Light source device and projector

Abstract

A light source device and a projector can obtain desired optical characteristics. The light source device includes: a light source unit including a light source substrate including a first surface and a second surface opposite to the first surface, and a light emitting element provided on the first surface of the light source substrate; a light guide member that guides light emitted from the light-emitting element of the light source unit; a support member that supports the light guide member; a fixing part which is provided on the outer peripheral edge of the light source substrate and fixes the light source part and the support member such that the light-emitting element provided on the first surface of the light source substrate faces the light guide member; the support member has a groove portion, the light guide member is disposed in the groove portion, the light source substrate and the support member are in contact with each other by means of the protrusion portion, and the protrusion portion is provided on at least one of a surface of the support member facing the first surface of the light source substrate and the first surface of the light source substrate. The light-emitting element is separated from the support member and the light guide member.

Description

Technical Field

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

[0002] As a light source device for a projector, a light source device utilizing fluorescence emitted from a phosphor when the phosphor is irradiated with excitation light emitted from a light emitting element has been proposed.

[0003] Patent Document 1 below discloses a light source device including: an excitation light source including a light emitting element and a support substrate; a fluorescent rod that converts the excitation light emitted from the light emitting element into fluorescent light; and a support that releases heat generated by the fluorescent rod. In this light source device, the fluorescent rod is held in the groove of the support by pressing the fluorescent rod with a contact member provided on the support substrate of the excitation light source.

[0004] Patent Document 1: International Publication No. 2020 / 254455

[0005] However, in the light source device of Patent Document 1, the support substrate may be warped due to heat from the light emitting element in the excitation light source. For example, if the support substrate is warped toward the phosphor rod, the contact member may press the phosphor rod too hard, causing it to break or failing to obtain the desired optical characteristics.

[0006] Furthermore, in the absence of an abutment component, the distance between the phosphor rod and the light emitting element changes due to warping of the supporting substrate, and the desired optical characteristics cannot be obtained. Alternatively, if the distance between the phosphor rod and the light emitting element is too close, the phosphor rod and the light emitting element come into contact and may be damaged or the desired optical characteristics cannot be obtained.

[0007] In the above, a light source device with wavelength conversion is described as an example. However, it is desirable to provide a light source device with excellent reliability that can obtain desired optical characteristics even in a light source device without wavelength conversion. Summary of the invention

[0008] In order to solve the above-mentioned problems, a light source device of one embodiment of the present invention comprises: a light source portion, which has a light source substrate and a light-emitting element, the light source substrate includes a first surface and a second surface on the side opposite to the first surface, and the light-emitting element is arranged on the first surface of the light source substrate; a light-guiding component, which guides light emitted from the light-emitting element of the light source portion; a supporting component, which supports the light-guiding component on the groove portion; a fixing portion, which is arranged on the outer peripheral edge portion of the light source substrate, so as to fix the light source portion and the supporting component in a manner that the light-emitting element arranged on the first surface of the light source substrate and the light-guiding component are opposed to each other; and a convex portion, which is closer to the inner peripheral side of the light source substrate than the fixing portion, the supporting component has a groove portion, the light-guiding component is arranged in the groove portion, the light source substrate and the supporting component are in contact with each other by means of the convex portion, and the convex portion is arranged on at least one of the opposing surface of the supporting component opposite to the first surface of the light source substrate and the first surface of the light source substrate, so that the light-emitting element is separated from the supporting component and the light-guiding component.

[0009] A projector according to one embodiment of the present invention comprises: a light source device according to one embodiment of the present invention; a light modulator that modulates light emitted from the light source device according to image information; and a projection optical device that projects the light modulated by the light modulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a diagram showing a schematic structure of a projector according to one embodiment.

[0011] Figure 2 It is a schematic structural diagram of the first lighting device.

[0012] Figure 3 It is a plan view showing the main structure of the light source unit.

[0013] Figure 4 It is along Figure 3 Cross-sectional view taken along line IV-IV.

[0014] Figure 5 This is a top view of the light source device viewed from the Y-axis direction.

[0015] Figure 6 It is along Figure 5 A cross-sectional view of the light source device taken along line VI-VI.

[0016] Figure 7 It is a plan view showing the main structure of the light source device according to the first modification.

[0017] Figure 8 It is a plan view showing the main structure of the light source device according to the second modification.

[0018] Fig. 9 It is a plan view showing the main structure of the light source device according to the third modified example.

[0019] 1: projector; 4B, 4G, 4R: light modulator; 6: projection optical device; 30, 130: convex portion; 31: opposing surface; 50: wavelength conversion component; 50a, 55a: first surface; 50b, 55b: second surface; 51, 81: light source portion; 54: supporting portion; 55: light source substrate; 56: light emitting element; 57: wiring; 59, 159, 540: fixing portion; 90: pressing portion; 100, 200, 300, 400: light source device; 154: groove portion; 550: substrate; 551: first insulating layer; 552: wiring layer; 553: second insulating layer; Y: fluorescent light. DETAILED DESCRIPTION

[0020] Hereinafter, one embodiment of the present invention will be described.

[0021] The projector of this embodiment is an example of a projector using a liquid crystal panel as a light modulation device.

[0022] In the following drawings, in order to make each component easier to see, the scale of the dimensions may be different depending on the component.

[0023] Figure 1 1 is a diagram showing a schematic configuration of a projector 1 according to the present embodiment.

[0024] like Figure 1 As shown, the projector 1 of this embodiment is a projection type image display device that displays a color image on a screen SCR as a projection surface. The projector 1 has three light modulators corresponding to the respective color lights of red light LR, green light LG, and blue light LB.

[0025] 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 synthesis element 5 , and a projection optical device 6 .

[0026] 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 modulator 4B. The detailed structures of the first illumination device 20 and the second illumination device 21 will be described later.

[0027] In the following drawings, the XYZ vertical coordinate system is used for explanation as needed. The Z axis is an axis along the up-down direction of the projector 1. The X axis is an axis parallel to the optical axis AX1 of the first lighting device 20 and the optical axis AX2 of the second lighting device 21. The Y axis is an axis perpendicular to the X axis and the Z axis. The optical axis AX1 of the first lighting device 20 is the center axis of the fluorescent light Y emitted from the first lighting device 20. The optical axis AX2 of the second lighting device 21 is the center axis of the blue light LB emitted from the second lighting device 21. One of the two directions along the X axis is called the +X direction, and the opposite direction thereof is called the -X direction, one of the two directions along the Y axis is called the +Y direction, and the opposite direction thereof is called the -Y direction, one of the two directions along the Z axis is called the +Z direction, and the opposite direction thereof is called the -Z direction. In addition, when the two directions along the X axis are not distinguished, it is called the X axis direction, when the two directions along the Y axis are not distinguished, it is called the Y axis direction, and when the two directions along the Z axis are not distinguished, it is called the Z axis direction.

[0028] 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 reflection mirror 8a, and a second reflection mirror 8b.

[0029] 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 reflector 8b is arranged in the optical path of the green light LG. The second reflector 8b reflects the green light LG reflected by the dichroic mirror 7 toward the light modulator 4G. The first reflector 8a is arranged in the optical path of the red light LR. The first reflector 8a reflects the red light LR transmitted by the dichroic mirror 7 toward the light modulator 4R.

[0030] On the other hand, the blue light LB emitted from the second illumination device 21 is reflected by the reflection mirror 9 toward the light modulation device 4B.

[0031] Next, the structure of the second lighting device 21 will be described.

[0032] The second lighting device 21 includes a light source unit 81, a condenser lens 82, a diffusion plate 83, a rod lens 84, and a relay lens 85. The light source unit 81 is composed of at least one semiconductor laser. The light source unit 81 emits blue light LB composed of laser light. In addition, the light source unit 81 is not limited to a semiconductor laser, and can also be composed of an LED that emits blue light.

[0033] The condenser lens 82 is composed of a convex lens. The condenser lens 82 allows the blue light LB emitted from the light source unit 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 at a predetermined diffusion degree, and generates the blue light LB having a substantially uniform light distribution similar to the fluorescent light Y emitted from the first lighting device 20. As the diffuser plate 83, for example, frosted glass composed of optical glass is used.

