CN116643441A

CN116643441A - Light source device and display device

Info

Publication number: CN116643441A
Application number: CN202310097601.8A
Authority: CN
Inventors: 秋叶勇斗
Original assignee: Ricoh Co Ltd
Current assignee: Ricoh Co Ltd
Priority date: 2022-02-22
Filing date: 2023-02-08
Publication date: 2023-08-25
Also published as: JP2023122275A

Abstract

The invention relates to a light source device and a display device, and aims to inhibit the enlargement of the light source device. The light source device has a plurality of light emitting sections including first and second light emitting sections; a first wavelength conversion member including a first wavelength conversion region, receiving the first wavelength light from the first light emitting unit, and emitting the second wavelength light; a second wavelength conversion member including a second wavelength conversion region, receiving the first wavelength light from the second light emitting unit, and emitting the second wavelength light; a first optical member for converging the first wavelength light of the first light emitting unit to the first wavelength conversion member and guiding the first and second wavelength light from the first wavelength conversion member; a second optical member for converging the light of the first wavelength of the second light emitting unit onto the second wavelength conversion member and guiding the light of the first and second wavelengths from the second wavelength conversion member; and a light synthesizing member synthesizing the first and second wavelength lights, wherein the central axes of the first and second optical members overlap, and the central axes of the first and second wavelength converting members overlap.

Description

Light source device and display device

Technical Field

The present invention relates to a light source device and a display device.

Background

The conventional light source device has a wavelength conversion member for receiving light from the light emitting unit and emitting light having a wavelength different from that of the light from the light emitting unit. Such a light source device can be used for a display device such as a projector that displays an image on a screen.

For example, patent documents 1 and 2 disclose that the light source device includes a plurality of light emitting units and a plurality of wavelength conversion members, light from the plurality of light emitting units is guided to the plurality of wavelength conversion members, and light emitted from the plurality of wavelength conversion members together with light received by the light guide is synthesized by a light synthesizing member and then emitted.

Patent document 1: JP patent No. 6283932

Patent document 2: JP patent No. 6783545

However, in the configurations disclosed in patent document 1 and patent document 2, there is a problem in that the light source device is large in size because the light source device has a plurality of 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.

Disclosure of Invention

The present invention has been made in view of the above-described problems, and an object of the present invention is to suppress an increase in size of a light source device including a plurality of light emitting units and a plurality of wavelength conversion members.

One aspect of the present invention is a light source device, having: a plurality of light emitting parts including at least a first light emitting part and a second light emitting part; a first wavelength conversion member including a first wavelength conversion region for receiving light of a first wavelength from the first light emitting unit and emitting light of a second wavelength different from the first wavelength; a second wavelength conversion member including a second wavelength conversion region for receiving the light of the first wavelength from the second light emitting section and emitting the light of the second wavelength; a first optical member that condenses the light of the first wavelength from the first light emitting unit onto 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 unit onto 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 light of the second wavelength, which are guided by the first optical member and the second optical member, respectively, the central axis of the first optical member and the central axis of the second optical member overlapping each other, and the central axis of the first wavelength converting member and the central axis of the second wavelength converting member overlapping each other.

The present invention has an effect that an increase in size of a light source device having a plurality of light emitting units and a plurality of wavelength conversion members can be suppressed.

Drawings

Fig. 1 is a schematic view of the internal structure of a light source device according to a first embodiment.

Fig. 2 is a schematic view of the first wavelength conversion member of the light source device of fig. 1 viewed from the first optical member side.

Fig. 3 is a schematic view of a second wavelength conversion member of the light source device of fig. 1, as seen from the second optical member side.

Fig. 4 is a cross-sectional view of a first holding member that holds a first cooling member according to a modification.

Fig. 5 is a cross-sectional view of a second holding member that holds a second cooling member according to a modification.

Fig. 6 is a diagram showing an internal configuration of the display device according to the second embodiment.

Detailed Description

The manner in which the invention can be practiced is described in detail below with reference to the accompanying drawings. In the drawings, the same constituent elements are denoted by the same reference numerals, and repetitive description thereof will be omitted as appropriate.

The embodiments shown below are examples of a light source device and a display device embodying the technical idea of the present invention, and the present invention is not limited to the embodiments shown below. Unless otherwise indicated, the dimensions, materials, shapes, relative positions, etc. of the following components are intended to clarify the scope of the present invention and are not intended to limit the present invention. For convenience of explanation, the sizes, positional relationships, and the like of the components shown in the drawings may be exaggerated.

