Light source device and projector

Abstract

Light source device and projector. A light source device and a projector capable of stably holding a light guide body and an angle conversion body are provided. The light source device includes: a light guide body having a side surface extending in a first direction, a first end surface facing the first direction, and a second end surface facing a direction opposite to the first direction; an angle conversion body engaged with the first end surface and converting an angle of light emitted from the first end surface; a light emitting element emitting light toward the side surface; a holding member with which the angle conversion body contacts in the first direction; and a base on which the light guide body and the holding member are disposed, the angle conversion body having a light passing portion and a flange portion protruding from the light passing portion in a direction intersecting the first direction, the base having a first opposing portion, the holding member having: a contact portion with which the flange portion contacts in the first direction; and a second opposing portion opposing the first opposing portion in the first direction, the holding member and the base being fixed by an adhesive filling a gap between the first opposing portion and the second opposing portion.

Description

Technical Field

[0001] This disclosure relates to light source devices and projectors. Background Technology

[0002] Previously, light source devices were known that converted and emitted light incident from a light-emitting element. As such a light source device, a light generation system is known that includes: a rod-shaped light-emitting body containing a phosphor; a collimator such as a compound parabolic concentrator (CPC) disposed on the light-emitting body; and an optical interface plate that houses at least a portion of the collimator (for example, see Patent Document 1).

[0003] In the light generation system described in Patent Document 1, a first fixing element and a second fixing element are installed on the optical interface plate to fix a collimator that passes through the optical interface plate. The first fixing element contacts the light incident side surface and the side surface of the collimator in the optical interface plate. The second fixing element contacts the light emitting side surface and the emitting surface of the collimator in the optical interface plate.

[0004] Patent Document 1: International Publication No. 2020 / 078790

[0005] However, if the optical interface plate supporting the collimator is fixed to the base supporting the light-emitting body, and the collimator is not properly fixed to the optical interface plate due to adhesion deviation between the light-emitting body and the collimator, it is possible to apply a load to the connection between the light-emitting body and the collimator, causing the light-emitting body to peel off from the collimator.

[0006] Furthermore, even when the collimator is fixed to the optical interface plate that is already fixed to the base, if the aforementioned bonding deviation occurs, stress will be generated that causes one end of the collimator's light-emitting side to separate from the optical interface plate. When such stress occurs, it is possible to apply a load to the connection between the light emitter and the collimator, causing the light emitter to peel off from the collimator.

[0007] Because of this problem, it is desirable to be able to stably maintain the structure of the light guide and the CPC (Center for Angular Conversion) and other similar components. Summary of the Invention

[0008] The light source device according to the first aspect of this disclosure includes: a light guide having a side surface extending in a first direction, a first end face intersecting the side surface and facing the first direction, and a second end face intersecting the side surface and facing a direction opposite to the first direction; an angle converter engaging with the first end face to convert the angle of light emitted from the first end face; a light-emitting element emitting light toward the side surface; a holding member having the angle converter contacting the holding member in the first direction; and a base having the light guide and the holding member disposed on the base, the angle converter having: The light-passing portion allows light incident from the light guide to pass through it; and the flange portion protrudes from the light-passing portion in a direction intersecting the first direction, preventing light incident from the light guide to the angle converter from passing through the flange portion. The base has a first opposing portion, and the retaining member has: a contact portion, with the flange portion contacting the contact portion along the first direction; and a second opposing portion, which opposes the first opposing portion in the first direction. The retaining member and the base are fixed together by an adhesive that fills the gap between the first opposing portion and the second opposing portion.

[0009] The projector according to the second aspect of this disclosure includes: a light source device according to the first aspect described above; a light modulation device that modulates light emitted from the light source device; and a projection optical device that projects light modulated by the light modulation device. Attached Figure Description

[0010] Figure 1 This is a schematic diagram showing the structure of the projector in the first embodiment.

[0011] Figure 2 This is a perspective view showing the light source device in the first embodiment.

[0012] Figure 3 This is a perspective view showing the light source device in the first embodiment.

[0013] Figure 4 This is a side view showing the fluorescence emission device in the first embodiment.

[0014] Figure 5 This is a perspective view showing the fluorescence emission device in the first embodiment.

[0015] Figure 6 This is a top view showing the light emitting component in the first embodiment.

[0016] Figure 7 This is a diagram showing the angle conversion body in the first embodiment.

[0017] Figure 8This is a perspective view showing the angle conversion body in the first embodiment.

[0018] Figure 9 This is a cross-sectional view showing the fluorescence emission device in the first embodiment.

[0019] Figure 10 This is an exploded perspective view showing the light source device in the first embodiment.

[0020] Figure 11 This is an exploded perspective view showing the light source device in the first embodiment.

[0021] Figure 12 This is an exploded perspective view showing the light source device in the first embodiment.

[0022] Figure 13 This is a perspective view showing the angle conversion body and the holding member in the first embodiment.

[0023] Figure 14 This is a perspective view showing the angle conversion body and the holding member in the first embodiment.

[0024] Figure 15 This is a cross-sectional view showing the light source device in the first embodiment.

[0025] Figure 16 This is a diagram showing the holding member included in the light source device of the projector in the second embodiment.

[0026] Label Explanation

[0027] 1: Projector; 11: Outer casing; 2: Image projection device; 21: Illumination device; 27: Light modulation device; 27B: Blue light modulation device; 27G: Green light modulation device; 27R: Red light modulation device; 29: Projection optical device; 3: Light source device; 4: Fluorescent emission device; 5: Light source section; 51: Substrate; 51A: First side; 51B: Second side; 52: Light source; 521: Light-emitting element; 53: Connector; 6: Light emission component; 61: Light guide; 611: First side (side); 612: Second side; 613: Third side; 614: Fourth side; 615: First end face; 616: Second end face; 62: Reflecting component; 63: Corner 630: Light transmission part; 631: Incident end face; 632: Exit end face; 633: First side face; 634: Second side face; 635: Third side face; 636: Fourth side face; 637: Flange part; 638, 638A, 638B, 638C, 638D: Contact area; 64: Adhesive; 7: Housing; 71: Base; 711: First storage part; 712: Second storage part; 713: First recess; 714: Second recess; 715: Placement part; 716: Third recess; 717, 717A, 717B: Pin; 7171: Insertion part; 7172: Large diameter part; 718: Opposing part (first opposing part); 72: First force-applying component; 73, 73A, 73B: Second force-applying component; 74: First cover component; 75: Second cover component; 76: First heat dissipation component; 77: Second heat dissipation component; 8: Holding component; 81: Opening; 82: Holding part; 83: Recess; 84: Positioning part; 85, 85A, 85B, 85C, 85D: Contact part; 851: Curved part; 86, 86A, 86B: Mounting part; 87, 87A, 87B: Hole; 871: Protrusion; 872: Opposing part (second opposing part); 88, 88A, 88B: First wall part; 881: Inclined surface; 89: Second wall part; AB: Adhesive; CL: Gap. Detailed Implementation

[0028] Implementation Method 1

[0029] Hereinafter, the first embodiment of the present disclosure will be described based on the accompanying drawings.

[0030] Projector outline

[0031] Figure 1 This is a schematic diagram showing the structure of the projector 1 according to this embodiment.

[0032] The projector 1 described in this embodiment is a display device that modulates light emitted from a light source to form image light, and then amplifies and projects the formed image light onto a projection surface SC, such as a screen. Figure 1As shown, the projector 1 includes an outer casing 11 constituting the outer part of the projector 1 and an image projection device 2 housed within the outer casing 11. Furthermore, although not shown in the figures, the projector 1 includes a control device for controlling the operation of the projector 1, a cooling device for cooling a cooling object, and a power supply device for supplying power to the electronic components constituting the projector 1.

[0033] Structure of image projection device

[0034] The image projection device 2 projects image light corresponding to the image information under the control of the aforementioned control device. The image projection device 2 includes an illumination device 21, a color separation optical system 24, a reflector 25, a parallelizing lens 26, a light modulation device 27, a color synthesis device 28, and a projection optical device 29.

[0035] The lighting device 21 includes: a first lighting device 22 that emits a fluorescent YL containing green light GL and red light RL; and a second lighting device 23 that emits blue light BL.

[0036] Structure of the first lighting device

[0037] The first illumination device 22 illuminates the fluorescent YL towards the color separation optical system 24. The first illumination device 22 includes a light source device 3, a parallelization optical system 221, an integrating optical system 222, a polarization conversion element 223, and an overlapping optical system 224.

[0038] The light source device 3 emits fluorescence YL. The structure of the light source device 3 will be described in detail later.

[0039] The parallelization optical system 221 parallelizes the fluorescence YL emitted from the light source device 3.

[0040] The integrating optical system 222 homogenizes the illuminance distribution of the fluorescence YL incident from the light source device 3 via the parallelizing optical system 221. In this embodiment, the integrating optical system 222 is composed of a first lens array 2221 and a second lens array 2222. Although detailed illustrations are 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 splits the fluorescence YL incident from the parallelizing optical system 221 into a plurality of partial beams, and the plurality of partial beams pass through corresponding second lenses among the plurality of second lenses. Alternatively, the integrating optical system 222 may also be composed of a rod-shaped integrator.

[0041] Multiple partial beams emitted from the second lens array 2222 are incident on the polarization conversion element 223. That is, the fluorescent YL is incident on the polarization conversion element 223. The polarization conversion element 223 converts the incident fluorescent YL into linearly polarized light and emits it.

[0042] The overlapping optical system 224 overlaps a portion of the green light GL from the multiple partial beams incident via the polarization conversion element 223 with the modulation region of the green light modulation device 27G, and overlaps a portion of the red light RL with the modulation region of the red light modulation device 27R. Furthermore, the fluorescence YL emitted from the overlapping optical system 224 is incident on the color separation optical system 24.

[0043] Structure of the second lighting device

[0044] The second lighting device 23 illuminates blue light BL onto the reflector 25. The second lighting device 23 includes a blue light source 231, a focusing 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 blue light BL.

[0045] The focusing element 232 focuses the blue light BL emitted from the blue light source 231 onto the homogenization device 233. The focusing element 232 may have, for example, multiple lenses 2321 and 2322.