[0034] The blue light LB diffused by the diffuser 83 is incident on the rod lens 84. The rod lens 84 has a prism shape extending along the optical axis AX2 direction of the second lighting device 21. The rod lens 84 has a light incident end face 84a provided at one end and a light emitting end face 84b provided at the other end. The diffuser 83 is fixed to the light incident end face 84a of the rod lens 84 via an optical adhesive (not shown). It is preferred that the refractive index of the diffuser 83 and the refractive index of the rod lens 84 are as consistent as possible.

[0035] The blue light LB is totally reflected and propagated inside the rod lens 84, and is emitted from the light emission end face 84b in a state where the uniformity of the illumination distribution is improved. The blue light LB emitted from the rod lens 84 is incident on the relay lens 85. The relay lens 85 allows the blue light LB, whose uniformity of illumination distribution is improved by the rod lens 84, to be incident on the reflector 9.

[0036] The shape of the light emitting end surface 84b of the rod lens 84 is a rectangle substantially similar to the shape of the image forming region of the light modulator 4B. Thus, the blue light LB emitted from the rod lens 84 is efficiently incident on the image forming region of the light modulator 4B.

[0037] The light modulator 4R modulates the red light LR according to the image information to form image light corresponding to the red light LR. The light modulator 4G modulates the green light LG according to the image information to form image light corresponding to the green light LG. The light modulator 4B modulates the blue light LB according to the image information to form image light corresponding to the blue light LB.

[0038] The light modulators 4R, 4G, and 4B each use a transmissive liquid crystal panel, for example. Polarizers (not shown) are disposed on the incident and exiting sides of the liquid crystal panel, respectively. The polarizer allows only linearly polarized light in a specific direction to pass through.

[0039] A field lens 10R is arranged on the incident side of the light modulator 4R. A field lens 10G is arranged on the incident side of the light modulator 4G. A field lens 10B is arranged on the incident side of the light modulator 4B. The field lens 10R collimates the principal ray of the red light LR incident on the light modulator 4R. The field lens 10G collimates the principal ray of the green light LG incident on the light modulator 4G. The field lens 10B collimates the principal ray of the blue light LB incident on the light modulator 4B.

[0040] The light synthesizing element 5 synthesizes the image lights corresponding to the red light LR, the green light LG, and the blue light LB by receiving the image lights emitted from the light modulators 4R, 4G, and 4B, and emits the synthesized image lights toward the projection optical device 6. The light synthesizing element 5 uses, for example, a cross dichroic prism.

[0041] The projection optical device 6 is composed of a plurality of projection lenses. The projection optical device 6 enlarges and projects the image light synthesized by the light synthesizing element 5 toward the screen SCR. Thus, a color image is displayed on the screen SCR.

[0042] Next, the structure of the first lighting device 20 will be described.

[0043] Figure 2 It is a schematic structural diagram of the first lighting device 20.

[0044] like Figure 2 As shown, the first illumination device 20 includes a light source device 100 , a parallelization optical system 63 , an integrator optical system 70 , a polarization conversion element 102 , and a superposition optical system 103 .

[0045] The light source device 100 includes a wavelength conversion member 50, a light source unit 51, an angle conversion member 52, a reflector 53, a support member 54, a first heat dissipation member 71, a second heat dissipation member 72, a holding member 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.

[0046] The wavelength conversion component 50 has a quadrangular prism shape extending along the X-axis and has 6 faces. The side of the wavelength conversion component 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 long side of the wavelength conversion component 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 component 50 cut along the YZ plane perpendicular to the X-axis is a square. In addition, the cross-sectional shape of the wavelength conversion component 50 cut along the YZ plane may also be a rectangle.

[0047] The wavelength conversion component 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 the X-axis along the long side of the wavelength conversion component 50 and are located on opposite sides of each other on the X-axis. In the present embodiment, the first surface 50a is located on one side of the X-axis direction along the X-axis, that is, the +X side, and the second surface 50b is located on the opposite direction of the X-axis direction, that is, the -X side.

[0048] The third surface 50c and the fourth surface 50d intersect the first surface 50a and the second surface 50b, and are located on opposite sides of each other on the Y axis which intersects the X axis along the long side of the wavelength conversion member 50 and is perpendicular to the X axis in the present embodiment. In the present 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.

[0049] The fifth surface 50e and the sixth surface 50f intersect the third surface 50c and the fourth surface 50d, and are located on opposite sides of each other on the Z axis which intersects the X axis and the Y axis and is perpendicular to the X axis and the Y axis in the present embodiment. In the present 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.

[0050] In the following description, when the third surface 50c, the fourth surface 50d, the fifth surface 50e, and the sixth surface 50f are not distinguished, they may be simply referred to as side surfaces 50c, 50d, 50e, and 50f.

[0051] The wavelength conversion component 50 contains at least a phosphor, and converts the excitation light E having a first wavelength band emitted from the light emitting element 56 of the light source unit 51 into the fluorescence Y having a second wavelength band different from the first wavelength band. The excitation light E enters the wavelength conversion component 50 from the third surface 50c. The fluorescence Y is guided inside the wavelength conversion component 50 and then emitted from the first surface 50a. The excitation light E of this embodiment corresponds to the "first light" in the claims. The fluorescence Y of this embodiment corresponds to the "second light" in the claims.

[0052] The wavelength conversion member 50 includes a ceramic phosphor composed of a polycrystalline phosphor that converts the wavelength of the excitation light E into fluorescence Y. The second wavelength band of the fluorescence Y is, for example, a yellow wavelength band of 490 nm to 750 nm. That is, the fluorescence Y is yellow fluorescence containing red light components and green light components.

[0053] The wavelength conversion component 50 may also contain a single crystal phosphor instead of a polycrystalline phosphor. Alternatively, the wavelength conversion component 50 may also be made of fluorescent glass. Alternatively, the wavelength conversion component 50 may also be made of a material in which a plurality of fluorescent particles are dispersed in a binder made of glass or resin. The wavelength conversion component 50 made of such a material converts the excitation light E into fluorescent light Y.

[0054] Specifically, the material of the wavelength conversion component 50 contains, for example, yttrium aluminum garnet (YAG)-based phosphors. Taking YAG:Ce containing cerium (Ce) as an activator as an example, as the material of the wavelength conversion component 50, a material obtained by mixing raw material powders containing constituent elements such as Y2O3, Al2O3, and CeO3 and subjecting them to a solid phase reaction, Y-Al-O amorphous particles obtained by a wet method such as a coprecipitation method and a sol-gel method, YAG particles obtained by a gas phase method such as a spray drying method, a flame pyrolysis method, and a thermal plasma method, etc. can be used.

[0055] The light source unit 51 includes a light source substrate 55 and a plurality of light emitting elements 56. The light source substrate 55 includes a first surface 55a and a second surface 55b opposite to the first surface 55a. The light source substrate 55 has a structure in which a plurality of layers are stacked as described below.

[0056] The plurality of light emitting elements 56 are provided on the first surface 55a of the light source substrate 55. The light source unit 51 of the present embodiment includes the plurality of light emitting elements 56, but the number of the light emitting elements 56 is not particularly limited.

[0057] The light emitting element 56 has a light emitting surface 56a that emits excitation light E of a first wavelength band. The light emitting element 56 is composed of, for example, a light emitting diode (LED). The light emitting surface 56a of the light emitting element 56 is opposite to the third surface 50c of the wavelength conversion component 50, and emits the excitation light E toward the third surface 50c. The first wavelength band is, for example, a wavelength band from blue to violet of 400nm to 480nm, and the peak wavelength is, for example, 445nm. In this way, the light source unit 51 is arranged opposite to the third surface 50c, which is one of the four side surfaces 50c, 50d, 50e, and 50f along the long side direction of the wavelength conversion component 50.

[0058] Figure 3 1 is a plan view showing the main structure of the light source unit 51 . Figure 3 It is a plan view of the first surface 55 a of the light source substrate 55 of the light source unit 51 .

