WO2017169114A1 - 光源装置、画像表示装置、及び光学ユニット - Google Patents
光源装置、画像表示装置、及び光学ユニット Download PDFInfo
- Publication number
- WO2017169114A1 WO2017169114A1 PCT/JP2017/004062 JP2017004062W WO2017169114A1 WO 2017169114 A1 WO2017169114 A1 WO 2017169114A1 JP 2017004062 W JP2017004062 W JP 2017004062W WO 2017169114 A1 WO2017169114 A1 WO 2017169114A1
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- WO
- WIPO (PCT)
- Prior art keywords
- wheel
- light source
- source device
- light
- support surface
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/16—Cooling; Preventing overheating
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B33/00—Colour photography, other than mere exposure or projection of a colour film
- G03B33/10—Simultaneous recording or projection
- G03B33/12—Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors
Definitions
- the present technology relates to an image display device such as a projector, a light source device applicable to the image display device, and an optical unit.
- image display devices such as projectors have been widely used.
- a light modulation element such as a liquid crystal element
- the modulated light is projected onto a screen or the like to display an image.
- a mercury lamp, a xenon lamp, an LED (Light Emitting Diode), an LD (Laser Diode), or the like is used as the light source.
- solid-state light sources such as LEDs and LDs have the advantage that they have a long life and do not require conventional lamp replacement, and are turned on immediately upon being turned on.
- Patent Document 1 describes a light source device using a plurality of laser light sources and an image display device using the same.
- the blue laser light emitted from the light source unit is collected at a predetermined point on the phosphor provided on the phosphor wheel.
- the phosphor is excited by blue laser light to generate yellow fluorescence.
- the phosphor transmits a part of the blue laser light.
- white light in which blue laser light and yellow light are combined is emitted from the phosphor wheel (paragraphs [0035]-[0039], etc. of Patent Document 1).
- an object of the present technology is to provide a light source device, an image display device, and an optical unit that can maintain high reliability of a wheel.
- a light source device includes a wheel, a rotation drive unit, and a first adhesive material.
- the wheel has a light emitter that emits visible light upon excitation.
- the rotational drive unit has a support surface having a reference surface that contacts the wheel and a non-contact surface spaced from the wheel, and rotates the wheel supported by the support surface.
- the first adhesive material fills at least a portion between the non-contact surface and the wheel.
- the wheel is supported by a support surface having a reference surface and a non-contact surface. Further, the wheel and the support surface are connected by filling the adhesive material between the non-contact surface and the wheel. Thus, by providing the space filled with the adhesive material, the portion that contacts the wheel can be reduced. Thereby, for example, when thermal expansion or the like occurs, it is possible to suppress the stress acting on the wheel. As a result, the reliability of the wheel can be maintained high.
- the wheel may have a first surface supported by the support surface and a second surface opposite to the first surface.
- the rotation driving unit may include a rotation member that is disposed apart from the second surface.
- the light source device may further include a second adhesive material filled in at least a part between the rotating member and the second surface. In this optical device, a gap is provided on both sides of the wheel, which is filled with adhesive material. This makes it possible to hold the wheel with high accuracy and with a good balance.
- the wheel may have a base portion that supports the light emitter.
- the support surface may support the base portion. This makes it possible to sufficiently suppress the stress that acts on the base portion.
- the wheel may have a heat radiating portion connected to the base portion.
- the support surface may support the heat dissipation part.
- the rotation driving unit may include a motor having the support surface. By forming the support surface on the motor, the reliability of the wheel can be easily improved.
- the rotating member may be a rotor hub connected to the motor. By disposing the rotor hub away from the second surface, the rotating member can be easily realized.
- the rotational drive unit may include a motor that generates a rotational force, and a transmission member that has the support surface and transmits the rotational force of the motor to the wheel. By connecting the transmission member on which the support surface is formed to the motor, the rotation drive unit can be easily configured.
- the transmission member may be a rotor hub having the support surface and connected to the motor. By forming the support surface on the rotor hub, the number of parts can be reduced.
- the motor may include a rotor that serves as the rotating member.
- the reference surface may be a surface to which the adhesive material is not applied. Thereby, the mounting accuracy of the wheel can be improved.
- the support surface may include a main surface including the non-contact surface and one or more convex portions each formed on the main surface and having the reference surface.
- the adhesive material may be filled in at least a part between a region excluding a predetermined convex region including the periphery of the convex portion and the wheel. This can sufficiently prevent the adhesive material from being applied to the reference surface.
- the area of the reference surface may be smaller than the area of the non-contact surface.
- An image display device includes a light source device, an image generation system, and a projection system.
- the light source device includes the wheel, the rotation driving unit, the first adhesive material, and an emission surface that emits light including visible light from the light emitter.
- the image generation system includes an image generation element that generates an image based on irradiated light, and an illumination optical system that irradiates the image generation element with light from the light source device.
- the projection system projects an image generated by the image generation element.
- An optical unit includes the wheel, the rotation driving unit, and the first adhesive material.
