JP7806544B2 - Light source device and display device - Google Patents

Description

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

Conventionally, light source devices have been known that have a wavelength conversion member that receives light from a light-emitting unit and emits light with a wavelength different from that of the light from the light-emitting unit. Such light source devices are used, for example, in display devices such as projectors that display images on a screen.

The light source device disclosed has multiple light-emitting units and multiple wavelength conversion members, guides light from the multiple light-emitting units to the multiple wavelength conversion members, and combines the light emitted from each of the multiple wavelength conversion members according to the guided light using a light combining member before emitting the combined light (see, for example, Patent Documents 1 and 2).

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.

The present invention aims to prevent the size of a light source device having multiple light-emitting elements and multiple wavelength conversion members from increasing.

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; and a second wavelength conversion member that collects the light of the first wavelength from the first light-emitting unit on the first wavelength conversion member and converts the light of the first wavelength and the light of the second wavelength from the first wavelength conversion member into a light beam. a first optical member that guides long-wavelength light; a second optical member that collects 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 that combines the light of the first wavelength and the light of the second wavelength guided from the first optical member and the second optical member, respectively, wherein a central axis of the first optical member and a central axis of the second optical member overlap, and a central axis of the first wavelength conversion member and a central axis of the second wavelength conversion member overlap.

This invention makes it possible to prevent a light source device having multiple light-emitting elements and multiple wavelength conversion members from becoming too large.

1 is a diagram illustrating an internal configuration of a light source device according to a first embodiment. 2 is a view of a first wavelength conversion member of the light source device of FIG. 1 as viewed from the first optical member side. 2 is a view of a second wavelength conversion member of the light source device of FIG. 1 as viewed from the second optical member side. FIG. 10 is a cross-sectional view of a first holding member holding a first cooling member according to a modified example. FIG. 10 is a cross-sectional view of a second holding member holding a second cooling member according to a modified example. FIG. 10 is a diagram illustrating an internal configuration of a display device according to a second embodiment.

The following describes in detail the embodiments of the invention with reference to the drawings. In each drawing, identical components are designated by the same reference numerals, and duplicate explanations will be omitted where appropriate.

The embodiments described below are examples of light source devices and display devices that embody the technical concepts of the present disclosure, and are not intended to limit the present disclosure to the embodiments described below. Unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended for illustrative 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.

[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.

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 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.

The first light-emitting unit 11 includes multiple semiconductor lasers aligned two-dimensionally, and each of the multiple 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.

The first laser light L11 emitted from the first light emitter 11 is approximately 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.

The first laser light L11 reflected by the first dichroic mirror 14 reaches the first optical member 15, which includes lenses 151 and 152. The first optical member 15 focuses the first laser light L11 from the first dichroic mirror 14 onto the first wavelength conversion member 16.

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 from the first wavelength conversion region and emits the first laser light L11 by reflection from the first reflection region.

The first optical member 15 guides the first laser light L11 and first fluorescence L12 from the first wavelength conversion member 16 toward the first focusing lens 17. The first focusing lens 17 focuses the guided first laser light L11 and first fluorescence L12 onto 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 first fluorescence L12 that pass through it.

The second light-emitting unit 21 includes multiple semiconductor lasers aligned two-dimensionally, and each of the multiple semiconductor lasers emits second laser light L21 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 the second wavelength conversion region included in the second wavelength conversion member 26.

The second laser light L21 emitted from the second light emitter 21 is approximately 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.

The second laser light L21 reflected by the second dichroic mirror 24 reaches the second optical member 25, which includes lenses 251 and 252. The second optical member 25 focuses the second laser light L21 from the second dichroic mirror 24 onto the second wavelength conversion member 26.

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 from the second wavelength conversion region and emits the second laser light L21 by reflection from the second reflective region.

The second optical member 25 guides the second laser light L21 and second fluorescence L22 from the second wavelength conversion member 26 toward the second condenser lens 27. The second condenser lens 27 focuses the guided second laser light L21 and second fluorescence L22 onto 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.

The light combining member 30 reflects the diffused light from the first light diffusing member 18 on the first reflecting surface 301, and reflects the diffused light from the second light diffusing member 28 on the second reflecting surface 302. In this way, the light combining member 30 combines the first laser light L11, the first fluorescence L12, the second laser light L21, and the second fluorescence L22. The light combining member 30 is, for example, a rectangular prism, but is not limited to this, and may be any member capable of combining the first laser light L11, the first fluorescence L12, the second laser light L21, and the second fluorescence L22.

