WO2012133485A1 - Dispositif de source de lumière - Google Patents

Dispositif de source de lumière Download PDF

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Publication number
WO2012133485A1
WO2012133485A1 PCT/JP2012/058060 JP2012058060W WO2012133485A1 WO 2012133485 A1 WO2012133485 A1 WO 2012133485A1 JP 2012058060 W JP2012058060 W JP 2012058060W WO 2012133485 A1 WO2012133485 A1 WO 2012133485A1
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WO
WIPO (PCT)
Prior art keywords
light
film
phosphor film
primary
secondary light
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Application number
PCT/JP2012/058060
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English (en)
Japanese (ja)
Inventor
小林　建
達弥 向山
Original Assignee
株式会社Ｊｖｃケンウッド
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Publication of WO2012133485A1 publication Critical patent/WO2012133485A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/507—Wavelength conversion elements the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

Definitions

  • the present invention relates to a light source device used as a light source for a projection display device (projector) or the like.
  • discharge lamps such as ultra-high pressure mercury lamps, xenon lamps, and halogen lamps are often used as light sources for projectors.
  • a semiconductor light source has been proposed for reasons such as low power consumption, instantaneous lighting, long life, high color purity and mercury-free.
  • LEDs light emitting diodes
  • LEDs As a light source for projectors, it has been used only as a light source for some low-intensity projectors. The reason is that since the LED is a surface emitting light source, it is necessary to increase both the input power and the area in order to increase the luminance. In other words, with the amount of light flux per unit area, the actual situation is that sufficient brightness to replace a conventional discharge lamp as a light source for a projector cannot be obtained.
  • An object of the present invention is to provide a light source device that can increase the amount of light flux per unit area of a light emitting unit and output the light flux with high efficiency.
  • the incident surface (11) disposed with a gap from the first phosphor film (3, 3a), the inclined surface (12) inclined to face the incident surface (11), and the incident surface (11)
  • a light source device including a first secondary light reflection film (4, 4a) that is disposed and transmits primary light and reflects secondary light.
  • a metal film mirror (7) installed with a gap in a portion where the incident surface (11) and the first phosphor film (3) do not face each other may be further provided.
  • the length of the incident surface (11) and the first secondary light reflecting film (in the direction from the narrow surface (14) facing the emission surface (13) toward the emission surface (13)
  • the length (D1 + D2) of 4) is longer than the length (D1) of the first phosphor film (3), and the first phosphor film (3) has a narrow surface (14) of the incident surface (11). ) May be arranged to face a part of the side.
  • a second secondary light reflecting film (5) that transmits primary light and reflects secondary light, which is disposed with a gap on the inclined surface (12), may be provided.
  • a second phosphor film (3b) that is disposed on the inclined surface (12) with a gap, absorbs primary light, and emits secondary light, and a second phosphor film (3b) are provided.
  • a second solid-state light emitting element (4b) that emits primary light for illumination, the second phosphor film (3b), and the second solid-state light emitting element (4b), and transmits the primary light.
  • a second secondary light reflecting film (4b) that reflects secondary light may be further provided.
  • 1 aspect of this invention WHEREIN: It is arrange
  • the light pipe (8) may have a tapered shape so as to spread from the first solid state light emitting device (2) side toward the first phosphor film (3) side. .
  • a primary light reflecting film (6) that is disposed on the exit surface (13) and reflects primary light and transmits secondary light may be further provided.
  • the first solid-state light emitting element (31b) may emit primary light having a single wavelength, and the spectral characteristics of the first secondary light reflecting film (4a) may be a narrow band. .
  • the present invention it is possible to provide a light source device capable of increasing the amount of light flux per unit area of the light emitting portion and outputting the light flux with high efficiency.
  • first to third embodiments exemplify apparatuses and methods for embodying the technical idea of the present invention
  • the technical idea of the present invention is the component parts.
  • the material, shape, structure, arrangement, etc. are not specified below.
  • the technical idea of the present invention can be variously modified within the scope of the claims.
  • the light source device includes a solid-state light emitting element 2 that emits primary light (primary light source light), and absorbs primary light to secondary light (secondary light source).
