US20020114158A1 - Illuminating apparatus using multiple light sources - Google Patents

Illuminating apparatus using multiple light sources Download PDF

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Publication number
US20020114158A1
US20020114158A1 US09/789,970 US78997001A US2002114158A1 US 20020114158 A1 US20020114158 A1 US 20020114158A1 US 78997001 A US78997001 A US 78997001A US 2002114158 A1 US2002114158 A1 US 2002114158A1
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Prior art keywords
reflector
opening
illuminating apparatus
reflecting surface
light rays
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US09/789,970
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US6425677B1 (en
Inventor
Fu-Ming Chuang
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Digimedia Tech Co Ltd
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Prokia Tech Co Ltd
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Assigned to PROKIA TECHNOLOGY CO., LTD. reassignment PROKIA TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHUANG, FU-MING
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/0025—Combination of two or more reflectors for a single 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
    • G03B21/2013—Plural light sources
    • 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
    • G03B21/2066—Reflectors in illumination beam
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor
    • H04N5/7416—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal
    • H04N5/7441—Projection arrangements for image reproduction, e.g. using eidophor involving the use of a spatial light modulator, e.g. a light valve, controlled by a video signal the modulator being an array of liquid crystal cells

Definitions

  • the invention relates to an illuminating apparatus for a liquid crystal projection display, more particularly to an illuminating apparatus that utilizes a plurality of light sources to generate input light for a projection display.
  • a conventional liquid crystal projection display input light is separated into color components that are modulated and subsequently recombined to generate an image output.
  • a single light source is commonly used to generate the input light in the conventional projection display.
  • the single light source will incur a corresponding increase in power requirement.
  • High-power single light sources are disadvantageous in that there is a severe heat dissipation problem that is difficult to resolve when such light sources are in use.
  • the object of the present invention is to provide an illuminating apparatus that utilizes a plurality of light sources to generate bright input light for a projection display.
  • an illuminating apparatus comprises:
  • a lighting unit including a plurality of lighting members that are spaced apart from each other and that are operable so as to produce forwardly directed parallel light rays;
  • a first reflector disposed in front of the lighting unit and having a central region formed with an opening, and a peripheral region around the central region and formed with a first reflecting surface that confronts the lighting unit and that reflects the forwardly directed parallel light rays from the lighting members to converge rearwardly;
  • a second reflector disposed behind the first reflector and registered with the central region of the first reflector, the second reflector being formed with a second reflecting surface that faces the opening in the first reflector such that the light rays reflected from the first reflecting surface are further reflected by the second reflecting surface so as to pass through the opening in the first reflector;
  • an integrator disposed in front of the first reflector and having an incident end disposed proximate to the opening in the first reflector to receive the light rays that pass through the opening, and a radiating end disposed opposite to the incident end.
  • FIG. 1 is a partly sectional schematic side view of the first preferred embodiment of an illuminating apparatus according to the present invention
  • FIG. 2 is a schematic rear end view of the first preferred embodiment
  • FIG. 3 is a partly sectional schematic side view of the second preferred embodiment of an illuminating apparatus according to the present invention.
  • the first preferred embodiment of an illuminating apparatus is shown to comprise a lighting unit 1 , a first reflector 2 , a second reflector 3 , and an integrator 4 .
  • the lighting unit 1 includes a plurality of lighting members 11 that are arranged in a ring formation and that are angularly spaced apart from each other.
  • Each lighting member 11 includes a light source 111 and a parabolic reflector 112 for reflecting light rays that radiate from the light source 111 to produce forwardly directed parallel light rays.
  • the first reflector 2 is disposed in front of the lighting unit 1 , and has a central region formed with an opening 21 , and a peripheral region around the central region and aligned with the lighting members 11 .
  • the peripheral region is formed with a curved first reflecting surface 22 , such as a convex reflecting surface, that confronts the lighting unit 1 and that reflects the forwardly directed parallel lightrays from the lighting members 11 to converge rearwardly.
  • the second reflector 3 is disposed behind the first reflector 2 and is registered with the central region of the first reflector 2 .
  • the second reflector 3 is formed with a curved second reflecting surface 31 , such as a convex reflecting surface, that faces the opening 21 in the first reflector 2 such that the light rays reflected from the first reflecting surface 22 are further reflected by the second reflecting surface 31 so as to pass through the opening 21 .
  • the second reflecting surface 31 cooperates with the first reflecting surface 22 such that the light rays passing through the opening 21 converge at a point 32 that is in front of the first reflector 2 .
  • the second reflector 3 has a size sufficient so as not to block passage of the forwardly directed parallel light rays from the lighting members 11 to the peripheral region of the first reflector 2 .
  • the integrator 4 is disposed in front of the first reflector 2 , and has an incident end 41 disposed proximate to the opening 21 in the first reflector 2 to receive the light rays that pass through the opening 21 , and a radiating end 42 opposite to the incident end 41 .
  • the integrator 4 which has the incident and radiating ends 41 , 42 thereof aligned with the opening 21 in the first reflector 2 about an optical axis, may be formed as a glass cylinder, or as a hollow cylinder having an inner wall surface coated with a reflective film.
  • the point 32 where the light rays passing through the opening 21 converge, coincides with the incident end 41 of the integrator 4 .
  • Input light for a liquid crystal projection display (not shown) can be obtained from the radiating end 42 .
  • the second preferred embodiment of an illuminating apparatus is shown to comprise a lighting unit 51 , a first reflector 52 , a second reflector 53 , and an integrator 54 .
  • the lighting unit 51 is similar to the lighting unit 1 of the previous embodiment, and includes a plurality of lighting members 511 .
  • the first reflector 52 is disposed in front of the lighting unit 51 , and has a central region formed with an opening 521 , and a peripheral region around the central region and formed with a curved first reflecting surface 522 that confronts the lighting unit 51 and that reflects forwardly directed parallel light rays from the lighting members 511 to converge rearwardly.
  • the second reflector 53 is disposed behind the first reflector 52 and is registered with the central region of the first reflector 52 .
  • the second reflector 53 is formed with a curved second reflecting surface 531 that faces the opening 521 in the first reflector 52 such that the light rays reflected from the first reflecting surface 522 are further reflected by the second reflecting surface 531 so as to pass through the opening 521 in the first reflector 52 .
  • the second reflecting surface 531 cooperates with the first reflecting surface 522 such that the light rays reflected by the second reflecting surface 531 are parallel to each other as they pass through the opening 521 in the first reflector 52 .
  • the integrator 54 is disposed in front of the first reflector 52 , and has an incident end 541 disposed proximate to the opening 521 in the first reflector 52 to receive the light rays that pass through the opening 521 , and a radiating end 542 opposite to the incident end 541 .
  • the integrator 54 which has the incident and radiating ends 541 , 542 thereof aligned with the opening 521 in the first reflector 52 about an optical axis, includes front and rear array-type integration lenses 544 , 543 that are spaced apart from each other along the optical axis and that are formed respectively with the radiating and incident ends 542 , 541 .
  • Input light for a liquid crystal projection display (not shown) can be obtained from the radiating end 542 .
  • a filter 55 is disposed in front of the integrator 54 to remove ultraviolet and infrared light rays.
  • a focusing lens 56 can be additionally disposed in front of the filter 55 .

