Light source device and display device

Abstract

To suppress an increase in the size of a light source device having a plurality of light emitting portions and a plurality of wavelength conversion members.SOLUTION: A light source device in the present invention comprises: a first wavelength conversion member that emits light of a second wavelength from light of a first wavelength from a first light emitting portion; a second wavelength conversion member that emits the light of the second wavelength from the light of the first wavelength from a second light emitting portion; a first optical member that condenses the light of the first wavelength from the first light emitting portion on the first wavelength conversion member and guides the light of the first wavelength and the light of the second wavelength from the first wavelength conversion member; a second optical member that condenses the light of the first wavelength from the second light emitting portion on the second wavelength conversion member and guides the light of the first wavelength and the light of the second wavelength from the second wavelength conversion member; and a light synthesizing member that synthesizes the light of the first wavelength and the plurality of pieces of light of the second wavelength guided by each of the first optical member and the second optical member. A central axis of the first optical member and a central axis of the second optical member overlap each other, and a central axis of the first wavelength conversion member and a central axis of the second wavelength conversion member overlap each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A light source device has been known that receives light from a light-emitting unit and emits light of a different wavelength from the light from the light-emitting unit. Such a light source device is used in, for example, a display device such as a projector that displays an image on a screen.

[0003] As the light source device, a configuration has been disclosed which has a plurality of light-emitting units and a plurality of wavelength conversion members, guides light from the plurality of light-emitting units to the plurality of wavelength conversion members, and combines the light emitted from each of the plurality of wavelength conversion members according to the guided light using a light combining member and emits the combined light (see, for example, Patent Documents 1 and 2). Summary of the Invention [Problem to be solved by the invention]

[0004] However, the configurations of Patent Documents 1 and 2 have multiple optical systems that guide light from the light-emitting unit to the wavelength conversion member and guide light emitted from the wavelength conversion member to the light-combining member, which can result in the light source device becoming larger.

[0005] An object of the present invention is to prevent an increase in size of a light source device having a plurality of light-emitting sections and a plurality of wavelength conversion members. [Means for solving the problem]

[0006] A light source device according to one aspect of the present invention includes a plurality of light-emitting units including at least a first light-emitting unit and a second light-emitting unit; a first wavelength conversion member including a first wavelength conversion region that receives light of a first wavelength from the first light-emitting unit and emits light of a second wavelength different from the first wavelength; a second wavelength conversion member including a second wavelength conversion region that receives light of the first wavelength from the second light-emitting unit and emits light of the second wavelength; a first optical member that collects the light of the first wavelength from the first light-emitting unit on the first wavelength conversion member and guides the light of the first wavelength and the light of the second wavelength from the first wavelength conversion member; a second optical member that collects the light of the first wavelength from the second light-emitting unit on the second wavelength conversion member and guides the light of the first wavelength and the light of the second wavelength from the second wavelength conversion member; and a second optical member that collects the light of the first wavelength and the light of the second wavelength guided from the first optical member and the second optical member. Before a light combining member that combines the light of the second wavelength, wherein the central axis of the first optical member and the central axis of the second optical member overlap, and the central axis of the first wavelength conversion member and the central axis of the second wavelength conversion member overlap. [Effects of the Invention]

[0007] According to the present invention, it is possible to prevent an increase in size of a light source device having a plurality of light-emitting sections and a plurality of wavelength conversion members. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram illustrating an example of an internal configuration of a light source device according to a first embodiment. [Figure 2] 2 is a view of the first wavelength conversion member of the light source device of FIG. 1 as viewed from the first optical member side. [Figure 3] 2 is a view of the second wavelength conversion member of the light source device of FIG. 1 as viewed from the second optical member side. [Figure 4] FIG. 10 is a cross-sectional view of a first holding member holding a first cooling member according to a modified example. [Figure 5] FIG. 10 is a cross-sectional view of a second holding member holding a second cooling member according to a modified example. [Figure 6]FIG. 10 is a diagram illustrating an internal configuration of a display device according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The following describes in detail the preferred embodiments of the present invention with reference to the accompanying drawings. In the drawings, the same components are designated by the same reference numerals, and redundant explanations will be omitted where appropriate.

