Light source device and projector

Abstract

To provide a light source device and a projector having high light utilization efficiency.SOLUTION: A light source device of the present invention comprises: a light source unit having first and second light emitting devices, a substrate, and first and second metal wires; a light guide member on which light from the light source is incident; and a support member that has a support groove. The light guide member has a first surface emitting light, a second surface opposite to the first surface, third and fourth surfaces facing opposite to each other, and fifth and sixth surfaces facing opposite to each other. The light source unit causes the light emitting devices to face the third surface. The support groove has a support surface facing the fourth surface and supporting the light guide member and a first wall surface separated from the fifth surface. When an axis orthogonal to a first axis is defined as a second axis, and an axis orthogonal to the first axis and the second axis as a third axis, and in plan view in a direction along the third axis, the light emitting devices each have a rectangular outer shape, and an outer peripheral sides of the light emitting devices intersect the first and second axes. First and second wiring terminals are located between the fifth surface and the first wall surface. The first wall surface extends toward the light source unit beyond the third surface of the light guide member.SELECTED DRAWING: Figure 7

Description

[Technical Field]

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

[0002] As a light source device for use in a projector, a light source device that utilizes fluorescence emitted from a phosphor when the phosphor is irradiated with excitation light emitted from a light-emitting element has been proposed. Patent Document 1 listed below discloses a light source device that includes an excitation light source having multiple light-emitting elements mounted on a circuit board, a phosphor rod that converts the excitation light emitted from each light-emitting element of the excitation light source into fluorescence, and a holder that holds the phosphor rod. Conventionally, when multiple light-emitting elements are mounted on a circuit board, a wire-like metal wire is used as a means for electrically connecting the circuit board and the light-emitting elements. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2020 / 254455 Summary of the Invention [Problem to be solved by the invention]

[0004] When the light source device of Patent Document 1 uses the above-mentioned metal wire, it is necessary to arrange the holder and the circuit board in a spaced-apart state so that the metal wire and the holder do not come into contact with each other. As a result, there is a risk that light emitted from the light-emitting element or light emitted from the light-emitting element and reflected without being incident on the phosphor rod will leak out from the gap between the circuit board and the upper surface of the holder, reducing light utilization efficiency. [Means for solving the problem]

[0005] In order to solve the above-described problems, a light source device according to one aspect of the present invention includes a light source unit having first and second light-emitting elements that emit light, a substrate on which the first light-emitting elements and the second light-emitting elements are mounted and arranged along a first axis, a first metal wire that electrically connects the first light-emitting element to a first wiring terminal of the substrate, and a second metal wire that electrically connects the second light-emitting element to a second wiring terminal of the substrate, a light-guiding member that has an elongated shape along the first axis and into which the light emitted from the first light-emitting element and the second light-emitting element is incident, and a support member that supports the light-guiding member, wherein the light-guiding member has a first surface that emits light, a second surface that is located on the opposite side to the first surface in a direction along the first axis, third and fourth surfaces that intersect with the first and second surfaces, respectively, and are located opposite to each other, and intersect with the first and second surfaces, and the third and fourth surfaces, and the light source unit is arranged so that the first light-emitting element and the second light-emitting element face the third surface of the light-guiding member; the support member has a support surface that faces the fourth surface and supports the light-guiding member, and a first side wall that intersects the support surface and is spaced apart from the fifth surface of the light-guiding member; when an axis orthogonal to the first axis in the third surface is defined as a second axis and an axis orthogonal to the first axis and the second axis is defined as a third axis, the first light-emitting element and the second light-emitting element each have a rectangular outer shape when viewed in a plane in a direction along the third axis, and the outer peripheries of the first light-emitting element and the second light-emitting element intersect the first axis and the second axis; the first wiring terminal and the second wiring terminal of the substrate are located between the fifth surface and the first side wall; and when viewed in a plane in a direction along the first axis, the first side wall extends further toward the light source unit than the third surface of the light-guiding member.

[0006] A projector according to one aspect of the present invention comprises a light source device according to one aspect of the present invention, an optical modulation device that modulates light emitted from the light source device in accordance with image information, and a projection optical device that projects the light modulated by the optical modulation device. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a projector according to an embodiment. [Figure 2] FIG. 2 is a schematic diagram illustrating the configuration of a first lighting device. [Figure 3] FIG. 2 is a plan view showing a schematic configuration of a light source unit. [Figure 4] 10A and 10B are diagrams comparing states with and without rotation of the light-emitting element. [Figure 5] FIG. 10 is a plan view of the support member as viewed from the Y-axis direction. [Figure 6] 2 is a plan view showing the main configuration of the light source device as seen from the Y-axis direction. FIG. [Figure 7] FIG. 7 is a cross-sectional view of the light source device taken along line VII-VII in FIG. [Figure 8] FIG. 10 is a cross-sectional view showing the configuration of a light source device of a comparative example. [Figure 9] FIG. 10 is a cross-sectional view of a light source device according to a first modified example. [Figure 10] FIG. 10 is a plan view of the light source device of the second modified example as viewed from the Y-axis direction. DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the present invention will be described below. The projector of this embodiment is an example of a projector that uses a liquid crystal panel as a light modulation device. In the drawings below, the dimensions of some components may be shown on different scales to make them easier to see.

[0009] FIG. 1 is a diagram showing a schematic configuration of a projector 1 according to this embodiment. 1, the projector 1 of this embodiment is a projection-type image display device that displays a color image on a screen SCR, which is a projection surface. The projector 1 is equipped with three light modulation devices corresponding to red light LR, green light LG, and blue light LB.

[0010] The projector 1 includes a first illumination device 20, a second illumination device 21, a color separation optical system 3, a light modulation device 4R, a light modulation device 4G, a light modulation device 4B, a light combining element 5, and a projection optical device 6.

[0011] The first illumination device 20 emits yellow fluorescence Y toward the color separation optical system 3. The second illumination device 21 emits blue light LB toward the light modulation device 4B. Detailed configurations of the first illumination device 20 and the second illumination device 21 will be described later.

[0012] In the following, the drawings will be described using an XYZ Cartesian coordinate system as necessary. The Z axis is an axis along the top and bottom of the projector 1. The X axis is an axis parallel to the optical axis AX1 of the first illumination device 20 and the optical axis AX2 of the second illumination device 21. The Y axis is an axis perpendicular to the X and Z axes. The optical axis AX1 of the first illumination device 20 is the central axis of the fluorescent light Y emitted from the first illumination device 20. The optical axis AX2 of the second illumination device 21 is the central axis of the blue light LB emitted from the second illumination device 21. One direction along the X axis is referred to as the +X direction, and the opposite direction is referred to as the -X direction. One direction along the Y axis is referred to as the +Y direction, and the opposite direction is referred to as the -Y direction. One direction along the Z axis is referred to as the +Z direction, and the opposite direction is referred to as the -Z direction. In addition, the two directions along the X axis are collectively referred to as the X-axis direction without distinction, the two directions along the Y axis are collectively referred to as the Y-axis direction without distinction, and the two directions along the Z axis are collectively referred to as the Z-axis direction without distinction.

[0013] The color separation optical system 3 separates the yellow fluorescence Y emitted from the first illumination device 20 into red light LR and green light LG. The color separation optical system 3 includes a dichroic mirror 7, a first reflecting mirror 8a, and a second reflecting mirror 8b.

[0014] The dichroic mirror 7 separates the fluorescence Y into red light LR and green light LG. The dichroic mirror 7 transmits the red light LR and reflects the green light LG. The second reflecting mirror 8b is disposed in the optical path of the green light LG. The second reflecting mirror 8b reflects the green light LG reflected by the dichroic mirror 7 toward the optical modulation device 4G. The first reflecting mirror 8a is disposed in the optical path of the red light LR. The first reflecting mirror 8a reflects the red light LR transmitted by the dichroic mirror 7 toward the optical modulation device 4R.

[0015] On the other hand, the blue light LB emitted from the second illumination device 21 is reflected by the reflecting mirror 9 toward the light modulation device 4B.

[0016] The second illumination device 21 includes a second light source 81, a condenser lens 82, a diffuser plate 83, a rod lens 84, and a relay lens 85. The second light source 81 is configured with at least one semiconductor laser. The second light source 81 emits blue light LB made of laser light. Note that the second light source 81 is not limited to a semiconductor laser, and may be configured with an LED that emits blue light.

[0017] The condenser lens 82 is composed of a convex lens. The condenser lens 82 causes the blue light LB emitted from the second light source 81 to enter the diffuser plate 83 in a substantially condensed state. The diffuser plate 83 diffuses the blue light LB emitted from the condenser lens 82 with a predetermined degree of diffusion, generating blue light LB having a substantially uniform luminous intensity distribution similar to that of the fluorescent light Y emitted from the first lighting device 20. The diffuser plate 83 may be, for example, frosted glass made of optical glass.

[0018] The blue light LB diffused by the diffuser plate 83 is incident on the rod lens 84. The rod lens 84 has a rectangular columnar shape extending along the optical axis AX2 of the second illumination device 21. The rod lens 84 has a light incident end surface 84a at one end and a light exit end surface 84b at the other end. The diffuser plate 83 is fixed to the light incident end surface 84a of the rod lens 84 via an optical adhesive (not shown). It is desirable that the refractive index of the diffuser plate 83 and the refractive index of the rod lens 84 match as closely as possible.

[0019] The blue light LB propagates through the rod lens 84 while being totally reflected inside the rod lens 84, and is emitted from the light emitting end surface 84b with an increased uniformity of illuminance distribution. The blue light LB emitted from the rod lens 84 is incident on the relay lens 85. The relay lens 85 causes the blue light LB, whose uniformity of illuminance distribution has been increased by the rod lens 84, to be incident on the reflecting mirror 9.

