JP2023123325A - Light source device and display apparatus - Google Patents

Abstract

To reduce the size of a light source device.SOLUTION: A light source device according to one aspect of the present invention comprises: a light emitting portion including a light emitting surface; an optical system that condenses light of a first wavelength from the light emitting portion; and a wavelength conversion member that includes a wavelength conversion area for receiving the light of the first wavelength condensed by the optical system and emitting light of a second wavelength different from the first wavelength. The wavelength conversion member is provided so that its central axis is along the light emitting surface. When the wavelength conversion member and the light emitting portion are viewed from a direction along the central axis of the wavelength conversion member, the optical system condenses the light of the first wavelength at a position closer to the light emitting portion than an end on a side opposite to the light emitting portion side in the wavelength conversion member.SELECTED DRAWING: Figure 3

Description

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

2. Description of the Related Art Conventionally, light source devices used in display devices and the like are known. Examples of the display device include a projector that displays an image on a screen.

As the light source device, an optical system for condensing the light of the first wavelength from the light emitting part, and a wavelength converter for receiving the light condensed by the optical system and emitting the light of the second wavelength different from the first wavelength. A configuration having a member is disclosed (see Patent Literatures 1 and 2, for example).

However, in the configuration of Patent Document 1, when viewed from the direction along the central axis of the wavelength conversion member, the lens is arranged outside the end of the wavelength conversion member opposite to the light emitting section side. The size of the light source device is correspondingly increased. In addition, in the configuration of Patent Document 2, when viewed from the direction along the central axis of the wavelength conversion member, the end portion of the optical system opposite to the light emitting portion side is the opposite side of the wavelength conversion member to the light emitting portion side. , the light source device becomes larger by that amount.

An object of the present invention is to reduce the size of a light source device.

A light source device according to an aspect of the present invention includes a light emitting unit including a light emitting surface, an optical system for condensing light of a first wavelength from the light emitting unit, and light of the first wavelength condensed by the optical system. a wavelength conversion member including a wavelength conversion region that receives light and emits light of a second wavelength different from the first wavelength, wherein the wavelength conversion member has a central axis along the light emitting surface. and when the wavelength conversion member and the light emitting section are viewed from a direction along the central axis of the wavelength conversion member, the optical system is positioned opposite to the light emitting section side of the wavelength conversion member. The light of the first wavelength is condensed at a position closer to the light emitting part than the end on the side.

According to the present invention, the size of the light source device can be reduced.

It is a figure which illustrates the internal structure of the light source device which concerns on 1st Embodiment. FIG. 2 is a view of the light source device in FIG. 1 as viewed from the arrow A; 1. It is the 1st example of the B arrow directional view of the light source device of FIG. It is the 2nd example of the B arrow directional view of the light source device of FIG. It is the 3rd example of the B arrow directional view of the light source device of FIG. It is a figure which illustrates the internal structure of the display apparatus which concerns on 2nd Embodiment. It is a figure which illustrates the internal structure of the light source device which concerns on 3rd Embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the invention will be described in detail with reference to the drawings. In each drawing, the same constituent parts are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate.

The embodiments shown below are examples of a light source device and a display device for embodying the technical idea of the present disclosure, and the present disclosure is not limited to the embodiments shown below. Unless otherwise specified, the dimensions, materials, shapes, relative positions, etc. of the components described below are intended to be illustrative rather than limiting the scope of the present disclosure. It is. Also, the sizes and positional relationships of members shown in the drawings may be exaggerated for clarity of explanation.

[First embodiment]
<Configuration Example of Light Source Device 100>
An example of the configuration of a light source device 100 according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a diagram illustrating the internal configuration of a light source device 100. As shown in FIG. FIG. 2 is an A view of the light source device 100 of FIG. The light source device 100 is a device that emits light source light L. As shown in FIG. The light source light L is used, for example, in 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 section 11, a first relay lens 12, a first lens array 13, a first dichroic mirror 14, a first optical system 15, a first wavelength It has a converting member 16 and a first light diffusing member 17 . Further, the light source device 100 includes a second light emitting section 21, a second relay lens 22, a second lens array 23, a second dichroic mirror 24, a second optical system 25, a second wavelength conversion member 26, and a second light diffusion member 27 . Furthermore, the light source device 100 has a light combining member 30 and a light homogenizing element 40 .

