JP2017211603A - Light source device and projection type video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device capable of combining light fluxes from three or more light source units to achieve high luminance and size reduction.SOLUTION: A light source device 100 comprises: light source units 10B, 10A including a plurality of light sources juxtaposed in an X-direction and emitting light in a Z-direction orthogonal to the X-direction; light source units 10C, 10D including a plurality of light sources juxtaposed in the Z-direction and emitting light in the X-direction; a mirror part 20B transmitting therethrough emission beams from the light sources of the light source unit 10B and reflecting emission beams from the light sources of the light source unit 10C in the Z-direction; a mirror part 20C transmitting therethrough the emission beam from the mirror part 20B and reflecting an emission beam from the light source unit 10D in the Z-direction; and a mirror part 20A reflecting emission beams from the light sources of the light source unit 10A in the X-direction, transmitting therethrough the emission beams from the light sources of the light source unit 10C, and emitting the beams to the mirror part 20B. The mirror parts 20A, 20B, 20C each include a transmission region for transmitting the incident beams and a reflection region for reflecting the incident beams alternately arranged thereon.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a light source device that synthesizes and emits light beams of three or more light source arrays (light source units), and a projection display apparatus using the same.

  Patent Documents 1 and 2 disclose an illumination device (light source device) for a projection video display device (projector). For example, the illuminating device disclosed in Patent Document 1 includes a first light source array (11, 12,...) That is arranged at a predetermined interval in a first direction parallel to a predetermined plane and emits light in the same direction parallel to the predetermined plane. 13) and a second light source array (14, 15, 16) that emits light in the same direction intersecting with the light from the first light source array, arranged at predetermined intervals in a second direction parallel to the predetermined plane. And passing regions (305, 306, 307) for passing light from the first light source array and reflecting regions (302, 303, 304) for reflecting light from the second light source array are alternately arranged. A photosynthesis member (31). The light combining member is configured such that light from the first light source array enters the passage region, light from the second light source array enters the reflection region, and light from the first light source array that has passed through the passage region. It arrange | positions so that the light from the 2nd light source array reflected by the reflection area may go to the same direction.

  As a result, the light is combined so that the light from the second light source array fills the gap between the light from the first light source array, so that the luminous flux size of the combined illumination light can be suppressed. Therefore, the Etendue value of the illumination light when entering the optical system on the rear stage side can be suppressed, so that the amount of illumination light can be increased and the utilization efficiency can be improved.

  Further, the first light source array and the second light source array are arranged corresponding to the passing area and the reflecting area, respectively. At this time, since the passing area is arranged with the reflecting area interposed therebetween, the interval between the light sources in the first light source array is widened. Similarly, the reflecting area is also the passing area in the interval between the light sources in the second light source array. Because it is arranged with a gap, it becomes wider. Therefore, even if each light source in the first and second light source arrays is equipped with a heat exchange unit, each light source can be arranged smoothly.

JP 2010-102049 A JP 2012-18208 A

  The present disclosure provides a light source device and a projection-type image display device that can synthesize light beams from three or more light source units to achieve high brightness and downsizing.

  A light source device according to the present disclosure is juxtaposed in a first direction, first and second light source units including a plurality of light sources that emit light in a second direction orthogonal to the first direction, and juxtaposed in a second direction. The third and fourth light source units including a plurality of light sources that emit light in one direction and the light emitted from the light source of the first light source unit are transmitted, and the light emitted from the light source of the third light source unit is transmitted in the second direction. The first mirror part that reflects, the second mirror part that transmits the light emitted from the first mirror part, and reflects the light emitted from the fourth light source unit in the second direction, and the light emitted from the light source of the second light source unit. A third mirror portion that reflects the emitted light in the first direction, transmits the emitted light from the light source of the third light source unit, and emits the emitted light to the first mirror portion, and the first to third mirror portions include the incident light. The transmission area that transmits light and the reflection area that reflects incident light are alternately It is location.

  Another light source device according to the present disclosure is juxtaposed in the second direction with first and second light source units including a plurality of light sources that are juxtaposed in the first direction and emit light in the second direction orthogonal to the first direction. The third and fourth light source units including a plurality of light sources that emit light in the first direction and the light emitted from the light source of the first light source unit are transmitted, and the light emitted from the light source of the third light source unit is second. A first mirror part that reflects in a direction, a second mirror part that transmits light emitted from the first mirror part and reflects light emitted from the fourth light source unit in a second direction, and a light source of the second light source unit And a third mirror part that reflects the emitted light from the light source of the fourth light source unit, transmits the emitted light from the light source of the fourth light source unit, and emits it to the second mirror part. The transmission area that transmits the incident light and the reflection area that reflects the incident light intersect. It is located in.

  Still another light source device according to the present disclosure includes a first light source unit including a plurality of light sources that emit light in a first direction, and is disposed to face the first light source unit, and emits light in a direction opposite to the first direction. A second light source unit that includes a plurality of light sources, a third light source unit that includes a plurality of light sources that emit light in a second direction orthogonal to the first direction, and a light emitted from the light source of the third light source unit. The first mirror part that reflects the emitted light from the light source of the second light source unit in the second direction and the emitted light from the light source of the third light source unit are transmitted, and the emitted light from the light source of the first light source unit is transmitted to the first light source unit. The second mirror unit includes a second mirror unit that reflects in two directions, and the first and second mirror units are alternately arranged with transmissive regions that transmit incident light and reflective regions that reflect incident light.

  A projection display device according to the present disclosure includes the above-described light source device, a video generation unit that generates video light by modulating light from the light source device with a video signal, and a projection optical system that projects the video light.

  The light source device and the projection display device according to the present disclosure can achieve high brightness and downsizing by combining light beams of three or more light source units.

1 is a diagram showing a configuration of a projector device according to a first embodiment. The figure which shows the structure of the light source device concerning Embodiment 1. FIG. Diagram showing the configuration of the light source unit The figure which shows the structure of 20 A of photosynthesis boards concerning Embodiment 1. FIG. The figure which shows the structure of the photosynthetic plate 20B concerning Embodiment 1. FIG. The figure which shows the structure of the photosynthetic board 20C concerning Embodiment 1. FIG. It is a figure which shows the structure of the phosphor wheel concerning Embodiment 1, Comprising: (a) The figure which looked at the phosphor wheel from the side, (b) The figure which looked at the phosphor wheel from the incident direction of excitation light The figure for demonstrating the photosynthesis operation | movement by the photosynthesis board 20A The figure which shows the structure of the light source device concerning Embodiment 2. FIG. The figure which shows the structure of 20 A of photosynthesis boards concerning Embodiment 2. FIG. The figure which shows the structure of the photosynthetic board 20B concerning Embodiment 2. FIG. The figure which shows the structure of the photosynthetic plate 20C concerning Embodiment 2. FIG. The figure which shows the structure of the light source device concerning Embodiment 3. FIG. The figure which shows the structure of 20 A of photosynthesis boards concerning Embodiment 3. FIG. The figure which shows the structure of the photosynthetic board 20B concerning Embodiment 3. FIG. The figure which shows the structure of the photosynthetic board 20C concerning Embodiment 3. FIG. The figure which shows the structure of the projector apparatus concerning Embodiment 4. FIG. The figure which shows the structure of the light source device concerning Embodiment 4. FIG. The figure which shows the structure of 20 A of photosynthesis boards concerning Embodiment 4. FIG. The figure which shows the structure of the photosynthetic board 20B concerning Embodiment 4. FIG. The figure which shows the structure of the photosynthetic plate 20C concerning Embodiment 4. FIG. It is a figure which shows the structure of the phosphor wheel concerning Embodiment 4, Comprising: (a) The figure which looked at the phosphor wheel from the side, (b) The figure which looked at the phosphor wheel from the incident direction of excitation light The figure which shows the structure of the light source device concerning other embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The inventor (s) provides the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and is intended to limit the subject matter described in the claims. Not what you want.

(Embodiment 1)
Hereinafter, Embodiment 1 will be described with reference to FIGS. Hereinafter, a projector apparatus will be described as a specific embodiment of the projection display apparatus according to the present disclosure.

[1-1. Constitution]
[1-1-1. Configuration of projector apparatus]
FIG. 1 is a diagram illustrating a configuration of the projector apparatus according to the first embodiment. The projector device 1 includes a light source device 100, a light guide optical system 200, an image generation unit 300, and a projection optical system 400. In FIG. 1, the light path L is indicated by an arrow. Further, FIG. 1 shows an XYZ orthogonal coordinate system, and the same XYZ orthogonal coordinate system is also shown in the drawings subsequent to FIG. 2 as appropriate.

  The projector device 1 uses light generated by the light source device 100 in accordance with a video signal from a control unit (not shown) using a digital micromirror device (hereinafter referred to as “DMD”) in the video generation unit 300. Image light is generated by modulation. The projector device 1 projects the generated image light onto a screen or the like by the projection optical system 400. Hereinafter, the configuration of each part will be described in detail.

  The light source device 100 generates a light beam in which a plurality of blue lights and a plurality of yellow (green + red) lights are arranged two-dimensionally. Details of the light source device 100 will be described later.

  The light guide optical system 200 guides the light beam from the light source device 100 to the image generation unit 300. At that time, the light guide optical system 200 generates white light by mixing a plurality of blue lights and a plurality of yellow (green + red) lights. The light guide optical system 200 includes a rod integrator 210, lenses 221, 222, 231, 232, and 233, and mirrors 241 and 242.

  The lenses 221 and 222 are relay lenses that guide the light flux from the light source device 100 to the rod integrator 210. The mirror 241 is a mirror that changes the optical path between the lens 221 and the lens 222 by about 90 degrees.

