Light source device and projector

Abstract

Provided are a light source device and a projector capable of protecting an angle conversion member. The light source device includes: a light guide having a side surface extending in a first direction, a first end surface, and a second end surface; an angle converter joined to the first end surface; a base; a substrate which is fixed to the base and on which a light source that emits light toward a side surface is mounted; and a cover member that is fixed to the base and accommodates the angle conversion body therein together with the base, the base having: a first accommodation part that accommodates the light guide body in a state in which the side surface is exposed and to which the light guide body is fixed, and a second accommodation part that accommodates the light guide body in a state in which the side surface is exposed; and a second housing portion that houses, together with the cover member, a portion to be housed from the angle converter to a portion of the light guide on the angle converter side, the second housing portion and the cover member surrounding the periphery of the portion to be housed to form a housing space for housing the portion to be housed, a portion of the light guide fixed to the first housing portion being a fixed end, and a portion of the light guide fixed to the second housing portion being a fixed end. A portion of the light guide on the angle conversion body side, including the first end surface joined to the angle conversion body, is a free end.

Description

Technical Field

[0001] The present invention relates to a light source device and a projector. Background Art

[0002] Conventionally, a light source device having a wavelength conversion device that converts the wavelength of light incident from a light source and then emits it has been known. As such a light source device, a light source device having an elongated columnar wavelength conversion body has been known (for example, refer to Patent Document 1).

[0003] The light source device described in Patent Document 1 includes a wavelength conversion member, a light source unit, an angle conversion member, a reflector, a support member, and a position restricting member.

[0004] The wavelength conversion member contains at least a phosphor, and converts excitation light in a first band into fluorescence in a second band different from the first band. The wavelength conversion member is formed in a quadrangular prism shape and has first to sixth surfaces. The first surface and the second surface intersect the long side direction of the wavelength conversion member and are located on opposite sides of each other. The third to sixth surfaces intersect the first surface and the second surface, respectively.

[0005] The light source unit has a light emitting element that emits excitation light in a first band. The light emitting surface of the light emitting element faces the third surface of the wavelength conversion member.

[0006] The angle conversion member is formed in a quadrangular frustum shape and is fixed to the first surface of the wavelength conversion member by an optical adhesive. The angle conversion member makes the maximum emission angle of the fluorescence emitted from the light emission surface smaller than the maximum incidence angle of the fluorescence incident on the light incident surface from the wavelength conversion member.

[0007] The reflector is provided on the second surface of the wavelength conversion member, and reflects the light incident from the second surface and makes it incident on the wavelength conversion member.

[0008] The support member is provided so as to surround the periphery of the wavelength conversion member, supports the wavelength conversion member, and releases the heat generated by the wavelength conversion member by diffusion to the outside.

[0009] The position restricting member restricts the position of the wavelength conversion member relative to the support member.

[0010] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2023-140582

[0011] In the light source device described in Patent Document 1, the angle conversion member protrudes from the support member. Therefore, there is a problem that the angle conversion member cannot be protected. Therefore, when an external force or the like is applied to the angle conversion member, the angle conversion member may peel off from the light guide body.

[0012] Therefore, a structure that can protect the angle conversion member is desired. Summary of the Invention

[0013] The light source device according to the first aspect of the present disclosure includes: a light guide having: a side surface extending in a first direction; and a first end surface and a second end surface located on opposite sides of each other and intersecting the side surface; an angle conversion body joined to the first end surface and converting the angle of light emitted from the first end surface; a base on which the light guide is disposed; a substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on a side opposite to the base with the light guide therebetween and covering the light guide, and fixed to the base; and a cover member fixed to the base and internally housing the angle conversion body together with the base. The base has: a first housing portion that houses the light guide with the side surface exposed, and the light guide is fixed to the first housing portion; and a second housing portion that, together with the cover member, houses a housed portion from the angle conversion body to a part on the angle conversion body side in the light guide. The second housing portion and the cover member surround the periphery of the housed portion to form a housing space for housing the housed portion. A portion of the light guide fixed to the first housing portion is a fixed end, and a part of the light guide on the angle conversion body side including the first end surface joined to the angle conversion body is a free end.

[0014] The projector according to the second aspect of the present disclosure has: the light source device according to the first aspect; a light modulation device that modulates the light emitted from the light source device to form image light; and a projection optical device that projects the image light.

[0015] The light source device according to the third aspect of the present disclosure includes: a light guide having a side surface extending in a first direction and a first end surface intersecting the side surface; an angle conversion body joined to the first end surface for converting the angle of light emitted from the first end surface; a base on which the light guide is disposed; a substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on a side opposite to the base with the light guide therebetween and fixed to the base; and a cover member having a first inner surface that forms a storage space together with the base, the cover member being disposed on a side opposite to the base with the angle conversion body therebetween and fixed to the base, the storage space storing a stored portion from the angle conversion body to a part of the light guide on the angle conversion body side, the base having: a first storage portion to which the light guide is fixed with the side surface exposed; and a second storage portion having a second inner surface that forms the storage space together with the cover member, the second storage portion storing the stored portion in the storage space together with the cover member, a portion of the light guide fixed to the first storage portion being a fixed end, a part of the light guide on the angle conversion body side including the first end surface joined to the angle conversion body being a free end, and the angle conversion body not contacting the first inner surface and the second inner surface, respectively.

[0016] The light source device according to the fourth aspect of the present disclosure includes: a light guide having a side surface extending in a first direction and a first end surface intersecting the side surface; an angle conversion body joined to the first end surface for converting the angle of light emitted from the first end surface; a holder having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion body, the holder being disposed across the joining portion of the light guide and the angle conversion body; a base on which the light guide is disposed; a substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on a side opposite to the base with the light guide therebetween and fixed to the base; and a cover member having a first inner surface that forms a storage space together with the base, the cover member being disposed on a side opposite to the base with the angle conversion body therebetween and fixed to the base, the storage space storing a stored portion including the holder and from the angle conversion body to a part of the light guide on the angle conversion body side, the base having: a first storage portion to which the light guide is fixed with the side surface exposed; and a second storage portion having a second inner surface that forms the storage space together with the cover member, the second storage portion storing the stored portion in the storage space together with the cover member, a portion of the light guide fixed to the first storage portion being a fixed end, a part of the light guide on the angle conversion body side including the first end surface joined to the angle conversion body being a free end, and the holder not contacting the first inner surface and the second inner surface, respectively.

[0017] The light source device according to the fifth aspect of the present disclosure includes: a light emitting member that extends in a first direction and emits light in the first direction; a base on which the light emitting member is disposed; a light source that emits light incident on the light emitting member along a second direction intersecting the first direction; a substrate on which the light source is mounted, disposed on the side opposite to the base with the light emitting member interposed therebetween in the second direction, and covering a portion of the light emitting member in a direction opposite to the second direction; and a cover member disposed on the side opposite to the base with the light emitting member interposed therebetween. The light emitting member includes: a light guide having: a side surface that extends in the first direction and into which the light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; and an angle conversion body that is joined to the end surface and converts the angle of the light emitted from the end surface. The base has: a first housing portion in which the light guide is fixed with the side surface exposed; and a second housing portion that is provided in the first direction with respect to the first housing portion and forms a housing space together with the cover member, the housing space housing a housed portion of the light emitting member from the angle conversion body to a portion of the light guide in the first direction, and the housed portion not contacting the inner surface of the housing space.

[0018] The light source device according to the sixth aspect of the present disclosure includes: a light emitting member that extends in a first direction and emits light in the first direction; a base on which the light emitting member is disposed; a light source that emits light incident on the light emitting member along a second direction intersecting the first direction; a substrate on which the light source is mounted, disposed on the opposite side of the base across the light emitting member in the second direction, and covering a portion of the light emitting member in the direction opposite to the first direction; and a cover member disposed on the opposite side of the base across the light emitting member. The light emitting member includes: a light guide having: a side surface that extends in the first direction and into which light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; an angle conversion body that is joined to the end surface and converts the angle of light emitted from the end surface; and a holding member having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion body, the holding member being disposed across the joining portion of the light guide and the angle conversion body. The base has: a first receiving portion in which the light guide is fixed with the side surface exposed; and a second receiving portion that is provided in the first direction with respect to the first receiving portion and forms a receiving space together with the cover member, the receiving space receiving a received portion including the holding member and a portion of the light emitting member from the angle conversion body to the portion in the first direction in the light guide, and the received portion not contacting the inner surface of the receiving space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram showing the structure of a projector according to the first embodiment.

[0020] Figure 2 is a perspective view showing the light source device according to the first embodiment.

[0021] Figure 3 is a perspective view showing the light source device according to the first embodiment.

[0022] Figure 4 is a side view showing the fluorescence emitting device according to the first embodiment.

[0023] Figure 5 is a side view showing the fluorescence emitting device according to the first embodiment.

[0024] Figure 6 is an exploded perspective view showing the fluorescence emitting device according to the first embodiment.

[0025] Figure 7 is a six-sided view showing the light emitting member according to the first embodiment.

[0026] Figure 8It is a top view of the light-emitting component after removing the first holding component in the first embodiment.

[0027] Figure 9 It is a rear view of the angle conversion body in the first embodiment.

[0028] Figure 10 It is a diagram showing the optical path of the fluorescence emitted from the light guide and the angle conversion body in the first embodiment.

[0029] Figure 11 It is a perspective view of the first holding component in the first embodiment.

[0030] Figure 12 It is a perspective view of the second holding component in the first embodiment.

[0031] Figure 13 It is a cross-sectional view of the light-emitting component in the first embodiment.

[0032] Figure 14 It is a cross-sectional view of the light-emitting component in the first embodiment.

[0033] Figure 15 It is a cross-sectional view of the light-emitting component in the first embodiment.

[0034] Figure 16 It is an exploded perspective view of the light source device in the first embodiment.

[0035] Figure 17 It is an exploded perspective view of the light source device in the first embodiment.

[0036] Figure 18 It is a perspective view of the base in the first embodiment.

[0037] Figure 19 It is a top view of the base in the first embodiment.

[0038] Figure 20 It is a cross-sectional view of the base in the first embodiment.

[0039] Figure 21 It is a cross-sectional view of the light source device in the first embodiment.

[0040] Figure 22 It is a cross-sectional view of the light source device in the first embodiment.

[0041] Figure 23 It is a cross-sectional view of the light source device in the first embodiment.

[0042] Figure 24 It is a perspective view of a part of the light-emitting component that constitutes the light source device of the projector in the second embodiment.

[0043] Figure 25 It is an exploded perspective view showing a part of a light-emitting component of a light source device included in the projector according to the third embodiment.

[0044] Figure 26 It is a perspective view showing the holder according to the third embodiment.

[0045] Figure 27 It is a view showing a light-emitting component of a light source device included in the projector according to the fourth embodiment.

[0046] Figure 28 It is a cross-sectional view showing a light-emitting component of a light source device included in the projector according to the fifth embodiment.

[0047] Figure 29 It is a cross-sectional view showing a light source device included in the projector according to the sixth embodiment.

[0048] Reference numeral description

[0049] 1: Projector; 27: Light modulation device; 27B: Blue light modulation device; 27G: Green light modulation device; 27R: Red light modulation device; 29: Projection optical device; 3A, 3F: Light source device; 4A: Fluorescent emission device; 5: Light source unit; 51: Substrate; 52: Light source; 521: Light emitting element; 53: Connector; 6A, 6B, 6C, 6D, 6E, 6F: Light emitting component (wavelength conversion component, light transmission component); 61: Light guide (wavelength conversion body); 611: First side; 612: Second side; 613: Third side; 614: Fourth side; 615: First end face; 616: Second end face; 62: Reflection element; 63: Angle conversion body; 631: Incident end face; 632: Emission end face; 633: First side; 634: Second side; 635: Third side; 636: Fourth side; 637: Flange; 64: Adhesive; 65, 65B, 65C, 65D, 65E: Holding member; 651: First connection part; 652: Second connection part; 653: Adhesive avoidance part; 654: Adhesive avoidance part; 66, 66B, 66C, 66E: First holding member; 661: First holding part; 662: First fixing part; 663: First cover part; 664: First connection surface; 665: First recess; 666: Fin; 66C3, 6C3: Through hole; 66C4, 67C4: Locking part; 67, 67B, 67C, 67E: Second holding member; 671: Second holding part; 672: Second fixing part; 673: Second cover part; 674: Second connection surface; 675: Second recess; 676: Fin; 68: Adhesive; 69C: Fixing member; 69C1, 69C2: Screw; 7: Housing; 71: Base; 711: First storage part; 712: Second storage part; 7121, 7122, 7123, 7124: Inner surface; 713: First recess; 714: Second recess; 715: Arrangement part; 72: Fixing member; 73: Biasing member; 74: First cover member (cover member); 741: Storage recess; 742, 743, 744: Inner surface; 75: Second cover member, C1: First corner, C2: Second corner. Detailed implementation mode

[0050] First implementation mode

[0051] Hereinafter, the first implementation mode of the present disclosure will be described based on the drawings.

[0052] Schematic structure of the projector

[0053] Figure 1 It is a schematic diagram showing the structure of the projector 1 of the present implementation mode.

[0054] The projector 1 of the present embodiment is a display device that modulates the light emitted from a light source to form image light and magnifies and projects the formed image light onto a projection surface SC such as a screen. As Figure 1 shown, the projector 1 includes an exterior housing 11 that constitutes the exterior of the projector 1 and an image projection device 2 housed in the exterior housing 11. In addition, although not shown in the figure, the projector 1 includes a control device that controls the operation of the projector 1, a cooling device that cools a cooling target, and a power supply device that supplies power to electronic components that constitute the projector 1.

[0055] Structure of the image projection device

[0056] The image projection device 2 projects image light corresponding to image information under the control of the above control device. The image projection device 2 includes an illumination device 21, a color separation optical system 24, a mirror 25, a collimating lens 26, a light modulation device 27, a color synthesis device 28, and a projection optical device 29.

[0057] The illumination device 21 includes: a first illumination device 22 that emits fluorescence YL including green light GL and red light RL; and a second illumination device 23 that emits blue light BL.

[0058] Structure of the first illumination device

[0059] The first illumination device 22 irradiates the color separation optical system 24 with the fluorescence YL. The first illumination device 22 includes a light source device 3A, a collimating optical system of 221, an integrator optical system 222, a polarization conversion element 223, and an overlapping optical system 224.

[0060] The light source device 3A emits the fluorescence YL. The structure of the light source device 3A will be described in detail later.

[0061] The collimating optical system 221 collimates the fluorescence YL emitted from the light source device 3A.

[0062] The integrator optical system 222 equalizes the illuminance distribution of the fluorescence YL incident from the light source device 3A via the collimating optical system 221. In the present embodiment, the integrator optical system 222 is composed of a first lens array 2221 and a second lens array 2222. Although detailed illustration is omitted, the first lens array 2221 has a plurality of first lenses arranged in a matrix, and the second lens array 2222 has a plurality of second lenses corresponding to the plurality of first lenses. The first lens array 2221 divides the fluorescence YL incident from the collimating optical system 221 into a plurality of partial light beams, and the plurality of partial light beams pass through the corresponding second lenses among the plurality of second lenses. In addition, the integrator optical system 222 may be composed of a rod integrator.

[0063] A plurality of partial light beams emitted from the second lens array 2222 are incident on the polarization conversion element 223. That is, the fluorescent light YL is incident on the polarization conversion element 223. The polarization conversion element 223 converts the incident fluorescent light YL into a linearly polarized light and emits it.

[0064] The overlapping optical system 224 overlaps the partial light beam of the green light GL among the plurality of partial light beams incident via the polarization conversion element 223 with the modulation region of the green light modulation device 27G, and overlaps the partial light beam of the red light RL with the modulation region of the red light modulation device 27R. In addition, the fluorescent light YL emitted from the overlapping optical system 224 is incident on the color separation optical system 24.

[0065] Structure of the second illumination device

[0066] The second illumination device 23 irradiates the blue light BL onto the mirror 25. The second illumination device 23 includes a blue light source 231, a condensing element 232, a homogenizing device 233, and a relay lens 236. The blue light source 231 has at least one light-emitting element that emits the blue light BL.

[0067] The condensing element 232 converges the blue light BL emitted from the blue light source 231 onto the homogenizing device 233. The condensing element 232 has, for example, a plurality of lenses 2321 and 2322.

[0068] The homogenizing device 233 equalizes the illuminance distribution of the blue light BL incident from the condensing element 232. In the present embodiment, the homogenizing device 233 has a diffuser plate 234 and a rod integrator 235.

[0069] The relay lens 236 relays the blue light BL incident from the homogenizing device 233 to the mirror 25.

