WO2008045312A1 - Appareil et procédé permettant de réduire la rétroréflexion d'un dispositif d'éclairage - Google Patents

Appareil et procédé permettant de réduire la rétroréflexion d'un dispositif d'éclairage Download PDF

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Publication number
WO2008045312A1
WO2008045312A1 PCT/US2007/021378 US2007021378W WO2008045312A1 WO 2008045312 A1 WO2008045312 A1 WO 2008045312A1 US 2007021378 W US2007021378 W US 2007021378W WO 2008045312 A1 WO2008045312 A1 WO 2008045312A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light guide
guide panel
nanostructures
turning
Prior art date
Application number
PCT/US2007/021378
Other languages
English (en)
Inventor
Ion Bita
Gang Xu
Marek Mienko
Russell Wayne Gruhlke
Original Assignee
Qualcomm Mems Technologies, Inc.
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 Qualcomm Mems Technologies, Inc. filed Critical Qualcomm Mems Technologies, Inc.
Priority to EP07852545A priority Critical patent/EP2069840A1/fr
Publication of WO2008045312A1 publication Critical patent/WO2008045312A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity

Definitions

  • the field of the invention relates to display systems.
  • Display systems may include light modulators to produce a displayed image by modulating light directed to the light modulators.
  • Such display systems may include a source of illumination to at least partly provide light to the light modulators.
  • a light modulator comprises microelectromechanical systems (MEMS).
  • MEMS microelectromechanical systems
  • Micromechanical elements may be created using deposition, etching, and or other micromachining processes that etch away parts of substrates and/or deposited material layers or that add layers to form electrical and electromechanical devices.
  • MEMS device is called an interferometric modulator.
  • interferometric modulator or interferometric light modulator refers to a device that selectively absorbs and/or reflects light using the principles of optical interference.
  • One embodiment is a method of manufacturing.
  • the method comprises providing a mold that replicates a microstructure formed on a crystalline surface.
  • the microstructure defines a shape, which when replicated on a light guide panel using the mold, is configured to direct light out of the light guide panel.
  • the method further comprises applying the mold to a material so as to form at least part of a light guide panel.
  • One embodiment comprises an illumination apparatus.
  • the illumination apparatus comprises a light guide panel configured to guide light therein.
  • the apparatus further comprises a plurality of nanostructures disposed on the light guide panel.
  • the plurality of nanostructures has an effective thickness and effective refractive index so as to reduce reflection of light from said light guide panel.
  • the light guide panel comprises a first section comprising said nanostructures arranged in parallel rows and a second section comprising said nanostructures arranged in parallel rows. The rows in the first section and the rows in the second section are non-parallel. The first and second sections are adjacent.
  • FIG. 1 is an isometric view depicting a portion of one embodiment of an interferometric modulator display in which a movable reflective layer of a first interferometric modulator is in a relaxed position and a movable reflective layer of a second interferometric modulator is in an actuated position.
  • FIG. 3 is a diagram of movable mirror position versus applied voltage for one exemplary embodiment of an interferometric modulator of FIG. 1.
  • FIG. 4 is an illustration of a set of row and column voltages that may be used to drive an interferometric modulator display.
  • FIGS. 5A and 5B illustrate one exemplary timing diagram for row and column signals that may be used to write a frame of display data to the 3x3 interferometric modulator display of FIG. 2.
  • FIGS. 6A and 6B are system block diagrams illustrating an embodiment of a visual display device comprising a plurality of interferometric modulators.
  • FIG. 7E is a cross-section of an additional alternative embodiment of an interferometric modulator.
  • FIG. 1 1 is a perspective view of one embodiment of an anti-reflective coating comprising a two-dimensional array of nano-scale posts such as illustrated in FIG. 1 OB.
  • the transceiver 47 can be replaced by a receiver.
  • network interface 27 can be replaced by an image source, which can store or generate image data to be sent to the processor 21.
  • the image source can be a digital video disc (DVD) or a hard-disc drive that contains image data, or a software module that generates image data.
  • the array driver 22 receives the formatted information from the driver controller 29 and reformats the video data into a parallel set of waveforms that are applied many times per second to the hundreds and sometimes thousands of leads coming from the display's x-y matrix of pixels.
  • FlG. 9 is a cross-section of one embodiment of the display device 100 that further comprises an anti-reflective coating (ARC) 130.
  • the example ARC 130 of FlG. 9 comprises a film applied to the surface 129 of the light guide 92.
  • ARC anti-reflective coating
  • a portion 131 of the incident ambient light 122 that is reflected by the ARC has a lower intensity than the portion 126 that would be reflected by the surface 129 of the light guide 92 without the ARC 130.
  • such elements 170 may be formed using holography, a stochastic etch mask, e.g., a substrate coated with sol-gel self-assembled nanorod networks or a nanoparticle layer.
  • the elements 170 may also be arranged periodically, non-periodically, aperiodically, nonuniformly, stochastically, or randomly, or combinations thereof.
  • films, layers, components, and/or elements may be added, removed, or rearranged. Additionally, processing steps may be added, removed, or reordered.
  • film, coating, and layer have been used herein, such terms as used herein include film stacks and multiple layers or multilayers. Such film stacks, multiple layer or multilayers may be adhered to other structures using adhesive or may be formed on other structures using deposition or in other manners. Accordingly, as used herein, the term "on” includes both directly on and over. Thus, a first layer disposed on a second layer can include an intervening layer therebetween.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