  The rod integrator 210 is a solid rod made of a transparent member such as glass. The rod integrator 210 reflects the incident light a plurality of times inside to generate a white light by mixing a plurality of blue light and a plurality of yellow (green + red) light, and the light intensity distribution. Generate uniform light. The rod integrator 210 may be a hollow rod whose inner wall is constituted by a mirror surface.

  The lenses 231, 232, and 233 are relay lenses that form an image of the light emitted from the rod integrator 210 on each DMD in the video generation unit 300. The mirror 242 is a mirror that changes the optical path between the lens 232 and the lens 233 by about 90 degrees.

  The video generation unit 300 modulates the light from the light guide optical system 200 with the video signal from the control unit to generate video light. The video generation unit 300 includes DMDs 310R, 310G, and 310B, a total reflection prism 320, and a color prism 330.

  The total reflection prism 320 includes a prism 321 and a prism 322 made of a translucent member. A thin air layer 325 exists on the adjacent surface between the prism 321 and the prism 322. The air layer 325 totally reflects light incident at an angle greater than the critical angle. The totally reflected light enters the color prism 330.

  The color prism 330 includes a prism 331, a prism 332, and a prism 333 made of a translucent member. A dichroic mirror 335 that transmits the red component light and the green component light and reflects the blue component light is provided on a proximity surface between the prism 331 and the prism 332. In addition, a dichroic mirror 336 that transmits green component light and reflects red component light is provided on the proximity surface between the prism 332 and the prism 333.

  The DMDs 310R, 310G, and 310B have a plurality of movable micromirrors. Each micromirror basically corresponds to one pixel. DMDs 310 </ b> R, 310 </ b> G, and 310 </ b> B switch whether or not to direct the reflected light to the projection optical system 400 by changing the angle of each micromirror based on the video signal from the control unit. More specifically, the blue component light reflected by the dichroic mirror 335 between the prism 331 and the prism 332 enters the DMD 310B, and the DMD 310B receives the blue component light based on the video signal for blue. Modulate. The red component light reflected by the dichroic mirror 336 between the prism 332 and the prism 333 enters the DMD 310R, and the DMD 310R modulates the red component light based on the video signal for red. The green component light is incident on the DMD 310G, and the DMD 310G modulates the green component light based on the green video signal. Of the light reflected by the DMDs 310 </ b> B, 310 </ b> R, and 310 </ b> G, light incident on the projection optical system 400 is synthesized by the color prism 330. The combined light enters the total reflection prism 320. The light incident on the total reflection prism 320 is incident on the air layer 325 at a critical angle or less. Accordingly, this light passes through the air layer 325 and enters the projection optical system 400.

  The projection optical system 400 projects the image light from the image generation unit 300 on, for example, a screen. The projection optical system 400 includes a lens for adjusting focus, zoom, and the like.

[1-1-2. Configuration of light source device]
In recent years, individual light sources such as laser diodes (LDs) and light emitting diodes (LEDs) have been used as light sources for projector devices. The light source device in this type of projector device achieves high brightness by arranging a plurality of individual light sources in a two-dimensional manner.

  An individual light source such as an LD or an LED has a higher calorific value than a lamp or the like, and thus the individual light source needs to be cooled. As a method for cooling the individual light source, there are a method using a heat sink, a method using a Peltier element, a method using a liquid cooling mechanism, etc., but a method using a heat sink, which is an inexpensive cooling method, is preferable. In this method, in order to obtain a desired cooling performance, it is necessary to arrange the individual light sources separately.

  By the way, miniaturization is demanded in the projector apparatus. In order to reduce the size of the projector device, it is conceivable to reduce the size of the light beam by reducing the interval between the individual light sources, and to reduce the size of the subsequent optical system. However, if the interval between the individual light sources is narrowed, the cooling performance by the heat sink decreases, the heat radiation of the individual light sources becomes insufficient, and the individual light sources may be damaged.

  Therefore, the inventors of the present application propose a light source device capable of increasing the brightness and size of the light source device and the projector device without impairing the cooling performance by an inexpensive cooling method using a heat sink.

  The light source device 100 according to the present embodiment includes four light source units including a plurality of light sources such as LDs and LEDs to achieve high luminance. At that time, the light source device 100 inserts each light of the light flux from the remaining light source units into each gap of the light flux from one light source unit, and synthesizes the light flux from these light source units. Thereby, it is possible to reduce the light beam size while increasing the luminance. As a result, the downstream optical system can be reduced, and the light source device 100 and the projector device 1 can be reduced in size.

  Further, in the light source device 100 according to the present embodiment, it is not necessary to reduce the interval between the light sources of the light source units in order to reduce the size, so that the cooling performance by an inexpensive cooling method using a heat sink is not impaired.

  Hereinafter, the configuration of the light source device 100 will be described in detail with reference to FIGS. FIG. 2 is a diagram illustrating a configuration of the light source device according to the first embodiment. In FIG. 2, the optical path is indicated by an arrow. Further, in FIG. 2, a direction that forms an angle of 45 degrees with respect to the X direction (first direction) and the Y direction (third direction) is shown as the W direction (fourth direction). The light source device 100 includes a plurality of light source units 10A, 10B, 10C, and 10D, a plurality of light combining plates (a plurality of mirror portions) 20A, 20B, and 20C, a phosphor wheel 30, lenses 141, 142, 143, and 144, 145, 146, diffusion plates 151, 152, a mirror 161, and a dichroic mirror (photosynthesis plate) 171.

  Each light source unit 10A-10D has the same structure. The light source units 10A and 10B are arranged side by side in the X direction. Each of the light source units 10A and 10B has a plurality of light sources arranged two-dimensionally on the XY plane, and emits light beams BA and BB in the Z direction (second direction).

  The light source units 10C and 10D are arranged side by side in the Z direction. Each of the light source units 10C and 10D has a plurality of light sources arranged two-dimensionally in the YZ plane, and emits light beams BC and BD in the X direction. The light source unit 10A and the light source unit 10C are adjacent to each other in a substantially L shape.

  FIG. 3 is a diagram illustrating the configuration of the light source units 10A to 10D. FIG. 3 is a view of the light source unit 10 </ b> A as viewed in the −Z direction. In addition, since each light source unit 10A-10D has the same structure, the structure of 10 A of light source units is demonstrated as a representative.

  The light source unit 10A has a plurality of light sources 11 arranged in two dimensions at substantially equal intervals. The light source unit 10A includes an upper light source block 12u, an intermediate light source block 12m, a lower light source block 121, and a heat sink 13. In each light source block 12u, 12m, 12l, two rows in the Y direction and four light sources 11 in the X direction are arranged. That is, a total of eight light sources 11 are arranged in each light source block 12u, 12m, 12l. The light source 11 includes, for example, a solid light source such as an LD or an LED. In this embodiment, an LD that emits blue light is used as a solid light source. The light emitted from the LD is, for example, blue light having a wavelength of 440 to 470 nm. The light source 11 includes a collimating lens that collimates the light emitted from the LD, and the light source 11 emits substantially parallel light.

  The heat sink 13 is bonded to the back surfaces of the light source blocks 12u, 12m, and 12l via thermally conductive grease or the like. The heat sink 13 is a member for radiating heat generated by the light source 11 in the light source blocks 12u, 12m, and 12l.

  Referring to FIG. 2 again, the light combining plate 20A is disposed so as to form an angle of 45 degrees with respect to the light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C. The light combining plate 20A reflects a part of the light beam BA (solid arrow) from the light source unit 10A and transmits a part of the light beam BC (solid arrow) from the light source unit 10C. Thereby, these light beams are combined and emitted in the X direction as a combined light beam (blue component excitation light) B1. The light combining plate 20A transmits the remaining light beam (broken arrow) of the light beam BA from the light source unit 10A and reflects the remaining light beam (broken arrow) of the light beam BC from the light source unit 10C. As a result, these light beams are separated from the combined light beam B1 and combined to be emitted in the Z direction as a combined light beam (blue component of video light) B4.

  The light combining plate 20B is disposed so as to form an angle of 45 degrees with respect to the light beam BB from the light source unit 10B and the combined light beam B1 from the light combining plate 20A. The light combining plate 20B transmits the light beam BB from the light source unit 10B and reflects the combined light beam B1 from the light combining plate 20A. Thereby, these light beams are combined and emitted in the Z direction as a combined light beam B2.

  The light combining plate 20C is arranged to form an angle of 45 degrees with respect to the combined light beam B2 from the light combining plate 20B and the light beam BD from the light source unit 10D. The light combining plate 20C transmits the combined light beam B2 from the light combining plate 20B and reflects the light beam BD from the light source unit 10D. Thereby, these light beams are combined and emitted as a combined light beam B3 in the Z direction. Hereinafter, the photosynthetic plates 20A to 20C will be described in more detail with reference to FIGS.

  FIG. 4 is a diagram showing the configuration of the photosynthetic plate 20A. FIG. 4 is a view of the light combining plate 20A viewed from the light source unit 10A side. The photosynthetic plate 20A includes a substrate 21 having optical transparency such as glass. The photosynthetic plate 20A includes an upper region 20Au, an intermediate region 20Am, and a lower region 20Al that are divided into three in the Y direction.

  In the upper region 20Au and the lower region 20Al, transmissive regions 23 that transmit light and reflective regions 22 that reflect light are alternately arranged in the -Y direction. The transmission region 23 in the regions 20Au and 20Al transmits the light beam BC (black circle) from the upper light source block 12u and the lower light source block 12l of the light source unit 10C. The reflection region 22 in the regions 20Au and 20Al reflects the light beam BA (white circle) from the upper light source block 12u and the lower light source block 12l of the light source unit 10A.