[0070] Structure of the color separation optical system and the mirror

[0071] The color separation optical system 24 separates the fluorescent light YL incident from the first illumination device 22 into the green light GL and the red light RL, guides the green light GL to the green light modulation device 27G, and guides the red light RL to the red light modulation device 27R. The color separation optical system 24 includes a dichroic mirror 241 and mirrors 242 and 243.

[0072] The dichroic mirror 241 separates the fluorescent light YL incident from the first illumination device 22 into the green light GL and the red light RL.

[0073] The mirror 242 reflects the green light GL reflected by the dichroic mirror 241 toward the green light modulation device 27G.

[0074] The mirror 243 reflects the red light RL that has passed through the dichroic mirror 241 toward the red light modulation device 27R.

[0075] The mirror 25 reflects the blue light BL incident from the second lighting device 23 toward the blue light modulation device 27B.

[0076] Structure of the collimating lens

[0077] The collimating lens 26 is a field lens that collimates the incident light. The collimating lens 26 includes a blue collimating lens 26B, a green collimating lens 26G, and a red collimating lens 26R.

[0078] The blue collimating lens 26B is disposed between the mirror 25 and the blue light modulation device 27B in the optical path of the blue light BL. The blue collimating lens 26B collimates the blue light BL incident on the blue light modulation device 27B.

[0079] The green collimating lens 26G is disposed between the mirror 242 and the green light modulation device 27G in the optical path of the green light GL. The green collimating lens 26G collimates the green light GL incident on the green light modulation device 27G.

[0080] The red collimating lens 26R is disposed between the mirror 243 and the red light modulation device 27R in the optical path of the red light RL. The red collimating lens 26R collimates the red light RL incident on the red light modulation device 27R.

[0081] Structure of the light modulation device

[0082] The light modulation device 27 is an image forming device that modulates the incident light according to image information. The light modulation device 27 includes a blue light modulation device 27B that modulates the blue light BL, a green light modulation device 27G that modulates the green light GL, and a red light modulation device 27R that modulates the red light RL.

[0083] In the present embodiment, each of the light modulation devices 27B, 27G, 27R is composed of a transmissive liquid crystal panel and a pair of polarizing plates sandwiching the liquid crystal panel. That is, the light modulation device 27 is a transmissive liquid crystal light valve.

[0084] Color synthesizing device and projection optical device

[0085] The respective color lights BL, GL, RL modulated by the light modulation devices 27R, 27G, 27B are incident on the color synthesizing device 28. The color synthesizing device 28 synthesizes the incident respective color lights BL, GL, RL to generate image light projected by the projection optical device 29. In the present embodiment, the color synthesizing device 28 is composed of a cross dichroic prism, but may also be composed of a plurality of dichroic mirrors.

[0086] The projection optical device 29 projects the image light synthesized by the color synthesizing device 28 onto the projection surface SC through the projection opening 111 of the outer housing 11. That is, the projection optical device 29 projects the light modulated by the light modulation device 27. As the projection optical device 29, a combined lens having a plurality of lenses and a cylindrical lens barrel that houses the plurality of lenses inside can be exemplified.

[0087] Structure of the light source device

[0088] Figure 2 FIG. is a perspective view of the light source device 3A as viewed from the emission side of the fluorescent light YL. Figure 3 FIG. is a perspective view of the light source device 3A as viewed from the side opposite to the emission side of the fluorescent light YL.

[0089] As Figure 2 and Figure 3 shown, the light source device 3A includes a fluorescent emission device 4A and a housing 7 that houses the fluorescent emission device 4A.

[0090] In the following description, three mutually orthogonal directions are defined as the +X direction, the +Y direction, and the +Z direction. In the present embodiment, the +Z direction is defined as the direction in which the light source device 3A emits the fluorescent light YL, and the +Y direction is defined as the direction in which the cover members 74 and 75 in the housing 7 are located with respect to the base 71 described later. The +X direction is defined as the right direction when viewed from the +Z direction with the +Y direction facing upward. Although not shown, the direction opposite to the +X direction is defined as the -X direction, the direction opposite to the +Y direction is defined as the -Y direction, and the direction opposite to the +Z direction is defined as the -Z direction. Further, the axis along the +X direction is defined as the X axis, the axis along the +Y direction is defined as the Y axis, and the axis along the +Z direction is defined as the Z axis.

[0091] Structure of the fluorescent emission device

[0092] Figure 4 FIG. is a side view of the fluorescent emission device 4A as viewed from the +X direction. Figure 5 FIG. is a side view of the fluorescent emission device 4A as viewed from the +X direction with the first holding member 66 and the second holding member 67 of the holding member 65 separated. Figure 6 FIG. is an exploded perspective view of the fluorescent emission device 4A as viewed from the -Z direction with the first holding member 66 and the second holding member 67 separated.

[0093] The fluorescent emission device 4A is housed in the housing 7 and emits the fluorescent light YL. As Figures 4 to 6 shown, the fluorescent emission device 4A includes a light source unit � and a light emission member 6A.

[0094] Structure of the light source unit

[0095] The light source unit 5 emits light to a light guide 61 of a light emitting member 6A described later. In the present embodiment, the light source unit 5 emits excitation light that excites a phosphor contained in the light guide 61 to the light guide 61. The light source unit 5 is disposed in the +Y direction with respect to the light guide 61. The light source unit 5 includes a substrate 51, a light source 52 mounted on the substrate 51, and a connector 53.

[0096] The substrate 51 is disposed on a side of the housing 7 opposite to a base 71 described later with the light guide 61 interposed therebetween, covers the light guide 61, and is fixed to the base 71. The substrate 51 has a first surface 51A facing the +Y direction and a second surface 51B facing the -Y direction.

[0097] When the substrate 51 is fixed to the base 71, the first surface 51A constitutes an outer surface of the light source device 3A.

[0098] The second surface 51B is a surface opposite to the first surface 51A. The light source 52 and the connector 53 are mounted on the second surface 51B.

[0099] The light source 52 emits excitation light in the -Y direction. The light source 52 is composed of at least one light emitting element 521 arranged along the Z axis, and a light emitting surface of the light emitting element 521 faces a first side surface 611 of the light guide 61 described later. That is, a plurality of light emitting elements 521 emit excitation light incident on the first side surface 611. The excitation light emitted by the light emitting element 521 is, for example, light in a first wavelength band of 400 nm to 480 nm, and a peak wavelength of the excitation light is, for example, 445 nm. In the present embodiment, the light emitting element 521 is an LED (Light Emitting Diode) element, but may be other light emitting elements such as an LD (Laser Diode) element. The connector 53 is disposed on the second surface 51B at a position in the -X direction with respect to the light source 52. Electric power for lighting the light emitting element 521 is supplied to the connector 53 from the outside.

[0100] Structure of the light emitting member

[0101] Figure 7 is a six-sided view showing the light emitting member 6A. Specifically, Figure 7 (A) thereof is a front view showing the light emitting member 6A observed from the +Z direction, Figure 7 (B) thereof is a top view showing the light emitting member 6A observed from the +Y direction, Figure 7 (C) thereof is a rear view showing the light emitting member 6A observed from the -Z direction, Figure 7 (D) thereof is a side view showing the light emitting member 6A observed from the +X direction, Figure 7 and (E) thereof is a side view showing the light emitting member 6A observed from the -X direction. Figure 7(F) is a bottom view of the light emitting component 6A as viewed from the -Y direction. Additionally, the directions included in the figure names do not limit the direction in which the light emitting component 6A is disposed.

[0102] The light emitting component 6A has a function of guiding the light based on the light emitted from the light source unit 5 to the outside of the light source device 3A. In the present embodiment, the light emitting component 6A converts the wavelength of the excitation light emitted from the light source unit 5 to generate fluorescence YL, and guides the fluorescence YL to the outside of the light source device 3A. That is, the light emitting component 6A is a wavelength conversion component and is also a light transmission component.

[0103] As Figures 5 to 7 shown, the light emitting component 6A includes a light guide 61, a reflection element 62, an angle conversion body 63, an adhesive 64, and a holding member 65.

[0104] Structure of the light guide

[0105] The light guide 61 is a light emitting component that receives excitation light incident along the -Y direction from the light emitting element 521. The light guide 61 emits the light based on the incident excitation light in the +Z direction that intersects the -Y direction. In the present embodiment, the light guide 61 contains a phosphor that is excited by the incident excitation light. The light guide 61 generates fluorescence YL having a wavelength different from that of the incident excitation light and emits it in the +Z direction. That is, the light guide 61 is a wavelength conversion body that converts the wavelength of the incident excitation light and emits fluorescence YL. In addition, examples of the phosphor contained in the light guide 61 include a YAG-based phosphor containing yttrium, aluminum, and garnet.

[0106] As Figures 5 to 7 shown, the light guide 61 has a first side surface 611, a second side surface 612, a third side surface 613, a fourth side surface 614, a first end surface 615, and a second end surface 616, and is configured as a substantially quadrangular prism that is long along the Z axis. In addition, the area of the cross section of the light guide 61 orthogonal to the Z axis is substantially constant on the Z axis, and is 0.25 mm 2 or more and 4.00 mm 2 or less.

[0107] The side surfaces 611 to 614 extend along the Z axis. As Figure 5 and Figure 6 shown, the first side surface 611 is an outer surface facing the +Y direction, and the third side surface 613 is an outer surface facing the -Y direction. As Figure 6 shown, the second side surface 612 is an outer surface facing the -X direction, and as Figure 5 shown, the fourth side surface 614 is an outer surface facing the +X direction.

[0108] In addition, as Figure 5 and Figure 6As shown, the first side surface 611 faces the light source 52 and includes an incident region where the excitation light is incident from the light source 52.

[0109] As Figure 7 shown, the light guide 61 has four corner portions C1 to C4 formed by the side surfaces 611 to 614. The first corner portion C1 is formed by the intersecting first side surface 611 and the second side surface 612, and the second corner portion C2 is formed by the intersecting third side surface 613 and the fourth side surface 614. The third corner portion C3 is formed by the intersecting second side surface 612 and the third side surface 613, and the fourth corner portion C4 is formed by the intersecting first side surface 611 and the fourth side surface 614. That is, the second corner portion C2 is the diagonal with respect to the first corner portion C1, and the fourth corner portion C4 is the diagonal with respect to the third corner portion C3.

[0110] Figure 8 is a top view of the light emitting member 6A when observing the state where the first holding member 66 constituting the holding member 65 is removed from the +Y direction.

[0111] As Figure 8 shown, the first end surface 615 and the second end surface 616 are surfaces located on opposite sides of each other on the Z axis. The first end surface 615 is an outer surface facing the +Z direction, and the second end surface 616 is an outer surface facing the -Z direction. The first end surface 615 and the second end surface 616 intersect the side surfaces 611 to 614 respectively. The shapes of the first end surface 615 and the second end surface 616 are both squares.

[0112] The reflection element 62 is pressed against the second end surface 616 by a biasing member 73 described later. The light emitted from the second end surface 616 to the outside of the light guide 61 is reflected by the reflection element 62 and enters the light guide 61 through the second end surface 616, details of which will be described later.

[0113] The first end surface 615 is a light emitting surface for emitting the fluorescence YL generated in the light guide 61. The angle conversion body 63 is joined to the first end surface 615 by an adhesive 64.

[0114] Structure of the angle conversion body

[0115] The angle conversion body 63 is provided on the first end surface 615. The angle conversion body 63 is a Compound Parabolic Concentrator (CPC), and is formed of a light transmissive material such as borosilicate glass and cycloolefin resin into a substantially frustum of a quadrangular pyramid shape. As Figure 5 , Figure 6 and Figure 8 shown, the angle conversion body 63 has an incident end surface 631, an emission end surface 632, side surfaces 633, 634, 635, 636, and a flange 637.

[0116] AsFigure 5 and Figure 8 As shown in Figure 8 , the incident end face 631 is disposed opposite to the first end face 615 and joined to the first end face 615 by an adhesive 64. The fluorescence YL emitted from the first end face 615 is incident on the incident end face 631.

[0117] The emission end face 632 is the face on the side opposite to the incident end face 631. The emission end face 632 emits the fluorescence YL that has entered the light conversion body 63 from the incident end face 631.

[0118] Figure 9 is a rear view of the light conversion body 63 as viewed from the -Z direction.

[0119] The four side faces 633 to 636 are outer surfaces that intersect the incident end face 631 and the emission end face 632 respectively, and are outer surfaces along the circumferential direction centered on the optical axis Ax of the light conversion body 63. Each of the side faces 633 to 636 is a parabolic curved surface.

[0120] As Figure 9 shown, the first side face 633 faces the +Y direction, and the third side face 635 faces the -Y direction. The second side face 634 faces the -X direction, and the fourth side face 636 faces the +X direction. The inner surfaces of the side faces 633 to 636 function as reflecting surfaces that reflect the fluorescence YL that has entered the inside of the light conversion body 63 via the incident end face 631 toward the emission end face 632.

[0121] As Figure 5 and Figure 8 shown, the cross-sectional area of the light conversion body 63 orthogonal to the optical axis Ax, that is, the cross-sectional area of the light conversion body 63 orthogonal to the Z axis, increases as it goes from the incident end face 631 to the emission end face 632, and the area of the emission end face 632 is larger than the area of the incident end face 631.

[0122] As Figure 8 shown, the dimension along the X axis of the side faces 633 and 635 increases as it goes from the incident end face 631 to the emission end face 632.

[0123] As Figure 5 shown, the dimension on the Y axis of the side faces 634 and 636 increases as it goes from the incident end face 631 to the emission end face 632.

[0124] In addition, the X axis and the Y axis are axes orthogonal to the optical axis Ax of the light conversion body 63 along the Z axis. The optical axis Ax of the light conversion body 63 is an axis that passes through the centers of the incident end face 631 and the emission end face 632 respectively and is parallel to the Z axis. The optical axis Ax of the light conversion body 63 coincides with the optical axis of the first illumination device 22.

[0125] The flange 637 is a portion that protrudes radially outward from the end of the light-emitting side of the angle conversion body 63 with respect to the optical axis Ax, and the surface in the +Z direction of the flange 637 coincides with the light-emitting end surface 632. The flange 637 is provided in the angle conversion body 63 in a region where the fluorescent light YL that enters from the incident end surface 631 and exits from the light-emitting end surface 632 does not pass. That is, the flange 637 protrudes radially outward from the region where the fluorescent light YL passes through the light-emitting end surface 632 with respect to the optical axis Ax.

[0126] As Figure 9 shown, the flange 637 has fixing regions 6371 to 6374 provided on the surface 63A facing the -Z direction in the flange 637.

[0127] The first fixing region 6371 is the region in the +Y direction on the surface 63A. [[ID=?]]

[0128] The second fixing region 6372 is the region in the -X direction on the surface 63A.

[0129] The third fixing region 6373 is the region in the -Y direction on the surface 63A.

[0130] The fourth fixing region 6374 is the region in the +X direction on the surface 63A.

[0131] The first fixing region 6371 and the second fixing region 6372 are fixed to the first holding member 66 of the holding member 65, and the third fixing region 6373 and the fourth fixing region 6374 are fixed to the second holding member 67 of the holding member 65.

[0132] Structure of the adhesive

[0133] As Figure 5 、 Figure 6 and Figure 8 shown, the adhesive 64 joins the first end surface 615 of the light guide 61 and the incident end surface 631 of the angle conversion body 63. In the present embodiment, the adhesive 64 is provided in the entire region between the first end surface 615 and the incident end surface 631.

[0134] Here, the fluorescent light YL that enters the inner surface of the first end surface 615 from the inside of the light guide 61 and is incident at an angle equal to or greater than the critical angle undergoes total internal reflection on the inner surface of the first end surface 615, and thus cannot enter the angle conversion body 63. In the region where there is a gap between the first end surface 615 and the incident end surface 631, the critical angle becomes smaller, and therefore, the amount of light of the fluorescent light YL that enters the angle conversion body 63 through the first end surface 615 decreases.

[0135] In contrast, an adhesive 64 is provided in the entire region between the first end face 615 and the incident end face 631. When there is no gap between the first end face 615 and the incident end face 631, it is possible to suppress the decrease in the above-described critical angle and reduce the fluorescence YL that cannot enter the angle conversion body 63. In other words, when there is no gap between the first end face 615 and the incident end face 631, it is possible to easily make the fluorescence YL enter the incident end face 631 from the first end face 615. From this viewpoint, it is preferable that the difference in refractive index between the light guide 61 and the adhesive 64 and the difference in refractive index between the adhesive 64 and the angle conversion body 63 are as small as possible.

[0136] In the present embodiment, the light guide 61 is made of a material containing a YAG-based phosphor, and the angle conversion body 63 is made of a light-transmitting material such as borosilicate glass. The refractive index of the light guide 61 is approximately 1.8, and the refractive index of the angle conversion body 63 is 1.50 or more and 1.55 or less. Therefore, it is difficult to make the refractive index of the light guide 61 coincide with the refractive index of the angle conversion body 63. Therefore, it is preferable to minimize the difference in refractive index between the angle conversion body 63 and the adhesive 64 as much as possible.