[0010] The embodiments described below exemplify light source devices and display devices for embodying the technical ideas of the present disclosure, and the present disclosure is not limited to the embodiments described below. Unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended for illustration purposes only and are not intended to limit the scope of the present disclosure. Furthermore, the sizes and positional relationships of components shown in the drawings may be exaggerated for clarity.

[0011] [First embodiment] <Configuration example of light source device 100> 1 is a diagram illustrating an internal configuration of a light source device 100 according to a first embodiment. The light source device 100 is a device that emits source light L. The source light L is used in a display device such as a projector that displays an image on a screen, for example.

[0012] 1 , the light source device 100 includes a first light-emitting unit 11, a first lens array 12, a first relay lens 13, a first dichroic mirror 14, a first optical member 15, a first wavelength conversion member 16, a first condenser lens 17, and a first light diffusion member 18. The light source device 100 also includes a second light-emitting unit 21, a second lens array 22, a second relay lens 23, a second dichroic mirror 24, a second optical member 25, a second wavelength conversion member 26, a second condenser lens 27, and a second light diffusion member 28. The light source device 100 also includes a first holding member 10, a second holding member 20, a light combining member 30, and a support member 40.

[0013] The first light-emitting unit 11 includes a plurality of semiconductor lasers aligned two-dimensionally, and each of the plurality of semiconductor lasers emits a first laser light L11 toward the first lens array 12. This first laser light L11 has a first wavelength corresponding to blue or ultraviolet light, etc., and is capable of exciting a first wavelength conversion region included in the first wavelength conversion member 16.

[0014] The first laser light L11 emitted from the first light-emitting unit 11 is substantially collimated by the first lens array 12 and reaches the first relay lens 13. The first relay lens 13 includes a lens 131 and a lens 132. The first laser light L11 passes through the lenses 131 and 132 and is incident on the first dichroic mirror 14. The first dichroic mirror 14 is a wavelength-selective mirror that reflects the first laser light L11 of the first wavelength and transmits light other than the first wavelength.

[0015] The first laser light L11 reflected by the first dichroic mirror 14 reaches the first optical member 15 including the lens 151 and the lens 152. The first optical member 15 collects the first laser light L11 from the first dichroic mirror 14 onto the first wavelength conversion member 16.

[0016] The first wavelength conversion member 16 includes a first wavelength conversion region and a first reflection region. The first wavelength conversion region receives the first laser light L11 from the first optical member 15 and emits first fluorescence L12 of a second wavelength different from the first wavelength. The first reflection region reflects the first laser light L11. The first wavelength conversion member 16 emits the first fluorescence L12 by the first wavelength conversion region and emits the first laser light L11 by being reflected by the first reflection region.

[0017] The first optical member 15 guides the first laser light L11 and the first fluorescence L12 from the first wavelength conversion member 16 toward the first collecting lens 17. The first collecting lens 17 collects the guided first laser light L11 and first fluorescence L12 on the first reflecting surface 301 of the light combining member 30 via the first light diffusing member 18. The first light diffusing member 18 includes a light diffusing surface, and diffuses the first laser light L11 and the first fluorescence L12 that pass through it.

[0018] The second light-emitting unit 21 includes a plurality of semiconductor lasers aligned two-dimensionally, and emits second laser light L21 from each of the plurality of semiconductor lasers toward the second lens array 22. This second laser light L21 has a first wavelength corresponding to blue or ultraviolet light, etc., and is capable of exciting a second wavelength conversion region included in the second wavelength conversion member 26.

[0019] The second laser light L21 emitted from the second light-emitting unit 21 is substantially collimated by the second lens array 22 and reaches the second relay lens 23. The second relay lens 23 includes a lens 231 and a lens 232. The second laser light L21 passes through the lenses 231 and 232 and is incident on the second dichroic mirror 24. The second dichroic mirror 24 is a wavelength-selective mirror that reflects the second laser light L21 of the first wavelength and transmits light of wavelengths other than the first wavelength.