  On the other hand, in the intermediate region 20Am, reflection regions 22 that reflect light and transmission regions 23 that transmit light are alternately arranged in the -Y direction. The reflection region 22 in the intermediate region 20Am reflects the light beam BC (black circle) from the intermediate light source block 12m of the light source unit 10C. The transmission region 23 in the intermediate region 20Am transmits the light beam BA (white circle) from the intermediate light source block 12m of the light source unit 10A. Thus, the correspondence relationship between the light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C in the intermediate region 20Am, and the reflection region 22 and the transmission region 23 is opposite to that in the upper region 20Au and the lower region 20Al. ing.

  Thereby, the light combining plate 20A is configured so that the light (black circle) from the light source unit 10C is inserted between the light (white circle) from the light source unit 10A in the Y direction in the upper region 20Au and the lower region 20Al, respectively. The light beam BA from the unit 10A and the light beam BC from the light source unit 10C are combined and emitted as a combined light beam (blue component excitation light) B1. On the other hand, the light combining plate 20A has a light flux from the light source unit 10A so that light (black circle) from the light source unit 10C is inserted between light from the light source unit 10A (white circle) in the Y direction in the intermediate region 20Am. The BA and the light beam BC from the light source unit 10C are separated from the combined light beam B1 and combined to be emitted as a combined light beam (blue component of video light) B4.

  A reflection film is formed on the surface of the substrate 21 on the light source unit 10A side in the reflection region 22 of the upper region 20Au and the lower region 20Al. A reflection film is formed on the surface of the substrate 21 on the light source unit 10C side in the reflection region 22 of the intermediate region 20Am. The reflection film in the reflection region 22 of the intermediate region 20Am may be formed on the surface of the substrate 21 on the light source unit 10A side, and the reflection film in the reflection region 22 of the upper region 20Au and the lower region 20Al is the substrate 21. It may be formed on the surface of the light source unit 10C side. On the other hand, an antireflection film is formed on at least one main surface of the substrate 21 in the transmission region 23.

  Moreover, the shape of the reflective region 22 and the transmissive region 23 may be a strip shape continuous over a plurality of incident lights in the W direction, or may be a shape separated for each incident light.

  FIG. 5 is a diagram showing a configuration of the photosynthetic plate 20B. FIG. 5 shows a view of the light combining plate 20B viewed from the light source unit 10B side. The photosynthetic plate 20B includes a substrate 21 having optical transparency such as glass. In the photosynthetic plate 20B, reflection regions 22 that reflect light and transmission regions 23 that transmit light are alternately arranged in the W direction. The reflection region 22 reflects the combined light beam B1 (white circle and black circle) from the light combining plate 20A. The transmission region 23 transmits the light beam BB (vertical stripe circle) from the light source unit 10B.

  Thereby, the light combining plate 20B is inserted so that the light (vertical stripe circle) from the light source unit 10B is inserted between the light from the light source unit 10A (white circle) in the combined light beam B1 from the light combining plate 20A in the W direction. The combined light beam B1 from the light combining plate 20A and the light beam BB from the light source unit 10B are combined and emitted as a combined light beam (blue component excitation light) B2.

  A reflective film is formed on the surface of the substrate 21 on the light combining plate 20 </ b> A side in the reflective region 22. The reflective film in the reflective region 22 may be formed on the surface of the substrate 21 on the light source unit 10B side. On the other hand, an antireflection film is formed on at least one main surface of the substrate 21 in the transmission region 23.

  Moreover, the shape of the reflective region 22 and the transmissive region 23 may be a strip shape continuous over a plurality of incident light in the Y direction, or may be a shape separated for each incident light.

  FIG. 6 is a diagram showing the configuration of the photosynthetic plate 20C. FIG. 6 shows a surface of the light combining plate 20C on the side of the light combining plate 20B. The photosynthetic plate 20C includes a substrate 21 having light transmissivity, such as glass. On the light combining plate 20C, reflection regions 22 for reflecting light and transmission regions 23 for transmitting light are alternately arranged in the W direction and alternately in the Y direction. The transmission region 23 transmits the combined light beam B2 (white circle, black circle, and vertical stripe circle) from the light combining plate 20B. The reflection region 22 reflects the light beam BD (horizontal stripe circle) from the light source unit 10D.

  As a result, the light combining plate 20C is inserted so that the light (horizontal stripe circle) from the light source unit 10D is inserted between the light from the light source unit 10C (black circle) in the combined light beam B2 from the light combining plate 20B in the W direction. In addition, the light combining plate 20B is arranged such that light (horizontal stripe circle) from the light source unit 10D is inserted between light (vertical stripe circle) from the light source unit 10B in the combined light beam B2 from the light combining plate 20B in the Y direction. The combined light beam B2 from the light source and the light beam BD from the light source unit 10D are combined and emitted as a combined light beam (blue component excitation light) B3.

  A reflective film is formed on the surface of the substrate 21 in the reflective region 22 on the light source unit 10D side. The reflective film may be formed on the surface of the substrate 21 on the photosynthesis plate 20B side. On the other hand, an antireflection film is formed on at least one main surface of the substrate 21 in the transmission region 23.

  Further, the shape of the transmission region 23 may be a band shape continuous over a plurality of incident lights in the Y direction, and may be a band shape continuous over a plurality of incident lights in the W direction, or separated for each incident light. It may be a shape.

  The positions of the light source units 10A to 10D are adjusted so that the light beams are incident on the regions described above in the light combining plates 20A to 20C. In the present embodiment, as shown in FIG. 4, the light source unit 10 </ b> C has light incident positions (black circles) from the light sources 11 of the light source unit 10 </ b> C on the light combining plate 20 </ b> A. With respect to the light incident position (white circle), the light source unit 10A is disposed so as to be shifted in the Y direction by ½ of the light incident position interval. As shown in FIG. 5, in the light source unit 10B, in the light combining plate 20B, the incident position of light from each light source 11 of the light source unit 20B (vertical stripe circle) is the incident position of light from each light source 11 of the light source unit 10A ( With respect to the white circle), the light source unit 10A is arranged so as to be shifted in the W direction by a half of the interval between the incident positions of the light. As shown in FIG. 6, in the light combining unit 20C, the light source unit 10D has an incident position (horizontal stripe circle) of light from each light source 11 of the light source unit 10D as an incident position of light from each light source 11 of the light source unit 10C ( The light source unit 10C is shifted in the W direction by 1/2 of the interval between the light incident positions of the light source unit 10C, and the light sources from the light sources 11 of the light source unit 10B (vertical stripe circles). The unit 10B is arranged so as to be shifted in the Y direction by a half of the interval between the incident positions of the light of the unit 10B.

  Referring to FIG. 2 again, the lens 141 is a condenser lens that collects the light beam B3 from the light combining plate 20C. The lens 142 is a concave lens that collimates the light beam from the lens 141. The diffusion plate 151 is a diffusion plate that diffuses the light beam from the lens 142. The diffusing plate 151 and the diffusing plate 152 to be described later are made of, for example, a glass substrate having fine irregularities formed on the surface. The unevenness may be formed on one side of the diffusion plates 151 and 152, or may be formed on both sides.

  The lens 143 and the lens 144 are condenser lenses that collect excitation light on the phosphor of the phosphor wheel 30. In addition, the lens 143 and the lens 144 convert the emitted light from the phosphor into parallel light.

  The phosphor wheel 30 is an example of a reflective phosphor wheel that emits yellow (red + green) fluorescence Y1 in the direction opposite to the light incident direction using the incident blue light B3 as excitation light. FIG. 7A is a view of the phosphor wheel 30 seen from the side, and FIG. 7B is a view of the phosphor wheel 30 seen from the incident direction of the excitation light. The phosphor wheel 30 includes a substrate 31, a motor 32, and a phosphor 33.

  The substrate 31 has a disk shape centered on a rotation axis 30X parallel to the incident direction of the excitation light. The motor 32 is provided at the center of the substrate 31 and rotates the substrate 31 about the rotation shaft 30X.

  The phosphor 33 is formed on the incident surface side of the substrate 21 in a ring shape. The phosphor 33 is formed on the reflective film formed on the substrate 21. The phosphor 33 efficiently absorbs blue excitation light and efficiently emits yellow (red + green) fluorescence. The phosphor 33 is preferably a phosphor having high resistance to temperature quenching. As the phosphor 33, a cerium-activated garnet structure phosphor (Y3Al5O12: Ce3 +), a static inorganic phosphor ceramic, or the like is used. A phosphor may be used instead of the phosphor 33.

  The lens 145 is a condenser lens that condenses the light emitted from the second light source unit 10B. The diffusion plate 152 is a diffusion plate that is disposed in the vicinity of the condensing point of the lens 145 and diffuses the light from the lens 145. The lens 146 is a condenser lens that collimates the light from the diffusion plate 152. The mirror 161 is a mirror that changes the optical path of the light from the lens 146 by about 90 degrees.

  The dichroic mirror 171 is disposed so as to form an angle of approximately 45 degrees with respect to the light from the diffusion plate 151, the light from the lens 143, and the light from the mirror 161. The dichroic mirror 171 is a dichroic mirror having a characteristic of transmitting blue light and reflecting yellow light. Specifically, the dichroic mirror 171 transmits the blue light beam (excitation light) B 3 from the diffusion plate 151 and guides it to the phosphor wheel 30. Further, the dichroic mirror 171 transmits the blue light beam (video light) B4 from the mirror 161 and reflects the yellow (red + green) light beam Y1 from the lens 143, and these light beams B4 and Y1. Generates combined light arranged two-dimensionally.

  Each of the emission points of the light emitted from the phosphor wheel 30 and the incident surface of the rod integrator 210 has a substantially conjugate relationship, and the diffusion plate 152 and the incident surface of the rod integrator 210 have a substantially conjugate relationship. The lens shape has been adjusted.