The first light-emitting portion 11 including the first light-emitting surface 110 is an example of a light-emitting portion and is mounted on the mounting surface 10 . A vertical plane 20 represents a plane perpendicular to the mounting surface 10 . The mounting surface 10 is a surface on the Z-axis positive direction side of the mounting substrate on which the first light emitting unit 11 is mounted. The first light emitting unit 11 includes a plurality of semiconductor lasers arranged two-dimensionally, and emits a first laser beam L11 from each of the plurality of semiconductor lasers toward the first relay lens 12 . This first laser light L11 has a first wavelength corresponding to blue or ultraviolet light, and can excite the first wavelength conversion region included in the first wavelength conversion member 16 .

The first laser light L11 emitted from the first light emitting unit 11 is substantially collimated by the lenses 121 and 122 included in the first relay lens 12, passes through the first lens array 13, and reaches the first dichroic mirror 14. Incident. The first dichroic mirror 14 is a wavelength-selective mirror that reflects the first laser beam L11 of the first wavelength and transmits light other than the first wavelength.

The first laser beam L<b>11 reflected by the first dichroic mirror 14 reaches the first optical system 15 . The first optical system 15 is an example of an optical system that collects the first laser beam L11 from the first light emitting section 11 .

The first optical system 15 includes a lens 151 , a lens 152 and a lens 153 . The first optical system 15 converges the first laser beam L11 from the first dichroic mirror 14 onto the first wavelength conversion member 16 with the lenses 151 and 152 . 15 s of 1st condensing positions represent the condensing position of the 1st laser beam L11 on the 1st wavelength conversion member 16 by the 1st optical system 15. FIG.

The first wavelength conversion member 16 receives the first laser beam L11 condensed by the first optical system 15, and includes a wavelength conversion region that emits light of a second wavelength different from the first wavelength. is an example. The 1st wavelength conversion member 16 is provided so that 16 A of the center axis|shafts may follow the mounting surface 10. As shown in FIG. The first wavelength converting member 16 includes a first wavelength converting area and a first reflecting area. The first wavelength conversion member 16 emits the first fluorescence L12 by the first wavelength conversion area and emits the first laser light L11 by being reflected by the first reflection area.

The first optical system 15 guides the first laser beam L11 and the first fluorescence L12 from the first wavelength conversion member 16 toward the lens 153 by the lens 152 and the lens 151 . The lens 153 converges the guided first laser beam L11 and first fluorescence L12 onto the first reflecting surface 301 of the light synthesizing member 30 via the first light diffusing member 17 . The first light diffusion member 17 includes a light diffusion surface and diffuses the first laser light L11 and the first fluorescence L12 that pass through itself.

The second light-emitting portion 21 including the second light-emitting surface 210 is an example of a light-emitting portion and is mounted on the mounting surface 10 . The second light emitting unit 21 includes a plurality of semiconductor lasers arranged two-dimensionally, and emits a second laser beam L21 from each of the plurality of semiconductor lasers toward the second relay lens 22 . The second laser light L21 has a first wavelength corresponding to blue, ultraviolet, or the like, and can excite the second wavelength conversion region included in the second wavelength conversion member 26 .

The second laser light L21 emitted from the second light emitting unit 21 is substantially collimated by the lenses 221 and 222 included in the second relay lens 22, passes through the second lens array 23, and reaches the second dichroic mirror 24. Incident. The second dichroic mirror 24 is a wavelength-selective mirror that reflects the second laser beam L21 of the first wavelength and transmits light other than the first wavelength.

The second laser beam L<b>21 reflected by the second dichroic mirror 24 reaches the second optical system 25 . The second optical system 25 is an example of an optical system that collects the second laser light L21 from the second light emitting section 21 .

The second optical system 25 includes a lens 251 , a lens 252 and a lens 253 . The second optical system 25 converges the second laser light L21 from the second dichroic mirror 24 onto the second wavelength conversion member 26 with the lenses 251 and 252 . 25 s of 2nd condensing positions represent the condensing position of the 2nd laser beam L21 on the 2nd wavelength conversion member 26 by the 2nd optical system 25. FIG.

The second wavelength conversion member 26 is an example of a wavelength conversion member including a wavelength conversion region that receives the second laser light L21 from the second light emitting unit 21 and emits light of a second wavelength different from the first wavelength. be. The second wavelength conversion member 26 is provided such that its central axis 26A extends along the mounting surface 10 . The second wavelength converting member 26 includes a second wavelength converting area and a second reflecting area. The second wavelength conversion member 26 emits the second fluorescence L22 by the second wavelength conversion area and emits the second laser light L21 by being reflected by the second reflection area.