  • a phosphor film 3 that emits light
  • a wedge-shaped prism 1 that is disposed via the phosphor film 3 and air
  • a solid light-emitting element 2 that is disposed via the phosphor film 3 and air
  • a solid light-emitting element 2 and the phosphor film 3.
  • a first secondary light reflection film 4 that transmits the primary light emitted by the fluorescent film 3 and reflects the secondary light emitted by the phosphor film 3.
  • the material of the prism glass or resin having a refractive index larger than 1 can be used.
  • Each surface of the prism 1 is a polished surface with a small surface roughness.
  • the prism 1 can be manufactured by molding, in addition to polishing and cutting.
  • the prism 1 faces a surface (hereinafter referred to as “incident surface”) 11 disposed along the phosphor film 3 via air and is inclined to the incident surface 11.
  • a surface 12 hereinafter referred to as an “inclined surface”
  • two surfaces hereinafter referred to as “vertical surfaces”) 15 and 16 that are perpendicular to the incident surface 11 and the inclined surface 12 and are opposed to each other in parallel, and an incident surface.
  • solid-state light-emitting element 2 shown in FIG. 1 various light-emitting elements such as LEDs and semiconductor lasers can be used.
  • a reflective film is formed on the back surface side of the solid state light emitting device 2, and primary light emitted from the light emitting layer is reflected directly or by the reflective film and emitted to the front surface side.
  • the solid light emitting element 2 has a rectangular shape of, for example, about 2 mm ⁇ 6 mm when viewed from above.
  • a blue LED is used as the solid state light emitting device 2.
  • the solid state light emitting device 2 is supported by a support member 21 having a reflective surface that reflects primary light.
  • the phosphor film 3 is formed by coating on a substrate 23 such as glass so as to face a part of the incident surface 11 on the narrow angle surface 14 side.
  • the shape of the phosphor film 3 in a top view is substantially the same as that of the solid light emitting element 2, and the area of the phosphor film 3 is equal to the area of the solid light emitting element 2.
  • various phosphors such as sulfide, oxide or nitride can be employed.
  • the phosphor film 3 behaves as a secondary light source, absorbs primary light emitted by the solid state light emitting device 2 as excitation light, and emits secondary light having a wavelength different from that of the primary light.
  • the phosphor film 3 when the primary light is blue light, the phosphor film 3 emits ultraviolet to visible light such as green or red.
  • the length (D1 + D2) of the substrate 23 In the direction parallel to the incident surface 11 from the sandwiched surface 14 to the exit surface 13, the length (D1 + D2) of the substrate 23 is longer than the length D1 of the phosphor film 3, and the length of the incident surface 11 is the substrate. It is longer than the length of 23 (D1 + D2).
  • the first secondary light reflecting film 4 is disposed on the surface of the substrate 23 opposite to the surface on which the phosphor film 3 is disposed so as to have substantially the same area as the phosphor film 3.
  • the first secondary light reflecting film 4 for example, a dichroic film in which thin films made of silicon oxide (SiO2) and titanium oxide (TiO2) having different refractive indexes are alternately stacked can be used.
  • the first secondary light reflecting film 4 can be formed on the substrate 23 by vapor deposition or the like.
  • a metal film mirror 7 such as a silver mirror that reflects all visible light with high reflectivity (for example, 98% or more) is disposed in a portion where the first secondary light reflection film 4 on the substrate 23 is not disposed.
  • the metal film mirror 7 is disposed so as to face a portion of the incident surface 11 that is not opposed to the phosphor film 3 on the exit surface 13 side via air.
  • the second secondary light reflecting film 5 is disposed along the inclined surface 12 via air.
  • the second secondary light reflecting film 5 is disposed on a substrate 24 such as glass.
  • the length D3 of the second secondary light reflecting film 5 and the substrate 24 is substantially the same as the length (D1 + D2) of the substrate 23 in the direction parallel to the inclined surface 12 from the sandwiched surface 14 to the exit surface 13. .
  • the second secondary light reflecting film 5 transmits the primary light and reflects the secondary light.
  • a dichroic film in which thin films made of silicon oxide (SiO 2 ) and titanium oxide (TiO 2 ) having different refractive indexes are alternately stacked can be used.
  • the second secondary light reflecting film 5 can be formed on the substrate 24 by vapor deposition or the like.
  • the primary light reflecting film 6 is disposed on the emission surface 13.