- FIG. 1 It is a schematic diagram showing an example of composition of an image display device concerning one embodiment of this art. It is a figure which shows typically the structural example of the light source device shown in FIG. It is a perspective view which shows the specific structural example of a fluorescent substance unit. It is the schematic which shows the specific structural example of a wheel part. It is a perspective view which shows the specific structural example of a wheel part. It is a perspective view which shows the structural example of the support surface formed in the rotor of a motor. It is sectional drawing in the AA line of FIG.4 and FIG.5A. It is a figure for demonstrating the filling example of the 1st and 2nd adhesive material. It is the schematic which shows the other structural example of the convex part formed in a support surface.
- FIG. 1 is a schematic diagram illustrating a configuration example of an image display device according to an embodiment of the present technology.
- the image display device 500 is used as a projector for presentation or digital cinema, for example.
- the present technology described below can also be applied to image display devices used for other purposes.
- the image display device 500 is generated by the light source device 100 that can emit white light W, the image generation system 200 that generates an image based on the white light W emitted from the light source device 100, and the image generation system 200.
- a projection system 400 that projects an image onto a screen or the like (not shown).
- the image generation system 200 includes an image generation element 210 that generates an image based on the irradiated light, and an illumination optical system 220 that irradiates the image generation element 210 with light emitted from the light source device 100.
- the image generation system 200 includes an integrator element 230, a polarization conversion element 240, and a condenser lens 250.
- the integrator element 230 includes a first fly-eye lens 231 having a plurality of microlenses arranged two-dimensionally, and a second having a plurality of microlenses arranged to correspond to each of the microlenses.
- the fly eye lens 232 is included.
- the white light W incident on the integrator element 230 from the light source device 100 is divided into a plurality of light beams by the microlens of the first fly-eye lens 231 and imaged on the corresponding microlens in the second fly-eye lens 232, respectively.
- the Each of the micro lenses of the second fly-eye lens 232 functions as a secondary light source, and irradiates the polarization conversion element 240 with incident light as a plurality of parallel lights with uniform brightness.
- the integrator element 230 as a whole has a function of adjusting incident light irradiated from the light source device 100 to the polarization conversion element 240 into a uniform luminance distribution.
- the polarization conversion element 240 has a function of aligning the polarization state of incident light incident through the integrator element 230 and the like.
- White light including blue light B3, green light G3, and red light R3 is emitted from the polarization conversion element 240 via the condenser lens 250 and the like.
- the illumination optical system 220 includes dichroic mirrors 260 and 270, mirrors 280, 290 and 300, relay lenses 310 and 320, field lenses 330R, 330G and 330B, liquid crystal light valves 210R, 210G and 210B as image generating elements, and a dichroic prism. 340 is included.
- the dichroic mirrors 260 and 270 have a property of selectively reflecting color light in a predetermined wavelength range and transmitting light in other wavelength ranges.
- a dichroic mirror 260 selectively reflects green light G3 and blue light B3.
- the dichroic mirror 270 selectively reflects the green light G3 out of the green light G3 and the blue light B3 reflected by the dichroic mirror 260.
- the remaining blue light B3 passes through the dichroic mirror 270.
- the light emitted from the light source device 100 is separated into a plurality of color lights of different colors. Note that the configuration for separating the light into a plurality of color lights and the device used are not limited.
- the separated red light R3 is reflected by the mirror 280, is collimated by passing through the field lens 330R, and then enters the liquid crystal light valve 210R for modulating red light.
- the green light G3 is collimated by passing through the field lens 330G, and then enters the liquid crystal light valve 210G for green light modulation.
- the blue light B3 is reflected by the mirror 290 through the relay lens 310, and further reflected by the mirror 300 through the relay lens 320.
- the blue light B3 reflected by the mirror 300 is collimated by passing through the field lens 330B, and then enters the liquid crystal light valve 210B for modulating blue light.
- the liquid crystal light valves 210R, 210G, and 210B are electrically connected to a signal source (not shown) such as a PC that supplies an image signal including image information.
- the liquid crystal light valves 210R, 210G, and 210B 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 340 and is synthesized.
- the dichroic prism 340 superimposes and synthesizes light of each color incident from three directions and emits the light toward the projection system 400.
- Projection system 400 projects an image generated by image generation element 210.
- the projection system 400 includes a plurality of lenses 410 and the like, and irradiates a screen or the like (not shown) with light synthesized by the dichroic prism 340. As a result, a full color image is displayed.
- FIG. 2 is a diagram schematically illustrating a configuration example of the light source device 100.
- the light source device 100 includes a light source unit 10, a condensing optical system 15, and a phosphor unit 20.
- the light source unit 10 has a plurality of laser light sources (LD).
- LD laser light sources
- a blue laser light source that can oscillate blue laser light B1 having a peak wavelength of emission intensity within a wavelength range of 400 nm to 500 nm is used.
- another solid light source such as an LED may be used.
- the present technology can be applied even when a mercury lamp, a xenon lamp, or the like is used instead of the solid light source.
- the condensing optical system 15 condenses the blue laser light B1 emitted from the light source unit 10 on a predetermined point of the phosphor unit 20.
- the structure of the condensing optical system 15 is not limited, For example, an aspherical reflective surface, a plane reflective surface, etc. are used suitably.
- the light source unit 10 and the condensing optical system 15 may be held as one unit by a predetermined frame or the like.
- the phosphor unit 20 includes a phosphor wheel 21 and a motor 22.