Des modes de réalisation comprennent des dispositifs d'affichage et des dispositifs d'éclairage d'un écran. Un mode de réalisation comprend un dispositif d'affichage comprenant plusieurs modulateurs de lumière. Le dispositif comprend également un panneau de guide optique configuré pour guider la lumière à l'intérieur et disposé à l'avant de ladite pluralité de modulateurs de lumière. Le dispositif comprend également une microstructure rotative disposée sur une surface dudit guide optique, ladite microstructure rotative étant configurée pour diriger ladite lumière à l'extérieur dudit panneau de guide optique sur lesdits modulateurs de lumière. Le dispositif comprend également plusieurs nanostructures disposées sur ladite surface du panneau de guide optique, ladite pluralité de nanostructures possédant un indice d'épaisseur effectif et un indice de réfraction effectif permettant de réduire la réflexion de la lumière provenant dudit panneau de guide optique. D'autres modes de réalisation concernent des procédés de fabrication desdits appareils.
PCT/US2007/021378 2006-10-06 2007-10-05 Appareil et procédé permettant de réduire la rétroréflexion d'un dispositif d'éclairage WO2008045312A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07852545A EP2069840A1 (fr) 2006-10-06 2007-10-05 Appareil et procédé permettant de réduire la rétroréflexion d'un dispositif d'éclairage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85014106P 2006-10-06 2006-10-06
US60/850,141 2006-10-06

Publications (1)

Publication Number Publication Date
WO2008045312A1 true WO2008045312A1 (fr) 2008-04-17

Family

ID=39055711

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/021378 WO2008045312A1 (fr) 2006-10-06 2007-10-05 Appareil et procédé permettant de réduire la rétroréflexion d'un dispositif d'éclairage

Country Status (2)

Country Link
EP (1) EP2069840A1 (fr)
WO (1) WO2008045312A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012125419A1 (fr) * 2011-03-15 2012-09-20 Qualcomm Mems Technologies, Inc. Modèles de fonctionnalité de rotation de la lumière pour guides de lumière
US8789995B2 (en) 2012-01-06 2014-07-29 Qualcomm Mems Technologies, Inc. Light guide with at least partially non-transmissive coating on ledge region
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
CN105068175A (zh) * 2015-09-15 2015-11-18 深圳新亚特科技有限公司 一种新型3d异形导光装置及制作方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7907319B2 (en) 1995-11-06 2011-03-15 Qualcomm Mems Technologies, Inc. Method and device for modulating light with optical compensation
US8107155B2 (en) 2006-10-06 2012-01-31 Qualcomm Mems Technologies, Inc. System and method for reducing visual artifacts in displays
US7777954B2 (en) 2007-01-30 2010-08-17 Qualcomm Mems Technologies, Inc. Systems and methods of providing a light guiding layer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029148A1 (fr) * 1999-10-19 2001-04-26 Rolic Ag Revetement polymere a topologie structuree
US20030030764A1 (en) * 2001-07-13 2003-02-13 Hea-Chun Lee Light guiding plate, method of manufacturing the same and liquid crystal display having the light guiding plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001029148A1 (fr) * 1999-10-19 2001-04-26 Rolic Ag Revetement polymere a topologie structuree
US20030030764A1 (en) * 2001-07-13 2003-02-13 Hea-Chun Lee Light guiding plate, method of manufacturing the same and liquid crystal display having the light guiding plate

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9110289B2 (en) 1998-04-08 2015-08-18 Qualcomm Mems Technologies, Inc. Device for modulating light with multiple electrodes
US8928967B2 (en) 1998-04-08 2015-01-06 Qualcomm Mems Technologies, Inc. Method and device for modulating light
US9025235B2 (en) 2002-12-25 2015-05-05 Qualcomm Mems Technologies, Inc. Optical interference type of color display having optical diffusion layer between substrate and electrode
US9019590B2 (en) 2004-02-03 2015-04-28 Qualcomm Mems Technologies, Inc. Spatial light modulator with integrated optical compensation structure
US8971675B2 (en) 2006-01-13 2015-03-03 Qualcomm Mems Technologies, Inc. Interconnect structure for MEMS device
US9019183B2 (en) 2006-10-06 2015-04-28 Qualcomm Mems Technologies, Inc. Optical loss structure integrated in an illumination apparatus
US8979349B2 (en) 2009-05-29 2015-03-17 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
US9121979B2 (en) 2009-05-29 2015-09-01 Qualcomm Mems Technologies, Inc. Illumination devices and methods of fabrication thereof
WO2012125419A1 (fr) * 2011-03-15 2012-09-20 Qualcomm Mems Technologies, Inc. Modèles de fonctionnalité de rotation de la lumière pour guides de lumière
US8705915B2 (en) 2011-03-15 2014-04-22 Qualcomm Mems Technologies, Inc. Light turning feature patterns for lightguides
CN103477257A (zh) * 2011-03-15 2013-12-25 高通Mems科技公司 用于光导的光转向特征图案
US8789995B2 (en) 2012-01-06 2014-07-29 Qualcomm Mems Technologies, Inc. Light guide with at least partially non-transmissive coating on ledge region
CN105068175A (zh) * 2015-09-15 2015-11-18 深圳新亚特科技有限公司 一种新型3d异形导光装置及制作方法

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