  • the primary light reflecting film 6 reflects the primary light and transmits the secondary light.
  • a dichroic film in which thin films made of silicon oxide (SiO 2 ) and titanium oxide (TiO 2 ) having different refractive indexes are alternately stacked can be used.
  • the primary light reflection film 6 can be formed on the emission surface 13 by vapor deposition or the like.
  • a quadrangular prism tube (light pipe) 8 is disposed so as to surround between the solid light emitting element 2 and the phosphor film 3.
  • the light pipe 8 has an inner wall surface formed of a mirror that reflects primary light and secondary light.
  • a cover member 22 is disposed outside the light pipe 8 so as to surround the light pipe 8.
  • the primary light is indicated by a dotted arrow
  • the secondary light is indicated by a solid arrow.
  • the primary light (blue light) emitted from the solid state light emitting device 2 passes through the first secondary light reflecting film 4 and the substrate 23 through the light pipe 8 and illuminates the phosphor film 3.
  • the phosphor film 3 absorbs primary light as excitation light and emits secondary light (green light).
  • each phosphor particle in the phosphor film 3 individually absorbs the primary light and emits the secondary light in all directions (360 degrees). Therefore, about half of the primary light is emitted to the prism 1 side.
  • the remaining light is emitted to the opposite side, but is reflected by the first secondary light reflecting film 4 and all the secondary light is directed to the prism 1 side. Further, a part of the primary light is transmitted through the phosphor film 3 without being absorbed by the phosphor film 3.
  • the secondary light emitted from the phosphor film 3 and a part of the primary light transmitted through the phosphor film 3 enter the incident surface 11 of the prism 1 through the air, Multiple reflection at. Since each surface of the prism 1 is mirror-polished, from the prism 1 having a high refractive index to the outside of the low system, all light rays exceeding the angle satisfying Snell's law are internally reflected within the prism 1 exceeding the critical angle. Wake up. Accordingly, all the primary light and secondary light incident from the phosphor film 3 are internally reflected on the two vertical surfaces 15 and 16 and the included angle surface 14.
  • the incident surface 11 and the inclined surface 12 some rays do not exceed the critical angle when entering the prism 1, so that they exit the prism 1 system.
  • the emitted light beam is reflected by the first secondary light reflection film 4, the second secondary light reflection film 5, and the metal film mirror 7 and returned to the prism 1 again.
  • the prism 1 Since the prism 1 has a wedge shape so as to spread toward the exit surface 13 side, light rays that do not exceed the critical angle exceed the critical angle by being subjected to multiple reflection and are internally reflected.
  • the incident surface 11, the exit surface 12, and the two of the prism 1 with respect to the length D 1 of the phosphor film 3 shown in FIG. 1 so that the light beam output from the phosphor film 3 repeats multiple reflections exceeding the critical angle.
  • the vertical surfaces 15 and 16 are lengthened, and the length D2 of the metal film mirror 7 and the length D3 of the second secondary light reflecting film 5 are appropriately lengthened. In this way, light is emitted out of the system with high efficiency from the exit surface 13 by repeating multiple reflections in the prism 1.
  • the secondary light reflecting film 4 can reflect the secondary light with high probability.
  • the area of the phosphor film 3 that emits the secondary light is larger than the area of the emission surface 13 that emits the secondary light. Therefore, etendue can be improved and illumination can be performed with high brightness. Then, the phosphor film 3 emits secondary light with the primary light from the solid state light emitting device 2, and the secondary light is reflected by the first secondary light reflecting film 4, whereby the incident surface 11 and the inclined surfaces 12 are aligned with each other. Thus, the secondary light repeats multiple reflections, and the secondary light can be efficiently output from the exit surface 13. Therefore, the amount of light flux per unit area can be increased, and the light flux can be output with high efficiency.
  • FIG. 7 shows a simulation result of the relationship between the area of the phosphor film 3 and the brightness.
  • the light source device according to the first embodiment of the present invention may be nearly twice as bright as the emitted configuration.
  • increasing the area of the phosphor film 3 has the effect, and since it exceeds the limit that would not have been achieved even if the LED was increased in size, higher brightness can be expected.
  • the secondary light reflected from the inclined surface 12 is returned into the prism 1 by arranging the second secondary light reflecting film 5. Can do.