  Accordingly, the light source device 100 is separated by the light combining plate 20A from the yellow (red + green) light beam Y1 emitted from the phosphor wheel 30 using the blue light beam B3 combined by the light combining plates 20A to 20C as excitation light. The blue light beam B4 is combined to emit a two-dimensionally arranged light beam.

[1-2. Operation]
The operation of the light source device of the projector device configured as described above will be described below. FIG. 8 is a diagram for explaining the light combining operation by the light combining plate 20A. Note that the light combining operation performed by the light combining plates 20B and 20C is the same as the light combining operation performed by the light combining plate 20A, and an explanation thereof will be omitted.

  As shown in FIGS. 2, 4 and 8, the blue luminous flux BA (solid arrow in FIG. 8) emitted from the light source 11 of the upper light source block 12u and the lower light source block 12l in the light source unit 10A is reflected on the light combining plate 20A. The light is reflected by the reflection region 22 and travels in the X direction, that is, the light combining plate 20B. On the other hand, the blue light beam BC (solid arrow in FIG. 8) emitted from the light source 11 of the upper light source block 12u and the lower light source block 12l in the light source unit 10C is transmitted through the transmission region 23 of the light combining plate 20A and is X-direction, Head to the photosynthetic plate 20B. In this way, the light beam BC and the light beam BA are combined so that the light in the light beam BC is inserted between two adjacent lights in the light beam BA in the Y direction, and emitted as a combined light beam B1.

  Further, the blue light beam BA (broken arrow in FIG. 8) emitted from the light source 11 of the intermediate light source block 12m in the light source unit 10A passes through the transmission region 23 of the light combining plate 20A and travels in the Z direction, that is, the lens 145. On the other hand, a blue light beam BC (broken arrow in FIG. 8) emitted from the light source 11 of the intermediate light source block 12m in the light source unit 10C is reflected by the reflection region 22 of the light combining plate 20A and travels in the Z direction, that is, toward the lens 145. In this way, the light beam BC and the light beam BA are combined so that the light in the light beam BC is inserted between two adjacent lights in the light beam BA in the Y direction, separated from the combined light beam B1, and combined light beam. It is emitted as B4.

  Further, as shown in FIGS. 2 and 5, the blue light beam BB emitted from the light source 11 of the light source unit 10B passes through the transmission region 23 of the light combining plate 20B, and travels in the Z direction, that is, the light combining plate 20C. On the other hand, the combined light B1 from the light combining plate 20A is reflected by the reflection region 22 of the light combining plate 20B and travels in the Z direction, that is, the light combining plate 20C. In this way, the luminous flux BB and the synthetic luminous flux B1 are synthesized so that the light in the luminous flux BB is inserted between two adjacent lights in the luminous flux BA of the synthetic luminous flux B1 in the W direction. It is emitted as B2.

  Further, as shown in FIGS. 2 and 6, the combined light B2 from the light combining plate 20B passes through the transmission region 23 of the light combining plate 20C and travels toward the Z direction, that is, the lens 141. On the other hand, the blue light beam BD emitted from the light source 11 in the light source unit 10D is reflected by the reflection region 22 of the light combining plate 20C and travels in the Z direction, that is, toward the lens 141. In the light combining plate 20C, the light in the light beam BD is incident between the light beams BC in the combined light beam B2 in the W direction. In the light combining plate 20C, the light in the light beam BD is incident between the light beams BB in the combined light beam B2 in the Y direction. In the light combining plate 20C, the light beams are combined in this way and emitted as a combined light beam B3.

  The combined light beam B3 passes through the lenses 141 and 142, the diffusion plate 151, the dichroic mirror 171, and the lenses 143 and 144 and enters the phosphor wheel 30 as blue excitation light. In the phosphor wheel 30, a yellow (red + green) light beam Y <b> 1 is emitted using the blue combined light beam B <b> 3 as excitation light, and this light beam Y <b> 1 enters the dichroic mirror 171 through the lenses 144 and 143.

  On the other hand, the separated blue light beam B <b> 4 enters the dichroic mirror 171 through the lens 145, the diffusion plate 152, the lens 146, and the mirror 161. In the dichroic mirror 171, the yellow (red + green) light beam Y1 and the blue light beam B4 are two-dimensionally combined and emitted.

  Thus, the brightness | luminance of an emitted light can be raised by synthesize | combining the light beam from four light source units 10A-10D (high brightness-ization).

  Further, in the light combining plate 20C, the light beams from the other light source units 10B to 10D are inserted into the respective gaps in the W direction and the Y direction of the light beam from the light source unit 10A to synthesize the light source units. Compared with the method of combining the light beams of a plurality of light source units arranged in the direction and the Y direction, it is possible to suppress an increase in the light beam size of the emitted light. As a result, there is no need to increase the subsequent optical elements (lenses 141 to 146, diffusers 151 to 152, mirror 161, dichroic mirror 171, etc.), and a plurality of light sources are simply arranged in the W direction and the Y direction. The light source device 100 can be downsized as compared with the method of combining the light beams of the units. Furthermore, since it is not necessary to increase the optical elements in the light guide optical system 200, the image generation unit 300, and the projection optical system 400, the projector device 1 can be downsized.

  In addition, since it is not necessary to reduce the space | interval of the light source 11 in light source unit 10A-10D for size reduction, ie, to make small the light beam size of emitted light, the cooling performance by the cheap cooling mechanism using the heat sink 13 is impaired. It will not be.

[1-3. Effect]
As described above, in the present embodiment, the light source device 100 includes the light source unit (first light source unit) 10B, the light source unit (second light source unit) 10A, the light source unit (third light source unit) 10C, and the light source. A unit (fourth light source unit) 10D, a light combining plate (first mirror portion) 20B, a light combining plate (second mirror portion) 20C, and a light combining plate (third mirror portion) 20A are provided. The light source units 10B and 10A include a plurality of light sources 11 that are juxtaposed in the X direction (first direction) and emit light in the Z direction (second direction). The light source units 10C and 10D include a plurality of light sources 11 that are juxtaposed in the Z direction and emit light in the X direction. The light combining plate 20B transmits the light emitted from the light source 11 of the light source unit 10B and reflects the light emitted from the light source 11 of the light source unit 10C in the Z direction. The light combining plate 20C transmits light emitted from the light combining plate 20B and reflects light emitted from the light source unit 10D in the Z direction. The light combining plate 20A reflects light emitted from the light source 11 of the light source unit 10A in the X direction, transmits light emitted from the light source 11 of the light source unit 10C, and outputs the light to the light combining plate 20B. In the light combining plates 20A, 20B, and 20C, transmission regions 23 that transmit incident light and reflection regions 22 that reflect incident light are alternately arranged.

  In the present embodiment, each of the light source units 10A and 10B includes a plurality of light sources 11 arranged in a matrix in the X direction and the Y direction (third direction), and each of the light source units 10C and 10D includes , Including a plurality of light sources 11 arranged in a matrix in the Z direction and the Y direction, and in the photosynthetic plate 20B, the strip-shaped reflection region 22 and the strip-shaped transmission region 23 are in the W direction (fourth direction) perpendicular to the Y direction. In the photosynthetic plate 20C, the reflection regions 22 are arranged with the transmission regions 23 sandwiched in each of the Y direction and the W direction. In the photosynthetic plate 20A, the band-like reflection regions 22 and the band-like transmission regions 23 are arranged. Are alternately arranged in the Y direction, and the light BA from the light source 11 of the light source unit 10A and the light are reflected in the reflection region 22 of the light combining plate 20B. The light BC from the light source 11 of the unit 10C is alternately incident in the Y direction, and the light from the light sources 11 of the light source units 10A to 10D is incident on the light combining plate 20C without overlapping each other. The positions of the light source units 10A to 10D are adjusted.

  Thereby, the light BC from the light source unit 10C is inserted between the light BA from the light source unit 10A in the Y direction by the light combining plate 20A, and the light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C are combined. Synthesized. Further, the light combining plate 20B inserts the light BB from the light source unit 10B in the W direction between the light BA from the light source unit 10A in the combined light beam B1 from the light combining plate 20A, and combines the light from the light combining plate 20A. B1 and the light beam BB from the light source unit 10B are combined. Further, the light combining plate 20C inserts the light BD from the light source unit 10D between the light BC from the light source unit 10C in the combined light beam B2 from the light combining plate 20B in the W direction and the light combining plate in the Y direction. The light beam B2 from 20B is inserted between the light beams BB from the light source unit 10B, and the combined light beam B2 from the light combining plate 20B and the light beam BD from the light source unit 10D are combined.

  In this way, the luminous fluxes BA to BD from the four light source units 10A to 10D can be combined to increase the luminance of the emitted light (higher luminance). Further, since the light beams from the light source units 10B to 10D are inserted into the gaps in the W direction and the Y direction of the light beam from the light source unit 10A and combined, the increase in the light beam size of the emitted light is suppressed. Can do. As a result, it is not necessary to enlarge the optical element at the subsequent stage, and the light source device 100 and the projector device 1 are smaller than the method of simply arranging a plurality of light source units in the W direction and the Y direction and combining the light beams of the plurality of light source units. Can be realized.

  In addition, since it is not necessary to reduce the space | interval of the light source 11 in light source unit 10A-10D for size reduction, ie, to make small the light beam size of emitted light, the cooling performance by the cheap cooling mechanism using the heat sink 13 is impaired. It will not be.

(Embodiment 2)
In the second embodiment, the position of the light combining plate 20A in the light source device 100 is different from that in the first embodiment. In the second embodiment, the shapes of the reflection region 22 and the transmission region 23 in the light combining plates 20A, 20B, and 20C are different from those in the first embodiment.