[0059] like Figure 3 As shown, the light source substrate 55 has a substantially rectangular shape. A plurality of light emitting elements 56 are arranged in a straight line on the first surface 55a of the light source substrate 55. The light source substrate 55 also has wiring 57 electrically connected to the plurality of light emitting elements 56, a connector portion 58 electrically connected to the wiring 57, a fixing portion 59, and a recess 60.

[0060] The connector portion 58 electrically connects the external device to the light source portion 51. The connector portion 58 supplies the power supplied from the external device to the light emitting element 56 via the wiring 57. The fixing portion 59 is a portion for fixing the light source portion 51 to the supporting member 54 described later. The fixing portion 59 of the light source substrate 55 is fixed to the supporting member 54 via a screw member. The fixing portion 59 is composed of a plurality of through holes for inserting screws, and in the case of this embodiment, four through holes 59a.

[0061] When the light source substrate 55 is fixed to the supporting member 54 , the convex portion provided on the supporting member 54 is inserted into the concave portion 60 .

[0062] The fixing portion 59 is provided at the outer peripheral edge of the light source substrate 55. Specifically, four through holes 59a are respectively arranged at the corners of the rectangular light source substrate 55. The fixing portion 59 fixes the light source unit 51 and the supporting member 54 so that the light emitting element 56 provided on the first surface 55a of the light source substrate 55 and the wavelength conversion member 50 face each other.

[0063] In the case of this embodiment, the fixing portion 59 is also used to fix the first heat dissipation component 71 to the second surface 55b of the light source substrate 55. That is, the first heat dissipation component 71 is fixed to the support component 54 together with the light source substrate 55 via the same screw member. According to this structure, the fixing portion 59 that fixes the light source substrate 55 to the support component 54 also serves as a screw hole for fixing the first heat dissipation component 71, thereby reducing the number of holes provided in the light source substrate 55. As a result, the rigidity of the light source substrate 55 can be improved.

[0064] Figure 4 It is along Figure 3 Cross-sectional view taken along line IV-IV.

[0065] like Figure 4 As shown, the light source substrate 55 of the light source unit 51 includes: a substrate 550 having a surface 550a and a back surface 550b; a first insulating layer 551, which is arranged on the surface 550a which is one side of the substrate 550; a wiring layer 552, which is stacked on the side of the first insulating layer 551 opposite to the substrate 550, constituting the above-mentioned wiring 57; a second insulating layer 553, which is stacked on the side of the first insulating layer 551 opposite to the substrate 550 in a manner covering the wiring layer 552; and a recess 554, which is arranged in the second insulating layer 553.

[0066] As a material of the substrate 550, aluminum having excellent heat dissipation properties is used, for example. The first insulating layer 551 and the second insulating layer 553 are formed of a resist film. The wiring layer 552 is formed of a wiring pattern formed of copper foil. The recess 554 is an opening that exposes a part of the first insulating layer 551, and forms the recess 60.

[0067] In the present embodiment, the second surface 55b of the light source substrate 55 refers to the back surface 550b of the base material 550, and the first surface 55a of the light source substrate 55 refers to the surface of the layer closest to the surface among the insulating layer and the wiring layer stacked on the surface 550a side of the base material 550. Therefore, the first surface 55a of the light source substrate 55 is not a flat surface, but refers to a surface including projections and depressions corresponding to the stacked structure of the insulating layer and the wiring layer.

[0068] The light emitting element 56 is provided on the second insulating layer 553 in a region not shown and is electrically connected to the wiring layer 552 by wire bonding, etc. That is, the light emitting element 56 is provided on the surface of the second insulating layer 553 constituting the first surface 55a of the light source substrate 55.

[0069] return Figure 2 The support member 54 has a groove 154 extending in the X-axis direction along the long side of the wavelength conversion member 50 and accommodating a part of the wavelength conversion member 50. The wavelength conversion member 50 is arranged inside the groove 154, and the heat generated by the wavelength conversion member 50 is diffused and released to the outside. Therefore, the support member 54 is preferably made of a material having a predetermined strength and high thermal conductivity. As the material of the support member 54, for example, a metal such as aluminum and stainless steel is used, and an aluminum alloy such as 6061 series is particularly preferably used. The specific structure of the support member 54 will be described later.

[0070] The first heat dissipation component 71 is fixed to the second surface 55b of the light source substrate 55, and dissipates the heat of the light source substrate 55. The first heat dissipation component 71 of the present embodiment corresponds to the "heat dissipation component" of the claims. The first heat dissipation component 71 has a flat plate portion 71a and a plurality of fins 71b. The flat plate portion 71a is in contact with the second surface 55b of the light source substrate 55 over substantially the entire surface. The plurality of fins 71b are arranged on the flat plate portion 71a at intervals from each other in the long axis direction (X-axis direction) of the wavelength conversion component 50. The number of fins 71b is not particularly limited. The first heat dissipation component 71 is made of metal such as stainless steel, aluminum, etc., which has excellent heat dissipation properties.

[0071] The second heat dissipation component 72 is fixed to the back side 32 of the support component 54 to dissipate the heat of the support component 54. The second heat dissipation component 72 has a flat plate portion 72a and a plurality of fins 72b. The flat plate portion 72a is in contact with the back side 32 of the support component 54 over substantially the entire surface. The plurality of fins 72b are arranged on the flat plate portion 72a at intervals from each other in the long axis direction (X-axis direction) of the wavelength conversion component 50. The number of fins 72b is not particularly limited. The second heat dissipation component 72 is made of a metal such as stainless steel, aluminum, etc., which has excellent heat dissipation properties.

[0072] The wavelength conversion member 50 of the present embodiment includes a first protrusion 151 protruding from the groove 154 in the +X direction and a second protrusion 152 protruding from the groove 154 in the −X direction.

[0073] The holding member 65 holds the first protrusion 151 or the second protrusion 152 protruding from the groove 154 of the support member 54. Therefore, the wavelength conversion member 50 is in a state where a part thereof does not contact the wall surface of the groove 154 and protrudes to the outside of the groove 154 of the support member 54. The holding member 65 holds the portion of the wavelength conversion member 50 protruding to the outside of the groove 154. The holding member 65, together with the pair of pressing members 90, restricts the position of the wavelength conversion member 50 relative to the support member 54.

[0074] A pair of pressing members 90 limits the position of the wavelength conversion member 50 relative to the supporting member 54 in the Y-axis direction inside the groove 154. The pair of pressing members 90 is arranged opposite to the supporting surface 54s of the groove 154. Thus, the pressing member 90 limits the movement of the wavelength conversion member 50 in the groove 154 along the Y-axis direction. The pressing member 90 is made of a material that can be elastically deformed. As an example, the pressing member 90 is made of a leaf spring made of a metal material, for example, a stainless steel material such as SUS304.

[0075] The pair of pressing members 90 are disposed at positions not overlapping the light emitting elements 56 of the light source unit 51, and press the wavelength conversion member 50 against the support surface 54s of the groove 154 of the support member 54. The pair of pressing members 90 are fixed to the support member 54.

[0076] The reflector 53 is provided on the second surface 50b of the wavelength conversion member 50. The reflector 53 guides light into the wavelength conversion member 50 and reflects the fluorescence Y reaching the second surface 50b. The reflector 53 is composed of a metal film or a dielectric multilayer film formed on the second surface 50b of the wavelength conversion member 50.

[0077] In the first lighting device 20, when the excitation light E emitted from the light source unit 51 is incident on the wavelength conversion member 50, the fluorescent body contained in the wavelength conversion member 50 is excited, and the fluorescent light Y is emitted from any light-emitting point. The fluorescent light Y travels in all directions from any light-emitting point, and the fluorescent light Y traveling toward the four side surfaces 50c, 50d, 50e, and 50f is repeatedly totally reflected at a plurality of locations of the side surfaces 50c, 50d, 50e, and 50f, and travels toward the first surface 50a or the second surface 50b. The first surface 50a emits the fluorescent light Y that is propagated by total reflection and guided inside the wavelength conversion member 50. In the case of the present embodiment, the fluorescent light Y traveling toward the first surface 50a is incident on the angle conversion member 52 provided on the first surface 50a. The fluorescent light Y traveling toward the second surface 50b is reflected by the reflector 53 and travels toward the first surface 50a.