[0137] When the angle conversion body 63 is made of borosilicate glass, the refractive index of the angle conversion body 63 is approximately 1.5. In contrast, by forming the adhesive 64 from a phenyl-based silicone resin adhesive and adding an additive as needed, the refractive index of the adhesive 64 is appropriately adjusted, whereby the refractive index of the adhesive 64 that joins the light guide 61 and the angle conversion body 63 can be made approximately 1.5. Thereby, the difference in refractive index between the angle conversion body 63 and the adhesive 64 can be reduced, and the fluorescence YL can easily enter the angle conversion body 63 from the light guide 61. In addition, since the fluorescence YL emitted from the first end face 615 needs to enter the incident end face 631, the adhesive 64 has light-transmitting properties. In addition, the adhesive 64 is preferably a phenyl-based silicone resin adhesive having thermosetting properties or ultraviolet curability among phenyl-based silicone resin adhesives.

[0138] Emission of fluorescence from the light guide and the angle conversion body

[0139] Figure 10 FIG. is a cross-sectional view of the fluorescence emission device 4A along the YZ plane, and is a diagram showing the optical path of the fluorescence YL emitted from the light guide 61 and the angle conversion body 63.

[0140] As Figure 10As shown, when the excitation light EL emitted from the light source 52 is incident on the first side surface 611 of the light guide 61 serving as a wavelength converter, the phosphor contained inside the light guide 61 is excited, and the fluorescence YL diffuses and emits from an arbitrary light-emitting point. The fluorescence YL travels in all directions from an arbitrary light-emitting point, and the fluorescence YL directed toward the side surfaces 611 to 614 of the light guide 61 is totally reflected repeatedly at multiple portions on the inner surfaces of the respective side surfaces 611 to 614, and travels toward the first end surface 615 or the second end surface 616 inside the light guide 61.

[0141] The fluorescence YL that has traveled inside the light guide 61 is emitted from the first end surface 615. The fluorescence YL traveling toward the first end surface 615 is emitted from the first end surface 615 and is incident on the angle converter 63 via the adhesive 64. The fluorescence YL traveling toward the second end surface 616 is reflected by the reflection element 62 and then is incident on the second end surface 616 and travels toward the first end surface 615.

[0142] In addition, a part of the excitation light EL that is not used for exciting the phosphor in the excitation light EL incident on the light guide 61 is reflected by components around the light guide 61 including the light-emitting element 521 of the light source 52 or the reflection element 62 provided on the second end surface 616. Therefore, a part of the excitation light EL is confined inside the light guide 61 and reused. In addition, the components around the light guide 61 include the inner surface of the first accommodation portion 711 of the base 71 described later.

[0143] During the fluorescence YL traveling inside the angle converter 63, every time the fluorescence YL is totally reflected on the inner surface of the side surfaces 633 to 636, the traveling direction of the fluorescence YL changes to a direction closer to being parallel to the optical axis Ax of the angle converter 63. In this way, the angle converter 63 converts the emission angle distribution of the fluorescence YL emitted from the first end surface 615 of the light guide 61. Specifically, the angle converter 63 makes the maximum emission angle of the fluorescence YL in the emission end surface 632 smaller than the maximum incident angle of the fluorescence YL in the incident end surface 631.

[0144] Generally, the optical extent (etendue) of light defined by the product of the area of the light emission region and the solid angle (maximum emission angle) of the light is conserved, so the optical extent of the fluorescence YL is also conserved before and after passing through the angle converter 63. As described above, the area of the emission end surface 632 is larger than the area of the incident end surface 631. Therefore, from the viewpoint of conserving the optical extent, the angle converter 63 can make the maximum emission angle of the fluorescence YL in the emission end surface 632 smaller than the maximum incident angle of the fluorescence YL incident on the incident end surface 631.

[0145] Structure of the holding member

[0146] As Figure 8As shown, the holding member 65 is disposed across the joint portion of the light guide 61 and the angle conversion member 63, holding the light guide 61 and the angle conversion member 63. In other words, the holding member 65 covers the +Z-direction ends of the side surfaces 611 to 614 of the light guide 61, the side surfaces 633 to 636 of the angle conversion member 63, and the adhesive 64, fixing the angle conversion member 63 to the light guide 61. In addition, the holding member 65 has heat dissipation properties, for example, dissipating heat transferred from the light guide 61 and the angle conversion member 63. Such a holding member 65 can be made of metal or synthetic resin.

[0147] As Figures 5 to 7 shown, the holding member 65 has a first holding part 66 and a second holding part 67, and the holding member 65 is formed by the combination of the first holding part 66 and the second holding part 67 with each other.

[0148] Structure of the first holding part

[0149] Figure 11 is a perspective view of the first holding part 66 viewed from the +Z direction.

[0150] The first holding part 66 is disposed in the +Y direction and the -X direction with respect to the light guide 61 and the angle conversion member 63 and is connected to the second holding part 67. As Figure 11 shown, when viewed from the -Z direction or the +Z direction, the first holding part 66 is formed in a substantially right-angled isosceles triangular prism shape. The first holding part 66 has a first holding portion 661, a first fixing portion 662, a first cover portion 663, a first connection surface 664, and a first recess 665.

[0151] The first holding portion 661 holds the first side surface 611 and the second side surface 612 of the light guide 61. That is, the first holding portion 661 is provided at a portion of the first holding part 66 corresponding to the portion of the light guide 61 that is closer to the -Z direction than the first end surface 615. The first holding portion 661 is formed by a recess having a first contact portion June 6611 along the XZ plane and a second contact portion June 6612 along the YZ plane.

[0152] The first contact portion 6611 contacts the first side surface 611. The first contact portion 6611 is formed in a substantially arc shape protruding in the -Y direction. Specifically, the first contact portion 6611 is formed in a frustum shape whose size along the +Z direction decreases as it protrudes in the -Y direction, and the surface of the end portion in the protruding direction of the first contact portion 6611 is formed in an arc shape centered on the axis along the Z axis. Therefore, the first contact portion 6611 is in line contact with the first side surface 611 along the Z axis. The second contact portion 6612 contacts the second side surface 612. The second contact portion 6612 is formed in a substantially arc shape protruding in the +X direction. Specifically, the second contact portion 6612 is formed in a frustum shape whose size along the +Z direction decreases as it protrudes in the +X direction, and the surface of the end portion in the protruding direction of the second contact portion 6612 is formed in an arc shape centered on the axis along the Z axis. Therefore, the second contact portion 6612 is in line contact with the second side surface 612 along the Z axis.

[0153] The first fixing portion 662 is the portion fixed to the angle conversion body 63, and is provided on the surface 66A of the first holding member 66 facing the +Z direction. The first fixing portion 662 has a first fixing region 6621 and a second fixing region 6622.

[0154] The first fixing region 6621 is located in the +Y direction on the surface 66A and extends along the X axis. The first fixing region 6621 is fixed to the first fixing region 6371 of the flange 637 using an adhesive.

[0155] The second fixing region 6622 is located in the -X direction on the surface 66A and extends along the Y axis. The second fixing region 6622 is fixed to the second fixing region 6372 of the flange 637 using an adhesive.

[0156] The first cover portion 663 is a recess provided in the +Z direction with respect to the first holding portion 661. When the first holding member 66 and the second holding member 67 are connected, the first cover portion 663 forms a space for accommodating the angle conversion body 63 inside. The first cover portion 663 has a first inner surface 6631 along the XZ plane and a second inner surface 6632 along the YZ plane.

[0157] The first inner surface 6631 is a surface facing the -Y direction and faces the first side surface 633 of the angle conversion body 63.

[0158] The second inner surface 6632 is a surface facing the +X direction and faces the second side surface 634 of the angle conversion body 63.

[0159] The first connecting surface 664 is a surface facing the +X direction and the -Y direction, and is inclined by approximately 45° with respect to the XZ plane and the YZ plane respectively. A pair of first connecting surfaces 664 are provided with the first holding portion 661 and the first cover portion 663 interposed therebetween. That is, the first connecting surface 664 includes a first connecting region 6641 and a second connecting region 6642 located on the opposite side of the first connecting region 6641 with the first holding portion 661 and the first cover portion 663 interposed therebetween. The second connecting region 6642 is provided in the -Y direction with respect to the first connecting region 6641.

[0160] When the first holding member 66 and the second holding member 67 are connected, the first connecting surface 664 is joined to a second connecting surface 674, which will be described later, of the second holding member 67 via an adhesive.

[0161] The first recess 665 is a recess in a portion of the first connecting surface 664 on the side of the first holding portion 661, and together with a second recess 675 of the second holding member 67, constitutes an adhesive avoiding portion 653, 654, which will be described later. Two first recesses 665 are provided in the first holding member 66.

[0162] The two first recesses 665 include a first recess 6651 in a portion of the first connecting region 6641 on the side of the first holding portion 661 and a first recess 6652 in a portion of the second connecting region 6642 on the side of the first holding portion 661.

[0163] Structure of the second holding member

[0164] Figure 12 is a perspective view showing the second holding member 67 as viewed from the +Z direction.

[0165] The second holding member 67 is connected to the first holding member 66, holds the light guide 61, and fixes the angle conversion body 63 to the light guide 61. As Figure 12 shown, the second holding member 67 has a structure that is line-symmetric with respect to the first holding member 66 about the optical axis Ax of the angle conversion body 63. That is, the second holding member 67 is mirror-symmetric with respect to the first holding member 66. The second holding member 67 has a second holding portion 671, a second fixing portion 672, a second cover portion 673, a second connecting surface 674, and a second recess 675.

[0166] The second holding portion 671 holds the third side surface 613 and the fourth side surface 614 of the light guide 61. That is, the second holding portion 671 is provided at a position of the second holding member 67 corresponding to a portion of the light guide 61 that is farther in the -Z direction than the first end surface 615. The second holding portion 671 is formed by a recess having a third contact portion 6711 along the XZ plane and a fourth contact portion 6712 along the YZ plane.

[0167] The third contact portion 6711 contacts the third side surface 613. The third contact portion 6711 is formed in a substantially arc shape protruding in the +Y direction. Specifically, the third contact portion 6711 is formed in a frustum shape whose size along the +Z direction decreases as it protrudes in the +Y direction, and the surface of the end portion in the protruding direction of the third contact portion 6711 is formed in an arc shape centered on the axis along the Z axis. Therefore, the third contact portion 6711 is in line contact with the third side surface 613 along the Z axis. The fourth contact portion 6712 contacts the fourth side surface 614. The fourth contact portion 6712 is formed in a substantially arc shape protruding in the -X direction. Specifically, the fourth contact portion 6712 is formed in a frustum shape whose size along the +Z direction decreases as it protrudes in the -X direction, and the surface of the end portion in the protruding direction of the fourth contact portion 6712 is formed in an arc shape centered on the axis along the Z axis. Therefore, the fourth contact portion 6712 is in line contact with the fourth side surface 614 along the Z axis.

[0168] The second fixing portion 672 is the portion fixed to the angle conversion body 63 and is disposed on the surface 67A of the second holding member 67 facing the +Z direction. The second fixing portion 672 has a third fixing area 6721 and a fourth fixing area 6722.

[0169] The third fixing area 6721 is located in the -Y direction on the surface 67A and extends along the X axis. The third fixing area 6721 is fixed to the third fixing area 6373 of the flange 637 using an adhesive.

[0170] The fourth fixing area 6722 is located in the +X direction on the surface 67A and extends along the Y axis. The fourth fixing area 6722 is fixed to the fourth fixing area 6374 of the flange 637 using an adhesive.

[0171] The second cover portion 673 is a recess provided in the +Z direction with respect to the second holding portion 671. The second cover portion 673 forms a space for accommodating the angle conversion body 63 inside when the first holding member 66 and the second holding member 67 are combined. The second cover portion 673 has a third inner surface 6731 along the XZ plane and a fourth inner surface 6732 along the YZ plane.

[0172] The third inner surface 6731 is a surface facing the +Y direction and faces the third side surface 635 of the angle conversion body 63.

[0173] The fourth inner surface 6732 is a surface facing the -X direction and faces the fourth side surface 636 of the angle conversion body 63.

[0174] The second connecting surface 674 is a surface facing the -X direction and the +Y direction, and is inclined by approximately 45° with respect to the XZ plane and the YZ plane, respectively. A pair of second connecting surfaces 674 are provided with the second holding portion 671 and the second cover portion 673 interposed therebetween. That is, the second connecting surface 674 includes a third connecting region 6741 and a fourth connecting region 6742 located on the opposite side of the third connecting region 6741 with the second holding portion 671 and the second cover portion 673 interposed therebetween. The fourth connecting region 6742 is provided in the -Y direction with respect to the third connecting region 6741.

[0175] The second connecting surface 674 is joined to the first connecting surface 664 of the first holding member 66 via an adhesive 68. At this time, the third connecting region 6741 is joined to the first connecting region 6641, and the fourth connecting region 6742 is joined to the second connecting region 6642. That is, when the first holding member 66 and the second holding member 67 are connected, the first connecting surface 664 and the second connecting surface 674 face each other and are parallel to each other. In addition, the adhesive 68 that joins the first connecting surface 664 and the second connecting surface 674 can be formed of a light-transmissive adhesive, similarly to the adhesive 64.

[0176] The second recess 675 is a recess in a portion of the second connecting surface 674 on the side of the second holding portion 671, and together with the first recess 665 of the first holding member 66, forms adhesive avoiding portions 653 and 654, which will be described later. Two second recesses 675 are provided in the second holding member 67.

[0177] The two second recesses 675 include a second recess 6751 in a portion of the third connecting region 6741 on the side of the second holding portion 671 and a second recess 6752 in a portion of the fourth connecting region 6742 on the side of the second holding portion 671. The second recess 6751 and the first recess 6651 together form the adhesive avoiding portion 653, and the second recess 6752 and the first recess 6652 together form the adhesive avoiding portion 654, which will be described in detail later.

[0178] Fixing of the angle conversion body to the light guide by the holder

[0179] Figure 13 It is a view showing a cross section of the light emitting member 6A along the XZ plane. In other words, Figure 13 It is Figure 4 A cross-sectional view taken along line XIII-XIII of

[0180] As described above, the holder 65 is constituted by combining the first holding member 66 and the second holding member 67. Specifically, as Figure 13As shown, the first holding member 66 and the second holding member 67 are combined by bonding the first connection region 6641 and the third connection region 6741 with an adhesive 68, and bonding the second connection region 6642 and the fourth connection region 6742.

[0181] In this way, the first connection portion 651 that connects the first holding member 66 and the second holding member 67 is formed by bonding the first connection region 6641 and the third connection region 6741 with the adhesive 68. In addition, the second connection portion 652 that connects the first holding member 66 and the second holding member 67 is formed by bonding the second connection region 6642 and the fourth connection region 6742 with the adhesive 68. That is, the holder 65 includes connection portions 651 and 652 that connect the first holding member 66 and the second holding member 67 in a state where the first connection surface 664 and the second connection surface 674 face each other.

[0182] When the first holding member 66 and the second holding member 67 are connected, an adhesive avoiding portion 653 is formed by the first recess 6651 of the first holding member 66 and the second recess 6751 of the second holding member 67, and an adhesive avoiding portion 654 is formed by the first recess 6652 of the first holding member 66 and the second recess 6752 of the second holding member 67. That is, the holder 65 has adhesive avoiding portions 653 and 654.

[0183] Each of the adhesive avoiding portions 653 and 654 is a portion that suppresses the remaining adhesive 68 from flowing into the light guide 61. The adhesive avoiding portion 653 is provided between the first connection portion 651 and the light guide 61, and the adhesive avoiding portion 654 is provided between the second connection portion 652 and the light guide 61. It is a portion that widens between the first connection surface 664 and the second connection surface 674. Specifically, the distance between the first connection surface 664 and the second connection surface 674 in the adhesive avoiding portion 653 is larger than the distance between the first connection surface 664 and the second connection surface 674 in the connection portion 651. In addition, the distance between the first connection surface 664 and the second connection surface 674 in the adhesive avoiding portion 654 is larger than the distance between the first connection surface 664 and the second connection surface 674 in the connection portion 652.

[0184] Figure 14 It is a view showing a cross section of the light emitting member 6A along the YZ plane. Figure 15 It is a view showing a cross section of the light emitting member 6A along the XZ plane.

[0185] When the holder 65 is installed on the light guide 61 and the angle converter 63, as Figure 14 and Figure 15As shown, the first holding part 661 and the second holding part 671 of the holding member 65 hold the side surfaces 611 - 614 of the light guide 61, and the first fixing part 662 and the second fixing part 672 of the holding member 65 are fixed to the flange 637 of the angle converter 63.

