JP2014235250A - Light source device and projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source device using a phosphor, and a projector including the same.SOLUTION: A light source device includes a light source, phosphor layer, and movement mechanism. The light source emits excitation light in a first wavelength region. The phosphor layer includes a phosphor and silicone-based binder, and upon incident of the excitation light, transmits a part of the excitation light and emits light having a second wavelength region longer than the first wavelength region. The phosphor layer combines the transmitted excitation light and the emitted light having the second wavelength region and emits the combined light. The movement mechanism moves the position on the phosphor layer irradiated with the excitation light over time.

Description

  The present technology relates to a light source device and a projector equipped with the light source device.

  Recently, an increasing number of products adopt solid light sources such as LEDs (Light Emitting Diodes) and LDs (Laser Diodes) instead of conventional mercury lamps or xenon lamps as light sources used in projectors for presentations or digital cinema. Yes. A fixed light source such as an LED has a long life and does not require replacement of a conventional lamp, and has an advantage that it is turned on immediately after the power is turned on.

  For example, the illumination device described in Patent Document 1 includes an excitation light source, a phosphor that is irradiated with excitation light from the excitation light source, and a drive unit that moves the irradiation position of the excitation light to the phosphor with time. . For example, when a blue laser is used as the excitation light and the phosphor layer is irradiated with the excitation light, for example, yellow light is generated. Since part of the blue excitation light is transmitted through the phosphor layer, yellow light and blue light are mixed to generate white light (for example, paragraph [0031] in the specification of Patent Document 1 and FIG. 2). reference).

JP 2012-3923 A

  In order to actually realize the phosphor that is irradiated with the excitation light as described above, it is necessary to further devise the phosphor.

  An object of the present technology is to provide a light source device using a phosphor and a projector including the light source device.

In order to achieve the above object, a light source device according to the present technology includes a light source, a phosphor layer, and a moving mechanism.
The light source emits excitation light in a first wavelength range.
The phosphor layer includes a phosphor and a silicone-based binder. When the excitation light is incident, the phosphor layer transmits a part of the excitation light and has a second wavelength range longer than the first wavelength range. Emits light having The phosphor layer synthesizes the transmitted excitation light and the emitted light having the second wavelength range and emits the synthesized light.
The moving mechanism moves the irradiation position of the excitation light to the phosphor layer with time.

  The phosphor layer may have a thickness of 40 μm or more and 120 μm or less. By keeping the thickness of the phosphor layer within this range, a high-quality phosphor layer can be formed.

  The phosphor is a YAG (Yttrium Aluminum Garnet) based material, and the average particle size of the phosphor particles may be 10 μm to 30 μm, or 15 μm to 20 μm. In order to realize the phosphor layer having the above-described thickness, it is possible to form a high-quality phosphor layer by keeping the average particle diameter of the phosphor particles within this range.

  The moving mechanism may include a support that supports the phosphor layer, and relatively move the support and the light source.

  The moving mechanism may include a rotating plate as the support and a driving unit that drives the rotating plate.

A projector according to the present technology includes the above-described light source device, an image generation unit, and a projection unit.
The image generation unit generates an image using light emitted from the light source device. The projection unit projects the image generated by the image generation unit.

  As described above, according to the present technology, it is possible to realize a light source device using a phosphor and a projector including the light source device.

1A and 1B are perspective views illustrating a configuration example of a light source device according to an embodiment of the present technology. FIG. 2 is a plan view of the light source device shown in FIG. 1B as viewed from above. FIG. 3 is a perspective view illustrating a configuration example of a light collecting unit provided in the light source device of FIGS. 1A and 1B. FIG. 4 is a perspective view showing a configuration example of a light collecting unit provided in the light source device of FIGS. 1A and 1B. FIG. 5 is a plan view of the light collecting unit shown in FIG. 4 as viewed from above. FIG. 6 schematically shows a fluorescence optical unit provided in the light source device of FIGS. 1A and 1B. 7A and 7B are plan views showing the first surface and the second surface of the transparent substrate of the fluorescence optical unit, respectively. FIG. 8 is a graph showing emission spectra when the phosphor Y3Al5O12: Ce having three types of average particle diameters is excited with excitation light having a central wavelength of 460 nm. FIG. 9 is a graph showing excitation spectra of phosphors Y3Al5O12: Ce having three types of average particle diameters. FIG. 10 is a graph showing emission spectra for the phosphor Y3 (Al, Ga) 5O12: Ce having three kinds of average particle diameters and the phosphor Lu3Al5O12: Ce having one kind of average particle diameter. FIG. 11 is a graph showing excitation spectra for phosphor Y3 (Al, Ga) 5O12: Ce having three types of average particle diameters and phosphor Lu3Al5O12: Ce having one type of average particle diameter. FIG. 12 is a schematic diagram illustrating a configuration example of a projector according to an embodiment of the present technology.