[0046] The homogenization device 233 homogenizes the illuminance distribution of blue light BL incident from the focusing element 232. In this embodiment, the homogenization device 233 includes a diffuser plate 234 and a rod-shaped integrator 235.

[0047] The relay lens 236 relays the blue light BL incident from the homogenization device 233 to the reflector 25.

[0048] Structure of color separation optical system and mirror

[0049] The color separation optical system 24 separates the fluorescence YL incident from the first illumination device 22 into green light GL and red light RL, and guides the green light GL to the green light modulation device 27G and 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.

[0050] The dichroic mirror 241 separates the fluorescent YL incident from the first illumination device 22 into green light GL and red light RL.

[0051] The reflector 242 reflects the green light GL reflected by the dichroic mirror 241 toward the green light modulation device 27G.

[0052] The reflector 243 reflects the red light RL that has passed through the dichroic mirror 241 toward the red light modulation device 27R.

[0053] The reflector 25 reflects the blue light BL incident from the second illumination device 23 toward the blue light modulation device 27B.

[0054] Structure of a parallel lens

[0055] The parallelizing lens 26 is a field lens that parallelizes incident light. The parallelizing lens 26 includes a blue parallelizing lens 26B, a green parallelizing lens 26G, and a red parallelizing lens 26R.

[0056] Blue parallelizing lens 26B is positioned between reflector 25 and blue light modulation device 27B in the optical path of blue light BL. Blue parallelizing lens 26B parallelizes the blue light BL incident on blue light modulation device 27B.

[0057] A green light parallelizing lens 26G is positioned between the reflector 242 and the green light modulation device 27G in the optical path of the green light GL. The green light parallelizing lens 26G parallelizes the green light GL incident on the green light modulation device 27G.

[0058] A red parallelizing lens 26R is positioned between the reflector 243 and the red light modulation device 27R in the optical path of the red light RL. The red parallelizing lens 26R parallelizes the red light RL incident on the red light modulation device 27R.

[0059] Structure of an optical modulation device

[0060] The light modulation apparatus 27 is an image forming apparatus that modulates incident light according to image information. The light modulation apparatus 27 includes a blue light modulation apparatus 27B that modulates blue light BL, a green light modulation apparatus 27G that modulates green light GL, and a red light modulation apparatus 27R that modulates red light RL.

[0061] In this embodiment, each of the light modulation devices 27B, 27G, and 27R consists 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.

[0062] Color synthesis device and projection optics device

[0063] The colored lights BL, GL, and RL, modulated by the light modulation devices 27R, 27G, and 27B, are incident on the color combining device 28. The color combining device 28 combines the incident colored lights BL, GL, and RL to generate image light projected by the projection optics device 29. In this embodiment, the color combining device 28 is composed of a cross-shaped dichroic prism, but it can also be composed of multiple dichroic mirrors.

[0064] The projection optical device 29 projects the image light synthesized by the color synthesis device 28 onto the projection surface SC through the projection port 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 lens group having multiple lenses and a cylindrical lens barrel that houses multiple lenses can be exemplified.

[0065] Structure of the light source device

[0066] Figure 2 This is a perspective view of the light source device 3 as observed from the emission side of the fluorescent YL. Figure 3 This is a perspective view of the light source device 3 as seen from the side opposite to the emission side of the fluorescence YL.

[0067] like Figure 2 and Figure 3 As shown, the light source device 3 includes a fluorescence emitting device 4 and a housing 7 for housing the fluorescence emitting device 4. Furthermore, the light source device 3 includes... Figure 2 and Figure 3 The retaining component 8 is not shown in the figure.

[0068] In the following description, the three mutually perpendicular directions are designated as the +X direction, +Y direction, and +Z direction. In this embodiment, the +Z direction is designated as the direction in which the light source device 3 emits fluorescence YL, and the +Y direction is designated as the direction in which the light source unit 5 is located within the housing 7 relative to the base 71 (described later). The +X direction is designated as the right direction when viewed from the +Z direction with the +Y direction pointing upwards. Although the illustrations are omitted, the opposite direction of the +X direction is designated as the -X direction, the opposite direction of the +Y direction is designated as the -Y direction, and the opposite direction of the +Z direction is designated as the -Z direction.

[0069] Structure of a fluorescence emission device

[0070] Figure 4 This is a side view showing the fluorescence emission device 4 as viewed from the +X direction. Figure 5 This is a three-dimensional view obtained by observing the fluorescence emission device 4 from the -Z direction.

[0071] The fluorescence emission device 4 is housed in the casing 7 and emits fluorescence YL. For example... Figure 4 and Figure 5 As shown, the fluorescence emission device 4 includes a light source unit 5 and a light emission component 6.

[0072] Structure of the light source section

[0073] The light source unit 5 emits light to the light guide 61, which will be described later, from the light emitting member 6. In this embodiment, the light source unit 5 emits excitation light from the light guide 61 to excite the phosphor contained in the light guide 61. The light source unit 5 is disposed in the +Y direction relative 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.

[0074] The substrate 51 is disposed on the side of the housing 7 opposite to the base 71 described later, with the light guide 61 passing through it, 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.

[0075] When the substrate 51 is fixed to the base 71, the first surface 51A contacts the first heat dissipation component 76, which will be described later, in a manner that enables heat transfer.

[0076] The second surface 51B is the surface opposite to the first surface 51A. The light source 52 and the connector 53 are mounted on the second surface 51B. That is, the second surface 51B supports the light source 52 and the connector 53.

[0077] Light source 52 emits excitation light in the -Y direction. Light source 52 is composed of at least one light-emitting element 521 arranged along the +Z direction, with the light-emitting surface of the light-emitting element 521 facing the first side surface 611 of the light guide 61 (described later). That is, multiple light-emitting elements 521 emit excitation light incident on the first side surface 611. The excitation light emitted by the light-emitting elements 521 is, for example, light in the first wavelength band of 400nm to 480nm, and the peak wavelength of the excitation light is, for example, 445nm. In this embodiment, the light-emitting element 521 is an LED (Light Emitting Diode) element, but it can also be other light-emitting elements such as an LD (Laser Diode) element. Connector 53 is provided in the second surface 51B at a position in the -X direction relative to light source 52. Power to illuminate the light-emitting element 521 is supplied to connector 53 from the outside.

[0078] Structure of light emitting component

[0079] Figure 6 This is a top view showing the light-emitting component 6 as viewed from the +Y direction.

[0080] The light emitting component 6 has the function of guiding light emitted from the light source unit 5 to the outside of the light source device 3. In this embodiment, the light emitting component 6 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 3. That is, the light emitting component 6 is a wavelength conversion component and a light transmission component.

[0081] like Figures 5-7As shown, the light emitting component 6 includes a light guide 61, a reflective component 62, an angle converter 63, and an adhesive 64.

[0082] Structure of light guide

[0083] Excitation light is incident from the light-emitting element 521 along the -Y direction onto the light guide 61. The light guide 61 emits light based on the incident excitation light in the +Z direction, which intersects the -Y direction. In this embodiment, the light guide 61 contains a phosphor excited by the incident excitation light. The light guide 61 generates a phosphor YL with a wavelength different from the wavelength of the incident excitation light and emits it in the +Z direction. That is, the light guide 61 is a wavelength converter that converts the wavelength of the incident excitation light to emit phosphor YL. Furthermore, the phosphor contained in the light guide 61 can be, for example, a YAG-based phosphor containing yttrium, aluminum, and garnet.

[0084] like Figures 4-6 As 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 generally quadrangular prism that is longer along the +Z direction. Furthermore, the area of ​​the cross-section of the light guide 61 perpendicular to the +Z direction is approximately constant in the +Z direction, and is 0.25 mm². 2 Above and 4.00mm 2 the following.

[0085] Sides 611 to 614 extend along the +Z direction. For example... Figures 4-6 As shown, the first side 611 is the outer surface facing the +Y direction.

[0086] like Figure 5 and Figure 6 As shown, the first side 611 is opposite to the light source 52 and includes the incident area where the excitation light is incident from the light source 52.

[0087] like Figure 5 and Figure 6 As shown, the second side surface 612 is the outer surface facing the -X direction, as... Figure 5 As shown, the third side surface 613 is the outer surface facing the -Y direction, as... Figures 4-6 As shown, the fourth side 614 is the outer surface facing the +X direction.

[0088] like Figure 6 As shown, the first end face 615 and the second end face 616 are faces located on opposite sides in the +Z direction. The first end face 615 is the outer surface of the light guide 61 facing the +Z direction, and the second end face 616 is the outer surface of the light guide 61 facing the -Z direction. The first end face 615 and the second end face 616 intersect with the side faces 611 to 614, respectively. The first end face 615 and the second end face 616 are each square in shape.

[0089] The reflective component 62 is pressed against the second end face 616 by the first force-applying component 72, which will be described later. Light emitted from the second end face 616 in the -Z direction to the outside of the light guide 61 is reflected by the reflective component 62 in the +Z direction and enters the light guide 61 from the second end face 616.

[0090] The first end face 615 is the emission surface from which the fluorescence YL generated within the light guide 61 is emitted in the +Z direction. The angle converter 63 is bonded to the first end face 615 by adhesive 64.

[0091] Structure of angle conversion body

[0092] An angle converter 63 is disposed on the first end face 615. The angle converter 63 is a compound parabolic concentrator (CPC), for example, constructed from a light-transmitting material such as borosilicate glass and cycloolefin resin, and is approximately in the shape of a frustum-shaped pyramid. Figures 4-6 As shown, the angle conversion body 63 has a light-passing portion 630 and a flange portion 637.

[0093] The light-passing portion 630 is the portion through which the fluorescent YL incident from the light guide 61 passes in the angle conversion body 63. The light-passing portion 630 has an incident end face 631, an exit end face 632, and side faces 633, 634, 635, and 636.

[0094] like Figure 4 as well as Figure 6 As shown, the incident end face 631 is disposed opposite to the first end face 615 and is bonded to the first end face 615 by an adhesive 64. That is, the incident end face 631 is the surface of the angle converter 63 facing the -Z direction and opposite to the first end face 615. Fluorescent YL emitted from the first end face 615 is incident on the incident end face 631.

