Light source device and projector

Abstract

The present invention provides a light source device and a projector, which can improve the heat dissipation of a light guide component. The light source device of the present invention has: a light emitting element that emits light; a light guide component that has a first surface for light emitted from the light emitting element to be incident, a second surface facing a direction opposite to the first surface, a third surface and a fourth surface that intersect the first surface and the second surface and face opposite directions to each other, and a light emitting portion that emits light; a supporting portion that includes a bottom surface that constitutes a holding groove for holding the light guide component and a supporting surface that supports the second surface of the light guide component; a first side wall portion that is arranged opposite to the third surface of the light guide component and includes a first wall surface that constitutes one inner side surface of the holding groove; and a second side wall portion that is arranged opposite to the fourth surface of the light guide component and includes a second wall surface that constitutes another inner side surface of the holding groove, and at least one of the first side wall portion and the second side wall portion is composed of a component different from the supporting portion.

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 substrate; a base member that fixes the substrate of the excitation light source; a fluorescent rod that converts the excitation light emitted from the light emitting element into fluorescent light; and a holding portion that holds the fluorescent rod. In the above light source device, the fluorescent rod is held in a groove formed in the holding portion.

[0004] Patent Document 1: International Publication No. 2020 / 254439

[0005] In the above light source device, the holding portion and the base member are formed as an integral member. Therefore, when the machining accuracy of the groove portion is improved, even if the accuracy of the base member portion is not a problem, the entire member is judged as defective, resulting in a problem of reduced yield.

[0006] In addition, when a high-cost material with excellent thermal conductivity is used as the holding part, the same high-cost material needs to be used on the base member side. In other words, when the holding part and the base member are integrally constructed, it is impossible to select the best material and processing accuracy for each component, so there is a problem of increased cost as a result. Summary of the invention

[0007] In order to solve the above-mentioned problems, a light source device of one embodiment of the present invention comprises: a light-emitting element that emits light; a substrate that supports the light-emitting element; a light-guiding component that has a first surface for the light emitted from the light-emitting element to be incident and a second surface facing a direction opposite to the first surface; a storage component that carries the second surface of the light-guiding component and stores at least a portion of the light-guiding component; and a base component that is composed of a component different from the storage component and fixes the substrate, and the storage component is supported by the base component.

[0008] A projector according to one embodiment of the present invention includes: a light source device according to one embodiment of the present invention; a light modulator that modulates light emitted from the light source device; and a projection optical device that projects the light modulated by the light modulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a diagram showing a schematic configuration of a projector according to the first embodiment.

[0010] Figure 2 It is a schematic structural diagram of the first lighting device.

[0011] Figure 3 It is an exploded perspective view of the light source device.

[0012] Figure 4 This is a top view of the light source device viewed from the Y-axis direction.

[0013] Figure 5 It is along Figure 4 A cross-sectional view of the light source device along line VV.

[0014] Figure 6 It is an exploded perspective view showing the main structure of the light source device according to the second embodiment.

[0015] Description of symbols

[0016] 1: projector; 4B, 4G, 4R: light modulator; 6: projection optical device; 50: wavelength conversion component; 50a: first surface; 160a: front surface; 50b: second surface; 50c: third surface; 50d: fourth surface; 55: substrate; 56: light emitting element; 58, 158: holding component; 59: groove; 59a: first side wall surface; 59b: second side wall surface; 59s: supporting surface; 60, 160: base component; 66: thermal conductive component; 100, 101: light source device; 158b: back surface (of holding component); 159: convex portion; 160b: back surface (of base component); 161: through hole; 162: cutout portion; 165: heat dissipation component; 59a1: first portion; 59a2: second portion; 59b1: third portion; 59b2: fourth portion; Y: fluorescence. DETAILED DESCRIPTION

[0017] Hereinafter, one embodiment of the present invention will be described.

[0018] The projector of this embodiment is an example of a projector using a liquid crystal panel as a light modulation device.

[0019] 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.

[0020] Figure 1 1 is a diagram showing a schematic configuration of a projector 1 according to the present embodiment.

[0021] 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.

[0022] 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 .

[0023] 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.

[0024] In the following drawings, the XYZ orthogonal 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 orthogonal 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] Next, the structure of the second lighting device 21 will be described.

[0029] The second lighting device 21 includes a second light source unit 81, a condenser lens 82, a diffusion plate 83, a rod lens 86, and a relay lens 87. The second light source unit 81 is composed of at least one semiconductor laser. The second light source unit 81 emits blue light LB composed of laser. In addition, the second light source unit 81 is not limited to a semiconductor laser, and can also be composed of an LED that emits blue light.

[0030] The condenser lens 82 is composed of a convex lens. The condenser lens 82 allows the blue light LB emitted from the second 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.

[0031] The blue light LB diffused by the diffuser 83 is incident on the rod lens 86. The rod lens 86 has a prism shape extending along the optical axis AX2 direction of the second lighting device 21. The rod lens 86 has a light incident end face 86a provided at one end and a light emitting end face 86b provided at the other end. The diffuser 83 is fixed to the light incident end face 86a of the rod lens 86 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 86 are as consistent as possible.

[0032] The blue light LB is totally reflected and propagated inside the rod lens 86, and is emitted from the light emission end surface 86b in a state where the uniformity of the illumination distribution is improved. The blue light LB emitted from the rod lens 86 is incident on the relay lens 87. The relay lens 87 allows the blue light LB with the uniformity of the illumination distribution improved by the rod lens 86 to be incident on the reflector 9.

[0033] The shape of the light emitting end surface 86b of the rod lens 86 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 86 is efficiently incident on the image forming region of the light modulator 4B.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Next, the structure of the first lighting device 20 will be described.

[0040] Figure 2 It is a schematic structural diagram of the first lighting device 20.

[0041] like Figure 2 As shown, the first illumination device 20 includes a light source device 100 , an integrating optical system 70 , a polarization conversion element 102 , and a superposition optical system 103 .

[0042] Figure 3 It is a perspective view showing a schematic structure of the light source device 100 .