First embodiment

< construction of light Source device 100 >

Fig. 1 is a schematic diagram of an internal configuration of an example of a light source device 100 according to the first embodiment. The light source device 100 is a device that emits light source light L. The light source light L is used for a display device such as a projector that displays an image on a screen.

As shown in fig. 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 spectroscope 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 further includes a second light emitting unit 21, a second lens array 22, a second relay lens 23, a second beam splitter 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 further includes a first holding member 10, a second holding member 20, a light synthesizing member 30, and a supporting member 40.

The first light emitting unit 11 includes a plurality of semiconductor lasers arranged in two dimensions, and each of the plurality of semiconductor lasers emits the first laser light L11 toward the first lens array 12. The first laser light L11 has a first wavelength corresponding to blue or ultraviolet light, and can excite a first wavelength conversion region included in the first wavelength conversion member 16.

The first laser beam L11 emitted from the first light emitting unit 11 is substantially parallel to 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 is incident on the first spectroscope 14 through the lens 131 and the lens 132. The first spectroscope 14 is a wavelength selective mirror that reflects the first laser light L11 having the first wavelength and transmits light having wavelengths other than the first wavelength.

The first laser light L11 reflected by the first spectroscope 14 reaches the first optical member 15 including the lens 151 and the lens 152. The first optical member 15 condenses the first laser light L11 from the first spectroscope 14 onto the first wavelength conversion member 16.

The first wavelength converting member 16 includes a first wavelength converting region and a first reflective region. The first wavelength conversion region receives the first laser light L11 from the first optical member 15, and emits first fluorescent light L12 having 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 fluorescent light L12 through the first wavelength conversion region, and simultaneously emits the first laser light L11 through reflection by the first reflection region.

The first optical member 15 guides the first laser light L11 and the first fluorescent light L12 from the first wavelength conversion member 16 to the first condenser lens 17. The first condensing lens 17 condenses the first laser light L11 and the first fluorescent light L12, which are received by the light guide, on the first reflecting surface 301 of the light combining member 30 through 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 fluorescent light L12 transmitted through itself.

The second light emitting unit 21 includes a plurality of semiconductor lasers arranged in two dimensions, and the plurality of semiconductor lasers each emit the second laser light L21 toward the second lens array 22. The second laser light L21 has a first wavelength corresponding to blue or ultraviolet light, and can excite a second wavelength conversion region included in the second wavelength conversion member 26.

The second laser beam L21 emitted from the second light emitting unit 21 passes through the second lens array 22 to become substantially parallel light, 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 is incident on the second beam splitter 24 through the lens 231 and the lens 232. The second beam splitter 24 is a wavelength selective mirror that reflects the second laser light L21 having the first wavelength and transmits light having a wavelength other than the first wavelength.

The second laser light L21 reflected by the second beam splitter 24 reaches the second optical member 25 including the lens 251 and the lens 252. The second optical member 25 condenses the second laser light L21 from the second beam splitter 24 onto the second wavelength conversion member 26.

The second wavelength converting member 26 includes a second wavelength converting 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 fluorescent light L22 having a second wavelength different from the first wavelength. The second reflection region reflects the second laser light L21. The second wavelength conversion member 26 emits the second fluorescent light L22 through the second wavelength conversion region, and simultaneously reflects the second laser light L21 through the second reflection region.

The second optical member 25 guides the second laser light L21 and the second fluorescent light L22 from the second wavelength conversion member 26 to the second condenser lens 27. The second condensing lens 27 condenses the second laser light L21 and the second fluorescent light L22, which are guided by the light, on the second reflecting surface 302 of the light combining member 30 through 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 the second fluorescent light L22 transmitted through itself.

The light combining member 30 reflects the diffused light from the first light diffusing member 18 by the first reflecting surface 301, and reflects the diffused light from the second light diffusing member 28 by the second reflecting surface 302. Thus, the optical 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 may be configured to combine the first laser light L11, the first fluorescent light L12, the second laser light L21, and the second fluorescent light L22.

The light source device 100 can emit the light synthesized by the light synthesizing member 30 as light source light L.