[0095] The exit face 632 is the face opposite to the incident face 631, and it faces the +Z direction. The exit face 632 emits the fluorescent YL that is incident from the incident face 631 into the angle converter 63.

[0096] Figure 7 This is a front view showing the angle conversion body 63 as viewed from the -Z direction.

[0097] The four side surfaces 633-636 are outer surfaces that intersect with the incident end surface 631 and the exit end surface 632, respectively, and are circumferential outer surfaces centered on the optical axis Ax of the angle conversion body 63. Each side surface 633-636 is a parabolic curved surface.

[0098] like Figure 7As shown, the first side surface 633 faces the +Y direction, the third side surface 635 faces the -Y direction, the second side surface 634 faces the -X direction, and the fourth side surface 636 faces the +X direction. The inner surfaces of each side surface 633 to 636 function as reflective surfaces that reflect the fluorescence YL incident on the interior of the angle converter 63 via the incident end surface 631 to the exit end surface 632.

[0099] like Figure 4 and Figure 6 As shown, the cross-sectional area of ​​the light-passing portion 630 perpendicular to the optical axis Ax of the angle conversion body 63, that is, the cross-sectional area of ​​the light-passing portion 630 perpendicular to the +Z direction, increases as it moves from the incident end face 631 toward the exit end face 632, and the area of ​​the exit end face 632 is larger than the area of ​​the incident end face 631.

[0100] like Figure 6 As shown, the dimensions of the sides 633 and 635 along the +X direction increase as they move from the incident end face 631 toward the exit end face 632.

[0101] like Figure 4 As shown, the dimensions of the sides 634 and 636 along the +Y direction increase as they move from the incident end face 631 toward the exit end face 632.

[0102] Furthermore, the +X and +Y directions are perpendicular to the optical axis Ax of the angle converter 63 along the +Z direction. The optical axis Ax of the angle converter 63 is an axis that passes through the center of the incident end face 631 and the exit end face 632 and is parallel to the +Z direction. That is, the incident end face 631 and the exit end face 632 are perpendicular to the optical axis Ax. In addition, the optical axis Ax is aligned with the optical axis of the first illumination device 22.

[0103] Figure 8 This is a rear view of the angle conversion body 63 as seen from the +Z direction.

[0104] The flange portion 637 is the portion that protrudes radially outward from the light-passing portion 630, centered on the optical axis Ax. The flange portion 637 is located at the end of the light-exiting side of the light-passing portion 630, and the +Z direction surface 637A of the flange portion 637 coincides with the exit end surface 632. That is, the flange portion 637 is located in the region where the fluorescence YL, which enters from the incident end surface 631 and exits from the exit end surface 632 in the angle conversion body 63, does not pass through. Specifically, as... Figures 4-8 As shown, the flange portion 637 is the part that protrudes from the light-passing portion 630 into the +X and +Y directions, which intersect the optical axis Ax along the +Z direction, respectively. It is the part through which the fluorescence YL incident from the light guide 61 to the angle converter 63 does not pass.

[0105] The flange portion 637 has a contact area 638 on its surface 637A that contacts the retaining member 8 described later. In other words, the flange portion 637 has a contact area 638 located on its surface 637A.

[0106] The contact area 638 includes contact areas 638A, 638B, 638C, and 638D disposed at the four corners of the surface 637A. The contact area 638 includes: contact area 638A, which is located at the corner of the surface 637A in the -X and +Y directions; contact area 638B, which is located at the corner in the -X and -Y directions; contact area 638C, which is located at the corner in the +X and +Y directions; and contact area 638D, which is located at the corner in the +X and -Y directions.

[0107] Contact areas 638A, 638B and contact areas 638C, 638D are located at positions separated from the optical axis Ax in the +X direction. Additionally, contact areas 638A, 638C and contact areas 638B, 638D are located at positions separated from the optical axis Ax in the +Y direction.

[0108] At least three of the contact areas 638, 638A, 638B, 638C, and 638D, are in contact with the contact portion 85 of the retaining member 8, which will be described later.

[0109] Adhesive structure

[0110] like Figure 4 and Figure 6 As shown, adhesive 64 bonds the first end face 615 of the light guide 61 and the incident end face 631 of the angle converter 63. In this embodiment, adhesive 64 is disposed in the entire area between the first end face 615 and the incident end face 631.

[0111] Here, fluorescent YL incident from the interior of the light guide 61 onto the inner surface of the first end face 615 at an angle greater than the critical angle undergoes total internal reflection at the inner surface of the first end face 615, and therefore cannot be incident onto the angle converter 63. In the region where a gap is provided between the first end face 615 and the incident end face 631, the critical angle becomes smaller, and therefore, the amount of fluorescent YL incident into the angle converter 63 through the first end face 615 decreases.

[0112] In contrast, an adhesive 64 is provided in the entire area 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, the decrease in the critical angle can be suppressed, and the amount of fluorescence YL that cannot reach the angle converter 63 can be reduced. In other words, when there is no gap between the first end face 615 and the incident end face 631, fluorescence YL can easily be incident from the first end face 615 to the incident end face 631. From this point of view, it is preferable that the difference between the refractive index of the light guide 61 and the refractive index of the adhesive 64, and the difference between the refractive index of the adhesive 64 and the refractive index of the angle converter 63, be as small as possible.

[0113] In this embodiment, the light guide 61 is made of a material containing a YAG-based phosphor, and the angle converter 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 converter 63 is 1.50 or higher and 1.55 or lower. Therefore, it is difficult to make the refractive index of the light guide 61 match the refractive index of the angle converter 63. Therefore, it is preferable to minimize the difference between the refractive index of the angle converter 63 and the refractive index of the adhesive 64.

[0114] When the angle converter 63 is made of borosilicate glass, its refractive index is approximately 1.5. In contrast, by using a phenyl silicone resin adhesive to form the adhesive 64, and by adding additives as needed to appropriately adjust the refractive index of the adhesive 64, the refractive index of the adhesive 64 that bonds the light guide 61 and the angle converter 63 can be made approximately 1.5. This reduces the difference between the refractive index of the angle converter 63 and the refractive index of the adhesive 64, allowing the fluorescence YL to easily enter the angle converter 63 from the light guide 61. Furthermore, since it is necessary for the fluorescence YL emitted from the first end face 615 to enter the incident end face 631, the adhesive 64 must be transparent. Additionally, the adhesive 64 is preferably a phenyl silicone resin adhesive that is thermosetting or UV-curable.

[0115] Fluorescence emission based on light guide and angle converter

[0116] Figure 9 This is a cross-section of the fluorescence emission device 4 along the YZ plane, and a diagram showing the optical path of the fluorescence YL emitted from the light guide 61 and the angle conversion body 63.

[0117] like Figure 9As 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, which serves as a wavelength converter, the phosphor contained inside the light guide 61 is excited and diffuses out fluorescence YL from any emission point. The fluorescence YL travels in all directions from any emission point, and the fluorescence YL towards the sides 611 to 614 of the light guide 61 undergoes repeated total internal reflection at multiple locations on the inner surfaces of each side surface 611 to 614, and travels within the light guide 61 towards the first end face 615 or the second end face 616.

[0118] Fluorescent YL, which travels inside the light guide 61, exits from the first end face 615. The fluorescent YL traveling towards the first end face 615 exits from the first end face 615 and enters the angle converter 63 via the adhesive 64. The fluorescent YL traveling towards the second end face 616 is reflected by the reflective component 62 and then enters the second end face 616 before traveling towards the first end face 615.

[0119] Furthermore, a portion of the excitation light EL incident on the light guide 61 that is not used for excitation of the phosphor is reflected by components surrounding the light guide 61, which includes the light-emitting element 521 of the light source 52, or by the reflective component 62 disposed on the second end face 616. Therefore, a portion of the excitation light EL is trapped inside the light guide 61 and reused. Additionally, the components surrounding the light guide 61 include the inner surface of the first receiving portion 711 of the base 71, which will be described later.

[0120] During the travel of the fluorescent YL incident on the angle converter 63 within the angle converter 63, whenever the fluorescent YL undergoes total internal reflection on the inner surfaces of the sides 633-636, its travel direction changes in a manner approximately 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 fluorescent YL emitted from the first end face 615 of the light guide 61. Specifically, the angle converter 63 ensures that the maximum emission angle of the fluorescent YL at the emission end face 632 is less than the maximum incident angle of the fluorescent YL at the incident end face 631.

[0121] Typically, the optical spread of light, defined by the product of the area of ​​the light emanating region and the solid angle of the light (maximum emission angle), is preserved. Therefore, the optical spread of the fluorescent YL is also preserved before and after transmission through the angle converter 63. As mentioned above, the area of ​​the emanating end face 632 is larger than the area of ​​the incident end face 631. Therefore, from the viewpoint of preserving optical spread, the angle converter 63 can make the maximum emission angle of the fluorescent YL at the emanating end face 632 smaller than the maximum incident angle of the fluorescent YL incident on the incident end face 631.

[0122] shell structure

[0123] Figure 10This is an exploded perspective view of the light source device 3 as seen from the +Y direction. Figure 11 This is an exploded perspective view of the light source device 3 as seen from the -Y direction.

[0124] like Figure 2 , Figure 3 , Figure 10 as well as Figure 11 As shown, the housing 7 supports the fluorescence emitting device 4 and the holding component 8, and internally houses the fluorescence emitting device 4 and the holding component 8. Figure 10 as well as Figure 11 As shown, the housing 7 includes a base 71, a first force-applying component 72, two second force-applying components 73, a first cover component 74, a second cover component 75, a first heat dissipation component 76, and a second heat dissipation component 77.

[0125] Base structure

[0126] The base 71 supports the light emitting component 6 and the holding component 8 in the -Y direction. That is, the light emitting component 6 and the holding component 8 are disposed on the base 71. Furthermore, a first force-applying component 72, a second force-applying component 73, a first cover component 74, a second cover component 75, a first heat dissipation component 76, and a second heat dissipation component 77 are fixed to the base 71. The base 71 is, for example, a metal body formed of metals such as aluminum, iron, or stainless steel, and in addition to having high thermal conductivity, also has heat dissipation properties.