[0186] Specifically, as Figure 14 shown, the first contact part 6611 of the first holding part 661 is in line contact with the first side surface 611 of the light guide 61 along the Z-axis, and the third contact part 6711 of the second holding part 671 is in line contact with the third side surface 613 of the light guide 61 along the Z-axis.

[0187] In addition, the first fixing area 6621 of the first fixing part 662 is fixed to the first fixing area 6371 of the flange 637 by an adhesive, and the third fixing area 6721 of the second fixing part 672 is fixed to the third fixing area 6373 of the flange 637 by an adhesive.

[0188] In addition, as Figure 15 shown, the second contact part 6612 of the first holding part 661 is in line contact with the second side surface 612 of the light guide 61 along the Z-axis, and the fourth contact part 6712 of the second holding part 671 is in line contact with the fourth side surface 614 of the light guide 61 along the Z-axis.

[0189] In addition, the second fixing area 6622 of the first fixing part 662 is fixed to the second fixing area 6372 of the flange 637 by an adhesive, and the fourth fixing area 6722 of the second fixing part 672 is fixed to the fourth fixing area 6374 of the flange 637 by an adhesive.

[0190] In this way, the holding member 65 disposed across the adhesive 64 forming the joint portion between the light guide 61 and the angle converter 63 can prevent the angle converter 63 from peeling off from the light guide 61. Moreover, since the holding member 65 and the light guide 61 are in line contact at the respective contact parts 6611, 6612, 6711, 6712, the contact area between the holding member 65 and the light guide 61 can be reduced. Thereby, leakage of the fluorescent YL and the excitation light EL from the light guide 61 can be suppressed.

[0191] Structure of the housing

[0192] Figure 16 is an exploded perspective view of the light source device 3A viewed from the +Z direction, Figure 17 is an exploded perspective view of the light source device 3A viewed from the -Z direction.

[0193] As Figure 2 , Figure 3 , Figure 16 and Figure 17As shown, the housing 7 supports the fluorescent emission device 4A and houses the light emission component 6A of the fluorescent emission device 4A inside. As Figure 16 and Figure 17 shown, the housing 7 includes a base 71, two fixing components 72, a biasing component 73, a first cover component 74, and a second cover component 75.

[0194] Structure of the base

[0195] The base 71 supports the fluorescent emission device 4A from the -Y direction. That is, the light emission component 6A is disposed on the base 71. In addition, the first cover component 74 and the second cover component 75 are fixed to the base 71. The base 71 is a metal body formed of, for example, metals such as aluminum, iron, and stainless steel, and has heat dissipation properties.

[0196] Viewed from the +Y direction, the base 71 is formed in a rectangular plate shape that is long along the Z axis. The base 71 has surfaces 71A, 71B, 71C, 71D, 71E, and 71F.

[0197] In the base 71, the first surface 71A is the surface facing the +Y direction, and the second surface 71B is the surface facing the -Y direction. The second surface 71B is the surface on the opposite side of the first surface 71A.

[0198] In the base 71, the third surface 71C is the surface facing the +Z direction, and the fourth surface 71D is the surface facing the -Z direction. The fourth surface 71D is the surface on the opposite side of the third surface 71C.

[0199] In the base 71, the fifth surface 71E is the surface facing the -X direction, and the sixth surface 71F is the surface facing the +X direction. The sixth surface 71F is the surface on the opposite side of the fifth surface 71E.

[0200] Thus, the surfaces 71C, 71D, 71E, and 71F are surfaces that intersect the first surface 71A and the second surface 71B respectively.

[0201] Figure 18 is a perspective view of the base 71 viewed from the +Y direction, Figure 19 is a top view of the base 71 viewed from the +Y direction. In addition, in Figure 18 and Figure 19 the state in which the light emission component 6A is disposed is shown for the base 71.

[0202] The base 71 further has a first storage portion 711, a second storage portion 712, a first recess 713, a second recess 714, a disposition portion 715, and a third recess 716, and the portions 711 to 715 are provided on the first surface 71A.

[0203] Structure of the first storage portion

[0204] Figure 20FIG. is a cross-sectional view of the base 71 along the XY plane of the first storage portion 711. In other words, Figure 20 FIG. is a view showing Figure 19 a cross-section of the base 71 at the XX-XX line of

[0205] The first storage portion 711 stores the light guide 61. Specifically, the light guide 61 is fixed to the first storage portion 711 with the first side surface 611 exposed. The first storage portion 711 is a groove portion that extends linearly along the Z axis and opens in the +Y direction. Specifically, the first storage portion 711 is provided at the center of the X axis of the first surface 71A and extends along the Z axis.

[0206] As Figure 20 shown, the first storage portion 711 has a support surface 7111, a first wall surface 7112, and a second wall surface 7115 as inner surfaces, and the cross-section of the first storage portion 711 along the XY plane is substantially U-shaped.

[0207] The support surface 7111 is a surface facing the +Y direction and corresponds to the bottom surface of the first storage portion 711. When the light guide 61 is disposed in the first storage portion 711, the support surface 7111 supports the third side surface 613.

[0208] The first wall surface 7112 and the second wall surface 7115 intersect the support surface 7111 and face each other. The first wall surface 7112 faces the +X direction, and the second wall surface 7115 faces the -X direction. When the light guide 61 is disposed in the first storage portion 711, the first wall surface 7112 faces the second side surface 612, and the second wall surface 7115 faces the fourth side surface 614. In addition, a gap is provided between the first wall surface 7112 and the second side surface 612, and a gap is provided between the second wall surface 7115 and the fourth side surface 614.

[0209] The first wall surface 7112 has a first portion 7113 in the +Y direction away from the support surface 7111 and a second portion 7114 in the -Y direction close to the support surface 7111.

[0210] The first portion 7113 is a surface perpendicular to the support surface 7111.

[0211] The second portion 7114 is an inclined surface that inclines so as to approach the second wall surface 7115 as it goes from the end of the first portion 7113 on the support surface 7111 side toward the support surface 7111. In other words, the second portion 7114 inclines so as to approach the second side surface 612 as it goes toward the support surface 7111.

[0212] The second wall surface 7115 is also configured in the same manner as the first wall surface 7112. That is, the second wall surface 7115 has a first portion 7116 in the +Y direction away from the support surface 7111 and a second portion 7117 in the -Y direction close to the support surface 7111.

[0213] The first portion 7116 is a surface perpendicular to the support surface 7111, and the second portion 7117 is an inclined surface that is inclined so as to approach the first wall surface 7112 and the fourth side surface 614 as it goes from the end portion on the support surface 7111 side of the first portion 7116 toward the support surface 7111.

[0214] Such a first storage portion 711 can be formed by machining the base 71. Therefore, each of the wall surfaces 7112 and 7115 is formed by the surface of the above metal.

[0215] In the present embodiment, mirror finishing is further performed on each of the wall surfaces 7112 and 7115, and each of the wall surfaces 7112 and 7115 has a reflective property. Therefore, each of the wall surfaces 7112 and 7115 reflects the incident excitation light EL. In addition, each of the wall surfaces 7112 and 7115 may be formed of another metal film or a dielectric multilayer film formed on the surface of the above metal.

[0216] Here, the dimension along the X-axis of the light emitting surface of the light emitting element 521 constituting the light source 52 is larger than the dimension along the X-axis of the light guide 61 and smaller than the dimension along the X-axis between the first portion 7113 and the first portion 7116. Therefore, both end portions of the light emitting surface of the light emitting element 521 on the X-axis protrude outside the first side surface 611 of the light guide 61. On the other hand, the dimension along the X-axis of the support surface 7111 is larger than the dimension along the X-axis of the light guide 61.

[0217] Therefore, a part of the excitation light EL emitted from the light emitting element 521 advances through the gap between the second side surface 612 of the light guide 61 and the first portion 7113 of the first wall surface 7112, and then is reflected by the second portion 7114 inclined with respect to the support surface 7111 and enters the second side surface 612. The same applies to the excitation light EL passing through the gap between the fourth side surface 614 of the light guide 61 and the second wall surface 7115. Thus, it is possible to make the excitation light EL passing through the gap between the second side surface 612 and the first wall surface 7112 and the excitation light EL passing through the gap between the fourth side surface 614 and the second wall surface 7115 easily enter the light guide 61.

[0218] Structure of the second storage portion

[0219] Figure 21 is a view showing a part of a cross section along the XZ plane in the second storage portion 712 of the light source device 3A.

[0220] AsFigure 18 and Figure 19 As shown, the second storage portion 712 is provided in the +Z direction relative to the first storage portion 711. Figure 21 As shown, the second housing portion 712 is a recessed portion having inner surfaces 7121, 7122, 7123, and 7124 and opening in the +Y and +Z directions, and is formed into a rectangular shape when viewed from the +Y direction. The inner surfaces 7121, 7122, 7123, and 7124 correspond to the second inner surfaces.

[0221] The inner surface 7121 is a surface facing the +Y direction and constitutes the bottom of the second storage portion 712 .

[0222] The inner surface 7122 faces the +X direction, and the inner surface 7123 faces the −X direction. The inner surface 7122 and the inner surface 7123 face each other.

[0223] The inner surface 7124 is a surface facing the +Z direction.

[0224] The second housing portion 712 communicates with the first housing portion 711 that houses the light guide 61, and houses a portion of the housed portion 6AP of the light emitting component 6A. Specifically, when the first cover member 74 is secured to the base 71, the second housing portion 712 and the first cover member 74 together form a housing space SP that houses the housed portion 6AP of the light emitting component 6A.

[0225] The accommodated portion 6AP is the portion of the light emitting member 6A that is housed within the accommodation space SP. The accommodated portion 6AP is comprised of the +Z-direction end of the light guide 61, the angle converter 63, the adhesive 64, and the holder 65. The second housing portion 712 houses the -Y-direction portion of the accommodated portion 6AP.

[0226] Structure of the first recess and the second recess

[0227] like Figure 18 as well as Figure 19 As shown, the first recess 713 and the second recess 714 are recesses extending along the X-axis, spanning the first housing portion 711 extending along the Z-axis. They are recessed from the first surface 71A in the -Y direction. The first recess 713 and the second recess 714 are separated from each other along the Z-axis, with the second recess 714 positioned in the -Z direction relative to the first recess 713. The first fixing member 72A of the fixing member 72 is disposed in the first recess 713, and the second fixing member 72B of the fixing member 72 is secured to the second recess 714 via screws.

[0228] Structure of the arrangement portion and the third recess

[0229] The arrangement part 715 is a recessed part that is provided at the end in the -Z direction in the first surface 71A and recessed from the first surface 71A in the -Y direction. A biasing member 73 is arranged in the arrangement part 715. The arrangement part 715 is covered by the second cover member 75 in the +Y direction.

[0230] The third recessed part 716 is a recessed part that is recessed from the fifth surface 71E of the base 71 in the +X direction and opens in the -X direction, +Y direction, and -Y direction, respectively. When the light source unit 5 is fixed to the base 71, the connector 53 of the substrate 51 is arranged in the third recessed part 716.

[0231] Structure of the fixing member

[0232] Two fixing members 72 are respectively fixed to the base 71 in a state where the light guide 61 is pressed against the base 71 from the +Y direction. The two fixing members 72 include a first fixing member 72A arranged in the first recessed part 713 and a second fixing member 72B arranged in the second recessed part 714. The second fixing member 72B is separated from the first fixing member 72A in the -Z direction.

[0233] Each of the fixing members 72A and 72B has two fixing parts 721 and a pressing part 722, and is formed of a leaf spring in the present embodiment.

[0234] The two fixing parts 721 are provided at both ends in the long side direction of the fixing member 72 along the X axis. Each fixing part 721 is fixed to the bottom surface of the first recessed part 713 or the bottom surface of the second recessed part 714 by a screw.

[0235] The pressing part 722 is provided at a position sandwiched by the two fixing parts 721. The pressing part 722 contacts the first side surface 611 of the light guide 61 and presses the light guide 61 against the supporting surface 7111 of the first accommodating part 711. Thereby, the light guide 61 is fixed to the first accommodating part 711.

[0236] Structure of the biasing member and the second cover member

[0237] The biasing member 73 is arranged in the arrangement part 715 and biases the reflecting element 62 toward the second end surface 616 of the light guide 61. The biasing member 73 can be formed of a leaf spring, for example.

[0238] As Figure 16 and Figure 17 shown, the second cover member 75 is fixed to the base 71 and covers the biasing member 73 arranged in the arrangement part 715 in the +Y direction. The second cover member 75 is arranged in the -Z direction with respect to the substrate 51 of the light source unit 5 and is fixed to the end in the -Z direction of the base 71.

[0239] Structure of the first cover member

[0240] As Figure 16 andFigure 17 As shown, the first cover member 74 is disposed in the +Z direction with respect to the substrate 51 of the light source unit 5, and is fixed to the base 71 so as to cover the second storage portion 712 in the +Y direction. By combining with the base 71, the first cover member 74 surrounds the periphery of the stored portion 6AP of the light emitting member 6A disposed on the base 71, and forms a storage space SP for storing the stored portion 6AP.

[0241] The first cover member 74 is made of metal or the like and has heat dissipation properties.

[0242] The first cover member 74 has a first surface 74A, a second surface 74B, a third surface 74C, a fourth surface 74D, a fifth surface 74E, and a sixth surface 74F.

[0243] The first surface 74A is the surface facing the +Y direction.

[0244] The second surface 74B is the surface facing the -Y direction, and is the surface on the opposite side of the first surface 74A. When the first cover member 74 is disposed on the base 71, the second surface 74B faces the first surface 71A of the base 71.

[0245] The third surface 74C is the surface facing the +Z direction. When the first cover member 74 is fixed to the base 71, the third surface 74C substantially coincides with the extended surface of the third surface 71C of the base 71.

[0246] The fourth surface 74D is the surface facing the -Z direction, and is the surface on the opposite side of the third surface 74C. The fourth surface 74D faces the surface of the substrate 51 of the light source unit 5 in the +Z direction.

[0247] The fifth surface 74E is the surface facing the -X direction. The sixth surface 74F is the surface facing the +X direction, and is the surface on the opposite side of the fifth surface 74E. When the first cover member 74 is fixed to the base 71, the fifth surface 74E substantially coincides with the extended surface of the fifth surface 71E of the base 71, and the sixth surface 74F substantially coincides with the extended surface of the sixth surface 71F of the base 71.

[0248] Figure 22 It is a view showing a part of the cross section of the light source device 3A along the YZ plane. Specifically, Figure 22 It is a view showing a part of the cross section of the light source device 3A including the optical axis Ax of the angle conversion body 63. Figure 23 It is a view showing a part of the cross section of the first cover member 74 of the light source device 3A along the XZ plane.

[0249] The first cover member 74 also has a storage recess 741.

[0250] The accommodation recess 741 is a recess that is recessed from the second surface 74B in the +Y direction and opens in the -Y direction, +Z direction, and -Z direction. That is, the accommodation recess 741 penetrates the first cover member 74 along the Z axis. The accommodation recess 741 has Figure 22 the inner surface 742 shown in Figure 23 and the inner surfaces 743 and 744 shown in

[0251] The inner surface 742 is the inner surface facing the -Y direction.

[0252] The inner surface 743 is the inner surface facing the +X direction. The inner surface 743 is substantially flush with the extended surface of the inner surface 7122 of the second accommodation portion 712.

[0253] The inner surface 744 is the inner surface facing the -X direction. The inner surface 744 is substantially flush with the extended surface of the inner surface 7123 of the second accommodation portion 712.

[0254] The inner surface 743 and the inner surface 744 face each other and intersect the inner surface 742.

[0255] The dimension between the inner surface 742 and the inner surface 743, that is, the dimension of the accommodation recess 741 on the X axis is substantially the same as the dimension of the second accommodation portion 712 on the X axis, and the dimension of the accommodation recess 741 on the Z axis is substantially the same as the dimension of the second accommodation portion 712 on the Z axis.

[0256] When the first cover member 74 is disposed on the base 71, the accommodation recess 741 of the first cover member 74 and the second accommodation portion 712 of the base 71 form the above-mentioned accommodation space SP. That is, the accommodation recess 741 accommodates the +Y direction portion of the portion to be accommodated 6AP.

[0257] Configuration of the portion to be accommodated in the accommodation space

[0258] In the light guide 61, the portion fixed to the first accommodation portion 711 by the fixing member 72 is the fixed end. Specifically, the portion in the -Z direction from the contact portion with the first fixing member 72A in the light guide 61 is the fixed end fixed to the first accommodation portion 711.