  Hereinafter, embodiments of the present technology will be described with reference to the drawings.

[Light source device]
FIG. 1 is a perspective view illustrating a configuration example of a light source device according to an embodiment of the present technology. The light source device 100 is for a projector of a type that emits white light by combining light in a blue wavelength region and light in a red wavelength region that is generated from a fluorescent material excited by the laser light and in a green wavelength region. It is a light source device.

  As shown in FIG. 1A, the light source device 100 includes a base 1 provided at the bottom and a side wall 2 fixed to the base 1. The light source device 100 also includes a front surface portion 3 and an upper surface portion 4 connected to the side wall portion 2, and a lid portion 5 connected to the upper surface portion 4. The side wall portion 2, the front surface portion 3, the upper surface portion 4 and the lid portion 5 constitute a housing portion 10 of the light source device 100.

  The base 1 has a shape that is long in one direction. The longitudinal direction in which the base 1 extends is the left-right direction of the light source device 100, and the short direction perpendicular to the longitudinal direction is the front-rear direction. Accordingly, one of the two long portions facing each other in the short direction is the front side 6 and the other is the rear side 7. Further, the direction perpendicular to both the longitudinal direction and the short direction is the height direction of the light source device 100. In the example shown in FIG. 1, the x-axis, y-axis, and z-axis directions are the left-right direction, the front-rear direction, and the height direction, respectively.

  FIG. 1B is a diagram in which illustration of the front surface portion 3, the upper surface portion 4, and the lid portion 5 is omitted, and is a diagram illustrating an internal configuration example of the light source device 100. As shown in FIG. 1B, the side wall portion 2 has a notch 9 formed in the center of the front side 6, and an opening 11 formed in the rear side 7. A fluorescence optical unit 50 is disposed in a notch 9 on the front side 6 of the side wall 2. The fluorescence optical unit 50 is fixed to the base 1 through the notch 9 so that the light emission side faces the front side. Accordingly, the optical axis C of the light emitted from the fluorescence optical unit 50 extends along the direction parallel to the y axis through the approximate center of the base 1 when viewed in plan (see FIG. 2).

  Two condensing units 30 are arranged on the rear side 7 of the fluorescence optical unit 50. The light collecting unit 30 is arranged with the optical axis C symmetrical. Each condensing unit 30 includes, for example, a laser light source 31 that emits laser light as a light source that emits excitation light in the first wavelength region. For example, a plurality of laser light sources 31 are provided.

  FIG. 2 is a plan view of the light source device 100 shown in FIG. 1B as viewed from above.

  The condensing unit 30 condenses the light source unit 32 including a plurality of laser light sources 31 and the laser beams B1 emitted from the plurality of laser light sources 31 in a predetermined condensing area (or condensing point) 8. And an optical system 34. The condensing unit 30 includes a main frame 33 (see FIGS. 1B and 3) that supports the light source unit 32 and the condensing optical system 34 as one unit.

  As shown in FIG. 1B, two light source units 32 are arranged in the longitudinal direction in the opening 11 on the rear side 7 of the side wall 2. Each condensing unit 30 condenses the laser light from the plurality of laser light sources 31 on the fluorescence optical unit 50.

  The plurality of laser light sources 31 are, for example, blue laser light sources that can oscillate blue laser light B1 having a peak wavelength of emission intensity in a wavelength range of 400 nm to 500 nm as a first wavelength range. As the laser light source 31, other solid light sources such as LEDs may be used instead of a light source that emits laser light.