[0127] The base 71 is formed as a rectangular plate that is longer along the +Z direction when viewed from the +Y direction. The base 71 has surfaces 71A, 71B, 71C, 71D, 71E, and 71F.

[0128] In the base 71, the first surface 71A faces the +Y direction, and the second surface 71B faces the -Y direction. The second surface 71B is the surface opposite to the first surface 71A.

[0129] In base 71, the third surface 71C faces the +Z direction, and the fourth surface 71D faces the -Z direction. The fourth surface 71D is the surface opposite to the third surface 71C.

[0130] In base 71, surface 5 71E faces the -X direction, and surface 6 71F faces the +X direction. Surface 6 71F is the side opposite to surface 5 71E.

[0131] Thus, faces 71C, 71D, 71E, and 71F are faces that intersect with face 71A (first face) and face 71B (second face), respectively.

[0132] Figure 12 This is an exploded perspective view of the light source device 3 as seen from the +Y direction.

[0133] like Figure 10 as well as Figure 12 As shown, the base 71 also has a first storage portion 711, a second storage portion 712, a first recess 713, a second recess 714, a placement portion 715, a third recess 716, and a pin 717, with each portion 711 to 715 provided on the first surface 71A.

[0134] Structure of the first storage section

[0135] The first receiving portion 711 receives the light guide 61. Specifically, the light guide 61 is disposed in the first receiving portion 711 with its first side 611 exposed. The first receiving portion 711 is a groove that extends linearly along the +Z direction and opens in the +Y direction. The first receiving portion 711 is located at the center of the first surface 71A in the +X direction.

[0136] Structure of the second storage section

[0137] The second storage section 712 is provided in the +Z direction relative to the first storage section 711. The second storage section 712 is a recess that opens in the +Y and +Z directions and is rectangular in shape when viewed from the +Y direction.

[0138] The second storage section 712 is connected to the first storage section 711 that stores the light guide 61, and stores the +Z direction end of the light guide 61, the angle conversion body 63, the adhesive 64, and the retaining member 8.

[0139] Overview of the sales structure

[0140] Two pins 717 are provided in the second storage section 712. The two pins 717 are separated from each other in the +X direction and protrude from the bottom surface of the second storage section 712 towards the +Y direction. Specifically, the two pins 717 are positioned in the +X direction, sandwiching the angle conversion body 63 disposed in the second storage section 712. More specifically, when viewed from the +Y direction, the two pins 717 are arranged linearly symmetrically about the optical axis Ax, separated by the angle conversion body 63. That is, the two pins 717 include a pin 717A located in the -X direction and a pin 717B located in the +X direction.

[0141] Pins 717A and 717B each have an opposing portion 718 on the surface facing the +X direction. The opposing portion 718 corresponds to the first opposing portion in this embodiment, and is opposite to the inner surface of the hole 87 of the retaining member 8 described later in the +X direction.

[0142] Pins 717A and 717B are stepped pins, which will be discussed in detail later.

[0143] Structure of the first recess and the second recess

[0144] The first recess 713 and the second recess 714 are recesses that extend across the first receiving portion 711 extending along the +Z direction and along the +X direction, and are recessed from the first surface 71A towards the -Y direction. The first recess 713 and the second recess 714 are separated from each other in the +Z direction, and the second recess 714 is located in the -Z direction relative to the first recess 713. The second force-applying member 73A of the two second force-applying members 73 is fixed to the first recess 713 by a screw S1, and the second force-applying member 73B is fixed to the second recess 714 by a screw S2.

[0145] Structure of the configuration section and the third recess

[0146] The configuration section 715 is a recess located at the end of the first surface 71A in the -Z direction and recessed from the first surface 71A in the -Y direction. The first force-applying member 72 is configured in the configuration section 715.

[0147] The third recess 716 is a recessed portion 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 5 is fixed to the base 71, the connector 53 of the substrate 51 is disposed in the third recess 716.

[0148] Structure of the first force-applying component and the second force-applying component

[0149] The first force-applying member 72 is disposed in the mounting section 715 and applies force to the reflective member 62 toward the second end face 616 of the light guide 61. The first force-applying member 72 may be, for example, a leaf spring.

[0150] The second force-applying component 73 is a fixing component that fixes the light guide 61 to the base 71. In detail, the second force-applying component 73 is fixed to the base 71 while applying force to the light guide 61 from the +Y direction toward the base 71, thereby fixing the light guide 61 to the base 71.

[0151] In this embodiment, two second force-applying components 73 are provided. One of the two second force-applying components 73 is a second force-applying component 73A disposed in the first recess 713, and the other is a second force-applying component 73B disposed in the second recess 714. The second force-applying component 73B is moved away from the second force-applying component 73A in the -Z direction.

[0152] In this embodiment, each of the second force-applying components 73A and 73B is composed of a leaf spring. Specifically, each of the second force-applying components 73A and 73B has a pressing portion 731 extending along the +X direction, and two fixing portions 732 provided at both ends of the pressing portion 731 in the +X direction.

[0153] The pressing part 731 contacts the first side surface 611 of the light guide 61 and presses the light guide 61 toward the first storage part 711.

[0154] The two fixing parts 732 are fixed to the bottom surface of the first recess 713 or the bottom surface of the second recess 714 by screws. Thus, the light guide 61 is fixed to the first storage part 711.

[0155] Furthermore, the force exerted by the first force-applying member 72 is greater than the value obtained by multiplying the number of second force-applying members 73, the frictional force of the light guide 61, and the force exerted by the second force-applying member 73. In this embodiment, the force exerted by the first force-applying member 72 is greater than the value obtained by multiplying the number of second force-applying members 73A and 73B (i.e., "2"), the frictional force of the light guide 61, and the force exerted by the second force-applying member 73. Therefore, when the first receiving portion 711 is subjected to force by the second force-applying member 73, the light guide 61 is subjected to force in the +Z direction by the first force-applying member 72, thereby the holding member 8, which is in contact with the angle conversion body 63, is subjected to force in the +Z direction.

[0156] Structure of the first cover component and the second cover component

[0157] The first cover component 74 is fixed to the base 71 and covers the second storage portion 712 in the +Y direction. That is, the first cover component 74 covers the angle conversion body 63 and the retaining member 8 described later in the +Y direction. The first cover component 74 is configured as a rectangular plate that is longer in the +Z direction.

[0158] The second cover component 75 is fixed to the third surface 71C of the base 71 and covers the second storage portion 712 in the +Z direction. The second cover component 75 is configured as a rectangular plate that is longer in the +X direction. The second cover component 75 has an emission port 751 through which the fluorescent YL emitted from the angle converter 63 passes, and the fluorescent YL is emitted to the outside of the light source device 3 through the emission port 751.

[0159] The first cover component 74 and the second cover component 75 are made of the same metal as the base 71 and have heat dissipation properties.

[0160] Structure of the first heat dissipation component and the second heat dissipation component

[0161] The first heat dissipation member 76 is disposed in the +Y direction relative to the light source unit 5 and is fixed to the base 71 in a state where it is connected to the first surface 51A of the substrate 51 of the light source unit 5 in a manner that enables heat transfer. The first heat dissipation member 76 receives heat generated in the light source 52 and the connector 53 via the substrate 51 and dissipates the heat received. That is, the first heat dissipation member 76 dissipates the heat from the light source 52 and the connector 53 transmitted via the substrate 51 to the outside of the light source device 3.

[0162] The second heat dissipation component 77 is disposed in the -Y direction relative to the base 71 and is fixed to the second surface 71B of the base 71. The second heat dissipation component 77 is connected to the portion of the base 71 that constitutes the first receiving portion 711 in a manner that enables heat transfer. The second heat dissipation component 77 dissipates heat transferred from the light guide 61 via the base 71 to the outside of the light source device 3.

[0163] In this embodiment, the first heat dissipation component 76 and the second heat dissipation component 77 each have a structure in which a plurality of fins FN are arranged along the XY plane in the +Z direction. However, this is not a limitation; at least one of the heat dissipation components 76 and 77 may also have a plurality of pins instead of a plurality of fins FN. That is, the structure of the heat dissipation components 76 and 77 is not limited to the structure described above.

[0164] Maintain the structure of the components

[0165] Figure 13 This is a perspective view showing the angle conversion body 63 and the holding member 8 as viewed from the -Z direction. Figure 14 This is a perspective view showing the angle conversion body 63 and the holding component 8 as viewed from the +Z direction.

[0166] like Figure 10 As shown, the retaining member 8 is fixed to the base 71 in the state of retaining the angle conversion body 63. In detail, the retaining member 8 engages with the pin 717 provided in the second storage part 712 in the state of retaining the angle conversion body 63, and is fixed to the pin 717 by adhesive.

[0167] like Figure 13 as well as Figure 14 As shown, the retaining member 8 has an opening 81, a retaining part 82, and a mounting part 86.

[0168] When viewed from the ±Z direction, the opening 81 is roughly rectangular in shape. The opening 81 is an opening through which light emitted from the angle converter 63 held by the holding part 82 passes.

[0169] The retaining part 82 holds the angle conversion body 63 inserted from the -Z direction. The retaining part 82 is provided in the retaining member 8 at approximately the center in the +X direction. The retaining part 82 has a pair of recesses 83, a pair of positioning parts 84, and a plurality of contact parts 85.

[0170] A pair of recesses 83 are recessed in the +X direction, sandwiching the opening 81. Of the pair of recesses 83, recess 83A, located in the -X direction relative to the opening 81, is recessed in both the -X and +Z directions and opens in both the +X and -Z directions. Of the pair of recesses 83, recess 83B, located in the +X direction relative to the opening 81, is recessed in both the +X and +Z directions and opens in both the -X and -Z directions.

[0171] A pair of positioning portions 84 are protrusions protruding from opposing surfaces of a pair of recesses 83, and are used to position an angle converter 63 disposed within the pair of recesses 83. Positioning portion 84A, located in the -X direction, protrudes from the +X direction facing surface in recess 83A. Positioning portion 84B, located in the +X direction, protrudes from the -X direction facing surface in recess 83B. The angle converter 63 is inserted into the pair of recesses 83 in a manner disposed between the pair of positioning portions 84.