  • the primary light and the secondary light have spectral characteristics as shown in FIG.
  • the primary light is partially mixed in the light beam incident on the prism 1 from the phosphor film 3.
  • This relates to the luminous efficiency of the phosphor film 3 and is a component that is transmitted as it is without being absorbed by the phosphor film 3. If this component is mixed in the emitted light, a desired spectrum cannot be obtained and the pure color is deteriorated.
  • the first secondary light reflection film 4, the second secondary light reflection film 5, and the primary light reflection film 6 have high reflection of 98% or more in each band. Therefore, by arranging the second secondary light reflecting film 5, the blue light component of the light rays not exceeding the critical angle can be transmitted outside the system through the second secondary light reflecting film 5. .
  • the primary light reflecting film 6 is arranged on the emission surface 13 so that the primary light transmitted without being absorbed by the phosphor film 3 is emitted. It can be returned to the prism 1 without being output from the surface 13.
  • the primary light excites the phosphor film 3 again to emit light, so that the secondary light can be further amplified and the amount of light flux per unit area can be increased.
  • the solid light emitting element 2 and the prism 1 are spaced apart from each other due to physical factors such as an electrode disposed on the surface of the solid light emitting element 2 and a wire bonding loop for supplying power to the electrode. According to the light source device according to the first embodiment of the present invention, it is possible to prevent leakage of light flux from the gap between the solid light emitting element 2 and the prism 1 by having the light pipe 8.
  • the first secondary light reflection film 4 may be disposed between the substrate 23 and the phosphor film 3. Further, the first secondary light reflecting film 4 may cover the entire surface of the substrate 23. The length (D1 + D2) of the first secondary light reflecting film 4 is longer than the length D1 of the phosphor film 3.
  • the secondary light emitted from the phosphor film 3 toward the substrate 23 is reflected by the first secondary light reflecting film 4 immediately below. , All secondary light travels toward the prism 1 side. The secondary light emitted from the prism 1 through the incident surface 11 is reflected by the first secondary light reflecting film 4 and returned to the prism 1.
  • the light source device is arranged on the incident surface 11 side of the prism 1 along the incident surface 11 via air, absorbs primary light, and A first phosphor film 3a emitting secondary light, a first solid-state light emitting element 2a emitting primary light for illuminating the first phosphor film 3a, the first phosphor film 3a and the first phosphor film 3a.
  • the first secondary light reflecting film 4a is disposed between the first and second solid state light emitting devices 2a and transmits primary light and reflects secondary light.
  • the first solid state light emitting device 2a is supported by a support member 21a.
  • a light pipe 8a and a cover member 22a are disposed between the first solid state light emitting device 2a and the first phosphor film 3a.
  • the first phosphor film 3a and the first secondary light reflecting film 4a are disposed on the substrate 23a.
  • a metal film mirror 7a such as a silver mirror that reflects all visible light with high reflectivity (for example, 98% or more) is disposed in a portion of the substrate 23a where the first phosphor film 3a is not disposed.
  • the light source device is disposed on the inclined surface 12 side of the prism 1 via air along the inclined surface 12, and absorbs primary light and emits secondary light.
  • a second secondary light reflecting film 4b that transmits the primary light and reflects the secondary light.
  • the second solid state light emitting device 2b is supported by a support member 21b.
  • a light pipe 8b and a cover member 22b are disposed between the second solid state light emitting device 2b and the second phosphor film 3b.
  • the second phosphor film 3b and the second secondary light reflecting film 4b are disposed on the substrate 23b.
  • a metal film mirror 7b such as a silver mirror that reflects all visible light with high reflectivity (for example, 98% or more) is disposed in a portion of the substrate 23b where the second phosphor film 3b is not disposed.
  • the primary light emitted from the first solid state light emitting element 2a is transmitted through the first secondary light reflecting film 4a and the substrate 23a through the light pipe 8a to illuminate the first phosphor film 3a.
  • the first phosphor film 3a absorbs the primary light and emits secondary light.
  • the primary light emitted from the second solid state light emitting element 2b passes through the second secondary light reflecting film 4b and the substrate 23b through the light pipe 8b, and illuminates the second phosphor film 3b.
  • the second phosphor film 3b absorbs the primary light and emits secondary light.