  As shown in FIG. 1A, the upper surface portion 4 is disposed above the two light collecting units 30. The upper surface part 4 is connected to the side wall part 2 and the two light collecting units 30. The front surface portion 3 is connected to the fluorescence optical unit 50, the upper surface portion 4 and the base 1. The lid 5 is disposed so as to cover the region between the two light collecting units 30 and is connected to the upper surface 4.

  A method for fixing and connecting the members is not limited. For example, the members are engaged with each other through a predetermined engaging portion, and the members are fixed and connected by screwing or the like.

  As shown in FIG. 2, the condensing optical system 34 includes an aspherical mirror 35 and a flat mirror 36. The aspherical mirror 35 reflects the light emitted from the plurality of laser light sources 31 and focuses it on the flat mirror 36. The flat mirror 36 reflects the reflected outgoing light so that the outgoing light reflected by the aspherical mirror 35 is condensed on the predetermined condensing area 8 as described above. As will be described later, the condensing area 8 is disposed in the phosphor layer 53 of the phosphor unit included in the fluorescence optical unit 50.

  The main frame 33 supports the light source unit 32, the aspherical mirror 35, and the flat mirror 36 as one unit.

  3 and 4 are perspective views showing a configuration example of the light collecting unit 30. FIG. In FIG. 4, the main frame 33 is not shown. FIG. 5 is a plan view of the light collecting unit 30 shown in FIG. 4 as viewed from above.

  As shown in FIG. 3, as described above, the condensing unit 30 includes the light source unit 32, the condensing optical system 34 (the aspherical mirror 35 and the flat mirror 36), and the main frame 33 that supports them as one unit. Have If these can be integrally supported as one unit, the shape and size of the main frame 33 are not limited. Typically, a main frame 33 having a form like a housing is used so that the blue laser light B1 does not leak outside.

  As shown in FIG. 4, in the present embodiment, a laser light source array having 28 laser light sources 31 is used as the light source unit 32. Four laser light sources 31 are arranged in the left-right direction (x-axis direction) of the light source device 100 and seven in the height direction (z-axis direction).

  The light source unit 32 is supported by a frame 39 in which an opening 38 is formed. A mounting substrate 41 (see FIG. 5) on which a plurality of laser light sources 31 are mounted is disposed on the back surface 40 (the surface on the rear side 7) of the frame 39. The plurality of laser light sources 31 emit blue laser light B1 through the opening 38 of the frame 39 in the forward direction and parallel to the y-axis.

  The light source unit 32 has collimator lenses 43 provided corresponding to the positions of the laser light sources 31 on the front surface 42 side of the frame 39. That is, 28 collimator lenses are provided. The collimator lens 43 is a rotationally symmetric aspherical lens, and makes the blue laser light B1 emitted from each laser light source 31 into a substantially parallel light beam. In the present embodiment, a lens unit 44 in which four collimator lenses 43 arranged in a straight line are integrally formed is used. Seven lens units 44 are arranged along the z direction. The lens unit 44 is held by a fixing member 45 fixed to the frame 39.

  The configuration of the light source unit 32 is not limited, and the frame 39 may not be used. The number and arrangement of the laser light sources 31 and the configuration of the collimator lens 43 are not limited.

  In the drawing, some of the light beams of the blue laser light B1 emitted from the laser light source 31 (collimator lens 43) are shown.

  On the front side 6 of the plurality of laser light sources 31, the aspherical mirror 35 is disposed obliquely with respect to the direction along the plane (xz plane) of the arrangement surface 42 on which the plurality of laser light sources 31 are disposed. As a result, the blue laser beam B1 is reflected toward the flat mirror 36. The aspherical mirror 35 is typically a mirror-like concave reflecting surface, and the shape thereof is designed so that the blue laser light B1 from the plurality of laser light sources 31 can be reflected and condensed. The material of the reflecting member 48 is not limited, and for example, a metal material or glass is used.

  As shown in FIGS. 4 and 5, the aspherical mirror 35 is fixed and supported by a support member 49. The plane mirror 36 is supported by the adjustment mechanism 60. The adjustment mechanism 60 is attached to the main frame 33 or the frame 39 and can adjust the position and / or angle of the plane mirror 36.

