatively, a homogenizer optical element having a pair of multi-lenses may be used instead of the diffuse transmission element 44.

[0024] [Configuration of the photo-separating and synthesizing element] The light separation and synthesis element 45 has the function of a light separation element that separates incident light, and the function of a photosynthesis element that synthesizes light incident from two directions. The light separation and synthesis element 45 is a polarizing beam splitter that separates the s-polarized and p-polarized components contained in the incident light. Specifically, the light separation and synthesis element 45 reflects the s-polarized component and transmits the p-polarized component. Furthermore, the light separation and synthesis element 45 has a color separation characteristic that transmits light of a predetermined wavelength or greater, regardless of whether it is the s-polarized or p-polarized component. Therefore, of the blue light BLp and BLs incident from the diffusion transmission element 44 to the light separation and synthesis element 45, the p-polarized blue light BLp is transmitted through the light separation and synthesis element 45 in the +X direction and incident on the second phase difference element 46. On the other hand, the s-polarized blue light BLs is reflected in the -Z direction by the light separation and synthesis element 45 and incident on the second light concentrating element 49. The light separation and synthesis element 45 may also have the function of a half-mirror that allows some of the light incident from the light source 41 via the diffusion transmission element 44 to pass through and reflects the remaining light, and the function of a dichroic mirror that reflects the blue light incident from the diffusion optical element 48 and transmits the fluorescence incident from the wavelength conversion device 50 that has a wavelength longer than the wavelength of blue light. In this case, the first phase difference element 43 can be omitted.

[0025] [Configuration of the second phase difference element] The second phase difference element 46 is positioned in the +X direction relative to the light separation and synthesis element 45. That is, the second phase difference element 46 is positioned between the light separation and synthesis element 45 and the first light concentrating element 47. The second phase difference element 46 converts the blue light BLp that has passed through the light separation and synthesis element 45 in the +X direction into circularly polarized blue light BLc. The blue light BLc that has passed through the second phase difference element 46 in the +X direction is incident on the first light concentrating element 47.

[0026] [Configuration of the first light-gathering element] The first light-gathering element 47 focuses the blue light BLc that passes through the light separation and synthesis element 45 in the +X direction and is incident from the second phase difference element 46 onto the diffuse optical element 48. The first light-gathering element 47 also parallelizes the light incident from the diffuse optical element 48 in the -X direction and emits it onto the second phase difference element 46. In this embodiment, the first light-gathering element 47 is composed of three lenses 471, 472, and 473, but the number of lenses constituting the first light-gathering element 47 is not limited.

[0027] [Configuration of Diffuse Optical Elements] The diffusing optical element 48 diffuses the incident blue light BLc at a diffusion angle similar to that of the fluorescent YL emitted from the wavelength conversion device 50. Specifically, the diffusing optical element 48 reflects and diffuses the blue light BLc incident in the +X direction from the first light-gathering element 47 in the -X direction. The diffusing optical element 48 is a reflecting element that performs Lambertian reflection on the incident blue light BLc. The diffusing optical element 48 may be rotated by a rotation device around a rotation axis parallel to the optical axis Ax2. The blue light BLc diffused by the diffusing optical element 48 passes through the first focusing element 47 in the -X direction and then enters the second phase difference element 46. When the blue light BLc that enters the diffusing optical element 48 is reflected by the diffusing optical element 48, it is converted into circularly polarized light with the opposite direction of rotation. Therefore, the blue light BLc that enters the second phase difference element 46 via the first focusing element 47 is converted into 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 separation and synthesis element 45 and enters the third phase difference element 51.

[0028] [Configuration of the second light-gathering element] The second light-gathering element 49 focuses the blue light BLs reflected in the -Z direction by the light separation and synthesis element 45 onto the phosphor layer 503 of the phosphor wheel 501, which is part of the wavelength conversion device 50. The second light-gathering element 49 also parallelizes the fluorescent light YL incident from the phosphor layer 503 in the +Z direction and emits the parallelized fluorescent light YL to the light separation and synthesis element 45. In this embodiment, the second light-gathering element 49 is composed of three lenses 491, 492, and 493, but the number of lenses constituting the second light-gathering element 49 is not limited.

[0029] [Outline configuration of the wavelength conversion device] The wavelength conversion device 50 converts the wavelength of the blue light BLs incident from the second light-gathering element 49 in the -Z direction and emits fluorescent YL in the +Z direction. In other words, the wavelength conversion device 50 is a so-called reflective type wavelength conversion device, and emits unpolarized fluorescent YL having a wavelength longer than the wavelength of the blue light BLs in the direction opposite to the incident direction of the excitation light, the blue light BLs. The fluorescent YL is light containing green and red light, and is light containing s-polarized and p-polarized components for the light separation and synthesis element 45. The configuration of the wavelength conversion device 50 will be described in detail later.

[0030] The fluorescent YL emitted from the wavelength conversion device 50 in the +Z direction is parallelized by the second light concentrator 49 and then incident on the light separation and synthesis element 45. As described above, since the light separation and synthesis element 45 has the characteristic of transmitting fluorescent YL, the fluorescent YL incident on the light separation and synthesis element 45 along the +Z direction passes through the light separation and synthesis element 45 and is incident on the third phase difference element 51. In other words, the light incident on the third phase difference element 51 from the light separation and synthesis element 45 is white light containing a mixture of blue light BLs and fluorescent YL.

[0031] [Configuration of the third phase difference element] The third phase difference element 51 converts the blue light BLs and white light containing fluorescence YL incident from the light separation and synthesis element 45 into white light containing a mixture of s-polarized and p-polarized light. This converted white light is emitted in the +Z direction as illumination light LT and incident on the homogenization device 31 described above.

[0032] [Configuration of the wavelength conversion device] Figure 4 is a perspective view showing the wavelength conversion device 50 and the heat transfer member 65. The wavelength conversion device 50 converts the wavelength of the blue light BLs incident from the second light-gathering element 49 to emit fluorescent YL. As shown in Figures 3 and 4, the wavelength conversion device 50 includes a phosphor wheel 501, a drive unit 505, and a hub 506. The drive unit 505 is a motor and is connected to the phosphor wheel 501 via a hub 506. The drive unit 505 rotates the phosphor wheel 501 around a rotation axis Rx that is aligned with the optical axis Ax2 by rotating the hub 506. In other words, the hub 506 is a connecting member that connects the phosphor wheel 501 and the drive unit 505. A cable CA extends from the drive unit 505.

[0033] The phosphor wheel 501 comprises a rotating plate 502, a phosphor layer 503, and a reflective section 504. The rotating plate 502 supports the phosphor layer 503 and the reflector 504. The rotating plate 502 is rotated about the rotation axis Rx by the drive unit 505. The rotating plate 502 has a first surface 5021, a second surface 5022, an opening 5023, and a plurality of fins 5024. Face 1, 5021, is the face facing the +Z direction. The second face 5022 is the face opposite to the first face 5021 and faces in the -Z direction. The opening 5023 is located in the central part 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. Multiple fins 5024 are provided on the outside of the opening 5023 on the second surface 5022. Although detailed illustration is omitted, each of the multiple fins 5024 extends outward from the part on the rotation axis Rx side toward the outside of the rotating plate 502. In this embodiment, each fin 5024 extends in a curved shape so that it is positioned in the opposite direction to the rotation direction of the rotating plate 502 as it moves outward from the end on the rotation axis Rx side toward the outside of the rotating plate 502. However, the extension direction of each fin 5024 is not limited to this and can be changed as appropriate.