- the phosphor wheel 21 has a disk-shaped substrate 23 that transmits the blue laser light B ⁇ b> 1 and a phosphor layer 24 provided on the substrate 23.
- a crystalline member such as quartz or sapphire is used.
- the phosphor layer 24 contains a fluorescent material that emits fluorescence when excited by the blue laser light B1.
- the phosphor layer 24 converts part of the blue laser light B1 emitted from the light source unit 10 into light in a wavelength range including the red wavelength range to the green wavelength range (that is, yellow light). Further, the phosphor layer 24 transmits a part of the blue laser light B1 emitted from the light source unit 10 as it is. Therefore, the phosphor layer 24 emits light including blue excitation light and yellow fluorescence.
- the fluorescent substance contained in the phosphor layer 24 for example, a YAG (yttrium, aluminum, garnet) phosphor is used.
- the kind of fluorescent substance, the wavelength range of the excited light, and the wavelength range of the visible light generated by excitation are not limited.
- the motor 22 is connected to the center of the substrate 23.
- the phosphor wheel 21 rotates about the rotation axis S.
- Blue laser light B1 is emitted from the light source unit 10 while the substrate 23 is rotated by the motor 22.
- the blue laser light B ⁇ b> 1 is applied to the phosphor layer 24 so as to draw a circle relatively with the rotation of the substrate 23.
- white light W including blue laser light B2 that has passed through the phosphor layer 24 and green light G2 and red light R2 that are visible light from the phosphor layer 24 is emitted.
- the phosphor unit 20 corresponds to the optical unit according to the present embodiment.
- the phosphor layer 24 corresponds to a light emitter, and the substrate 23 corresponds to a base portion.
- the motor 22 functions as a rotation drive unit that rotates the phosphor wheel 21.
- FIG. 3 is a perspective view illustrating a specific configuration example of the phosphor unit 20.
- FIG. 3B is a view of the phosphor unit 20 shown in FIG. 3A as viewed from below.
- the phosphor unit 20 includes a wheel unit 30, a lens unit 31, and a holding member 32 that holds the wheel unit 30 and the lens unit 31 as one unit.
- the wheel unit 30 includes a phosphor wheel 21, a motor 22, and a rotor hub 25.
- a heat radiating plate 28 is provided on the second surface 21 b on the rear side of the phosphor wheel 21.
- the heat sink 28 is connected to the substrate 23.
- the rotor hub 25 is disposed in the center of the second surface 21b so as to face the heat radiating plate 28.
- a phosphor layer 24 is formed along the periphery of the substrate 23 on the first surface 21a on the front side of the phosphor wheel 21 (see FIG. 5B).
- a motor 22 is connected to the center of the first surface 21a. Details of the wheel unit 30 will be described later.
- the lens unit 31 includes a lens housing unit 33, a lens group (not shown), and an emission surface (not shown).
- the lens group is housed in the lens casing 33 and collects white light emitted from the phosphor wheel 21.
- the exit surface emits the collected white light along the optical axis L.
- the specific configuration of the lens unit 31 is not limited and may be arbitrarily designed.
- the holding member 32 holds the motor 22 and the lens housing portion 33.
- the holding method is not limited, and any method such as fitting, adhesion, screw / screw fastening, or the like may be used. Further, the holding member 32 and the lens housing portion 33 may be configured integrally.
- the blue laser light B1 emitted from the light source unit 10 passes through the substrate 23 from the second surface 21b of the phosphor wheel 21 and is condensed on a predetermined point of the phosphor layer 24.
- White light is emitted from the phosphor wheel 21 to the lens unit 31.
- the lens unit 31 emits white light W along the optical axis L.
- the phosphor unit 20 is configured as one unit in this way, it is possible to easily achieve the alignment between the lens unit 31 and the wheel unit 30 with high accuracy.
- the heat generated from the phosphor layer 24 can be effectively cooled by cooling air or the like.
- FIG. 4 and 5 are schematic views showing a specific configuration example of the wheel unit 30.
- FIG. FIG. 5A is a perspective view showing the rear side of the wheel unit 30, and
- FIG. 5B is a perspective view showing the front side of the wheel unit 30.
- FIG. 6 is a perspective view illustrating a configuration example of a support surface formed on the rotor of the motor 22.
- FIG. 7 is a cross-sectional view taken along line AA in FIGS. 4 and 5A. 7 corresponds to a cross-sectional view taken along a line passing through the convex portion 58 on the support surface 50 shown in FIG. 6 (for example, a cross-sectional view taken along the line B).
- the motor 22 is an outer rotor type motor, and includes a stator (stator) 26 and a rotor (rotor) 27 provided so as to cover the stator 26.
- the stator 26 includes a base portion 40 attached to the holding member 32 and a coil mechanism 41 supported by the base portion 40.
- a flexible substrate 42 is connected to the coil mechanism 41, and power is supplied through the flexible substrate 42.
- the rotor 27 has a yoke part 43, a tip part 44, and a shaft part 45.
- the yoke portion 43 is a portion that covers the coil mechanism 41, and a permanent magnet 46 is provided at a position facing the coil mechanism 41.
- the distal end portion 44 is connected to the yoke portion 43 and has a support surface 50 that supports the phosphor wheel 21.