  FIG. 6 schematically shows the fluorescence optical unit 50. The fluorescence optical unit 50 includes a phosphor unit 58 and a fluorescence light collimator lens 57.

  The phosphor unit 58 includes a transparent substrate 51 that is a disk-shaped rotating plate, a motor 52 as a drive unit that rotates the transparent substrate 51, and a phosphor layer 53 provided on one surface side of the transparent substrate 51. . The transparent substrate 51 functions as a support that supports the phosphor layer 53. For convenience of explanation, of both surfaces of the transparent substrate 51, the surface on the side on which the blue laser light B1 is incident is defined as a first surface, and the surface opposite to the first surface is defined as a second surface.

  7A and 7B are plan views showing the first surface and the second surface of the transparent substrate 51, respectively. An antireflection layer 55 is provided on the first surface of the transparent substrate 51. The phosphor layer 53 is provided on the second surface side of the transparent substrate 51, and a dichroic layer 54 is provided between the transparent substrate 51 and the phosphor layer 53.

  The antireflection layer 55 has a function of transmitting the blue laser light B1 and suppressing the reflection. Blue laser light B1 that has passed through the antireflection layer 55, the transparent substrate 51, and the dichroic layer 54 is incident on the phosphor layer 53 as excitation light. The phosphor layer 53 has a function of transmitting a part of the blue laser light B1 incident as excitation light (including light that is scattered and transmitted) and absorbing the rest. Due to the absorbed excitation light, the phosphor layer 53 generates light having a second wavelength range longer than the wavelength range of the excitation light. The phosphor layer 53 synthesizes the transmitted blue light B2 and the light having the second wavelength range, here yellow light including the red light R2 and the green light G2 (for example, the peak wavelength is 500 to 600 nm). This is emitted. That is, the phosphor layer 53 emits white light.

  The dichroic layer 54 has a function of transmitting the blue laser light B <b> 1 transmitted through the transparent substrate 51 and reflecting yellow light generated in the phosphor layer 53. The dichroic layer 54 is formed of, for example, a dielectric multilayer film.

  As shown in FIG. 6, the relative arrangement of the condensing unit 30 and the fluorescent optical unit 50 is designed so that the condensing area 8 is located at a position where the phosphor layer 53 is arranged. The width of the phosphor layer 53 in the radial direction is set larger than the spot size of the condensing area 8. The same applies to the width of the dichroic layer 54 in the radial direction. The radial width of the antireflection layer 55 is set larger than the width of the phosphor layer 53, but may be the same as that.

  The rotating shaft 56 of the motor 52 coincides with the center of the transparent substrate 51 on which these layers are formed. When the excitation light is incident on the phosphor layer 53, the motor 52 rotates the transparent substrate 51, so that the irradiation position of the excitation light moves on the circumference with respect to the phosphor layer 53 with time. Thereby, the temperature rise of the irradiation position in the fluorescent substance layer 53 can be suppressed, and it can prevent that the luminous efficiency of the fluorescent substance layer 53 falls. In addition, it takes some time (for example, several nanoseconds) for the phosphor atoms to absorb the excitation light and emit light, and even if the next excitation light is irradiated to the phosphor atoms during the excitation period, It does not emit light. However, since the irradiation position of the excitation light of the phosphor layer 53 moves with time as in the present embodiment, phosphor atoms that are not excited are arranged one after another at the irradiation position of the excitation light, The phosphor layer 53 can emit light efficiently. Thus, the motor 52 and the transparent substrate 51 function as a moving mechanism that moves the phosphor layer 53 with time.

  The fluorescent light collimator lens 57 has a function of making light emitted from the phosphor layer 53 substantially parallel light. The optical axis of the fluorescent light collimator lens 57 (optical axis C in FIG. 2) is disposed at a position shifted from the rotation axis 56 of the motor 52.

  For example, sapphire is used as the material of the transparent substrate 51, but glass or other transparent materials may be used. For example, a DC brushless motor is used as the motor 52.