[0078] A portion of the excitation light E that is not used for exciting the fluorescent body among the excitation light E incident on the wavelength conversion member 50 is reflected by the components including the light emitting element 56 of the light source unit 51 around the wavelength conversion member 50 or the reflector 53 provided on the second surface 50b. Therefore, a portion of the excitation light E is confined inside the wavelength conversion member 50 and reused.

[0079] The angle conversion member 52 is provided on the first surface 50a of the wavelength conversion member 50. The angle conversion member 52 is constituted by, for example, a tapered rod. The angle conversion member 52 has a light incident surface 52a for incident fluorescent light Y emitted from the wavelength conversion member 50, a light exit surface 52b for emitting the fluorescent light Y, and a side surface 52c for reflecting the incident fluorescent light Y toward the light exit surface 52b.

[0080] The angle conversion member 52 has a quadrangular pyramid shape, and the cross-sectional area perpendicular to the optical axis J expands along the traveling direction of the light. Therefore, the area of ​​the light exit surface 52b is larger than the area of ​​the light incident surface 52a. An axis passing through the center of the light exit surface 52b and the light incident surface 52a and parallel to the X-axis is set as the optical axis J of the angle conversion member 52. In addition, the optical axis J of the angle conversion member 52 is consistent with the optical axis AX1 of the first lighting device 20.

[0081] The fluorescence Y incident on the angle conversion member 52 changes its direction so as to approach a direction parallel to the optical axis J whenever it is totally reflected at the side surface 52c while traveling inside the angle conversion member 52. In this way, the angle conversion member 52 converts the emission angle distribution of the fluorescence Y 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 incident angle of the fluorescence Y on the light incident surface 52a.

[0082] Generally, the etendue of light, which is defined by the product of the area of ​​the light emission region and the maximum emission angle, which is the solid angle of the light, is preserved, and therefore the etendue of the fluorescence Y is also preserved before and after passing through the angle conversion member 52. As described above, the angle conversion member 52 has a structure in which the area of ​​the light emission surface 52b is larger than the area of ​​the light incident surface 52a. Therefore, from the viewpoint of preserving the etendue, the angle conversion member 52 can make the maximum emission angle of the fluorescence Y on the light emission surface 52b smaller than the maximum incident angle of the fluorescence Y on the light incident surface 52a.

[0083] The angle conversion member 52 is fixed to the wavelength conversion member 50 via an optical adhesive (not shown) in such a manner that the light incident surface 52a faces the first surface 50a of the wavelength conversion member 50. That is, the angle conversion member 52 is in contact with the wavelength conversion member 50 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 is provided between the angle conversion member 52 and the wavelength conversion member 50, the fluorescence Y that enters the light incident surface 52a at an angle greater than the critical angle among the fluorescence Y that reaches the light incident surface 52a of the angle conversion member 52 is totally reflected by the light incident surface 52a and cannot enter the angle conversion member 52. In contrast, as in the present embodiment, when no gap is provided between the angle conversion member 52 and the wavelength conversion member 50, the loss component of the fluorescence Y that cannot enter the angle conversion member 52 due to total reflection can be reduced. From this point of view, it is preferable that the refractive index of the angle conversion member 52 and the refractive index of the wavelength conversion member 50 are as consistent as possible.

[0084] As the angle conversion member 52, a compound parabolic concentrator (CPC) may be used instead of the tapered rod. Even when the CPC is used as the angle conversion member 52, the same effect as when the tapered rod is used can be obtained. In addition, the light source device 100 does not necessarily have the angle conversion member 52.

[0085] The parallelization optical system 63 is composed of a collimating lens and the like, and is disposed between the light source device 100 and the integrator optical system 70. The parallelization optical system 63 further reduces the angular distribution of the fluorescence Y emitted from the light source device 100, so that the fluorescence Y with high parallelism is incident on the integrator optical system 70. In addition, when the parallelism of the fluorescence Y emitted from the angle conversion member 52 is sufficiently high, the parallelization optical system 63 may not be disposed.

[0086] The integrator optical system 70 includes a first lens array 61 and a second lens array 101. The integrator optical system 70 functions as a uniform illumination optical system that makes the intensity distribution of the fluorescence Y emitted from the light source device 100 uniform in each of the light modulators 4R and 4G as the illuminated area together with the superposition optical system 103. The fluorescence Y emitted from the parallelization optical system 63 is incident on the first lens array 61. The first lens array 61 and the second lens array 101 provided at the rear stage of the light source device 100 constitute the integrator optical system 70.

[0087] 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 perpendicular to the optical axis AX1 of the first lighting device 20. The plurality of first small lenses 61a divide the fluorescence Y emitted from the angle conversion component 52 into a plurality of partial light beams. The shape of each of the first small lenses 61a is a rectangular shape that is roughly similar to the shape of the image forming area of ​​the light modulating device 4R, 4G. As a result, the partial light beams emitted from the first lens array 61 are efficiently incident on the image forming areas of the light modulating devices 4R, 4G, respectively.

[0088] The fluorescence Y emitted from the first lens array 61 travels toward the second lens array 101. The second lens array 101 is arranged opposite to 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 overlapping optical system 103, images the plurality of first small lenses 61a of the first lens array 61 near the image forming areas of the light modulating devices 4R and 4G, respectively. The plurality of second small lenses 101a are arranged in a matrix in a plane parallel to the YZ plane perpendicular to the optical axis AX1 of the first lighting device 20.

[0089] In the present embodiment, each first small lens 61a of the first lens array 61 and each second small lens 101a of the second lens array 101 have the same size as each other, but may also have different sizes from each other. In addition, in the present embodiment, the first small lens 61a of the first lens array 61 and the second small lens 101a of the second lens array 101 are arranged at positions where the optical axes are consistent with each other, but may also be arranged in a state of being eccentric to each other.

[0090] 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 beam of the fluorescence Y split by the first lens array 61 and emitted from the second lens array 101 into linearly polarized light.

[0091] The polarization conversion element 102 includes: a polarization separation layer not shown in the figure, which directly transmits one linear polarized light component of the polarized light components contained in the fluorescence Y emitted from the light source device 100, and reflects the other linear polarized light component in a direction perpendicular to the optical axis AX1; a reflective layer not shown in the figure, which reflects the other linear polarized light component after being reflected by the polarization separation layer in a direction parallel to the optical axis AX1; and a phase difference plate not shown in the figure, which converts the other linear polarized light component after being reflected by the reflective layer into one linear polarized light component.

[0092] The fluorescence Y transmitted through the polarization conversion element 102 enters the superimposing optical system 103. The superimposing optical system 103 cooperates with the integrator optical system 70 to form a uniform illumination optical system for making the intensity distribution of the fluorescence Y uniform in each of the light modulating devices 4R and 4G as the illuminated areas.

[0093] In the light source device 100 of the present embodiment, when the excitation light E is emitted, the light emitting element 56 of the light source portion 51 generates heat. The heat generated by the light emitting element 56 is transferred to the light source substrate 55. In the case of the present embodiment, the first heat dissipation component 71 is provided on the second surface 55b of the light source substrate 55. Therefore, the rigidity of the second surface 55b side of the light source substrate 55 is relatively high, so it is possible to generate warping convex to the first surface 55a side. In addition, when the temperature of the first surface 55a of the light source substrate 55 is higher than the second surface 55b of the light source substrate 55, it is possible to generate warping convex to the first surface 55a side. That is, the light source substrate 55 is likely to generate warping toward the wavelength conversion component 50 side.

[0094] In addition, in the light source device 100 of the present embodiment, the heat generated by the wavelength conversion member 50 that emits the fluorescence Y is transferred to the support member 54. In the case of the present embodiment, the second heat dissipation member 72 is provided on the back surface 32 of the support member 54. Therefore, the rigidity of the back surface 32 side of the support member 54 is relatively high, so warping convex to the side opposite to the back surface 32 may occur. In addition, when the temperature of the back surface 32 side of the support member 54 is higher than the temperature of the second heat dissipation member 72 side, warping convex to the side opposite to the back surface 32 may occur. That is, the support member 54 may be warped toward the light source unit 51 side.