[0043] like Figure 2 and Figure 3 As shown, the light source device 100 includes a wavelength conversion component 50, a first light source unit 51, an angle conversion component 52, a reflector 53, a base component 60, a holding component 58, a pair of fixing components 64, a position limiting unit 65, a first pressing component 90, and a second pressing component 91. The wavelength conversion component 50 of this embodiment corresponds to the "light guide component" in the claims.

[0044] 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.

[0045] The wavelength conversion member 50 has a first surface 50 a and a second surface 50 b , a third surface 50 c and a fourth surface 50 d , and a fifth surface 50 e and a sixth surface 50 f .

[0046] The fifth surface 50e and the sixth surface 50f intersect the X-axis along the long side of the wavelength conversion member 50 and are located on opposite sides of each other on the X-axis. In the present embodiment, the fifth surface 50e is located on the +X side in the X-axis direction along the X-axis, and the sixth surface 50f is located on the -X side in the opposite direction of the X-axis direction.

[0047] The first surface 50a and the second surface 50b are surfaces intersecting the fifth surface 50e and the sixth surface 50f, and facing opposite sides to 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 first surface 50a is located on one side of the Y axis direction along the Y axis, that is, on the -Y side, and the second surface 50b is located on the other side of the Y axis direction, that is, on the +Y side.

[0048] In the present embodiment, the first surface 50 a of the wavelength conversion member 50 is a surface on which light emitted from a light emitting element 56 of a first light source unit 51 described later is incident.

[0049] The third surface 50c and the fourth surface 50d are surfaces intersecting the first surface 50a and the second surface 50b, and facing opposite sides on the Z axis intersecting the X axis and the Y axis, and in the case of this embodiment, perpendicular to the X axis and the Y axis. In this embodiment, the third surface 50c is located on one side of the Z axis direction, that is, the +Z direction, and the fourth surface 50d is located on the other side of the Z axis direction, that is, the -Z direction.

[0050] In the following description, when the first surface 50a, the second surface 50b, the third surface 50c, and the fourth surface 50d are not distinguished, they may be simply referred to as side surfaces 50a, 50b, 50c, and 50d.

[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 first 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 first surface 50a. The fluorescence Y is guided inside the wavelength conversion component 50 and then emitted from the fifth surface 50e. The excitation light E of this embodiment corresponds to the "first light" of the claims. The fluorescence Y of this embodiment corresponds to the "second light" of the claims. The fifth surface 50e of this embodiment corresponds to the "light emitting unit" of 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 include a single crystal phosphor instead of a polycrystalline phosphor. Alternatively, the wavelength conversion component 50 may be made of fluorescent glass. Alternatively, the wavelength conversion component 50 may 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 includes, 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 first light source unit 51 includes a substrate 55 and a plurality of light emitting elements 56. The first light source unit 51 may also include other optical components such as a light guide plate, a diffuser plate, and a lens. The substrate 55 of the first light source unit 51 is fixed to the base member 60 in a region not shown.

[0056] The plurality of light emitting elements 56 are fixed to one surface 55a of the substrate 55. In the first light source unit 51 of the present embodiment, 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 in 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 first surface 50a of the wavelength conversion member 50, and emits the excitation light E toward the first surface 50a. The first wavelength band is, for example, a wavelength band from blue to violet of 400 nm to 480 nm, and the peak wavelength is, for example, 445 nm.

[0058] like Figure 3 As shown, the holding member 58 is a block-shaped member, and has a groove portion 59 on the front surface 58a for holding a part of the wavelength conversion member 50. The holding member 58 is supported by the base member 60. The holding member 58 is supported by the base member 60. The holding member 58 functions as a heat dissipation member that diffuses the heat generated by the wavelength conversion member 50 supported inside the groove portion 59 and releases it to the outside.

[0059] Figure 4 is a top view of the light source device 100 as viewed from the Y-axis direction. Figure 4 In order to facilitate the observation of the drawings, the first light source unit 51 is omitted.

[0060] The groove portion 59 extends in the X-axis direction along the long side of the wavelength conversion member 50 , and houses a portion of the wavelength conversion member 50 .

[0061] The wavelength conversion member 50 includes a first protrusion 151 protruding from the groove 59 in the +X direction and a second protrusion 152 protruding from the groove 59 in the −X direction.

[0062] The first protrusion 151 is a portion including the ends of the first surface 50a, the second surface 50b, the third surface 50c, the fourth surface 50d, and the fifth surface 50e on the +X direction side. The second protrusion 152 is a portion including the ends of the first surface 50a, the second surface 50b, the third surface 50c, the fourth surface 50d, and the sixth surface 50f on the -X direction side.

[0063] That is, the wavelength conversion member 50 is in a state where both end portions thereof protrude to the outside of the groove portion 59 of the holding member 58 .

[0064] The inventors of the present invention believe that: when a long strip of groove is formed in an integral component by cutting, it is difficult to ensure the surface accuracy of the groove. When the processing accuracy of the groove is improved, even if there is no problem with the accuracy outside the groove, the component as a whole is judged to be defective, resulting in a problem of reduced yield. In addition, in the case of using a high-cost material with excellent thermal conductivity as a retaining component in order to improve the heat dissipation of the wavelength conversion component, a high-cost material is also required on the side of the base component that is integral with the retaining component. That is, an oversized material is used in the base component that does not require high thermal conductivity compared to the retaining component. In this way, when the retaining component and the base component are composed of an integral component, it is impossible to select the best material and processing accuracy for each component, and therefore, the cost is increased as a result.

[0065] Therefore, the present inventors have considered that the above-mentioned problem can be solved by forming a holding member having a groove and a base member for fixing a light source from different members.

[0066] Therefore, in the light source device 100 of the present embodiment, the base member 60 and the holding member 58 are formed of different members.

[0067] Since the holding member 58 functions as a heat dissipation member as described above, it is preferable that the holding member 58 be made of a material having high thermal conductivity.

[0068] In the case of this embodiment, the thermal conductivity of the holding member 58 is higher than the thermal conductivity of the base member 60. The holding member 58 is made of, for example, an aluminum alloy such as A6061 having a thermal conductivity (25°C) of 170 W / (m·k). In addition, the base member 60 is made of, for example, an aluminum die casting such as ADC12 having a thermal conductivity (25°C) of 96 W / (m·k). According to this structure, the heat of the wavelength conversion member 50 is efficiently transferred to the holding member 58, so that the heat dissipation of the wavelength conversion member 50 can be improved.