[0172] The contact area 638 in the exit end face 632 of the angle converter 63 contacts a plurality of contact portions 85 from the -Z direction. The plurality of contact portions 85 includes contact portions 85A and 85B provided in the recess 83A and contact portions 85C and 85D provided in the recess 83B.

[0173] Contact portion 85A is located in the +Y direction of the surface of recess 83A facing the -Z direction, and contact portion 85B is located in the -Y direction of the surface of recess 83A facing the -Z direction. Contact area 638A contacts contact portion 85A, and contact area 638B contacts contact portion 85B.

[0174] Contact portion 85C is located in the +Y direction of the surface of recess 83B facing the -Z direction, and contact portion 85D is located in the -Y direction of the surface of recess 83B facing the -Z direction. Contact area 638C contacts contact portion 85C, and contact area 638D contacts contact portion 85D.

[0175] The angle converter 63 is held by the holding member 8 while the contact area 638 is in contact with at least three of the contact portions 85 among the contact portions 85A, 85B, 85C, and 85D. Thus, the holding member 8 is held with high precision by the angle converter 63.

[0176] The mounting portion 86 is provided at a position that sandwiches the opening portion 81 and the retaining portion 82 in the +X direction, and is mounted on the base 71 by a pin 717. The mounting portion 86 includes a mounting portion 86A located in the -X direction relative to the opening portion 81 and a mounting portion 86B located in the +X direction relative to the opening portion 81. The mounting portions 86A and 86B each have a hole portion 87, a first wall portion 88, and a second wall portion 89. Hereinafter, the hole portion 87, the first wall portion 88, and the second wall portion 89 of the mounting portion 86A will be referred to as hole portion 87A, first wall portion 88A, and second wall portion 89A, and the hole portion 87, the first wall portion 88, and the second wall portion 89 of the mounting portion 86B will be referred to as hole portion 87B, first wall portion 88B, and second wall portion 89B.

[0177] like Figure 14As shown, hole 87 is a hole that penetrates mounting portion 86 along the +Y direction, and pin 717 of base 71 is inserted into hole 87 in the +Y direction. Specifically, pin 717A is inserted into hole 87A along the +Y direction, and pin 717B is inserted into hole 87B along the +Y direction. The cross-sectional shape of hole 87 will be described in detail later.

[0178] The first wall portion 88A protrudes from the periphery of the hole portion 87A in the +Y direction and faces the pin 717 inserted into the hole portion 87. Specifically, the first wall portion 88A is a semi-circular wall protruding in the +Y direction from the periphery of the hole portion 87A in the -Z direction. The first wall portion 88A has an inclined surface 881 located in the portion of the first wall portion 88A facing inwards towards the hole portion 87, and approaching the center of the hole portion 87 in the -Y direction. That is, the inclined surface 881 is the inclined surface that approaches the pin 717A inserted into the hole portion 87A in the -Y direction. The first wall portion 88B also has the same structure as the first wall portion 88A.

[0179] The second wall portion 89A is a wall that protrudes from the periphery of the hole portion 87A in the -Y direction and opposes the pin 717 inserted into the hole portion 87. More specifically, the second wall portion 89A is a semi-circular wall that protrudes in the -Y direction from the periphery of the hole portion 87A in the -Z direction. The second wall portion 89B also has the same structure as the second wall portion 89A.

[0180] Detailed structure of the pin

[0181] Figure 15 This is a diagram showing a cross-section of the light source device 3 at pin 717 along the YZ plane. Furthermore, in Figure 15 The illustrations of the first cover component 74, heat dissipation components 76 and 77, and light source unit 5 are omitted.

[0182] like Figure 15 As shown, pin 717 is a stepped pin with an insertion portion 7171 and a large-diameter portion 7172 of different outer diameters.

[0183] The insertion portion 7171 is a generally cylindrical part that is inserted into the hole portion 87 from the -Y direction. The opposing portion 718 described above is the portion of the insertion portion 7171 facing the -Z direction. That is, the outer diameter of the insertion portion 7171 is smaller than the inner diameter of the hole portion 87.

[0184] The large-diameter portion 7172 is a generally cylindrical portion located in the -Y direction relative to the insertion portion 7171. The outer diameter of the large-diameter portion 7172 is larger than the outer diameter of the insertion portion 7171 and larger than the inner diameter of the hole portion 87.

[0185] Detailed structure of the hole

[0186] like Figure 15 As shown, the hole 87 has a protrusion 871 that protrudes from the inner surface of the hole 87 toward the center of the hole 87 and an opposing portion 872.

[0187] The protrusion 871 has a first inclined surface 871A and a second inclined surface 871B.

[0188] The first inclined surface 871A is a surface in the protrusion 871 facing the +Y direction, which is inclined in such a way that it approaches the central axis of the hole 87 as it faces the -Y direction.

[0189] The second inclined surface 871B is a surface in the protrusion 871 facing the -Y direction, which is inclined in such a way that it approaches the central axis of the hole 87 as it faces the +Y direction.

[0190] That is, the hole 87 is formed into a shape that shrinks and then expands as it faces the +Y direction.

[0191] The opposing portion 872 corresponds to the second opposing portion of the retaining member 8. The opposing portion 872 is the portion of the inner surface of the hole 87 facing the +Z direction. That is, the opposing portion 872 is located on the surface facing the +Z direction in the protrusion 871. When the pin 717 is inserted into the hole 87, the opposing portion 872 is opposed to the opposing portion 718 located in the insertion portion 7171 in the +Z direction.

[0192] Installation process of light emitting component relative to base

[0193] The installation process of the light emitting component 6 relative to the base 71 is illustrated by the following process, for example. Furthermore, in the following description, the angle conversion body 63 is assumed to be bonded and fixed to the light guide body 61.

[0194] First, a light guide 61 is arranged in the first storage section 711, and an angle conversion body 63 is arranged in the second storage section 712. The light emitting component 6 is positioned relative to the base 71 using a positioning fixture (not shown).

[0195] Next, the second force-applying components 73A and 73B are installed in the first recess 713 and the second recess 714 of the base 71, and the light guide 61 disposed in the first storage part 711 is temporarily fixed.

[0196] Then, after removing the positioning fixture, the retaining member 8 is installed on the angle converter 63 such that each contact area 638 of the angle converter 63 contacts the contact portion 85. At this time, the retaining member 8 is placed in the second storage portion 712 by inserting the pin 717 into the hole portion 87 of the retaining member 8.

[0197] Then, a first force-applying member 72 is disposed on the placement section 715 of the base 71, and a pressure is applied to the reflective member 62 on the second end face 616. As a result, the angle conversion body 63 is pressed against the light-emitting member 6 in the +Z direction of the holding member 8, thus applying force to the light-emitting member 6.

[0198] Next, the temporarily fixed second force-applying components 73A and 73B are fixed to the first recess 713 and the second recess 714.

[0199] Then, as Figure 15 As shown by the dashed line, adhesive AB is injected into the hole 87 of the retaining member 8, where the pin 717 is inserted, along the inclined surface 881 of the first wall portion 88. This adhesive bonds the pin 717 to the inner surface of the hole 87, thereby fixing the retaining member 8 to the second storage portion 712. Thus, the retaining member 8 is fixed to the second storage portion 712 while the angle conversion body 63, which is subjected to a force in the +Z direction by the first force-applying member 72, is in close contact with the contact portion 85 of the retaining member 8.

[0200] In this embodiment, adhesive AB is injected into the first opposing portion 718 (facing the -Z direction) of the pin 717 and the second opposing portion 872 (facing the +Z direction) of the inner surface of the hole 87. Thus, adhesive AB is injected into the gap CL between the opposing portions 718 and 872, positioned relative to the opposing portion 718 in the -Z direction, opposite to the force application direction of the first force-applying member 72. Consequently, the gap CL is filled with adhesive AB, enabling stable bonding and fixation of the opposing portions 718 and 872.

[0201] Furthermore, preferably, the adhesive AB is injected not only between the opposing portion 718 and the opposing portion 872, but also between the pin 717 and the first wall portion 88, and between the pin 717 and the second wall portion 89. In this case, at least one of the first wall portion 88 and the second wall portion 89 can be bonded and fixed to the pin 717. This improves the bonding strength between the pin 717 and the retaining member 8, thereby improving the bonding strength between the base 71 and the retaining member 8, and firmly fixing the retaining member 8 to the base 71.

[0202] Effects of the first embodiment

[0203] The projector 1 described above in this embodiment achieves the following effects.

[0204] The projector 1 includes: a light source device 3; a light modulation device 27 that modulates the light emitted from the light source device 3; and a projection optical device 29 that projects the light modulated by the light modulation device 27.

[0205] The light source device 3 has a light-emitting element 521, a light guide 61, an angle conversion element 63, a base 71, and a holding component 8.

[0206] The light guide 61 has a first side surface 611 extending in the +Z direction, a first end surface 615 intersecting the first side surface 611 and facing the +Z direction, and a second end surface 616 intersecting the first side surface 611 and facing the -Z direction. The +Z direction corresponds to the first direction, and the -Z direction corresponds to the direction opposite to the first direction. An angle converter 63 engages with the first end surface 615 to convert the angle of light emitted from the first end surface 615. The angle converter 63 has a light-passing portion 630 and a flange portion 637.

[0207] The light-passing part 630 is the part through which light incident from the light guide 61 passes.

[0208] The flange portion 637 is such that it protrudes from the light-passing portion 630 into the ±X and ±Y directions that intersect the +Z direction, and the fluorescence YL incident from the light guide 61 onto the angle converter 63 does not pass through this portion.

[0209] The light-emitting element 521 emits light to the first side 611.

[0210] A light guide 61 and a holding member 8 are disposed on a base 71. The base 71 has an opposing portion 718, which serves as a first opposing portion.

[0211] The angle conversion body 63 contacts the holding member 8 in the +Z direction. The holding member 8 has a contact portion 85 and an opposing portion 872.