The second optical system 25 guides the second laser beam L21 and the second fluorescence L22 from the second wavelength conversion member 26 toward the lens 253 by the lens 252 and the lens 251 . The lens 253 converges the guided second laser beam L21 and second fluorescence L22 onto the second reflecting surface 302 of the light synthesizing member 30 via the second light diffusing member 27 . The second light diffusing member 27 includes a light diffusing surface and diffuses the second laser light L21 and the second fluorescence L22 passing therethrough.

The light combining member 30 reflects the diffused light from the first light diffusing member 17 on the first reflecting surface 301 and reflects the diffused light from the second light diffusing member 27 on the second reflecting surface 302 . Thereby, the light synthesizing member 30 emits to the light homogenizing element 40 the light source light L obtained by synthesizing the first laser beam L11, the first fluorescence L12, the second laser beam L21 and the second fluorescence L22. The light synthesizing member 30 is, for example, a rectangular prism, but is not limited to a rectangular prism, and may synthesize the first laser beam L11, the first fluorescence L12, the second laser beam L21, and the second fluorescence L22.

The light homogenizing element 40 mixes and homogenizes the light from the light combining member 30 . For the light homogenizing element 40, for example, a light tunnel combining four mirrors, a rod integrator, a fly-eye lens, or the like can be used.

The light source device 100 can emit light source light L homogenized by the light homogenizing element 40 .

In this embodiment, the first optical system 15 and the second optical system 25 have the same configuration. The first wavelength conversion member 16 and the second wavelength conversion member 26 have the same configuration.

As shown in FIGS. 1 and 2, a line 70 passing through the first condensing position 15s and the second condensing position 25s extends between the center 16c of the first wavelength conversion member 16 and the center 26c of the second wavelength conversion member 26. along line 80 through . The line 70 and the line 80 being along means that the line 70 and the line 80 are substantially parallel. The "substantially" in substantially parallel means that a deviation that is generally recognized as an error is allowed. In this embodiment, for example, it means a deviation from parallel of ±5 degrees or less. In FIG. 1, since the line 80, the central axis 16A and the central axis 26A overlap each other, the respective symbols are written together.

The light source device 100 may further have a light emitting section other than the first light emitting section 11 and the second light emitting section 21 . Each of the first light emitting unit 11 and the second light emitting unit 21 is not limited to a plurality of semiconductor lasers, and may have one semiconductor laser, or have one or more light emitting units such as light emitting diodes that emit incoherent light. You may The light source device 100 does not necessarily have to include the first relay lens 12, the first lens array 13, the first light diffusion member 17, the second relay lens 22, the second lens array 23, and the second light diffusion member 27. .

<Configuration example around the first wavelength conversion member 16>
Next, an example of the configuration around the first wavelength conversion member 16 will be described. FIG. 3 is a first example of the B arrow view of the light source device 100 of FIG.

As shown in FIG. 3 , the first wavelength converting member 16 includes a first wavelength converting area 161 and a first reflecting area 162 on a first rotating substrate 163 . The first rotary substrate 163 has a substantially circular planar shape when viewed from the normal direction, and can be rotationally driven around the central axis 16A of the first wavelength conversion member 16 . The first wavelength conversion region 161 and the first reflection region 162 are provided so as to form part of a ring-shaped region on the first wavelength conversion member 16 in plan view.

The first wavelength conversion region 161 is a phosphor region that emits the first fluorescence L12 excited by the first laser beam L11. The wavelength of the first fluorescence L12 corresponds to the second wavelength. The first reflective area 162 reflects the first laser beam L11 condensed from the first optical system 15, so that the first wavelength of the first laser beam L11 received from the first optical system 15 is not converted. inject.

The first optical system 15 is provided so as to be able to converge the first laser beam L11 on the first wavelength conversion region 161 and the first reflection region 162 of the first wavelength conversion member 16 . By rotating around the central axis 16A, the first wavelength conversion member 16 alternately replaces the first wavelength conversion region 161 and the first reflection region 162, and time-divides the first laser light L11 and the first fluorescence L12. can be ejected with

Note that the first wavelength conversion member 16 may further include a phosphor region that emits fluorescence of wavelengths other than the first wavelength and the second wavelength. The first wavelength conversion member 16 may be driven in translation in a direction intersecting with the central axis 16A instead of being rotationally driven, or may not be driven. The planar view shape of the first wavelength conversion member 16 is not limited to a substantially circular shape, and may be substantially elliptical, substantially polygonal, or the like.