  Hereinafter, the configuration of the light source device according to the second embodiment will be described with reference to FIGS. FIG. 9 is a diagram illustrating a configuration of the light source device according to the second embodiment. In the light source device 100 of the second embodiment, the light combining plate 20A is arranged to receive the light beam BA from the light source unit 10A and the light beam BD from the light source unit 10D. The light combining plate 20A is arranged so as to form an angle of 45 degrees with respect to the light beam BA from the light source unit 10A and the light beam BD from the light source unit 10D. The light combining plate 20A reflects a part of the light beam BA (solid arrow) from the light source unit 10A and transmits a part of the light beam BD (solid arrow) from the light source unit 10D. Thus, these light beams are combined and emitted in the X direction as a combined light beam (blue component excitation light) B1. The light combining plate 20A transmits the remaining light beam (broken arrow) of the light beam BA from the light source unit 10A and reflects the remaining light beam (broken arrow) of the light beam BD from the light source unit 10D. As a result, these light beams are separated from the combined light beam B1 and combined to be emitted in the Z direction as a combined light beam (blue component of video light) B4.

  The light combining plate 20B is arranged so as to form an angle of 45 degrees with respect to the light beam BB from the light source unit 10B and the light beam BC from the light source unit 10C. The light combining plate 20B transmits the light beam BB from the light source unit 10B and reflects the light beam BC from the light source unit 10C. Thereby, these light beams are combined and emitted in the Z direction as a combined light beam B2.

  The light combining plate 20C is disposed at an angle of 45 degrees with respect to the combined light beam B1 from the light combining plate 20A and the combined light beam B2 from the light combining plate 20B. The light combining plate 20C reflects the combined light beam B1 from the light combining plate 20A and transmits the combined light beam B2 from the light combining plate 20B. Thereby, these light beams are combined and emitted as a combined light beam B3 in the Z direction. Hereinafter, the photosynthetic plates 20A to 20C will be described in more detail with reference to FIGS.

  FIG. 10 is a diagram illustrating the configuration of the photosynthetic plate 20A. FIG. 10 is a view of the light combining plate 20A viewed from the light source unit 10A side. In the upper region 20Au and the lower region 20Al of the photosynthetic plate 20A, reflection regions 22 that reflect light and transmission regions 23 that transmit light are alternately arranged in the W direction. The reflection region 22 in the regions 20Au and 20Al reflects the light beam BA (white circle) from the upper light source block 12u and the lower light source block 12l of the light source unit 10A. The transmissive region 23 in the regions 20Au and 20Al transmits the light beam BD (horizontal stripe circle) from the upper light source block 12u and the lower light source block 12l of the light source unit 10D.

  On the other hand, in the intermediate region 20Am of the photosynthetic plate 20A, transmission regions 23 that transmit light and reflection regions 22 that reflect light are alternately arranged in the W direction. The transmission region 23 in the intermediate region 20Am transmits the light beam BA (white circle) from the intermediate light source block 12m of the light source unit 10A. The reflection region 22 in the intermediate region 20Am reflects the light beam BD (black circle) from the intermediate light source block 12m of the light source unit 10D. Thus, the correspondence relationship between the light beam BA from the light source unit 10A and the light beam BD from the light source unit 10D in the intermediate region 20Am, and the transmission region 23 and the reflection region 22 is opposite to that in the upper region 20Au and the lower region 20Al. ing.

  Thus, the light combining plate 20A is inserted so that light from the light source unit 10D (horizontal stripe circle) is inserted between light from the light source unit 10A (white circle) in the W direction in the upper region 20Au and the lower region 20Al, respectively. The light beam BA from the light source unit 10A and the light beam BD from the light source unit 10D are combined and emitted as a combined light beam (blue component excitation light) B1. On the other hand, the light combining plate 20A has the light from the light source unit 10A so that the light from the light source unit 10D (horizontal stripe circle) is inserted between the light from the light source unit 10A (white circle) in the W direction in the intermediate region 20Am. The light beam BA and the light beam BD from the light source unit 10D are separated from the combined light beam B1 and combined to be emitted as a combined light beam (blue component of video light) B4.

  FIG. 11 is a diagram illustrating the configuration of the photosynthetic plate 20B. FIG. 11 shows a view of the light combining plate 20B viewed from the light source unit 10B side. In the photosynthetic plate 20B, reflection regions 22 that reflect light and transmission regions 23 that transmit light are alternately arranged in the W direction. The reflection region 22 reflects the light beam BC (black circle) from the light source unit 10C. The transmission region 23 transmits the light beam BB (vertical stripe circle) from the light source unit 10B.

  As a result, the light combining plate 20B allows the light beam BB from the light source unit 10B and the light source unit so that the light (vertical stripe circle) from the light source unit 10B is inserted between the light from the light source unit 10C (black circle) in the W direction. The light beam BC from 10C is combined and emitted as a combined light beam (blue component excitation light) B2.

  FIG. 12 is a diagram showing the configuration of the photosynthetic plate 20C. FIG. 12 shows a surface of the photosynthesis plate 20C on the photosynthesis plate 20B side. On the light combining plate 20C, reflection regions 22 that reflect light and transmission regions 23 that transmit light are alternately arranged in the Y direction. The reflection region 22 reflects the combined light beam B1 (white circles and horizontal stripe circles) from the light combining plate 20A. The transmission region 23 transmits the combined light beam B2 (black circles and vertical stripe circles) from the light combining plate 20B.

  As a result, the light combining plate 20C has the light from the light combining plate 20A so that the light from the light combining plate 20A (white circles and horizontal stripes) is inserted between the light from the light combining plate 20B (black circles and vertical stripes) in the Y direction. The combined light beam B1 and the combined light beam B2 from the light combining plate 20B are combined and emitted as a combined light beam (blue component excitation light) B3.

  As described above, in the second embodiment, the light source device 100 includes the light source unit (first light source unit) 10B, the light source unit (second light source unit) 10A, and the light source unit (third light source unit) 10C. A light source unit (fourth light source unit) 10D, a light combining plate (first mirror portion) 20B, a light combining plate (second mirror portion) 20C, and a light combining plate (third mirror portion) 20A are provided. The light source units 10B and 10A include a plurality of light sources 11 that are juxtaposed in the X direction (first direction) and emit light in the Z direction (second direction). The light source units 10C and 10D include a plurality of light sources 11 that are juxtaposed in the Z direction and emit light in the X direction. The light combining plate 20B transmits the light emitted from the light source 11 of the light source unit 10B and reflects the light emitted from the light source 11 of the light source unit 10C in the Z direction. The light combining plate 20C transmits light emitted from the light combining plate 20B and reflects light emitted from the light source unit 10D in the Z direction. The light combining plate 20A reflects light emitted from the light source 11 of the light source unit 10A in the X direction, transmits light emitted from the light source 11 of the light source unit 10D, and outputs the light to the light combining plate 20C. In the light combining plates 20A, 20B, and 20C, transmission regions 23 that transmit incident light and reflection regions 22 that reflect incident light are alternately arranged.

  In the second embodiment, the light source device 100 includes the light source units 10A and 10B each including a plurality of light sources 11 arranged in a matrix in the X direction and the Y direction (third direction). Each of 10C and 10D includes a plurality of light sources 11 arranged in a matrix in the Z direction and the Y direction. In the light combining plate 20B, the band-shaped reflection region 22 and the band-shaped transmission region 23 are orthogonal to the Y direction. The band-like reflection areas 22 and the band-like transmission areas 23 are alternately arranged in the Y direction in the light combining plate 20C, and the band-like reflection areas 22 and the band-like are arranged in the light combining board 20A. The transmission regions 23 are arranged in a checkered pattern, and light from a plurality of light sources 11 enters each of the belt-like reflection regions 22 and each of the belt-like transmission regions 23. In the reflection area 22 of the light combining plate 20C, the light BA from the light source 11 of the light source unit 10A and the light BD from the light source 11 of the light source unit 10D are alternately incident in the W direction and transmitted through the light combining plate 20C. In the region 23, the positions of the light source units 10A to 10D are adjusted so that the light BB from the light source 11 of the light source unit 10B and the light BC from the light source 11 of the light source unit 10C are alternately incident in the W direction. Yes.

  Also in the second embodiment, the same advantages as in the first embodiment can be obtained. That is, by combining the light beams BA to BD from the four light source units 10A to 10D, the luminance of the emitted light can be increased (higher luminance). Further, since the light beams from the light source units 10B to 10D are inserted into the gaps in the W direction and the Y direction of the light beam from the light source unit 10A and combined, the increase in the light beam size of the emitted light is suppressed. Can do. As a result, it is not necessary to increase the optical element at the subsequent stage, and the light source device 100 and the projector device 1 can be reduced in size.

  Moreover, since it is not necessary to reduce the space | interval of the light source 11 in light source unit 10A-10D for size reduction, the cooling performance by the cheap cooling mechanism using the heat sink 13 is not impaired.

(Embodiment 3)
In the first and second embodiments, the light source device 100 includes four light source units 10A to 10D and three light combining plates 20A to 20C. In Embodiment 3, the light source device 100 includes three light source units 10A to 10C and two light combining plates 20A and 20B.

  In the first and second embodiments, in addition to the light combining function in which the light combining plate 20A combines the light beams from the light source units 10A to 10D, the blue light beam B3 for the excitation light of the phosphor wheel 30 and the image light are used. A light separation function for separating the blue light beam B4 was provided. In the third embodiment, a light separation plate for separating the blue light beam B3 for the excitation light of the phosphor wheel 30 and the blue light beam B4 for the image light is provided separately from the light synthesis plate.