[0259] On the other hand, in the light guide 61, the portion in the +Z direction from the contact portion with the first fixing member 72A is the free end. Specifically, the portion in the +Z direction from the contact portion with the first fixing member 72A in the light guide 61 and a part on the side of the light conversion body 63 including the first end face 615 that is joined to the light conversion body 63 in the light guide 61 is the free end.

[0260] In other words, in the light-emitting member 6A, the portion in the -Z direction starting from the contact portion with the first fixing member 72A is the fixed end, and the portion in the +Z direction starting from the contact portion with the first fixing member 72A is the free end. The free end of the light-emitting member 6A includes the received portion 6AP.

[0261] As Figures 21 to 23 shown, such a received portion 6AP does not contact the inner surfaces 7121 to 7124 of the second receiving portion 712 forming the receiving space SP and the inner surfaces 742 to 744 of the first cover member 74, respectively.

[0262] Here, when the excitation light EL is incident from the light source unit 5, the light guide 61 as the wavelength converter generates heat and expands. In this case, the received portion 6AP elongates in the +Z direction.

[0263] In contrast, as Figures 21 to 23 shown, the received portion 6AP does not contact the second receiving portion 712 and the first cover member 74 on the Z axis.

[0264] In addition, as Figure 22 shown, in the state where the light guide 61 is not expanded, the received portion 6AP is separated from the inner surface 7124 of the second receiving portion 712 located in the -X direction with respect to the received portion 6AP, and a gap GP1 is provided between the received portion 6AP and the inner surface 7124. Further, in the state where the light guide 61 is not expanded, the received portion 6AP is separated from the substrate 51 of the light source unit 5 located in the -X direction with respect to the received portion 6AP, and a gap GP2 is provided between the received portion 6AP and the substrate 51. Therefore, even in the state where the light guide 61 is not expanded, the received portion 6AP does not contact the inner surface 7124 and the substrate 51. Therefore, even when the light guide 61 expands or contracts along the Z axis, it is possible to prevent the received portion 6AP from contacting the inner surfaces 7121 to 7124 of the second receiving portion 712 forming the receiving space SP and the inner surfaces 742 to 744 of the first cover member 74, respectively.

[0265] On the other hand, when an impact in a direction crossing the Z axis is applied to the light source device 3A, the received portion 6AP swings in the direction of the impact and the direction opposite to the direction of the impact.

[0266] In contrast, as Figure 22As shown, on the Y-axis, a gap GP3 is provided between the housed portion 6AP and the inner surface 7121 of the second housing portion 712, and a gap GP4 is provided between the housed portion 6AP and the inner surface 742 of the housing recess 741. That is, the housed portion 6AP does not contact the inner surface 7121 of the second housing portion 712 and the inner surface 742 of the housing recess 741 on the Y-axis. Therefore, when an impact acts on the light source device 3A along the Y-axis, contact between the housed portion 6AP and at least one of the inner surface 7121 of the second housing portion 712 and the inner surface 742 of the housing recess 741 is suppressed.

[0267] In addition, as Figure 21 shown, on the X-axis, a gap GP5 is provided between the housed portion 6AP and the inner surface 7122 of the second housing portion 712, and a gap GP6 is provided between the housed portion 6AP and the inner surface 7123 of the second housing portion 712. Therefore, the housed portion 6AP does not contact the inner surfaces 7122 and 7123 of the second housing portion 712 on the X-axis.

[0268] As Figure 23 shown, on the X-axis, a gap GP7 is provided between the housed portion 6AP and the inner surface 743 of the housing recess 741, and a gap GP8 is provided between the housed portion 6AP and the inner surface 744 of the housing recess 741. Therefore, the housed portion 6AP does not contact the inner surfaces 743 and 744 of the housing recess 741 on the X-axis.

[0269] Therefore, when an impact acts on the light source device 3A along the X-axis, contact between the housed portion 6AP and at least one of the inner surface 7122 of the second housing portion 712 and the inner surface 743 of the housing recess 741 and the inner surface 7123 of the second housing portion 712 and the inner surface 744 of the housing recess 741 is suppressed.

[0270] In other words, the housing 7 has an opening AP that opens in the +Z direction and houses the housed portion 6AP therein. The opening AP is an opening through which the emission end surface 632 of the angle converter 63 is exposed, and thus can be referred to as the emission port of the fluorescent YL of the fluorescent emission device 4A.

[0271] The opening AP has an inner surface AP1 facing the +Y direction, an inner surface AP2 facing the -Y direction, an inner surface AP3 facing the +X direction, an inner surface AP4 facing the -X direction, and a bottom surface AP5 facing the +Z direction. The inner surfaces AP1 to AP4 and the bottom surface AP5 are constituted by the inner surfaces of the second housing portion 712 and the housing recess 741, respectively.

[0272] Specifically, inner surface AP1 is formed by inner surface 7121, inner surface AP2 is formed by inner surface 742, inner surface AP3 is formed by inner surfaces 7122 and 743, and inner surface AP4 is formed by inner surfaces 7123 and 744. Bottom surface AP5 is formed by inner surface 7124 and a surface of substrate 51 facing the +Z direction.

[0273] A gap GP3 is provided between the accommodated portion 6AP and the inner surface AP1, and a gap GP4 is provided between the accommodated portion 6AP and the inner surface AP2. Gaps GP5 and GP7 are provided between the accommodated portion 6AP and the inner surface AP3, and gaps GP6 and GP8 are provided between the accommodated portion 6AP and the inner surface AP4. Gaps GP1 and GP2 are provided between the accommodated portion 6AP and the bottom surface AP5. Therefore, the accommodated portion 6AP does not contact the inner surfaces AP1 and AP2 along the Y axis, does not contact the inner surfaces AP3 and AP4 along the X axis, and does not contact the bottom surface AP5 along the Z axis.

[0274] Therefore, when the light guide 61 expands or contracts or when an impact acts on the light source device 3A along the X-axis or Y-axis, the accommodated portion 6AP can be prevented from contacting the inner surfaces AP1 to AP4 and the bottom surface AP5 .

[0275] Effects of the First Embodiment

[0276] The projector 1 according to the present embodiment described above provides the following effects.

[0277] The projector 1 includes a light source device 3A, a light modulator 27, and a projection optical device 29. The light modulator 27 corresponds to an image forming device and modulates light emitted from the light source device 3A to form image light. The projection optical device 29 projects the formed image light.

[0278] The light source device 3A includes a substrate 51 , a light guide 61 , an angle converter 63 , a base 71 , and a first cover member 74 .

[0279] The light guide 61 has side surfaces 611 to 614 extending in the +Z direction, and a first end surface 615 and a second end surface 616 that intersect the side surfaces 611 to 614 and are located on opposite sides to each other. The +Z direction corresponds to the first direction.

[0280] The angle converter 63 is bonded to the first end surface 615 . The angle converter 63 converts the angle of light emitted from the first end surface 615 .

[0281] The light guide 61 is arranged on the base 71 .

[0282] A light source 52 that emits light toward the first side surface 611 is mounted on a substrate 51. The substrate 51 is disposed on the side opposite to the base 71 with the light guide 61 interposed therebetween, covers the light guide 61, and is fixed to the base 71.

[0283] A first cover member 74 is fixed to the base 71 and houses the angle converter 63 inside together with the base 71. The first cover member 74 corresponds to the cover member.

[0284] The base 71 has a first storage portion 711 and a second storage portion 712.

[0285] The first storage portion 711 houses the light guide body 61 with the first side surface 611 exposed. The light guide body 61 is fixed to the first storage portion 711.

[0286] The second storage portion 712 houses a stored portion 6AP from the angle converter 63 to a part on the angle converter 63 side in the light guide body 61 together with the first cover member 74.

[0287] The second storage portion 712 and the first cover member 74 surround the stored portion 6AP and form a storage space SP for housing the stored portion 6AP.

[0288] The portion of the light guide body 61 fixed to the first storage portion 711 is the fixed end.

[0289] A part on the angle converter 63 side of the light guide body 61 including the first end surface 615 joined to the angle converter 63 is the free end.

[0290] According to such a structure, the above-mentioned stored portion 6AP is housed in the storage space SP formed by the second storage portion 712 and the first cover member 74. Thereby, it is possible to suppress an external force from acting on the circumferential surface of the angle converter 63 centered on the optical axis Ax of the angle converter 63.

[0291] In addition, a part on the angle converter 63 side of the light guide body 61 is the free end of the light guide body 61. Therefore, even when the light guide body 61 expands or contracts, or when an external force is applied to the angle converter 63 due to dropping or the like, the angle converter 63 is allowed to move and swing within the storage space SP. That is, when the light guide body 61 is displaced due to the expansion or contraction of the light guide body 61 or the action of an external force, the angle converter 63 can follow the displacement of the light guide body 61. Therefore, it is possible to suppress the angle converter 63 from peeling off from the light guide body 61. Therefore, a light source device 3A capable of stably emitting light can be configured, and further, a projector 1 capable of stably emitting image light can be configured.

[0292] In the light source device 3A, the angle conversion body 63 is joined to the first end face 615 by an adhesive 64. The second storage portion 712 that forms the storage space SP and the first cover member 74 allow the angle conversion body 63 to move in the +Z direction due to at least either the expansion or contraction of the adhesive 64.

[0293] In addition to opening in the +Z direction, a gap GP1 is provided between the inner surface 7124 of the second storage portion 712 and the stored portion 6AP. The storage recess 741 of the first cover member 74 that forms the storage space SP together with the second storage portion 712 opens in the +Z direction. Further, the storage recess 741 penetrates the first cover member 74 along the Z axis, and a gap GP2 is provided between the stored portion 6AP and the substrate 51 located in the -Z direction with respect to the first cover member 74. Therefore, the angle conversion body 63 can move in the +Z direction and the -Z direction, respectively.

[0294] Therefore, even when the adhesive 64 expands or contracts due to heat and the angle conversion body 63 moves in the +Z direction, the movement of the angle conversion body 63 in the +Z direction is not obstructed by the second storage portion 712 and the first cover member 74. Thereby, it is possible to suppress the application of a load to the joint portion between the angle conversion body 63 and the light guide body 61. Therefore, it is possible to suppress the peeling of the angle conversion body 63 from the light guide body 61.

[0295] The light source device 3A includes a holding member 65.

[0296] The holding member 65 includes a first holding portion 661 and a second holding portion 671 that hold the side faces 611 to 614, and a first fixing portion 662 and a second fixing portion 672 that are fixed to the angle conversion body 63. The holding member 65 is disposed across the joint portion between the light guide body 61 and the angle conversion body 63. The holding member 65 is disposed in the storage space SP.

[0297] According to such a structure, the joint portion between the light guide body 61 and the angle conversion body 63 can be protected by the holding member 65 disposed as described above. Thereby, even when an external force is applied to the angle conversion body 63, it is possible to suppress the peeling of the angle conversion body 63 from the light guide body 61. Therefore, it is possible to configure the light source device 3A that can stably emit light.

[0298] In the light source device 3A, the first cover member 74 has inner surfaces 742 to 744 that form the storage space SP. The inner surfaces 742 to 744 correspond to the first inner surface. The second storage portion 712 has inner surfaces 7121 to 7124 that form the storage space SP. The inner surfaces 7121 to 7124 correspond to the second inner surface. The holding member 65 does not contact the inner surfaces 7121 to 7124 and 742 to 744.

[0299] According to such a structure, not only when the holding member 65 moves along the +Z direction due to the expansion or contraction caused by temperature change, but also when the holding member 65 swings in a direction intersecting the +Z direction due to an external force acting on the light source device 3A, it is possible to suppress the collision between the holding member 65 and the inner surfaces 7121 - 7124, 742 - 744. Therefore, it is possible to suppress the breakage of the joint portion between the light guide 61 and the angle conversion member 63, and it is possible to effectively suppress the peeling of the angle conversion member 63 from the light guide 61.

[0300] The light source device 3A includes a reflection element 62 and a biasing member 73.

[0301] The reflection element 62 is disposed on the second end face 616. The reflection element 62 reflects the light emitted from the second end face 616 toward the light guide 61.

[0302] The biasing member 73 is fixed to the base 71 and biases the reflection element 62 toward the second end face 616. Here, when the second end face 616 is fixed, when the light guide 61 expands or contracts due to heat or the like, the position of the first end face 615 in the +Z direction is likely to move.

[0303] In contrast, according to the above structure, even when the light guide 61 expands or contracts, by the elongation or contraction of the biasing member 73, it is possible to reduce the amount of movement of the first end face 615 in the +Z direction. Therefore, it is possible to suppress the breakage of the joint portion between the light guide 61 and the angle conversion member 63, and it is possible to effectively suppress the peeling of the angle conversion member 63 from the light guide 61.

[0304] In the light source device 3A, the base 71 and the first cover member 74 each have heat dissipation properties. According to such a structure, it is possible to easily dissipate the heat transferred from the light guide 61 and the angle conversion member 63 to the outside of the light source device 3A through the base 71 and the first cover member 74. Therefore, the light source device 3A can easily and stably emit light.

[0305] In the light source device 3A, the area of the cross section of the light guide 61 orthogonal to the +Z direction is 0.25 mm 2 or more and 4.00 mm 2 or less.

[0306] Here, since the angle conversion member 63 is joined to the first end face 615, if the cross-sectional area of the light guide 61 is small, the angle conversion member 63 is likely to peel off from the light guide 61.

[0307] In contrast, the second housing portion 712 and the first cover member 74 that form the housing space SP for housing the housed portion 6AP hardly come into contact with the angle conversion member 63. Therefore, it is possible to effectively suppress the peeling of the angle conversion member 63 from the thin light guide 61.

[0308] In the light source device 3A, the light source 52 outputs excitation light EL. The light guide 61 emits converted light, i.e., fluorescence YL, obtained by converting the wavelength of the incident excitation light EL.

[0309] According to such a structure, the light guide 61 can convert the wavelength of the excitation light EL emitted from the light source 52 and emit fluorescence YL. Here, since the light guide 61 extends in the +Z direction, the optical path of the incident excitation light EL traveling in the light guide 61 can be extended. Therefore, the conversion efficiency of the light guide 61 from the excitation light EL to the fluorescence YL can be improved.

[0310] Alternatively, the light source device 3A includes a substrate 51, a light guide 61, an angle converter 63, a holder 65, a base 71, and a first cover member 74.

[0311] The light guide 61 has side surfaces 611 to 614 extending in the +Z direction and a first end surface 615 intersecting the side surfaces 611 to 614. The +Z direction corresponds to the first direction.

[0312] The angle converter 63 is joined to the first end surface 615. The angle converter 63 converts the angle of the light emitted from the first end surface 615.

[0313] The holder 65 has holding portions 661, 671 for holding the side surfaces 611 to 614 and fixing portions 662, 672 fixed to the angle converter 63. The holder 65 is arranged across the joint portion between the light guide 61 and the angle converter 63.

[0314] The light guide 61 is arranged on the base 71.

[0315] The light source 52 that emits light toward the first side surface 611 is mounted on the substrate 51. The substrate 51 is arranged on the side opposite to the base 71 with the light guide 61 interposed therebetween and is fixed to the base 71. The first cover member 74 has inner surfaces 742 to 744 that together with the base 71 form a storage space SP, and the storage space SP stores a stored portion 6AP including the holder 65 from the angle converter 63 to the end portion on the angle converter 63 side of the light guide 61. The first cover member 74 is arranged on the side opposite to the base 71 with the angle converter 63 interposed therebetween and is fixed to the base 71. In addition, the inner surfaces 742 to 744 correspond to the first inner surfaces.

[0316] The base 71 has a first storage portion 711 and a second storage portion 712.

[0317] The light guide 61 is fixed to the first storage part 711 in a state where the first side surface 611 is exposed. The second storage part 712 has inner surfaces 7121 to 7124 that together with the first cover member 74 form a storage space SP. The inner surfaces 7121 to 7124 correspond to the second inner surface. The second storage part 712 stores the stored part 6AP together with the first cover member 74 in the storage space SP.

[0318] The part of the light guide 61 fixed to the first storage part 711 is the fixed end.

[0319] A part of the light guide 61 on the side of the angular conversion body 63 including the first end surface 615 joined to the angular conversion body 63 is the free end.

[0320] The holding member 65 is not in contact with the inner surfaces 7121 to 7124 and 742 to 744 respectively.

[0321] According to such a structure, as described above, the joint portion between the light guide 61 and the angular conversion body 63 can be protected by the holding member 65. Thus, even if an external force is applied to the angular conversion body 63, peeling of the angular conversion body 63 from the light guide 61 can be suppressed.

[0322] In addition, the stored part 6AP including the holding member 65 is stored in the storage space SP formed by the second storage part 712 and the first cover member 74. Thus, an external force acting on the peripheral surface of the holding member 65 centered on the optical axis Ax of the angular conversion body 63 can be suppressed.