[0069] According to the light source device 100 of this embodiment, the holding member 58 holding the wavelength conversion member 50 can be made of a material having excellent thermal conductivity, and the base member 60 can be made of a material having relatively low thermal conductivity. That is, optimal materials can be used for the holding member 58 and the base member 60.

[0070] Furthermore, in the light source device 100 of the present embodiment, the holding member 58 and the base member 60 are formed of different parts, so that the processing accuracy required for the groove portion 59 of the holding member 58 can be different from the processing accuracy required for the base member 60. Therefore, the yield rate of the holding member 58 does not affect the yield rate of the base member 60, and thus the reduction in the overall yield rate can be suppressed.

[0071] Therefore, according to the light source device 100 of the present embodiment, it is possible to select the optimum material and processing accuracy for the holding member 58 and the base member 60 , thereby suppressing cost increases and, as a result, achieving cost reduction.

[0072] The base member 60 has a support portion 560 , a spring fixing portion 540 , a first storage portion 541 , a second storage portion 542 , a third storage portion 543 , a fourth storage portion 544 , a fifth storage portion 545 , a sixth storage portion 546 , and a light source fixing portion 547 .

[0073] The support portion 560 is a recessed portion that supports the holding member 58. The support portion 560 restricts movement of the holding member 58 to both sides in the Z-axis direction. The pair of fixing members 64 fixes the position of the holding member 58 relative to the support portion 560. One of the pair of fixing members 64 is arranged at the end of the holding member 58 on the +X side, and the other of the pair of fixing members 64 is arranged at the end of the holding member 58 on the -X side.

[0074] In addition, the support portion 560 may include a positioning pin for positioning the holding member 58 at a predetermined position.

[0075] In the present embodiment, the holding member 58 is supported by the support portion 560 of the base member 60 via the thermally conductive member 66. Examples of the thermally conductive member 66 include a thermally conductive adhesive, a thermally conductive grease, and the like. According to this structure, since the holding member 58 and the support portion 560 are connected via the thermally conductive member 66 in a heat transferable manner, the heat of the holding member 58 can be efficiently transferred to the support portion 560 side. Therefore, by releasing the heat transferred from the wavelength conversion member 50 to the holding member 58 to the support portion 560, the heat dissipation of the wavelength conversion member 50 can be further improved.

[0076] like Figure 2 and Figure 4 As shown, each fixing member 64 is configured to abut against the front face 58a of the -Y side of the holding member 58 supported by the supporting portion 560, and to span in the direction along the Z axis, and both ends of each fixing member 64 are fixed to the base member 60. Each fixing member 64 can be composed of a member with elasticity such as a leaf spring, or can be composed of a plate material without elasticity. The method of fixing each fixing member 64 to the base member 60 is not particularly limited, and any one of screw fastening, bonding, etc. can be used.

[0077] In this way, the pair of fixing members 64 are supported by the supporting portion 560 in a state where the position of the holding member 58 in the Y-axis direction is restricted.

[0078] In addition, in the present embodiment, each fixing member 64 is configured to suppress the retaining member 58 from the -Y side of the support portion 560 toward the +Y side, but a structure may be employed in which the retaining member 58 is pressed toward the inner surface of the support portion 560 from the +Z side or the -Z side using a spring or the like.

[0079] The position restricting portion 65 restricts the position of the wavelength conversion member 50 relative to the base member 60 together with the first pressing member 90. The position restricting portion 65 restricts movement of the wavelength conversion member 50 in the Z-axis direction.

[0080] The position restricting portion 65 holds the first protrusion 151 or the second protrusion 152 protruding from the groove 59 of the holding member 58, and restricts the position of the first protrusion 151 or the second protrusion 152 relative to the groove 59. The position restricting portion 65 includes a pair of restricting members 651 and 652 for holding the first protrusion 151 and a pair of restricting members 653 and 654 for holding the second protrusion 152.

[0081] The limiting member 651 holding one side of the first protrusion 151 is fixed to the third housing portion 543 via a screw 97, and the limiting member 652 on the other side is fixed to the fourth housing portion 544 via a screw 97. The limiting member 653 holding one side of the second protrusion 152 is fixed to the fifth housing portion 545 via a screw 97, and the limiting member 654 on the other side is fixed to the sixth housing portion 546 via a screw 97.

[0082] The pair of limiting members 651 and 652 can adjust their positions in the Z-axis direction by an adjustment mechanism (not shown). Similarly, the pair of limiting members 653 and 654 can adjust their positions in the Z-axis direction by an adjustment mechanism (not shown).

[0083] In this way, the wavelength conversion member 50 of the present embodiment is held in the groove 59 in a state where the movement of the first protrusion 151 and the second protrusion 152 protruding to the outside of the groove 59 in the Z-axis direction is restricted by the position restriction portion 65 .

[0084] The substrate 55 of the first light source unit 51 is fixed to the light source fixing portion 547 of the base member 60 via a screw member, for example.

[0085] The first pressing member 90 limits the position of the wavelength conversion member 50 in the Y-axis direction relative to the holding member 58 inside the groove 59. The first pressing member 90 is arranged opposite to the supporting surface 59s of the groove 59. Thus, the first pressing member 90 limits the movement of the wavelength conversion member 50 in the groove 59 along the Y-axis direction. The first pressing member 90 is made of a material that can be elastically deformed. As an example, the first pressing member 90 is made of a leaf spring made of a metal material, for example, a stainless steel material such as SUS304.

[0086] In the present embodiment, it is preferable that the two first pressing members 90 are respectively arranged at positions that do not overlap with the light emitting elements 56 of the first light source unit 51 .

[0087] The first pressing member 90 presses the wavelength conversion member 50 against the support surface 59 s of the groove portion 59 . The first pressing member 90 is fixed to the base member 60 .