- the shaft portion 45 is rotatably provided on the base portion 40 of the stator 26 and connected to the tip portion 44.
- the yoke part 43, the tip part 44, and the shaft part 45 rotate integrally. Thereby, a rotational force is generated.
- the rotor hub 25 is connected to the rotor 27 of the motor 22 and rotates integrally with the rotor 27.
- the rotor hub 25 functions as a rotating member in this embodiment.
- the phosphor wheel 21 includes a substrate 23 having a through hole 23 a formed in the center, a heat dissipation plate 28 formed on the rear surface 23 b of the substrate 23, and a front surface 23 c of the substrate 23. And a phosphor layer 24 formed on the substrate.
- the heat sink 28 is slightly smaller than the substrate 23, and a through hole 28a is formed at the center. The positions of the through holes 23a and 28a are aligned, and the substrate 23 and the heat sink 28 are connected.
- the heat radiating plate 28 corresponds to a heat radiating portion, and a metal material having high thermal conductivity such as copper or aluminum is used. The heat generated from the phosphor layer 24 by the heat radiating plate 28 can be diffused over a wide range.
- the phosphor layer 24 is formed on the front surface 23 c of the substrate 23.
- the phosphor layer 24 is formed along the periphery in a region outside the region on the back side of the heat dissipation plate 28.
- the surface of the radiator plate 28 and the rear surface 23 b of the substrate 23 outside thereof serve as the second surface 21 b of the phosphor wheel 21.
- the front surface 23 c of the substrate 23 that becomes the first surface 21 a of the phosphor wheel 21 is supported by the support surface 50 of the rotor 27.
- the rotor hub 25 is connected to the tip end portion 44 of the rotor 27 via the through holes 23 a and 28 a of the substrate 23 and the heat dissipation plate 28. Therefore, the rotor hub 25 is disposed on the surface side of the heat radiating plate 28 serving as the second surface 21 b of the phosphor wheel 21.
- the distal end portion 44 has a support surface 50 that supports the phosphor wheel 21 and an attachment portion 51 to which the rotor hub 25 is attached.
- the support surface 50 has a ring shape, and a region inside the support surface 50 serves as a mounting portion 51.
- the mounting portion 51 has three ribs 53 formed at the boundary with the support surface 50, three screw holes 54, and a central protrusion 55.
- the three holes 53 are in contact with the through holes 23 a of the substrate 23.
- the rotor hub 25 is attached so that the central protrusion 55 is inserted into the attachment hole 29 at the center of the rotor hub 25.
- the screw hole 39 of the rotor hub 25 and the screw hole 54 of the mounting portion 51 are aligned, and the screw 5 is attached, whereby the rotor hub 25 is connected to the rotor 27.
- the support surface 50 has a main surface 57 and three convex portions 58 formed on the main surface 57.
- Each convex portion 58 has a substantially circular planar shape when viewed from the Z direction.
- the three convex portions 58 are formed along the circumferential direction of the support surface 50 so as to be arranged at equal intervals at substantially equal angles.
- three convex portions 58 are respectively formed on the outer sides of the screw holes 54 formed in the attachment portion 51.
- the shape, size, position, number, and the like of the protrusions 58 are not limited and may be arbitrarily designed.
- the surface of the convex portion 58 is planar, and functions as the reference surface 59 according to the present embodiment.
- the front surface 23 c of the substrate 23 of the phosphor wheel 21 contacts the reference surface 59.
- the heights of the convex portions 58 from the main surface 57 are aligned, and are set in the range of 0.1 mm to 1 mm, for example. Of course, it is not limited to this range.
- the region where the convex portion 58 of the main surface 57 is not formed becomes a non-contact surface 60 that is separated from the phosphor wheel 21. Therefore, when the phosphor wheel 21 is supported by the support surface 50, a clearance C ⁇ b> 1 is formed between the non-contact surface 60 and the substrate 23.
- the rotor hub 25 has a concave portion 62 in which the attachment hole 29 is formed, and a flange portion 63 that extends outward from the concave portion 62.
- the flange portion 63 and the heat dissipation plate 28 face each other.
- the mounting position of the rotor hub 25 or the depth of the recess 62 is appropriately designed so that the flange 63 is separated from the surface of the heat dissipation plate 28. Therefore, a clearance C ⁇ b> 2 is formed between the heat radiating plate 28 and the flange portion 63.
- the size of the clearance C2 is not limited, and is configured in the range of 0.1 mm to 1 mm, for example.
- At least part of the clearance C1 between the non-contact surface 60 and the substrate 23 is filled with the first adhesive material. Further, the second adhesive material is filled in at least a part of the clearance C2 between the heat dissipation plate 28 and the flange portion 63.
- first and second adhesive materials adhesives are typically used, and specific materials and the like may be set as appropriate.
- FIG. 8 is a diagram for explaining a filling example of the first and second adhesive materials.
- the first adhesive 65 is applied to a predetermined position in the non-contact surface 60 by potting or the like.
- the phosphor wheel 21 is attached so as to come into contact with the reference surface 59 of the convex portion 58.
- a part of the clearance C1 is filled with the first adhesive 65, and the rotor 27 of the motor 22 and the phosphor wheel 21 are sufficiently connected.
- no adhesive material is applied to the reference surface 59, and the reference surface 59 and the substrate 23 are in direct contact with each other.
