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WO2008068598A3 - Improved led illumination system, in particular for a video projector - Google Patents

Improved led illumination system, in particular for a video projector Download PDF

Info

Publication number
WO2008068598A3
WO2008068598A3 PCT/IB2007/003774 IB2007003774W WO2008068598A3 WO 2008068598 A3 WO2008068598 A3 WO 2008068598A3 IB 2007003774 W IB2007003774 W IB 2007003774W WO 2008068598 A3 WO2008068598 A3 WO 2008068598A3
Authority
WO
WIPO (PCT)
Prior art keywords
matrixes
reflecting
illumination system
led illumination
video projector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IB2007/003774
Other languages
French (fr)
Other versions
WO2008068598A2 (en
Inventor
Renato Frison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIM2 Multimedia SpA
Original Assignee
SIM2 Multimedia SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SIM2 Multimedia SpA filed Critical SIM2 Multimedia SpA
Publication of WO2008068598A2 publication Critical patent/WO2008068598A2/en
Publication of WO2008068598A3 publication Critical patent/WO2008068598A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • G03B21/208—Homogenising, shaping of the illumination light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0994—Fibers, light pipes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
    • G02B27/1033—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators having a single light modulator for all colour channels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1046—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators
    • G02B27/1053—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators having a single light modulator for all colour channels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/12—Beam splitting or combining systems operating by refraction only
    • G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays

Landscapes

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

Abstract

A LED illumination system, in particular for a video projector, is described which comprises: a light source comprising a plurality of LED matrixes (1,2,3,40,41,42,43), in particular said matrixes (1,2,3,40,41,42,43) being adapted to emit light of a different colour; a plurality of reflecting elements (21,22,23,44,45,46,47), each of said reflecting elements (21,22,23,44,45,46,47) being coupled to one of said matrixes (1,2,3,40,41,42,43) for reflecting the light thereof; an integrator (33) adapted to receive the light reflected by said plurality of reflecting elements (21,22,23,44,45,46,47) and to convey it towards a projection system. The invention is characterized in that said reflecting elements consist of a plurality of triangular-section prisms (21,22,23,44,45,46,47) having: a first side (AC3DF5IG) comprising a reflecting surface (24,25,26), a second side (BC5EF3HI) on the surface of which a first layer of air (27,29,31) is obtained, a third side (AB5DE5GH) on the surface of which a second layer of air (28,30,32) is obtained, said first (27,29,31) and second (28,30,32) layers of air being adapted to provide a TIR (Total Internal Reflection) effect on the light emitted by said matrixes (1,2,3,40,41,42,43).
PCT/IB2007/003774 2006-12-07 2007-12-05 Improved led illumination system, in particular for a video projector Ceased WO2008068598A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2006A000873 2006-12-07
IT000873A ITTO20060873A1 (en) 2006-12-07 2006-12-07 IMPROVED LED DIODE LED LIGHTING SYSTEM, IN PARTICULAR FOR A VIDEO PROJECTOR

Publications (2)

Publication Number Publication Date
WO2008068598A2 WO2008068598A2 (en) 2008-06-12
WO2008068598A3 true WO2008068598A3 (en) 2008-10-30

Family

ID=39492677

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/003774 Ceased WO2008068598A2 (en) 2006-12-07 2007-12-05 Improved led illumination system, in particular for a video projector

Country Status (3)

Country Link
IT (1) ITTO20060873A1 (en)
TW (1) TW200825618A (en)
WO (1) WO2008068598A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2501927B (en) * 2012-05-11 2016-06-08 Cymtec Ltd Waveguide assembly
GB2520252A (en) * 2013-11-12 2015-05-20 Cymtec Ltd Waveguide assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004053949A (en) * 2002-07-19 2004-02-19 Nec Viewtechnology Ltd Light source unit and projection display device
JP2004070018A (en) * 2002-08-07 2004-03-04 Mitsubishi Electric Corp Illumination optical system structure of projection device and projection device
EP1494062A2 (en) * 2003-07-03 2005-01-05 Olympus Corporation Optical beam-combining total internal reflection (TIR) prism and light-condensing illumination apparatus incorporating same
JP2006258900A (en) * 2005-03-15 2006-09-28 Sanyo Electric Co Ltd Folding type rod integrator, illuminator and projection type image display apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004107018A1 (en) 2003-06-02 2004-12-09 Koninklijke Philips Electronics N.V. Led illumination system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004053949A (en) * 2002-07-19 2004-02-19 Nec Viewtechnology Ltd Light source unit and projection display device
JP2004070018A (en) * 2002-08-07 2004-03-04 Mitsubishi Electric Corp Illumination optical system structure of projection device and projection device
EP1494062A2 (en) * 2003-07-03 2005-01-05 Olympus Corporation Optical beam-combining total internal reflection (TIR) prism and light-condensing illumination apparatus incorporating same
JP2006258900A (en) * 2005-03-15 2006-09-28 Sanyo Electric Co Ltd Folding type rod integrator, illuminator and projection type image display apparatus

Also Published As

Publication number Publication date
TW200825618A (en) 2008-06-16
WO2008068598A2 (en) 2008-06-12
ITTO20060873A1 (en) 2008-06-08

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