  • the secondary light from each of the first phosphor film 3a and the second phosphor film 3b is the secondary light reflected by the first secondary light reflection film 4a and the second secondary light reflection film 4b, and Along with the afterglow component of the primary light, it enters the prism 1 through the air, and the first secondary light reflecting film 4a, the second secondary light reflecting film 4b, the metal film mirror 7a, in the prism 1 and in the vicinity of the prism 1, Multiple reflection is repeated at 7 b and output from the exit surface 13.
  • the first phosphor film 3a and the second phosphor film 3b exhibit an absorption characteristic with respect to the primary light, but do not have an absorption characteristic with respect to the secondary light.
  • the phosphor film 3a and the second phosphor film 3b are respectively transmitted or partially scattered, reflected by the first secondary light reflecting film 4a and the second secondary light reflecting film 4b, and again the first phosphor.
  • the light passes through the film 3 a and the second phosphor film 3 b and reenters the prism 1.
  • the film 3b absorbs and contributes to the emission of secondary light.
  • the primary light is reflected by the primary light reflecting film 6 on the exit surface 13 and returned to the system again. Since the primary light has a completely closed system, multiple reflection is repeated again, and the light is incident again on the first phosphor film 3a and the second phosphor film 3b and contributes to light emission.
  • the primary light transmitted again through the first phosphor film 3a and the second phosphor film 3b is transmitted through the first secondary light reflection film 4a and the second secondary light reflection film 4b and the substrates 23a and 23b. Then, the light returns to the first solid state light emitting device 2a and the second solid state light emitting device 2b via the light pipes 8a and 8b.
  • This light beam is reflected by the first solid-state light-emitting element 2a and the second solid-state light-emitting element 2b itself, and illuminates the first phosphor film 3a and the second phosphor film 3b again.
  • all the primary light including the residual component is absorbed by the first phosphor film 3a and the second phosphor film 3b and contributes to the emission of the secondary light.
  • the amount of light flux per unit area is large and illumination can be performed with high efficiency. It becomes.
  • the light source device As shown in FIG. 13, the light source device according to the third embodiment of the present invention has a tapered shape so that the light pipe 8 spreads from the solid light emitting element 2 side toward the phosphor film 3 side. Different from the first embodiment of the present invention. The areas of the phosphor film 3 and the first secondary light reflection film 4 are larger than the area of the solid state light emitting device 2. Other configurations are substantially the same as those of the first embodiment of the present invention, and a duplicate description is omitted.
  • the primary light emitted from the solid state light emitting device 2 has an angle ⁇ 0 with respect to the normal direction of the surface of the solid state light emitting device 2, and the light exit surface 13 while being reflected multiple times within the light pipe 8. Head to. At this time, since the reflecting surface in the light pipe 8 is inclined, the angles ⁇ 0, ⁇ 1, and ⁇ 2 toward the phosphor film 3 are reduced every time the primary light is reflected. Accordingly, any primary light emitted from the light pipe 8 becomes substantially parallel light. The primary light emitted from the light pipe 8 passes through the substrate 23, passes through the first secondary light reflecting film 4, and illuminates the phosphor film 3.
  • the spectral reflection characteristic shifts to the short wavelength side. Therefore, even if it is primary light, a component having a large light beam angle cannot be transmitted, and a phenomenon in which the phosphor film 3 cannot be sufficiently illuminated with primary light may occur, and a desired high brightness may not be obtained.
  • the primary light can be made substantially parallel light. The phosphor film 3 can be illuminated with high efficiency without being reflected by the angle characteristic of 4.
  • the illuminated phosphor film 3 absorbs primary light and emits secondary light (green light). At that time, each phosphor particle inside the phosphor film 3 individually absorbs blue light and emits green light in all directions (360 degrees). Therefore, about half of the primary light is emitted to the prism 1 side, while the remaining light is emitted to the opposite substrate 23 side. This time, a light beam with a considerable angle is incident on the first secondary light reflection film 4, but the reflection band of the secondary light is widened by the angle characteristics of the first secondary light reflection film 4, so that almost all Light can be reflected and directed to the prism 1 side. Then, as shown in FIG.