[0095] When the warping described above occurs, the distance between the light emitting element 56 disposed on the light source substrate 55 and the wavelength conversion member 50 changes, and therefore, the excitation light E emitted from the light emitting element 56 may not be efficiently incident on the wavelength conversion member 50. In addition, since the light emitting element 56 is in contact with the third surface 50c of the wavelength conversion member 50, there is a possibility that it may be defective or damaged.

[0096] On the other hand, the light source device 100 of the present embodiment suppresses the occurrence of the above-mentioned warping, thereby maintaining an appropriate distance between the light emitting element 56 and the wavelength conversion member 50 .

[0097] Hereinafter, the characteristic features of the light source device 100 according to the present embodiment will be described.

[0098] Figure 5 is a top view of the light source device 100 as viewed from the Y-axis direction. Figure 5 In order to facilitate the viewing of the drawings, the light source unit 51 is indicated by a double-dashed line. Figure 5 In the figure, the light emitting element 56 is omitted.

[0099] like Figure 5 As shown, the light source device 100 of this embodiment has a convex portion 30 that makes the light source substrate 55 and the supporting member 54 abut against each other. Specifically, the convex portion 30 is provided on the opposing surface 31 of the supporting member 54 that is opposite to the first surface 55a of the light source substrate 55. The convex portion 30 makes the light source substrate 55 abut against the supporting member 54 in a state where the light emitting element 56 is separated from the supporting member 54 and the wavelength conversion member 50.

[0100] In addition to the protrusion 30 , the support member 54 also has a spring fixing portion 540 , a first receiving portion 541 , a second receiving portion 542 , a third receiving portion 543 , a fourth receiving portion 544 , a fifth receiving portion 545 , a sixth receiving portion 546 , a light source fixing portion 547 and a cutout portion 548 .

[0101] The spring fixing parts 540 are arranged on both sides of the groove part 154 in the Z-axis direction along the short side of the wavelength conversion member 50. The spring fixing parts 540 fix both ends of the pressing member 90 arranged in a state of straddling the wavelength conversion member 50 in the Z-axis direction by screws 96. The cutout parts 548 are used to suppress interference with the connector part 58 provided on the light source substrate 55 when the light source part 51 is fixed to the support member 54.

[0102] The convex portion 30 is arranged on the inner peripheral side of the light source substrate 55 than the fixing portion 59. Here, the inner peripheral side of the light source substrate 55 than the fixing portion 59 means the inner side than the imaginary line passing through the centers of the four through holes 59a constituting the fixing portion 59. That is, in other words, the convex portion 30 is provided at a position closer to the center of the light source substrate 55 than the fixing portion 59.

[0103] The projection 30 is a protruding body that projects in the -Y direction from the support member 54. The projection 30 may be formed integrally with the support member 54, or may be formed of a member different from the support member 54. In the present embodiment, the projection 30 is formed integrally with the support member 54.

[0104] When viewed from above in the Y direction, which is the normal direction of the opposing surface 31 of the support member 54, the convex portion 30 is arranged at a position that does not overlap with the light emitting element 56 and does not abut against the wavelength conversion member 50. According to this structure, it is possible to suppress the occurrence of undesirable situations such as damage to the light emitting surface 56a of the light emitting element 56 due to the contact between the convex portion 30 and the light emitting surface 56a, and the convex portion 30 preventing the excitation light E emitted from the light emitting surface 56a from being incident on the wavelength conversion member 50.

[0105] According to the light source device 100 of the present embodiment, the light source unit 51 and the support member 54 are in contact with each other via the convex portion 30 disposed between the light source substrate 55 and the support member 54. The convex portion 30 functions as a spacer that limits the interval between the light source unit 51 and the support member 54 in the stacking direction of the light source unit 51 and the support member 54, that is, in the Y direction. The convex portion 30 has at least a rigidity to such an extent that it does not deform when sandwiched between the light source unit 51 and the support member 54.

[0106] When the light source substrate 55 is fixed to the supporting member 54, that is, when the fixing portion 59 of the light source substrate 55 is fixed to the light source fixing portion 547 of the supporting member 54 by screws, the convex portion 30 is inserted into the concave portion 60 formed on the first surface 55a of the light source substrate 55. The convex portion 30 abuts against the first insulating layer 551 exposed in the concave portion 60.

[0107] Here, the flatness of the first insulating layer 551 covering the surface 550a of the base material 550 is higher than the flatness of the second insulating layer 553 covering the wiring layer 552. In the case of this embodiment, the convex portion 30 abuts against the first insulating layer 551 having a higher flatness than the second insulating layer 553, so that the support member 54 and the light source substrate 55 are well adhered to each other via the convex portion 30.

[0108] The height of the convex portion 30 in the Y direction is higher than the height of the pressing member 90 in the Y direction that contacts the third surface 50c of the wavelength conversion member 50. The convex portion 30 protrudes further toward the light source unit 51 than the pressing member 90, so that the pressing member 90 is separated from the light source unit 51. The pressing member 90 does not contact the first surface 55a of the light source substrate 55 of the light source unit 51. Therefore, it is possible to suppress the pressure applied by the pressing member 90 to the first surface 55a. Figure 4 The wiring layer 552 shown in the figure may be disconnected or short-circuited.

[0109] The light source fixing part 547 includes a plurality of pedestal parts 547a. The plurality of pedestal parts 547a correspond to the plurality of through holes 59a of the fixing part 59 of the light source substrate 55. That is, the pedestal parts 547a of the light source fixing part 547 and the through holes 59a of the fixing part 59 are the same in number. An internal thread is provided on one pedestal part 547a, and the internal thread fixes a screw inserted through the corresponding through hole 59a.

[0110] In the direction along the Y axis, the heights of the pedestals 547a are equal, and the height of the convex portion 30 is substantially equal to the height of the pedestals 547a. For example, when the gap between the light emitting surface 56a of the light emitting element 56 and the third surface 50c of the wavelength conversion member 50 is set to 0.3 mm, the tolerance of the pedestals 547a and the convex portion 30 is set to be less than ±0.1 mm.

[0111] In the case of the light source substrate 55 of this embodiment, as described above, the protrusion 30 abuts against the first insulating layer 551 exposed in the recess 60, but the first insulating layer 551 is also exposed in the fixing portion 59 abutted against each pedestal portion 547a at the same height as the protrusion 30.

[0112] In this way, by making the heights of the base portion 547a and the protrusion 30 consistent, and making the base portion 547a and the protrusion 30 abut against the first insulating layer 551, the light source substrate 55 and the supporting member 54 are supported in a stable state without shaking by means of the protrusion 30 and the light source fixing portion 547.

[0113] Next, the effects of the projections 30 will be described.

[0114] Here, as a comparative example, consider a case where the convex portion 30 is not provided. In the case of the comparative example structure, the light source substrate 55 is fixed to the support member 54 at the fixing portion 59 provided at the outer peripheral edge portion, so that if a warp convex to the wavelength conversion member 50 side is generated in the light source substrate 55, the portion closer to the inner peripheral side than the fixing portion 59 is closer to the wavelength conversion member 50.

[0115] At this time, the excitation light E emitted from the light emitting element 56 disposed on the first surface 55a of the light source substrate 55 may not be efficiently incident on the wavelength conversion component 50. In particular, the central portion of the light source substrate 55 away from the fixing portion 59 is closest to the wavelength conversion component 50, so the light emitting element 56 may be defective or damaged due to contact with the third surface 50c of the wavelength conversion component 50.

[0116] Figure 6 It is along Figure 5 VI-VI line is a cross-sectional view of the light source device 100 .

[0117] like Figure 6 As shown, according to the light source device 100 of the present embodiment, the light source substrate 55 and the supporting member 54 are in contact with each other by means of the convex portion 30 which is closer to the inner circumference than the fixing portion 59. Therefore, the warping of the light source substrate 55 toward the wavelength conversion member 50 is suppressed. Therefore, the light source device 100 of the present embodiment can make the excitation light E efficiently incident on the wavelength conversion member 50 to generate bright fluorescence Y by appropriately maintaining the distance between the light emitting element 56 and the third surface 50c of the wavelength conversion member 50, and can suppress the occurrence of defects such as defects or damage caused by the contact between the light emitting element 56 and the wavelength conversion member 50.