[0020] The second laser light L21 reflected by the second dichroic mirror 24 reaches the second optical member 25 including the lens 251 and the lens 252. The second optical member 25 collects the second laser light L21 from the second dichroic mirror 24 onto the second wavelength conversion member 26.

[0021] The second wavelength conversion member 26 includes a second wavelength conversion region and a second reflective region. The second wavelength conversion region receives the second laser light L21 from the second optical member 25 and emits second fluorescence L22 of a second wavelength different from the first wavelength. The second reflective region reflects the second laser light L21. The second wavelength conversion member 26 emits the second fluorescence L22 by the second wavelength conversion region and emits the second laser light L21 by being reflected by the second reflective region.

[0022] The second optical member 25 guides the second laser light L21 and the second fluorescence L22 from the second wavelength conversion member 26 toward the second condenser lens 27. The second condenser lens 27 collects the guided second laser light L21 and second fluorescence L22 on the second reflecting surface 302 of the light combining member 30 via the second light diffusing member 28. The second light diffusing member 28 includes a light diffusing surface and diffuses the second laser light L21 and second fluorescence L22 that pass through it.

[0023] The light combining member 30 reflects the diffused light from the first light diffusing member 18 on a first reflecting surface 301, and reflects the diffused light from the second light diffusing member 28 on a second reflecting surface 302. In this way, the light combining member 30 combines the first laser light L11, the first fluorescent light L12, the second laser light L21, and the second fluorescent light L22. The light combining member 30 is, for example, a rectangular prism, but is not limited to this, and it is sufficient if it can combine the first laser light L11, the first fluorescent light L12, the second laser light L21, and the second fluorescent light L22.

[0024] The light source device 100 can emit the light combined by the light combining member 30 as source light L.

[0025] The first optical member 15 and the second optical member 25 have the same configuration. The first wavelength conversion member 16 and the second wavelength conversion member 26 have the same configuration. Furthermore, a central axis 15c that passes through the center of the first optical member 15 and a central axis 25c that passes through the center of the second optical member 25 overlap with each other. Furthermore, a central axis 16c that passes through the center of the first wavelength conversion member 16 and a central axis 26c that passes through the center of the second wavelength conversion member 26 overlap with each other.

[0026] "Axes overlap" means that the axes are roughly aligned. The "roughly aligned" in "roughly aligned" means that a degree of deviation that is generally considered to be an error is allowed. This also applies to the term "roughly" used below.

[0027] For example, if the first optical member 15 has a substantially circular shape in a planar view when viewed from a direction along its central axis 15c, then the deviation between the central axis 15c of the first optical member 15 and the central axis 25c of the second optical member 25 that is generally considered to be an error is an axial misalignment of ±1 / 5 or less of the maximum diameter of the first optical member 15. Furthermore, if the first wavelength conversion member 16 has a substantially circular shape in a planar view when viewed from a direction along its central axis 16c, then the deviation between the central axis 16c of the first wavelength conversion member 16 and the central axis 26c of the second wavelength conversion member 26 that is generally considered to be an error is an axial misalignment of ±1 / 5 or less of the diameter of the first wavelength conversion member 16.

[0028] The central axis 15c of the first optical member 15 is aligned with the central axis 16c of the first wavelength conversion member 16. The central axis 25c of the second optical member 25 is aligned with the central axis 26c of the second wavelength conversion member 26. Axes "aligned" with each other means that the axes are approximately parallel to each other.

[0029] The central axis 15c of the first optical member 15, the central axis 16c of the first wavelength conversion member 16, the central axis 25c of the second optical member 25, and the central axis 26c of the second wavelength conversion member 26 are in the same plane. In the same plane means being contained in approximately the same plane.

[0030] The first holding member 10 holds the first optical member 15 and the first wavelength conversion member 16. The first holding member 10 is a box-shaped member capable of holding these components inside. These components are held by being fixed to the inside of the first holding member 10 using an adhesive member, a screw member, or the like. The first holding member 10 has an opening. The first holding member 10 is attached to the support member 40 so that the first laser light L11 and the first fluorescence L12 can enter and exit between the first holding member 10 and the support member 40 through this opening.