[0212] The flange portion 637 contacts the contact portion 85 along the +Z direction.

[0213] Opposing part 872 corresponds to the second opposing part. Opposing part 872 is opposite to opposing part 718 in the +Z direction.

[0214] The retaining component 8 and the base 71 are fixed together by an adhesive AB that fills the gap CL between the opposing part 718 and the opposing part 872.

[0215] According to this structure, a gap CL is provided between the opposing portions 718 and 872 in the +Z direction to adjust the posture of the retaining member 8, so that one of the flange portion 637 and the contact portion 85 is in contact with each other in the +Z direction without tilting relative to the other. The gap CL is filled with adhesive AB, and the retaining member 8 is fixed to the base 71.

[0216] Therefore, even if there is an adhesion deviation between the light guide 61 and the angle converter 63, the gap CL between the opposing portion 718 and the opposing portion 872 can absorb the adhesion deviation, thus ensuring proper contact between the flange portion 637 and the contact portion 85. Furthermore, since the gap CL is filled with the adhesive AB that fixes the retaining member 8 and the base 71, proper contact between the flange portion 637 and the contact portion 85 can be maintained. Therefore, rotational stress acting on the angle converter 63 centered on an axis perpendicular to the +Z direction can be suppressed, thus preventing one of the light guide 61 and the angle converter 63 from peeling off relative to the other.

[0217] In the light source device 3, the contact portion 85 contacts the flange portion 637 at the following positions: the position where the optical axis Ax of the angle converter 63 is sandwiched in the +Y direction perpendicular to the +Z direction; and the position where the optical axis Ax of the angle converter 63 is sandwiched in the +X direction perpendicular to both the +Z and +Y directions. Specifically, the contact portion 85 contacts contact areas 638A, 638C, and 638B, 638D in the flange portion 637 where the optical axis Ax of the angle converter 63 is sandwiched in the +Y direction perpendicular to the +Z direction, and also contacts contact areas 638A, 638B, 638C, 638D where the optical axis Ax of the angle converter 63 is sandwiched in the +X direction perpendicular to both the +Z and +Y directions. Furthermore, the +Y direction corresponds to the second direction, and the +X direction corresponds to the third direction.

[0218] With this structure, the flange 637 can contact the contact portion 85 at at least three points along the optical axis Ax of the angle converter 63. Therefore, the rotational stress acting on the angle converter 63 can be effectively suppressed. Thus, peeling of one of the light guide 61 and the angle converter 63 relative to the other can be effectively suppressed.

[0219] In the light source device 3, one of the base 71 and the holding member 8 has a pin, and the other has a hole for inserting the pin along the +Y direction, which intersects the +Z direction.

[0220] In this embodiment, the base 71 has a pin 717, and the retaining member 8 has a hole 87. A first opposing portion 718 is provided on the pin 717, and a second opposing portion 872 is provided on the inner surface of the hole 87.

[0221] With this structure, not only can the opposing portions 718 and 872 be easily positioned opposite each other in the +Z direction, but the retaining member 8 can also be easily positioned relative to the base 71. Therefore, the retaining member 8 can be easily fixed to the base 71.

[0222] Furthermore, if the base 71 has a hole and the retaining member 8 has a pin, the first opposing portion may be provided on the inner surface of the hole, and the second opposing portion may be provided on the pin. In this case, the same effect as described above can be achieved.

[0223] In the light source device 3, the base 71 has a pin 717 with an opposing portion 718. The retaining member 8 has a hole 87 with an opposing portion 872 on its inner surface.

[0224] With this structure, compared to the case where the retaining member 8 fixed to the base 71 has a pin, when the pin 717 is inserted into the hole 87 to align the retaining member 8 with the base 71, it is possible to prevent the hole 87, to which adhesive AB is injected, from being covered by the retaining member 8. That is, even after the pin 717 is inserted into the hole 87, the hole 87 can still be exposed. Therefore, adhesive AB can be easily injected into the hole 87, thus simplifying the bonding process of the retaining member 8 relative to the base 71.

[0225] In the light source device 3, multiple pins 717 are provided, and multiple holes 87 are provided corresponding to the multiple pins 717. The multiple pins 717 are separated from each other in the +X direction, which intersects the +Z direction and the +Y direction respectively. The +X direction is equivalent to a third direction that is perpendicular to the first direction and the second direction respectively.

[0226] With this structure, rotation of the retaining member 8 about the central axis of the pin 717 can be suppressed. Therefore, the retaining member 8 can be fixed to the base 71 with high precision.

[0227] In the light source device 3, the holding member 8 has: a first wall portion 88 that protrudes from the periphery of the hole portion 87 in the +Y direction and is opposite to the pin 717; and a second wall portion 89 that protrudes from the periphery of the hole portion 87 in the -Y direction and is opposite to the pin 717.

[0228] The adhesive AB is disposed between the opposing portion 718 and the opposing portion 872, and between the pin 717 and at least one of the first wall portion 88 and the second wall portion 89.

[0229] With this structure, the contact area between the adhesive AB and the pin 717 can be increased, as can the contact area between the adhesive AB and the retaining member 8. Furthermore, with the first wall portion 88 provided, it is possible to prevent the adhesive AB from overflowing from the hole portion 87 to the outside of the hole portion 87.

[0230] In the light source device 3, the first wall portion 88 has an inclined surface 881 that approaches the pin 717 as it moves toward the -Y direction.

[0231] With this structure, when adhesive AB is injected into the hole 87 from the +Y direction, which is the insertion direction of pin 717 relative to hole 87, adhesive AB can be easily injected into the hole 87 by injecting adhesive AB along inclined surface 881.

[0232] In the light source device 3, the retaining member 8 has a protrusion 871 provided on the inner surface of the hole 87 and protruding toward the pin 717.

[0233] With this structure, the dimension between the inner surface of the hole 87 and the pin 717 can be reduced compared to the case without the protrusion 871. As a result, in addition to reducing the amount of adhesive AB used to bond the pin 717 and the inner surface of the hole 87, the adhesive AB can also be easily retained inside the hole 87.

[0234] In the light source device 3, the pin 717 has: an insertion portion 7171, which is located in the +Y direction and is inserted into the hole portion 87; and a large-diameter portion 7172, which is located in the -Y direction relative to the insertion portion 7171 and has an outer diameter larger than the outer diameter of the insertion portion 7171.

[0235] With this structure, pin 717 is configured as a stepped pin. Therefore, pin 717 can be easily inserted into hole 87, thus easily positioning retaining member 8 relative to base 71. Furthermore, leakage of adhesive AB injected into hole 87 in the -Y direction can be prevented.

[0236] The light source device 3 includes: a reflecting member 62 that reflects light emitted from the second end face 616 back to the second end face 616; and a first force-applying member 72 that applies force to the reflecting member 62 on the second end face 616. The adhesive AB is disposed in the -Z direction relative to the opposing portion 718, which serves as the first opposing portion. With this structure, the reflecting member 62 is forced against the second end face 616 by the first force-applying member 72. Therefore, in addition to suppressing the air layer between the second end face 616 and the reflecting member 62, it is also possible to maintain the state in which the reflecting member 62 returns light emitted from the second end face 616 back into the light guide 61. This increases the amount of fluorescent YL emitted from the first end face 615.

[0237] Furthermore, the force exerted by the first force-applying member 72 on the reflective member 62 also acts on the angle conversion body 63, which is in contact with the retaining member 8. That is, the angle conversion body 63 is subjected to force toward the retaining member 8. Moreover, by positioning the adhesive AB relative to the opposing portion 718 in the -Z direction, a force that compresses the adhesive AB in the +Z direction is continuously applied. Therefore, compared to the case where the adhesive AB is positioned relative to the opposing portion 718 in the +Z direction, the adhesive state between the opposing portion 718 and the opposing portion 872 can be maintained more easily, thereby easily maintaining the adhesive state between the base 71 and the retaining member 8.

[0238] The light source device 3 includes a second force-applying member 73 that applies force to the light guide 61 toward the base 71 in a direction perpendicular to the +Z direction, i.e., the -Y direction. The force of the first force-applying member 72 is greater than the value obtained by multiplying the number of second force-applying members 73, the friction of the light guide 61, and the force of the second force-applying member 73.

[0239] With this structure, forces are applied to the light guide 61 in both the +Z and -Y directions. Therefore, even if an impact such as a falling object is applied to the light source device 3, the position of the light guide 61 can be suppressed from shifting in the base 71.

[0240] Furthermore, the force exerted on the light guide 61 in the +Z direction is greater than the force exerted on the light guide 61 in the -Y direction. Therefore, the contact state between the flange portion 637 of the angle conversion body 63 and the contact portion 85 of the retaining member 8 can be maintained.

[0241] In the light source device 3, the light guide 61 contains a phosphor that converts the wavelength of light incident from the light-emitting element 521. That is, the light guide 61 contains a phosphor that converts the wavelength of the excitation light EL incident from the light-emitting element 521.

[0242] According to this structure, a fluorescent YL with a wavelength different from the excitation light EL emitted from the light-emitting element 521 can be emitted from the light source device.

[0243] Implementation Method 2

[0244] Next, the second embodiment of this disclosure will be described.

[0245] The projector according to this embodiment has the same structure as the projector according to the first embodiment, but the difference is that a hemispherical protrusion is provided at the contact portion of the holding member. Furthermore, in the following description, parts that are the same as or substantially the same as those already described are marked with the same reference numerals and their descriptions are omitted.

[0246] Schematic structure of projector and light source device

[0247] Figure 16 This is a diagram obtained by viewing the holding member 8A of the projector involved in this embodiment from the -Z direction.

[0248] The projector involved in this embodiment, in addition to having Figure 16Except for the retention member 8A shown, which replaces the retention member 8, the light source device of this embodiment has the same structure and function as the projector 1 according to the first embodiment. That is, except for the retention member 8A replacing the retention member 8, the light source device according to this embodiment has the same structure and function as the light source device 3 according to the first embodiment.