[0034] The phosphor layer 503 is arranged in a ring shape around the rotation axis Rx outside the opening 5023 on the first surface 5021. The phosphor layer 503 contains a phosphor that converts the wavelength of the blue light BLs incident from the second light-gathering element 49. That is, the phosphor layer 503 is excited by the blue light BLs, which are the excitation light, and emits fluorescence YL. The phosphor layer 503 generates heat upon the incidence of the blue light BLs. Of the heat generated in the phosphor layer 503, some is dissipated directly from the phosphor layer 503, and the rest is transferred to the rotating plate 502 via the reflector 504 and dissipated therefrom. The reflective portion 504 is provided between the phosphor layer 503 and the first surface 5021, and reflects light incident from the phosphor layer 503 in the +Z direction. Note that if the first surface 5021 can be used as a reflective surface, the reflective portion 504 may be omitted.

[0035] When the phosphor wheel 501 is rotated by the drive unit 505, gas is drawn in from the space on the first surface 5021 side, generating an airflow that flows from the opening 5023 to the second surface 5022 side. This airflow flows between a plurality of fins 5024 provided on the second surface 5022 toward the outside of the rotating plate 502. As a result, the heat generated in the phosphor layer 503 and transferred to the plurality of fins 5024 is transferred to this airflow, and the phosphor layer 503 is cooled. The heat from the airflow that has cooled the plurality of fins 5024 is received by a heat transfer member 65 connected to the end in the -Z direction of the drive unit 505 and dissipated to the outside of the light source housing 6.

[0036] [Configuration of the light source enclosure] As shown in Figure 3, the light source housing 6 has a housing space SP that accommodates the light source 41, afocal optical element 42, first phase difference element 43, diffuse transmission element 44, light separation and synthesis element 45, second phase difference element 46, first light concentrating element 47, diffuse optical element 48, second light concentrating element 49, wavelength conversion device 50, and third phase difference element 51. The light source housing 6 is a sealed housing that makes it difficult for dust and other particles to enter the interior.

[0037] Figure 5 is a perspective view showing the light source device 4 from the -X direction, and Figure 6 is a perspective view showing the light source device 4 from the +X direction. As shown in Figures 5 and 6, the light source housing 6 includes a housing 61, a duct 64, a heat transfer member 65, an exhaust port 66, and a heat dissipation member 7.

[0038] [Configuration of the housing cabinet] The housing 61 corresponds to the housing of this disclosure. The housing 61 has a first surface 611, a second surface 612, a third surface 613, a fourth surface 614, a fifth surface 615, and a sixth surface 616. The first surface 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, which will be described later, is attached to the first surface 611. That is, at least a part of the first surface 611 is made up of the substrate 71. The second surface 612 is a surface facing the +Y direction and corresponds to the second outer surface that intersects with the first surface 611. At least a portion of the second surface 612 is formed by the cover member 63. The third surface 613 is a surface facing the -Z direction and corresponds to a third outer surface that intersects with the first surface 611 and the second surface 612, respectively. At least a portion of the third surface 613 is composed of a heat transfer member 65. The fourth face 614 is the face facing the +X direction and is the face opposite to the first face 611. The fifth face 615 is the face facing the -Y direction and is the face opposite to the second face 612. The sixth surface 616 is the surface facing the +Z direction and is the surface opposite to the third surface 613. The sixth surface 616 is the surface from which the illumination light LT that has passed through the third phase difference element 51 is emitted.

[0039] Figure 7 is an exploded perspective view showing the light source device 4 as seen from the -X and +Y directions, and Figure 8 is an exploded perspective view showing the light source device 4 as seen from the +X and -Y directions. As shown in Figure 7, the housing enclosure 61 has the above-described housing space SP. As shown in Figures 7 and 8, the housing enclosure 61 comprises a lower housing 62 and a lid member 63, and the lower housing 62 and the lid member 63 are combined to form the housing enclosure 61. The lower housing 62 is a box-shaped housing that mainly constitutes the -Y direction portion of the housing housing 61. As shown in Figure 7, the lower housing 62 has a housing recess 62A that forms the housing space SP. The housing recess 62A is a recess in the lower housing 62 that is recessed in the -Y direction from the +Y direction surface.

[0040] As shown in Figure 7, the lid member 63 is a metal member attached to the lower housing 62 so as to cover the housing recess 62A in the +Y direction. Here, the temperature of the gas in the containment space SP rises due to the heat generated by the light source 41 and the wavelength conversion device 50, which are located within the containment space SP. In other words, the temperature of the gas in the containment space SP rises when the light source device 4 is turned on. In contrast, the lid member 63 is in contact with the gas in the containment space SP, and the lid member 63 receives heat from the gas in the containment space SP and dissipates that heat to the outside of the containment housing 61, thereby lowering the temperature inside the containment space SP. Furthermore, the airflow that has passed through the flow port 713 of the substrate 71 (described later) flows through the lid member 63, and the lid member 63 transfers the heat it has received from the gas in the containment space SP to the airflow.

[0041] [Configuration of heat dissipation components] Figure 9 is an exploded perspective view showing the heat dissipation member 7 as seen from the -X and +Y directions, and Figure 10 is an exploded perspective view showing the heat dissipation member 7 as seen from the +X and -Y directions. The heat dissipation member 7 dissipates the heat transferred from the light source 41, thereby cooling the light source 41. As shown in Figures 9 and 10, the heat dissipation member 7 comprises a substrate 71, a heat pipe 73, a heat sink 74, and an air guide member 76.

[0042] [Circuit board configuration] As shown in Figure 9, the substrate 71 is a plate formed in a substantially rectangular shape when viewed from the -X direction, and is attached to the first surface 611 of the housing 61 by mounting members such as screws. That is, the substrate 71 constitutes at least a part of the first surface 611. Although detailed illustration is omitted, the solid-state light-emitting element 411 of the light source 41 described above is fixed to the surface of the substrate 71 facing the +X direction. In other words, the substrate 71 supports the light source 41, and heat from the light source 41 is transferred to the substrate 71. The substrate 71 has a surface 711 facing the -X direction, which has a placement recess 712 in which the vapor chamber 72 is positioned. The placement recess 712 is a recess that is recessed in the +Z direction from the surface 711 according to the shape of the vapor chamber 72 when viewed from the -X direction, and the vapor chamber 72 is mounted in the placement recess 712 from the -X direction. In other words, the light source device 4 has a vapor chamber 72 provided on the substrate 71. Furthermore, two roughly rectangular through-holes 7121 are provided at the bottom of the placement recess 712. Each of the two through-holes 7121 penetrates the substrate 71 along the +X direction. A connecting portion 722 of the vapor chamber 72, which is located in the placement recess 712, is inserted through each of the two through-holes 7121, thereby allowing the connecting portion 722 to come into contact with the light source 41.

[0043] The substrate 71 has a flow port 713 that penetrates the substrate 71 along the +X direction, and a connecting portion 715. The airflow opening 713 is an opening that allows a portion of the airflow circulating through the heat dissipation member 7 to flow through the heat transfer member 65. The airflow opening 713 is located away from the center of the substrate 71. More specifically, the airflow opening 713 is located in the +Y direction relative to the arrangement recess 712. In other words, the airflow opening 713 is located near the +Y edge of the substrate 71. As will be described in more detail later, the airflow opening 713 is located at a position corresponding to the periphery of the fan 8 that circulates airflow through the heat dissipation member 7 along the +X direction. In other words, the airflow opening 713 is located at a position through which the peripheral airflow from the fan 8 circulates through the heat dissipation member 7. Such a flow port 713 is composed of a plurality of openings 714 provided in the substrate 71 at a distance from each other. Specifically, the plurality of openings 714 are provided in the +Z direction near the +Y direction edge of the substrate 71. In this embodiment, two openings 714 are provided, but the number of openings 714 constituting the flow port 713 can be changed as appropriate.