  Hereinafter, the configuration of the light source device according to the third embodiment will be described with reference to FIGS. FIG. 13 is a diagram illustrating a configuration of the light source device according to the third embodiment. In FIG. 13, a direction perpendicular to the W direction and forming an angle of 45 degrees with respect to the −X direction and the Y direction is shown as the V direction. The light source device 100 of the third embodiment is different from the light source device 100 of the first embodiment in that the four light source units 10A to 10D and the three light combining plates 20A to 20C are replaced with three light source units 10A to 10C and two light combining plates 20A. , 20B. Furthermore, the light source device 100 of Embodiment 3 includes a light separation plate 181 and a mirror 162.

  The light source unit 10A is arranged such that a plurality of light sources are arranged on the XY plane, and emits a light beam BA in the Z direction.

  The light source unit 10B and the light source unit 10C are disposed so as to face each other in the X direction and to be adjacent to the light source unit 10A in a substantially L shape. The light source unit 10B is arranged so that a plurality of light sources are arranged on the YZ plane, and emits a light beam BB in the −X direction. The light source unit 10C is arranged such that a plurality of light sources are arranged on the YZ plane, and emits a light beam in the X direction.

  The light combining plate 20A is arranged to form an angle of 45 degrees with respect to the light beam BA from the light source unit 10A and the light beam BB from the light source unit 10B. The light combining plate 20B is arranged so as to form an angle of 45 degrees with respect to the light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C. These photosynthesis plates 20A and 20B are orthogonal to each other in the XZ plane.

  The light combining plate 20A transmits the light beam BA from the light source unit 10A and reflects the light beam BB from the light source unit 10B. Thereby, these light beams are combined and emitted in the Z direction. The light combining plate 20B transmits the light beam BA from the light source unit 10A and reflects the light beam BC from the light source unit 10C. Thereby, these light beams are combined and emitted in the Z direction. Hereinafter, the photosynthetic plates 20A and 20B will be described in more detail with reference to FIGS.

  FIG. 14 is a diagram illustrating the configuration of the photosynthetic plate 20A. FIG. 14 is a view of the light combining plate 20A viewed from the light source unit 10A side. In the light combining plate 20A, transmission regions 23 that transmit light and reflection regions 22 that reflect light are alternately arranged in the V direction. The transmissive region 23 transmits the light beam BA (white circle) from the light source unit 10A. The reflection region 22 reflects the light beam BB (vertical stripe circle) from the light source unit 10B.

  In addition, a transmission region 23 is formed between the reflection regions 22 in the Y direction on the light combining plate 20A. Thereby, a part of the light beam BC (black circle) from the light source unit 10C that reaches the light combining plate 20A before being reflected by the light combining plate 20B is transmitted without being disturbed, and this light beam BC can be guided to the light combining plate 20B. . Further, a part of the light beam BC (black circle) from the light source unit 10C reflected by the light combining plate 20B and reaching the light combining plate 20A can be transmitted without being disturbed and emitted in the Z direction.

  FIG. 15 is a diagram illustrating the configuration of the photosynthetic plate 20B. FIG. 15 is a view of the light combining plate 20B viewed from the light source unit 10A side. In the light combining plate 20B, transmissive regions 23 that transmit light and reflective regions 22 that reflect light are alternately arranged in the Y direction and alternately in the W direction. The transmissive region 23 transmits the light beam BA (white circle) from the light source unit 10A. The reflection region 22 reflects the light beam BC (black circle) from the light source unit 10C.

  In addition, a transmission region 23 is formed between the reflection regions 22 in the Y direction on the light combining plate 20B. Accordingly, a part of the light beam BB (vertical stripe circle) from the light source unit 10B that reaches the light combining plate 20B before being reflected by the light combining plate 20A is transmitted without being disturbed, and this light beam BB is guided to the light combining plate 20A. it can. Further, a part of the light beam BB (vertical stripe circle) from the light source unit 10B reflected by the light combining plate 20A and reaching the light combining plate 20B can be transmitted without being disturbed and emitted in the Z direction.

  With the above configuration, the light combining plates 20A and 20B are arranged so that light from the light source unit 10B (vertical stripes) is inserted between light from the light source unit 10A (white circles) in the V direction and from the light source unit 10C. From the light source unit 10A, the light beam BB from the light source unit 10B, and the light source unit 10C so that the light (black circle) is inserted between the light (white circles) from the light source unit 10A in the Y direction and the W direction. Are combined with each other and emitted as a combined light flux.

  Returning to FIG. 13, the light separating plate 181 is disposed so as to form an angle of 45 degrees with respect to the combined light flux from the light combining plates 20A and 20B. The light separation plate 181 transmits a part of the combined light beam and emits it in the Z direction as a combined light beam (blue component excitation light) B3. Further, the light separation plate 181 reflects the remaining light beams in the combined light beam, separates these light beams from the combined light beam B3, and emits them as a combined light beam (blue component of video light) B4 in the direction opposite to the X direction. Hereinafter, the light separation plate 181 will be described in more detail with reference to FIG.

  FIG. 16 is a diagram illustrating a configuration of the light separation plate 181 according to the third embodiment. FIG. 16 is a view of the light separation plate 181 as seen from the light source unit 10A side. The light separation plate 181 includes a substrate 21 having light transparency such as glass. The light separation plate 181 includes an upper region 20Au divided in three in the -Y direction, an intermediate region 20Am, and a lower region 20Al.

  In the upper region 20Au and the lower region 20Al, only the transmission region 23 that transmits light is disposed. The transmissive region 23 in these regions 20Au and 20Al transmits the light flux from the photosynthetic plates 20A and 20B.

  On the other hand, in the intermediate region 20Am, reflective regions 22 that reflect light and transmissive regions 23 that transmit light are alternately arranged in the V direction. The reflection region 22 in the intermediate region 20Am reflects a light beam (white circle) incident on the intermediate region 20Am out of the light beams from the light combining plates 20A and 20B. The transmission region 23 in the intermediate region 20Am transmits a light beam (black circle and vertical stripe circle) incident on the intermediate region 20Am out of the light beams from the light combining plates 20A and 20B.

  As a result, the light separation plate 181 includes the light beams from the light combining plates 20A and 20B in the upper region 20Au and the lower region 20Al, and the light beams BB and BC from the light source units 10B and 10C in the intermediate region 20Am (black circles and vertical stripes). (Circle) is emitted as a combined luminous flux (blue component excitation light) B3. The light separating plate 181 separates the light beam BA (white circle) from the light source unit 10A in the intermediate region 20Am from the light beams from the light combining plates 20A and 20B from the combined light beam (blue component excitation light) B3, It is emitted as a synthetic light beam (blue component of video light) B4.

  Returning to FIG. 13, the combined light beam B <b> 3 passes through the lens 142, the diffusion plate 151, the dichroic mirror 171, and the lenses 143 and 144 and enters the phosphor wheel 30 as blue excitation light. In the phosphor wheel 30, a yellow (red + green) light beam Y <b> 1 is emitted using the blue combined light beam B <b> 3 as excitation light, and this light beam Y <b> 1 enters the dichroic mirror 171 through the lenses 144 and 143.

  On the other hand, the separated blue light beam B <b> 4 enters the dichroic mirror 171 through the lens 145, the mirror 162, the diffusion plate 152, the lens 146, and the mirror 161. The mirror 162 changes the optical path of the combined light beam (blue component of video light) B4 separated by the light separation plate 181 by approximately 90 degrees. In the dichroic mirror 171, the yellow (red + green) light beam Y1 and the blue light beam B4 are two-dimensionally combined and emitted.

  As described above, in the second embodiment, the light source device 100 includes the light source unit (first light source unit) 10C, the light source unit (second light source unit) 10B, the light source unit (third light source unit) 10A, A light combining plate (first mirror portion) 20A and a light combining plate (second mirror portion) 20B are provided. The light source unit 10C includes a plurality of light sources 11 that emit light in the X direction (first direction). The light source unit 10B is disposed to face the light source unit 10C and includes a plurality of light sources 11 that emit light in the direction opposite to the X direction. The light source unit 10A includes a plurality of light sources 11 that emit light in the Z direction (second direction). The light combining plate 20A transmits the light emitted from the light source 11 of the light source unit 10A, and reflects the light emitted from the light source of the light source unit 10B in the Z direction. The light combining plate 20B transmits the light emitted from the light source 11 of the light source unit 10A and reflects the light emitted from the light source 11 of the light source unit 10C in the Z direction. In the light combining plates 20A and 20B, transmission regions 23 that transmit incident light and reflection regions 22 that reflect incident light are alternately arranged.

  In the second embodiment, in the light source device 100, each of the light source units 10C and 10B includes a plurality of light sources 11 arranged in a matrix in the Z direction and the Y direction, and the light source unit 10A has an X direction. And a plurality of light sources 11 arranged in a matrix in the Y direction, and in the light combining plate 20A, the reflection region 22 is disposed across the transmission region 23 in each of the Y direction and the V direction. The reflection region 22 is disposed with the transmission region 23 interposed therebetween in each of the Y direction and the W direction, and the light from the light sources 11 of the light source units 10C, 10B, and 10A does not overlap each other in the light combining plates 20B and 20A. The positions of the light source units 10C, 10B, and 10A are adjusted so as to be incident on the light source.

  In the third embodiment, the same advantages as in the first embodiment can be obtained. That is, by combining the light beams BA to BC from the three light source units 10A to 10C, the luminance of the emitted light can be increased (high luminance). Further, since the light beams from the light source units 10B to 10C are inserted into the gaps in the W direction and the Y direction of the light beam from the light source unit 10A and combined, it is possible to suppress an increase in the light beam size of the emitted light. Can do. As a result, it is not necessary to increase the optical element at the subsequent stage, and the light source device 100 and the projector device 1 can be reduced in size.