The first optical member 15 and the second optical member 25 have the same configuration. The first wavelength converting member 16 and the second wavelength converting member 26 have the same configuration. An axis passing through the center of the first optical member 15, i.e., the center axis 15c, overlaps with an axis passing through the center of the second optical member 25, i.e., the center axis 25 c. An axis passing through the center of the first wavelength converting member 16, i.e., the center axis 16c, overlaps with an axis passing through the center of the second wavelength converting member 26, i.e., the center axis 26c.

Overlapping of axes with respect to each other means that the axes are substantially coincident with each other. Substantially identical "substantially" means that deviations in what is generally considered to be the degree of error are allowed. In this regard, the same applies to the term "substantially" used below.

For example, if the planar shape of the first optical member 15 as viewed in a direction parallel to the central axis 15c of the first optical member 15 is substantially circular, the deviation in the degree of error between the central axis 15c of the first optical member 15 and the central axis 25c of the second optical member 25 is generally considered to be an axis deviation of ±1/5 or less of the maximum diameter of the first optical member 15. Further, if the planar shape is substantially circular as viewed in a direction parallel to the central axis 16c of the first wavelength conversion member 16, 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 is generally considered to be an axial deviation of ±1/5 or less of the diameter of the first wavelength conversion member 16.

The central axis 15c of the first optical component 15 is parallel to the central axis 16c of the first wavelength converting component 16. The central axis 25c of the second optical member 25 is parallel to the central axis 26c of the second wavelength converting member 26. By "parallel" axes to one another is meant that the axes are substantially parallel to one another.

The central axis 15c of the first optical member 15, the central axis 16c of the first wavelength converting member 16, the central axis 25c of the second optical member 25, and the central axis 26c of the second wavelength converting member 26 are in the same plane. "in the same plane" includes substantially in the same plane.

The first holding member 10 holds the first optical member 15 and the first wavelength converting member 16. The first holding member 10 is a box-shaped member, and can hold these constituent parts inside. The above-described respective constituent parts are fixedly held on the inner side of the first holding member 10 by using an adhesive member, a screw member, or the like. The first holding member 10 has an opening. The first holding member 10 is mounted so as to allow the first laser light L11 and the first fluorescent light L12 to enter and exit between the support member 40 through the opening with respect to the support member 40.

The second holding member 20 holds the second optical member 25 and the second wavelength converting member 26. The second holding member 20 is a box-shaped member, and can hold these constituent parts inside. The above-described respective constituent parts are fixedly held on the inner side of the second holding member 20 by 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 fluorescent light L22 can be incident and emitted between the support member 40 through the opening.

The support member 40 supports the first light emitting section 11, the first lens array 12, the first relay lens 13, the first spectroscope 14, the first condenser lens 17, the first light diffusing member 18, and the light combining member 30. The support member 40 supports the second light emitting section 21, the second lens array 22, the second relay lens 23, the second beam splitter 24, the second condenser lens 27, and the second light diffusing member 28.

The support member 40 is a box-shaped member, and supports the above-described respective constituent parts on the inner side thereof. An opening through which the first laser light L11 and the first fluorescent light L12 are incident or emitted is provided between the support member 40 and the first holding member 10, and an opening through which the second laser light L21 and the second fluorescent light L22 are incident or emitted is provided between the second holding member 20.

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

The light source device 100 may further include a light emitting portion other than the first light emitting portion 11 and the second light emitting portion 21. The first light emitting unit 11 and the second light emitting unit 21 are not limited to a plurality of semiconductor lasers, and may have one semiconductor laser, or may have a light emitting unit that emits incoherent light such as one or more light emitting diodes. The light source device 100 does not necessarily need to include the first lens array 12, the first relay lens 13, the first condenser lens 17, the first light diffusion member 18, the second lens array 22, the second relay lens 23, the second condenser lens 27, and the second light diffusion member 28.

< constitution around the first wavelength conversion member 16 and the second wavelength conversion 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 schematic view of the first wavelength conversion member 16 of the light source device 100 of fig. 1 viewed from the first optical member 15 side. Fig. 3 is a schematic view of the second wavelength conversion member 26 of the light source device 100 of fig. 1 viewed from the second optical member 25 side.

As shown in fig. 2, the first wavelength converting member 16 includes a first wavelength converting region 161 and a first reflecting region 162 on a first rotating substrate 163. The first rotary substrate 163 is substantially circular in plan view as seen from the normal direction thereof, and can be rotationally driven about the central axis 16c of the first wavelength conversion member 16. The first wavelength conversion region 161 and the first reflection region 162 are each formed on a part of the first wavelength conversion member 16 as an annular region in plan view.