[0044] The connecting portion 715 is provided between a plurality of openings 714 and connects the inner edges of each opening 714. In this embodiment, the connecting portion 715 is the part that connects the inner edge in the -Z direction of an opening 714 in the +Z direction and the inner edge in the +Z direction of an opening 714 in the -Z direction, where the plurality of openings 714 are aligned. On the surface of the connection portion 715 facing the +X direction, the wiring WR extending from the light source 41 is arranged.

[0045] [Vapor Chamber Configuration] The vapor chamber 72 is positioned in the placement recess 712 of the substrate 71 to constitute the substrate 71 and diffuses the heat received from the light source 41. The vapor chamber 72 has a heat receiving section 721 and a connecting section 722 as shown in Figure 8, as well as a heat dissipation section 723 as shown in Figure 7. The heat receiving section 721 shown in Figure 10 is the part of the vapor chamber 72 that faces the +X direction and is opposite the light source 41. The connecting portion 722 is a metal member such as copper provided on the heat receiving portion 721. The connecting portion 722 is connected to the light source 41 in a heat transfer manner when the vapor chamber 72 is placed in the arrangement recess 712. As a result, some of the heat generated by the light source 41 is transferred to the heat receiving portion 721 via the connecting 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 into a gaseous phase medium.

[0046] The heat dissipation section 723 shown in Figure 9 dissipates the heat from the gaseous medium transformed in the heat receiving section 721 to the outside of the vapor chamber 72, condensing the gaseous medium into a liquid medium. The condensed liquid medium moves through the sealed space within the vapor chamber 72 toward the inner surface of the heat receiving section 721 by capillary force. Furthermore, the heat receiving section 731 of the heat pipe 73 is connected to the heat dissipation section 723, and the heat released from the heat dissipation section 723 is transferred to the heat receiving section 731.

[0047] [Heat pipe configuration] As shown in Figures 9 and 10, the heat pipe 73 is a heat transport member that is connected to the vapor chamber 72 and the heat sink 74 in a heat transfer manner, and transports the heat released from the vapor chamber 72 to the heat sink 74. The heat pipe 73 has a heat receiving section 731 as shown in Figure 10, as well as a heat dissipation section 732 as shown in Figures 9 and 10. The heat receiving section 731 is connected to the heat dissipation section 723, and the heat dissipation section 732 is connected to the heat sink 74. As a result, the heat pipe 73 transports the heat released from the heat dissipation section 723 of the vapor chamber 72 to the heat sink 74. The heat dissipation member 7 has a plurality of heat pipes 73, and in this embodiment, the heat dissipation member 7 has five heat pipes 73 arranged in the +Z direction. Each heat pipe 73 is bent into a roughly U-shape. Of the five heat pipes 73, the three odd-numbered heat pipes 73 extending from the heat receiving section 731 in the +Y direction are bent into a roughly U-shape, and their heat dissipation sections 732 are connected to the heat sink 74. Of the five heat pipes 73, the two even-numbered heat pipes 73 extending from the heat receiving section 731 in the -Y direction are bent into a roughly U-shape, and their heat dissipation sections 732 are connected to the heat sink 74.

[0048] [Heat sink configuration] The heat sink 74 releases the heat transported by the heat pipe 73. Specifically, the heat sink 74 releases the transported heat into the airflow sent out from the fan 8, which will be described later. As shown in Figures 9 and 10, the heat sink 74 has a plurality of plate-shaped fins 75 arranged along the XZ plane, and the plurality of fins 75 are arranged in the +Y direction and fixed to each other. That is, the heat dissipation member 7 has a plurality of fins 75. Each fin 75 has multiple ribs 751 that protrude in the -Y direction, as shown in Figure 9. Each rib 751 increases the surface area of ​​the fin 75, thereby improving the heat dissipation of each fin 75. In addition, since each rib 751 extends along the heat pipes 73 between them, it facilitates the flow of air sent from the fan 8 through the heat pipes 73.

[0049] [Configuration of air guide members] As shown in Figures 9 and 10, the air guide member 76 is configured in a roughly U-shape that opens in the -Z direction when viewed from the ±X direction, and is positioned 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 has been sent from the fan 8 (described later) toward the heat sink 74 and cooled the heat sink 74 toward the -Z direction. Since the exhaust port 261 is located in the -Z direction relative to the heat sink 74, the airflow guided toward the -Z direction by the air guide member 76 is discharged to the outside of the outer casing 2 through the exhaust port 261.

[0050] [Duct configuration] As shown in Figures 7 and 8, the duct 64 is attached to the housing 61 so as to cover a portion of the second surface 612 and the third surface 613 of the housing 61. The duct 64 allows the airflow that has passed through the flow opening 713 of the substrate 71 to flow along the second surface 612, and then along the third surface 613. The duct 64 has a first duct section 641 and a second duct section 642.

[0051] The first duct portion 641 extends in the +X direction and covers the portion formed by the cover member 63 on the second surface 612 in the +Y direction. The cross section of the first duct portion 641 along the YZ plane defined by the +Y and +Z directions is formed in a U shape that opens in the -Y direction. The periphery of the first duct portion 641 in the +X and +Z directions 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. The first duct section 641 contains a first duct 64A inside which airflow can flow along the second surface 612. Airflow that has passed through the flow opening 713 flows through the first duct 64A and flows in the +X direction along the second surface 612.

[0052] The second duct section 642 extends in the -Y direction from the -Z end of the first duct section 641 and covers the portion of the third surface 613 that is made up of the heat transfer member 65 in the -Z direction. The cross section of the second duct section 642 along the XZ plane defined by the +X and +Z directions is formed in a U shape that opens in the +Z direction. The periphery of the second duct section 642 in the +X and -X directions is connected to the surface of the heat transfer member 65 that faces the -Z direction. The second duct section 642 contains a second duct 64B inside which airflow can flow along the heat transfer member 65. Airflow that has passed through the first duct 64A flows in the -Y direction along the heat transfer member 65 within the second duct 64B. Furthermore, the -Y end of the second duct section 642 is not connected to the heat transfer member 65. As a result, as will be described in more detail later, the light source housing 6 is configured with an outlet 66 that discharges the airflow that has flowed through the second duct 64B to the outside of the light source housing 6.

[0053] [Configuration of heat transfer components] As shown in Figures 7 and 8, the heat transfer member 65 is a plate-shaped member fixed to the housing 61 and forming part of the third surface 613 of the housing 61. In other words, the heat transfer member 65 forms part of the outer surface of the housing 61. The heat transfer member 65 receives heat from the drive unit 505 of the wavelength conversion device 50 described above, as well as from the gas in the housing space SP. The heat transfer member 65 also dissipates the heat it receives to the outside of the housing 61. As shown in Figure 7, the heat transfer member 65 has a first surface 651, a connecting portion 652, and a heat receiving pillar 653, and as shown in Figure 8, it also has a second surface 654, a protruding portion 655, a heat dissipating pillar 656, and a flow straightening portion 657.