[0088] The reflector 53 is provided on the sixth surface 50f of the wavelength conversion member 50. The reflector 53 guides light into the wavelength conversion member 50 and reflects the fluorescence Y reaching the sixth surface 50f. The reflector 53 is composed of a metal film or a dielectric multilayer film formed on the sixth surface 50f of the wavelength conversion member 50.

[0089] The spring fixing parts 540 are arranged on both sides of the groove 59 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 first pressing member 90 arranged to straddle the wavelength conversion member 50 in the Z-axis direction with screws 96.

[0090] The first receiving portion 541 is a recessed portion connected to the +X direction of the groove portion 59. The first receiving portion 541 penetrates to the outer edge 60d of the base member 60. The first receiving portion 541 receives the first protrusion 151 of the wavelength conversion member 50 that protrudes from the groove portion 59. In addition, the first receiving portion 541 holds the angle conversion member 52 fixed to the fifth surface 50e of the wavelength conversion member 50. In the present embodiment, the angle conversion member 52 fixed to the fifth surface 50e of the first protrusion 151 is held by the base member 60.

[0091] 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 60 d of the base member 60 in a plan view.

[0092] The second storage portion 542 is a recessed portion connected to the -X direction of the groove portion 59. The second storage portion 542 passes through the outer edge 60d of the base member 60. The second storage portion 542 stores the second protrusion 152 of the wavelength conversion member 50 that protrudes from the groove portion 59. In the present embodiment, the reflector 53 is provided on the sixth surface 50f of the second protrusion 152. The second storage portion 542 stores the reflector 53 provided on the sixth surface 50f of the wavelength conversion member 50.

[0093] The second pressing member 91 presses the reflector 53 accommodated in the second housing portion 542 from the outer surface 53t side toward the sixth surface 50f of the wavelength conversion member 50. As a result, the reflecting surface 53r of the reflector 53 is in close contact with the sixth surface 50f of the wavelength conversion member 50. The second pressing member 91 has a pressing portion 911 and an elastic portion 912. The second pressing member 91 is made of a plate-shaped metal material having elastic force, and the pressing portion 911 and the elastic portion 912 are formed integrally. According to this structure, the reflector 53 can be reliably pressed by the pressing portion 911, and a pressing force can be applied to the pressing portion 911 by the elastic portion 912. The pressing portion 911 abuts against the outer surface 53t of the reflector 53 to press the reflector 53.

[0094] The third housing portion 543 is a recessed portion communicating with the first housing portion 541 in the +Z direction. The third housing portion 543 houses the restricting member 651 of the position restricting portion 65 that holds the wavelength conversion member 50 on the +Z side of the first protruding portion 151 housed in the first housing portion 541.

[0095] The fourth housing portion 544 is a recessed portion communicating in the -Z direction with the first housing portion 541. The fourth housing portion 544 houses the restricting member 652 of the position restricting portion 65 that holds the -Z side of the first protruding portion 151 of the wavelength conversion member 50 housed in the first housing portion 541.

[0096] 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 restricting member 653 of the position restricting portion 65 that holds the wavelength conversion member 50 on the +Z side of the second protruding portion 152 housed in the second housing portion 542.

[0097] The sixth housing portion 546 is a recessed portion communicating in the -Z direction with the second housing portion 542. The sixth housing portion 546 houses the restricting member 654 of the position restricting portion 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.

[0098] In the first lighting device 20, when the excitation light E emitted from the first 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, but the fluorescent light Y traveling toward the four side surfaces 50a, 50b, 50c, and 50d is repeatedly totally reflected at multiple locations of the side surfaces 50a, 50b, 50c, and 50d, and travels toward the fifth surface 50e or the sixth surface 50f. The fifth surface 50e emits the fluorescent light Y guided into the wavelength conversion member 50 by total reflection propagation. In the case of the present embodiment, the fluorescent light Y traveling toward the fifth surface 50e is incident on the angle conversion member 52 provided on the fifth surface 50e. The fluorescent light Y traveling toward the sixth surface 50f is reflected by the reflector 53 and travels toward the fifth surface 50e.

[0099] 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 first 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.

[0100] The angle conversion component 52 is disposed on the fifth surface 50e of the wavelength conversion component 50. The angle conversion component 52 is composed of, for example, a tapered rod. The angle conversion component 52 has a light incident surface 52a for the fluorescent light Y emitted from the wavelength conversion component 50 to be incident, 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. The angle conversion component 52 has a quadrangular pyramid shape, and the cross-sectional area perpendicular to the optical axis J extends along the direction of travel 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 component 52. In addition, the optical axis J of the angle conversion component 52 is consistent with the optical axis AX1 of the first lighting device 20.

[0101] 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 fifth surface 50e 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.

[0102] 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.

[0103] 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 fifth surface 50e 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.

[0104] 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.

[0105] A parallelizing optical system 73 composed of a collimating lens or the like is provided between the light source device 100 and the integrator optical system 70. The parallelizing optical system 73 further reduces the angle distribution of the fluorescence Y emitted from the angle conversion member 52, and allows the fluorescence Y with high parallelism to enter 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 parallelizing optical system 73 may not be provided.

[0106] The integrator optical system 70 includes a first lens array 71 and a second lens array 72. 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 73 is incident on the first lens array 71. The first lens array 71 and the second lens array 72 provided at the rear stage of the light source device 100 constitute the integrator optical system 70.

[0107] The first lens array 71 has a plurality of first small lenses 71a. The plurality of first small lenses 71a 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 71a 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 71a 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 71 are efficiently incident on the image forming areas of the light modulating devices 4R, 4G, respectively.

[0108] The fluorescence Y emitted from the first lens array 71 travels toward the second lens array 72. The second lens array 72 is arranged opposite to the first lens array 71. The second lens array 72 has a plurality of second small lenses 72a corresponding to the plurality of first small lenses 71a of the first lens array 71. The second lens array 72, together with the overlapping optical system 103, images the plurality of first small lenses 71a of the first lens array 71 near the image forming areas of the light modulating devices 4R and 4G, respectively. The plurality of second small lenses 72a 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.

[0109] In the present embodiment, each first small lens 71a of the first lens array 71 and each second small lens 72a of the second lens array 72 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 71a of the first lens array 71 and the second small lens 72a of the second lens array 72 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.