[0031] The second holding member 20 holds the second optical member 25 and the second wavelength conversion member 26. The second holding member 20 is a box-shaped member capable of holding these components inside. These components are held by being fixed to the inside of the second holding member 20 using an adhesive member, a screw member, or the like. The second holding member 20 has an opening. The second holding member 20 is attached to the support member 40 so that the second laser light L21 and the second fluorescence L22 can enter and exit between the second holding member 20 and the support member 40 through this opening.

[0032] The support member 40 supports the first light-emitting unit 11, the first lens array 12, the first relay lens 13, the first dichroic mirror 14, the first condenser lens 17, the first light diffusing member 18, and the light combining member 30. The support member 40 also supports the second light-emitting unit 21, the second lens array 22, the second relay lens 23, the second dichroic mirror 24, the second condenser lens 27, and the second light diffusing member 28.

[0033] The support member 40 is a box-shaped member that supports the above-mentioned components inside. The support member 40 has an opening between itself and the first holding member 10 through which the first laser light L11 and the first fluorescence L12 are incident or emitted, and an opening between itself and the second holding member 20 through which the second laser light L21 and the second fluorescence L22 are incident or emitted.

[0034] The first holding member 10 and the second holding member 20 are attached to the support member 40 so that the central axis 15c of the first optical member 15 and the central axis 25c of the second optical member 25 overlap, and the central axis 16c of the first wavelength conversion member 16 and the central axis 26c of the second wavelength conversion member 26 overlap.

[0035] Light source device 100 may further include light-emitting units other than first light-emitting unit 11 and second light-emitting unit 21. Each of first light-emitting unit 11 and second light-emitting unit 21 is not limited to a plurality of semiconductor lasers, and may include a single semiconductor laser, or may include one or more light-emitting units that emit incoherent light, such as light-emitting diodes. Light source device 100 does not necessarily have to include first lens array 12, first relay lens 13, first condenser lens 17, first light diffusing member 18, second lens array 22, second relay lens 23, second condenser lens 27, and second light diffusing member 28.

[0036] <Configuration Example of the First Wavelength Converting Member 16 and the Second Wavelength Converting Member 26> Next, an example of the configuration around the first wavelength conversion member 16 and the second wavelength conversion member 26 will be described. Fig. 2 is a view of the first wavelength conversion member 16 in the light source device 100 of Fig. 1 as viewed from the first optical member 15 side. Fig. 3 is a view of the second wavelength conversion member 26 in the light source device 100 of Fig. 1 as viewed from the second optical member 25 side.

[0037] 2, the first wavelength conversion member 16 includes a first wavelength conversion region 161 and a first reflection region 162 on a first rotating substrate 163. The first rotating substrate 163 has a substantially circular shape in a plan view when viewed from its normal direction, and can be rotated around a central axis 16c of the first wavelength conversion member 16. The first wavelength conversion region 161 and the first reflection region 162 are provided so as to each form a part of a ring-shaped region on the first wavelength conversion member 16 in a plan view.

[0038] The first wavelength conversion region 161 is a phosphor region that emits a first fluorescence L12 excited by the first laser light L11. The first reflection region 162 reflects the first laser light L11 collected from the first optical member 15, and thereby emits the first laser light L11 received from the first optical member 15 without converting the first wavelength of the first laser light L11.

[0039] The first optical member 15 is provided so as to be able to irradiate the first wavelength conversion region 161 and the first reflection region 162 of the first wavelength conversion member 16 with the first irradiation spot 150 of the first laser light L11.

[0040] The first wavelength conversion member 16 rotates around the central axis 16c to alternately switch between the first wavelength conversion region 161 and the first reflection region 162, thereby emitting the first laser light L11 and the first fluorescence L12 in a time-division manner.

[0041] The first passing line 160 is a line that passes through the center 160c of the first wavelength conversion member 16 and is perpendicular to the central axis 15c of the first optical member 15. The perpendicularity to the central axis 15c of the first optical member 15 may be approximately perpendicular. In this embodiment, the first passing line 160 is approximately perpendicular to the Y axis that is aligned with the direction of gravity.