[0323] And, in the light guide 61, a part on the side of the angular conversion body 63 is the free end in the light guide, and the holding member 65 is not in contact with the inner surfaces 7121 to 7124 and 742 to 744 that form the storage space. Therefore, when the light guide 61 expands or contracts or an external force is applied to the holding member 65 due to dropping or the like, even if the holding member 65 moves or swings within the storage space SP, the holding member 65 does not come into contact with the inner surfaces 7121 to 7124 and 742 to 744. Thus, an external force acting on the holding member 65 due to contact between the holding member 65 and the second storage part 712 and the first cover member 74 can be suppressed, and peeling of the angular conversion body 63 from the light guide 61 can be suppressed.

[0324] Therefore, a light source device 3A that can stably emit light can be configured.

[0325] Alternatively, the light source device 3A includes a substrate 51, a light source 52, a light emitting member 6A, a base 71, and a first cover member 74.

[0326] The light emitting member 6A extends in the +Z direction and emits light in the +Z direction. The +Z direction corresponds to the first direction.

[0327] The light emitting component 6A is disposed on the base 71.

[0328] The light source 52 emits light that is incident on the light emitting component 6A in the -Y direction intersecting the +Z direction. The -Y direction corresponds to the second direction.

[0329] The light source 52 is mounted on the substrate 51. The substrate 51 is disposed on the side opposite to the base 71 with the light emitting component 6A interposed therebetween in the -Y direction, and covers the -Z direction portion of the light emitting component 6A.

[0330] The first cover member 74 is disposed on the side opposite to the base 71 with the light emitting component 6A interposed therebetween.

[0331] The light emitting component 6A includes a light guide 61, an angle conversion member 63, and a holder 65.

[0332] The light guide 61 has side surfaces 611 to 614 that extend in the +Z direction and include the first side surface 611 into which the light emitted from the light source 52 is incident; and a first end surface 615 that is located in the +Z direction and intersects the side surfaces 611 to 614. The first end surface 615 corresponds to the end surface.

[0333] The angle conversion member 63 is joined to the first end surface 615 and converts the angle of the light emitted from the first end surface 615.

[0334] The holder 65 has holding portions 661 and 671 that hold the side surfaces 611 to 614 and fixing portions 662 and 672 that are fixed to the angle conversion member 63. The holder 65 is disposed across the joining portion of the light guide 61 and the angle conversion member 63.

[0335] The base has a first receiving portion 711 and a second receiving portion 712.

[0336] The light guide 61 is fixed to the first receiving portion 711 in a state where the first side surface 611 is exposed. The second receiving portion 712 is provided in the +Z direction with respect to the first receiving portion 711. The second receiving portion 712 and the first cover member 74 together form a receiving space SP that receives a received portion 6AP including the holder 65 from the angle conversion member 63 in the light emitting component 6A to the +Z direction portion in the light guide 61.

[0337] The received portion 6AP does not contact the inner surface of the receiving space SP.

[0338] According to such a structure, similarly to the above, it is possible to suppress the angle conversion member 63 from peeling off from the light guide 61, and a light source device 3A that can stably emit light can be configured.

[0339] Second Embodiment

[0340] Next, a second embodiment of the present disclosure will be described.

[0341] The projector of this embodiment has the same structure as the projector 1 of the first embodiment, except that the holder of the light-emitting member constituting the light source device has fins. In addition, in the following description, the same or substantially the same parts as those already described are denoted by the same reference numerals and the description thereof is omitted.

[0342] Schematic structure of the projector and the light source device

[0343] Figure 24 FIG. is a perspective view showing a part of the light-emitting member 6B of the light source device 3A included in the projector of this embodiment.

[0344] The projector of this embodiment has the same structure and function as the projector 1 of the first embodiment, except that it has a light-emitting member 6B, a part of which is shown in Figure 24 , instead of the light-emitting member 6A. That is, the light source device 3A of this embodiment has a light-emitting member 6B instead of the light-emitting member 6A.

[0345] Structure of the light-emitting member

[0346] The light-emitting member 6B has the same structure and function as the light-emitting member 6A of the first embodiment, except that it has a holder 65B instead of the holder 65.

[0347] The holder 65B includes a first holding member 66B and a second holding member 67B in the same manner as the holder 65, and the holding members 66B and 67B are joined to each other by an adhesive 68 to form a structure.

[0348] The first holding member 66B has the same structure and function as the first holding member 66, except that it further has a plurality of fins 666.

[0349] The plurality of fins 666 protrude from the outer surface 66B1 facing the -X direction toward the -X direction in the first holding member 66B and are arranged along the Z axis. Alternatively, the plurality of fins 666 may be arranged along the Y axis. Alternatively, the plurality of fins 666 may protrude from the outer surface 66B2 facing the +Y direction toward the +Y direction in the first holding member 66B, or may be provided on the outer surfaces 66B1 and 66B2, respectively.

[0350] The second holding member 67B has the same structure and function as the second holding member 67, except that it further has a plurality of fins 676.

[0351] The plurality of fins 676 protrude in the +X direction from an outer surface 67B1 of the second holding member 67B, which faces the +X direction, and are arranged along the Z axis. Alternatively, the plurality of fins 676 may be arranged along the Y axis. Alternatively, the plurality of fins 676 may protrude in the -Y direction from an outer surface 67B2 of the second holding member 67B, which faces the -Y direction, or may be provided separately on the outer surfaces 67B1 and 67B2.

[0352] Effects of the Second Embodiment

[0353] The projector according to the present embodiment described above has the following effects in addition to the same effects as those of the projector 1 according to the first embodiment.

[0354] In the light source device 3A of the present embodiment, the holder 65B has a plurality of fins 666 and 676 .

[0355] According to such a configuration, the heat transferred from the light guide 61 and the angle converter 63 can be easily dissipated to the outside of the holder 65B. Therefore, the temperature increase of the light guide 61 and the angle converter 63 can be suppressed.

[0356] Third embodiment

[0357] Next, a third embodiment of the present disclosure will be described.

[0358] The projector of this embodiment has the same structure as the projector 1 involved in the first embodiment, but the structures of the first holding member and the second holding member connecting the holding member are different. In addition, in the following description, the same or substantially the same parts as those already described are marked with the same reference numerals and the description thereof is omitted.

[0359] Schematic structure of projector and light source device

[0360] Figure 25 It is an exploded perspective view showing a part of the light emitting member 6C constituting the light source device 3A included in the projector according to the present embodiment.

[0361] The projector of this embodiment has a light emitting member 6A in place of the light emitting member 6A. Figure 25 , the projector 1 has the same structure and function as the projector 1 of the first embodiment, except for the light emitting member 6C, a portion of which is shown in FIG. That is, the light source device 3A of the present embodiment includes the light emitting member 6C instead of the light emitting member 6A.

[0362] Structure of the light emitting component

[0363] The light emitting member 6C has the same structure and function as the light emitting member 6A of the first embodiment, except that it includes a holder 65C and a fixing member 69C instead of the holder 65 .

[0364] The holding member 65C includes a first holding member 66C and a second holding member 67C in the same manner as the holding member 65, and the holding members 66C and 67C are configured to be connected by a fixing member 69C. In addition, the holding member 65C has a first connecting portion 65C1 and a second connecting portion 65C2, instead of the first connecting portion 651 and the second connecting portion 652 formed by the adhesive 68.

[0365] The first holding member 66C has the same structure and function as the first holding member 66, except that it has a through hole 66C3 opening on the outer surface 66C1 facing the -X direction and a locking portion 66C4 provided on the outer surface 66C2 facing the +Y direction. Additionally, the first holding member 66C may have a plurality of fins 666.

[0366] The through hole 66C3 opens on the outer surface 66C1 and the second connecting region 6642. The fixing member 69C passes through the through hole 66C3. The through hole 663C constitutes the first connecting portion 65C1.

[0367] The locking portion 66C4 opens on the outer surface 66C2 and the first connecting region 6641. The locking portion 66C4 locks the fixing member 69C that has passed through the through hole 67C3 described below. In the present embodiment, the locking portion 66C4 is a threaded hole and constitutes the second connecting portion 65C2.

[0368] The second holding member 67C has the same structure and function as the second holding member 67, except that it has a through hole 67C3 opening on the outer surface 67C1 facing the +X direction and a locking portion 67C4 provided on the outer surface 67C2 facing the +Y direction. Additionally, the second holding member 67C may have a plurality of fins 676.

[0369] The through hole 67C3 opens on the outer surface 67C1 and the third connecting region 6741. The fixing member 69C passes through the through hole 67C3. The through hole 67C3 constitutes the second connecting portion 65C2. When the first holding member 66C and the second holding member 67C are combined, the central axis of the through hole 67C3 is substantially aligned with the central axis of the locking portion 66C4.

[0370] The locking portion 67C4 opens on the outer surface 67C2 and the fourth connecting region 6742. The locking portion 67C4 locks the fixing member 69C that has passed through the through hole 66C3. In the present embodiment, the locking portion 67C4 is a threaded hole and constitutes the first connecting portion 65C1. When the first holding member 66C and the second holding member 67C are combined, the central axis of the locking portion 67C4 is substantially aligned with the central axis of the through hole 66C3.

[0371] The fixing member 69C is composed of two screws 69C1 and 69C2.

[0372] Figure 26 Fig. is a perspective view showing the holding member 65C formed by combining the first holding member 66C and the second holding member 67C.

[0373] When connecting the first holding member 66C and the second holding member 67C, as Figure 26 shown, with the first connection area 6641 in contact with the third connection area 6741 and the second connection area 6642 in contact with the fourth connection area 6742, the screw 69C1 is inserted into the through-hole 66C3 of the first holding member 66C from the outer surface 66C1 side in such a way that it is located in the -Y direction as it goes in the +X direction, and then the end portion of the screw 69C1 is locked to the locking portion 67C4 of the second holding member 67C. Similarly, after inserting the screw 69C2 into the through-hole 67C3 of the second holding member 67C from the outer surface 67C1 side in such a way that it is located in the +Y direction as it goes in the -X direction, the end portion of the screw 69C2 is locked to the locking portion 66C4 of the first holding member 66C. Thus, the first holding member 66C and the second holding member 67C are connected, and the holding member 65C holds the light guide 61.

[0374] Effects of the Third Embodiment

[0375] The projector of the present embodiment described above has the same effects as the projector 1 of the first embodiment, and also has the following effects.

[0376] The light source device 3A of the present embodiment has a fixing member 69C for fixing the first holding member 66C and the second holding member 67C. The holding member 65C has a first connection portion 65C1 and a second connection portion 65C2. The first connection portion 65C1 and the second connection portion 65C2 are equivalent to connection portions.

[0377] The first connection portion 65C1 has a through-hole 66C3 and a locking portion 67C4.

[0378] The through-hole 66C3 is provided in the first holding member 66C among the first holding member 66C and the second holding member 67C. The screw 69C1 in the fixing member 69C passes through the through-hole 66C3.

[0379] The locking portion 67C4 is provided in the second holding member 67C among the first holding member 66C and the second holding member 67C. The locking portion 67C4 locks the screw 69C1 that has passed through the through-hole 66C3.

[0380] The second connection portion 65C2 has a through-hole 67C3 and a locking portion 66C4.

[0381] The through hole 67C3 is provided in the second holding member 67C of the first holding member 66C and the second holding member 67C. The screw 69C2 of the fixing member 69C passes through the through hole 67C3.

[0382] The locking portion 66C4 is provided on the first holding member 66C of the first holding member 66C and the second holding member 67C. The locking portion 66C4 locks the screw 69C2 that has passed through the through-hole 67C3.

[0383] This structure allows the first holding member 66C and the second holding member 67C to be securely and easily fixed. Therefore, the light guide 61 and the angle converter 63 can be securely and easily fixed by the holder 65C, effectively preventing the angle converter 63 from being separated from the light guide 61.

[0384] Fourth embodiment

[0385] Next, a fourth embodiment of the present disclosure will be described.

[0386] The projector of this embodiment has the same structure as the projector 1 involved in the first embodiment, but the structures of the first holding member and the second holding member connecting the holding member are different. In addition, in the following description, the same or substantially the same parts as those already described are marked with the same reference numerals and the description thereof is omitted.

[0387] Schematic structure of projector and light source device

[0388] Figure 27 This is a diagram showing a light emitting member 6D constituting a light source device 3A included in the projector according to the present embodiment, as viewed from the +Z direction.

[0389] The projector of this embodiment has a light emitting member 6A in place of the light emitting member 6A. Figure 27 Except for the light emitting member 6D shown, the projector 1 has the same structure and function as the projector 1 of the first embodiment. That is, the light source device 3A of the present embodiment includes the light emitting member 6D instead of the light emitting member 6A.

[0390] Structure of the light emitting component

[0391] The light emitting member 6D has the same structure and function as the light emitting member 6A of the first embodiment, except that it includes a holder 65D and a fixing member 69D instead of the holder 65 .

[0392] The holding member 65D, like the holding member 65, includes a first holding part 66 and a second holding part 67. Additionally, the holding member 65D may or may not include a first connecting part 651 and a second connecting part 652 formed by an adhesive 68 disposed between the first connecting surface 664 and the second connecting surface 674.

[0393] The fixing member 69D is an elastic member that clamps the holding member 65D to fix the holding member 65D to the light guide 61. Specifically, the fixing member 69D is a leaf spring. The fixing member 69D has a first pressing piece 69D1, a second pressing piece 69D2, and a connecting piece 69D3.

[0394] The first pressing piece 69D1 contacts the outer surface F11 facing the -X direction and the outer surface F12 facing the +Y direction of the first holding part 66, and presses the first holding part 66 toward the second holding part 67.

[0395] The second pressing piece 69D2 contacts the outer surface F21 facing the +X direction and the outer surface F22 facing the -Y direction of the second holding part 67, and presses the second holding part 67 toward the first holding part 66.

[0396] The connecting piece 69D3 connects the first pressing piece 69D1 and the second pressing piece 69D2.

[0397] Through such a fixing member 69D, the first holding part 66 and the second holding part 67 are pressed toward each other, so the state in which the first holding part 66 and the second holding part 67 are connected is maintained.

[0398] Effects of the Fourth Embodiment

[0399] The projector of the present embodiment described above has the following effects in addition to achieving the same effects as the projector 1 of the first embodiment.

[0400] The light source device 3A of the present embodiment has a fixing member 69D that clamps the holding member 65D to fix the holding member 65D to the light guide 61.

[0401] The holding member 65D includes a first holding part 66 and a second holding part 67. The first holding part 66 has a first holding portion 661, a first fixing portion 662, and a first connecting surface 664. The second holding part 67 has a second holding portion 671, a second fixing portion 672, and a second connecting surface 674.

[0402] The fixing member 69D, which is an elastic member, has a first pressing piece 69D1, a second pressing piece 69D2, and a connecting piece 69D3.

[0403] The first pressing piece 69D1 presses the first holding member 66 toward the second holding member 67. The second pressing piece 69D2 presses the second holding member 67 toward the first holding member 66. The connecting piece 69D3 connects the first pressing piece 69D1 and the second pressing piece 69D2.

[0404] According to such a structure, in addition to being able to easily mount the fixing member 69D on the holding member 65D, it is also possible to easily clamp the first holding member 66 and the second holding member 67. Therefore, it is possible to easily mount the holding member 65D on the light guide 61 and the angle conversion member 63, and it is possible to easily prevent the angle conversion member 63 from peeling off from the light guide 61.

[0405] In addition, the first pressing piece 69D1 may sandwich the outer surface F12 of the first holding member 66 and the outer surface F21 of the second holding member 67, and press the first holding member 66 and the second holding member 67 toward each other.

[0406] Alternatively, the second pressing piece 69D2 may sandwich the outer surface F11 of the first holding member 66 and the outer surface F22 of the second holding member 67, and press the first holding member 66 and the second holding member 67 toward each other.

[0407] Fifth Embodiment

[0408] Next, a fifth embodiment of the present disclosure will be described.

[0409] The projector of this embodiment has the same structure as the projector 1 of the first embodiment, but the contact state between the holding member and the light guide is different. In addition, in the following description, the same reference numerals are assigned to the same or substantially the same parts as those already described, and the description thereof is omitted.

[0410] Schematic Structure of Projector and Light Source Device

[0411] Figure 28 FIG. is a view showing an enlarged cross-section of a part of the light-emitting member 6E of the light source device 3A included in the projector of this embodiment along the YZ plane.

[0412] The projector of this embodiment has the same structure and function as the projector 1 of the first embodiment, except that it has a light-emitting member 6E, a part of which is shown in Figure 28 , instead of the light-emitting member 6A. That is, the light source device 3A of this embodiment has a light-emitting member 6E instead of the light-emitting member 6A.