The light source device 100 can emit the light combined by the light combining 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 conversion member 16 and the second wavelength conversion member 26 have the same configuration. Furthermore, the central axis 15c, which is the axis passing through the center of the first optical member 15, overlaps with the central axis 25c, which is the axis passing through the center of the second optical member 25. Furthermore, the central axis 16c, which is the axis passing through the center of the first wavelength conversion member 16, overlaps with the central axis 26c, which is the axis passing through the center of the second wavelength conversion member 26.

When axes overlap, it 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.

For example, if the first optical member 15 has a substantially circular shape in a planar view when viewed 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 no more than ±1/5 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 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 no more than ±1/5 of the diameter of the first wavelength conversion member 16.

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. "Along" the axes means that the axes are approximately parallel to each other.

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.

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 each of these components inside. Each of these components is held by being fixed to the inside of the first holding member 10 using adhesive or screw members, etc. 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.

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. Each of these components is held by being fixed to the inside of the second holding member 20 using adhesive or screw members, etc. 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.

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 condensing 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 condensing lens 27, and the second light diffusing member 28.

The support member 40 is a box-shaped member that supports the above-mentioned components inside. The support member 40 has an opening between it and the first holding member 10 through which the first laser light L11 and the first fluorescence L12 enter or exit, and an opening between it and the second holding member 20 through which the second laser light L21 and the second fluorescence L22 enter or exit.

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.

The light source device 100 may further include light-emitting units other than the first light-emitting unit 11 and the second light-emitting unit 21. Each of the first light-emitting unit 11 and the second light-emitting unit 21 is not limited to multiple 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. The light source device 100 does not necessarily have to include the first lens array 12, the first relay lens 13, the first condenser lens 17, the first light diffusing member 18, the second lens array 22, the second relay lens 23, the second condenser lens 27, and the second light diffusing member 28.

<Configuration Example of the First Wavelength Converting Member 16 and the Second Wavelength Converting Member 26 and Their Surroundings>
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.

As shown in FIG. 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 the central axis 16c of the first wavelength conversion member 16. The first wavelength conversion region 161 and the first reflection region 162 are arranged so that they each form part of a ring-shaped region on the first wavelength conversion member 16 in a plan view.

The first wavelength conversion region 161 is a phosphor region that emits 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, thereby emitting the first wavelength of the first laser light L11 received from the first optical member 15 without converting it.

The first optical member 15 is configured to be able to irradiate the first irradiation spot 150 of the first laser light L11 onto the first wavelength conversion region 161 and the first reflection region 162 in the first wavelength conversion member 16.

The first wavelength conversion member 16 can rotate around the central axis 16c to alternate 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.

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 lies along the direction of gravity.

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 may be driven not only in a rotational manner but also in a translational manner in a direction intersecting 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 a substantially circular shape, and may also be a substantially elliptical shape, a substantially polygonal shape, etc.

As shown in FIG. 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 planar 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 arranged so as to form part of a ring-shaped region on the second wavelength conversion member 26 in a planar view.

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 first wavelength of the second laser light L21 received from the second optical member 25 without converting it.

The second optical member 25 is configured to be able to irradiate the second irradiation spot 250 of the second laser light L21 onto 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 rotate around its central axis 26c to alternate between the second wavelength conversion region 261 and the second reflection region 262, thereby emitting the second laser light L21 and the second fluorescent light L22 in a time-division manner.

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 perpendicularity to the central axis 25c of the second optical member 25 may be approximately perpendicular. In this embodiment, the second passing line 260 is approximately perpendicular to the Y axis that lies along the direction of gravity.

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.

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 rotational drive but also by translational drive in a direction intersecting the central axis 26c, in accordance with the first wavelength conversion member 16, or may not be driven at all. The planar shape of the second wavelength conversion member 26 is not limited to being approximately circular, and may be approximately elliptical, approximately polygonal, or the like, in accordance with the first wavelength conversion member 16.