[0054] As shown in Figure 7, the first surface 651 is the surface of the heat transfer member 65 that faces the +Z direction. That is, the first surface 651 is the surface that faces the wavelength conversion device 50 and is attached to the lower housing 62. The first surface 651 is a heat receiving surface that is in contact with the containment space SP and receives heat from the gas in the containment space SP. The connecting portion 652 is located approximately in the center of the first surface 651. The -Z end of the drive unit 505 is connected to the connecting portion 652. As a result, the heat generated in the drive unit 505 is received by the heat transfer member 65. The heat receiving pillars 653 are columnar parts erected in multiple locations on the first surface 651 in the region facing the second surface 5022 of the phosphor wheel 501. Each of the multiple heat receiving pillars 653 is arranged at approximately equal intervals along each of the multiple concentric circles centered on the rotation axis Rx. The multiple heat receiving pillars 653 are exposed within the housing space SP of the housing casing 61 when the heat transfer member 65 is fixed to the housing casing 61. Each of the multiple heat receiving pillars 653 receives heat from the gas in the housing space SP.

[0055] As shown in Figure 8, the second surface 654 is the surface of the heat transfer member 65 facing the -Z direction. The portion of the second surface 654 in the +Y direction is covered in the -Z direction by the second duct portion 642 of the duct 64. The protruding portion 655 is a portion that protrudes in the -Z direction in accordance with the connecting portion 652 on the second surface 654. The heat dissipation pillars 656 are columnar parts erected around the protrusion 655 on the second surface 654. Each of the heat dissipation pillars 656 is arranged at approximately equal intervals along each of the multiple concentric circles centered on the rotation axis Rx. Each of the heat dissipation pillars 656 dissipates the heat from the drive unit 505 transmitted to the connection unit 652, and the heat from the gas in the containment space SP that has been heated by the multiple heat receiving pillars 653. The heat dissipation pillars 656 may also be provided at positions corresponding to the heat receiving pillars 653 on the second surface 654.

[0056] The rectifier section 657 is an upright wall that rises in the -Z direction from the -Y direction portion on the second surface 654. The central portion of the rectifier section 657 in the +X direction is located in the -Y direction more than the ends in the +X direction and the ends in the -X direction. The +X direction end of the rectifier section 657 is connected to the +X and -Y direction ends of the second duct section 642 of the duct 64, and the -X direction end of the rectifier section 657 is connected to the -X and -Y direction ends of the second duct section 642. Thus, the rectifier section 657, when combined with the duct 64, forms the outlet 66 shown in Figures 5 and 9. Furthermore, the surface 6571 facing the -Z direction in the rectifier section 657 is an inclined surface that protrudes in the -Z direction as it moves toward the -Y direction. Therefore, the configuration of the heat transfer member 65 is such that airflow can be easily discharged from the outlet 66 along the rectifier section 657.

[0057] [Fan composition] Figure 11 is a perspective view showing the arrangement of the light source device 4 and the fan 8 inside the outer casing 2. In addition to the above configuration, projector 1 is equipped with a fan 8 that circulates airflow to the light source device 4, as shown in Figure 11. Fan 8 is positioned inside the outer casing 2, corresponding to the first inlet 213 on the front section 21. In other words, fan 8 is positioned between the first inlet 213 and the light source device 4, in the -X direction relative to the light source device 4. Fan 8 blows the air from outside the outer casing 2, introduced through the first inlet 213, in the +X direction, generating an airflow that circulates to the heat dissipation member 7.

[0058] Figure 12 is a side view of the light source device 4 and fan 8 as seen from the -X direction. Note that the heat sink 74, which constitutes the heat dissipation member 7, is not shown in Figure 12. In this embodiment, the fan 8 is an axial flow fan having a fan case 81 that is substantially rectangular in shape. As shown in Figure 12, the fan 8 has a blade member 82 that rotates around a rotation axis Rx1 along the +X direction, and a motor 83 that rotates the blade member 82, and the blade member 82 and the motor 83 are arranged inside the fan case 81. The fan case 81 has an opening 811 through which airflow passes. When viewed from the ±X direction, the inner edge of the opening 811 is formed in a circular shape that follows the rotational trajectory of the outer edge of the blade member 82.

[0059] [The relationship between fans and distribution channels] Figure 13 shows the positional relationship between the flow port 713 of the substrate 71 and the fan 8 as viewed from the +X direction. Note that the heat pipe 73 and heat sink 74 are not shown in Figure 13. When the light source device 4 and the fan 8 are arranged inside the outer casing 2, the flow port 713 of the substrate 71 constituting the heat dissipation member 7 of 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 when viewed from the ±X direction, as shown in Figures 12 and 13. That is, the flow port 713 overlaps with the fan 8 when viewed from the fan 8 side of the heat dissipation member 7, and is located closer to the periphery of the fan 8 than to the center of the fan 8. In this embodiment, the flow port 713 overlaps with the periphery of the opening 811 of the fan 8 when viewed from the ±X direction, and also overlaps with the trajectory of the outer circumference of the blade member 82 when it rotates. Therefore, when the fan 8 is running, a portion of the peripheral airflow generated by the fan 8 flows into the airflow port 713. On the other hand, when viewed from the -X direction, the vapor chamber 72 coincides with the rotation axis of the blade member 82. Most of the airflow generated by the fan 8 flows to each fin 75 of the heatsink 74, which is connected to the vapor chamber 72 via the heat pipe 73.

[0060] Figure 14 shows the positional relationship between the flow port 713 of the substrate 71, the heat pipe 73, and the fins 75 as viewed from the +X direction. As shown in Figure 14, when the substrate 71 is viewed from the +X direction, each opening 714 of the flow port 713 overlaps not only with some of the fins 75 that make up the heat sink 74, but also with a part of the heat pipe 73. The same is true when the heat dissipation member 7 is viewed from the -X direction, which is the fan 8 side. Therefore, the airflow sent from the fan 8 and passing through the circulation port 713 is the airflow that has flowed not only along the fins 75 but also along the heat pipe 73. However, this is not limited to this example; the flow port 713 and the fin 75 do not necessarily have to overlap when viewed from the ±X direction, nor do the flow port 713 and the heat pipe 73 have to overlap.

[0061] [Airflow generated by a fan] Figure 15 is a diagram showing a cross-section of the light source device 4 and fan 8 along the XZ plane in the first duct section 641. In other words, Figure 15 is a diagram showing the airflow discharged from the fan 8. When the fan 8 is driven, air from outside the outer casing 2 is drawn in through the first inlet 213 on the front section 21, and as shown by arrow A1 in Figure 15, airflow is sent from the fan 8 to the heat dissipation member 7. The airflow sent from the fan 8 to the heat dissipation member 7 flows through the vapor chamber 72 and heat pipe 73 to the multiple fins 75 that make up the heat sink 74, to which heat is transferred from the light source 41.

[0062] Of the airflow that flows through the multiple fins 75, the airflow that flows toward the flow port 713 when viewed from the -X direction passes through a portion of the multiple fins 75 in the +X direction, as shown by arrow A2, and then passes through each opening 714 of the flow port 713 in the +X direction. Of the airflow that flows through the multiple fins 75, the airflow that flows toward a portion of the substrate 71 different from the flow port 713 when viewed from the -X direction flows between the multiple fins 75 in the +X direction, as shown by arrow A3, and cools the multiple fins 75. The airflow that has cooled the multiple fins 75 in this way is guided in the -Z direction by the air guide member 76, as shown by arrow A4, and discharged to the outside of the outer casing 2 through the discharge port 261.

[0063] The airflow that passes through each opening 714 in the +X direction flows through the first duct 64A in the +X direction. At this time, the airflow flows along the lid member 63 that constitutes the first duct 64A. This cools the lid member 63, which receives heat from the gas in the containment space SP, thereby lowering the temperature inside the containment space SP. The airflow that has cooled the lid member 63 then flows toward the second duct 64B, as shown by arrow A5.