[0110] The polarization conversion element 102 converts the polarization direction of the fluorescence Y emitted from the second lens array 72. Specifically, the polarization conversion element 102 converts each partial beam of the fluorescence Y split by the first lens array 71 and emitted from the second lens array 72 into linearly polarized light.

[0111] 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.

[0112] Figure 5 It is along Figure 4 4 is a cross-sectional view of the light source device 100 taken along line VV.

[0113] like Figure 5 As shown in FIG. 1 , the front surface 58a of the holding member 58 is located above (at the −Y side) the first surface 50a of the wavelength conversion member 50 held in the groove 59. Therefore, the fixing member 64 abutting against the front surface 58a of the holding member 58 does not contact the first surface 50a of the wavelength conversion member 50. The first pressing member 90 is disposed on the front surface 58a of the holding member 58. Figure 4 The slit-shaped recessed portion 58a1 shown is in contact with the first surface 50a of the wavelength conversion member 50.

[0114] The groove 59 of the holding member 58 has a U-shaped cross section perpendicular to the X-axis direction, and the groove 59 of the holding member 58 is in a strip shape extending in the X-axis direction.

[0115] The groove portion 59 includes a support surface 59 s that supports the second surface 50 b of the wavelength conversion member 50 , and a first side wall surface 59 a and a second side wall surface 59 b that intersect the support surface 59 s .

[0116] The support surface 59s is a surface extending parallel to the XZ plane, and is a surface constituting the bottom surface of the groove portion 59 that holds the wavelength conversion member 50. The support surface 59s supports the second surface 50b of the wavelength conversion member 50. The first side wall surface 59a and the second side wall surface 59b are flat surfaces along the XY plane, and are surfaces facing opposite directions to each other.

[0117] The first side wall surface 59a corresponds to one side surface of the groove portion 59, is opposite to the third surface 50c of the wavelength conversion component 50, and is separated from the third surface 50c. That is, a gap is provided between the first side wall surface 59a and the third surface 50c of the wavelength conversion component 50. The second side wall surface 59b corresponds to the other side surface of the groove portion 59, is opposite to the fourth surface 50d of the wavelength conversion component 50, and is separated from the fourth surface 50d. That is, a gap is provided between the second side wall surface 59b and the fourth surface 50d of the wavelength conversion component 50.

[0118] The first side wall surface 59a has a first portion 59a1 on the first surface 50a side and a second portion 59a2 on the support surface 59s side. The first portion 59a1 extends parallel to the direction perpendicular to the support surface 59s, that is, the XY plane. The second portion 59a2 is inclined so as to approach the third surface 50c as it approaches the support surface 59s side from the first portion 59a1 side. In other words, the distance between the second portion 59a2 on the support surface 59s side and the third surface 50c is smaller than the distance between the second portion 59a2 on the first portion 59a1 side and the third surface 50c.

[0119] The second side wall surface 59b has a third portion 59b1 on the first surface 50a side and a fourth portion 59b2 on the support surface 59s side. The third portion 59b1 extends parallel to the direction perpendicular to the support surface 59s, that is, the XY plane. The fourth portion 59b2 is inclined so as to approach the fourth surface 50d as it approaches the support surface 59s side from the third portion 59b1 side. In other words, the distance between the fourth portion 59b2 on the support surface 59s side and the fourth surface 50d is smaller than the distance between the fourth portion 59b2 on the third portion 59b1 side and the fourth surface 50d.

[0120] The first side wall surface 59a, the second side wall surface 59b, and the support surface 59s constituting the inner surface of the groove portion 59 are formed by the surface of the aluminum alloy that is the constituent material of the holding member 58. More specifically, the first side wall surface 59a, the second side wall surface 59b, and the support surface 59s are respectively formed by mirror-finished surfaces of the above-mentioned aluminum alloy surface. Therefore, the first side wall surface 59a, the second side wall surface 59b, and the support surface 59s are respectively light reflective and reflect the incident excitation light E. In addition, the first side wall surface 59a, the second side wall surface 59b, and the support surface 59s can also be respectively formed by other metal films or dielectric multilayer films formed on the surface of the aluminum alloy.

[0121] As described above, the first side wall surface 59a and the second side wall surface 59b of the groove portion 59 need to be mirror-finished, so high processing accuracy is required for the holding member 58 that forms the groove portion 59. In the light source device 100 of the present embodiment, as described above, the holding member 58 is a member different from the base member 60, so the processability and processing accuracy of the first side wall surface 59a and the second side wall surface 59b of the groove portion 59 can be easily improved.

[0122] 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 conversion member 50. The width of the wavelength conversion member 50 in the present embodiment in the Z-axis direction is uniform throughout the longitudinal direction.

[0123] 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 third surface 50c and the first side wall surface 59a and the gap between the fourth surface 50d and the second side wall surface 59b. In other words, when the light-emitting surface 56a is observed from the support surface 59s along the Y-axis direction, a portion of the light-emitting surface 56a overlaps with the first surface 50a, and another portion of the light-emitting surface 56a overlaps with the gap between the third surface 50c and the first side wall surface 59a and the gap between the fourth surface 50d and the second side wall surface 59b.

[0124] The first width D2 of the support surface 59s of the groove portion 59 along the Z-axis direction is larger 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 59s extend outward from the second surface 50b of the wavelength conversion member 50. In other words, when the support surface 59s is observed from the light-emitting surface 56a along the Y-axis direction, a portion of the support surface 59s overlaps with the second surface 50b, and another portion of the support surface 59s is exposed outside the second surface 50b. In this way, the support surface 59s has an exposed portion 59r exposed outside the wavelength conversion member 50.