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

Conventionally, light source devices have been disclosed that have multiple light-emitting units and multiple wavelength conversion members, guide light from the multiple light-emitting units to the multiple wavelength conversion members, and use a light combining member to combine and emit light emitted from each of the multiple wavelength conversion members according to the guided light. However, these conventional configurations have multiple optical systems that guide light from the light-emitting units to the wavelength conversion members and guide light emitted from the wavelength conversion members to the light combining member, which increases the distance between the multiple optical systems or the distance between the multiple wavelength conversion members, making the light source device prone to becoming larger.

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

In the light source device 100 according to this embodiment, 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. 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.

The light source device 100 also includes 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 the first passing line 160, and the second holding member 20 has a shape that is line-symmetrical about the second passing line 260.

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 placing the first holding member 10 in 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 multiple light-emitting units including the first light-emitting unit 11, the second light-emitting unit 21, etc.

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 multiple 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, improved manufacturing efficiency also allows for reduced costs for the light source device 100.

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. As a result, heat generation in the wavelength conversion region is suppressed compared to when one wavelength conversion region is excited by both the first light-emitting unit 11 and the second light-emitting unit 21, and a decrease in wavelength conversion efficiency due to the wavelength conversion member can be suppressed. As a result, a light source device 100 capable of emitting high-brightness light source light L can be provided.

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.

<Modification>
Modified examples of the light source device 100 will be described with reference to Figs. 4 and 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.

As shown in FIG. 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.

By including the first cooling member 50, the first holding member 10 can suppress heat generation from the first wavelength conversion member 16 inside the first holding member 10, ensuring high wavelength conversion efficiency by the first wavelength conversion member 16.

As shown in FIG. 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.

By including the second cooling member 60, the second holding member 20 can suppress heat generation from the second wavelength conversion member 26 inside the second holding member 20, ensuring high wavelength conversion efficiency by the second wavelength conversion member 26.

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

Figure 6 is a diagram illustrating the internal configuration of the display device 200. The display device 200 is, for example, a projector that displays an image by projecting it onto a screen S. The display device 200 has 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.

The housing 210 houses 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 containing wavelengths corresponding to the colors R (red), G (green), and B (blue), for example.

The light homogenizing element 70 homogenizes the light emitted from the light source device 100 by mixing it. The light homogenizing element 70 can be, for example, a light tunnel made up of a combination of four mirrors, a rod integrator, or a fly's eye lens.

The illumination optical system 80 illuminates the spatial light modulator 81 approximately uniformly with light homogenized by the light homogenizing element 70. The illumination optical system 80 includes, for example, one or more lenses and one or more reflective surfaces.

The spatial light modulator 81 has multiple pixels and generates an image by turning on or off the image light L emitted from the light source device 100 and passing through the light uniformizing element 70 and illumination optical system 80 for each pixel. 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.

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.

By including the light source device 100, the display device 200 can prevent itself from becoming larger. 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.

The above describes exemplary embodiments of the present invention, but the present invention is not limited to these specific embodiments, and various modifications and variations are possible within the scope of the gist of the present invention as set forth in the claims.

The light source device 100 can be used as a device for emitting light source light in a variety of optical devices, not just display devices.

10 First holding member 11 First light-emitting unit 12 First lens array 13 First relay lens 14 First dichroic mirror 15 First optical member 15c Central axis 150 of first optical member First irradiation spot 16 First wavelength conversion member 16c Central axis 160 of first wavelength conversion member First passing line 160c Center 161 of first wavelength conversion member First wavelength conversion region 162 First reflecting region 163 First rotating substrate 17 First condensing lens 18 First light diffusing member 19 First lens holder 20 Second holding member 21 Second light-emitting unit 22 Second lens array 23 Second relay lens 24 Second dichroic mirror 25 Second optical member 25c Central axis 250 of second optical member Second irradiation spot 26 Second wavelength conversion member 260 Second passing line 260c Center 261 of second wavelength conversion member Second wavelength conversion region 262 Second reflecting region 263 Second rotating substrate 26c Central axis 27 of second wavelength conversion member Second condenser lens 28 Second light diffusing member 29 Second lens holder 30 Light combining member 301 First reflecting surface 302 Second reflecting surface 40 Support member 50 First cooling member 60 Second cooling member 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 Housing L11 First laser light L12 First fluorescence L21 Second laser light L22 Second fluorescence L Light source light

Patent No. 6283932 Patent No. 6783545

Claims (7)

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; 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. 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. 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. 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. 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. 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.