[0020] The shape of the light exit end surface 84b of the rod lens 84 is a rectangle that is approximately similar to the shape of the image forming area of ​​the light modulation device 4B, so that the blue light LB exiting from the rod lens 84 is efficiently incident on the image forming area of ​​the light modulation device 4B.

[0021] The light modulation device 4R modulates the red light LR according to image information to form image light corresponding to the red light LR. The light modulation device 4G modulates the green light LG according to image information to form image light corresponding to the green light LG. The light modulation device 4B modulates the blue light LB according to image information to form image light corresponding to the blue light LB.

[0022] Each of the light modulation devices 4R, 4G, and 4B uses, for example, a transmissive liquid crystal panel. Polarizing plates (not shown) are disposed on the entrance and exit sides of the liquid crystal panels. The polarizing plates allow only linearly polarized light in a specific direction to pass through.

[0023] A field lens 10R is disposed on the incident side of the optical modulation device 4R. A field lens 10G is disposed on the incident side of the optical modulation device 4G. A field lens 10B is disposed on the incident side of the optical modulation device 4B. The field lens 10R collimates the chief ray of the red light LR incident on the optical modulation device 4R. The field lens 10G collimates the chief ray of the green light LG incident on the optical modulation device 4G. The field lens 10B collimates the chief ray of the blue light LB incident on the optical modulation device 4B.

[0024] The light combining element 5 receives the image lights emitted from the light modulation device 4R, the light modulation device 4G, and the light modulation device 4B, combines the image lights corresponding to the red light LR, the green light LG, and the blue light LB, and emits the combined image light toward the projection optical device 6. The light combining element 5 may be, for example, a cross dichroic prism.

[0025] The projection optical device 6 is composed of a plurality of projection lenses. The projection optical device 6 enlarges and projects the image light combined by the light combining element 5 onto the screen SCR, thereby displaying a color image on the screen SCR.

[0026] Next, the configuration of the first illumination device 20 will be described. FIG. 2 is a schematic diagram of the first illumination device 20. As shown in FIG. As shown in FIG. 2, the first illumination device 20 includes a light source device 100, a collimating optical system 63, an integrator optical system 80, a polarization conversion element 102, and a superimposing optical system 103.

[0027] The light source device 100 includes a wavelength conversion member 50, a light source unit 70, an angle conversion member 52, a mirror 53, a support member 54, a position restriction unit 65, and a pair of pressing members 90. The wavelength conversion member 50 of this embodiment corresponds to the "light guide member" in the claims.

[0028] The wavelength conversion member 50 has a quadrangular prism shape extending along the X-axis and has six faces. The side of the wavelength conversion member 50 extending along the X-axis is longer than the side extending along the Y-axis and the side extending along the Z-axis. Therefore, the X-axis corresponds to the longitudinal direction of the wavelength conversion member 50. The length of the side extending along the Y-axis is equal to the length of the side extending along the Z-axis. That is, the cross-sectional shape of the wavelength conversion member 50 cut along a YZ plane perpendicular to the X-axis is a square. Note that the cross-sectional shape of the wavelength conversion member 50 cut along a YZ plane may also be rectangular. In this embodiment, the X-axis corresponds to the "first axis" in the claims, the Y-axis corresponds to the "third axis" in the claims, and the Z-axis corresponds to the "second axis" in the claims.

[0029] The wavelength conversion member 50 has a first surface 50a and a second surface 50b, a third surface 50c and a fourth surface 50d, and a fifth surface 50e and a sixth surface 50f. The first surface 50a and the second surface 50b intersect with the X axis along the longitudinal direction of the wavelength conversion member 50 and are located on opposite sides of the X axis. In this embodiment, the first surface 50a is located on the +X side, which is one side of the X axis direction along the X axis, and the second surface 50b is located on the -X side, which is the opposite side of the X axis direction.

[0030] The third surface 50c and the fourth surface 50d intersect with the first surface 50a and the second surface 50b, respectively, and intersect with the X-axis along the longitudinal direction of the wavelength conversion member 50. In this embodiment, the third surface 50c is located on the -Y side, which is one side of the Y-axis direction along the Y-axis, and the fourth surface 50d is located on the +Y side, which is the other side of the Y-axis direction.

[0031] The fifth surface 50e and the sixth surface 50f intersect with the first surface 50a and the second surface 50b, respectively, and with the third surface 50c and the fourth surface 50d, respectively, and intersect with the X-axis and the Y-axis, and in this embodiment, are located on opposite sides of each other along the perpendicular Z-axis. In this embodiment, the fifth surface 50e is located in the +Z direction, which is one side of the Z-axis direction, and the sixth surface 50f is located in the −Z direction, which is the other side of the Z-axis direction.

[0032] In the following description, when the third surface 50c, the fourth surface 50d, the fifth surface 50e, and the sixth surface 50f are not to be distinguished from each other, they may be simply referred to as side surfaces 50c, 50d, 50e, and 50f.

[0033] The wavelength conversion member 50 contains at least a phosphor and converts excitation light E having a first wavelength band emitted from the light source unit 70 into fluorescence Y having a second wavelength band different from the first wavelength band. The excitation light E enters the wavelength conversion member 50 from the third surface 50c. The fluorescence Y is guided inside the wavelength conversion member 50 and then emitted from the first surface 50a. The excitation light E in this embodiment corresponds to the "first light" in the claims. The fluorescence Y in this embodiment corresponds to the "second light" in the claims.

[0034] The wavelength conversion member 50 contains a ceramic phosphor made of a polycrystalline phosphor that converts the wavelength of the excitation light E into the fluorescent light Y. The second waveband of the fluorescent light Y is, for example, a yellow waveband of 490 to 750 nm. That is, the fluorescent light Y is yellow fluorescence containing a red light component and a green light component.

[0035] The wavelength conversion member 50 may contain a single crystal phosphor instead of a polycrystalline phosphor. Alternatively, the wavelength conversion member 50 may be made of fluorescent glass. Alternatively, the wavelength conversion member 50 may be made of a material in which a large number of phosphor particles are dispersed in a binder made of glass or resin. A wavelength conversion member 50 made of such a material converts the excitation light E into fluorescent light Y.

[0036] Specifically, the material of the wavelength conversion member 50 includes, for example, an yttrium-aluminum-garnet (YAG) phosphor. Taking YAG:Ce containing cerium (Ce) as an activator as an example, the material of the wavelength conversion member 50 may be a material obtained by mixing raw material powders containing constituent elements such as Y2O3, Al2O3, and CeO3 and causing a solid-phase reaction; Y-Al-O amorphous particles obtained by a wet method such as a coprecipitation method or a sol-gel method; or YAG particles obtained by a gas-phase method such as a spray-drying method, a flame pyrolysis method, or a thermal plasma method.

[0037] The light source unit 70 includes a substrate 71 and a plurality of light emitting elements 72. The substrate 71 includes a front surface 71a and a back surface 71b opposite to the front surface 71a. The plurality of light emitting elements 72 are provided on a surface 71a of the substrate 71. The light source unit 70 of this embodiment has four light emitting elements 72, but the number of light emitting elements 72 is not particularly limited.

[0038] Each light-emitting element 72 has a light-emitting surface 72a that faces the third surface 50c of the wavelength converting member 50 and emits excitation light E of a first wavelength band toward the third surface 50c. The first wavelength band is, for example, a wavelength band from blue to violet, ranging from 400 nm to 480 nm, and has a peak wavelength of, for example, 445 nm. In this way, each light-emitting element 72 of the light source section 70 is arranged so that the light-emitting surface 72a faces the third surface 50c, which is one of the four side surfaces 50c, 50d, 50e, and 50f along the longitudinal direction of the wavelength conversion member 50.

[0039] 3 is a plan view showing a schematic configuration of the light source section 70. FIG. 3 is a plan view of a surface 71a of a substrate 71 of the light source section 70. 3, the substrate 71 has a substantially rectangular shape. The light emitting elements 72 are arranged on a surface 71a of the substrate 71 along the X-axis direction.

[0040] Each light-emitting element 72 is formed, for example, by a light-emitting diode (LED) and has the same structure. Each light-emitting element 72 has a light-emitting surface 72a, two anode electrodes 72b, and one cathode electrode 72c. In each light-emitting element 72, the light-emitting surface 72a and the two anode electrodes 72b are provided on the surface facing away from the substrate 71, and the cathode electrode 72c is provided on the back surface facing the substrate 71, opposite the surface. In this embodiment, each light-emitting element 72 has two anode electrodes 72b on either side of the light-emitting surface 72a. This stabilizes the current density supplied to the light-emitting surface 72a, allowing the light-emitting surface 72a to emit uniform light. Therefore, each light-emitting element 72 can emit uniform, bright light from the light-emitting surface 72a.

[0041] Terminal portions 73 electrically connected to the respective light-emitting elements 72 are provided on the surface 71a of the substrate 71. The terminal portions 73 include a first conductive portion 75 electrically connected to the anode electrode 72b of each light-emitting element 72 and a second conductive portion 76 electrically connected to the cathode electrode 72c of each light-emitting element 72. The first conductive portion 75 and the second conductive portion 76 are configured to connect the plurality of light-emitting elements 72 in series. Therefore, a current flows sequentially along the X-axis direction between the first light-emitting element 11, the second light-emitting element 12, the third light-emitting element 13, and the fourth light-emitting element 14.