In the light source device 100 according to the first example, when the first wavelength conversion member 16 and the first light emitting section 11 are viewed from the direction along the central axis of the first wavelength conversion member (as viewed by arrow B in FIG. 1), , the first optical system 15 converges the first laser beam L11 at a position closer to the first light emitting unit 11 than the end of the first wavelength conversion member 16 opposite to the first light emitting unit 11 side.

In FIG. 3, an end portion 155 represents an end portion of the first optical system 15 on the side opposite to the first light emitting section 11 side. The first optical system 15' indicated by the dashed line is arranged so that the first condensing position 15s' is at the end portion 165 of the first wavelength conversion member 16 opposite to the first light emitting portion 11 side. An optical system is shown. A distance d11 represents the distance between the first condensing position 15s and the first light emitting surface 110 . A distance D10 represents the distance between the first condensing position 15s′ and the first light emitting surface 110 . Distance d11 is shorter than distance D10.

FIG. 4 is a second example of the B arrow view of the light source device 100 of FIG. As shown in FIG. 4, in the light source device 100 according to the second example, the first wavelength conversion member 16 and the first light emitting section 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16 ( 1), the end portion 155 of the first optical system 15 is closer to the first light emitting portion 11 than the end portion 165 of the first wavelength conversion member 16 opposite to the first light emitting portion 11 side. Located in A distance D11 represents the distance between the end 155 of the first optical system 15 and the first light emitting surface 110 . Distance D11 is shorter than distance D10.

FIG. 5 is a third example of the B arrow view of the light source device 100 of FIG. As shown in FIG. 5 , the light source device 100 according to the third example has a holding member 150 that holds the first optical system 15 . In the light source device 100 according to the third example, the first wavelength conversion member 16 and the first light emitting section 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16 (B arrow in FIG. 1). In this case, the end portion 156 of the holding member 150 opposite to the first light emitting portion 11 side is located closer to the first light emitting portion 11 side than the end portion 165 of the first wavelength converting member 16 is. A distance D12 represents the distance between the end portion 156 of the holding member 150 and the first light emitting surface 110 . Distance D12 is shorter than distance D10.

<Action and Effect of Light Source Device 100>
As described above, the light source device 100 includes the first light emitting surface 110, the first light emitting section 11 (light emitting section), the first wavelength converting member 16 (wavelength converting member), and the first optical system 15 (optical system). , have The first wavelength conversion member 16 is provided such that its central axis 16A extends along the first light emitting surface 110 . When the first wavelength conversion member 16 and the first light emitting unit 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16 (as viewed by arrow B in FIG. 1), the first optical system 15 The first laser beam L11 is condensed at a position closer to the first light emitting unit 11 than the end 165 of the wavelength conversion member 16 opposite to the first light emitting unit 11 side. With this configuration, compared with the case where the first optical system 15 converges the first laser beam L11 on the end portion 165 of the first wavelength conversion member 16, the end portion 155 of the first optical system 15 is the first light emitting portion. 11 side, the light source device 100 can be miniaturized accordingly.

Further, in the light source device 100, when the first wavelength conversion member 16 and the first light emitting section 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16, the end portion 155 of the first optical system 15 is , may be configured to be located closer to the first light emitting section 11 than the end portion 165 of the first wavelength conversion member 16 . With this configuration, the light source device 100 can be made smaller than when the end portion 155 of the first optical system 15 is located on the opposite side of the first light emitting portion 11 side from the end portion 165 of the first wavelength conversion member 16 . can be

Also, the light source device 100 may have a holding member 150 . In this case, when the first wavelength conversion member 16 and the first light emitting section 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16, the end portion 156 of the holding member 150 has the first wavelength. It may be configured to be positioned closer to the first light emitting section 11 than the end portion 165 of the conversion member 16 . With this configuration, the light source device 100 can be miniaturized compared to the case where the end portion 156 of the holding member 150 is located on the side opposite to the first light emitting portion 11 side with respect to the end portion 165 of the first wavelength conversion member 16. .