[0064] Figure 16 shows a cross-section of the light source device 4 along the YZ plane in the second duct section 642. In other words, Figure 16 shows the airflow discharged from the fan 8. In Figure 16, the airflow indicated by arrow A5 that flows into the second duct 64B circulates in the -Y direction through the second duct 64B, as indicated by arrow A6. At this time, the airflow circulates along the second surface 654 and the heat dissipation pillar 656 of the heat transfer member 65, cooling the heat transfer member 65. Since the heat from the drive unit 505 of the wavelength conversion device 50 and the heat from the gas in the containment space SP are transferred to the heat transfer member 65, the heat transfer member 65 is cooled, and the temperatures of the wavelength conversion device 50 and the containment space SP are lowered. The airflow that has flowed along the heat transfer member 65 is discharged to the outside of the light source device 4 through the outlet 66, as shown by arrow A7. At this time, the airflow that has flowed through the second duct 64B is made easier to discharge from the outlet 66 by flowing along the surface 6571 of the rectifier 657. Furthermore, since the exhaust port 66 faces the exhaust port 263 provided on the left side portion 26 of the outer casing 2, the airflow discharged from the exhaust port 66 is discharged to the outside of the outer casing 2 through the exhaust port 263.

[0065] [Effects of the Embodiment] The projector 1 according to this embodiment, as described above, provides the following effects. The projector 1 comprises a light source device 4, a light modulator 343 that modulates the light emitted from the light source device 4, a projection optical device 36 that projects the light modulated by the light modulator 343, and a fan 8 that circulates airflow to the heat dissipation member 7 of the light source device 4.

[0066] The light source device 4 comprises a light source 41 that emits light, a heat dissipation member 7 that dissipates heat from the light source 41, a wavelength conversion device 50 that converts the wavelength of light emitted from the light source 41, a housing 61 having a housing space SP that houses the light source 41 and the wavelength conversion device 50, and a heat transfer member 65 provided in the housing 61, forming a part of the outer surface of the housing 61, and thermally connected to the wavelength conversion device 50. The heat dissipation member 7 has 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 port 713 that penetrates the substrate 71 and allows a part of the airflow flowing to the heat dissipation member 7 to flow to the heat transfer member 65.

[0067] With this configuration, of the airflow circulating through the heat dissipation member 7, some of the airflow passes through the flow port 713 of the substrate 71 and flows to the heat transfer member 65, while the other airflow cools the heat dissipation member 7. As a result, the airflow circulating from the fan 8 to the heat dissipation member 7 can cool the heat dissipation member 7 connected to the light source 41 and the heat transfer member 65 connected to the wavelength conversion device 50, and consequently, 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 a fan is provided for each of the light source 41 and the wavelength conversion device 50, thus enabling miniaturization of the light source device 4. Furthermore, since the airflow that has passed through the flow port 713 flows through the heat transfer member 65, the temperature of the airflow flowing through the heat transfer member 65 can be lowered compared to the case where the airflow that has cooled the entire heat dissipation member 7 flows through the heat transfer member 65. In other words, a relatively low-temperature airflow can be circulated through the heat transfer member 65. Therefore, the light source device 4 can be miniaturized while ensuring the cooling efficiency of the light source 41 and the wavelength conversion device 50.

[0068] In the light source device 4, the heat transfer member 65 has a plurality of heat dissipation pillars 656 provided on the second surface 654 of the heat transfer member 65. The second surface 654 corresponds to the outer surface, and the heat dissipation pillars 656 correspond to pillars. With this configuration, the contact area between the airflow circulating through the heat transfer member 65 and the heat transfer member 65 can be increased, making it easier to transfer the heat from the wavelength converter 50 that has been transferred to the heat transfer member 65 to the airflow circulating through the heat transfer member 65. Therefore, the cooling efficiency of the wavelength converter 50 can be increased.

[0069] In the light source device 4, the wavelength conversion device 50 includes a drive unit 505 which is a motor, a rotating plate 502 which is rotated by the drive unit 505, and a phosphor layer 503 provided on the rotating plate 502 which converts the wavelength of incident light. The heat transfer member 65 is connected to the drive unit 505 in a way that allows for heat transfer. With this configuration, the heat transfer member 65 transfers at least the heat transmitted from the drive unit 505 to the airflow circulating through the heat transfer member 65, thereby increasing the cooling efficiency of the drive unit 505, and consequently increasing the cooling efficiency of the wavelength conversion device 50.

[0070] In the light source device 4, the housing 61 has a first surface 611 which is at least partially formed by a substrate 71, a second surface 612 which intersects with the first surface 611, and a third surface 613 which intersects with both the first surface 611 and the second surface 612. At least a portion of the third surface 613 is formed by a 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. The airflow that passes through the flow inlet 713 flows along the second surface 612, and then flows along the heat transfer member 65. With this configuration, the airflow that passes through the flow port 713 flows along the second surface 612 and then flows along the heat transfer member 65. Compared to the case where the airflow that passes through the flow port 713 flows directly to the heat transfer member 65, this makes it easier to circulate the airflow along the heat transfer member 65 and also makes it easier to discharge the airflow that has circulated along the heat transfer member 65. Therefore, the cooling efficiency of the heat transfer member 65, and consequently the cooling efficiency of the wavelength conversion device 50, can be increased.

[0071] In the light source device 4, the heat transfer member 65 is located on the opposite side of the second surface 654 which constitutes the third surface 613, and has a first surface 651 that receives heat from the airflow in the containment space SP. The first surface 651 is the heat receiving surface. With this configuration, the heat received in the housing space SP by the first surface 651 is dissipated to the outside of the housing casing 61 by the second surface 654 of the heat transfer member 65, thereby lowering the temperature inside the housing space SP and, consequently, improving the cooling efficiency of the light source 41 and wavelength conversion device 50 inside the housing casing 61.

[0072] In the light source device 4, at least a portion of the second surface 612 is made up of a cover member 63. The cover member 63 is a metal member that receives heat from the gas in the containment space SP. With this configuration, the airflow passing through the flow port 713 cools the lid member 63, which has received heat from the gas in the containment space SP, before flowing to the heat transfer member 65. This allows the temperature inside the containment space SP to be lowered, so that the light source 41 and the wavelength conversion device 50 can be cooled inside the containment housing 61. Therefore, the cooling efficiency of the light source 41 and the wavelength conversion device 50 can be increased.

[0073] The light source device 4 includes a duct 64 that guides the airflow that has passed through the flow port 713 to the heat transfer member 65. With this configuration, the airflow that has passed through the flow port 713 can be easily circulated to the heat transfer member 65. Therefore, compared to the case where the airflow that has passed through the flow port 713 diffuses as it flows to the heat transfer member 65, the cooling efficiency of the heat transfer member 65, and consequently the cooling efficiency of the wavelength conversion device 50, can be increased. Furthermore, in the light source device 4, the duct 64 makes it easier to circulate airflow through the cover member 63, thus improving the cooling efficiency of the light source 41 and the wavelength conversion device 50 as described above.

[0074] The light source device 4 has an outlet 66 formed by the duct 64 and the heat transfer member 65. The outlet 66 is located in the downstream portion of the airflow direction of the airflow passing through the heat transfer member 65, that is, in the portion of the heat transfer member 65 in the -Y direction, and discharges the airflow that has passed through the heat transfer member 65. With this configuration, the airflow that has passed through the heat transfer member 65 can be quickly discharged. Therefore, compared to the case where the airflow that has passed through the heat transfer member 65 remains stagnant, the cooling efficiency of the heat transfer member 65, and consequently the cooling efficiency of the wavelength conversion device 50, can be increased.