[0042] Specifically, each anode electrode 72b of each light-emitting element 72 is connected to a first conductive portion 75 of the terminal portion 73 via a metal wire 74. The metal wire 74 is provided using a wire bonding device. Each light-emitting element 72 is mounted in an orientation such that the cathode electrode 72c is placed on the second conductive portion 76 of the terminal portion 73. A solder layer, for example, is provided between the cathode electrode 72c and the second conductive portion 76. The terminal portion 73 is connected to a wiring portion not shown, and the plurality of light-emitting elements 72 are electrically connected to an external device via the plurality of metal wires 74, the terminal portion 73 and the wiring portion, so that driving power, etc. can be supplied. In this way, each light emitting element 72 can simply and accurately establish electrical continuity between the substrate 71 and the light emitting element 72 via the metal wire 74 .

[0043] When viewed in a plan view in the Y-axis direction along the normal to the surface 71a of the substrate 71, each light-emitting element 72 has the same rectangular shape, which in this embodiment is a square shape. The four outer peripheries 72L of each light-emitting element 72 do not extend along the X-axis or Z-axis, but intersect with the X-axis and Z-axis. In other words, each light-emitting element 72 is arranged in a rotated state around a central axis C. The central axis C is an axis along the Y-axis direction that passes through the center of the light-emitting surface 72a.

[0044] Each light-emitting element 72 is arranged rotated in the same direction and by the same angle around the central axis C. The rotation angle of each light-emitting element 72 is preferably set to, for example, 20° to 40°, and more preferably set to 25° to 35°.

[0045] Here, if the rotation angle is greater than 40°, the proportion of one light-emitting element 72 in the X-axis direction along the longitudinal direction of the wavelength conversion member 50 increases. As a result, fewer light-emitting elements 72 can be arranged in the X-axis direction, which may reduce the amount of emitted excitation light E. Furthermore, if the rotation angle is less than 20°, the metal wire and the support member 54 may come into contact with each other due to being arranged close to each other. In this embodiment, when the surface 71a of the substrate 71 is viewed from above, the light-emitting elements 72 are arranged rotated clockwise by 30° around the central axis C. With this configuration, the arrangement space for the light-emitting elements 72 on the substrate 71 can be reduced.

[0046] Here, the difference between when the light emitting element 72 is rotated and when it is not rotated will be described.

[0047] Fig. 4 is a diagram comparing the states with and without rotation of the light emitting element 72. In Fig. 4, the state in which the light emitting element 72 is rotated is shown by a solid line, and the state in which the light emitting element 72 is not rotated is shown by a two-dot chain line. 4, in the light-emitting element 72, one of the pair of anode electrodes 72b is located on the −Z side of the central axis C, and the other of the pair of anode electrodes 72b is located on the +Z side of the central axis C. Therefore, when the light-emitting element 72 is rotated around the central axis C, one of the pair of anode electrodes 72b rotates clockwise around the central axis C, and the other of the pair of anode electrodes 72b rotates counterclockwise around the central axis C. Therefore, the pair of anode electrodes 72b each move closer to the central axis C in the Z-axis direction. In other words, when the light-emitting element 72 is rotated, the pair of anode electrodes 72b can be positioned closer to the center of the substrate 71 in the Z-axis direction compared to a configuration in which the light-emitting element 72 is not rotated. Therefore, the distance d between the anode electrodes 72b in the Z-axis direction when the light-emitting element 72 is rotated is shorter than the distance d1 between the anode electrodes 72b in the Z-axis direction when the light-emitting element 72 is not rotated.

[0048] In the light source unit 70 of this embodiment, the anode electrode 72b is positioned closer to the center of the substrate 71, and therefore it is possible to employ a structure in which the first conductive portions 75 of the terminal portion 73 connected to the anode electrode 72b are also positioned closer to the center of the substrate 71. In other words, the distance between the first conductive portions 75 in the Z-axis direction can be made shorter compared to when the light emitting element 72 is not rotated.

[0049] In this specification, the multiple light-emitting elements 72 arranged in the X-axis direction on the substrate 71 are referred to as the first light-emitting element 11, the second light-emitting element 12, the third light-emitting element 13, and the fourth light-emitting element 14. In Figures 2 and 3, the first light-emitting element 11, the second light-emitting element 12, the third light-emitting element 13, and the fourth light-emitting element 14 are arranged in this order from the -X side to the +X side.

[0050] The first conductive portion 75 includes a plurality of wiring terminals electrically connected to the anode electrodes 72b of the first light-emitting element 11, the second light-emitting element 12, the third light-emitting element 13, and the fourth light-emitting element 14. The plurality of wiring terminals include a first wiring terminal 75a, a second wiring terminal 75b, a third wiring terminal 75c, and a fourth wiring terminal 75d.

[0051] The first wiring terminals 75a are arranged on both sides of the first light-emitting element 11 in the Z-axis direction. The second wiring terminals 75b are arranged on both sides of the second light-emitting element 12 in the Z-axis direction. The third wiring terminals 75c are arranged on both sides of the third light-emitting element 13 in the Z-axis direction. The fourth wiring terminals 75d are arranged on both sides of the fourth light-emitting element 14 in the Z-axis direction.

[0052] The plurality of metal lines 74 include a first metal line 74a, a second metal line 74b, a third metal line 74c, and a fourth metal line 74d. The first metal wire 74 a electrically connects the anode electrode 11 b of the first light emitting element 11 and the first wiring terminal 75 a of the substrate 71 . The second metal wire 74b electrically connects the anode electrode 12b of the second light-emitting element 12 and the second wiring terminal 75b of the substrate 71. The third metal wire 74c electrically connects the anode electrode 13b of the third light emitting element 13 and the third wiring terminal 75c of the substrate 71. The fourth metal wire 74d electrically connects the anode electrode 14b of the fourth light-emitting element 14 and the fourth wiring terminal 75d of the substrate 71.

[0053] Returning to Figure 2, the light source unit 70 is arranged with respect to the support member 54 so that multiple light-emitting elements 72, including the first light-emitting element 11 and the second light-emitting element 12, face the third surface 50c of the wavelength conversion member 50. The support member 54 extends in the X-axis direction along the longitudinal direction of the wavelength conversion member 50, and has support grooves 154 that support the wavelength conversion member 50. The support member 54 diffuses and releases heat generated by the wavelength conversion member 50 supported in the support grooves 154 to the outside. For this reason, it is desirable that the support member 54 be made of a material that has a predetermined strength and high thermal conductivity. As the material for the support member 54, for example, metal such as aluminum or stainless steel is used, and in particular, it is desirable to use an aluminum alloy such as a 6061 series.

[0054] The wavelength conversion member 50 of this embodiment includes a first protrusion 151 that protrudes from the support groove 154 in the +X direction, and a second protrusion 152 that protrudes from the support groove 154 in the -X direction. In other words, a part of the wavelength conversion member 50 of this embodiment protrudes outside the support groove 154. The position restricting portion 65 holds the first protruding portion 151 and the second protruding portion 152 of the wavelength converting member 50. The position restricting portion 65, together with the pair of pressing members 90, restricts the position of the wavelength converting member 50 relative to the supporting member .

[0055] The pair of pressing members 90 are disposed opposite the support surfaces 154s of the support groove 154. As a result, the pair of pressing members 90 restrict movement of the wavelength conversion member 50 in the Y-axis direction within the support groove 154. The pair of pressing members 90 are made of an elastically deformable material. As an example, the pair of pressing members 90 are made of leaf springs made of a metal material, for example, a stainless steel material such as SUS304.

[0056] The pair of pressing members 90 are disposed between the wavelength conversion member 50 and the substrate 71, and press the wavelength conversion member 50 against the support surfaces 154s of the support grooves 154 of the support member 54. The pair of pressing members 90 are fixed to the support member 54. The pair of pressing members 90 are disposed so as to overlap with gaps provided in the light emitting elements 72 aligned in the X-axis direction in a plan view. Therefore, the pair of pressing members 90 do not overlap with the light emitting surfaces 72a of the light emitting elements, and do not block the excitation light E emitted from the light emitting elements 72.

[0057] The mirror 53 is provided on the second surface 50b of the wavelength conversion member 50. The mirror 53 guides light inside the wavelength conversion member 50 and reflects the fluorescence Y that reaches the second surface 50b. The mirror 53 is made of a metal film or a dielectric multilayer film formed on the second surface 50b of the wavelength conversion member 50.

[0058] In the first lighting device 20, when excitation light E emitted from the light source unit 70 enters the wavelength conversion member 50, phosphors contained within the wavelength conversion member 50 are excited, and fluorescence Y is emitted from any light-emitting point. The fluorescence Y travels in all directions from any light-emitting point, but the fluorescence Y traveling toward the four side surfaces 50c, 50d, 50e, and 50f travels toward the first surface 50a or the second surface 50b while repeatedly undergoing total reflection at multiple locations on the side surfaces 50c, 50d, 50e, and 50f. The first surface 50a emits the fluorescence Y that has been guided through the wavelength conversion member 50 by propagation due to total reflection. In this embodiment, the fluorescence Y traveling toward the first surface 50a enters the angle conversion member 52 provided on the first surface 50a. The fluorescence Y traveling toward the second surface 50b is reflected by the mirror 53 and travels toward the first surface 50a.

[0059] Of the excitation light E incident on the wavelength conversion member 50, a portion of the excitation light E that is not used to excite the phosphor is reflected by the members surrounding the wavelength conversion member 50, including the light source unit 70, or by the mirror 53 provided on the second surface 50b. Therefore, a portion of the excitation light E is trapped inside the wavelength conversion member 50 and reused for fluorescence conversion.

[0060] The angle conversion member 52 is provided on the first surface 50a of the wavelength conversion member 50. The angle conversion member 52 is formed, for example, from a tapered rod. The angle conversion member 52 has a light incident surface 52a on which the fluorescence Y emitted from the wavelength conversion member 50 is incident, a light exit surface 52b from which the fluorescence Y exits, and a side surface 52c that reflects the incident fluorescence Y toward the light exit surface 52b.