The first wavelength conversion region 161 is a phosphor region, and emits first fluorescent light L12 excited by the first laser light L11. The first reflection region 162 reflects the first laser light L11 condensed by the first optical member 15, and the first laser light L11 received from the first optical member 15 is emitted without being converted into a first wavelength.

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

The first wavelength conversion member 16 can alternately exchange the first wavelength conversion region 161 and the first reflection region 162 by rotating about the central axis 16c, and emit the first laser light L11 and the first fluorescent light L12 in a time-division manner.

The first pass line 160 passes through the center 160c of the first wavelength converting member 16 and is orthogonal to the center axis 15c of the first optical member 15. The orthogonality with the central axis 15c of the first optical member 15 may be substantially orthogonal. In this embodiment, the first pass line 160 is substantially perpendicular to the Y-axis parallel to the direction of gravity.

The first wavelength converting member 16 may also include a fluorescence region that emits fluorescence at a wavelength other than the first wavelength and the second wavelength. The first wavelength conversion member 16 is not limited to the rotation driving, and may be driven in translation in a direction intersecting the central axis 16c, or may be driven without. The planar shape of the first wavelength conversion member 16 is not limited to a substantially circular shape, and may be a substantially elliptical shape, a substantially polygonal shape, or the like.

As shown in fig. 3, the second wavelength converting member 26 includes a second wavelength converting region 261 and a second reflecting region 262 on a second rotating substrate 263. The second rotary substrate 263 is substantially circular in plan view as viewed in the normal direction, and can be rotationally driven about the central axis 26c of the second wavelength conversion member 26. In a plan view, the second wavelength conversion region 261 and the second reflection region 262 are each a part of the second wavelength conversion member 26 formed as an annular region.

The second wavelength conversion region 261 is a phosphor region, and emits second fluorescent light L22 excited by the second laser light L21. The second reflection region 262 reflects the second laser light L21 condensed by the second optical member 25, and the second laser light L21 received from the second optical member 25 is emitted without being converted into the first wavelength.

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

The second wavelength conversion member 26 can alternately exchange the second wavelength conversion region 261 and the second reflection region 262 by rotating about its center axis 26c, and emit the second laser light L21 and the second fluorescent light L22 in a time-division manner.

The second pass line 260 passes through the center 260c of the second wavelength converting member 26 and is orthogonal to the center axis 25c of the second optical member 25. The orthogonality with the central axis 25c of the second optical member 25 may be substantially orthogonal. In this embodiment, the first pass line 260 is substantially perpendicular to the Y-axis parallel to the direction of gravity.

In the present embodiment, the first holding member 10 has a substantially axisymmetric shape around the first pass line 160. The second holding member 20 has a substantially axisymmetric shape about the second pass line 260.

The second wavelength conversion member 26 may include a phosphor region that emits fluorescence of a wavelength other than the first wavelength and the second wavelength, in cooperation with the first wavelength conversion member 16. The second wavelength conversion member 26 is not limited to the rotation driving, and may be driven in translation in a direction intersecting the central axis 26c, or may be driven without being driven. The planar shape of the second wavelength conversion member 26 is not limited to a substantially circular shape, and may be a substantially elliptical shape, a substantially polygonal shape, or the like in combination with the first wavelength conversion member 16.

< effect of light Source device >

The operation and effects of the light source device 100 will be described below.

The light source device disclosed in the prior art 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, synthesizes light emitted from the plurality of wavelength conversion members in accordance with the light having passed through the light guide, and emits the synthesized light. However, in this conventional configuration, since the plurality of optical systems are provided, the light from the light emitting unit is guided to the wavelength conversion member, and the light emitted from the wavelength conversion member is guided to the light combining member, the distance between the plurality of optical systems or the distance between the plurality of wavelength conversion members is increased, and the light source device tends to be large.

Moreover, if the plurality of optical system configurations and settings are optimized separately, the efficiency of development and design is reduced. Further, if the components in the optical system are manufactured for a plurality of optical systems, a mold or the like for manufacturing the components is required. This reduces the manufacturing efficiency of the light source device.