[0075] In the light source device 4, the flow port 713 is composed of a plurality of openings 714 provided in the substrate 71 at a distance from each other. The substrate 71 has connecting portions 715 provided between the plurality of openings 714, connecting the inner edges of each of the plurality of openings 714. With this configuration, the substrate 71 can be reinforced by the connection portion 715. Furthermore, wiring extending from the light source 41 can be placed at the connection portion 715.

[0076] In the light source device 4, when viewed along the direction of airflow to the heat dissipation member 7, the airflow port 713 and at least one of the multiple fins 75 overlap with each other. That is, as shown in Figure 14, when viewed from the +X direction, the airflow port 713 and at least one of the multiple fins 75 overlap with each other, and the same is true when viewed along the +X direction, which is the direction of airflow. With this configuration, the airflow cooled by at least one fin 75 can be circulated to the heat transfer member 65. This suppresses a decrease in the cooling efficiency of the light source 41 compared to the case where some of the airflow circulating to the heat dissipation member 7 passes through the flow port 713 without going through the fin 75. Generally, the upper limit of the allowable temperature range of the wavelength converter 50 is higher than the upper limit of the allowable temperature range of the light source 41. Therefore, even if the airflow that has passed through at least one fin 75 flows to the heat transfer member 65 and cools the wavelength converter 50, it is easier to keep the temperatures of both the light source 41 and the wavelength converter 50 within their respective allowable temperature ranges.

[0077] In the light source device 4, the heat dissipation member 7 is provided on the substrate 71 and has a vapor chamber 72 that receives heat from the light source 41. Multiple fins 75 dissipate the heat transferred from the vapor chamber 72. With this configuration, the vapor chamber 72 has high thermal diffusion performance, so that the heat from the light source 41 can be quickly transferred from the substrate 71 to each of the multiple fins 75.

[0078] In the light source device 4, the heat dissipation member 7 has a heat pipe 73 for transporting heat. The heat pipe 73 has a heat receiving section 731 connected to the vapor chamber 72, and a heat dissipation section 732 connected to at least one fin 75 of a plurality of fins 75, which dissipates the heat received by the heat receiving section 731 to the fin 75. With this configuration, heat can be more easily transferred by the heat pipe 73 to the fins 75 that are less likely to receive heat from the vapor chamber 72. This allows for efficient heat transfer to the multiple fins 75, and consequently, makes it easier to transfer heat from the multiple fins 75 to the airflow circulating through the heat dissipation member 7. Therefore, the cooling efficiency of the light source 41 can be increased.

[0079] In projector 1, fan 8 is an axial fan. The airflow port 713 overlaps with fan 8 when viewed from the fan 8 side of the heat dissipation member 7, and is located closer to the periphery of fan 8 than to the center of fan 8. Generally, the flow rate distribution of airflow delivered by an axial fan is such that the flow rate is higher closer to the center of the fan and decreases towards the periphery. Therefore, by directing the airflow delivered from a position close to the center of the axial fan to multiple fins 75, the cooling efficiency of the light source 41 can be ensured, while the cooling efficiency of the wavelength converter 50 can be ensured by directing the airflow on the periphery side of the fan 8 through the flow port 713 to the heat transfer member 65.

[0080] [Variations of the Embodiment] This disclosure is not limited to the embodiments described above, and any modifications and improvements that can achieve the objectives of this disclosure are included. In the above embodiment, the airflow that flows through the flow port 713 of the substrate 71 flows along the lid member 63, which is a metal member constituting the second surface 612, and then flows along the heat transfer member 65 constituting the third surface 613. However, the embodiment is not limited to this, and the airflow that flows through the flow port 713 may flow directly to the heat transfer member 65. In this case, for example, a flow port may be provided along the -Z edge of the substrate 71, and the airflow that passes through the flow port may flow along the heat transfer member 65.

[0081] In the above embodiment, the second surface 654, which is the outer surface of the heat transfer member 65, is provided with a plurality of heat dissipation pillars 656. However, the heat transfer member 65 is not limited to this, and does not need to have heat dissipation pillars 656, nor does it need to have heat receiving pillars 653. In addition, the heat transfer member 65 may have at least one fin instead of, or in addition to, the heat dissipation pillars 656. Furthermore, the first surface 651 of the heat transfer member 65 that comes into contact with the gas in the containment space SP does not need to be a heat receiving surface.

[0082] In the above embodiment, the heat transfer member 65 is connected to the drive unit 505 that constitutes the wavelength conversion device 50. However, this is not limited to this, and for example, if the wavelength conversion device 50 does not have a drive unit 505 and the phosphor layer 503 is not rotated, the heat transfer member 65 may be connected to the phosphor layer 503 or to the substrate supporting the phosphor layer 503.

[0083] In the above embodiment, the lid member 63, which together with the lower housing 62 constitutes the housing housing 61 and comes into contact with the gas in the housing space SP, is made of metal. However, it is not limited to this, and the lid member 63 may be made of a material other than metal, such as resin. If the lid member 63 is made of metal, the heat dissipation efficiency of the heat transferred from the gas in the housing space SP can be improved.

[0084] In the above embodiment, a duct 64 is provided to circulate the airflow that has passed through the flow port 713 to the lid member 63 and the heat transfer member 65. However, the light source device 4 is not limited to this, and does not need to have a duct 64. Furthermore, the light source device 4 does not need to have a duct to circulate the airflow that has passed through the flow port 713 to the lid member 63 and the heat transfer member 65. In other words, the airflow that has passed through the flow port 713 may be circulated to the lid member 63 and the heat transfer member 65 using a configuration other than the light source device 4, for example, the inner surface of the outer casing 2 or a member attached to the outer casing 2.

[0085] In the above embodiment, the airflow that has passed through the heat transfer member 65 is discharged to the outside of the light source device 4 via an outlet 66 formed by combining the duct 64 and the heat transfer member 65. However, the invention is not limited to this, and the outlet 66 may be formed by the duct 64 alone, or by the heat transfer member 65 alone.

[0086] In the above embodiment, the flow port 713 is composed of a plurality of openings 714 provided in the substrate 71 at a distance from each other, and the substrate 71 has connecting portions 715 that connect the inner edges of the plurality of openings 714. However, the embodiment is not limited to this, and the flow port 713 may be a single opening. Furthermore, the flow port 713 is not limited to two openings 714, but may be composed of three or more openings 714.

[0087] In the above embodiment, the heat dissipation member 7 has a vapor chamber 72 provided on the substrate 71, and the plurality of fins 75 dissipate the heat transferred from the vapor chamber 72. However, the heat dissipation member 7 is not limited to this, and does not have to have a vapor chamber 72. For example, heat from the light source 41 may be transferred to the plurality of fins 75 via the substrate 71. Alternatively, for example, a heat pipe 73 may transfer heat received from the substrate 71 to the plurality of fins 75.

[0088] In the above embodiment, the heat dissipation member 7 is provided with a heat pipe 73 connecting the vapor chamber 72 and the plurality of fins 75. However, the heat pipe 73 is not limited to this and may be omitted. In this case, the heat dissipation section 723 of the vapor chamber 72 may be connected to the plurality of fins 75.

[0089] In the above embodiment, the fan 8 is an axial flow fan, and the airflow port 713 is positioned so as viewed from the fan 8 side towards the heat dissipation member 7, overlapping with the fan 8 and located closer to the periphery of the fan 8 than to its center. However, the embodiment is not limited to this, and the fan 8 may be a centrifugal fan such as a sirocco fan. Furthermore, the positional relationship between the airflow port 713 and the fan 8 is not limited to the above; for example, the airflow port 713 may be positioned closer to the center of the airflow delivery range from the fan 8.