[0061] The angle conversion member 52 has a truncated quadrangular pyramid shape, and the cross-sectional area perpendicular to the optical axis J expands along the direction in which light travels. Therefore, the area of ​​the light exit surface 52b is larger than the area of ​​the light incident surface 52a. The optical axis J of the angle conversion member 52 is an axis that passes through the centers of the light exit surface 52b and the light incident surface 52a and is parallel to the X-axis. The optical axis J of the angle conversion member 52 coincides with the optical axis AX1 of the first lighting device 20.

[0062] The fluorescence Y that has entered the angle conversion member 52 changes direction each time it is totally reflected by the side surface 52c while traveling inside the angle conversion member 52 so that it approaches a direction parallel to the optical axis J. In this way, the angle conversion member 52 converts the emission angle distribution of the fluorescence Y that is emitted from the first surface 50a of the wavelength conversion member 50. Specifically, the angle conversion member 52 makes the maximum emission angle of the fluorescence Y on the light emission surface 52b smaller than the maximum incidence angle of the fluorescence Y on the light incidence surface 52a.

[0063] Generally, the etendue of light, which is defined as the product of the area of ​​the light exit region and the maximum exit angle, which is the solid angle of the light, is preserved, and therefore the etendue of the fluorescence Y is preserved both before and after passing through the angle conversion member 52. As described above, the angle conversion member 52 has a configuration in which the area of ​​the light exit surface 52b is larger than the area of ​​the light incident surface 52a. Therefore, from the standpoint of etendue preservation, the angle conversion member 52 can make the maximum exit angle of the fluorescence Y on the light exit surface 52b smaller than the maximum incident angle of the fluorescence Y on the light incident surface 52a.

[0064] The angle conversion member 52 is fixed to the wavelength conversion member 50 via an optical adhesive (not shown) so that the light incident surface 52a faces the first surface 50a of the wavelength conversion member 50. That is, the angle conversion member 52 and the wavelength conversion member 50 are in contact with each other via the optical adhesive, and no gap, such as an air layer, is provided between the angle conversion member 52 and the wavelength conversion member 50. If a gap were provided between the angle conversion member 52 and the wavelength conversion member 50, the fluorescence Y that reaches the light incident surface 52a of the angle conversion member 52 and that is incident on the light incident surface 52a at an angle equal to or greater than the critical angle would be totally reflected by the light incident surface 52a and would not be able to enter the angle conversion member 52. In contrast, if no gap is provided between the angle conversion member 52 and the wavelength conversion member 50, as in this embodiment, the loss component of the fluorescence Y that cannot enter the angle conversion member 52 due to total reflection can be reduced. From this perspective, it is desirable to match the refractive index of the angle conversion member 52 with the refractive index of the wavelength conversion member 50 as closely as possible.

[0065] A compound parabolic concentrator (CPC) may be used as the angle conversion member 52 instead of a tapered rod. Even when a CPC is used as the angle conversion member 52, the same effect as when a tapered rod is used can be obtained. Note that the light source device 100 does not necessarily have to include the angle conversion member 52.

[0066] The collimating optical system 63 is composed of a collimator lens and the like, and is provided between the light source device 100 and the integrator optical system 80. The collimating optical system 63 further narrows the angular distribution of the fluorescence Y emitted from the light source device 100, and causes the highly parallel fluorescence Y to enter the integrator optical system 80. Note that the collimating optical system 63 does not need to be provided if the parallelism of the fluorescence Y emitted from the angle conversion member 52 is sufficiently high.

[0067] The integrator optical system 80 has a first lens array 61 and a second lens array 101. The integrator optical system 80, together with the superimposing optical system 103, functions as a uniform illumination optical system that uniformizes the intensity distribution of the fluorescence Y emitted from the light source device 100 in each of the light modulation devices 4R and 4G, which are the illuminated areas. The fluorescence Y emitted from the collimating optical system 63 is incident on the first lens array 61. The first lens array 61, together with the second lens array 101 provided downstream of the light source device 100, constitutes the integrator optical system 80.

[0068] The first lens array 61 has a plurality of first small lenses 61a. The plurality of first small lenses 61a are arranged in a matrix in a plane parallel to the YZ plane, which is orthogonal to the optical axis AX1 of the first illumination device 20. The plurality of first small lenses 61a split the fluorescence Y emitted from the angle conversion member 52 into a plurality of partial beams. The shape of each of the first small lenses 61a is rectangular, which is approximately similar to the shape of the image formation areas of the light modulation devices 4R and 4G. This allows each of the partial beams emitted from the first lens array 61 to efficiently enter the image formation areas of the light modulation devices 4R and 4G.

[0069] The fluorescence Y emitted from the first lens array 61 travels toward the second lens array 101. The second lens array 101 is disposed opposite the first lens array 61. The second lens array 101 has a plurality of second small lenses 101a corresponding to the plurality of first small lenses 61a of the first lens array 61. The second lens array 101, together with the superimposing optical system 103, forms images of the plurality of first small lenses 61a of the first lens array 61 near the image forming areas of the light modulation devices 4R, 4G. The plurality of second small lenses 101a are arranged in a matrix in a plane parallel to the YZ plane that is perpendicular to the optical axis AX1 of the first illumination device 20.

[0070] In this embodiment, the first small lenses 61a of the first lens array 61 and the second small lenses 101a of the second lens array 101 have the same size, but may have different sizes. Also, in this embodiment, the first small lenses 61a of the first lens array 61 and the second small lenses 101a of the second lens array 101 are arranged so that their optical axes coincide with each other, but they may be arranged eccentrically with each other.

[0071] The polarization conversion element 102 converts the polarization direction of the fluorescence Y emitted from the second lens array 101. Specifically, the polarization conversion element 102 converts each partial light beam of the fluorescence Y split by the first lens array 61 and emitted from the second lens array 101 into linearly polarized light.

[0072] The polarization conversion element 102 has a polarization separation layer (not shown) that transmits one linearly polarized component of the polarization components contained in the fluorescence Y emitted from the light source device 100 as is and reflects the other linearly polarized component in a direction perpendicular to the optical axis AX1, a reflection layer (not shown) that reflects the other linearly polarized component reflected by the polarization separation layer in a direction parallel to the optical axis AX1, and a retardation plate (not shown) that converts the other linearly polarized component reflected by the reflection layer into one linearly polarized component.

[0073] The fluorescence Y that has passed through the polarization conversion element 102 enters the superimposing optical system 103. The superimposing optical system 103 cooperates with the integrator optical system 80 to form a uniform illumination optical system that uniforms the intensity distribution of the fluorescence Y in each of the light modulation devices 4R and 4G, which are the illuminated regions.

[0074] Fig. 5 is a plan view of the support member 54 as viewed from the Y-axis direction. Fig. 6 is a plan view showing the main configuration of the light source device 100 as viewed from the Y-axis direction. In Fig. 6, for ease of viewing, only the first light-emitting element 11 and the second light-emitting element 12 are shown among the components of the light source unit 70.

[0075] As shown in FIG. 5, the support member 54 has a support groove 154, a spring fixing portion 540, a first accommodating portion 541, a second accommodating portion 542, a third accommodating portion 543, a fourth accommodating portion 544, a fifth accommodating portion 545, and a sixth accommodating portion 546, and is a plate-like member having a rectangular planar shape.

[0076] 6, the four outer peripheries 11L of the first light-emitting element 11 do not extend along the X-axis or the Z-axis but intersect with the X-axis and the Z-axis. Similarly, the four outer peripheries 12L of the second light-emitting element 12 do not extend along the X-axis or the Z-axis but intersect with the X-axis and the Z-axis. In other words, the first light-emitting element 11 and the second light-emitting element 12 are arranged in a rotated state around the central axis C.

[0077] In the present embodiment, at least a portion of the anode electrode 11b of the first light-emitting element 11 to which the first metal wire 74a is connected, and at least a portion of the anode electrode 12b of the second light-emitting element 12 to which the second metal wire 74b is connected, overlap with the wavelength conversion member 50. With this configuration, the first light-emitting element 11 and the second light-emitting element 12 are arranged in a sufficiently rotated state, and therefore, a configuration can be realized in which the distance in the Z-axis direction of the first conductive portion 75 connected to each anode electrode 11b, 12b is shortened as shown in FIG. In this embodiment, the anode electrode 11b of the first light-emitting element 11 corresponds to the "first electrode" in the claims, and the anode electrode 12b of the second light-emitting element 12 corresponds to the "second electrode" in the claims.

[0078] Fig. 7 is a cross-sectional view of the light source device 100 taken along line VII-VII in Fig. 6. Note that in Fig. 7, the position regulating portion 65 and the pressing member 90 are omitted for ease of viewing. As shown in FIG. 7, the support groove 154 of the support member 54 has a U-shaped cross section perpendicular to the X-axis direction.

[0079] The support member 54 includes a bottom wall 140, a first side wall 141, and a second side wall 142. The bottom wall 140 has a support surface 154s that forms the bottom surface of the support groove 154. In the present embodiment, the support surface 154s is a surface parallel to the XZ plane, and supports the fourth surface 50d of the wavelength conversion member 50.

[0080] The first side wall 141 has a first wall surface 154a that forms one side surface of the support groove 154. The first wall surface 154a faces the fifth surface 50e of the wavelength conversion member 50 and is spaced apart from the fifth surface 50e. That is, a gap is provided between the first wall surface 154a and the fifth surface 50e of the wavelength conversion member 50. The first side wall 141 has a first apex 55 that forms the upper part of the support groove 154. A first apex surface 55a, which is the tip of the first apex 55, is a surface parallel to the XZ plane and is the surface farthest from the support surface 154s in the Y-axis direction.