  The phosphor layer 53 includes a predetermined phosphor and a silicone binder. The phosphor layer 53 is formed by printing using a plate, but is particularly preferably formed by screen printing. According to screen printing, the film thickness and density of the phosphor layer 53 can be made uniform. Since the phosphor layer 53 moves with time, if the film thickness and density of the phosphor layer 53 are uneven, the light intensity and color of the emitted light may change over time, which causes flickering of the displayed image. Appears as In the present embodiment, the light intensity and color of the emitted light can be made uniform in the entire phosphor layer 53 by making the film thickness and concentration uniform.

  The thickness of the phosphor layer 53 is, for example, not less than 40 μm and not more than 120 μm. When the thickness of the phosphor layer 53 is within this range, a good-quality phosphor can be formed. In particular, the thickness is preferably 60 μm or more and 80 μm or less. The average particle diameter, which is the average value of the diameters of the phosphor particles, is, for example, 10 μm or more and 30 μm or less. In particular, the average particle diameter is preferably 15 μm or more and 20 μm or less.

[Example of phosphor material of phosphor layer]
Examples of materials that can be used as the phosphor according to the present technology are listed below.

(A) Y3Al5O12: Ce (average particle diameter: 10 μm, 15 μm, 25 μm)
(B) Y3 (Al, Ga) 5O12: Ce (average particle size: 10 μm, 15 μm, 20 μm)
(C) Lu3Al5O12: Ce (average particle size: 20 μm)

  The phosphors (a) and (b) are YAG (Yttrium Aluminum Garnet) materials, and the phosphor (c) is a LuAG (Lutetium Aluminum Garnet) materials. In the case of YAG, compared with other phosphor materials, the resistance in a high temperature environment by irradiation with laser light is high. In addition, it has a good compatibility with blue excitation light, and there is an advantage that emitted light with high intensity according to the intensity can be obtained by irradiation with high intensity excitation light.

  As the phosphor (a) (Y3Al5O12: Ce), for example, a material having an average particle diameter of 10 μm, 15 μm, and 25 μm can be appropriately selected. As the phosphor (b) (Y3 (Al, Ga) 5O12: Ce), for example, a material having an average particle diameter of 10 μm, 15 μm, and 20 μm can be appropriately selected. The average particle size of the phosphor (c) (Lu3Al5O12: Ce) is only one type of 20 μm.

  As described above, the thickness of the phosphor layer 53 is set to 40 μm or more and 120 μm or less. When the thickness of the phosphor layer 53 exceeds 120 μm, it becomes difficult to form a film with a uniform thickness of the phosphor layer 53, and it becomes difficult to form the phosphor layer 53 by a coating process by printing.

  Specifically, when using particles having a large particle size (for example, those having an average particle size exceeding 30 μm) in order to increase the thickness of the phosphor layer 53, ensure a uniform thickness accordingly. It is because it is not possible. Further, when such a large particle size particle is used, the volume occupied by the binder or filler for filling the gap between the particles in the entire phosphor layer 53 becomes large, and the light emission efficiency decreases. On the other hand, there is a fact that the luminous efficiency is lowered even when particles having a too small particle size (for example, those having a diameter smaller than 10 μm) are used. Therefore, as described above, the phosphor layer 53 is desired to be formed with an optimum film thickness and particle size.

  FIG. 8 shows a spectrum (emission spectrum) of emitted light when a phosphor (a) (Y3Al5O12: Ce) having an average particle diameter of 10 μm, 15 μm and 25 μm is excited with excitation light having a central wavelength of 460 nm. Show. The relative light emission intensity ratio (%) on the vertical axis is obtained when the emission intensity when a standard phosphor is similarly excited with the same intensity using excitation light having a central wavelength of 460 nm is assumed to be 100%. Relative strength. From this graph, it was found that the peak wavelength of the emitted light was 550 nm or more and 560 nm or less (for example, about 555 nm), and the relative emission intensity ratio of all the phosphors having three kinds of average particle diameters exceeded 130%.

  FIG. 9 shows excitation spectra of phosphors (a) (Y3Al5O12: Ce) having three types of average particle diameters. The vertical axis represents the relative excitation efficiency (%). Specifically, the excitation light that can excite the phosphor (a) with the highest emission intensity, and the energy of the excitation light and emission light when the phosphor (a) is excited. This ratio is 100%.