[0249] Maintain the structure of the components

[0250] The retaining member 8A, except that it has a retaining portion 82A instead of a retaining portion 82, has the same structure and function as the retaining member 8 according to the first embodiment. That is, the retaining member 8A has an opening 81, a retaining portion 82A, and a mounting portion 86. Furthermore, the retaining portion 82A has a pair of recesses 83 and a plurality of contact portions 85, as well as a plurality of curved surfaces 851. In addition, Figure 16 The retaining member 8A shown does not have a pair of positioning portions 84, but it is not limited thereto. The retaining member 8A according to this embodiment may also have a pair of positioning portions 84.

[0251] Multiple curved surfaces 851 protrude in the -Z direction from corresponding contact portions 85 among multiple contact portions 85. In other words, each of the multiple contact portions 85 has a corresponding curved surface 851 among the multiple curved surfaces 851.

[0252] Multiple curved surfaces 851 are respectively provided in the contact portion 85 in the -Z direction, and are formed into a generally hemispherical shape with the cross-sectional area decreasing as it moves toward the -Z direction. The contact area 638 of the angle conversion body 63 contacts the -Z direction end of each curved surface 851 from the -Z direction.

[0253] Effects of the second implementation method

[0254] In addition to having the same effect as the projector 1 described in the first embodiment, the projector described above can also have the following effects.

[0255] In the light source device according to this embodiment, the contact portion 85 of the holding member 8A has a curved surface portion 851, which protrudes in a hemispherical shape in the -Z direction and contacts the surface 637A in the flange portion 637 in the +Z direction. The -Z direction is the opposite direction to the first direction.

[0256] Based on this structure, even when the surface 637A of the flange portion 637 facing the +Z direction and the contact portion 85 are in contact, the surface 637A and the contact portion 85 can be easily made to contact, compared to the case where the surface 637A intersects the +Z direction.

[0257] Variations of the implementation method

[0258] This disclosure is not limited to the above-described embodiments; variations and improvements within the scope of achieving the purpose of this disclosure are included in this disclosure.

[0259] In the above embodiments, the flange portion 637 of the angle converter 63 contacts the four contact portions 85 of the holding member 8 in the +Z direction within the four contact areas 638. However, it is not limited to this; the flange portion 637 only needs to contact at least three of the four contact portions 85. In this case, it is preferable that the triangle connecting the three contact portions 85 that contact the flange portion 637 includes an intersection point with the optical axis Ax.

[0260] In the above embodiments, the base 71 has a pin 717, and the retaining member 8 has a hole 87. Furthermore, the portion of the pin 717 facing the -Z direction is the opposing portion 718, which serves as the first opposing portion, and the portion of the inner surface of the hole 87 facing the +Z direction is the opposing portion 872, which serves as the second opposing portion opposite to the first opposing portion. However, this is not a limitation; the first opposing portion may also be the portion of the base 71 facing the -Z direction in a structure other than the pin 717, and the second opposing portion may also be the portion of the retaining member 8 facing the +Z direction in a structure other than the hole 87. In this case, the base 71 may not have the pin 717, and the retaining member 8 may not have the hole 87 for inserting the pin 717.

[0261] Alternatively, as described above, the base 71 may have a hole, and the retaining member 8 may have a pin that is inserted into the hole.

[0262] In the above embodiments, the base 71 has two pins 717, and the retaining member 8 has two holes 87 for inserting the pins 717. However, it is not limited to this, the base 71 may also have one or more pins 717, and the retaining member 8 may also have the same number of holes 87 as the number of pins 717.

[0263] The same applies to the case where the base 71 has a hole and the retaining component 8 has a pin.

[0264] In the above embodiments, the retaining member 8 includes a first wall portion 88 and a second wall portion 89. However, it is not limited to this, and at least one of the first wall portion 88 and the second wall portion 89 may not be present. In addition, even when the retaining member 8 includes the first wall portion 88 and the second wall portion 89, each wall portion 88, 89 and the pin 717 may not be fixed by adhesive AB.

[0265] Furthermore, the first wall portion 88 has an inclined surface 881. However, it is not limited to this, and the first wall portion 88 may also not have an inclined surface 881.

[0266] In the above embodiments, pin 717 is a stepped pin having an insertion portion 7171 and a large-diameter portion 7172. However, it is not limited to this, pin 717 may also be a generally cylindrical pin formed such that the area of ​​the cross-section perpendicular to the central axis of pin 717 does not change.

[0267] In the above embodiments, the light source device 3 includes a first force-applying member 72 that applies force to the reflective member 62 on the second end face 616. However, it is not limited to this, and the first force-applying member 72 may not be present. In this case, the reflective member 62 may also be bonded and fixed to the second end face 616.

[0268] In the embodiments described above, the adhesive AB is disposed in the -Z direction relative to the opposing portion 718, which serves as the first opposing portion. However, it is not limited to this, and the adhesive AB may also be disposed in a manner that surrounds the pin 717.

[0269] In the above embodiments, a second applying force member 73 is provided to press and apply force to the light guide 61 disposed in the first storage portion 711 from the +Y direction. The second applying force member 73 includes a second applying force member 73A and a second applying force member 73B that are separated from each other in the +Z direction. However, it is not limited to this. As long as the light guide 61 can be stored in the first storage portion 711, the second applying force member 73 may not be required. In addition, the second applying force member 73 for applying force to the light guide 61 is not limited to two; it may be one or more.

[0270] In the above embodiments, the force exerted by the first force-applying component 72 is greater than the value obtained by multiplying the number of second force-applying components 73, the frictional force of the light guide 61, and the force exerted by the second force-applying component 73. However, it is not limited to this; the force exerted by the first force-applying component 72 may also be less than the value obtained by multiplying the number of second force-applying components 73, the frictional force of the light guide 61, and the force exerted by the second force-applying component 73.

[0271] In the embodiments described above, the light guide 61 contains a phosphor that converts the wavelength of the incident excitation light EL. However, it is not limited to this, and the light guide 61 may not contain a phosphor. In this case, the light source device 3 can be configured as a light source device that focuses and emits light emitted from a plurality of light-emitting elements 521.

[0272] In the above embodiments, the projector includes three optical modulation devices 27R, 27G, and 27B. However, it is not limited thereto, and this disclosure can also be applied to projectors having two or fewer or four or more optical modulation devices.

[0273] In the above embodiments, the image projection device 2 includes, according to Figure 1The optical components are arranged in the layout shown above. However, the optical components included in the image projection device 2 are not limited to those described above, nor is the arrangement of the optical components limited to those described above.

[0274] In the above embodiments, the light modulation device 27 has a transmissive liquid crystal panel with different light incident and light exit surfaces. However, it is not limited to this; the light modulation device 27 may also have a reflective liquid crystal panel with the same light incident and light exit surfaces. In addition, as long as the light modulation device is capable of modulating the incident light beam to form image light corresponding to image information, it may also use a light modulation device other than liquid crystal, such as a device utilizing a micromirror, for example, a device utilizing a DMD (Digital Micromirror Device).

[0275] In the above embodiments, examples of applying the light source device according to this disclosure to a projector 1 are given. However, it is not limited thereto. For example, in addition to being used alone, the light source device according to this disclosure can also be used in electronic devices other than projectors, such as lighting fixtures and headlights of automobiles.

[0276] This is a summary of the disclosure.

[0277] The following is a summary published in this note.

[0278] Postscript 1

[0279] A light source device, characterized in that it comprises: a light guide having a side surface extending along a first direction, a first end surface intersecting the side surface and facing the first direction, and a second end surface intersecting the side surface and facing a direction opposite to the first direction; an angle converter engaging with the first end surface to convert the angle of light emitted from the first end surface; a light-emitting element emitting light toward the side surface; a holding member having the angle converter in contact with the holding member in the first direction; and a base having the light guide and the holding member disposed on the base, the angle converter having: a light transmission... The light guide has a light-passing portion through which light incident from the light guide passes; and a flange portion that protrudes from the light-passing portion in a direction intersecting the first direction, wherein light incident from the light guide to the angle converter does not pass through the flange portion. The base has a first opposing portion, and the retaining member has: a contact portion, wherein the flange portion contacts the contact portion along the first direction; and a second opposing portion, which opposes the first opposing portion in the first direction. The retaining member and the base are fixed together by an adhesive that fills the gap between the first opposing portion and the second opposing portion.

[0280] According to this structure, a gap is provided between the second opposing portion of the retaining member and the first opposing portion of the base, which are opposite each other in the first direction, to adjust the posture of the retaining member, so that one of the flange portion of the angle converter and the contact portion of the retaining member are in contact with each other along the first direction without tilting relative to the other. The gap is filled with adhesive, and the retaining member and the base are fixed.

[0281] Therefore, even if there is an adhesion deviation between the light guide and the angle converter, the gap between the first and second opposing portions can absorb the adhesion deviation, thus ensuring proper contact between the flange of the angle converter and the contact portion of the retaining member. Furthermore, since this gap is filled with adhesive that secures the retaining member and the base, proper contact between the flange and the contact portion is maintained. Therefore, rotational stress acting on the angle converter centered on an axis perpendicular to the first direction can be suppressed, thus preventing the light guide and the angle converter from peeling off relative to each other.

[0282] Appendix 2

[0283] According to Appendix 1, the light source device is characterized in that the contact portion contacts the flange portion at the following positions: a position where the optical axis of the angle converter is sandwiched in a second direction perpendicular to the first direction; and a position where the optical axis of the angle converter is sandwiched in a third direction perpendicular to both the first and second directions.

[0284] With this structure, the flange can contact the contact portion at at least three points along the optical axis that sandwiches the angle converter. Therefore, the rotational stress acting on the angle converter can be effectively suppressed. Thus, peeling of one of the light guide and the angle converter relative to the other can be effectively suppressed.

[0285] Appendix 3

[0286] According to Appendix 1 or 2, the light source device is characterized in that one of the base and the retaining member has a pin, and the other of the base and the retaining member has a hole for the pin to be inserted in a second direction perpendicular to the first direction. When the base has the pin and the retaining member has the hole, the first opposing portion is provided on the pin, and the second opposing portion is provided on the inner surface of the hole.

[0287] With this structure, not only can the first opposing portion and the second opposing portion be easily opposed in the first direction, but the retaining member can also be easily positioned relative to the base. Therefore, the retaining member can be easily fixed to the base.