[0042] The first wavelength conversion member 16 may further include a phosphor region that emits fluorescence of a wavelength other than the first wavelength and the second wavelength. The first wavelength conversion member 16 is not limited to being rotationally driven, and may be driven in translation in a direction intersecting with the central axis 16c, or may not be driven at all. The planar shape of the first wavelength conversion member 16 is not limited to being approximately circular, and may be approximately elliptical, approximately polygonal, or the like.

[0043] 3, the second wavelength conversion member 26 includes a second wavelength conversion region 261 and a second reflection region 262 on a second rotating substrate 263. The second rotating substrate 263 has a substantially circular shape in a plan view when viewed from its normal direction, and can be rotated around the central axis 26c of the second wavelength conversion member 26. The second wavelength conversion region 261 and the second reflection region 262 are provided so as to form part of a ring-shaped region on the second wavelength conversion member 26 in a plan view.

[0044] The second wavelength conversion region 261 is a phosphor region that emits second fluorescence L22 excited by the second laser light L21. The second reflection region 262 reflects the second laser light L21 collected from the second optical member 25, thereby emitting the second laser light L21 received from the second optical member 25 without converting the first wavelength of the second laser light L21.

[0045] The second optical member 25 is provided so as to be able to irradiate the second wavelength conversion region 261 and the second reflection region 262 of the second wavelength conversion member 26 with the second irradiation spot 250 of the second laser light L21.

[0046] The second wavelength conversion member 26 can rotate around its central axis 26c to alternately switch between the second wavelength conversion region 261 and the second reflection region 262, thereby emitting the second laser light L21 and the second fluorescence L22 in a time-division manner.

[0047] The second passing line 260 is a line that passes through the center 260c of the second wavelength conversion member 26 and is approximately perpendicular to the central axis 25c of the second optical member 25. The second passing line 260 may be approximately perpendicular to the central axis 25c of the second optical member 25. In this embodiment, the second passing line 260 is approximately perpendicular to the Y axis that is aligned with the direction of gravity.

[0048] In this embodiment, the first holding member 10 has a shape that is approximately line-symmetrical about the first passing line 160. The second holding member 20 has a shape that is approximately line-symmetrical about the second passing line 260.

[0049] The second wavelength conversion member 26 may further include a phosphor region that emits fluorescence of a wavelength other than the first wavelength and the second wavelength, in accordance with the first wavelength conversion member 16. The second wavelength conversion member 26 may be driven not only by rotation but also by translation in a direction intersecting with the central axis 26c, in accordance with the first wavelength conversion member 16, or may not be driven at all. The shape of the second wavelength conversion member 26 in a planar view is not limited to a substantially circular shape, and may be a substantially elliptical shape, a substantially polygonal shape, or the like, in accordance with the first wavelength conversion member 16.

[0050] <Effects of the Light Source Device 100> Next, the effects of the light source device 100 will be described.

[0051] Conventionally, a light source device has been disclosed that has a plurality of light-emitting units and a plurality of wavelength conversion members, guides light from the plurality of light-emitting units to the plurality of wavelength conversion members, and combines light emitted from each of the plurality of wavelength conversion members according to the guided light using a light combining member, and emits the combined light. However, in the conventional configuration, because the device has a plurality of optical systems that guide light from the light-emitting units to the wavelength conversion members and guides light emitted from the wavelength conversion members to the light combining member, the distance between the plurality of optical systems or the distance between the plurality of wavelength conversion members becomes long, which tends to make the light source device large.

[0052] Furthermore, optimizing the configuration and layout for each of the multiple optical systems reduces the efficiency of development and design. Furthermore, manufacturing the components included in the optical system for each of the multiple optical systems requires the production of molds for the components. These factors can reduce the manufacturing efficiency of light source devices.