[0090] In the above embodiment, the projector 1 is provided with three optical modulators 343R, 343G, and 343B. However, the present disclosure is not limited to this and can also be applied to projectors equipped with two or fewer optical modulators 343, or four or more optical modulators 343.

[0091] In the above embodiment, the optical modulator 343 was assumed to be composed of a transmissive liquid crystal panel with different light incident and light output surfaces. However, the optical modulator 343 is not limited to this, and may be composed of a reflective liquid crystal panel with the same light incident and light output surface. Furthermore, any optical modulator capable of modulating the incident light beam to form an image corresponding to image information may be used in the projector 1, such as a device using micromirrors, for example, a DMD (Digital Micromirror Device), or other optical modulators other than liquid crystals.

[0092] In the above embodiment, an example was given in which the light source device 4 was applied to the projector 1. However, the light source device 4 is not limited to this, and may be used as a standalone device or applied to an illumination device. In other words, the light source device of this disclosure may be used in electronic devices other than the projector 1.

[0093] [Summary of this disclosure] A summary of this disclosure is provided below. [Note 1] A light source that emits light, A heat dissipation member that dissipates heat from the aforementioned light source, A wavelength conversion device that converts the wavelength of light emitted from the light source, A housing having a housing space for housing the light source and the wavelength conversion device, A heat transfer member provided in the housing and constituting a part of the outer surface of the housing, which is thermally connected to the wavelength conversion device, Equipped with, The heat dissipation member is A substrate to which the heat of the light source is transferred, The substrate has a plurality of fins arranged on it, The substrate has a flow port that penetrates the substrate and allows a portion of the airflow flowing to the heat dissipation member to flow to the heat transfer member. A light source device characterized by the following features.

[0094] In this configuration, of the airflow circulating through the heat dissipation component, some of the airflow passes through the flow ports of the substrate and flows to the heat transfer component, while the other airflow cools the heat dissipation component. As a result, for example, the airflow circulating from a single fan to the heat dissipation component can cool both the heat dissipation component connected to the light source and the heat transfer component connected to the wavelength converter, and consequently, both the light source and the wavelength converter can be cooled. Therefore, the number of fans can be reduced compared to the case where a separate fan is provided for the light source and the wavelength converter, thus enabling miniaturization of the light source device. Furthermore, since the airflow that has passed through the flow port flows through the heat transfer member, the temperature of the airflow flowing through the heat transfer member can be lowered compared to when the airflow that has cooled the entire heat dissipation member flows through the heat transfer member. In other words, a relatively low-temperature airflow can be circulated through the heat transfer member. Therefore, the light source device can be miniaturized while ensuring the cooling efficiency of the light source and wavelength conversion device.

[0095] [Note 2] In the light source device described in Appendix 1, The heat transfer member has a plurality of pillars provided on the outer surface of the heat transfer member. A light source device characterized by the following features. With this configuration, the contact area between the airflow circulating through the heat transfer element and the heat transfer element can be increased, making it easier to transfer the heat from the wavelength converter that has been transferred to the heat transfer element to the airflow circulating through the heat transfer element. Therefore, the cooling efficiency of the wavelength converter can be improved.

[0096] [Note 3] In the light source device described in Appendix 1 or Appendix 2, The wavelength conversion device is Motor and, A rotating plate rotated by the aforementioned motor, The rotating plate is provided with a phosphor layer that converts the wavelength of incident light, The heat transfer member is connected to the motor in a way that allows for heat transfer. A light source device characterized by the following features. With this configuration, the heat transfer member transfers at least the heat transmitted from the motor to the airflow circulating through the heat transfer member, thereby increasing the cooling efficiency of the motor and, consequently, the cooling efficiency of the wavelength conversion device.

[0097] [Note 4] In a light source device described in any one of the appendices 1 to 3, The aforementioned consultation housing is The first outer surface, at least a portion of which is formed by the substrate, A second outer surface intersecting the first outer surface, It includes a third outer surface that intersects with the first outer surface and the second outer surface, and is at least partially formed by the heat transfer member, The airflow that has passed through the aforementioned flow port flows along the second outer surface and then flows along the heat transfer member. A light source device characterized by the following features. With this configuration, the airflow that passes through the flow port flows along the second outer surface and then along the heat transfer member. Compared to the case where the airflow that passes through the flow port flows directly along the heat transfer member, this makes it easier to circulate the airflow along the heat transfer member and also makes it easier to discharge the airflow that has circulated along the heat transfer member. Therefore, the cooling efficiency of the heat transfer member, and consequently the cooling efficiency of the wavelength conversion device, can be improved.

[0098] [Note 5] In the light source device described in Appendix 4, The heat transfer member is located on the opposite side of the surface constituting the third outer surface and has a heat receiving surface that receives heat from the gas in the containment space. A light source device characterized by the following features. With this configuration, the heat absorbed by the heat receiving surface within the housing space is dissipated to the outside of the housing by the outer surface of the heat transfer member, thereby lowering the temperature within the housing space and, consequently, improving the cooling efficiency of the light source and wavelength conversion device within the housing.

[0099] [Note 6] In the light source device described in Appendix 4 or Appendix 5, At least a portion of the second outer surface is made of a metal member that receives heat from the gas in the containment space. A light source device characterized by the following features. With this configuration, the airflow passing through the flow port cools the metal components that have absorbed heat from the gas in the containment space before flowing to the heat transfer components. This allows the temperature inside the containment space to be lowered, enabling the light source and wavelength conversion device to be cooled inside the containment housing. Consequently, the cooling efficiency of the light source and wavelength conversion device can be improved.

[0100] [Note 7] In a light source device described in any one of the appendices 1 to 6, The system includes a duct that guides the airflow that has passed through the aforementioned flow port to the heat transfer member. A light source device characterized by the following features. This configuration makes it easier to circulate the airflow that has passed through the flow port to the heat transfer element. Therefore, compared to the case where the airflow that has passed through the flow port diffuses as it circulates to the heat transfer element, the cooling efficiency of the heat transfer element, and consequently the cooling efficiency of the wavelength conversion device, can be improved. Furthermore, in a configuration where airflow passing through the flow port flows along the second outer surface before flowing to the heat transfer member, if at least a portion of the second outer surface is made of the metal member, the duct can be used to facilitate airflow to the metal member. Therefore, the cooling efficiency of the light source and wavelength conversion device can be improved.

[0101] [Note 8] In the light source device described in Appendix 7, A duct and a heat transfer member are formed by at least one of them, and the heat transfer member is provided on the downstream side in the direction of airflow flowing through it, and has an outlet for discharging the airflow that has flowed through it. A light source device characterized by the following features. With this configuration, the airflow that has passed through the heat transfer element can be quickly discharged. Therefore, compared to the case where the airflow that has passed through the heat transfer element remains stagnant, the cooling efficiency of the heat transfer element, and consequently the cooling efficiency of the wavelength conversion device, can be improved.

[0102] [Note 9] In a light source device described in any one of the appendices 1 to 8, The aforementioned flow port is composed of a plurality of openings provided in the substrate at intervals from each other. The substrate is provided between the plurality of openings and has connecting portions that connect the inner edges of each of the plurality of openings. A light source device characterized by the following features. With this configuration, the substrate can be reinforced by the connecting parts provided between the multiple openings that constitute the flow port. Furthermore, wiring extending from the light source can be placed at the connecting parts.