  Moreover, since it is not necessary to reduce the space | interval of the light source 11 in light source unit 10A-10C for size reduction, the cooling performance by the cheap cooling mechanism using the heat sink 13 is not impaired.

  Furthermore, since the number of light source units and the number of light combining plates are smaller in the third embodiment than in the first and second embodiments, the light source device 100 and the projector device 1 can be further downsized. The light source device 100 according to the third embodiment is suitable when a reduction in size is desired rather than an increase in luminance.

(Embodiment 4)
In the first embodiment, the light source device 100 generates a combined light beam in which the yellow (red + green) light beam Y1 and the blue light beam B4 are two-dimensionally arranged, and the image generation unit 300 includes three DMDs 310R, Using 310G and 310B, red light, green light, and blue light of the combined light flux were respectively modulated. In Embodiment 4, the light source device 100 emits a yellow (including red) light beam, a green light beam, and a blue light beam at different timings, and the image generation unit 300 uses one DMD to generate yellow light ( (Including red light), green light, and blue light are modulated at different timings.

  Hereinafter, the configuration of the projector apparatus according to the fourth embodiment will be described with reference to FIGS. FIG. 17 is a diagram illustrating a configuration of the projector apparatus according to the fourth embodiment. The projector device 1 according to the fourth embodiment is different from the projector device 1 according to the first embodiment in the configuration of the light source device 100 and the video generation unit 300. Hereinafter, the light source device 100 and the video generation unit 300 will be described in order.

  FIG. 18 is a diagram illustrating a configuration of the light source device according to the fourth embodiment. The light source device 100 according to the fourth embodiment is different from the light source device 100 according to the first embodiment in the shapes of the reflection region 22 and the transmission region 23 and the shape of the phosphor wheel 30 in the light combining plate 20A. The light source device 100 according to the fourth embodiment further includes mirrors 163, 164, and 165 instead of the lenses 145 and 146, the diffusion plate 152, and the mirror 161.

  The light combining plate 20A according to the fourth embodiment is different from the light combining plate 20A according to the first embodiment shown in FIG. 3 in that the light combining function is not provided. That is, the light combining plate 20A reflects all of the light beam BA from the light source unit 10A and transmits all of the light beam BC from the light source unit 10C, thereby combining these light beams and combining the light beams (excitation light of the blue component). ) Emit in the X direction as B1. Hereinafter, the photosynthetic plate 20A will be described in more detail with reference to FIG.

  FIG. 19 is a diagram illustrating a configuration of a photosynthesis plate 20A according to the fourth embodiment. The light combining plate 20A of the fourth embodiment shown in FIG. 19 is compared with the light combining plate 20A of the first embodiment shown in FIG. 4 in the light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C in the intermediate region 20Am. And the correspondence relationship between the reflection region 22 and the transmission region 23 is the same as that in the upper region 20Au and the lower region 20Al. Thus, the light combining plate 20A does not have a light separation function, and light (black circles) from the light source unit 10C from the light source unit 10A in the Y direction in all the regions of the upper region 20Au, the intermediate region 20Am, and the lower region 20Al. The light beam BA from the light source unit 10A and the light beam BC from the light source unit 10C are combined so as to be inserted between the light (white circles) and emitted as a combined light beam (blue component excitation light) B1.

  The shapes of the reflection region 22 and the transmission region 23 in the light combining plate 20B of the fourth embodiment shown in FIG. 20 are the same as those of the light combining plate 20B of the first embodiment shown in FIG. Further, the shapes of the reflection region 22 and the transmission region 23 in the light combining plate 20C of the fourth embodiment shown in FIG. 21 are the same as those of the light combining plate 20B of the first embodiment shown in FIG.

  Returning to FIG. 18, the phosphor wheel 30 uses the blue combined light beam B <b> 3 from the light combining plate 20 </ b> C as excitation light, and the yellow light beam Y <b> 1 and the green light beam G <b> 1 (solid arrows) are different in directions opposite to the light incident direction. Lights at the timing. The phosphor wheel 30 transmits the blue light beam B3 from the light combining plate 20C as a blue light beam B4 (broken line arrow), and emits it at a timing different from the emission timing of the yellow light beam Y1 and the green light beam G1. Hereinafter, the phosphor wheel 30 will be described in more detail with reference to FIG.

  FIG. 22A is a diagram of the phosphor wheel 30 viewed from the side, and FIG. 20B is a diagram of the phosphor wheel 30 viewed from the incident direction of excitation light. The phosphor wheel 30 of the fourth embodiment shown in FIG. 22B is compared with the phosphor wheel 30 of the first embodiment shown in FIG. And having a phosphor region 36 and a notch region 37.

  In the phosphor region 35, a phosphor that emits yellow light having a main wavelength of 570 nm using light having a wavelength of about 450 nm as excitation light is applied in a fan shape centered on the rotation axis 30X on the incident surface side of the substrate 31. Has been. In the phosphor region 36, a phosphor that emits green light having a main wavelength of 552 nm using light having a wavelength of about 450 nm as excitation light is applied to the incident surface side of the substrate 31 in a fan shape centered on the rotation axis 30 </ b> X. Has been. The cutout region 37 is formed by cutting out a part in the circumferential direction of the phosphor wheel 30 into a sector shape centered on the rotation shaft 30X. The phosphor region 35 and the phosphor region 36 are formed so as to have substantially the same size. The phosphor region 35 and the phosphor region 36 are formed as regions larger than the notch region 37.

  The phosphor wheel 30 is configured such that the above-described two phosphor regions 35 and 36 and one notch region 37 rotate in one frame (for example, 1/60 second). Note that the rotation speed of the motor 32 is controlled so that the phosphor wheel 30 rotates once in a time corresponding to one frame.

  Thereby, the blue light from the light combining plate 20C is incident on the phosphor region 35, the phosphor region 36, and the cutout region 37 in order in a time corresponding to one frame. In the phosphor region 35, yellow fluorescence is emitted using incident light as excitation light, and emitted as a yellow light beam Y1 in a direction opposite to the light incident direction. In the phosphor region 36, green fluorescence is emitted using incident light as excitation light, and emitted as a green light beam G1 in a direction opposite to the light incident direction. On the other hand, in the cutout region 37, the incident light passes through as it is and is emitted in the light incident direction as a blue light beam B4.

  Returning to FIG. 18, the yellow light beam Y1 and the green light beam R1 from the phosphor wheel 30 are reflected by the dichroic mirror 171 through the lenses 144 and 143 and emitted. On the other hand, the blue light beam B4 from the phosphor wheel 30 is emitted through the dichroic mirror 171 with the optical path changed by 90 degrees by the lens 145 and the mirrors 163, 164, and 165. In this way, the yellow light beam Y1, the green light beam R1, and the blue light beam B4 are emitted at different timings.

  Returning to FIG. 17, the video generation unit 300 of the fourth embodiment includes one DMD 310 instead of the three DMDs 310R, 310G, and 310B, compared to the video generation unit 300 of the first embodiment shown in FIG. Further, the color prism 330 is not provided. The DMD 310 modulates yellow light, green light, and blue light incident through the total reflection prism 320 according to the video signal of each color received from the control unit according to the incident timing of each color light, and generates video light. .

  In the fourth embodiment, the same advantages as in the first embodiment can be obtained. That is, by combining the light beams BA to BD from the four light source units 10A to 10D, the luminance of the emitted light can be increased (higher luminance). Further, since the light beams from the light source units 10B to 10D are inserted into the gaps in the W direction and the Y direction of the light beam from the light source unit 10A and combined, the increase in the light beam size of the emitted light is suppressed. Can do. As a result, it is not necessary to increase the optical element at the subsequent stage, and the light source device 100 and the projector device 1 can be reduced in size.

  Moreover, since it is not necessary to reduce the space | interval of the light source 11 in light source unit 10A-10D for size reduction, the cooling performance by the cheap cooling mechanism using the heat sink 13 is not impaired.

  Furthermore, in the fourth embodiment, since the number of DMDs can be reduced in the video generation unit 300 and it is not necessary to provide a color prism, the projector device 1 can be further miniaturized.

(Other embodiments)
As described above, Embodiments 1 to 4 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1-4 and it can also be set as a new embodiment. Therefore, other embodiments will be exemplified below.

(1) In the first to fourth embodiments, the light source device 100 including the three light source units 10A to 10C and the two light combining plates 20A to 20B, or the four light source units 10A to 10D and the three light combining plates 20A to 20C. explained. This indication is not limited to this, It is applicable to the form provided with n light source units 10 and n-1 photosynthesis boards. Note that n is an integer of 3 or more.

(2) In the first to fourth embodiments, the antireflection film is formed on the light-transmitting substrate 21 such as glass in the transmissive region 23, but the transmissive region 23 is formed by cutting out the substrate 21. It may be a through hole or a slit.

(3) Moreover, in Embodiment 1-4, all the wavelengths of the emitted light of the light source 11 in light source unit 10A-10D may be the same, and may differ in a blue zone | band (440-470 nm). For example, the upper light source block 12u and the lower light source block 12l of the light source unit 10A, the upper light source block 12u and the lower light source block 12l of the light source unit 10C, all the light source blocks 12u, 12m, 12l of the light source unit 10B, and the light source unit 10D. The light sources 11 in all the light source blocks 12u, 12m, and 12l may be light sources that emit light having a wavelength suitable for exciting the phosphor. On the other hand, the light source 11 in the intermediate light source block 12m of the light source unit 10A and the intermediate light source block 12m of the light source unit 10C can obtain a desired color when combined with yellow fluorescent light emitted from the phosphor. A light source that emits light of a wavelength may be used.