In contrast, in the light source device 100 according to the present embodiment, the central axis 15c of the first optical member 15 and the central axis 25c of the second optical member 25 overlap each other, 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 each other. In this way, not only the distance between the first optical member 15 and the second optical member 25 but also the distance between the first wavelength conversion member 16 and the second wavelength conversion member 26 can be shortened, thereby suppressing an increase in size of the light source device 100.

The light source device 100 includes a first holding member 10, a second holding member 20, and a support member 40. The first holding member 10 has an axisymmetric shape centered on the first passing line 160, and the second holding member 20 has an axisymmetric shape centered on the second passing line 260.

For example, the first holding member 10 holding the first wavelength converting member 16 and the first optical member 15 rotates 180 degrees around the central axis 16c of the first wavelength converting member 16, and becomes the same state as the second holding member 20 holding the second wavelength converting member 26 and the second optical member 25. In this way, if the first holding member 10 is provided at the position of the second holding member 20, the first holding member 10 can be used in order to emit fluorescence based on the second laser light L21 from the second light emitting portion 21. That is, the first holding member 10 that holds the first wavelength conversion member 16 and the first optical member 15 may be used as a common unit that can emit fluorescence based on light from each of the plurality of light emitting portions including the first light emitting portion 11, the second light emitting portion 21, and the like.

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, there is no need to develop, design, and manufacture an optical system for simultaneously guiding the light emitted from the wavelength conversion member to the light combining member for a plurality of light guides from the light emitting portion to the wavelength conversion member. Therefore, the present embodiment can improve the manufacturing efficiency of the light source device 100. As the manufacturing efficiency increases, the cost of the light source device 100 can be reduced.

In the light source device 100, the first laser light L11 from the first light emitting unit 11 excites the first wavelength conversion region 161 of the first wavelength conversion member 16, and the second laser light L21 from the second light emitting unit 21 excites the second wavelength conversion region 261 of the second wavelength conversion member 26. Therefore, compared with the case where the first light emitting portion 11 and the second light emitting portion 21 excite one wavelength conversion region in common, heat generation in the wavelength conversion region can be suppressed, and a decrease in wavelength conversion efficiency caused by the wavelength conversion member can be reduced. As a result, the light source device 100 that emits the light source light L of high brightness can be provided.

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 positioned on the same plane. This makes it possible to shorten the distance between the first optical member 15 and the second optical member 25, and also the distance between the first wavelength conversion member 16 and the second wavelength conversion member 26, so that it is possible to suppress an increase in the size of the light source device.

< modification >

A modification of the light source device 100 is described below with reference to fig. 4 and 5. Fig. 4 is a cross-sectional view of a modification of the first holding member 10 having the first cooling member 50. Fig. 5 is a cross-sectional view of a modification of the second holding member 20 having the second cooling member 60. Fig. 4 shows a cross section of the first holding member 10 cut with 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 cut with 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.

As shown in fig. 4, the first holding member 10 has a first cooling member 50 on the opposite side (X-axis negative side) from the supporting member 40. The first cooling member 50 is, for example, a heat sink for cooling the first holding member 10.

The first lens holder 19 is for holding the first optical member 15.

The first holding member 10 has the first cooling member 50, so that heat generation of the first wavelength conversion member 16 inside the first holding member 10 can be suppressed, and high wavelength conversion efficiency of the first wavelength conversion member 16 can be ensured.

As shown in fig. 5, the second holding member 20 has a second cooling member 60 on the opposite side (X-axis side) from the support member 40. The second cooling member 60 is, for example, a heat sink for cooling the second holding member 20. The second lens holder 29 is for holding the second optical member 25.

The second holding member 20 includes the second cooling member 60, so that heat generation of the second wavelength conversion member 26 inside the second holding member 20 can be suppressed, and a high wavelength conversion efficiency of the second wavelength conversion member 26 can be ensured.

The first holding member 10 has a first cooling member 50 on the side opposite to the support member 40, and the second holding member 20 has a second cooling member 60 on the side opposite to the support member 40. 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.

Second embodiment

Next, a display device 200 according to a second embodiment will be described.

Fig. 6 is a schematic diagram showing the internal configuration of the device 200. The display device 200 is, for example, a projector, and displays an image by projecting the image on the screen S. The display device 200 includes a housing 210, a light source device 100, a light homogenizing element 70, an illumination optical system 80, a spatial light modulator 81, and a projection optical system 90.