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection Apparatus (AREA)

Abstract

An illuminating apparatus includes a lighting unit, first and second reflectors, and an integrator. The lighting unit includes a plurality of lighting members that are spaced apart from each other and that are operable so as to produce forwardly directed parallel light rays. The first reflector is disposed in front of the lighting unit, and has a central region formed with an opening, and a peripheral region around the central region and formed with a first reflecting surface that confronts the lighting unit and that reflects the forwardly directed parallel light rays from the lighting members to converge rearwardly. The second reflector is disposed behind the first reflector and is registered with the central region of the first reflector. The second reflector is formed with a second reflecting surface that faces the opening such that the light rays reflected from the first reflecting surface are further reflected by the second reflecting surface so as to pass through the opening. The integrator is disposed in front of the first reflector and has an incident end disposed proximate to the opening to receive the light rays that pass through the opening, and a radiating end disposed opposite to the incident end.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention [0001]
  • The invention relates to an illuminating apparatus for a liquid crystal projection display, more particularly to an illuminating apparatus that utilizes a plurality of light sources to generate input light for a projection display. [0002]
  • 2. Description of the Related Art [0003]
  • In a conventional liquid crystal projection display, input light is separated into color components that are modulated and subsequently recombined to generate an image output. A single light source is commonly used to generate the input light in the conventional projection display. For projection displays with a high requirement of brightness, the single light source will incur a corresponding increase in power requirement. High-power single light sources are disadvantageous in that there is a severe heat dissipation problem that is difficult to resolve when such light sources are in use. [0004]
    • SUMMARY OF THE INVENTION
  • The object of the present invention is to provide an illuminating apparatus that utilizes a plurality of light sources to generate bright input light for a projection display. [0005]
  • According to the present invention, an illuminating apparatus comprises: [0006]
  • a lighting unit including a plurality of lighting members that are spaced apart from each other and that are operable so as to produce forwardly directed parallel light rays; [0007]
  • a first reflector disposed in front of the lighting unit and having a central region formed with an opening, and a peripheral region around the central region and formed with a first reflecting surface that confronts the lighting unit and that reflects the forwardly directed parallel light rays from the lighting members to converge rearwardly; [0008]
  • a second reflector disposed behind the first reflector and registered with the central region of the first reflector, the second reflector being formed with a second reflecting surface that faces the opening in the first reflector such that the light rays reflected from the first reflecting surface are further reflected by the second reflecting surface so as to pass through the opening in the first reflector; and [0009]
  • an integrator disposed in front of the first reflector and having an incident end disposed proximate to the opening in the first reflector to receive the light rays that pass through the opening, and a radiating end disposed opposite to the incident end. [0010]
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which: [0011]
  • FIG. 1 is a partly sectional schematic side view of the first preferred embodiment of an illuminating apparatus according to the present invention; [0012]
  • FIG. 2 is a schematic rear end view of the first preferred embodiment; and [0013]
  • FIG. 3 is a partly sectional schematic side view of the second preferred embodiment of an illuminating apparatus according to the present invention.[0014]
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Referring to FIGS. 1 and 2, the first preferred embodiment of an illuminating apparatus according to the present invention is shown to comprise a lighting unit [0015] 1, a first reflector 2, a second reflector 3, and an integrator 4.
  • The lighting unit [0016] 1 includes a plurality of lighting members 11 that are arranged in a ring formation and that are angularly spaced apart from each other. Each lighting member 11 includes a light source 111 and a parabolic reflector 112 for reflecting light rays that radiate from the light source 111 to produce forwardly directed parallel light rays.