(4) In Embodiments 1 to 4, the DMD is exemplified as the light modulation element. However, the light modulation element may be a liquid crystal panel. For example, as shown in FIG. 1, three liquid crystal panels such as a liquid crystal panel for red light modulation, a liquid crystal panel for green light modulation, and a liquid crystal panel for blue light modulation may be used. As shown in FIG. 17, red light modulation, green light modulation, and blue light modulation may be distinguished in terms of time using a single liquid crystal panel. The liquid crystal panel may be a transmissive type or a reflective type.

(5) In the first and fourth embodiments, in the light source device 100, the reflection regions 22 and the transmission regions 23 of the light combining plate 20A are alternately arranged in the Y direction, and the reflection regions 22 and the transmission regions 23 of the light combining plate 20B are arranged. Are alternately arranged in the W direction (direction orthogonal to the Y direction on the main surface), and the transmission regions 23 and the reflection regions 22 of the light combining plate 20C are alternately arranged in the Y direction and the W direction. The present disclosure is not limited to this, and the reflective region 22 and the transmissive region 23 of the photosynthetic plate 20A are alternately arranged in one direction of the Y direction and the W direction (direction orthogonal to the Y direction on the main surface), The reflection region 22 and the transmission region 23 of the light combining plate 20B are alternately arranged in the other direction of the Y direction and the W direction, the reflection region 22 and the transmission region 23 of the light combining plate 20C are arranged in one direction, and The form arrange | positioned alternately in the other direction may be sufficient.

(6) In the second embodiment, in the light source device 100, the reflection region 22 and the transmission region 23 of the light combining plate 20A are alternately arranged in the W direction (direction orthogonal to the Y direction on the main surface), and the light combining plate The reflection regions 22 and the transmission regions 23 of 20B are alternately arranged in the W direction, and the transmission regions 23 and the reflection regions 22 of the photosynthetic plate 20C are alternately arranged in the Y direction. The present disclosure is not limited to this, and the reflective region 22 and the transmissive region 23 of the photosynthetic plate 20A are alternately arranged in one direction of the Y direction and the W direction (direction orthogonal to the Y direction on the main surface), The reflection region 22 and the transmission region 23 of the light combining plate 20B are alternately arranged in the one direction, and the reflection region 22 and the transmission region 23 of the light combining plate 20C are alternately arranged in the other direction of the Y direction and the W direction. The form to arrange | position may be sufficient.

(7) In the third embodiment, in the light source device 100, the reflection region 22 and the transmission region 23 of the light combining plate 20A are alternately arranged in the V direction (the direction orthogonal to the Y direction on the main surface), and the light combining plate The reflection region 22 and the transmission region 23 of 20B were alternately arranged in the Y direction and in the W direction (a direction orthogonal to the Y direction on the main surface) (the W direction and the V direction are orthogonal). The present disclosure is not limited to this, and the reflection region 22 and the transmission region 23 of the light combining plate 20A are alternately arranged in one direction of the Y direction and the direction orthogonal to the Y direction on the main surface, and the light combining plate 20B The reflection region 22 and the transmission region 23 may be alternately arranged in the Y direction and the other direction of the principal surfaces in the direction orthogonal to the Y direction, or in the one direction and the other direction. .

(8) In the first embodiment, the light combining plate 20A and the light combining plate 20C are separated in the light source device 100. However, as shown in FIG. You may be comprised with a board.

  As described above, the embodiments have been described as examples of the technology in the present disclosure. For this purpose, the accompanying drawings and detailed description are provided.

  Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the above technique. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this indication, a various change, replacement, addition, abbreviation, etc. can be performed in a claim or its equivalent range.

  The present disclosure is applicable to a light source device that combines and uses light from a plurality of light sources, and a projection display apparatus using the light source device.

1 Projector device (projection display device)
DESCRIPTION OF SYMBOLS 100 Light source device 10A, 10B, 10C, 10D Light source unit 11 Light source 12u Upper light source unit 12m Intermediate light source unit 12l Lower light source unit 13 Heat sink 20A, 20B, 20C Photosynthesis board (mirror part)
21 Substrate 22 Reflection region 23 Transmission region 20Au Upper region 20Am Intermediate region 20Al Lower region 30 Phosphor wheel 30X Rotating shaft 31 Substrate 32 Motor 33 Phosphor 35, 36 Phosphor region 37 Notch region 141, 142, 143, 144, 145 146 Lens 151, 152 Diffusion plate 161, 162, 163, 164, 165 Mirror 171 Dichroic mirror 181 Light separation plate 200 Light guide optical system 210 Rod integrator 221, 222, 231, 232, 233 Lens 241, 242 Mirror 300 Image generation 310R, 310G, 310B, 310 DMD
320 Total Reflection Prism 321 322 Prism 325 Air Layer 330 Color Prism 331 332 333 Prism 335 336 Dichroic Mirror 400 Projection Optical System

Claims (8)

First and second light source units including a plurality of light sources juxtaposed in a first direction and emitting light in a second direction orthogonal to the first direction;
A third and fourth light source unit including a plurality of light sources juxtaposed in the second direction and emitting light in the first direction;
A first mirror portion that transmits the emitted light from the light source of the first light source unit and reflects the emitted light from the light source of the third light source unit in the second direction;
A second mirror part that transmits the light emitted from the first mirror part and reflects the light emitted from the fourth light source unit in the second direction;
A third mirror part that reflects light emitted from the light source of the second light source unit in the first direction, transmits light emitted from the light source of the third light source unit, and emits the light to the first mirror part; Prepared,
The first to third mirror units are light source devices in which transmission regions that transmit incident light and reflection regions that reflect incident light are alternately arranged. Each of the first to second light source units includes a plurality of light sources arranged in a matrix in the first direction and a third direction orthogonal to the first and second directions,
Each of the third to fourth light source units includes a plurality of light sources arranged in a matrix in the second direction and the third direction,
In the first mirror portion, the band-shaped reflection areas and the band-shaped transmission areas are alternately arranged in a fourth direction orthogonal to the third direction,
In the second mirror portion, the reflective region is disposed across the transmissive region in each of the third direction and the fourth direction,
In the third mirror portion, band-like reflection areas and band-like transmission areas are alternately arranged in the third direction,
In the reflection region of the first mirror unit, light from the light source of the second light source unit and light from the light source of the third light source unit are alternately incident in the third direction, and the second mirror The positions of the first to fourth light source units are adjusted such that light from the respective light sources of the first to fourth light source units is incident without overlapping each other.
The light source device according to claim 1. First and second light source units including a plurality of light sources juxtaposed in a first direction and emitting light in a second direction orthogonal to the first direction;
A third and fourth light source unit including a plurality of light sources juxtaposed in the second direction and emitting light in the first direction;
A first mirror portion that transmits the emitted light from the light source of the first light source unit and reflects the emitted light from the light source of the third light source unit in the second direction;
A second mirror part that transmits the light emitted from the first mirror part and reflects the light emitted from the fourth light source unit in the second direction;
A third mirror part that reflects light emitted from the light source of the second light source unit in the first direction, transmits light emitted from the light source of the fourth light source unit, and emits the light to the second mirror part; Prepared,
The first to third mirror units are light source devices in which transmission regions that transmit incident light and reflection regions that reflect incident light are alternately arranged. Each of the first to second light source units includes a plurality of light sources arranged in a matrix in the first direction and a third direction orthogonal to the first and second directions,
Each of the third to fourth light source units includes a plurality of light sources arranged in a matrix in the second direction and the third direction,
In the first mirror portion, the band-shaped reflection areas and the band-shaped transmission areas are alternately arranged in a fourth direction orthogonal to the third direction,
In the second mirror portion, strip-shaped reflection regions and strip-shaped transmission regions are alternately arranged in the third direction,
In the third mirror portion, the belt-like reflection region and the belt-like transmission region are arranged in a checkered pattern, and light from a plurality of light sources is incident on each of the belt-like reflection region and each belt-like transmission region,
In the reflection region of the second mirror unit, light from the light source of the second light source unit and light from the light source of the fourth light source unit are alternately incident in the fourth direction, and the second mirror The first to fourth light sources so that light from the light source of the first light source unit and light from the light source of the third light source unit are alternately incident in the fourth direction in the transmission region of the unit. The position of the unit has been adjusted,
The light source device according to claim 3. A first light source unit including a plurality of light sources that emit light in a first direction;
A second light source unit including a plurality of light sources arranged opposite to the first light source unit and emitting light in a direction opposite to the first direction;
A third light source unit including a plurality of light sources that emit light in a second direction orthogonal to the first direction;
A first mirror portion that transmits light emitted from the light source of the third light source unit and reflects light emitted from the light source of the second light source unit in the second direction;
A second mirror portion that transmits the emitted light from the light source of the third light source unit and reflects the emitted light from the light source of the first light source unit in the second direction;
The first and second mirror units are light source devices in which transmission regions that transmit incident light and reflection regions that reflect incident light are alternately arranged. Each of the first to second light source units includes a plurality of light sources arranged in a matrix in the second direction and a third direction orthogonal to the first and second directions,
The third light source unit includes a plurality of light sources arranged in a matrix in the first direction and the third direction,
In the first and second mirror portions, the reflection region is disposed with the transmission region interposed therebetween in each of the third direction and a fourth direction orthogonal to the third direction,
In the first and second mirror units, the positions of the first to third light source units are adjusted so that light from the respective light sources of the first to third light source units is incident without overlapping each other. ,
The light source device according to claim 5.   The light source device according to claim 1, wherein the light source is a laser diode or a light emitting diode that outputs blue light. A light source device according to any one of claims 1 to 7,
A video generation unit for generating video light by modulating light from the light source device with a video signal;
A projection display apparatus comprising: an optical system that projects the image light.

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