  FIGS. 10 and 11 show phosphors (b) (Y3 (Al, Ga) 5O12: Ce) having three types of average particle diameters and phosphors (c) (Lu3Al5O12: Ce) having one type of average particle diameters. ) Shows an emission spectrum and an excitation spectrum similar to those in FIGS.

  From FIG. 10, it was found that the relative emission intensity ratio exceeded 130% for all these four types of phosphor materials. The peak wavelengths of the emitted light of the phosphors (b) and (c) are 535 nm or more and 545 nm or less (for example, about 540 nm).

[projector]
FIG. 12 is a schematic diagram illustrating a configuration example of a projector according to an embodiment of the present technology.

  The projector 400 includes a light source device 100, an image generation unit 200 that generates an image using light emitted from the light source device 100, and a projection unit 300 that projects the image light generated by the image generation unit 200.

  The image generation unit 200 includes an integrator element 210, a polarization conversion element 215, a condenser lens 216, dichroic mirrors 220 and 222, mirrors 226, 227 and 228, and relay lenses 250 and 260. The image generation unit 200 includes a field lens 230 (230R, 230G, and 230B), liquid crystal light valves 240R, 240G, and 240B, and a dichroic prism 270.

  The integrator element 210 as a whole has a function of adjusting incident light irradiated from the light source device 100 to the liquid crystal light valves 240R, 240G, and 240B into a uniform luminance distribution. For example, the integrator element 210 includes a first fly-eye lens 211 having a plurality of microlenses (not shown) arranged two-dimensionally, and a plurality of microlenses arranged to correspond to each of the microlenses. A second fly-eye lens 212 having

  The parallel light incident on the integrator element 210 from the light source device 100 is divided into a plurality of light beams by the microlens of the first fly-eye lens 211 and is imaged on the corresponding microlens in the second fly-eye lens 212. . Each of the micro lenses of the second fly-eye lens 212 functions as a secondary light source, and irradiates the polarization conversion element 215 with incident light as a plurality of parallel lights.

  The polarization conversion element 215 has a function of aligning the polarization state of incident light incident through the integrator element 210 and the like. The polarization conversion element 215 emits outgoing light including blue light B3, green light G3, and red light R3 via, for example, a condenser lens 216 disposed on the outgoing side of the light source device 100.

  The dichroic mirrors 220 and 222 have a property of selectively reflecting color light in a predetermined wavelength range and transmitting light in other wavelength ranges. For example, the dichroic mirror 220 selectively reflects the red light R3. The dichroic mirror 222 selectively reflects the green light G3 out of the green light G3 and the blue light B3 transmitted through the dichroic mirror 220. The remaining blue light B3 passes through the dichroic mirror 222. Thereby, the light emitted from the light source device 100 is separated into a plurality of color lights of different colors.

  The separated red light R3 is reflected by the mirror 226, collimated by passing through the field lens 230R, and then enters the liquid crystal light valve 240R for red light modulation. The green light G3 is collimated by passing through the field lens 230G, and then enters the liquid crystal light valve 240G for green light modulation. The blue light B3 passes through the relay lens 250 and is reflected by the mirror 227, and further passes through the relay lens 260 and is reflected by the mirror 228. The blue light B3 reflected by the mirror 228 is collimated by passing through the field lens 230B, and then enters the liquid crystal light valve 240B for modulating blue light.

  The liquid crystal light valves 240R, 240G, and 240B are electrically connected to a signal source (not shown) (for example, a PC) that supplies an image signal including image information. The liquid crystal light valves 240R, 240G, and 240B modulate incident light for each pixel based on the supplied image signals of each color, and generate a red image, a green image, and a blue image, respectively. The modulated light of each color (formed image) enters the dichroic prism 270 and is synthesized. The dichroic prism 270 superimposes and synthesizes light of each color incident from three directions and emits the light toward the projection unit 300.

  The projection unit 300 includes a plurality of 310 and the like, and irradiates a screen (not shown) with light synthesized by the dichroic prism 270. Thereby, a full-color image is displayed.

  By appropriately setting the shape and the like of the light source device 100, it is possible to improve the design of the outer shape of the projector 400.

[Other Embodiments]
The present technology is not limited to the embodiments described above, and other various embodiments can be realized.