[0081] The second side wall 142 has a second wall surface 154b that forms the other side surface of the support groove 154. The second wall surface 154b faces the sixth surface 50f of the wavelength converting member 50 and is spaced apart from the sixth surface 50f. That is, a gap is provided between the second wall surface 154b and the sixth surface 50f of the wavelength converting member 50. The second side wall 142 has a second apex 57 that forms the upper part of the support groove 154. A second apex surface 57a, which is the tip of the second apex 57, is a surface parallel to the XZ plane and is the surface farthest from the support surface 154s in the Y-axis direction.

[0082] The support groove 154 of this embodiment has a support surface 154s, a first wall surface 154a, and a second wall surface 154b. When viewed in a plan view in the X-axis direction, the first side wall 141 and the second side wall 142 extend beyond the third surface 50c of the wavelength conversion member 50 toward the light source unit 70.

[0083] The first wall surface 154a has a first portion 54a1 located on the third surface 50c side and a second portion 54a2 located on the support surface 154s side. The first portion 54a1 extends perpendicular to the support surface 154s, i.e., parallel to the XY plane. The second portion 54a2 slopes toward the fifth surface 50e from the first portion 54a1 side toward the support surface 154s side. In other words, the distance between the second portion 54a2 on the support surface 154s side and the fifth surface 50e is shorter than the distance between the second portion 54a2 on the first portion 54a1 side and the fifth surface 50e.

[0084] The second wall surface 154b has a third portion 54b3 located on the third surface 50c side and a fourth portion 54b4 located on the support surface 154s side. The third portion 54b3 extends perpendicular to the support surface 154s, i.e., parallel to the XY plane. The fourth portion 54b4 is inclined toward the sixth surface 50f from the third portion 54b3 side toward the support surface 154s side. In other words, the distance between the fourth portion 54b4 and the sixth surface 50f on the support surface 154s side is shorter than the distance between the fourth portion 54b4 and the sixth surface 50f on the third portion 54b3 side.

[0085] Each of the first wall surface 154a and the second wall surface 154b is made of a metal surface, such as aluminum or stainless steel, which is the material of the support member 54. More specifically, each of the first wall surface 154a and the second wall surface 154b is made of a mirror-finished surface of the metal surface. Therefore, each of the first wall surface 154a and the second wall surface 154b has optical reflectivity and reflects the incident excitation light E. Note that each of the first wall surface 154a and the second wall surface 154b may be made of another metal film or a dielectric multilayer film formed on the surface of a metal, such as aluminum or stainless steel.

[0086] 6, the first wiring terminal 75a and the second wiring terminal 75b are located between the fifth surface 50e and the first wall surface 154a. The first wiring terminal 75a and the second wiring terminal 75b are also located between the sixth surface 50f and the second wall surface 154b of the second side wall 142. Although not shown in the figure, the third wiring terminal 75c and the fourth wiring terminal 75d are located between the fifth surface 50e and the first wall surface 154a of the first side wall 141, and the third wiring terminal 75c and the fourth wiring terminal 75d are located between the sixth surface 50f and the second wall surface 154b of the second side wall 142.

[0087] The first metal wires 74a are drawn out in the −X direction, in which the distance between the outer periphery 11L of the first light-emitting element 11 and the first wall surface 154a increases, and in the +X direction, in which the distance between the outer periphery 11L of the first light-emitting element 11 and the second wall surface 154b increases. In other words, the pair of first metal wires 74a are drawn out so as to be point-symmetric with respect to the central axis C of the first light-emitting element 11. This configuration makes it easier to ensure a space between the first metal wire 74a and the first wall surface 154a or the second wall surface 154b, thereby preventing contact between the first metal wire 74a and the first wall surface 154a or the second wall surface 154b. In addition, the length of the first metal wire 74a can be ensured to be sufficient.

[0088] In addition, the second metal wire 74b is drawn out in the -X direction, in which the distance between the outer periphery 12L of the second light-emitting element 12 and the first wall surface 154a increases, and in the +X direction, in which the distance between the outer periphery 12L of the second light-emitting element 12 and the second wall surface 154b increases. This configuration makes it easier to ensure a space between the second metal wire 74b and the first wall surface 154a or the second wall surface 154b, thereby preventing contact between the second metal wire 74b and the first wall surface 154a or the second wall surface 154b. In addition, the length of the second metal wire 74b can be ensured to be sufficient.

[0089] Although not shown in Figure 6, the same can be said for the direction in which the third metal wire 74c is drawn from the third light-emitting element 13 and the direction in which the fourth metal wire 74d is drawn from the fourth light-emitting element 14 as for the first metal wire 74a and the second metal wire 74b.

[0090] 7, in plan view in the X-axis direction, a portion of the first metal wire 74a is located closer to the wavelength conversion member 50 (+Y side) than an opening surface 154K of the support groove 154 in the support member 54. The opening surface 154K is an imaginary plane that includes the first top surface 55a and the second top surface 57a. That is, a portion of the first metal wire 74a is provided in a state where it is embedded in the support groove 154. With this configuration, the light source unit 70 and the support member 54 can be disposed in close proximity to each other. Therefore, the gap S between the substrate 71 and the top surfaces 55a, 57a of the first side wall 141 and the second side wall 142 of the support member 54 is reduced, and leakage of the excitation light E from the gap S can be reduced.

[0091] Furthermore, since the first metal wire 74a can be arranged in a loose state, excessive tension on the first metal wire 74a can be prevented, and stress on the connection portion with the first metal wire 74a can be reduced, thereby preventing connection failures caused by the first metal wire 74a.

[0092] 7, the same can be said for the second metal wire 74b, the third metal wire 74c, and the fourth metal wire 74d. That is, portions of the second metal wire 74b, the third metal wire 74c, and the fourth metal wire 74d are provided in a state where they are embedded in the support groove 154. Therefore, the second metal wire 74b, the third metal wire 74c, and the fourth metal wire 74d can be connected in a loosened state, which can prevent connection failures caused by the second metal wire 74b, the third metal wire 74c, and the fourth metal wire 74d.

[0093] Here, a light source device including a light source unit in which each light emitting element 72 is mounted on a substrate 71 without being rotated will be described as a comparative example. As described with reference to Fig. 4, in the light source unit for comparison in which the light emitting elements 72 are arranged without being rotated, the distance between the first conductive portions 75 in the Z-axis direction is greater than that of the light source unit 70 of this embodiment. Therefore, the length of the metal wire 74 in the Z-axis direction is longer than that of the light source unit 70 of this embodiment.

[0094] FIG. 8 is a cross-sectional view showing the configuration of a light source device 1000 of the comparative example. As shown in FIG. 8 , in the light source device 1000 of the comparative example, the metal wire 74 does not fit within the support groove 154 in the Z-axis direction, and the first and second apexes 55 and 57 of the support member 54 may come into contact with the metal wire 74. Therefore, in the light source device 1000 of the comparative example, it is necessary to lower the first and second apexes 55 and 57 to prevent the metal wire 74 from coming into contact with the first and second apexes 55 and 57. However, if the heights of the first and second apexes 55 and 57 are reduced, the gaps S1 between the top surfaces 55 a and 57 a of the first and second apexes 55 and 57 and the substrate 71 increase, and the excitation light E emitted from each light-emitting element 72 passes through the gaps S1 to the outside. This may reduce the amount of excitation light E incident on the wavelength conversion member 50.

[0095] In contrast, according to the light source device 100 of this embodiment, by arranging each light-emitting element 72 in a rotated state, the metal wire 74 is accommodated in the support groove 154 in the Z-axis direction, and the first top 55 and the second top 57 do not come into contact with the metal wire 74. Therefore, in the light source device 100 of this embodiment, the first top 55 and the second top 57 can be made higher than in the light source device 1000 of the comparative example, and the gap S between the top surfaces 55a, 57a of the first top 55 and the second top 57 and the substrate 71 can be made smaller. This makes it difficult for the excitation light E emitted from each light-emitting element 72 to be emitted to the outside through the gap S.

[0096] Returning to FIG. 7 , in the light source device 100 of this embodiment, the width D2 of the support surface 154s of the support member 54 along the Z axis direction is greater than the width B2 of the wavelength conversion member 50 along the Z axis direction. As a result, both ends of the support surface 154s in the Z axis direction protrude outside the fourth surface 50d of the wavelength conversion member 50. In other words, when the support surface 154s is viewed from the light-emitting surface 72a along the Y axis direction, a portion of the support surface 154s overlaps with the fourth surface 50d, and another portion of the support surface 154s is exposed outside the fourth surface 50d. In this way, the support surface 154s has an exposed portion 54r exposed outside the wavelength conversion member 50.

[0097] According to the light source device 100 of this embodiment, a portion of the excitation light E2 emitted from the light-emitting surface 72a of the light-emitting element 72 travels through the gap between the fifth surface 50e and the first portion 54a1 of the wavelength conversion member 50 and then enters the second portion 54a2 inclined with respect to the support surface 154s. At this time, the excitation light E2 is reflected by the second portion 54a2 and enters the fifth surface 50e of the wavelength conversion member 50. In this way, the excitation light E2 passing through the gap between the fifth surface 50e of the wavelength conversion member 50 and the first wall surface 154a is more likely to enter the fifth surface 50e, thereby reducing the amount of excitation light E reflected by the support surface 154s and returning to the light source unit 51. Furthermore, a portion of the excitation light E is reflected by the first portion 54a1 extending perpendicular to the support surface 154s and enters the fifth surface 50e of the wavelength conversion member 50. This makes it possible to realize a light source device 100 that has high utilization efficiency of the excitation light E and that makes it easy to obtain fluorescence Y with a desired intensity.