[0103] [Note 10] In a light source device described in any one of the appendices 1 to 9, Viewed along the direction of airflow to the heat dissipation member, the airflow port and at least one of the plurality of fins overlap each other. A light source device characterized by the following features. With this configuration, when viewed along the direction of airflow to the heat dissipation member, at least one of the multiple fins to which heat from the light source is transferred overlaps with the flow port, allowing the airflow that has cooled that at least one fin to flow to the heat transfer member. This suppresses a decrease in the cooling efficiency of the light source compared to when some of the airflow flowing to the heat dissipation member passes through the flow port without going through the fin. Generally, the upper limit of the allowable temperature range for a wavelength converter is higher than the upper limit of the allowable temperature range for a light source. Therefore, even if the airflow passing through at least one of the fins flows through the heat transfer element and cools the wavelength converter, it is easier to keep the temperatures of both the light source and the wavelength converter within their respective allowable temperature ranges.

[0104] [Note 11] In a light source device described in any one of the appendices 1 to 10, The heat dissipation member is provided on the substrate and has a vapor chamber that receives heat from the light source. The plurality of fins dissipate heat transferred from the vapor chamber. A light source device characterized by the following features. With this configuration, the vapor chamber has high thermal diffusion performance, allowing heat from the light source to be quickly transferred from the substrate to each of the multiple fins.

[0105] [Note 12] In the light source device described in Appendix 11, The heat dissipation member has a heat pipe for transporting heat, The aforementioned heat pipe is A heat receiving section connected to the vapor chamber, The system includes a heat dissipation unit connected to at least one of the plurality of fins, which dissipates the heat received by the heat receiving unit to the at least one fin, A light source device characterized by the following features. With this configuration, heat can be more easily transferred via the heat pipe to fins that are less likely to receive heat from the vapor chamber. This allows for efficient heat transfer to multiple fins, and consequently, easier transfer of heat from the multiple fins to the airflow circulating through the heat dissipation component. Therefore, the cooling efficiency of the light source can be improved.

[0106] [Note 13] A light source device described in any one of the appendices 1 to 12, A light modulator that modulates the light emitted from the light source device, A projection optical device that projects light modulated by the aforementioned optical modulation device, The system includes a fan that circulates airflow through the heat dissipation member, A projector characterized by the following features. With this configuration, the same effects as the light source device described above can be achieved.

[0107] [Note 14] In the projector described in Appendix 13, The aforementioned fan is an axial flow fan. The aforementioned flow port overlaps with the fan when viewed from the fan side, and is located closer to the periphery of the fan than to the center of the fan. A projector characterized by the following features. Generally, the airflow distribution of an axial fan is such that the flow rate is higher closer to the center of the fan and decreases towards the periphery. Therefore, by directing the airflow from a position close to the center of the axial fan to multiple fins, the cooling efficiency of the light source can be ensured, while the cooling efficiency of the wavelength converter can be ensured by directing the airflow from the periphery of the fan to the heat transfer element through the flow port. [Explanation of Symbols]

[0108] 1...Projector, 343, 343B, 343G, 343R...Optical Modulator, 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...Reflector, 505...Drive Unit (Motor), 6...Light Source Housing, 61...Housing Housing, 611...First Surface (First Outer Surface), 612...Second Surface (Second Outer Surface), 613...Third Surface (Third Outer Surface), 62...Lower Housing, 62A...Housing Recess, 63...Lid Member (Gold) Attached component), 64...Duct, 641...First duct section, 642...Second duct section, 65...Heat transfer component, 651...First surface (heat receiving surface), 652...Connection section, 653...Heat receiving pillar, 654...Second surface (outer surface), 655...Protruding part, 656...Heat dissipation pillar, 657...Rectifying section, 66...Outlet, 7...Heat dissipation component, 71...Substrate, 72...Vapor chamber, 73...Heat pipe, 731...Heat receiving section, 732...Heat dissipation section, 74...Heat sink, 75...Fin, 76...Air guide component, SP...Housing space.

Claims

1. A light source that emits light, A heat dissipation member that dissipates heat from the aforementioned light source, A wavelength conversion device that converts the wavelength of light emitted from the light source, A housing having a housing space for housing the light source and the wavelength conversion device, A heat transfer member provided in the housing and constituting a part of the outer surface of the housing, which is thermally connected to the wavelength conversion device, Equipped with, The heat dissipation member is A substrate to which the heat of the light source is transferred, The substrate has a plurality of fins arranged on it, The substrate has a flow port that penetrates the substrate and allows a portion of the airflow flowing to the heat dissipation member to flow to the heat transfer member. A light source device characterized by the following features.

2. In the light source device according to claim 1, The heat transfer member has a plurality of pillars provided on the outer surface of the heat transfer member. A light source device characterized by the following features.

3. In the light source device according to claim 1 or claim 2, The wavelength conversion device is Motor and, A rotating plate rotated by the aforementioned motor, The rotating plate is provided with a phosphor layer that converts the wavelength of incident light, The heat transfer member is connected to the motor in a way that allows for heat transfer. A light source device characterized by the following features.

4. In the light source device according to claim 1 or claim 2, The aforementioned consultation housing is The first outer surface, at least a portion of which is formed by the substrate, The second outer surface intersects with the first outer surface, It includes a third outer surface that intersects with the first outer surface and the second outer surface, and is at least partially formed by the heat transfer member, The airflow that has passed through the aforementioned flow port flows along the second outer surface and then flows along the heat transfer member. A light source device characterized by the following features.

5. In the light source device according to claim 4, The heat transfer member is located on the opposite side of the surface constituting the third outer surface and has a heat receiving surface that receives heat from the gas in the containment space. A light source device characterized by the following features.

6. In the light source device according to claim 4, At least a portion of the second outer surface is made of a metal member that receives heat from the gas in the containment space. A light source device characterized by the following features.

7. In the light source device according to claim 1 or claim 2, The system includes a duct that guides the airflow that has passed through the aforementioned flow port to the heat transfer member. A light source device characterized by the following features.

8. In the light source device according to claim 7, A duct and a heat transfer member are formed by at least one of them, and the heat transfer member is provided on the downstream side in the direction of airflow flowing through it, and has an outlet for discharging the airflow that has flowed through it. A light source device characterized by the following features.

9. In the light source device according to claim 1 or claim 2, The aforementioned flow port is composed of a plurality of openings provided in the substrate at intervals from each other. The substrate is provided between the plurality of openings and has connecting portions that connect the inner edges of each of the plurality of openings. A light source device characterized by the following features.

10. In the light source device according to claim 1 or claim 2, Viewed along the direction of airflow to the heat dissipation member, the airflow opening and at least one of the multiple fins overlap each other. A light source device characterized by the following features.

11. In the light source device according to claim 1 or claim 2, The heat dissipation member is provided on the substrate and has a vapor chamber that receives heat from the light source. The plurality of fins dissipate heat transferred from the vapor chamber. A light source device characterized by the following features.

12. In the light source device according to claim 11, The heat dissipation member has a heat pipe for transporting heat, The aforementioned heat pipe is A heat receiving section connected to the vapor chamber, The system includes a heat dissipation unit connected to at least one of the plurality of fins, which dissipates the heat received by the heat receiving unit to the at least one fin. A light source device characterized by the following features.

13. A light source device according to claim 1 or claim 2, A light modulator that modulates the light emitted from the light source device, A projection optical device that projects light modulated by the aforementioned optical modulation device, The system includes a fan that circulates airflow through the heat dissipation member, A projector characterized by the following features.

14. In the projector according to claim 13, The aforementioned fan is an axial flow fan. The aforementioned flow port overlaps with the fan when viewed from the fan side, and is located closer to the periphery of the fan than to the center of the fan. A projector characterized by the following features.

Images