  • The [0017] first reflector 2 is disposed in front of the lighting unit 1, and has a central region formed with an opening 21, and a peripheral region around the central region and aligned with the lighting members 11. The peripheral region is formed with a curved first reflecting surface 22, such as a convex reflecting surface, that confronts the lighting unit 1 and that reflects the forwardly directed parallel lightrays from the lighting members 11 to converge rearwardly.
  • The [0018] second reflector 3 is disposed behind the first reflector 2 and is registered with the central region of the first reflector 2. The second reflector 3 is formed with a curved second reflecting surface 31, such as a convex reflecting surface, that faces the opening 21 in the first reflector 2 such that the light rays reflected from the first reflecting surface 22 are further reflected by the second reflecting surface 31 so as to pass through the opening 21. In this embodiment, the second reflecting surface 31 cooperates with the first reflecting surface 22 such that the light rays passing through the opening 21 converge at a point 32 that is in front of the first reflector 2. Note that the second reflector 3 has a size sufficient so as not to block passage of the forwardly directed parallel light rays from the lighting members 11 to the peripheral region of the first reflector 2.
  • The [0019] integrator 4 is disposed in front of the first reflector 2, and has an incident end 41 disposed proximate to the opening 21 in the first reflector 2 to receive the light rays that pass through the opening 21, and a radiating end 42 opposite to the incident end 41. The integrator 4, which has the incident and radiating ends 41, 42 thereof aligned with the opening 21 in the first reflector 2 about an optical axis, may be formed as a glass cylinder, or as a hollow cylinder having an inner wall surface coated with a reflective film. The point 32, where the light rays passing through the opening 21 converge, coincides with the incident end 41 of the integrator 4. Input light for a liquid crystal projection display (not shown) can be obtained from the radiating end 42.
  • Because the high power of the lighting unit [0020] 1 is distributed among the lighting members 11, the heat dissipation problem commonly encountered with the use of a high-power single light source as taught in the prior art can be easily overcome.
  • Referring to FIG. 3, the second preferred embodiment of an illuminating apparatus according to the present invention is shown to comprise a [0021] lighting unit 51, a first reflector 52, a second reflector 53, and an integrator 54.
  • The [0022] lighting unit 51 is similar to the lighting unit 1 of the previous embodiment, and includes a plurality of lighting members 511.
  • The [0023] first reflector 52 is disposed in front of the lighting unit 51, and has a central region formed with an opening 521, and a peripheral region around the central region and formed with a curved first reflecting surface 522 that confronts the lighting unit 51 and that reflects forwardly directed parallel light rays from the lighting members 511 to converge rearwardly.
  • The [0024] second reflector 53 is disposed behind the first reflector 52 and is registered with the central region of the first reflector 52. The second reflector 53 is formed with a curved second reflecting surface 531 that faces the opening 521 in the first reflector 52 such that the light rays reflected from the first reflecting surface 522 are further reflected by the second reflecting surface 531 so as to pass through the opening 521 in the first reflector 52. In this embodiment, the second reflecting surface 531 cooperates with the first reflecting surface 522 such that the light rays reflected by the second reflecting surface 531 are parallel to each other as they pass through the opening 521 in the first reflector 52.
  • The [0025] integrator 54 is disposed in front of the first reflector 52, and has an incident end 541 disposed proximate to the opening 521 in the first reflector 52 to receive the light rays that pass through the opening 521, and a radiating end 542 opposite to the incident end 541. The integrator 54, which has the incident and radiating ends 541, 542 thereof aligned with the opening 521 in the first reflector 52 about an optical axis, includes front and rear array- type integration lenses 544, 543 that are spaced apart from each other along the optical axis and that are formed respectively with the radiating and incident ends 542, 541. Input light for a liquid crystal projection display (not shown) can be obtained from the radiating end 542.
  • Like the previous embodiment, because the high power of the [0026] lighting unit 51 is distributed among the lighting members 511, the heat dissipation problem commonly encountered with the use of a high-power single light source as taught in the prior art can be easily overcome.
  • Preferably, a [0027] filter 55 is disposed in front of the integrator 54 to remove ultraviolet and infrared light rays. A focusing lens 56 can be additionally disposed in front of the filter 55.
  • While the present invention has been described in connection with what is considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements. [0028]