[0098] 5, the spring fixing portions 540 are arranged on both sides of the support groove 154 in the Z-axis direction along the short side of the wavelength conversion member 50. The spring fixing portions 540 fix, with screws 96, both ends of a pair of pressing members 90 arranged to straddle the wavelength conversion member 50 in the Z-axis direction.

[0099] The first accommodating portion 541 is a recess that communicates with the support groove 154 in the +X direction. The first accommodating portion 541 penetrates to the outer edge 54d of the support member 54. The first accommodating portion 541 accommodates the first protrusion 151 of the wavelength conversion member 50 that protrudes from the support groove 154. The first accommodating portion 541 also holds the angle conversion member 52 fixed to the first surface 50a of the wavelength conversion member 50. In this embodiment, the angle conversion member 52 fixed to the first surface 50a of the first protrusion 151 is held by the support member 54. The light exit surface 52b of the angle conversion member 52 housed in the first housing portion 541 is flush with the outer edge 54d of the support member 54 in a plan view.

[0100] The second accommodating portion 542 is a recess that communicates with the support groove 154 in the -X direction. The second accommodating portion 542 penetrates to the outer edge 54d of the support member 54. The second accommodating portion 542 accommodates the second protrusion 152 of the wavelength converting member 50 that protrudes from the support groove 154. The second accommodating portion 542 is provided in a state that does not communicate with the outer edge 54d of the support member 54. The second accommodating portion 542 accommodates the second protrusion 152 of the wavelength converting member 50 that protrudes from the support groove 154. In this embodiment, the mirror 53 is provided on the second surface 50b of the second protrusion 152. The second accommodating portion 542 accommodates the mirror 53 that is provided on the second surface 50b of the wavelength converting member 50.

[0101] The third accommodating portion 543 is a recess that communicates with the first accommodating portion 541 in the +Z direction. The third accommodating portion 543 accommodates the position restricting portion 65 that holds the +Z side of the first protrusion 151 of the wavelength converting member 50 accommodated in the first accommodating portion 541.

[0102] The fourth accommodating portion 544 is a recess that communicates with the first accommodating portion 541 in the -Z direction. The fourth accommodating portion 544 accommodates the position restricting portion 65 that holds the -Z side of the first protrusion 151 of the wavelength converting member 50 accommodated in the first accommodating portion 541.

[0103] The fifth accommodating portion 545 is a recess that communicates with the second accommodating portion 542 in the +Z direction. The fifth accommodating portion 545 accommodates the position restricting portion 65 that holds the +Z side of the second protrusion 152 of the wavelength converting member 50 accommodated in the second accommodating portion 542.

[0104] The sixth accommodating portion 546 is a recess that communicates with the third accommodating portion 543 in the -Z direction. The sixth accommodating portion 546 accommodates the position restricting portion 65 that holds the -Z side of the second protrusion 152 of the wavelength converting member 50 accommodated in the second accommodating portion 542.

[0105] The position restricting portion 65 holds the first protruding portion 151 or the second protruding portion 152 protruding from the support groove 154 of the support member 54, and restricts the position of the first protruding portion 151 or the second protruding portion 152 relative to the support groove 154. The position restricting portion 65 includes a pair of restricting members 651, 652 that hold the first protruding portion 151, and a pair of restricting members 653, 654 that hold the second protruding portion 152.

[0106] One restriction member 651 that holds the first protrusion 151 is fixed to the third housing portion 543 via a screw 97, and the other restriction member 652 is fixed to the fourth housing portion 544 via a screw 97. One restriction member 653 that holds the second protrusion 152 is fixed to the fifth housing portion 545 via a screw 97, and the other restriction member 654 is fixed to the sixth housing portion 546 via a screw 97.

[0107] The pair of regulating members 651, 652 can adjust their positions in the Z axis direction by an adjustment mechanism (not shown). Similarly, the pair of regulating members 653, 654 can adjust their positions in the Z axis direction by an adjustment mechanism (not shown).

[0108] In this way, the wavelength conversion member 50 of this embodiment is held within the support groove 154 with the movement in the Z-axis direction of the first protrusion 151 and the second protrusion 152 protruding outside the support groove 154 being restricted by the position restriction portion 65.

[0109] As described above, the light source device 100 of this embodiment comprises: a light source section 70 having a plurality of light-emitting elements 72 including a first light-emitting element 11 and a second light-emitting element 12 that emit excitation light E; a substrate 71 on which the plurality of light-emitting elements 72 are mounted and arranged along the X-axis; a first metal wire 74a that electrically connects the first light-emitting element 11 to a first wiring terminal 75a of the substrate 71; and a second metal wire 74b that electrically connects the second light-emitting element 12 to a second wiring terminal 75b of the substrate 71; a wavelength conversion member 50 that has a longitudinal shape along the X-axis and on which the excitation light E emitted from the first light-emitting element 11 and the second light-emitting element 12 is incident; and a support member 54 that has a support groove 154 that supports the wavelength conversion member 50. The wavelength conversion member 50 has a first surface 50a that emits the excitation light E, a second surface 50b that is located on the opposite side of the first surface 50a in the direction along the X-axis, a third surface 50c and a fourth surface 50d that intersect with the first surface 50a and the second surface 50b, respectively, and are located opposite each other, and a fifth surface 50e and a sixth surface 50f that intersect with the first surface 50a and the second surface 50b, respectively, and intersect with the third surface 50c and the fourth surface 50d, and are located opposite each other. The light source unit 70 is arranged so that the first light-emitting element 11 and the second light-emitting element 12 face the third surface 50c of the wavelength conversion member 50, and the support groove 154 of the support member 54 has a support surface 154s that faces the fourth surface 50d and supports the wavelength conversion member 50, and a first wall surface 154a that intersects the support surface 154s and is spaced apart from the fifth surface 50e of the wavelength conversion member 50. When the axis perpendicular to the X axis in the XZ plane parallel to the support surface 154s is defined as the Z axis, and the axis perpendicular to the X axis and the Z axis is defined as the Y axis, when viewed in a plane along the Y axis, the first light-emitting element 11 and the second light-emitting element 12 each have a rectangular outer shape, the outer peripheries 11L, 12L of the first light-emitting element 11 and the second light-emitting element 12 intersect with the X axis and the Z axis, the first wiring terminal 75a and the second wiring terminal 75b are located between the fifth surface 50e and the first wall surface 154a, and when viewed in a plane along the X axis, the first wall surface 154a extends further toward the light source unit 70 than the third surface 50c of the wavelength conversion member 50.

[0110] According to the light source device 100 of this embodiment, the metal wire 74 can be accommodated in the support groove 154 in the Z-axis direction, thereby reducing the gap S between the substrate 71 and the first side wall 141 and the second side wall 142 of the support member 54. This makes it possible to suppress leakage of the excitation light E emitted from each light-emitting element 72 of the light source unit 70 from the gap S between the substrate 71 and the support member 54. Therefore, the excitation light E can be efficiently incident on the wavelength conversion member 50, thereby improving the light utilization efficiency of the excitation light E emitted from the light source unit 70.

[0111] The projector 1 of this embodiment includes the light source device 100 that efficiently extracts bright fluorescent light Y from the wavelength conversion member 50, and therefore can provide a projector with excellent light utilization efficiency.

[0112] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0113] (First Modification) In the light source section 70 of the above embodiment, the metal wires 74 are drawn out from both sides of each light emitting element 72, but the configuration of the light source section in the present invention is not limited to this.

[0114] FIG. 9 is a cross-sectional view of a light source device 200 according to this modification. 9, the light source device 200 of this modification has a light source section 270. The light source section 270 has a substrate 71 and a plurality of light-emitting elements 272 mounted on the substrate 71. Each light-emitting element 272 has a light-emitting surface 72a, one anode electrode 72b, and one cathode electrode 72c. In this modification, each light-emitting element 272 has a configuration different from each light-emitting element 72 of the above embodiment in that it has one anode electrode 72b on one side of the light-emitting surface 72a.

[0115] The anode electrode 72b of each light-emitting element 227 of this modified example has a strip shape extending along one side of the rectangular light-emitting surface 72a. According to each light-emitting element 227 of this modified example, a plurality of metal wires 74 (three in FIG. 9 ) can be used to electrically connect the anode electrode 72b and the substrate 71. In this modified example, the metal wires 74 are drawn from the light-emitting element 272 to the first wall surface 154a side, but are not drawn to the second wall surface 154b side of the light-emitting element 272. For example, if any two of the plurality of light-emitting elements 272 are the first light-emitting element 111 and the second light-emitting element 112, the first metal wire 74a is drawn from the first light-emitting element 111 to the first wall surface 154a side, but not to the second wall surface 154b side. Also, the second metal wire 74b is drawn from the second light-emitting element 112 to the first wall surface 154a side, but not to the second wall surface 154b side.

[0116] According to the light source unit 270 of this modification, current can be supplied to the light-emitting surface 72a of each light-emitting element 272 via the three metal wires 74, so that the current density supplied to the light-emitting surface 72a is stable and excitation light E can be uniformly emitted from the light-emitting surface 72a. Therefore, each light-emitting element 272 can emit uniform and bright excitation light E from the light-emitting surface 72a.

[0117] In the light source device 200 of this modified example, the metal wire 74 is not provided on the second side wall 142 side, and therefore there is no contact between the metal wire 74 and the second side wall 142. Therefore, the distance between the sixth surface 50f of the wavelength conversion member 50 and the second wall surface 154b can be made smaller than the distance between the fifth surface 50e and the first wall surface 154a. In this modified example, the second wall surface 154b abuts against the sixth surface 50f of the wavelength conversion member 50. Therefore, by reducing the width of the support groove 154 in the Z-axis direction, the excitation light E emitted from each light-emitting element 72 can be made to enter the wavelength conversion member 50 efficiently.