  • the secondary light emitted from the phosphor film 3 is subjected to multiple reflection by the prism 1, the first secondary light reflecting film 4, the second secondary reflecting film 5, and the metal film mirror 7. Is repeated and ejected from the exit surface 13.
  • the light pipe 8 since the light pipe 8 has a tapered shape, it becomes easier to return the light beam incident on the light pipe 8 to the prism 1 as compared with the case where the diameter of the light pipe 8 is constant.
  • the phosphor film 3 can be illuminated with high efficiency, and the phosphor film 3 emits light.
  • the phosphor film 3 emits light.
  • the primary light that has been multiple-reflected in the prism 1 and returned to the phosphor film 3 is incident at a predetermined incident angle or more, the light is again transmitted without passing through the first secondary light reflecting film 4. It can be returned to the phosphor film 3. Therefore, the phosphor film 3 can be illuminated with primary light with high efficiency.
  • each of the light pipes 8a and 8b includes the first solid-state light emitting element 2a and the first
  • the second solid-state light emitting element 2b may have a tapered shape toward the first phosphor film 3a and the second phosphor film 3b.
  • Other configurations are substantially the same as those of the light source device according to the second embodiment of the present invention shown in FIG.
  • lasers 31a and 31b that output a single wavelength may be used instead of LEDs.
  • the lasers 31a and 31b are arranged outside the system.
  • FIG. 18 shows a laser array in which a plurality of lasers 31a and 31b are used, the number of lasers 31a and 31b may be one and the number is not particularly limited.
  • the lasers 31a and 31b emit a blue laser having a single wavelength as shown in FIG. Light rays output from the lasers 31a and 31b are emitted radially, and are collimated by collimating lenses 32a and 32b.
  • the plurality of parallel lights are incident on the end faces of the light pipes 8a and 8b through the common condenser lenses 33a and 33b.
  • the light rays that are multiply reflected in the light pipes 8a and 8b illuminate the first phosphor film 3a and the second phosphor film 3b as substantially parallel light, respectively.
  • the other configuration is substantially the same as the configuration shown in FIG.
  • the phosphor film 3 is used as the first secondary light reflecting film 4a and the second secondary light reflecting film 4b.
  • a reflective film with a narrow band that transmits the substantially parallel light that illuminates and reflects the return light that returns by multiple reflection within the prism 1
  • the primary light is confined in the system, and all the primary light is reflected. Light can be contributed to light emission in the phosphor film 3.
  • a metal film mirror such as a silver mirror that reflects all visible light with high reflectivity (for example, 98% or more) may be provided.
  • the metal film mirror By arranging the metal film mirror, the primary light transmitted without being absorbed by the phosphor film 3 is returned into the prism 1, and the phosphor film 3 is excited again to emit light, thereby further amplifying the secondary light.
  • the amount of light flux per unit area can be increased.
  • the wedge-shaped prism 1 has been described.
  • a metal film mirror that reflects primary light and secondary light or a secondary light reflecting film that reflects secondary light is formed on the inner wall surface of the housing 1x.
  • the prism 1 according to the first to third embodiments of the present invention may have a configuration in which the incident surface 11 and the inclined surface 12 are significantly larger than the exit surface 13. Further, the phosphor film 3 may have a significantly larger area than the exit surface 13 of the prism 1.
  • the present invention is also applicable to a wedge shape in which the prism 1 has no included angle surface 14 and the incident surface 11 and the inclined surface 12 are continuous.
  • the vertical surfaces 15 and 16 are preferably perpendicular to the incident surface 11 and the inclined surface 12 and parallel to each other, but may not be strictly vertical and parallel.
  • the exit surface 13 and the included angle surface 14 are preferably parallel to each other, but may not be strictly parallel.
  • the case where blue light is emitted as the primary light and green light is emitted as the secondary light has been described. It is also possible to emit red light having a wavelength band as shown in FIG. Furthermore, a desired spectrum in the visible light region may be emitted using ultraviolet light having a short wavelength (high energy) as excitation light. In that case, as the secondary light reflecting films 4, 5, 4a, and 4b, films that reflect and transmit the spectrum of each band can be appropriately selected.
  • the light source device forms a spatial light modulation element that modulates secondary light emitted from the light source device and an image of the modulated secondary light.
  • the present invention is also applicable to an image display apparatus having an imaging optical system that displays on a screen or the like.