[0125] In the light source device 100 of the present embodiment, a portion of the excitation light E2 emitted from the light emitting surface 56a of the light emitting element 56 passes through the gap between the third surface 50c and the first portion 59a1 of the wavelength conversion component 50, and then enters the second portion 59a2 inclined relative to the support surface 59s. At this time, the excitation light E2 is reflected by the second portion 59a2 and enters the third surface 50c of the wavelength conversion component 50. In this way, the excitation light E2 passing through the gap between the third surface 50c of the wavelength conversion component 50 and the first side wall surface 59a is easily incident on the third surface 50c, so the amount of the excitation light E reflected by the support surface 59s and returned to the first light source unit 51 side can be reduced. In addition, a portion of the excitation light E is reflected by the first portion 59a1 extending perpendicularly to the support surface 59s and enters the third surface 50c of the wavelength conversion component 50. In addition, the excitation light E that has entered between the fourth surface 50 d of the wavelength conversion member 50 and the second side wall surface 59 b is also reflected by the third portion 59 b 1 or the fourth portion 59 b 2 and is incident on the fourth surface 50 d of the wavelength conversion member 50 .

[0126] As described above, according to the light source device 100 of the present embodiment, the excitation light E can be used efficiently and the fluorescence Y having a desired intensity can be obtained.

[0127] As described above, the light source device 100 of the present embodiment includes: the light emitting element 56 that emits the excitation light E; the substrate 55 that supports the light emitting element 56; the wavelength conversion component 50 on which the excitation light E emitted from the light emitting element 56 is incident; the holding component 58 that has the groove 59 that holds at least a portion of the wavelength conversion component 50; and the base component 60 that is composed of a component different from the holding component 58 and fixes the substrate 55. The holding component 58 is supported by the base component 60.

[0128] According to the light source device 100 of the present embodiment, the holding member 58 and the base member 60 are composed of different parts, and therefore, the processing accuracy required for the groove portion 59 of the holding member 58 is different from the processing accuracy required for the base member 60. Therefore, the yield rate of the holding member 58 does not affect the yield rate of the base member 60, and thus the reduction in the yield rate of the entire device can be suppressed.

[0129] Therefore, the light source device 100 of the present embodiment can select the optimum material and processing accuracy for the holding member 58 and the base member 60 , thereby achieving cost reduction.

[0130] In addition, in the light source device 100 of the present embodiment, a material having excellent thermal conductivity can be used as the holding member 58 for holding the wavelength conversion member 50, so that the cooling performance of the wavelength conversion member 50 can be improved. In addition, the groove portion 59 for holding the wavelength conversion member 50 has a large area, so the second surface 50b of the wavelength conversion member 50 is held in the groove portion 59 in a state of good close contact with the support surface 59s. Therefore, the heat generated by the wavelength conversion member 50 is efficiently transferred to the holding member 58 via the support surface 59s. Therefore, the light source device 100 of the present embodiment can further improve the heat dissipation of the wavelength conversion member 50, so that bright fluorescence Y can be emitted from the wavelength conversion member 50.

[0131] The projector 1 of the present embodiment includes the light source device 100 that generates bright fluorescent light Y by selecting the optimal material and processing accuracy, and thus a projector with excellent light utilization efficiency can be realized at low cost.

[0132] (Second Embodiment)

[0133] The light source device of the second embodiment is described below. The difference between this embodiment and the first embodiment lies in the support structure of the holding member in the base member. The support structure is mainly described below, and the same reference numerals are given to the parts common to the first embodiment, and the description is omitted or simplified.

[0134] Figure 6 1 is an exploded perspective view showing the main structure of the light source device 101 of this embodiment. Figure 6In order to facilitate observation of the drawings, illustration of the light source portion that is not related to the description is omitted.

[0135] like Figure 6 As shown, in the light source device 101 of the present embodiment, the base component 160 has: a front side 160a, which fixes the substrate 55 of the first light source unit 51; a back side 160b, which faces in a direction opposite to the front side 160a; a through hole 161, which penetrates the front side 160a and the back side 160b; and a cutout portion 162, which is arranged on the front side 160a and connected to the through hole 161.

[0136] The light source device 101 of the present embodiment further includes a heat dissipation component 165 disposed on the back surface 160b side of the base member 160. The heat dissipation component 165 constitutes a heat sink having a heat dissipation substrate 166 and a plurality of heat dissipation fins 167. The heat dissipation substrate 166 is composed of a metal substrate having excellent heat dissipation properties such as aluminum or copper. The heat dissipation substrate 166 has the same outer shape as the base member 160 and is bonded to the back surface 160b of the base member 160. The plurality of heat dissipation fins 167 are provided on the surface of the heat dissipation substrate 166 opposite to the base member 160.

[0137] The heat dissipation member 165 and the back surface 160 b of the base member 160 may be in direct contact or in indirect contact via a thermally conductive adhesive, thermally conductive beads, or the like.

[0138] The holding member 158 of this embodiment is supported by the through hole 161 of the base member 160. The holding member 158 is inserted into the through hole 161, and the first side surface 158c and the second side surface 158d perpendicular to the front surface 158a and the back surface 158b are in contact with the inner wall surface of the through hole 161. Therefore, the contact area between the holding member 158 and the base member 160 is increased, so by dissipating the heat of the holding member 158 to the base member 160 side, the cooling performance of the wavelength conversion member 50 can be improved.

[0139] In addition, by disposing a thermally conductive adhesive or a thermally conductive filler between the first side surface 158 c and the second side surface 158 d and the inner wall surface of the through hole 161 , the heat of the holding member 158 can be efficiently transferred to the base member 160 side.

[0140] The holding member 158 has a convex portion 159 fixed to the cutout portion 162. The convex portions 159 are arranged on both sides of the groove portion 59 of the holding member 158 in the Z-axis direction. Specifically, a pair of convex portions 159 are provided at the ends of the first side surface 158c and the second side surface 158d on the -Y side, which are perpendicular to the front surface 158a and the back surface 158b of the holding member 158. Therefore, the holding member 158 has a total of four convex portions 159.

[0141] In the case of this embodiment, the convex portion 159 is fixed by fitting into the cutout portion 162 from the -Y side toward the +Y side. Thus, the holding member 158 is fixed to the base member 160 in a state supported by the through hole 161. In addition, the method of fixing the convex portion 159 to the cutout portion 162 is not limited to fitting, and may also be bonding or screwing.