[0053] In the light source device 100 according to this embodiment, the central axis 15c of the first optical member 15 overlaps with the central axis 25c of the second optical member 25, and the central axis 16c of the first wavelength conversion member 16 overlaps with the central axis 26c of the second wavelength conversion member 26. This shortens the distance between the first optical member 15 and the second optical member 25, and also shortens the distance between the first wavelength conversion member 16 and the second wavelength conversion member 26, thereby preventing the light source device 100 from becoming larger.

[0054] The light source device 100 also has a first holding member 10, a second holding member 20, and a support member 40. The first holding member 10 has a shape that is line-symmetrical about a first passing line 160, and the second holding member 20 has a shape that is line-symmetrical about a second passing line 260.

[0055] For example, when the first holding member 10 holding the first wavelength conversion member 16 and the first optical member 15 is rotated 180 degrees around the central axis 16c of the first wavelength conversion member 16, it becomes in the same state as the second holding member 20 holding the second wavelength conversion member 26 and the second optical member 25. Therefore, by disposing the first holding member 10 at the position of the second holding member 20, the first holding member 10 can be used to emit fluorescence based on the second laser light L21 from the second light-emitting unit 21. In other words, the first holding member 10 holding the first wavelength conversion member 16 and the first optical member 15 can be used as a common unit that can emit fluorescence based on light from each of a plurality of light-emitting units including the first light-emitting unit 11, the second light-emitting unit 21, etc.

[0056] For example, if the first holding member 10 holding the first wavelength conversion member 16 and the first optical member 15 can be used as a common unit, it becomes unnecessary to individually develop, design, and manufacture a plurality of optical systems for guiding light from the light-emitting unit to the wavelength conversion member and guiding light emitted from the wavelength conversion member to the light combining member. This makes it possible to improve the manufacturing efficiency of the light source device 100 in this embodiment. Furthermore, the improved manufacturing efficiency also allows the cost of the light source device 100 to be reduced.

[0057] Furthermore, the light source device 100 excites the first wavelength conversion region 161 of the first wavelength conversion member 16 with the first laser light L11 from the first light-emitting unit 11, and excites the second wavelength conversion region 261 of the second wavelength conversion member 26 with the second laser light L21 from the second light-emitting unit 21. This makes it possible to suppress heat generation in the wavelength conversion region and reduce a decrease in wavelength conversion efficiency caused by the wavelength conversion member, compared to when one wavelength conversion region is excited by both the first light-emitting unit 11 and the second light-emitting unit 21. As a result, it is possible to provide a light source device 100 that can emit high-brightness source light L.

[0058] Furthermore, in the light source device 100, the central axis 15c of the first optical member 15, the central axis 16c of the first wavelength conversion member 16, the central axis 25c of the second optical member 25, and the central axis 26c of the second wavelength conversion member 26 are all in the same plane. This shortens the distance between the first optical member 15 and the second optical member 25, and also shortens the distance between the first wavelength conversion member 16 and the second wavelength conversion member 26, thereby preventing the light source device from becoming larger.

[0059] <Modification> Modified examples of the light source device 100 will be described with reference to Fig. 4 and Fig. 5. Fig. 4 is a cross-sectional view illustrating a first holding member 10 having a first cooling member 50 according to a modified example. Fig. 5 is a cross-sectional view illustrating a second holding member 20 having a second cooling member 60 according to a modified example. Fig. 4 shows a cross-section of the first holding member 10 taken along a plane including the central axis 15c of the first optical member 15 and the central axis 16c of the first wavelength conversion member 16. Fig. 5 shows a cross-section of the second holding member 20 taken along a plane including the central axis 25c of the second optical member 25 and the central axis 26c of the second wavelength conversion member 26.

[0060] 4, the first holding member 10 has a first cooling member 50 on the opposite side (negative side of the X axis) from the support member 40 side. The first cooling member 50 is, for example, a heat sink that cools the first holding member 10. The first lens holder 19 is a member that holds the first optical member 15.

[0061] The first holding member 10 has the first cooling member 50, which can suppress heat generation of the first wavelength conversion member 16 inside the first holding member 10, and can ensure high wavelength conversion efficiency by the first wavelength conversion member 16.