Further, the light source device 100 includes a first light emitting section 11, a second light emitting section 21, a first wavelength conversion member 16, a second wavelength conversion member 26, a first optical system 15, and a second optical system 25. , have The first optical system 15 converges the first laser beam L11, and the second optical system 25 converges the second laser beam L21. A line 70 passing through the first condensing position 15 s by the first optical system 15 and the second condensing position 25 s by the second optical system 25 is the center 16 c of the first wavelength conversion member 16 and the second wavelength conversion member 26 . along a line 80 passing through the center 26c of the . With this configuration, the light source device 100 can be made smaller than when the lines 70 and 80 are inclined.

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

The light source device 100 includes a second light emitting section 21, a second relay lens 22, a second lens array 23, a second dichroic mirror 24, a second optical system 25, a second wavelength conversion member 26, The second light diffusion member 27 does not necessarily have to be provided. The effect of miniaturizing the light source device 100 can be obtained even when these parts are not provided.

[Second embodiment]
Next, a display device 200 according to the second embodiment will be described. In the second embodiment, the same components as in the first embodiment are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate. This point also applies to other embodiments described below.

FIG. 6 is a diagram illustrating the internal configuration of the display device 200. As shown in FIG. The display device 200 is, for example, a projector that displays an image by projecting the image on the screen S. FIG. The display device 200 has a housing 220 , a light source device 100 , an illumination optical system 50 , a spatial light modulator 51 and a projection optical system 60 .

The housing 220 houses the light source device 100 , the illumination optical system 50 , the spatial light modulator 51 and the projection optical system 60 .

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

The illumination optical system 50 substantially uniformly illuminates the spatial light modulator 51 with the light source light L emitted from the light source device 100 . The illumination optical system 50 has, for example, one or more lenses, one or more reflecting surfaces, and the like.

The spatial light modulator 51 has a plurality of pixels, and generates an image by turning on or off the light source light L emitted from the light source device 100 and passed through the illumination optical system 50 for each pixel. The spatial light modulator 51 includes, for example, a light valve such as 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 60 enlarges and projects the image generated by the spatial light modulator 51 onto the screen S. FIG. The projection optical system 60 has, for example, one or more lenses.

Since the display device 200 includes the light source device 100, it is possible to suppress an increase in the size of the display device 200 itself.

[Third Embodiment]
FIG. 7 is a diagram illustrating the internal configuration of a light source device 100a according to the third embodiment. The light source device 100a includes a second light emitting section 21a, a second relay lens 22a, a second lens array 23a, a second dichroic mirror 24a, a second optical system 25a, a second wavelength conversion member 26a, and a color wheel. 90 and The second relay lens 22a includes a lens 221a and a lens 222a. The second optical system 25a includes a lens 251a, a lens 252a, and a lens 253a.

The second light emitting unit 21a has the same configuration and function as the second light emitting unit 21 described above, the second relay lens 22a has the same configuration and function as the second relay lens 22 described above, and the second lens array 23a has the same configuration and functions as the second lens array 23a described above. , and the orientation is rotated by 90 degrees. The second dichroic mirror 24a has the same configuration as the above-described second dichroic mirror 24, the second optical system 25a has the same configuration as the above-described second optical system 25, and the second wavelength conversion member 26a has the same configuration as the above-described second wavelength conversion member 26a. and functions, and the orientation in which it is arranged is rotated 90 degrees.

The first light emitting surface 110 of the first light emitting section 11 is arranged substantially parallel to the central axis 16A of the first wavelength converting member 16 . Almost parallel means that a strict parallel state is not required, and a deviation from the parallel state that is generally recognized as an error is allowed. For example, "substantially parallel" means a state in which there is a deviation from the parallel state of ±1 degree or less.

Light from the first light emitting unit 11 passes through the first relay lens 12, the first lens array 13, the first dichroic mirror 14, and the first optical system 15 in this order, and reaches the first condensing position on the first wavelength conversion member 16. Collect at 15 s. The first wavelength conversion member 16 emits a first laser beam L11 that reflects the condensed light and a first fluorescence L12 that is the wavelength-converted condensed light. The first laser beam L11 and the first fluorescence L12 (light from the first wavelength conversion member 16) pass through the first optical system 15 and reach the light combining member 30, are reflected by the light combining member 30, and reach the color wheel 90. do.

The second light emitting surface 210a of the second light emitting portion 21a is arranged substantially parallel to the central axis 26aA of the second wavelength converting member 26a. A straight line including the central axis 26aA of the second wavelength converting member 26a intersects with a straight line including the central axis 16A of the first wavelength converting member 16 . In this embodiment, the straight line including the central axis 26aA is substantially orthogonal to the straight line including the central axis 16A. Nearly orthogonal means that a strict orthogonal state is not required, and a deviation from the orthogonal state that is generally recognized as an error is allowed. For example, "substantially orthogonal" means a state in which there is a deviation from the orthogonal state of ±1 degree or less.