Claims (13)

I claim:
1. An illuminating apparatus comprising:
a lighting unit including a plurality of lighting members that are spaced apart from each other and that are operable so as to produce forwardly directed parallel light rays;
a first reflector disposed in front of said lighting unit and having a central region formed with an opening, and a peripheral region around said central region and formed with a first reflecting surface that confronts said lighting unit and that reflects the forwardly directed parallel light rays from said lighting members to converge rearwardly;
a second reflector disposed behind said first reflector and registered with said central region of said first reflector, said second reflector being formed with a second reflecting surface that faces said opening in said first reflector such that the light rays reflected from said first reflecting surface are further reflected by said second reflecting surface so as to pass through said opening in said first reflector; and
an integrator disposed in front of said first reflector and having an incident end disposed proximate to said opening in said first reflector to receive the light rays that pass through said opening, and a radiating end disposed opposite to said incident end.
2. The illuminating apparatus of claim 1, wherein said lighting members are arranged in a ring formation and are angularly spaced apart from each other.
3. The illuminating apparatus of claim 2, wherein said lighting members are aligned with said peripheral region of said first reflector.
4. The illuminating apparatus of claim 3, wherein said second reflector has a size sufficient so as not to block passage of the forwardly directed parallel light rays from said lighting members to said peripheral region of said first reflector.
5. The illuminating apparatus of claim 1, wherein each of said lighting members includes a light source and a parabolic reflector for reflecting light rays that radiate from said light source to produce the forwardly directed parallel light rays.
6. The illuminating apparatus of claim 1, wherein said second reflecting surface cooperates with said first reflecting surface such that the light rays passing through said opening converge at a point that is in front of said first reflector and that coincides with said incident end of said integrator.
7. The illuminating apparatus of claim 6, wherein said integrator is formed as a glass cylinder.
8. The illuminating apparatus of claim 7, wherein said incident and radiating ends of said integrator are aligned with said opening in said first reflector about an optical axis.
9. The illuminating apparatus of claim 6, wherein said integrator is formed as a hollow cylinder having an inner wall surface coated with a reflective film.
10. The illuminating apparatus of claim 9, wherein said incident and radiating ends of said integrator are aligned with said opening in said first reflector about an optical axis.
11. The illuminating apparatus of claim 1, wherein said second reflecting surface cooperates with said first reflecting surface such that the light rays reflected by said second reflecting surface are parallel to each other as they pass through said opening in said first reflector.
12. The illuminating apparatus of claim 11, wherein said incident and radiating ends of said integrator are aligned with said opening in said first reflector about an optical axis.
13. The illuminating apparatus of claim 12, wherein said integrator includes front and rear array-type integration lenses that are spaced apart from each other along the optical axis and that are formed respectively with said radiating and incident ends.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070285923A1 (en) * 2006-06-07 2007-12-13 Hsin-Chin Chen Shining device for indication purpose
EP1912444A2 (en) 2006-10-09 2008-04-16 Digital Projection Limited Light source
GB2457296A (en) * 2008-02-09 2009-08-12 Apticol Ltd Optical device e.g. radiant-power-transferring light engine
US20110110096A1 (en) * 2009-11-09 2011-05-12 Hong Sungho Lighting device
US20110292654A1 (en) * 2009-02-05 2011-12-01 Ultralite Deutschland Haerle Lichttechnik Gmbh Lighting device having a plurality of light sources and a reflection arrangement and reflector unit
EP2664958A1 (en) * 2012-05-18 2013-11-20 Ricoh Company, Ltd. Light source apparatus and image projection apparatus
EP2772799A1 (en) * 2013-02-26 2014-09-03 Ricoh Company Ltd. Light source unit and image projection apparatus including light source unit
CN104048214A (en) * 2013-03-14 2014-09-17 株式会社理光 Light source unit, lighting apparatus and image projection apparatus
JP2014178464A (en) * 2013-03-14 2014-09-25 Ricoh Co Ltd Light source unit, illuminating device, and image projecting device
WO2014201797A1 (en) * 2013-06-20 2014-12-24 京东方科技集团股份有限公司 Backlight module and manufacturing method thereof, display device and drive method
CN104756008A (en) * 2012-11-06 2015-07-01 索尼公司 Light source unit, light source device, and image display device
US20160259234A1 (en) * 2015-03-02 2016-09-08 Seiko Epson Corporation Light source apparatus, illuminator, and projector