[0118] The groove portion 154 of the support member 54 has a U-shaped cross section perpendicular to the X-axis direction. The groove portion 154 has a support surface 54s, a first wall surface 54a, and a second wall surface 54b.

[0119] The support surface 54s corresponds to the bottom surface of the groove portion 154. In the case of the present embodiment, the support surface 54s is a surface extending parallel to the XZ plane, and supports the fourth surface 50d of the wavelength conversion component 50. The first wall surface 54a corresponds to one side surface of the groove portion 154, is opposite to the fifth surface 50e of the wavelength conversion component 50, and is separated from the fifth surface 50e. That is, a gap is provided between the first wall surface 54a and the fifth surface 50e of the wavelength conversion component 50. The second wall surface 54b corresponds to the other side surface of the groove portion 154, is opposite to the sixth surface 50f of the wavelength conversion component 50, and is separated from the sixth surface 50f. That is, a gap is provided between the second wall surface 54b and the sixth surface 50f of the wavelength conversion component 50.

[0120] The first wall surface 54a has a first portion 54a1 located on the third surface 50c side and a second portion 54a2 located on the support surface 54s side. The first portion 54a1 extends parallel to the direction perpendicular to the support surface 54s, that is, the XY plane. The second portion 54a2 is inclined so as to approach the fifth surface 50e as it approaches the support surface 54s side from the first portion 54a1 side. In other words, the distance between the second portion 54a2 on the support surface 54s side and the fifth surface 50e is smaller than the distance between the second portion 54a2 on the first portion 54a1 side and the fifth surface 50e.

[0121] The second wall surface 54b has a third portion 54b3 located on the third surface 50c side and a fourth portion 54b4 located on the support surface 54s side. The third portion 54b3 extends parallel to the direction perpendicular to the support surface 54s, that is, the XY plane. The fourth portion 54b4 is inclined so as to approach the sixth surface 50f as it approaches the support surface 54s side from the third portion 54b3 side. In other words, the distance between the fourth portion 54b4 on the support surface 54s side and the sixth surface 50f is smaller than the distance between the fourth portion 54b4 on the third portion 54b3 side and the sixth surface 50f.

[0122] The first wall surface 54a and the second wall surface 54b are respectively formed by the surface of a metal such as aluminum or stainless steel, which is a constituent material of the support member 54. More specifically, the first wall surface 54a and the second wall surface 54b are respectively formed by a surface obtained by mirror-finishing the above-mentioned metal surface. Therefore, the first wall surface 54a and the second wall surface 54b are respectively light reflective and reflect the incident excitation light E. In addition, the first wall surface 54a and the second wall surface 54b may also be respectively formed by other metal films or dielectric multilayer films formed on the surface of a metal such as aluminum or stainless steel.

[0123] As described above, the first wall surface 54a and the second wall surface 54b of the groove portion 154 need to be mirror-finished, so the portion where the groove portion 154 is provided requires processing accuracy compared to other portions in the support member 54. Therefore, the portion where the groove portion 154 is provided in the support member 54 may be formed by different components, and combined with different components that form portions other than the groove portion 154 to form one support member 54. That is, the support member 54 may also be formed by combining a plurality of components. In this way, since the peripheral portions of the groove portion 154 are formed by different components, the processability and processing accuracy of the first wall surface 54a and the second wall surface 54b of the groove portion 154 can be improved.

[0124] The dimension W1 of the light emitting surface 56a of the light emitting element 56 along the Z-axis direction is larger than the width B2 along the Z-axis direction of the wavelength converting member 50. The width of the wavelength converting member 50 in the present embodiment in the Z-axis direction is uniform over the entire length direction.

[0125] Thus, in the Z-axis direction, both ends of the light-emitting surface 56a of the light-emitting element 56 extend outward from the third surface 50c of the wavelength conversion component 50. Specifically, both ends of the light-emitting surface 56a of the light-emitting element 56 extend to a position overlapping with the gap between the fifth surface 50e and the first wall surface 54a and the gap between the sixth surface 50f and the second wall surface 54b. In other words, when the light-emitting surface 56a is observed from the support surface 54s along the Y-axis direction, a portion of the light-emitting surface 56a overlaps with the third surface 50c, and another portion of the light-emitting surface 56a overlaps with the gap between the fifth surface 50e and the first wall surface 54a and the gap between the sixth surface 50f and the second wall surface 54b.

[0126] The first width D2 of the support surface 54s 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. Thus, in the Z-axis direction, both ends of the support surface 54s extend outward from the fourth surface 50d of the wavelength conversion member 50. In other words, when the support surface 54s is observed from the light-emitting surface 56a along the Y-axis direction, a portion of the support surface 54s overlaps with the fourth surface 50d, and another portion of the support surface 54s is exposed outside the fourth surface 50d. In this way, the support surface 54s has an exposed portion exposed outside the wavelength conversion member 50.

[0127] According to the light source device 100 of the present embodiment, a part of the excitation light E2 emitted from the light emitting surface 56a of the light emitting element 56 passes through the gap between the fifth surface 50e of the wavelength conversion member 50 and the first part 54a1, and then enters the second part 54a2 inclined with respect to the support surface 54s. At this time, the excitation light E2 is reflected by the second part 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 54a is easily incident on the fifth surface 50e, so the amount of the excitation light E reflected by the support surface 54s and returned to the light source unit 51 side can be reduced. In addition, a part of the excitation light E is reflected by the first part 54a1 extending perpendicularly to the support surface 54s and enters the fifth surface 50e of the wavelength conversion member 50. As a result, the light source device 100 can be realized in which the utilization efficiency of the excitation light E is high and the fluorescence Y with a desired intensity is easily obtained.

[0128] return Figure 5 , the first receiving portion 541 is a recessed portion connected to the +X direction of the groove portion 154. The first receiving portion 541 penetrates to the outer edge 54d of the support member 54. The first receiving portion 541 receives the first protrusion 151 of the wavelength conversion member 50 that protrudes from the groove portion 154. In addition, the first receiving portion 541 holds the angle conversion member 52 fixed to the first surface 50a of the wavelength conversion member 50. In the present embodiment, the angle conversion member 52 fixed to the first surface 50a of the first protrusion 151 is held by the support member 54.

[0129] The light emitting surface 52 b of the angle conversion member 52 accommodated in the first accommodation portion 541 is flush with the outer edge 54 d of the support member 54 in a plan view.

[0130] The second storage portion 542 is a recessed portion connected to the -X direction of the groove portion 154. The second storage portion 542 penetrates to the outer edge 54d of the support member 54. The second storage portion 542 stores the second protrusion 152 of the wavelength conversion member 50 that protrudes from the groove portion 154. The second storage portion 542 is set in a state that is not connected to the outer edge 54d of the support member 54. The second storage portion 542 stores the second protrusion 152 of the wavelength conversion member 50 that protrudes from the groove portion 154. In the present embodiment, the reflector 53 is provided on the second surface 50b of the second protrusion 152. The second storage portion 542 stores the reflector 53 provided on the second surface 50b of the wavelength conversion member 50.

[0131] The third housing portion 543 is a recessed portion communicating in the +Z direction with the first housing portion 541. The third housing portion 543 houses the holding member 65 that holds the +Z side of the first protrusion 151 of the wavelength conversion member 50 housed in the first housing portion 541.

[0132] The fourth housing portion 544 is a recessed portion communicating with the -Z direction of the first housing portion 541. The fourth housing portion 544 houses the holding member 65 that holds the -Z side of the first protrusion 151 of the wavelength conversion member 50 housed in the first housing portion 541.

[0133] The fifth housing portion 545 is a recessed portion communicating with the second housing portion 542 in the +Z direction. The fifth housing portion 545 houses the holding member 65 that holds the +Z side of the second protruding portion 152 of the wavelength conversion member 50 housed in the second housing portion 542.

[0134] The sixth storage portion 546 is a recessed portion communicating in the −Z direction with the second storage portion 542. The sixth storage portion 546 stores the holding member 65 that holds the −Z side of the second protrusion 152 of the wavelength conversion member 50 stored in the second storage portion 542.