- the second adhesive 66 is placed at a predetermined position in the region 63R facing the flange 63 of the rotor hub 25 on the heat sink 28. Is applied by potting or the like.
- the rotor hub 25 is attached to the attachment portion 51 of the rotor 27 through the through hole 23 a of the phosphor wheel 21. As a result, a part of the clearance C2 is filled with the second adhesive 66, and the rotor 27 and the rotor hub 25 are sufficiently connected.
- the second adhesive 66 may be applied to the lower surface of the flange portion 63 of the rotor hub 25 and attached to the attachment portion 51 of the rotor 27.
- clearances C1 and C2 are formed on both the first surface 21a and the second surface 21b of the phosphor wheel 21.
- the clearances C1 and C2 are filled with the first and second adhesives 65 and 66, and the phosphor wheel 21 is held with both surfaces sandwiched.
- the size, position, number, etc. of the areas where the first and second adhesives 65 and 66 are applied are not limited, and may be arbitrarily designed.
- the first and second adhesives 65 and 66 may be applied to all regions of the non-contact surface 60 and all regions 63R facing the flange portion 63, respectively.
- the phosphor wheel 21 can be firmly attached, and the reliability is improved.
- the hand and the application area are selectively set, the adhesive application process can be simplified and the material cost can be reduced. It may be appropriately set for each user so that desired reliability is exhibited.
- the phosphor wheel 21 is supported by the support surface 50 having the reference surface 59 and the non-contact surface 60. Moreover, the phosphor wheel 21 and the support surface 50 are connected by filling the clearance C1 between the non-contact surface 60 and the phosphor wheel 21 with the first adhesive 65.
- the surface position of the phosphor wheel 21 can be accurately determined, and variations in the mounting position of the phosphor wheel 21 can be sufficiently suppressed. Further, eccentricity and surface blurring of the phosphor wheel 21 can be sufficiently suppressed. Since the first adhesive 65 is not applied to the reference surface 59, the surface position can be secured with very high accuracy. As a result, the white light W can be efficiently generated, and high brightness can be achieved.
- the clearance C1 as a space filled with the first adhesive 65, a sufficient connection between the phosphor wheel 21 and the rotor 27 is realized, and a portion where both the members are in direct contact with each other is reduced. It becomes possible. Thereby, in the case where thermal expansion occurs due to heat generated from the phosphor layer 24 or the like, the stress acting on the substrate 23 or the like of the phosphor wheel 21 can be sufficiently suppressed. In addition, the stress acting on the phosphor wheel 21 can be dispersed through the first adhesive 65. This is not limited to the occurrence of thermal expansion, and even when a minute deformation or the like occurs in the substrate 23 or the rotor 27 for other reasons, the influence can be sufficiently suppressed. As a result, the reliability of the phosphor wheel 21 can be kept high.
- the clearance C2 is also formed on the front side of the phosphor wheel 21, and the second adhesive 66 is filled. This makes it possible to sufficiently suppress the stress acting on the phosphor wheel 21 when thermal expansion or the like occurs while sufficiently connecting the heat sink 28 and the rotor hub 25. In addition, since the phosphor wheel 21 is held so as to sandwich both surfaces, the phosphor wheel 21 can be held with high accuracy and a good balance.
- a phosphor wheel used in a projector or the like has been fastened by a method in which a holding member is brought into contact with both sides, a method in which one side of a phosphor wheel is bonded, or a method in which these are used in combination.
- the holding member and the phosphor wheel are firmly connected by screws or the like in order to maintain the mounting accuracy.
- stress concentrates on the contact portion between the holding member and the phosphor wheel, and there is a possibility that damage such as large deformation of the wheel or wheel cracking may occur.
- the bonding surface to which the adhesive material is applied becomes a reference for the surface position, it is easily affected by variations in bonding, and accurate mounting is difficult.
- the reference surface 59 and the phosphor wheel 21 are brought into contact with each other in order to ensure the surface position of the phosphor wheel 21.
- the initial position accuracy can be easily obtained, and high mounting accuracy can be exhibited.
- a region other than the reference surface 59 becomes a non-contact surface 60, and the formed clearance is filled with an adhesive material.
- FIGS. 9 and 10 are schematic views showing another configuration example of the convex portion 58 formed on the support surface 50.
- four circular convex portions 58a may be formed on the support surface 50 so as to be arranged at an interval of approximately 90 degrees.
- the eight rectangular protrusions 58b may be formed so as to be arranged at an interval of approximately 45 degrees.
- a plurality of convex portions may be formed radially from the center of the attachment portion 51.
- a ring-shaped convex portion 58c may be formed at a substantially central position in the width direction of the support surface 50 (shaded portion).
- the some ring-shaped convex part 58d may be formed so that it may become concentric.
- the mounting accuracy of the phosphor wheel 21 can be improved by increasing the reference surface 59.
- the stress acting on the phosphor wheel 21 can be reduced.
- the area of the reference surface 59 is designed to be smaller than the area of the non-contact surface 60. Thereby, high reliability can be exhibited.
- the present invention is not limited to this, and it may be appropriately set for each user so that the phosphor wheel 21 can exhibit desired characteristics.