The light from the second light emitting unit 21a passes through the second relay lens 22a, the second lens array 23a, the second dichroic mirror 24a, and the second optical system 25a in this order, and reaches the second condensing position on the second wavelength conversion member 26a. Collect at 25as. The second wavelength conversion member 26a emits a second laser beam L21 reflecting the condensed light and a second fluorescence L22 obtained by wavelength-converting the condensed light. After passing through the second optical system 25a, the second laser beam L21 and the second fluorescence L22 (light from the second wavelength conversion member 26a) reach the color wheel 90 outside the area of the light combining member 30. That is, the light from the second wavelength conversion member 26a reaches the color wheel 90 without passing through the light combining member 30. FIG.

The light from the first wavelength conversion member 16 and the light from the second wavelength conversion member 26a are combined at the combining position 70s. The combined light enters the light homogenizing element 40 .

70 s of synthetic|combination positions are positions where the 1st laser beam L11 and the 2nd laser beam L21 approached most. When the first laser beam L11 and the second laser beam L21 pass through substantially the same position, this substantially same passing position corresponds to the combined position 70s. Alternatively, the synthesis position 70s is the position where the first fluorescence L12 and the second fluorescence L22 are closest. When the first fluorescence L12 and the second fluorescence L22 pass through substantially the same position, this substantially the same passing position corresponds to the combined position 70s.

Strictly speaking, all the illumination lights from the light source device 100a are combined at the incident position to the light homogenizing element 40. FIG. Therefore, the position where the first laser beam L11 and the second laser beam L21 are synthesized or the position where the first fluorescence L12 and the second fluorescence L22 are synthesized is the center of the entrance aperture of the light homogenizing element 40. good too.

Since the synthesized position 70s is uniquely determined, a first plane P1 including three points of the synthesized position 70s, the first condensed position 15s by the first optical system 15, and the second condensed position 25as by the second optical system 25a is can be defined. In FIG. 7, a plane parallel to the XZ plane corresponds to the first plane P1.

In this embodiment, both the center 16c of the first wavelength conversion member and the center 26ac of the second wavelength conversion member 26a are located in one of the spaces bisected by the first plane P1.

In this embodiment, when defining a second plane P2 that includes both the central axis 16A of the first wavelength converting member 16 and the central axis 26aA of the second wavelength converting member 26a, the first plane P1 is substantially parallel to the second plane P2. is. In FIG. 7, a plane parallel to the XZ plane corresponds to the second plane P2.

In the present embodiment, when the first wavelength conversion member 16 and the first light emitting unit 11 are viewed from the direction along the central axis 16A of the first wavelength conversion member 16, the first light emitting unit 11 in the first wavelength conversion member 16 The first laser beam L11 is condensed at a position closer to the first light emitting unit 11 than the end opposite to the side. As a result, the first optical system 15 is miniaturized compared to the case where the end of the first optical system 15 is located on the side opposite to the first light emitting unit 11 side with respect to the end of the first wavelength conversion member 16. Therefore, the entire light source device 100a can be miniaturized.

In addition, in the present embodiment, when viewed from the direction along the central axis 26aA of the second wavelength conversion member 26a, the second light emission section 21a, and the second wavelength conversion member 26a, the second light emission section in the second wavelength conversion member 26a The second laser beam L21 is condensed at a position closer to the second light emitting unit 21 than the end opposite to the 21 side. As a result, the size of the second optical system 25 is reduced compared to the case where the end of the second optical system 25 is located on the side opposite to the second light emitting unit 21 side with respect to the end of the second wavelength conversion member 26. Therefore, the entire light source device 100a can be miniaturized.

Even if the first light emitting surface 110 of the first light emitting section 11 is arranged substantially parallel to the Z axis, the same effect as described above can be obtained. Even if the second light emitting surface 210a of the second light emitting portion 21a is arranged parallel to the X-axis, the same effect as described above can be obtained.

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 can be made within the scope of the invention described in the scope of the claims. Transformation and change are possible.

The light source device 100 is not limited to a display device, and can be used as a device for emitting light source light in various optical devices.