[0142] In a state where the convex portion 159 is fixed to the cutout portion 162, the back surface 158b of the holding member 158 is exposed on the back surface 160b side of the base member 160. In the case of the present embodiment, the back surface 158b of the holding member 158 is coplanar with the back surface 160b of the base member 160. The heat dissipating member 165 is thermally connected to the back surface 158b of the holding member 158 supported in the through hole 161 and exposed on the back surface 160b side. Here, the heat dissipating member 165 is thermally connected to the back surface 158b of the holding member 158, which means that as long as heat conduction can be performed between the heat dissipating member 165 and the back surface 158b, the heat dissipating member 165 and the back surface 158b may be in direct contact, or a thermally conductive adhesive, thermally conductive beads, etc. may be arranged between the heat dissipating member 165 and the back surface 158b.

[0143] According to the light source device 101 of this embodiment, as in the first embodiment, the best material and processing accuracy can be selected for the holding member 158 and the base member 160, so that cost reduction can be achieved. In addition, by fixing the convex portion 159 of the holding member 158 to the cutout portion 162, the holding member 158 and the base member 160 can be simply fixed. In addition, since the heat dissipation member 165 is thermally connected to the holding member 58, the heat of the holding member 158 can be efficiently released. Therefore, by improving the cooling efficiency of the wavelength conversion member 50, bright fluorescence Y can be generated.

[0144] In the present embodiment, an example of fixing the holding member 158 and the base member 160 by fixing the protrusion 159 to the cutout 162 is given, but the holding member 158 exposed on the back surface 160b side of the base member 160 through the through hole 161 may be fixed to the heat dissipation member 165. According to this structure, since the protrusion 159 and the cutout 162 are not required, the structure of the holding member 158 and the structure around the groove 59 of the base member 160 can be simplified.

[0145] In addition, the technical scope of the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the present invention.

[0146] For example, the wavelength conversion component 50 of the above-mentioned embodiment is composed of a quadrangular prism extending along the X-axis and having 6 faces, and an angle conversion component 52 is provided on the fifth surface 50e serving as a light emitting portion. However, the angle conversion component 52 can also be omitted by integrally forming a quadrangular pyramid-shaped light emitting portion at the end of the light emitting side of the wavelength conversion component 50.

[0147] In the above embodiment, the first side wall surface 59a and the second side wall surface 59b of the groove portion 59 are separated from the third surface 50c and the fourth surface 50d of the wavelength conversion component 50, but the third surface 50c or the fourth surface 50d of the wavelength conversion component 50 may also abut against the first side wall surface 59a or the second side wall surface 59b. According to this structure, by increasing the contact area between the wavelength conversion component and the holding component, the heat dissipation of the wavelength conversion component can be further improved.

[0148] In the above embodiment, the first side wall surface 59a and the second side wall surface 59b of the groove portion 59 have a portion perpendicular to the support surface 59s and a portion inclined relative to the support surface 59s, but the shape of the groove portion 59 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.

[0149] 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.

[0150] 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.

[0151] In the above embodiment, the wavelength conversion member 50 is pressed against the holding member 58 by two first pressing members 90, but the number of the first pressing members 90 is not limited thereto. For example, if the amount of the excitation light E incident from the light emitting element 56 to the wavelength conversion member 50 can be ensured, three or more first pressing members 90 may be provided.

[0152] 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.

[0153] The following is a summary of the present disclosure.

[0154] (Note 1)

[0155] A light source device comprises: a light-emitting element that emits light; a substrate that supports the light-emitting element; a light-guiding component on which the light emitted from the light-emitting element is incident; a holding component having a groove that holds at least a portion of the light-guiding component; and a base component that is composed of a component different from the holding component and fixes the substrate, and the holding component is supported by the base component.

[0156] According to the light source device of this structure, the holding member and the base member are composed of different parts, so the processing accuracy required for the groove of the holding member is different from that required for the base member. Therefore, the yield rate of the holding member does not affect the yield rate of the base member, so the reduction of the yield rate of the entire device can be suppressed.

[0157] Therefore, in the light source device of this structure, it is possible to select the optimum material and processing accuracy for the holding member and the base member, thereby achieving cost reduction.

[0158] In addition, in the light source device of this structure, a material with excellent thermal conductivity can be used as a holding member for holding the light guide component, thereby improving the cooling performance of the light guide component. In addition, since the groove portion holding the light guide component has a large area, the light guide component and the supporting surface of the groove portion are in a good and close contact state, so the heat of the light guide component is efficiently transferred to the holding member. Therefore, the light source device of this structure can further improve the heat dissipation of the light guide component, so that bright light can be emitted from the light guide component.

[0159] (Note 2)

[0160] According to the light source device according to Supplementary Note 1, at least a portion of the inner surface of the groove portion reflects the light emitted from the light emitting element toward the light guide member.

[0161] According to this configuration, by allowing light emitted from the light emitting element to enter the light guide member efficiently, it is possible to further improve light utilization efficiency.

[0162] (Note 3)

[0163] According to the light source device described in Appendix 2, the light-guiding component further comprises: a first surface for incident light; a second surface facing in a direction opposite to the first surface; a third surface and a fourth surface, which intersect the first surface and the second surface and face in opposite directions to each other; and a light emitting portion, which emits the light, and the groove portion comprises: a supporting surface, which is opposite to the second surface; a first side wall surface, which is opposite to the third surface and separated from the third surface; and a second side wall surface, which is opposite to the fourth surface and separated from the fourth surface, the first side wall surface having a first portion close to the first surface side and a portion close to the supporting surface. The second part of the side wall has a third part on the first surface side and a fourth part on the supporting surface side, the third part extends in a direction perpendicular to the supporting surface, the fourth part is inclined in a manner approaching the fourth surface as it approaches from the third part side to the supporting surface side, and the first part, the second part, the third part and the fourth part reflect at least a part of the light.

[0164] According to this structure, a portion of the light emitted from the light emitting element passes through the gap between the third surface of the light guide component and the first portion and then enters the second portion inclined relative to the supporting surface. At this time, the light is reflected by the second portion and enters the third surface of the light guide component. In this way, the light passing through the gap between the third surface of the light guide component and the first wall surface is easily incident on the third surface, thereby reducing the amount of light reflected by the supporting surface and returned to the light emitting element side. In addition, a portion of the light is reflected by the first portion extending perpendicular to the supporting surface and enters the third surface of the light guide component.