- FIG. 11 is a partially enlarged view showing another configuration example of the wheel unit.
- the phosphor wheel 21 is supported on the support surface 50 so that the heat radiating plate 28 contacts the reference surface 59 of the convex portion 58. That is, the front and back of the phosphor wheel 21 are reversed.
- the surface of the heat radiating plate 28 becomes the first surface of the phosphor wheel 21.
- the surface of the substrate 23 becomes the second surface of the phosphor wheel 21.
- the heat transmitted to the substrate 23 can be diffused through the rotor 27, and a heat dissipation effect can be obtained.
- the heat dissipation plate 28 By bringing the heat dissipation plate 28 into contact, the heat dissipation effect can be enhanced.
- heat sinks 28 may be formed on both sides of the substrate 23. This can further improve the heat diffusion effect.
- a support surface 150 having one or more convex portions 158 is formed on the flange portion 163 of the rotor hub 125.
- the reference surface 159 and the non-contact surface 160 are formed on the flange portion 163.
- the surface of the heat radiating plate 28 facing the flange portion 163 of the phosphor wheel 21 is the first surface and is in contact with the reference surface 159.
- a first adhesive material is filled between the heat dissipation plate 28 and the non-contact surface 160.
- the rotor hub 125 is attached to the rotor 127 with the phosphor wheel 21 bonded to the rotor hub 125. Of course, it is not limited to this.
- the surface of the substrate 23 serving as the second surface of the phosphor wheel 21 is separated from the rotor 127.
- a space between the substrate 23 and the rotor 127 is filled with the second adhesive material.
- the phosphor wheel 21 is sufficiently held from both sides.
- the support surface 150 may be formed on the front surface side of the phosphor wheel 21.
- the rotor hub 125 functions as a transmission member that transmits the rotational force of the motor 122 to the phosphor wheel 21.
- the rotor 27 functions as a rotating member.
- a transmission member may be disposed on the side where the motor is disposed with respect to the phosphor wheel. That is, the motor rotor, the transmission member, and the phosphor wheel may be arranged in this order.
- a rotating member such as a rotor hub is connected to the rotor or the transmission member. This makes it possible to hold the phosphor wheel from both sides.
- a general motor can be used. In addition, the design of the rotation drive unit is facilitated.
- the parts different from the motor and the rotor hub may be used as the transmission member and the rotating member according to the present technology.
- the support surface on the rotor or the rotor hub the number of parts can be suppressed, and the part cost can be reduced.
- this technique is applicable with respect to arbitrary motors, such as an inner rotor type motor.
- FIG. 12 is a diagram for explaining a setting example of a region to which the first adhesive material is applied.
- An application prohibition region based on the convex portion 58 may be set so that the first adhesive material is not applied to the reference surface 59.
- a convex region 70 including the convex portion 58 and the periphery of the convex portion 58 is set as the application prohibited region.
- the first adhesive material is filled in at least a portion between the region excluding the convex region 70 and the phosphor wheel. Thereby, it is possible to sufficiently prevent the first adhesive material from adhering to the reference surface 59.
- the shape and size of the convex region 70 may be set arbitrarily.
- One or more recesses may be formed on the support surface.
- a region other than the recess becomes the reference surface, and the surface in the recess becomes the non-contact surface.
- the non-contact surface may be a curved surface shape. The shape of the non-contact surface is not limited as long as a clearance for filling the adhesive material is formed.
- this technique can also take the following structures.
- a rotation drive unit that has a support surface having a reference surface that contacts the wheel and a non-contact surface spaced from the wheel, and that rotates the wheel supported by the support surface;
- a light source device comprising: a first adhesive material filled in at least a part between the non-contact surface and the wheel.
- the wheel has a first surface supported by the support surface and a second surface opposite to the first surface;
- the rotation drive unit includes a rotation member disposed away from the second surface,
- the light source device further includes a second adhesive material filled in at least a part between the rotating member and the second surface.
- the wheel has a base portion that supports the light emitter, The support surface is an optical device that supports the base portion.
- the wheel has a heat dissipation portion connected to the base portion, The said support surface is an optical apparatus which supports the said thermal radiation part.
- the rotation drive unit includes a motor having the support surface.
- the rotational drive unit includes a motor having the support surface, The rotating member is a rotor hub connected to the motor.
- the light source device has a motor which produces
- the transmission member is a rotor hub having the support surface and connected to the motor.
- the light source device is a rotor hub having the support surface and connected to the motor;
- the motor includes a rotor that serves as the rotating member.
- the reference surface is a surface to which the adhesive material is not applied.
- the light source device according to any one of (1) to (10),
- the support surface includes a main surface including the non-contact surface, and one or more convex portions each formed on the main surface and having the reference surface.
- the light source device according to (11),
- the adhesive material is filled in at least a part between a region excluding a predetermined convex region including the periphery of the convex portion and the wheel.
- the area of the reference surface is smaller than the area of the non-contact surface.