[0062] 5, the second holding member 20 has a second cooling member 60 on the opposite side (positive side of the X axis) from the support member 40 side. The second cooling member 60 is, for example, a heat sink that cools the second holding member 20. The second lens holder 29 is a member that holds the second optical member 25.

[0063] By including the second cooling member 60, the second holding member 20 can suppress heat generation of the second wavelength conversion member 26 inside the second holding member 20, and the wavelength conversion efficiency of the second wavelength conversion member 26 can be ensured to be high.

[0064] Furthermore, the first holding member 10 has a first cooling member 50 on the side opposite to the support member 40 side, and the second holding member 20 has a second cooling member 60 on the side opposite to the support member 40 side. Therefore, for example, the first holding member 10 holding the first wavelength conversion member 16 and the first optical member 15 can be used as a common unit, thereby improving the manufacturing efficiency of the light source device 100 and reducing the cost of the light source device 100.

[0065] [Second embodiment] Next, a display device 200 according to a second embodiment will be described.

[0066] 6 is a diagram illustrating an example of the internal configuration of the display device 200. The display device 200 is, for example, a projector that displays an image by projecting the image onto a screen S. The display device 200 includes a housing 210, a light source device 100, a light uniformizing element 70, an illumination optical system 80, a spatial light modulator 81, and a projection optical system 90.

[0067] The housing 210 houses the light source device 100, the light uniformizing element 70, the illumination optical system 80, the spatial light modulator 81, and the projection optical system 90.

[0068] The light source device 100 emits light containing wavelengths corresponding to the colors R (red), G (green), and B (blue), for example.

[0069] The light uniformizing element 70 uniformizes the light by mixing the light emitted from the light source device 100. For the light uniformizing element 70, for example, a light tunnel formed by combining four mirrors, a rod integrator, a fly's eye lens, or the like can be used.

[0070] The illumination optical system 80 substantially uniformly illuminates the spatial light modulator 81 with the light homogenized by the light homogenizing element 70. The illumination optical system 80 has, for example, one or more lenses and one or more reflecting surfaces.

[0071] The spatial light modulator 81 has a plurality of pixels, and generates an image by turning on or off, for each pixel, the image light L that is emitted from the light source device 100 and passes through the light uniformizing element 70 and the illumination optical system 80. The spatial light modulator 81 includes, for example, a light valve such as a digital micromirror device (DMD), a transmissive liquid crystal panel, or a reflective liquid crystal panel.

[0072] The projection optical system 90 enlarges and projects the image generated by the spatial light modulator 81 onto a screen S. The projection optical system 90 includes, for example, one or more lenses.

[0073] The display device 200 can prevent its own size from increasing by including the light source device 100. Furthermore, as the manufacturing efficiency of the light source device 100 improves, the manufacturing efficiency of the display device 200 can be improved and the cost of the display device 200 can be reduced.

[0074] Although examples of embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as described in the claims.

[0075] The light source device 100 is not limited to use in display devices, but can be used as a device for emitting light source light in various optical devices. [Explanation of symbols]

[0076] 10 First holding member 11 First light-emitting part 12 First lens array 13 First relay lens 14 1st dichroic mirror 15 First optical member 15c central axis of first optical member 150 First irradiation spot 16 First wavelength conversion member 16c: central axis of first wavelength conversion member 160 1st passing line 160c Center of the first wavelength conversion member 161 First wavelength conversion region 162 1st reflection area 163 First Rotating Substrate 17 First condenser lens 18 First light diffusing member 19 First lens holder 20 second holding member 21 Second light-emitting part 22 Second lens array 23 Second relay lens 24 Second dichroic mirror 25 Second optical member 25c central axis of second optical member 250 Second irradiation spot 26 Second wavelength conversion member 260 2nd passing line 260c Center of second wavelength conversion member 261 Second Wavelength Conversion Region 262 2nd reflection area 263 Second Rotating Substrate 26c central axis of second wavelength conversion member 27 Second focusing lens 28 Second light diffusing member 29 Second lens holder 30 Photosynthetic Materials 301 1st reflective surface 302 Second reflective surface 40 Support member 50 first cooling member 60 Second cooling member 70 Light uniformizing element 80 Illumination optical system 81 Spatial Light Modulator 90 Projection optical system 100 Light source device 131, 132, 151, 152, 231, 232, 251, 252 lenses 200 Display device 210 cabinet L11 First laser beam L12 1st fluorescence L21 Second laser beam L22 Second fluorescence L light source light [Prior art documents] [Patent documents]