  • This light source device can be used as a light source for a projector.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Multimedia (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
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Abstract

La présente invention se rapporte à un dispositif de source de lumière qui comprend : un premier élément électroluminescent à semi-conducteurs (2) destiné à émettre une lumière primaire ; un premier film luminescent (3) destiné à absorber la lumière primaire et à émettre une lumière secondaire ; un prisme (1) qui présente une surface d'incidence (11) disposée le long du premier film luminescent (2), de l'air étant intercalé entre ces derniers, une surface inclinée (12) qui est orientée vers la surface d'incidence (11) selon un angle, deux surfaces verticales qui sont orientées vers la surface d'incidence (11) et la surface inclinée (12) de manière verticale et mutuellement parallèle, une surface d'émission (13) continue avec la surface d'incidence (11), la surface inclinée (12) et les deux surfaces verticales au niveau d'un côté où l'espace entre la surface d'incidence (11) et la surface inclinée (12) est important, l'aire surfacique de la surface d'émission étant inférieure à l'aire surfacique du premier film luminescent (3), et une surface à angle fermé (14) selon un agencement mutuellement parallèle avec la surface d'émission (13) ; et un premier film réfléchissant la lumière secondaire (4) pour permettre à la lumière primaire de passer à travers ce dernier tout en réfléchissant la lumière secondaire, le premier film réfléchissant la lumière secondaire étant disposé entre le premier élément électroluminescent à semi-conducteurs (2) et le premier film luminescent (3).
PCT/JP2012/058060 2011-03-29 2012-03-28 Dispositif de source de lumière WO2012133485A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011072053A JP2012209036A (ja) 2011-03-29 2011-03-29 光源装置
JP2011-072053 2011-03-29

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CN106569380A (zh) * 2015-10-08 2017-04-19 台达电子工业股份有限公司 光线供应装置和投影系统
CN106814528A (zh) * 2015-11-27 2017-06-09 中强光电股份有限公司 投影装置及其照明系统
CN107062001A (zh) * 2016-12-22 2017-08-18 毅丰显示科技（深圳）有限公司 发光二极管阵列光源
US10423055B2 (en) 2015-02-20 2019-09-24 Ricoh Company, Ltd. Illumination device and image projection apparatus
JP2022121549A (ja) * 2018-05-28 2022-08-19 ピアソン キャピタル エンバイロメンタル （ベイジン） リミテッド 植物材料の有機酸前処理から生成物を回収するための効率的な方法および組成物

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JP5812520B2 (ja) * 2013-03-28 2015-11-17 ウシオ電機株式会社 蛍光光源装置
CN104570563B (zh) * 2015-01-06 2016-08-24 深圳雅图数字视频技术有限公司 投影机、投影机壳体及其卡扣结构
JP7283327B2 (ja) * 2019-09-20 2023-05-30 セイコーエプソン株式会社 波長変換素子、光源装置及びプロジェクター
JP7491330B2 (ja) 2022-02-25 2024-05-28 セイコーエプソン株式会社 光源装置およびプロジェクター

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US10423055B2 (en) 2015-02-20 2019-09-24 Ricoh Company, Ltd. Illumination device and image projection apparatus
CN106569380A (zh) * 2015-10-08 2017-04-19 台达电子工业股份有限公司 光线供应装置和投影系统
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CN105487331A (zh) * 2016-01-14 2016-04-13 张建平 一种用于投影系统的光源组件
CN105487331B (zh) * 2016-01-14 2017-12-08 张建平 一种用于投影系统的光源组件
CN107062001A (zh) * 2016-12-22 2017-08-18 毅丰显示科技（深圳）有限公司 发光二极管阵列光源
CN107062001B (zh) * 2016-12-22 2023-04-07 毅丰显示科技（深圳）有限公司 发光二极管阵列光源
JP2022121549A (ja) * 2018-05-28 2022-08-19 ピアソン キャピタル エンバイロメンタル （ベイジン） リミテッド 植物材料の有機酸前処理から生成物を回収するための効率的な方法および組成物
JP7401601B2 (ja) 2018-05-28 2023-12-19 ピアソン キャピタル エンバイロメンタル （ベイジン） リミテッド 植物材料の有機酸前処理から生成物を回収するための効率的な方法および組成物

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