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- Spectroscopy & Molecular Physics (AREA)
- Multimedia (AREA)
- Astronomy & Astrophysics (AREA)
- Projection Apparatus (AREA)
- Mounting And Adjusting Of Optical Elements (AREA)
- Transforming Electric Information Into Light Information (AREA)
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Abstract
Description
前記ホイールは、励起により可視光を発する発光体を有する。
前記回転駆動部は、前記ホイールに接触する基準面と前記ホイールから離間した非接触面とを有する支持面を有し、前記支持面に支持された前記ホイールを回転させる。
前記第1の接着材料は、前記非接触面と前記ホイールとの間の少なくとも一部に充填される。
この光学装置では、ホイールの両方の面に間隙が設けられ、そこに接着材料が充填される。これによりホイールを高い精度でバランスよく保持することが可能となる。
これにより基体部に作用する応力を十分に抑制することが可能となる。
これにより放熱部を伝達する熱を、回転駆動部を介して拡散することが可能となり、ホイールを効果的に冷却することが可能となる。
モータに支持面を形成することで、ホイールの信頼性を容易に向上させることができる。
ロータハブを第2の面に離間して配置することで、容易に回転部材を実現することができる。
支持面が形成された伝達部材をモータに接続することで、回転駆動部を容易に構成させることが可能となる。
ロータハブに支持面を形成することで、部品の数を抑えることができる。
モータのロータを第2の面から離間して配置し、間に接着材料を充填することで、ホイールを高い精度でバランスよく保持することが可能となる。
これによりホイールの取付精度を向上させることができる。
ホイールの主面に凸部を形成することで、簡単に基準面及び非接触面を実現することができる。また基準面及び非接触面の位置や大きさ等の設計等も容易となる。
これにより基準面に接着材料が塗布されてしまうことを十分に防止することができる。
これによりホイールに作用する応力を十分に抑制することが可能となり、ホイールの信頼性を向上させることが可能となる。
前記光源装置は、前記ホイールと、前記回転駆動部と、前記第1の接着材料と、前記発光体からの可視光を含む光を出射する出射面とを有する。
前記画像生成システムは、照射された光をもとに画像を生成する画像生成素子と、前記画像生成素子に前記光源装置からの光を照射する照明光学系とを有する。
前記投射システムは、前記画像生成素子により生成された画像を投射する。
図1は、本技術の一実施形態に係る画像表示装置の構成例を示す概略図である。画像表示装置500は、例えばプレゼンテーション用、もしくはデジタルシネマ用のプロジェクタとして用いられる。その他の用途に用いられる画像表示装置にも、以下に説明する本技術は適用可能である。
図2は、光源装置100の構成例を模式的に示す図である。光源装置100は、光源ユニット10、集光光学系15、及び蛍光体ユニット20を有する。
図3は、蛍光体ユニット20の具体的な構成例を示す斜視図である。図3Bは、図3Aに示す蛍光体ユニット20を下方から見た図である。蛍光体ユニット20は、ホイール部30と、レンズ部31と、ホイール部30及びレンズ部31を1つのユニットとして保持する保持部材32とを有する。
本技術は、以上説明した実施形態に限定されず、他の種々の実施形態を実現することができる。
(1)励起により可視光を発する発光体を有するホイールと、
前記ホイールに接触する基準面と前記ホイールから離間した非接触面とを有する支持面を有し、前記支持面に支持された前記ホイールを回転させる回転駆動部と、
前記非接触面と前記ホイールとの間の少なくとも一部に充填される第1の接着材料と
を具備する光源装置。
(2)(1)に記載の光源装置であって、
前記ホイールは、前記支持面に支持される第1の面と前記第1の面の反対側の第2の面とを有し、
前記回転駆動部は、前記第2の面から離間して配置された回転部材を有し、
前記光源装置は、さらに、前記回転部材と前記第2の面との間の少なくとも一部に充填される第2の接着材料を具備する
光学装置。
(3)(1)又は(2)に記載の光源装置であって、
前記ホイールは、前記発光体を支持する基体部を有し、
前記支持面は、前記基体部を支持する
光学装置。
(4)(1)又は(2)に記載の光源装置であって、
前記ホイールは、前記基体部に接続された放熱部を有し、
前記支持面は、前記放熱部を支持する
光学装置。
(5)(1)から(4)のうちいずれか1つに記載の光源装置であって、
前記回転駆動部は、前記支持面を有するモータを含む
光学装置。
(6)(2)に記載の光源装置であって、
前記回転駆動部は、前記支持面を有するモータを含み、
前記回転部材は、前記モータに接続されたロータハブである
光学装置。
(7)(1)から(4)のうちいずれか1つに記載の光源装置であって、
前記回転駆動部は、回転力を生成するモータと、前記支持面を有し前記モータの回転力を前記ホイールに伝達する伝達部材とを有する
光学装置。
(8)(7)に記載の光源装置であって、
前記伝達部材は、前記支持面を有し前記モータに接続されたロータハブである
光学装置。
(9)(2)に記載の光源装置であって、
前記伝達部材は、前記支持面を有し前記モータに接続されたロータハブであり、
前記モータは、前記回転部材となるロータを有する
光学装置。
(10)(1)から(9)のうちいずれか1つに記載の光源装置であって、
前記基準面は、前記接着材料が塗布されない面である
光源装置。
(11)(1)から(10)のうちいずれか1つに記載の光源装置であって、
前記支持面は、前記非接触面を含む主面と、前記主面に形成され各々が前記基準面を有する1以上の凸部とを有する