[0135] The pair of holding members 65 that sandwich the first protrusion 151 and the second protrusion 152 of the wavelength conversion member 50 from both sides can adjust the positions of each other in the Z-axis direction.

[0136] In this way, the wavelength conversion member 50 of the present embodiment is held in the groove 154 in a state where the movement of the first protrusion 151 and the second protrusion 152 protruding to the outside of the groove 154 in the Z-axis direction is restricted by the holding member 65 .

[0137] As described above, the light source device 100 of the present embodiment includes: a light source unit 51 including a light source substrate 55 including a first surface 55a and a second surface 55b and a light emitting element 56 provided on the first surface 55a of the light source substrate 55; a wavelength conversion member 50 to which the excitation light E emitted from the light emitting element 56 of the light source unit 51 is incident; a support member 54 that supports the wavelength conversion member 50; a fixing member 59 that is provided on the outer peripheral edge of the light source substrate 55 and holds the light source unit 51 and the support member 54 together in such a manner that the light emitting element 56 and the wavelength conversion member 50 are opposed to each other; and a convex portion 30 that is closer to the inner peripheral side of the light source substrate 55 than the fixing member 59. The support member 54 includes a groove portion 154, the wavelength conversion member 50 is arranged in the groove portion 154, and the light source substrate 55 and the support member 54 abut against each other via the convex portion 30. The convex portion 30 is provided on the opposing surface 31 of the supporting member 54 that is opposed to the first surface 55 a of the light source substrate 55 , and separates the light emitting element 56 from the supporting member 54 and the wavelength conversion member 50 .

[0138] According to the light source device 100 of the present embodiment, the warping of the light source substrate 55 toward the wavelength conversion member 50 is suppressed by having the convex portion 30, so that the distance between the light emitting element 56 and the third surface 50c of the wavelength conversion member 50 can be appropriately maintained. Thus, bright fluorescence Y is generated by efficiently allowing the excitation light E to enter the wavelength conversion member 50, and the occurrence of defects such as defects or damages caused by the light emitting element 56 contacting the wavelength conversion member 50 can be suppressed.

[0139] In addition, the multi-layered light source substrate 55 may also be warped due to residual stress of an insulating layer formed of, for example, a resist film. The light source device 100 of this embodiment is also effective in suppressing the problem caused by warping of the light source substrate 55 due to residual stress.

[0140] The projector 1 of the present embodiment includes the light source device 100 that efficiently extracts bright fluorescent light Y from the wavelength conversion member 50 , and therefore has excellent light utilization efficiency.

[0141] (First Modification)

[0142] Hereinafter, a first modified example of the present embodiment will be described.

[0143] Figure 7 1 is a plan view showing a main part structure of the light source device of the first modification. In the following drawings, the same reference numerals are given to the same components as those of the light source device 100 of the above-mentioned embodiment, and the description thereof is omitted.

[0144] In the light source device 200 of this modification, the convex portion 30 is located in the -Z direction relative to the groove portion 154. The convex portion 30 is located between the groove portion 154 and the cutout portion 548 in the direction along the Z axis. That is, the light source device 200 of this modification is different from the light source device 100 of the above embodiment in the position of the convex portion 30, and the other structures are the same.

[0145] In the light source device 200 of this modification, the convex portion 30 can also suppress the warping of the light source substrate 55 toward the wavelength conversion member 50. Therefore, bright fluorescence Y can be generated and the occurrence of problems caused by the contact between the light source unit 51 and the wavelength conversion member 50 can be suppressed.

[0146] (Second Modification)

[0147] Hereinafter, a second modified example of the present embodiment will be described.

[0148] Figure 81 is a plan view showing a main part structure of a light source device according to a second modification. In the following drawings, the same reference numerals are given to the same components as those of the light source device 100 according to the above embodiment, and the description thereof is omitted.

[0149] In the light source device 300 of this modified example, the light source substrate 55 and the supporting member 54 are fixed at three locations. Figure 8 As shown, in the light source device 200 of this modified example, the fixing portion 159 of the light source substrate 55 is composed of two through holes 159a. Each through hole 159a is respectively provided at two corners along the long side of the -Z side of the rectangular light source substrate 55. In addition, the convex portion 130 is arranged at a position closer to the inner circumference than the fixing portion 159.

[0150] In the case of this modification, the convex portion 130 also serves as a screw fixing portion for fixing the light source substrate 55 and the supporting member 54 with a screw. Therefore, the convex portion 130 has a screw hole 130a for fixing the screw.

[0151] In the light source device 300 of this modification, the convex portion 130 can also suppress the warping of the light source substrate 55 toward the wavelength conversion member 50. Therefore, bright fluorescence Y can be generated and the occurrence of problems caused by the contact between the light source unit 51 and the wavelength conversion member 50 can be suppressed.

[0152] (Third Modification)

[0153] Hereinafter, a third modified example of the present embodiment will be described.

[0154] Fig. 9 1 is a plan view showing a main part structure of a light source device according to a third modification. In the following drawings, the same reference numerals are given to the same components as those of the light source device 100 according to the above embodiment, and the description thereof is omitted.

[0155] The light source device 400 of this modified example makes the convex portion 130 of the light source device 300 of the second modified example be located in the -Z direction relative to the groove portion 154. Specifically, the two through holes 159a constituting the fixing portion 159 of the light source substrate 55 are respectively provided at the two corners of the long side along the +Z side of the rectangular light source substrate 55, and the convex portion 130 is located between the groove portion 154 and the cutout portion 548 in the direction along the Z axis.

[0156] In the light source device 400 of this modification, the convex portion 130 can also suppress the warping of the light source substrate 55 toward the wavelength conversion member 50. Therefore, bright fluorescence Y can be generated and the occurrence of problems caused by the contact between the light source unit 51 and the wavelength conversion member 50 can be suppressed.

[0157] In addition, the technical scope of the present invention is not limited to the above-mentioned embodiment, and various changes can be added within the scope not departing from the gist of the present invention.

[0158] For example, in the light source device 100 of the above embodiment, the case where the protrusion 30 is provided on the supporting member 54 is cited as an example, but the protrusion may also be provided on the first surface 55a of the light source substrate 55. Alternatively, the light emitting element 56 may be separated from the supporting member 54 and the wavelength conversion member 50 by making the protrusions provided on the supporting member 54 and the first surface 55a of the light source substrate 55 butt against each other.

[0159] In the light source device 100 of the above-mentioned embodiment, a case where a pressing component 90 is provided on the supporting component 54 to press the wavelength conversion component 50 against the supporting surface 54s of the groove 154 is cited as an example, but the wavelength conversion component 50 can also be pressed against the supporting surface 54s of the groove 154 by a pressing component provided on the side of the light source substrate 55.

[0160] In the light source device 100 of the above embodiment, the convex portion 30 is inserted into the concave portion 60 of the light source substrate 55, but a structure may be adopted in which the convex portion is abutted against the first surface 55a of the light source substrate 55 without the concave portion. In this case, the upper surface of the seat portion 547a of the support member 54 and the convex portion 30 may be aligned to the same height.

[0161] In the light source device 100 of the above embodiment, it is also possible to configure that the light source substrate 55 and the support member 54 can be fixed by screws at the convex portion 30. According to this structure, by increasing the number of fixing locations between the light source substrate 55 and the support member 54, the light source unit 51 and the support member 54 can be fixed more firmly.

[0162] In the light source device 100 of the above embodiment, the wavelength conversion member 50 has the first protrusion 151 and the second protrusion 152 in the X-axis direction as an example, but only the first protrusion 151 may be provided. In this case, the holding member 65 is arranged only on the first protrusion 151 side.

[0163] In the above embodiment, each wall surface of the groove portion 154 of the support member 54 has a portion perpendicular to the support surface 54s and a portion inclined relative to the support surface 54s, but the shape of the groove portion 154 is not particularly limited, for example, the entire area of ​​the wall surface of the groove portion may be perpendicular to the support surface. In addition, the wall surface of the groove portion may also be curved.