[0165] Similarly, a portion of the light emitted from the light emitting element passes through the gap between the fourth surface of the light guide component and the third portion and then enters the fourth portion inclined relative to the supporting surface. At this time, the light is reflected by the fourth portion and enters the fourth surface of the light guide component. In this way, the light passing through the gap between the fourth surface of the light guide component and the second wall surface is easily incident on the fourth surface, thereby reducing the amount of light reflected by the supporting surface and returned to the light emitting element side. In addition, a portion of the light is reflected by the third portion extending perpendicularly to the supporting surface and enters the fourth surface of the light guide component.

[0166] Therefore, it is possible to realize a light source device that has high light utilization efficiency and can easily obtain light having a desired intensity.

[0167] (Note 4)

[0168] The light source device according to any one of Supplementary Notes 1 to 3, wherein the base member has a recessed portion that supports the holding member.

[0169] According to this configuration, by arranging the holding member in the recessed portion, it becomes easy to align the holding member and the base member.

[0170] (Note 5)

[0171] In the light source device according to any one of Supplementary Notes 1 to 4, the thermal conductivity of the holding member is higher than the thermal conductivity of the base member.

[0172] According to this configuration, heat can be efficiently dissipated from the light guide member held by the holding member.

[0173] (Note 6)

[0174] In the light source device according to any one of Supplementary Notes 1 to 5, the holding member is supported by the base member via a thermally conductive member.

[0175] According to this configuration, the heat of the holding member is efficiently dissipated toward the base member via the thermally conductive member, and thus the cooling performance of the light guide member can be improved.

[0176] (Note 7)

[0177] According to the light source device described in any one of Notes 1 to 6, the base component has: a front side, which fixes the substrate; a back side, which faces in a direction opposite to the front side; and a through hole, which penetrates the front side and the back side, and the retaining component is supported by the through hole of the base component.

[0178] According to this configuration, the contact area between the holding member and the base member increases, so that the cooling performance of the light guide member can be improved by dissipating the heat of the holding member to the base member side.

[0179] (Note 8)

[0180] The light source device according to any one of Notes 1 to 7 further comprises a heat dissipation component which is arranged on the back side of the base component and is thermally connected to the holding component which is supported by the through hole and exposed on the back side.

[0181] According to this configuration, since the heat dissipation member is provided which is thermally connected to the holding member, the heat of the holding member can be efficiently dissipated. Therefore, by improving the cooling efficiency of the light guide member, bright light can be generated.

[0182] (Note 9)

[0183] According to any one of Supplementary Notes 1 to 8, the base member further includes a cutout portion provided on the front surface and communicating with the through hole, and the holding member includes a protrusion fixed to the cutout portion.

[0184] According to this configuration, the holding member and the base member can be easily fixed by fixing the protruding portion of the holding member to the cutout portion.

[0185] (Note 10)

[0186] A light source device according to any one of Notes 1 to 9, 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.

[0187] According to this configuration, since the wavelength conversion member is efficiently cooled, it is possible to realize a light source device that can obtain the second light having a desired intensity at a low cost.

[0188] (Note 11)

[0189] A projector comprising: a light source device as described in any one of Notes 1 to 10; 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.

[0190] According to the projector of this structure, since it includes the light source device that generates bright light by selecting the optimal material and processing accuracy, it is possible to provide a projector with excellent light utilization efficiency at low cost.

Claims

1. A light source device, comprising: a light emitting element that emits light; a substrate supporting the light emitting element; a light guide member into which the light emitted from the light emitting element is incident; a holding member having a groove portion for holding at least a portion of the light guide member; as well as a base member, which is composed of a member different from the holding member and fixes the substrate, The holding member is supported by the base member.

2. The light source device according to claim 1, wherein: At least a portion of the inner surface of the groove portion reflects the light emitted from the light emitting element toward the light guide member.

3. The light source device according to claim 2, wherein: The light guide member comprises: a first surface for the light to enter; a second surface facing in a direction opposite to the first surface; a third surface and a fourth surface intersecting the first surface and the second surface and facing in opposite directions to each other; and a light emitting portion emitting the light, The groove portion has: a supporting surface, which is opposite to the second surface; a first side wall surface, which is opposite to the third surface and separated from the third surface; and a second side wall surface, which is opposite to the fourth surface and separated from the fourth surface, The first side wall surface includes a first portion close to the first surface and a second portion close to the support surface, the first portion extending in a direction perpendicular to the support surface, and the second portion being inclined so as to approach the third surface as it moves from the first portion to the support surface. The second side wall surface includes a third portion on the first surface side and a fourth portion on the support surface side, the third portion extending in a direction perpendicular to the support surface, and the fourth portion being inclined so as to approach the fourth surface as it approaches the support surface side from the third portion side. The first portion, the second portion, the third portion, and the fourth portion reflect at least a portion of the light.

4. The light source device according to claim 1, wherein: The base member has a recessed portion that supports the holding member.

5. The light source device according to claim 1, wherein: The holding member has a higher thermal conductivity than the base member.

6. The light source device according to claim 1, wherein: The holding member is supported by the base member via a thermally conductive member.

7. The light source device according to claim 1, wherein: The base member has: a front surface, which fixes the substrate; a back surface, which faces the direction opposite to the front surface; and a through hole, which penetrates the front surface and the back surface. The holding member is supported by the through hole of the base member.

8. The light source device according to claim 7, wherein: The light source device further includes a heat dissipation component, which is arranged on the back side of the base component. The heat dissipating member is thermally connected to the holding member supported by the through hole and exposed on the rear surface side.

9. The light source device according to claim 7, wherein: The base member further comprises a cutout portion, which is disposed on the front surface and communicates with the through hole. The holding member has a convex portion fixed to the cutout portion.

10. 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.

11. A projector, comprising: The light source device according to any one of claims 1 to 10; a light modulation device for modulating the light emitted from the light source device; as well as A projection optical device projects the light modulated by the light modulation device.

Images