[0288] Appendix 4

[0289] According to Appendix 3, the light source device is characterized in that the base has the pin having the first opposing portion, and the retaining member has the hole having the second opposing portion on its inner surface.

[0290] With this structure, compared to the case where the retaining member fixed to the base has a pin, when the pin is inserted into the hole to align the retaining member with the base, the hole to which adhesive is injected can be prevented from being covered by the retaining member. That is, the hole can be exposed even after the pin is inserted into it. Therefore, adhesive can be easily injected into the hole, thus simplifying the bonding process of the retaining member relative to the base.

[0291] Appendix 5

[0292] According to Appendix 3 or 4, the light source device is characterized in that a plurality of pins are provided, a plurality of holes are provided corresponding to the plurality of pins, and the plurality of pins are separated from each other in a third direction that is perpendicular to the first direction and the second direction respectively.

[0293] This structure prevents the retaining component from rotating around the central axis of the pin. Therefore, the retaining component can be fixed to the base with high precision.

[0294] Appendix 6

[0295] The light source device according to any one of Appendices 3 to 5 is characterized in that the retaining member has: a first wall portion that protrudes from around the hole in a second direction and is opposite to the pin; and a second wall portion that protrudes from around the hole in a direction opposite to the second direction and is opposite to the pin, wherein the adhesive is disposed between the first opposing portion and the second opposing portion, and between the pin and at least one of the first wall portion and the second wall portion.

[0296] This structure increases the contact area between the adhesive and the pin, and also increases the contact area between the adhesive and the retaining member. Furthermore, the presence of the first wall portion prevents adhesive from overflowing from the hole to the outside of the hole.

[0297] Appendix 7

[0298] According to the light source device described in Appendix 6, the first wall portion has an inclined surface that approaches the pin in a direction opposite to the second direction.

[0299] With this structure, when adhesive is injected into the hole from the insertion direction of the pin relative to the hole, it is easy to inject the adhesive into the hole by injecting the adhesive along the inclined surface.

[0300] Postscript 8

[0301] The light source device according to any one of Appendices 3 to 7 is characterized in that the retaining member has a protrusion disposed on the inner surface of the hole and protruding toward the pin.

[0302] With this structure, the dimension between the inner surface of the hole and the pin can be reduced compared to the case without the protrusion. Therefore, in addition to reducing the amount of adhesive needed to bond the pin and the inner surface of the hole, the adhesive can be easily retained within the hole.

[0303] Postscript 9

[0304] The light source device according to any one of Appendices 3 to 8 is characterized in that the pin has: an insertion portion located in the second direction and inserted into the hole portion; and a large-diameter portion located in the opposite direction to the second direction relative to the insertion portion and having an outer diameter larger than the outer diameter of the insertion portion.

[0305] With this structure, the pin is configured as a stepped pin. This allows for easy insertion of the pin into the hole, thus facilitating easy positioning of the retaining component relative to the base. Furthermore, it prevents the adhesive injected into the hole from leaking out in the direction opposite to the second direction.

[0306] Postscript 10

[0307] The light source device according to any one of Appendices 1 to 9 is characterized in that the light source device comprises: a reflecting member that reflects light emitted from the second end face toward the second end face; and a first force-applying member that applies force to the reflecting member toward the second end face, wherein the adhesive is disposed in a direction opposite to the first direction relative to the first opposing portion.

[0308] With this structure, the reflective component is forced against the second end face by the first force-applying component. Therefore, in addition to suppressing the air layer between the second end face and the reflective component, it is also possible to maintain the state in which the reflective component returns the light emitted from the second end face to the light guide body. As a result, the amount of light emitted from the first end face can be increased.

[0309] Furthermore, the force exerted by the first force-applying member on the reflective member also acts on the angle conversion body that contacts the retaining member. Moreover, by positioning the adhesive relative to the first opposing portion in a direction opposite to the first direction, a force that compresses the adhesive in the first direction is continuously applied. Therefore, compared to the case where the adhesive is positioned relative to the first opposing portion in the first direction, the adhesion between the first opposing portion and the second opposing portion can be easily maintained, thereby easily maintaining the adhesion between the base and the retaining member.

[0310] Postscript 11

[0311] According to the light source device described in Appendix 10, the light source device is characterized in that it includes a second force-applying member that applies force to the light guide body on the base in a direction perpendicular to the first direction, and the force of the first force-applying member is greater than the value obtained by multiplying the number of the second force-applying members, the frictional force of the light guide body, and the force of the second force-applying member.

[0312] Based on this structure, forces are applied to the light guide in the first direction and the aforementioned vertical direction, respectively. Therefore, even if an impact such as a falling object is applied to the light source device, the position of the light guide can be suppressed from shifting in the base.

[0313] Furthermore, the force exerted on the light guide in the first direction is greater than the force exerted on the light guide in the aforementioned vertical direction. Therefore, the contact state between the flange of the angle conversion body and the contact portion of the holding member can be maintained.

[0314] Postscript 12

[0315] The light source device according to any one of Appendices 1 to 11 is characterized in that the contact portion has a curved surface that protrudes hemispherically in a direction opposite to the first direction and contacts the surface of the flange portion facing the first direction.

[0316] With this structure, even when the surface of the flange facing the first direction is in contact with the contact portion, it is possible to easily make the surface and the contact portion in contact, compared to the case where the surface intersects the first direction.

[0317] Postscript 13

[0318] The light source device according to any one of Appendices 1 to 12 is characterized in that the light guide contains a phosphor that converts the wavelength of light incident from the light-emitting element.

[0319] With this structure, light with a wavelength different from that emitted from the light-emitting element can be emitted from the light source device.

[0320] Postscript 14

[0321] A projector, characterized in that it comprises: a light source device as described in any one of Appendices 1 to 13; a light modulation device for modulating light emitted from the light source device; and a projection optics device for projecting light modulated by the light modulation device.

[0322] Based on this structure, it can achieve the same effect as the aforementioned light source device.

Claims

1. A light source device, characterized in that, have: A light guide having a side surface extending along a first direction, a first end face intersecting the side surface and facing the first direction, and a second end face intersecting the side surface and facing a direction opposite to the first direction; An angle converter, which engages with the first end face, converts the angle of light emitted from the first end face; A light-emitting element that emits light toward the side; The retaining member, wherein the angle conversion body contacts the retaining member in the first direction; and The base, the light guide, and the holding member are disposed on the base. The angle conversion body has: Light passing through the light guide, light incident from the light guide passes through the light passing ... A flange portion protrudes from the light-passing portion in a direction intersecting the first direction, so that light incident from the light guide onto the angle converter does not pass through the flange portion. The base has a first opposing portion. The retaining component has: The contact portion, wherein the flange portion contacts the contact portion along the first direction; and The second opposing portion is opposite to the first opposing portion in the first direction. The retaining component and the base are fixed together by an adhesive that fills the gap between the first opposing portion and the second opposing portion.

2. The light source device according to claim 1, characterized in that, The contact portion contacts the flange portion at the following positions: a position where the optical axis of the angle converter is sandwiched in a second direction perpendicular to the first direction; and a position where the optical axis of the angle converter is sandwiched in a third direction perpendicular to both the first and second directions.

3. The light source device according to claim 1, characterized in that, One of the base and the retaining member has a pin. The other of the base and the retaining member has a hole for the pin to be inserted in a second direction perpendicular to the first direction. When the base has the pin and the retaining member has the hole, the first opposing portion is provided on the pin, and the second opposing portion is provided on the inner surface of the hole. When the base has the hole and the retaining member has the pin, the first opposing portion is provided on the inner surface of the hole, and the second opposing portion is provided on the pin.

4. The light source device according to claim 3, characterized in that, The base has the pin with the first opposing portion. The retaining member has a hole on its inner surface where the second opposing portion is provided.

5. The light source device according to claim 3, characterized in that, The pins are provided in multiple quantities. The hole portion is provided in multiple ways corresponding to the multiple pins. The plurality of pins are separated from each other in a third direction that is perpendicular to the first direction and the second direction, respectively.

6. The light source device according to any one of claims 3 to 5, characterized in that, The retaining component has: A first wall portion, which protrudes from around the hole in a second direction, opposite the pin; and The second wall portion protrudes from around the hole in a direction opposite to the second direction, and is opposite to the pin. The adhesive is disposed between the first opposing portion and the second opposing portion, and between the pin and at least one of the first wall portion and the second wall portion.

7. The light source device according to claim 6, characterized in that, The first wall portion has an inclined surface that approaches the pin in a direction opposite to the second direction.

8. The light source device according to any one of claims 3 to 5, characterized in that, The retaining member has a protrusion located on the inner surface of the hole and protruding toward the pin.

9. The light source device according to any one of claims 3 to 5, characterized in that, The pin has: An insertion portion, located in the second direction, is inserted into the hole portion; and The large-diameter portion, which is located in the opposite direction to the second direction relative to the insertion portion, has an outer diameter larger than that of the insertion portion.

10. The light source device according to any one of claims 1 to 5, characterized in that, The light source device includes: A reflective component that reflects light emitted from the second end face back to the second end face; and The first force-applying component applies force to the second end face of the reflective component. The adhesive is disposed in a direction opposite to the first opposing portion relative to the first direction.

11. The light source device according to claim 10, characterized in that, The light source device includes a second force-applying component, which applies force to the light guide body on the base in a direction perpendicular to the first direction. The force exerted by the first force-applying component is greater than the value obtained by multiplying the number of the second force-applying components, the frictional force of the light guide, and the force exerted by the second force-applying component.

12. The light source device according to any one of claims 1 to 5, characterized in that, The contact portion has a curved surface that protrudes hemispherically in a direction opposite to the first direction and contacts the surface of the flange portion facing the first direction.

13. The light source device according to any one of claims 1 to 5, characterized in that, The light guide contains a phosphor that converts the wavelength of light incident from the light-emitting element.

14. A projector, characterized in that, have: The light source device according to any one of claims 1 to 5; A light modulation device that modulates light emitted from the light source device; and A projection optical device that projects light modulated by the light modulation device.

Images