[0118] Furthermore, since the wavelength conversion member 50 abuts on the sixth surface 50f in addition to the support surface 154s, it is possible to increase the contact area between the wavelength conversion member 50 and the support groove 154 compared to the configuration of the above embodiment. Therefore, by efficiently releasing heat from the wavelength conversion member 50 to the support member 54 side, it is possible to improve the cooling performance of the wavelength conversion member 50.

[0119] In this modified example, the second wall surface 154b abuts against the sixth surface 50f of the wavelength conversion member 50, but the second wall surface 154b and the sixth surface 50f may be arranged at a distance smaller than the distance between the fifth surface 50e and the first wall surface 154a.

[0120] (Second Modification) In the above embodiment, the light source section has only one light emitting element row in which multiple light emitting elements 72 are arranged, but the present invention is also applicable to a light source device having a light source section with two light emitting element rows.

[0121] FIG. 10 is a plan view of the light source device 300 of this modified example as viewed from the Y-axis direction. 10, the light source device 300 of this modification has a light source section 370. The light source section 370 has a substrate 71 and a first light-emitting element row R1 and a second light-emitting element row R2 mounted on the substrate 71. The first light-emitting element row R1 is composed of a plurality of light-emitting elements 272 including a first light-emitting element 111 and a second light-emitting element 112. The plurality of light-emitting elements 272 have the same configuration as the light source section 270 of the first modification.

[0122] The second light-emitting element row R2 is composed of a plurality of light-emitting elements 272 including the first light-emitting elements 111 and the second light-emitting elements 112, and is disposed adjacent to the first light-emitting element row R1 in the Z-axis direction. The first light-emitting element row R1 and the second light-emitting element row R2 are disposed in a line-symmetric relationship with each other with respect to an axis along the X-axis.

[0123] In the light source section 370 of this modified example, the first conductive section 75 connecting each light-emitting element 272 to the metal wire 74 is provided on the surface 71a side of the substrate 71 so as to be located on both sides of the first light-emitting element row R1 and the second light-emitting element row R2 in the Z-axis direction. Therefore, in the light source unit 370 of this modification, the direction in which the metal wires 74 are drawn out in the first light-emitting element row R1 and the direction in which the metal wires 74 are drawn out in the second light-emitting element row R2 are opposite to each other in the Z-axis direction. As shown in Fig. 10, the direction in which the metal wires 74 are drawn out from each light-emitting element 272 in the first light-emitting element row R1 is the +Z side, and the direction in which the metal wires 74 are drawn out from each light-emitting element 272 in the second light-emitting element row R2 is the -Z side.

[0124] In the light source device 300 of this modification, the metal wires 74 drawn out from the first light-emitting element row R1 and the second light-emitting element row R2 can be accommodated in the support groove 154 in the Z-axis direction. Therefore, even when a light source unit 370 including two light-emitting element rows is used, the excitation light E emitted from the light source unit 370 can be efficiently incident on the wavelength conversion member 50.

[0125] In the above embodiment, the light emitting elements 72 are arranged in the same direction and rotated at the same angle, but they may be arranged in different directions and rotated at different angles.

[0126] Furthermore, in the above embodiment, the substrate 71 of the light source section 70 and the support member 54 were arranged in a spaced-apart state, but the substrate 71 and the top surfaces 55a, 57a of the first side wall 141 and the second side wall 142 of the support member 54 may be in contact with each other.

[0127] Furthermore, in the above embodiment, a CPC is used as the angle conversion member, but instead of a CPC, a tapered rod in the shape of a truncated square pyramid, the area of ​​the exit end face of which is larger than the area of ​​the entrance end face, may be used.

[0128] In addition, in the above embodiment, an example was given in which the present invention was applied to a light source device equipped with a wavelength conversion member, but instead of this configuration, the present invention may be applied to a light source device that propagates incident light without wavelength conversion and then, for example, controls the angular distribution and emits the light. In this case, the wavelength conversion member in the above embodiment replaces the light guide member, and the light emitted from the light emitting element is emitted from the angle conversion member as light of the same wavelength band.

[0129] In addition, the specific descriptions of the shape, number, arrangement, materials, etc. of each component of the light source device and the projector are not limited to the above-described embodiments and can be modified as appropriate. Furthermore, in the above-described embodiments, an example was shown in which the light source device according to the present invention was mounted in a projector using a liquid crystal panel, but this is not limiting. The light source device according to the present invention may also be applied to a projector using a digital micromirror device as a light modulation device. Furthermore, the projector does not need to have multiple light modulation devices, and may have only one light modulation device.

[0130] In the above embodiment, the light source device of the present invention is applied to a projector, but the present invention is not limited to this. The light source device of the present invention can also be applied to lighting fixtures, automobile headlights, and the like.

[0131] Summary of this disclosure A summary of this disclosure is provided below.

[0132] (Appendix 1) a light source unit including a first light-emitting element and a second light-emitting element that emit light, a substrate on which the first light-emitting element and the second light-emitting element that are arranged along a first axis are mounted, a first metal wire that electrically connects the first light-emitting element and a first wiring terminal of the substrate, and a second metal wire that electrically connects the second light-emitting element and a second wiring terminal of the substrate; a light guiding member having a longitudinal shape along the first axis, into which the light emitted from the first light emitting element and the second light emitting element is incident; a support member having a support groove for supporting the light guide member, The light guide member is a first surface from which light is emitted, a second surface located on the opposite side to the first surface in a direction along the first axis, third and fourth surfaces that intersect with the first and second surfaces, respectively, and are located opposite each other, and fifth and sixth surfaces that intersect with the first and second surfaces, respectively, and also with the third and fourth surfaces, and are located opposite each other; the light source unit is provided so that the first light emitting element and the second light emitting element face the third surface of the light guiding member, The support groove of the support member is a support surface that faces the fourth surface and supports the light guide member; a first wall surface that intersects with the support surface and is spaced apart from the fifth surface of the light-guiding member; When an axis perpendicular to the first axis in a plane parallel to the support surface is defined as a second axis, and an axis perpendicular to the first axis and the second axis is defined as a third axis, When viewed in a plane in a direction along the third axis, the first light emitting element and the second light emitting element each have a rectangular outer shape, and the outer peripheries of the first light emitting element and the second light emitting element intersect with the first axis and the second axis, the first wiring terminal and the second wiring terminal are located between the fifth surface and the first wall surface, When viewed in a plane in a direction along the first axis, the first wall surface extends beyond the third surface of the light guide member to the light source unit side; Light source device.

[0133] In the light source device having this configuration, the metal wire fits into the gap between the first wall surface and the fifth surface of the light-guiding member in the second axial direction, allowing the substrate and the first side wall of the support member to be positioned close to each other. This reduces the gap between the substrate and the first side wall of the support member, thereby reducing leakage of light emitted from each light-emitting element of the light source unit through the gap between the substrate and the support member. This allows light to be efficiently incident on the light-guiding member, thereby improving the utilization efficiency of the light emitted from the light source unit.

[0134] (Appendix 2) When viewed in a plane in a direction along the third axis, At least a portion of a first electrode of the first light-emitting element to which the first metal wire is connected and at least a portion of a second electrode of the second light-emitting element to which the second metal wire is connected overlap with the light-guiding member. 10. The light source device of claim 1.

[0135] With this configuration, the first light-emitting element and the second light-emitting element are arranged in a sufficiently rotated state, which shortens the distance in the second axial direction between the first wiring terminal and the second wiring terminal electrically connected to each light-emitting element, thereby making it easier to realize a configuration in which the metal wire is accommodated in the gap between the first wall surface and the fifth surface in the second axial direction.

[0136] (Appendix 3) the support groove further includes a second wall surface that intersects with the support surface and is spaced apart from the sixth surface of the light guiding member, When viewed in a plane in a direction along the third axis, the first wiring terminal and the second wiring terminal are located between the sixth surface and the second wall surface, When viewed in a plane in a direction along the first axis, the second wall surface extends beyond the third surface of the light guide member to the light source unit side; 10. The light source device according to claim 1 or 2.

[0137] According to this configuration, the metal wire fits in the gap between the second wall surface and the sixth surface of the light guide member in the second axial direction, so the substrate and the second side wall of the support member can be disposed close to each other.

[0138] (Appendix 4) When viewed in a plane in a direction along the third axis, the first metal wire is drawn out in a direction in which a distance between an outer periphery of the first light emitting element and the first wall surface increases, and in a direction in which a distance between an outer periphery of the first light emitting element and the second wall surface increases, the second metal wire is drawn out in a direction in which the distance between the outer periphery of the second light emitting element and the first wall surface increases, and in a direction in which the distance between the outer periphery of the second light emitting element and the second wall surface increases, respectively. 4. The light source device according to claim 3.

[0139] This configuration makes it easier to ensure a space between the first and second metal wires and the first or second wall surface, thereby preventing contact between the metal wires and the first or second wall surface, and thus ensuring a sufficient length for each metal wire.

[0140] (Appendix 5) the support groove further has a second wall surface that intersects with the support surface and faces the sixth surface of the light guiding member, the first metal wire is drawn from the first light-emitting element to the first wall surface side, and is not drawn to the second wall surface side; the second metal wire is drawn from the second light-emitting element to the first wall surface side, and is not drawn to the second wall surface side; The distance between the sixth surface and the second wall surface is smaller than the distance between the fifth surface and the first wall surface. 5. A light source device according to any one of claims 1 to 4.