The housing 210 accommodates therein the light source device 100, the light homogenizing element 70, the illumination optical system 80, the spatial light modulator 81, and the projection optical system 90.

The light source device 100 emits light including wavelengths corresponding to respective colors of R (red), G (green), and B (blue).

The light homogenizing element 70 homogenizes light by mixing the light emitted from the light source device 100. The light homogenizing element 70 may use, for example, a light tunnel composed of four mirrors, a rod integrator, a fly eye lens, or the like.

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, one or more reflection surfaces, or the like.

The spatial light modulator 81 has a plurality of pixels, and generates an image by turning on or off the image light L emitted from the light source device 100 through the light equalizing element 70 and the illumination optical system 80 for each pixel. The spatial light modulator 81 includes, for example, a digital micromirror device (DMD; digital Micromirror Device), a transmissive liquid crystal panel, a reflective liquid crystal panel, or the like.

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

The display device 200 can suppress the increase in size by having the light source device 100. As the manufacturing efficiency of the light source device 100 increases, the display device 200 can also increase the manufacturing efficiency while reducing the cost.

The examples of the embodiments of the present invention have been described above, but the present invention is not limited to these specific embodiments, and various modifications and alterations are allowed within the gist of the present invention described in the claims.

The light source device 100 may be used as a device that emits light source light in various optical devices, in addition to a display device.

Description of the reference numerals

10. First holding part

11. First light-emitting part

12. First lens array

13. First relay lens

14. First spectroscope

15. First optical component

15c center axis of first optical component

150. First irradiation point

16. First wavelength conversion member

16c central axis of the first wavelength converting member

160. First pass line

160c center of first wavelength converting member

161. First wavelength conversion region

162. A first reflective region

163. First rotary base plate

17. First condenser lens

18. First light diffusion member

19. First lens holder

20. Second holding member

25. Second irradiation point

26. Second wavelength conversion member

260. Second pass line

260c center of the second wavelength converting member

261. Second wavelength conversion region

262. A second reflective region

263. Second rotary base plate

26c central axis of the second wavelength converting member

27. Second condenser lens

28. Second light diffusion member

29. Second lens holder

30. Light synthesizing component

301. A first reflecting surface

302. A second reflecting surface

40. Support member

50. First cooling part

60. Second cooling part

70. Light homogenizing 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 lens

200. Display device

210. Shell body

L11 first laser

L12 first fluorescence

L21 second laser L22 second fluorescent L light source light 250

Claims

1. A light source device is characterized by comprising

A plurality of light emitting parts including at least a first light emitting part and a second light emitting part;

a first wavelength conversion member including a first wavelength conversion region for receiving light of a first wavelength from the first light emitting unit and emitting light of a second wavelength different from the first wavelength;

a second wavelength conversion member including a second wavelength conversion region for receiving the light of the first wavelength from the second light emitting section and emitting the light of the second wavelength;

a first optical member that condenses the light of the first wavelength from the first light emitting unit onto 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 unit onto 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 combining member configured to combine the light of the first wavelength and the light of the second wavelength, which are guided by the first optical member and the second optical member, respectively,

the central axis of the first optical member and the central axis of the second optical member overlap each other, and the central axis of the first wavelength conversion member and the central axis of the second wavelength conversion member overlap each other.

2. A light source device according to claim 1, comprising

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; and

a support member that supports at least the plurality of light emitting sections and the light synthesizing member,

the first holding member has an axisymmetric shape centered on a first passing line passing through the center of the first wavelength conversion member and orthogonal to the central axis of the first optical member,

the second holding member has an axisymmetric shape centered on a second passing line passing through the center of the second wavelength conversion member and orthogonal to the center axis of the second optical member.

3. A light source device according to claim 2, wherein,

the first holding member has a first cooling member for cooling the first holding member on the opposite side of the supporting member,

the second holding member has a second cooling member for cooling the second holding member on the opposite side of the support member.

4. A light source device according to any one of claims 1 to 3,

the central axis of the first optical component is along the central axis of the first wavelength converting component,

the central axis of the second optical component is along the central axis of the second wavelength converting component.

5. A light source device according to any one of claims 1 to 4, 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 located in the same plane.

6. A display device, comprising

A spatial light modulator having a plurality of pixels therein, which generates an image by turning on or off light emitted from the light source device according to any one of claims 1 to 5; and

and a projection optical system which projects an image generated through the spatial light modulator.