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2406163B (en) * 2002-06-21 2006-03-29 Wavien Inc Multiple lamp illumination system
US7237929B2 (en) * 2002-10-23 2007-07-03 Stahl Thomas D Method and apparatus for a projection system
EP1505435A1 (en) * 2003-08-05 2005-02-09 Sony International (Europe) GmbH Illumination unit having two discharge lamps for a projector
US20060268417A1 (en) * 2005-05-27 2006-11-30 Texas Instruments Incorporated A Refractive Scheme for Dual Lamp High Brightness Projection System
DE102006044019B4 (en) * 2006-09-15 2011-12-29 Stiftung Alfred-Wegener-Institut für Polar- und Meeresforschung Stiftung des öffentlichen Rechts reflector spotlight
US7654716B1 (en) * 2006-11-10 2010-02-02 Doheny Eye Institute Enhanced visualization illumination system
JP2010520589A (en) * 2007-02-28 2010-06-10 ドヘニー アイ インスティテュート Portable handheld lighting system
TWI370316B (en) * 2007-07-27 2012-08-11 Aixin Technologies Llc Illumination system
WO2011143500A2 (en) 2010-05-13 2011-11-17 Doheny Eye Institute Self contained illuminated infusion cannula systems and devices
US8783924B1 (en) * 2010-12-20 2014-07-22 Soundoff Signal, Inc. Wide angle illumination assembly and reflector therefor
DE102011085978A1 (en) * 2011-11-09 2013-05-16 Osram Gmbh LASER FLASH DEVICE WITH LASER ARRAY
JP5928300B2 (en) 2012-10-26 2016-06-01 ソニー株式会社 Light source unit, light source device, and image display device
CN104102080A (en) * 2013-04-10 2014-10-15 台达电子工业股份有限公司 Light source module and projection apparatus applying same
TWI493275B (en) * 2013-04-20 2015-07-21 Appotronics China Corp A lighting device and a projection system
DE102014205452A1 (en) * 2014-03-24 2015-09-24 Osram Gmbh Light source arrangement with a plurality of semiconductor laser light sources
US20180119923A1 (en) * 2015-05-14 2018-05-03 Sony Corporation Phosphor substrate, light source device, and projection display unit
CN105757606A (en) * 2016-03-03 2016-07-13 英华达（上海）科技有限公司 Lighting system and image acquisition system
CN106444255A (en) * 2016-12-27 2017-02-22 海信集团有限公司 Laser projection apparatus and laser light source thereof
CN209448216U (en) * 2019-03-08 2019-09-27 深圳市星汉激光科技有限公司 A kind of laser composite light source