光源装置。
(12)(11)に記載の光源装置であって、
前記接着材料は、前記凸部の周囲を含む所定の凸部領域を除く領域と前記ホイールとの間の少なくとも一部に充填される
光源装置。
(13)(1)から(12)のうちいずれか1つに記載の光源装置であって、
前記基準面の面積は、前記非接触面の面積よりも小さい
光源装置。
20…蛍光体ユニット
21…蛍光体ホイール
21a…第1の面
21b…第2の面
22、122…モータ
23…基板
24…蛍光体層
25、125…ロータハブ
26…ステータ
27、127…ロータ
28…放熱板
30、130、140…ホイール部
50、150…支持面
57…主面
58、58a~58d、158…凸部
59、159…基準面
60、160…非接触面
65…第1の接着剤
66…第2の接着剤
70…凸部領域
100…光源装置
200…画像生成システム
400…投射システム
500…画像表示装置
Claims (15)
- 励起により可視光を発する発光体を有するホイールと、
前記ホイールに接触する基準面と前記ホイールから離間した非接触面とを有する支持面を有し、前記支持面に支持された前記ホイールを回転させる回転駆動部と、
前記非接触面と前記ホイールとの間の少なくとも一部に充填される第1の接着材料と
を具備する光源装置。 - 請求項1に記載の光源装置であって、
前記ホイールは、前記支持面に支持される第1の面と前記第1の面の反対側の第2の面とを有し、
前記回転駆動部は、前記第2の面から離間して配置された回転部材を有し、
前記光源装置は、さらに、前記回転部材と前記第2の面との間の少なくとも一部に充填される第2の接着材料を具備する
光学装置。 - 請求項1に記載の光源装置であって、
前記ホイールは、前記発光体を支持する基体部を有し、
前記支持面は、前記基体部を支持する
光学装置。 - 請求項1に記載の光源装置であって、
前記ホイールは、前記基体部に接続された放熱部を有し、
前記支持面は、前記放熱部を支持する
光学装置。 - 請求項1に記載の光源装置であって、
前記回転駆動部は、前記支持面を有するモータを含む
光学装置。 - 請求項2に記載の光源装置であって、
前記回転駆動部は、前記支持面を有するモータを含み、
前記回転部材は、前記モータに接続されたロータハブである
光学装置。 - 請求項1に記載の光源装置であって、
前記回転駆動部は、回転力を生成するモータと、前記支持面を有し前記モータの回転力を前記ホイールに伝達する伝達部材とを有する
光学装置。 - 請求項7に記載の光源装置であって、
前記伝達部材は、前記支持面を有し前記モータに接続されたロータハブである
光学装置。 - 請求項2に記載の光源装置であって、
前記伝達部材は、前記支持面を有し前記モータに接続されたロータハブであり、
前記モータは、前記回転部材となるロータを有する
光学装置。 - 請求項1に記載の光源装置であって、
前記基準面は、前記接着材料が塗布されない面である
光源装置。 - 請求項1に記載の光源装置であって、
前記支持面は、前記非接触面を含む主面と、前記主面に形成され各々が前記基準面を有する1以上の凸部とを有する
光源装置。 - 請求項11に記載の光源装置であって、
前記接着材料は、前前記凸部の周囲を含む所定の凸部領域を除く領域と前記ホイールとの間の少なくとも一部に充填される
光源装置。 - 請求項1に記載の光源装置であって、
前記基準面の面積は、前記非接触面の面積よりも小さい
光源装置。 - (a)励起により可視光を発する発光体を有するホイールと、
前記ホイールに接触する基準面と前記ホイールから離間した非接触面とを有する支持面を有し、前記支持面に支持された前記ホイールを回転させる回転駆動部と、
前記非接触面と前記ホイールとの間の少なくとも一部に充填される第1の接着材料と
前記発光体からの可視光を含む光を出射する出射面と
を有する光源装置と、
(b)照射された光をもとに画像を生成する画像生成素子と、前記画像生成素子に前記光源装置からの光を照射する照明光学系とを有する画像生成システムと、
(c)前記画像生成素子により生成された画像を投射する投射システムと
を具備する画像表示装置。 - 励起により可視光を発する発光体を有するホイールと、
前記ホイールに接触する基準面と前記ホイールから離間した非接触面とを有する支持面を有し、前記支持面に支持された前記ホイールを回転させる回転駆動部と、
前記非接触面と前記ホイールとの間の少なくとも一部に充填される第1の接着材料と
を具備する光学ユニット。
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US16/078,711 US10976649B2 (en) | 2016-03-31 | 2017-02-03 | Light source apparatus, image display apparatus, and optical unit |
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CN109073962B (zh) | 2021-10-01 |
US10976649B2 (en) | 2021-04-13 |
EP3438742A4 (en) | 2019-02-06 |
TWI753883B (zh) | 2022-02-01 |
US20190056645A1 (en) | 2019-02-21 |
TW201737509A (zh) | 2017-10-16 |
CN109073962A (zh) | 2018-12-21 |
JPWO2017169114A1 (ja) | 2019-02-14 |
JP6988792B2 (ja) | 2022-01-05 |
EP3438742A1 (en) | 2019-02-06 |
JP7127723B2 (ja) | 2022-08-30 |
JP2021192102A (ja) | 2021-12-16 |
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