[0413] Structure of Light-Emitting Member

[0414] The light-emitting component 6E has the same structure and function as the light-emitting component 6A of the first embodiment, except that it has a holding member 65E instead of the holding member 65. The holding member 65E includes a first holding member 66E and a second holding member 67E.

[0415] The first holding member 66E has the same structure and function as any one of the first holding members 66, 66B, and 66C of the first, second, and third embodiments.

[0416] Here, a plurality of recesses 6613 are provided in the first contact portion 6611 of the first holding portion 661 of the first holding member 66E. Therefore, the first contact portion 6611 makes point contact with the first side surface 611 of the light guide 61 at a plurality of positions along the +Z direction of the first contact portion 6611.

[0417] In addition, although not shown, a plurality of the same recesses 6613 are also provided in the second contact portion 6612 of the first holding portion 661 of the first holding member 66E. Therefore, the second contact portion 6612 makes point contact with the second side surface 612 of the light guide 61 at a plurality of positions along the +Z direction of the second contact portion 6612.

[0418] The second holding member 67E has the same structure and function as any one of the second holding members 67, 67B, and 67C of the first, second, and third embodiments.

[0419] Here, a plurality of recesses 6713 are provided in the third contact portion 6711 of the second holding portion 671 of the second holding member 67E. Therefore, the third contact portion 6711 makes point contact with the third side surface 613 of the light guide 61 at a plurality of positions along the +Z direction of the third contact portion 6711.

[0420] In addition, although not shown, a plurality of the same recesses 6713 are also provided in the fourth contact portion 6712 of the second holding portion 671 of the second holding member 67E. Therefore, the fourth contact portion 6712 makes point contact with the fourth side surface 614 of the light guide 61 at a plurality of positions along the +Z direction in the fourth contact portion 6712.

[0421] Effects of the Fifth Embodiment

[0422] The projector of the present embodiment described above has the following effects in addition to achieving the same effects as the projector 1 of the first embodiment.

[0423] In the light source device 3A of the present embodiment, the contact between at least one of the first holding part 661 and the second holding part 671 and the light guide 61 is point contact at a plurality of positions along the +Z direction. In the present embodiment, the contact between the first contact part 6611 of the first holding part 661 and the first side surface 611 of the light guide 61 and the contact between the second contact part 6612 of the first holding part 661 and the second side surface 61 of the light guide 61 are respectively point contact at a plurality of positions along the +Z direction. Similarly, the contact between the third contact part 6711 of the second holding part 671 and the third side surface 613 of the light guide 61 and the contact between the fourth contact part 6712 of the second holding part 671 and the fourth side surface 614 of the light guide 61 are respectively point contact at a plurality of positions along the +Z direction.

[0424] Here, at the portion of the side surface of the light guide 61 that contacts other components, compared with the portion that contacts air, the critical angle when the light traveling in the light guide 61 undergoes internal reflection is likely to become smaller, and the light is likely to leak to the outside of the light guide 61.

[0425] In response to this, according to the above structure, it is possible to reduce the contact area of each of the first holding part 661 and the second holding part 671 with respect to the light guide 61. As a result, it is possible to suppress light leakage from the contact portions between the light guide 61 and the first holding part 661 and the second holding part 671.

[0426] Sixth Embodiment

[0427] Next, a sixth embodiment of the present disclosure will be described.

[0428] The projector of the present embodiment has the same structure as the projector 1 of the first embodiment, except that the light emitting component constituting the light source device does not have a holding member. In addition, in the following description, the same or substantially the same parts as those already described are denoted by the same reference numerals and the description thereof is omitted.

[0429] Schematic Structures of Projector and Light Source Device

[0430] Figure 29 It is a diagram showing a part of a cross section along the YZ plane of the light source device 3F included in the projector of the present embodiment.

[0431] The projector of the present embodiment has, in place of the light source device 3A, Figure 29 the light source device 3F shown, and has the same structure and function as the projector 1 of the first embodiment. The light source device 3F has the same structure and function as the light source device 3A of the first embodiment, except that it has a light emitting component 6F in place of the light emitting component 6A. That is, the light source device 3F includes a light source unit 5, a light emitting component 6F, and a housing 7.

[0432] Structure of the light emitting component

[0433] The light emitting component 6F has the same structure and functions as the light emitting component 6A of the first embodiment, except that it does not have the holding member 65. That is, the light emitting component 6F has a light guide 61, a reflection element 62, an angle conversion body 63, and an adhesive 64. A part of the light guide 61 on the side of the angle conversion body 63 including the first end face 615, the angle conversion body 63, and the adhesive 64 constitute a received part 6FP received in a receiving space SP formed by the second receiving part 712 of the base 71 and the first cover member 74. In addition, the received part 6FP is the free end of the light emitting component 6F.

[0434] Although detailed illustrations are omitted, gaps are provided between the received part 6FP and the inner surfaces 7121-7124 of the second receiving part 712 constituting the receiving space SP. In addition, gaps are provided between the received part 6FP and the inner surfaces 742-744 of the receiving recess 741 constituting the receiving space SP. That is, the received part 6FP does not contact the inner surface of the receiving space SP formed by the second receiving part 712 and the receiving recess 741.

[0435] Therefore, when the light guide 61 expands or contracts, and when an impact acts on the light source device 3F along the X-axis or Y-axis, it is possible to prevent the received part 6FP from contacting the inner surface of the receiving space SP and the angle conversion body 63 from peeling off from the light guide 61.

[0436] Effect of the sixth embodiment

[0437] The projector of the present embodiment described above has the same effect as the projector 1 of the first embodiment.

[0438] That is, the light source device 3F has a substrate 51, a light guide 61, an angle conversion body 63, a base 71, and a first cover member 74.

[0439] The light guide 61 has side surfaces 611-614 extending in the +Z direction and a first end face 615 intersecting the side surfaces 611-614. The +Z direction corresponds to the first direction.

[0440] The angle conversion body 63 is joined to the first end face 615. The angle conversion body 63 converts the angle of the light emitted from the first end face 615.

[0441] The light guide 61 is disposed on the base.

[0442] A light source 52 that emits light toward the first side surface 611 is mounted on the substrate 51. The substrate 51 is disposed on the side opposite to the base 71 with the light guide 61 interposed therebetween, and is fixed to the base 71.

[0443] The first cover member 74 has inner surfaces 742 to 744 that, together with the base 71, form a storage space SP for storing a stored portion 6AP at the end on the side of the angle converter 63 from the angle converter 63 to the light guide 61. The inner surfaces 742 to 744 correspond to the first inner surface. The first cover member 74 is disposed on the side opposite to the base 71 with the angle converter 63 interposed therebetween and is fixed to the base 71.

[0444] The base 71 has a first storage portion 711 and a second storage portion 712.

[0445] The light guide 61 is fixed to the first storage portion 711 in a state where the first side surface 611 is exposed. The second storage portion 712 has inner surfaces 7121 to 7124 that, together with the first cover member 74, form a storage space SP. The inner surfaces 7121 to 7124 correspond to the second inner surface. The second storage portion 712 and the first cover member 74 together store the stored portion 6AP in the storage space SP.

[0446] The portion of the light guide 61 fixed to the first storage portion 711 is the fixed end.

[0447] A part on the side of the angle converter 63 of the light guide 61 including the first end surface 615 joined to the angle converter 63 is the free end.

[0448] Since the holding member 65 does not contact the inner surfaces 7121 to 7124 and 742 to 744, the angle converter 63 further away from the inner surfaces 7121 to 7124 and 742 to 744 does not contact the inner surfaces 7121 to 7124 and 742 to 744.

[0449] With such a structure, similarly to the above, it is possible to suppress an external force from acting on the circumferential surface of the angle converter 63 centered on the optical axis Ax of the angle converter 63.

[0450] In addition, in the light guide 61, a part on the side of the angle converter 63 is the free end of the light guide 61, and the angle converter 63 does not contact the inner surfaces 7121 to 7124 and 742 to 744. Therefore, when the light guide 61 expands or contracts or an external force is applied to the angle converter 63 due to dropping or the like, even if the angle converter 63 moves or swings within the storage space SP, the angle converter 63 does not contact the inner surfaces 7121 to 7124 and 742 to 744. Thus, it is possible to suppress a situation where an external force such as contact between the angle converter 63 and the second storage portion 712 and the first cover member 74 acts on the angle converter 63, and it is possible to suppress the angle converter 63 from peeling off from the light guide 61. Therefore, it is possible to configure a light source device 3F that can stably emit light.

[0451] Alternatively, the light source device 3F includes a substrate 51, a light source 52, a light emitting member 6F, a base 71, and a first cover member 74.

[0452] The light emitting member 6F extends in the +Z direction and emits light in the +Z direction. The +Z direction corresponds to the first direction.

[0453] The light emitting member 6F is disposed on the base 71.

[0454] The light source 52 emits light that is incident on the light emitting member 6F along the -Y direction intersecting the +Z direction. The -Y direction corresponds to the second direction.

[0455] The light source 52 is mounted on the substrate 51. The substrate 51 is disposed on the side opposite to the base 71 with the light emitting member 6F interposed therebetween in the -Y direction, and covers a portion of the light emitting member 6F in the direction opposite to the -Y direction. That is, the substrate 51 covers the +Y direction portion of the light emitting member 6F.

[0456] The first cover member 74 corresponds to a cover member. The first cover member 74 is disposed on the side opposite to the base 71 with the light emitting member 6F interposed therebetween.

[0457] The light emitting member 6F includes a light guide 61 and an angle converter 63.

[0458] The light guide 61 has: a first side surface 611 that extends in the +Z direction and to which the light emitted from the light source 52 is incident; and a first end surface 615 that is located in the +Z direction and intersects the first side surface 611. The first side surface 611 corresponds to a side surface, and the first end surface 615 corresponds to an end surface.

[0459] The angle converter 63 is joined to the first end surface 615 and converts the angle of the light emitted from the first end surface 615.

[0460] The base 71 has a first storage portion 711 and a second storage portion 712.

[0461] The light guide 61 is fixed to the first storage portion 711 with the first side surface 611 exposed. The second storage portion 712 is provided in the +Z direction with respect to the first storage portion 711. The second storage portion 712 and the first cover member 74 together form a storage space SP that stores a stored portion 6FP of the light emitting member 6F from the angle converter 63 to the portion of the light guide 61 in the +Z direction.

[0462] The stored portion 6FP does not contact the inner surface of the storage space SP.

[0463] With such a structure, it is possible to suppress the angle conversion body 63 from contacting the inner surface of the storage space SP and the angle conversion body 63 from peeling off from the light guide body 61, and a light source device 3F capable of stably emitting light can be constituted.

[0464] Modifications of the Embodiment

[0465] The present disclosure is not limited to the above-described embodiments, and modifications, improvements, etc. within the range capable of achieving the object of the present disclosure are included in the present disclosure.

[0466] In the above-described embodiments, the projector has three light modulation devices 27. However, the present disclosure is not limited thereto, and the present disclosure can also be applied to projectors having two or less or four or more light modulation devices.

[0467] In the above-described embodiments, the light guide body 61 is a wavelength conversion body containing a phosphor excited by incident excitation light. However, the present disclosure is not limited thereto, and the light guide body 61 may emit light without converting optical characteristics such as the wavelength of the incident light. In addition, the light guide body 61 may convert optical characteristics other than the wavelength of the incident light.

[0468] In the above-described embodiments, the holders 65, 65B, 65C, 65D, 65E include the first holding members 66, 66B, 66C, 66E and the second holding members 67, 67B, 67C, 67E. However, the present disclosure is not limited thereto, and the holder may be an integral member. In this case, the light guide body 61 joined to the angle conversion body 63 may be inserted into the holder along the Z axis, and the respective holding portions 661, 671 may be brought into contact with the side surfaces 611 to 614 of the light guide body 61.

[0469] In the above-described embodiments, the holder 65 has adhesive avoiding portions 653, 654. However, the present disclosure is not limited thereto, and the adhesive avoiding portions 653, 654 may be absent. The same applies to the other holders 65, 65B, 65D, 65E.

[0470] In the above-described embodiments, the area of the cross section of the light guide body 61 orthogonal to the +Z direction is 0.25 mm 2 or more and 4.00 mm 2 or less. However, the present disclosure is not limited thereto, and the area of the cross section of the light guide body 61 orthogonal to the +Z direction may be less than 0.25 mm 2 or may be greater than 4.00 mm 2 .

[0471] In the above-described embodiments, the light guide 61 has side surfaces 611 to 614 that intersect the first end surface 615 and the second end surface 616, and the excitation light EL is incident on the first side surface 611. However, the present invention is not limited to this. When the first end surface 615 is set as the light emitting surface, other side surfaces or the second end surface may also include an incident region where light is incident.

[0472] In the above-described embodiments, the base 71 of the housing 7 and the first cover member 74 are separate, and the first cover member 74 is fixed to the base 71. However, the present invention is not limited to this. The housing 7 may also have a base 71 integrated with the first cover member 74.

[0473] In the above-described embodiments, the light modulation device 27 has a transmissive liquid crystal panel with different light incident surfaces and light emitting surfaces. However, the present invention is not limited to this. The light modulation device may also have a reflective liquid crystal panel with the same light incident surface and light emitting surface. In addition, as long as it is a light modulation device that can modulate an incident light beam to form an image corresponding to image information, a device using a micromirror, such as a DMD (Digital Micromirror Device), or other light modulation devices other than liquid crystals may also be used.

[0474] In the above-described embodiments, examples of applying the light source devices 3A and 3F of the present disclosure to a projector are given. However, the light source device of the present disclosure may also be used for lighting fixtures, headlamps of automobiles, and the like.

[0475] Summary of the present disclosure

[0476] Hereinafter, the summary of the present disclosure is noted.

[0477] Note 1

[0478] A light source device, characterized by comprising: a light guide body having a side surface extending in a first direction, and a first end surface and a second end surface located on opposite sides of each other and intersecting with the side surface; an angle conversion body joined to the first end surface for converting the angle of light emitted from the first end surface; a base on which the light guide body is disposed; a substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on the side opposite to the base with the light guide body interposed therebetween to cover the light guide body and fixed to the base; and a cover member fixed to the base and together with the base accommodating the angle conversion body therein. The base has: a first accommodating portion that accommodates the light guide body with the side surface exposed, and the light guide body is fixed to the first accommodating portion; and a second accommodating portion that, together with the cover member, accommodates a received portion from the angle conversion body to a part of the light guide body on the angle conversion body side, and the second accommodating portion and the cover member surround the periphery of the received portion to form an accommodating space for accommodating the received portion. The portion of the light guide body fixed to the first accommodating portion is a fixed end, and a part of the light guide body on the angle conversion body side including the first end surface joined to the angle conversion body is a free end.

[0479] According to such a structure, a received portion from the angle conversion body to a part of the light guide body on the angle conversion body side is accommodated in the accommodating space formed by the second accommodating portion and the cover member. Thereby, an external force acting on the circumferential surface of the angle conversion body centered on the optical axis can be suppressed.

[0480] In addition, in the light guide body, a part on the angle conversion body side is a free end of the light guide body. Therefore, even when the light guide body expands or contracts, or an external force is applied to the angle conversion body due to dropping or the like, movement and swinging of the angle conversion body within the accommodating space are permitted. That is, when the light guide body is displaced due to expansion or contraction of the light guide body or the action of an external force, the angle conversion body can follow the displacement of the light guide body. Therefore, peeling of the angle conversion body from the light guide body can be suppressed. Therefore, a light source device capable of stably emitting light can be constituted.

[0481] Supplementary Note 2

[0482] The light source device according to Supplementary Note 1, characterized in that the angle conversion body is joined to the first end surface by an adhesive, and the second accommodating portion and the cover member forming the accommodating space permit movement of the angle conversion body along the first direction caused by at least any one of expansion and contraction of the adhesive.

[0483] With this structure, even if the adhesive expands or contracts due to heat, causing the angle converter to move in the first direction, the second housing portion and the cover member will not hinder the angle converter's movement in the first direction. This prevents the angle converter from being subjected to a load at the junction between the angle converter and the light guide. Consequently, it is possible to prevent the angle converter from being separated from the light guide.

[0484] Note 3

[0485] The light source device according to Note 1 or 2 is characterized in that the light source device has a retaining member having a retaining portion for retaining the side surface and a fixing portion fixed to the angle converter, the retaining member is configured to span the joining portion between the light guide and the angle converter, and the retaining member is configured in the storage space.

[0486] According to this structure, the retaining member, in which the retaining portion holds the side surface of the light guide and the fixing portion is fixed to the angle converter, is arranged across the junction between the light guide and the angle converter, thereby protecting the junction between the light guide and the angle converter. As a result, even if external force is applied to the angle converter, the angle converter can be prevented from peeling off from the light guide. Therefore, a light source device capable of stably emitting light can be formed.