[0164] In the above embodiment, an example of applying the present invention to a light source device having a wavelength conversion component is given, but instead of this structure, the present invention can also be applied to a light source device that transmits incident light without wavelength conversion, for example, by controlling the angle distribution. In this case, the wavelength conversion component of the above embodiment replaces the light guide component, and the light emitted from the light emitting element is emitted from the angle conversion component as light of the original wavelength band.

[0165] In addition, the specific description of the shape, quantity, configuration, material, etc. of each component of the light source device and the projector is not limited to the above-mentioned embodiment and can be appropriately changed. In addition, in the above-mentioned embodiment, an example of mounting the light source device of the present invention on a projector using a liquid crystal panel is shown, but it is not limited to this. The light source device of the present invention can also be applied to a projector using a digital micromirror device as a light modulator. In addition, the projector may not have multiple light modulators, but may only have one light modulator.

[0166] In the above embodiment, the wavelength conversion member 50 is pressed against the support member 54 by two pressing members 90, but the number of pressing members 90 is not limited thereto. For example, if the amount of excitation light E incident from the light emitting element 56 to the wavelength conversion member 50 can be ensured, three or more pressing members 90 may be provided.

[0167] In the above-mentioned embodiment, an example in which the light source device of the present invention is applied to a projector is shown, but the present invention is not limited thereto and can also be applied to lighting equipment, a headlight of a car, and the like.

[0168] The following is a summary of the present disclosure.

[0169] (Note 1)

[0170] A light source device, comprising: a light source portion, which has a light source substrate and a light-emitting element, the light source substrate includes a first surface and a second surface on the side opposite to the first surface, and the light-emitting element is arranged on the first surface of the light source substrate; a light-guiding component, which guides light emitted from the light-emitting element of the light source portion; a supporting component, which supports the light-guiding component; a fixing portion, which is arranged on the outer peripheral edge portion of the light source substrate, so as to fix the light source portion and the supporting component in a manner that the light-emitting element arranged on the first surface of the light source substrate and the light-guiding component are opposed to each other; and a convex portion, which is closer to the inner peripheral side of the light source substrate than the fixing portion, the supporting component has a groove portion, the light-guiding component is arranged in the groove portion, the light source substrate and the supporting component abut against each other by means of the convex portion, and the convex portion is arranged on at least one of the opposing surface of the supporting component opposite to the first surface of the light source substrate and the first surface of the light source substrate, so that the light-emitting element is separated from the supporting component and the light-guiding component.

[0171] According to the light source device of this structure, the warping of the light source substrate toward the light guide component side is suppressed by having a convex portion, so the distance between the light emitting element and the light guide component can be properly maintained. As a result, the light from the light emitting element can be efficiently incident on the light guide component, and the occurrence of undesirable conditions such as defects and breakages caused by the contact between the light emitting element and the light guide component can be suppressed. In addition, according to the light source device of this structure, it is also effective in suppressing undesirable conditions caused by, for example, the warping of the light source substrate caused by residual stress.

[0172] (Note 2)

[0173] The light source device according to Supplementary Note 1, wherein the convex portion is provided on the supporting member.

[0174] According to this configuration, compared with the case where the convex portion is provided on the light source substrate, the height of the convex portion can be ensured more easily.

[0175] (Note 3)

[0176] A light source device according to Note 2, wherein the light source substrate of the light source part includes: a substrate; a first insulating layer, which is arranged on one surface of the substrate; a wiring layer, which is stacked on the side of the first insulating layer opposite to the substrate; and a second insulating layer, which is stacked on the side of the first insulating layer opposite to the substrate in a manner covering at least a portion of the wiring layer, and the protrusion abuts against the first insulating layer.

[0177] The second insulating layer covering the wiring layer has lower flatness than the first insulating layer covering one surface of the base. According to this structure, since the protrusion contacts the first insulating layer having higher flatness than the second insulating layer, the support member can be closely attached to the light source substrate via the protrusion.

[0178] (Note 4)

[0179] The light source device according to any one of Supplementary Notes 1 to 3, further comprising a heat dissipation member fixed to the second surface of the light source substrate of the light source unit.

[0180] According to this structure, heat can be efficiently released from the light source substrate by the heat dissipation member. In addition, the light source substrate can suppress the occurrence of warping that causes the second surface side to bulge by the heat dissipation member.

[0181] (Note 5)

[0182] The light source device according to any one of Supplementary Notes 1 to 4, further comprising a pressing member that presses the light guide member against the supporting member, wherein the convex portion separates the pressing member from the light source portion.

[0183] According to this structure, the light guide member can be brought into good contact with the supporting surface of the groove portion by the pressing member. In addition, since the pressing member does not contact the light source portion, it is possible to suppress defects such as damage caused by contact between the pressing member and the light source portion.

[0184] (Note 6)

[0185] The light source device according to any one of Supplementary Notes 1 to 5, wherein the convex portion is arranged at a position that does not overlap with the light emitting element and does not abut against the light guide member when viewed in plan along a normal direction of the first surface.

[0186] According to this structure, it is possible to suppress the occurrence of problems such as damage of the light emitting element due to contact with the convex portion, and the convex portion preventing the light emitted from the light emitting element from entering the light guide member.

[0187] (Note 7)

[0188] A light source device according to any one of Notes 1 to 6, wherein the light emitting element emits first light having a first wavelength band, and the light guiding component is a wavelength conversion component, which contains a phosphor, converts the first light emitted from the light emitting element into second light having a second wavelength band different from the first wavelength band, and emits the second light.

[0189] According to this configuration, it is possible to realize a light source device that has high utilization efficiency of the first light and can obtain the second light having a desired intensity.

[0190] (Note 8)

[0191] A projector comprising: a light source device as described in any one of Notes 1 to 7; a light modulation device that modulates light emitted from the light source device according to image information; and a projection optical device that projects the light modulated by the light modulation device.

Claims

1. A light source device, comprising: A light source unit, comprising a light source substrate and a light emitting element, wherein the light source substrate comprises a first surface and a second surface opposite to the first surface, and the light emitting element is disposed on the first surface of the light source substrate; a light guide member for guiding light emitted from the light emitting element of the light source portion; a supporting member that supports the light guide member in the groove; a fixing portion provided at an outer peripheral edge portion of the light source substrate to fix the light source portion and the supporting member in such a manner that the light emitting element provided on the first surface of the light source substrate faces the light guide member; and a convex portion located closer to the inner circumference of the light source substrate than the fixing portion, The supporting member has a groove, and the light guide member is arranged in the groove. The light source substrate and the supporting member abut against each other via the convex portion. The convex portion is provided on at least one of a surface of the support member that faces the first surface of the light source substrate and the first surface of the light source substrate, so as to separate the light emitting element from the support member and the light guide member.

2. The light source device according to claim 1, wherein: The convex portion is provided on the supporting member.

3. The light source device according to claim 2, wherein: The light source substrate of the light source unit includes: Base material; A first insulating layer, which is disposed on one surface of the substrate; a wiring layer stacked on a side of the first insulating layer opposite to the substrate; as well as a second insulating layer laminated on a side of the first insulating layer opposite to the substrate so as to cover at least a portion of the wiring layer; The protrusion is in contact with the first insulating layer.

4. The light source device according to claim 1 or 2, wherein: The light source device further includes a heat dissipation member fixed to the second surface of the light source substrate of the light source unit.

5. The light source device according to claim 1 or 2, wherein: The light source device further includes a pressing member that presses the light guide member against the supporting member. The convex portion separates the pressing member from the light source portion.

6. The light source device according to claim 1 or 2, wherein: The convex portion is arranged at a position not overlapping with the light emitting element and not contacting with the light guide member in a plan view along a normal direction of the facing surface of the supporting member.

7. The light source device according to claim 1, wherein: The light emitting element emits a first light having a first wavelength band, The light guide member is a wavelength conversion member that contains a fluorescent substance, converts the first light emitted from the light emitting element into second light having a second wavelength band different from the first wavelength band, and emits the second light.

8. A projector, comprising: The light source device according to any one of claims 1 to 3; a light modulation device for modulating light emitted from the light source device according to image information; as well as A projection optical device projects the light modulated by the light modulation device.

Images