[0077] [Patent Document 1] Patent No. 6283932 [Patent Document 2] Patent No. 6783545

Claims

1. a plurality of light-emitting units including at least a first light-emitting unit and a second light-emitting unit; a first wavelength conversion member including a first wavelength conversion region that receives light of a first wavelength from the first light emitting unit and emits light of a second wavelength different from the first wavelength; a second wavelength conversion member including a second wavelength conversion region that receives light of the first wavelength from the second light emitting unit and emits light of the second wavelength; a first optical member that collects the light of the first wavelength from the first light-emitting unit onto the first wavelength converting member and guides the light of the first wavelength and the light of the second wavelength from the first wavelength converting member; a second optical member that collects the light of the first wavelength from the second light-emitting unit onto the second wavelength converting member and guides the light of the first wavelength and the light of the second wavelength from the second wavelength converting member; a light combining member that combines the light of the first wavelength and the light of the second wavelength that are guided from the first optical member and the second optical member, respectively; a central axis of the first optical member and a central axis of the second optical member overlap with each other; a central axis of the first wavelength conversion member and a central axis of the second wavelength conversion member overlap with each other;

2. A plurality of light-emitting units including at least a first light-emitting unit and a second light-emitting unit; a first wavelength conversion member including a first wavelength conversion region that receives light of a first wavelength from the first light emitting unit and emits light of a second wavelength different from the first wavelength; a second wavelength conversion member including a second wavelength conversion region that receives light of the first wavelength from the second light emitting unit and emits light of the second wavelength; a first optical member that collects the light of the first wavelength from the first light-emitting unit onto the first wavelength converting member and guides the light of the first wavelength and the light of the second wavelength from the first wavelength converting member; a second optical member that collects the light of the first wavelength from the second light-emitting unit onto the second wavelength converting member and guides the light of the first wavelength and the light of the second wavelength from the second wavelength converting member; a light combining member that combines the light of the first wavelength and the light of the second wavelength that are guided from the first optical member and the second optical member, respectively; the first optical member and the second optical member are arranged with an axial misalignment of ±1 / 5 or less of the maximum diameter of the first optical member; a light source device, wherein the central axis of the first wavelength conversion member and the central axis of the second wavelength conversion member are arranged with an axial misalignment of ±1 / 5 or less of a maximum diameter of the first wavelength conversion member.

3. a first holding member that holds the first wavelength conversion member and the first optical member; a second holding member that holds the second wavelength conversion member and the second optical member; a support member that supports at least the plurality of light emitting units and the light combining member, the first holding member has a shape that is line-symmetrical about a first passing line that passes through a center of the first wavelength conversion member and is perpendicular to a central axis of the first optical member, The light source device according to claim 1 , wherein the second holding member has a shape that is line-symmetrical about a second passing line that passes through a center of the second wavelength conversion member and is perpendicular to a central axis of the second optical member.

4. the first holding member has a first cooling member that cools the first holding member on the side opposite to the support member side, The light source device according to claim 3 , wherein the second holding member has a second cooling member that cools the second holding member on a side opposite to the support member side.

5. a central axis of the first optical member is aligned with a central axis of the first wavelength converting member, The light source device according to claim 1 , wherein a central axis of the second optical member is aligned with a central axis of the second wavelength conversion member.

6. 6. The light source device according to claim 1, wherein the central axis of the first optical member, the central axis of the first wavelength conversion member, the central axis of the second optical member, and the central axis of the second wavelength conversion member are in the same plane.

7. a spatial light modulator having a plurality of pixels, which generates an image by turning on or off the light emitted from the light source device according to claim 1 for each pixel; a projection optical system that projects an image generated by the spatial light modulator.

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