[0487] Note 4

[0488] According to the light source device described in Note 3, it is characterized in that the cover part has a first inner surface forming the storage space, the second storage part has a second inner surface forming the storage space, and the retaining member does not contact the first inner surface and the second inner surface respectively.

[0489] This structure can suppress collisions between the holder and the first and second inner surfaces, not only when the holder moves in the first direction due to expansion or contraction caused by temperature changes, but also when the holder swings in a direction intersecting the first direction due to external forces acting on the light source device. Therefore, damage to the joint between the light guide and the angle converter can be suppressed, effectively preventing the angle converter from peeling off from the light guide.

[0490] Note 5

[0491] The light source device according to any one of Notes 1 to 4 is characterized in that the light source device comprises: a reflecting element, which is arranged on the second end surface and reflects light emitted from the second end surface toward the light guide; and a force-applying component, which is fixed to the base and applies force to the reflecting element toward the second end surface.

[0492] Here, when the second end face is fixed, if the light guide expands or contracts due to heat or the like, the position of the first end face in the first direction is likely to move.

[0493] In this regard, according to the above structure, even when the light guide expands or contracts, the amount of movement of the first end face in the first direction can be reduced by the elongation or contraction of the biasing member. Therefore, breakage of the joint portion between the light guide and the angle converter can be suppressed, and peeling of the angle converter from the light guide can be effectively suppressed.

[0494] Supplementary Note 6

[0495] The light source device according to any one of Supplementary Notes 1 to 5, characterized in that the base and the cover member each have heat dissipation properties.

[0496] According to such a structure, heat transferred from the light guide and the angle converter can be easily dissipated to the outside of the light source device through the base and the cover member. Therefore, the light source device can easily and stably emit light.

[0497] Supplementary Note 7

[0498] The light source device according to any one of Supplementary Notes 1 to 6, characterized in that the area of the cross section of the light guide orthogonal to the first direction is 0.25 mm 2 or more and 4.00 mm 2 or less.

[0499] According to such a structure, the angle converter mounted on the relatively thin light guide is likely to peel off from the light guide as described above.

[0500] In this regard, the second housing portion and the cover portion that form the housing space for housing the above-mentioned housed portion are difficult to come into contact with the angle converter, so that peeling of the angle converter from the relatively thin light guide can be effectively suppressed.

[0501] Supplementary Note 8[[ID=3I]]

[0502] The light source device according to any one of Supplementary Notes 1 to 7, characterized in that the light source outputs excitation light, and the light guide is a wavelength converter that emits converted light obtained by converting the wavelength of the incident excitation light.

[0503] According to such a structure, the light guide can convert the wavelength of the excitation light emitted from the light source and emit the converted light. Here, the light guide extends in the first direction, so that the optical path of the incident excitation light traveling in the light guide can be extended. Therefore, the conversion efficiency of the light guide from the excitation light to the converted light can be improved.

[0504] Supplementary Note 9

[0505] A projector, characterized in that the projector has: a light source device according to any one of Appendices 1-8; a light modulation device that modulates the light emitted from the light source device to form image light; and a projection optical device that projects the image light.

[0506] According to such a structure, in addition to being able to achieve the same effects as the above light source device, a projector that can stably emit image light can also be constituted.

[0507] Appendix 10

[0508] A light source device, characterized in that it includes: a light guide body having a side surface extending in a first direction and a first end surface intersecting the side surface; an angle conversion body that is joined to the first end surface and converts the angle of the light emitted from the first end surface; a base on which the light guide body is disposed; a substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on the side opposite to the base with the light guide body interposed therebetween and fixed to the base; and a cover member having a first inner surface that forms a storage space together with the base, being disposed on the side opposite to the base with the angle conversion body interposed therebetween and fixed to the base, the storage space storing a stored portion from the angle conversion body to a part of the light guide body on the angle conversion body side, the base having: a first storage portion to which the light guide body is fixed with the side surface exposed; and a second storage portion having a second inner surface that forms the storage space together with the cover member, and storing the stored portion in the storage space together with the cover member, a portion of the light guide body fixed to the first storage portion being a fixed end, a part of the light guide body on the angle conversion body side including the first end surface joined to the angle conversion body being a free end, and the angle conversion body not contacting the first inner surface and the second inner surface respectively.

[0509] According to such a structure, similar to the above light source device, a stored portion from the angle conversion body to a part of the light guide body on the angle conversion body side is stored in the storage space formed by the second storage portion and the cover member. Thereby, an external force acting on the circumferential surface of the angle conversion body centered on the optical axis of the angle conversion body can be suppressed.

[0510] In addition, in the light guide, a part on the side of the angle conversion body is a free end in the light guide, and the angle conversion body does not contact the first inner surface and the second inner surface respectively. Therefore, when the light guide expands or contracts, or when an external force is applied to the angle conversion body due to dropping or the like, even if the angle conversion body moves or swings in the storage space, the angle conversion body does not contact the first inner surface and the second inner surface respectively. As a result, it is possible to suppress the situation where the angle conversion body contacts the second storage portion and the cover member and an external force acts on the angle conversion body, and it is possible to suppress the situation where the angle conversion body peels off from the light guide. Therefore, a light source device capable of stably emitting light can be configured.

[0511] Supplementary Note 11

[0512] A light source device, characterized by comprising: a light guide having a side surface extending in a first direction and a first end surface intersecting the side surface; an angle conversion body joined to the first end surface for converting the angle of light emitted from the first end surface; a holding member having a holding portion for holding the side surface and a fixing portion fixed to the angle conversion body, the holding member being disposed across the joint portion of the light guide and the angle conversion body; a base on which the light guide is disposed; a substrate on which a light source for emitting light toward the side surface is mounted, the substrate being disposed on the side opposite to the base with the light guide interposed therebetween and fixed to the base; and a cover member having a first inner surface that forms a storage space together with the base, disposed on the side opposite to the base with the angle conversion body interposed therebetween and fixed to the base, the storage space storing a stored portion including the holding member and extending from the angle conversion body to a part on the angle conversion body side in the light guide, the base having: a first storage portion to which the light guide is fixed with the side surface exposed; and a second storage portion having a second inner surface that forms the storage space together with the cover member, and storing the stored portion in the storage space together with the cover member, a portion of the light guide fixed to the first storage portion being a fixed end, and a part on the angle conversion body side of the light guide including the first end surface joined to the angle conversion body being a free end, and the holding member not contacting the first inner surface and the second inner surface respectively.

[0513] According to such a structure, similarly to the above light source device, the holding portion holds the side surface of the light guide and the fixing portion is fixed to the angle conversion body, and the holding member is disposed across the joint portion of the light guide and the angle conversion body, whereby the joint portion of the light guide and the angle conversion body can be protected. As a result, even if an external force is applied to the angle conversion body, it is possible to suppress the angle conversion body from peeling off from the light guide.

[0514] In addition, a stored portion including a holding member is stored in a storage space formed by the second storage portion and the cover member. Thereby, it is possible to suppress an external force from acting on the circumferential surface of the holding member centered on the optical axis of the angle conversion body.

[0515] Moreover, in the light guide, a part on the angle conversion body side is a free end in the light guide, and the holding member does not contact the first inner surface and the second inner surface respectively. Therefore, when the light guide expands or contracts, or when an external force is applied to the holding member due to dropping or the like, even if the holding member moves or swings within the storage space, the holding member does not contact the first inner surface and the second inner surface respectively. Thereby, it is possible to suppress an external force from acting on the holding member due to contact between the holding member and the second storage portion and the cover member, and it is possible to suppress the angle conversion body from peeling off from the light guide.

[0516] Therefore, it is possible to configure a light source device that can stably emit light.

[0517] Supplementary Note 12

[0518] A light source device, characterized by comprising: a light emitting member that extends in a first direction and emits light in the first direction; a base on which the light emitting member is disposed; a light source that emits light incident on the light emitting member along a second direction intersecting the first direction; a substrate on which the light source is mounted, disposed on the side opposite to the base with the light emitting member interposed therebetween in the second direction, and covering a portion of the light emitting member in a direction opposite to the second direction; and a cover member disposed on the side opposite to the base with the light emitting member interposed therebetween. The light emitting member includes: a light guide having: a side surface that extends in the first direction and into which light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; and an angle conversion body that is joined to the end surface and converts the angle of light emitted from the end surface. The base has: a first storage portion in which the light guide is fixed with the side surface exposed; and a second storage portion that is provided in the first direction with respect to the first storage portion and forms a storage space together with the cover member, and the storage space stores a stored portion of the light emitting member from the angle conversion body to a portion in the first direction in the light guide, and the stored portion does not contact the inner surface of the storage space.

[0519] According to such a structure, similarly to the above-described light source device, it is possible to suppress the angle conversion body from peeling off from the light guide, and it is possible to configure a light source device that can stably emit light.

[0520] Supplementary Note 13

[0521] A light source device, characterized by comprising: a light emitting member that extends in a first direction and emits light in the first direction; a base on which the light emitting member is disposed; a light source that emits light incident on the light emitting member along a second direction intersecting the first direction; a substrate on which the light source is mounted, disposed on a side opposite to the base with the light emitting member therebetween in the second direction, and covering a portion of the light emitting member in a direction opposite to the first direction; and a cover member disposed on a side opposite to the base with the light emitting member therebetween. The light emitting member includes: a light guide having: a side surface that extends in the first direction and into which light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; an angle conversion body that is joined to the end surface and converts the angle of light emitted from the end surface; and a holder having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion body, the holder being disposed across the joining portion of the light guide and the angle conversion body. The base has: a first receiving portion in which the light guide is fixed with the side surface exposed; and a second receiving portion that is provided in the first direction with respect to the first receiving portion and forms a receiving space together with the cover member, the receiving space receiving a received portion including the holder and a portion of the light emitting member from the angle conversion body to the portion in the first direction in the light guide, and the received portion not contacting the inner surface of the receiving space.

[0522] According to such a structure, similar to the above light source device, it is possible to suppress the peeling of the angle conversion body from the light guide, and a light source device capable of stably emitting light can be configured.

Claims

1. A light source device, characterized in that, Comprising: A light guide having: a side surface extending in a first direction; and a first end surface and a second end surface located on opposite sides of each other and intersecting with the side surface. An angle conversion member that is joined to the first end surface and converts the angle of light emitted from the first end surface. A base on which the light guide is disposed. A substrate on which a light source that emits light toward the side surface is mounted, and the substrate is disposed on the side opposite to the base with the light guide interposed therebetween to cover the light guide and is fixed to the base; and A cover member that is fixed to the base and, together with the base, houses the angle conversion member therein. The base has: A first housing portion that houses the light guide with the side surface exposed, and the light guide is fixed to the first housing portion; and A second housing portion that, together with the cover member, houses a housed portion from the angle conversion member to a part on the angle conversion member side in the light guide. The second housing portion and the cover member surround the periphery of the housed portion to form a housing space for housing the housed portion. A portion of the light guide fixed to the first housing portion is a fixed end. A part of the light guide on the angle conversion member side including the first end surface joined to the angle conversion member is a free end.

2. The light source device according to claim 1, wherein: The angle conversion member is joined to the first end surface by an adhesive. The second housing portion and the cover member forming the housing space allow movement of the angle conversion member along the first direction caused by at least any one of expansion and contraction of the adhesive.

3. The light source device according to claim 1, wherein: The light source device includes a holding member having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion member, and the holding member is disposed across the joining portion of the light guide and the angle conversion member. The holding member is disposed in the housing space.

4. The light source device according to claim 3, wherein: The cover member has a first inner surface forming the housing space. The second housing portion has a second inner surface forming the housing space. The holding member does not contact the first inner surface and the second inner surface respectively.

5. The light source device according to any one of claims 1 to 3, wherein: The light source device includes: A reflection element that is disposed on the second end surface and reflects light emitted from the second end surface toward the light guide; and A biasing member that is fixed to the base and biases the reflection element toward the second end surface.

6. The light source device according to any one of claims 1 to 3, wherein: The base and the cover member each have heat dissipation properties.

7. The light source device according to any one of claims 1 to 3, wherein: The area of a cross-section of the light guide orthogonal to the first direction is 0.25 mm 2 or more and 4.00 mm 2 or less.

8. The light source device according to any one of claims 1 to 3, wherein: The light source outputs excitation light. The light guide is a wavelength conversion member that emits conversion light obtained by converting the wavelength of the incident excitation light.

9. A projector, characterized in that, Comprising: The light source device according to any one of claims 1 to 3; A light modulation device that modulates the light emitted from the light source device to form image light; and A projection optical device that projects the image light.

10. A light source device, characterized in that, Comprising: A light guide having a side surface extending in a first direction and a first end surface intersecting the side surface; An angle conversion body that is joined to the first end surface and converts the angle of the light emitted from the first end surface; A base on which the light guide is disposed; A substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on the side opposite to the base with the light guide therebetween and fixed to the base; And A cover member having a first inner surface that forms a storage space together with the base, being disposed on the side opposite to the base with the angle conversion body therebetween and fixed to the base, the storage space storing a stored portion from the angle conversion body to a part on the angle conversion body side in the light guide; The base has: A first storage portion to which the light guide is fixed with the side surface exposed; and A second storage portion having a second inner surface that forms the storage space together with the cover member, and storing the stored portion in the storage space together with the cover member; A portion of the light guide fixed to the first storage portion is a fixed end; A part of the light guide on the angle conversion body side including the first end surface joined to the angle conversion body is a free end; The angle conversion body does not contact the first inner surface and the second inner surface, respectively.

11. A light source device, characterized in that, Comprising: A light guide having a side surface extending in a first direction and a first end surface intersecting the side surface; An angle conversion body that is joined to the first end surface and converts the angle of the light emitted from the first end surface; A holding member having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion body, the holding member being disposed across the joining portion of the light guide and the angle conversion body; A base on which the light guide is disposed; A substrate on which a light source that emits light toward the side surface is mounted, the substrate being disposed on the side opposite to the base with the light guide therebetween and fixed to the base; And A cover member having a first inner surface that forms a storage space together with the base, being disposed on the side opposite to the base with the angle conversion body therebetween and fixed to the base, the storage space storing a stored portion including the holding member and from the angle conversion body to a part on the angle conversion body side in the light guide; The base has: A first storage portion to which the light guide is fixed with the side surface exposed; and A second storage portion having a second inner surface that forms the storage space together with the cover member, and storing the stored portion in the storage space together with the cover member; A portion of the light guide fixed to the first storage portion is a fixed end; A part of the light guide on the angle conversion body side including the first end surface joined to the angle conversion body is a free end; The holding member is not in contact with the first inner surface and the second inner surface, respectively.

12. A light source device, characterized in that, Comprising: A light emitting member that extends in a first direction and emits light in the first direction; A base on which the light emitting member is disposed; A light source that emits light incident on the light emitting member along a second direction intersecting the first direction; A substrate on which the light source is mounted, disposed on the opposite side of the base across the light emitting member in the second direction, and covering a portion of the light emitting member in the direction opposite to the second direction; And A cover member disposed on the opposite side of the base across the light emitting member, The light emitting member includes: A light guide having: a side surface that extends in the first direction and into which light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; and An angle conversion member that is joined to the end surface and converts the angle of light emitted from the end surface, The base has: A first accommodating portion in which the light guide is fixed with the side surface exposed; and A second accommodating portion that is provided in the first direction with respect to the first accommodating portion and forms an accommodating space together with the cover member, the accommodating space accommodating the accommodated portion of the light emitting member from the angle conversion member to the portion in the first direction of the light guide, The accommodated portion is not in contact with the inner surface of the accommodating space.

13. A light source device, characterized in that, Comprising: A light emitting member that extends in a first direction and emits light in the first direction; A base on which the light emitting member is disposed; A light source that emits light incident on the light emitting member along a second direction intersecting the first direction; A substrate on which the light source is mounted, disposed on the opposite side of the base across the light emitting member in the second direction, and covering a portion of the light emitting member in the direction opposite to the first direction; And A cover member disposed on the opposite side of the base across the light emitting member, The light emitting member includes: A light guide having: a side surface that extends in the first direction and into which light emitted from the light source is incident; and an end surface that is located in the first direction and intersects the side surface; An angle conversion member that is joined to the end surface and converts the angle of light emitted from the end surface; and A holding member having a holding portion that holds the side surface and a fixing portion fixed to the angle conversion member, the holding member being disposed across the joining portion of the light guide and the angle conversion member, The base has: A first accommodating portion in which the light guide is fixed with the side surface exposed; and A second accommodating portion that is provided in the first direction with respect to the first accommodating portion and forms an accommodating space together with the cover member, the accommodating space accommodating the accommodated portion including the holding member and the light emitting member from the angle conversion member to the portion in the first direction of the light guide, The accommodated portion is not in contact with the inner surface of the accommodating space.

Images