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4651257A (en) * 1985-07-15 1987-03-17 American Sterilizer Company Multiple source lighting fixture
CH687890C1 (en) * 1994-05-24 2001-05-31 James Rosset COLOR CHANGER PROJECTOR
US5754278A (en) * 1996-11-27 1998-05-19 Eastman Kodak Company Image transfer illumination system and method
US5951139A (en) * 1997-04-17 1999-09-14 Steris Corporation Surgical light with reflector-lamps and flat reflector panels
US6205271B1 (en) * 1999-09-15 2001-03-20 Christie Digital Systems, Inc. Optical integrator rod

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070285923A1 (en) * 2006-06-07 2007-12-13 Hsin-Chin Chen Shining device for indication purpose
US7738177B2 (en) 2006-10-09 2010-06-15 Digital Projection Limited Light source
EP1912444A2 (en) 2006-10-09 2008-04-16 Digital Projection Limited Light source
US20080094721A1 (en) * 2006-10-09 2008-04-24 Moss Graham H Light source
GB2457296A (en) * 2008-02-09 2009-08-12 Apticol Ltd Optical device e.g. radiant-power-transferring light engine
US8894236B2 (en) * 2009-02-05 2014-11-25 Ultralite Deutschland Haerle Lichttechnik Gmbh Lighting device having a plurality of light sources and a reflection arrangement and reflector unit
US20110292654A1 (en) * 2009-02-05 2011-12-01 Ultralite Deutschland Haerle Lichttechnik Gmbh Lighting device having a plurality of light sources and a reflection arrangement and reflector unit
US20110110096A1 (en) * 2009-11-09 2011-05-12 Hong Sungho Lighting device
US9200761B2 (en) 2009-11-09 2015-12-01 Lg Innotek Co., Ltd. Lighting device for indirect illumination
US8573802B2 (en) * 2009-11-09 2013-11-05 Lg Innotek Co., Ltd. LED lighting device for indirect illumination
CN103424973A (en) * 2012-05-18 2013-12-04 株式会社理光 Light source apparatus and image projection apparatus and display apparatus
EP2664958A1 (en) * 2012-05-18 2013-11-20 Ricoh Company, Ltd. Light source apparatus and image projection apparatus
US9625800B2 (en) 2012-11-06 2017-04-18 Sony Corporation Light source, light source apparatus, and image display apparatus to facilitate cooling and handling of the light source
CN104756008A (en) * 2012-11-06 2015-07-01 索尼公司 Light source unit, light source device, and image display device
EP2772799A1 (en) * 2013-02-26 2014-09-03 Ricoh Company Ltd. Light source unit and image projection apparatus including light source unit
US9557631B2 (en) 2013-02-26 2017-01-31 Ricoh Company, Ltd. Light source unit and image projection apparatus including light source unit
US20140268068A1 (en) * 2013-03-14 2014-09-18 Ricoh Company, Ltd. Light source unit, lighting apparatus and image projection apparatus
JP2014199434A (en) * 2013-03-14 2014-10-23 株式会社リコー Light source unit and illumination device, and image projection device
US9354498B2 (en) 2013-03-14 2016-05-31 Ricoh Company, Ltd. Light source unit, lighting apparatus and image projection apparatus
JP2014178464A (en) * 2013-03-14 2014-09-25 Ricoh Co Ltd Light source unit, illuminating device, and image projecting device
CN104048214A (en) * 2013-03-14 2014-09-17 株式会社理光 Light source unit, lighting apparatus and image projection apparatus
US9857672B2 (en) * 2013-03-14 2018-01-02 Ricoh Company, Ltd Light source unit, lighting apparatus and image projection apparatus
WO2014201797A1 (en) * 2013-06-20 2014-12-24 京东方科技集团股份有限公司 Backlight module and manufacturing method thereof, display device and drive method
US20150338704A1 (en) * 2013-06-20 2015-11-26 Boe Technology Group Co., Ltd. Backlight module, manufacturing method thereof, display device, and driving method
US10007146B2 (en) * 2013-06-20 2018-06-26 Boe Technology Group Co., Ltd. Backlight module, manufacturing method thereof, display device, and driving method
US20160259234A1 (en) * 2015-03-02 2016-09-08 Seiko Epson Corporation Light source apparatus, illuminator, and projector
US9804486B2 (en) * 2015-03-02 2017-10-31 Seiko Epson Corporation Light source apparatus, illuminator, and projector having multiple reflection elements

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