  In the above embodiment, the first wavelength range is 400 nm or more and 500 nm, but it may be a range larger or smaller than this range.

  In the above embodiment, the motor 52 rotates the transparent substrate 51. However, for example, the transparent substrate may vibrate. In this case, the shape of the transparent substrate is not limited to a disk shape, and an optimum shape can be selected.

  The projector according to the embodiment includes three liquid crystal light valves for RGB, but may include one color liquid crystal light valve.

  It is also possible to combine at least two feature portions among the feature portions of each embodiment described above.

The present technology can be configured as follows.
(1) a light source that emits excitation light in a first wavelength range;
Including a phosphor and a silicone-based binder, and when the excitation light is incident, transmits a part of the excitation light and emits light having a second wavelength range longer than the first wavelength range; A phosphor layer that combines the transmitted excitation light and the emitted light having the second wavelength range and emits the light;
A light source device comprising: a moving mechanism that moves the irradiation position of the excitation light to the phosphor layer with time.
(2) The light source device according to (1),
The phosphor layer has a thickness of 40 μm or more and 120 μm or less.
(3) The light source device according to (2),
The phosphor layer has a thickness of 60 μm or more and 80 μm or less.
(4) The light source device according to (2) or (3),
The phosphor is a YAG (Yttrium Aluminum Garnet) based material,
The average particle size of the phosphor particles is 10 μm or more and 30 μm or less.
(5) The light source device according to (4),
The average particle size of the phosphor particles is 15 μm or more and 20 μm or less.
(6) The light source device according to any one of (1) to (5),
The moving mechanism includes a support that supports the phosphor layer, and relatively moves the support and the light source.
(7) The light source device according to (6),
The moving mechanism includes a rotating plate as the support and a drive unit that drives the rotating plate.
(8) a light source that emits excitation light in a first wavelength range;
Including a phosphor and a silicone-based binder, and when the excitation light is incident, transmits a part of the excitation light and emits light having a second wavelength range longer than the first wavelength range; A phosphor layer that combines the transmitted excitation light and the emitted light having the second wavelength range and emits the light;
A light source device having a moving mechanism for moving the irradiation position of the excitation light to the phosphor layer with time;
An image generation unit that generates an image using light emitted from the light source device;
A projector comprising: a projection unit that projects an image generated by the image generation unit.

DESCRIPTION OF SYMBOLS 31 ... Laser light source 32 ... Light source unit 50 ... Fluorescence optical unit 51 ... Transparent substrate 52 ... Motor 53 ... Phosphor layer 58 ... Phosphor unit 100 ... Light source device 200 ... Image generation unit 300 ... Projection unit 400 ... Projector

Claims (7)

A light source that emits excitation light in a first wavelength range;
Including a phosphor and a silicone-based binder, and when the excitation light is incident, transmits a part of the excitation light and emits light having a second wavelength range longer than the first wavelength range; A phosphor layer that combines the transmitted excitation light and the emitted light having the second wavelength range and emits the light;
A light source device comprising: a moving mechanism that moves the irradiation position of the excitation light to the phosphor layer with time. The light source device according to claim 1,
The phosphor layer has a thickness of 40 μm or more and 120 μm or less. The light source device according to claim 2,
The phosphor is a YAG (Yttrium Aluminum Garnet) based material,
The average particle size of the phosphor particles is 10 μm or more and 30 μm or less. The light source device according to claim 3,
The average particle size of the phosphor particles is 15 μm or more and 20 μm or less. The light source device according to claim 1,
The moving mechanism includes a support that supports the phosphor layer, and relatively moves the support and the light source. The light source device according to claim 5,
The moving mechanism includes a rotating plate as the support and a drive unit that drives the rotating plate. A light source that emits excitation light in a first wavelength range;
Including a phosphor and a silicone-based binder, and when the excitation light is incident, transmits a part of the excitation light and emits light having a second wavelength range longer than the first wavelength range; A phosphor layer that combines the transmitted excitation light and the emitted light having the second wavelength range and emits the light;
A light source device having a moving mechanism for moving the irradiation position of the excitation light to the phosphor layer with time;
An image generation unit that generates an image using light emitted from the light source device;
A projector comprising: a projection unit that projects an image generated by the image generation unit.

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