10 Mounting surface 11 First light emitting unit 110 First light emitting surface 12 First relay lens 13 First lens array 14 First dichroic mirror 15 First optical system 15s First condensing position 155 End of first optical system 16 1 wavelength conversion member 16A central axis 16c of first wavelength conversion member center 161 of first wavelength conversion member first wavelength conversion region 162 first reflection region 163 first rotary substrate 165 end portion 17 of first wavelength conversion member first light Diffusion member 20 Vertical surface 21 Second light emitting unit 210 Second light emitting surface 22 Second relay lens 23 Second lens array 24 Second dichroic mirror 25 Second optical system 25s Second condensing position 26 Second wavelength conversion member 26A Second Central axis 26c of wavelength conversion member Center 261 of second wavelength conversion member Second wavelength conversion region 262 Second reflection region 263 Second rotary substrate 27 Second light diffusion member 30 Light combining member 301 First reflection surface 302 Second reflection surface 40 Light homogenizing element 50 Illumination optical system 51 Spatial light modulator 60 Projection optical system 70 Line 80 passing through the first converging position and the second converging position The center of the first wavelength conversion member and the center of the first wavelength conversion member line 90 passing through color wheel 100 light source devices 121, 122, 151, 152, 153, 221, 222, 251, 252, 253 lens 150 holding member 156 end portion 200 of holding member display device 220 housing L11 first laser beam L12 First fluorescence L21 Second laser beam L22 Second fluorescence L Light source beams d11, D10, D11, D12 Distance

Japanese Patent No. 6283932 Japanese Patent No. 6783545

Claims (9)

a light-emitting portion including a light-emitting surface;
an optical system that collects the light of the first wavelength from the light emitting unit;
a wavelength conversion member including a wavelength conversion region that receives light of the first wavelength condensed by the optical system and emits light of a second wavelength different from the first wavelength;
The wavelength conversion member is provided so that its central axis is along the light emitting surface,
When the wavelength converting member and the light emitting section are viewed from the direction along the central axis of the wavelength converting member, the optical system is arranged from the end of the wavelength converting member opposite to the light emitting section side. and condensing the light of the first wavelength at a position on the side of the light emitting section. When the wavelength conversion member and the light emitting section are viewed from the direction along the central axis of the wavelength conversion member, the end portion of the optical system opposite to the light emission section side corresponds to the wavelength conversion member. 2. The light source device according to claim 1, located closer to said light emitting section than an end opposite to said light emitting section. Having a holding member that holds the optical system,
3. The end portion of the holding member opposite to the light emitting portion side is positioned closer to the light emitting portion side than the end portion of the wavelength conversion member opposite to the light emitting portion side. The light source device according to . The optical system includes a first optical system and a second optical system,
The wavelength conversion member includes a first wavelength conversion member and a second wavelength conversion member,
a first light collection position by the first optical system on the first wavelength conversion member, a second light collection position by the second optical system on the second wavelength conversion member, and from the first optical system When defining a first plane including a synthesis position where the light of and the light from the second optical system are synthesized,
Both the center of the first wavelength conversion member and the center of the second wavelength conversion member are located in either one of the spaces bisected by the first plane. Light source device. 5. The method according to claim 4, wherein when defining a second plane including both the central axis of the first wavelength converting member and the central axis of the second wavelength converting member, the first plane is substantially parallel to the second plane. light source device. 5. The light source device according to claim 4, wherein a straight line including the central axis of said first wavelength conversion member and a straight line including the central axis of said second wavelength conversion member intersect. 5. The light source device according to claim 4, wherein a straight line including the central axis of said first wavelength conversion member is substantially parallel to a straight line including the central axis of said second wavelength conversion member. The light emitting unit includes a first light emitting unit and a second light emitting unit,
The wavelength conversion member includes a first wavelength conversion member and a second wavelength conversion member,
The optical system includes a first optical system and a second optical system,
The first optical system condenses the light of the first wavelength from the first light emitting unit,
The second optical system condenses the light of the first wavelength from the second light emitting unit,
A line passing through the first light condensing position by the first optical system and the second light condensing position by the second optical system connects the center of the first wavelength conversion member and the center of the second wavelength conversion member. 3. A light source device according to claim 1 or claim 2, along a line passing through. a spatial light modulator having a plurality of pixels and generating an image by turning on or off light emitted from the light source device according to claim 1 or 2 for each pixel;
and a projection optical system for projecting an image generated by the spatial light modulator.

Images