[0141] According to this configuration, since the metal wire is not provided on the second wall surface side, the metal wire does not come into contact with the second wall surface, and the distance between the sixth surface of the light-guiding member and the second wall surface can be reduced. Therefore, by reducing the width of the support groove in the second axis direction, light emitted from each light-emitting element can be efficiently incident on the light-guiding member.

[0142] (Appendix 6) the second wall surface abuts against the sixth surface of the light guiding member. 6. The light source device according to claim 5.

[0143] This configuration increases the contact area between the light guide member and the support groove, thereby efficiently dissipating heat from the light guide member to the support member, thereby improving the cooling performance of the light guide member.

[0144] (Appendix 7) the light source unit includes a first light-emitting element row including the first light-emitting element and the second light-emitting element, and a second light-emitting element row including the first light-emitting element and the second light-emitting element and arranged adjacent to the first light-emitting element row in a direction along the second axis; a direction in which metal wires in the first light-emitting element row are drawn out and a direction in which metal wires in the second light-emitting element row are drawn out are opposite to each other in a direction along the second axis; 7. A light source device according to any one of claims 1 to 6.

[0145] According to this configuration, the metal wires drawn out from the first light emitting element row and the second light emitting element row can be accommodated in the support groove in the second axial direction.

[0146] (Appendix 8) the first wall surface has a first portion located on the third surface side and a second portion located on the support surface side, the first portion extending in a direction perpendicular to the support surface, and the second portion inclining so as to approach the fifth surface from the first portion side toward the support surface side; 8. A light source device according to any one of claims 1 to 7.

[0147] According to this configuration, a portion of the light emitted from the light-emitting element travels through the gap between the third surface and the first portion of the light-guiding member, and then enters the second portion inclined with respect to the support surface. At this time, the light is reflected by the second portion and enters the third surface of the light-guiding member. In this way, light passing through the gap between the third surface of the light-guiding member and the first wall surface is more likely to enter the third surface, thereby reducing the amount of light reflected by the support surface and returning to the light-emitting element. In addition, a portion of the light is reflected by the first portion extending perpendicular to the support surface and enters the third surface of the light-guiding member. Therefore, a light source device can be realized that has high light utilization efficiency and makes it easy to obtain light with a desired intensity.

[0148] (Appendix 9) When viewed in a plane in a direction along the third axis, the first light-emitting element and the second light-emitting element have the same outer shape and are arranged in a state rotated in the same direction and by the same angle around a central axis along the third axis; 9. A light source device according to any one of claims 1 to 8.

[0149] This configuration allows the space required for arranging the light emitting elements on the substrate to be reduced.

[0150] (Appendix 10) When viewed in a plane in a direction along the first axis, At least a portion of the first metal wire and the second metal wire is located closer to the light guide member than an opening surface of the support groove in the support member. 10. A light source device according to any one of claims 1 to 9.

[0151] According to this configuration, the light source unit and the support member can be disposed close to each other, which reduces the gap between the substrate and the support member, thereby reducing light leakage from the gap.

[0152] (Appendix 11) the first light-emitting element and the second light-emitting element emit first light having a first wavelength band; the light guide member is a wavelength conversion member that includes a phosphor, converts the first light emitted from the first light emitting element and the second light emitting element into second light having a second wavelength band different from the first wavelength band, and emits the second light. 11. A light source device according to any one of claims 1 to 10.

[0153] According to this configuration, it is possible to realize a light source device capable of emitting second light obtained by wavelength conversion of first light.

[0154] (Appendix 12) a light source device according to any one of Supplementary Note 1 to Supplementary Note 11; a light modulation device that modulates the light emitted from the light source device in accordance with image information; a projection optical device that projects the light modulated by the light modulation device, projector.

[0155] A projector with this configuration can provide a projector that can project images with excellent display quality. [Explanation of symbols]

[0156] 1...Projector, 4B, 4G, 4R...Light modulation device, 6...Projection optical device, 11, 111...First light-emitting element, 11L...Outer periphery (of first light-emitting element), 11b...Anode electrode (first electrode), 12, 112...Second light-emitting element, 12L...Outer periphery (of second light-emitting element), 12b...Anode electrode (second electrode), 50...Wavelength conversion member (light-guiding member), 50a...First surface, 50b...Second surface, 50c...Third surface, 50d...Fourth surface, 50e...Fifth surface, 50f...Sixth surface, 51, 70, 270, 370...Light source unit, 54 ...Support member, 71...substrate, 72,227,272...light-emitting element, 74...metal wire, 74a...first metal wire, 74b...second metal wire, 75a...first wiring terminal, 75b...second wiring terminal, 100,200,300,1000...light source device, 154...support groove, 154a...first wall surface, 154b...second wall surface, 154s...support surface, 154K...opening surface, 54a1...first portion, 54a2...second portion, C...central axis, R1...first light-emitting element row, R2...second light-emitting element row, E...excitation light (first light), Y...fluorescence (second light).

Claims

1. a light source unit including a first light-emitting element and a second light-emitting element that emit light, a substrate on which the first light-emitting element and the second light-emitting element that are arranged along a first axis are mounted, a first metal wire that electrically connects the first light-emitting element and a first wiring terminal of the substrate, and a second metal wire that electrically connects the second light-emitting element and a second wiring terminal of the substrate; a light guiding member having a longitudinal shape along the first axis, into which the light emitted from the first light emitting element and the second light emitting element is incident; a support member having a support groove for supporting the light guide member, The light guide member is a first surface from which light is emitted, a second surface located on the opposite side to the first surface in a direction along the first axis, third and fourth surfaces that intersect with the first and second surfaces, respectively, and are located opposite to each other, and fifth and sixth surfaces that intersect with the first and second surfaces, respectively, and also with the third and fourth surfaces, and are located opposite to each other; the light source unit is provided such that the first light-emitting element and the second light-emitting element face the third surface of the light-guiding member, The support groove of the support member is a support surface that faces the fourth surface and supports the light guide member; a first wall surface that intersects with the support surface and is spaced apart from the fifth surface of the light guide member; When an axis perpendicular to the first axis in a plane parallel to the support surface is defined as a second axis, and an axis perpendicular to the first axis and the second axis is defined as a third axis, When viewed in a plane in a direction along the third axis, the first light-emitting element and the second light-emitting element each have a rectangular outer shape, and outer peripheries of the first light-emitting element and the second light-emitting element intersect with the first axis and the second axis, the first wiring terminal and the second wiring terminal are located between the fifth surface and the first wall surface, When viewed in a plane in a direction along the first axis, the first wall surface extends beyond the third surface of the light guide member to a side of the light source unit; Light source device.

2. When viewed in a plane in a direction along the third axis, At least a portion of a first electrode of the first light-emitting element to which the first metal wire is connected and at least a portion of a second electrode of the second light-emitting element to which the second metal wire is connected overlap with the light-guiding member. The light source device according to claim 1 .

3. the support groove further includes a second wall surface that intersects with the support surface and is spaced apart from the sixth surface of the light guide member, When viewed in a plane in a direction along the third axis, the first wiring terminal and the second wiring terminal are located between the sixth surface and the second wall surface, When viewed in a plane in a direction along the first axis, the second wall surface extends beyond the third surface of the light guide member to a side of the light source unit; The light source device according to claim 1 .

4. When viewed in a plane in a direction along the third axis, the first metal wire is drawn out in a direction in which a distance between an outer periphery of the first light emitting element and the first wall surface increases, and in a direction in which a distance between the outer periphery of the first light emitting element and the second wall surface increases, the second metal wire is drawn out in a direction in which a distance between an outer periphery of the second light emitting element and the first wall surface increases, and in a direction in which a distance between an outer periphery of the second light emitting element and the second wall surface increases, The light source device according to claim 3 .

5. the support groove further includes a second wall surface that intersects with the support surface and faces the sixth surface of the light guide member, the first metal wire is drawn from the first light-emitting element to the first wall surface side, and is not drawn to the second wall surface side; the second metal wire is drawn from the second light-emitting element to the first wall surface side, and is not drawn to the second wall surface side; a distance between the sixth surface and the second wall surface is smaller than a distance between the fifth surface and the first wall surface; 3. The light source device according to claim 1.

6. the second wall surface abuts against the sixth surface of the light guiding member; The light source device according to claim 5 .

7. the light source unit includes a first light-emitting element row including the first light-emitting element and the second light-emitting element, and a second light-emitting element row including the first light-emitting element and the second light-emitting element and arranged adjacent to the first light-emitting element row in a direction along the second axis, a direction in which metal wires in the first light-emitting element row are drawn out and a direction in which metal wires in the second light-emitting element row are drawn out are opposite to each other in a direction along the second axis; The light source device according to claim 1 .

8. the first wall surface has a first portion located on the third surface side and a second portion located on the support surface side, the first portion extending in a direction perpendicular to the support surface, and the second portion inclining so as to approach the fifth surface from the first portion side toward the support surface side; The light source device according to claim 1 .

9. When viewed in a plane in a direction along the third axis, the first light-emitting element and the second light-emitting element have the same outer shape and are arranged in a state rotated in the same direction and by the same angle around a central axis along the third axis; The light source device according to claim 1 .

10. When viewed in a plane in a direction along the first axis, At least a portion of the first metal wire and the second metal wire is located closer to the light guide member than an opening surface of the support groove in the support member. The light source device according to claim 1 .

11. the first light-emitting element and the second light-emitting element emit first light having a first wavelength band; the light guide member is a wavelength conversion member that includes a phosphor and converts the first light emitted from the first light emitting element and the second light emitting element into second light having a second wavelength band different from the first wavelength band, and emits the second light.

3. The light source device according to claim 1.

12. The light source device according to claim 1 or 2; a light modulation device that modulates the light emitted from the light source device in accordance with image information; a projection optical device that projects the light modulated by the light modulation device, projector.

Images