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1. WO2000039500 - A BACKLIGHT FOR CORRECTING DIAGONAL LINE DISTORTION

Publication Number WO/2000/039500
Publication Date 06.07.2000
International Application No. PCT/US1999/031116
International Filing Date 28.12.1999
Chapter 2 Demand Filed 29.06.2000
IPC
F21V 5/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
5Refractors for light sources
F21V 7/04 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
7Reflectors for light sources
04Optical design
F21V 8/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
8Use of light guides, e.g. fibre optic devices, in lighting devices or systems
G01D 11/28 2006.01
GPHYSICS
01MEASURING; TESTING
DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED BY A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; TRANSFERRING OR TRANSDUCING ARRANGEMENTS NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
11Component parts of measuring arrangements not specially adapted for a specific variable
28Structurally-combined illuminating devices
G02B 5/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
G02B 5/04 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
04Prisms
CPC
G02B 6/0038
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
0035provided on the surface of the light guide or in the bulk of it
0038Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
G02B 6/0051
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
005provided by one optical element, or plurality thereof, placed on the light output side of the light guide
0051Diffusing sheet or layer
G02B 6/0053
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
005provided by one optical element, or plurality thereof, placed on the light output side of the light guide
0053Prismatic sheet or layer; Brightness enhancement element, sheet or layer
G02B 6/0061
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
6Light guides
0001specially adapted for lighting devices or systems
0011the light guides being planar or of plate-like form
0033Means for improving the coupling-out of light from the light guide
0058varying in density, size, shape or depth along the light guide
0061to provide homogeneous light output intensity
Y10S 385/901
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
385Optical waveguides
901Illuminating or display apparatus
Applicants
  • PHYSICAL OPTICS CORPORATION [US/US]; Suite 103 20600 Gramercy Place Torrance, CA 90501, US
Inventors
  • LAINE, Jeffrey, A.; US
Agents
  • NILLES, Andrew, J.; Nilles & Nilles, S.C. Firstar Center Suite 2000 777 East Wisconsin Avenue Milwaukee, WI 53202, US
Priority Data
09/223,98731.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A BACKLIGHT FOR CORRECTING DIAGONAL LINE DISTORTION
(FR) ECLAIRAGE PAR L'ARRIERE CORRIGEANT LA DISTORSION DES DIAGONALES
Abstract
(EN)
A backlight apparatus has a collimating waveguide with a light input end (54), a top surface (58), a bottom surface (56), opposing sides (60), a far end opposite the light input end (62), and a total internal reflection critical angle for the material of the waveguide. A plurality of first facets (80) are formed in the bottom surface (56) distributed along the waveguide between the light input end (54) and the far end (62). Each of the first facets (80) has a first facet bottom surface (82) which converges toward the top surface in a direction away from the far end (62) relative to the top surface (58). A light scattering and reflective surface (344) is disposed adjacent the far end of the collimating waveguide. The first facet bottom surfaces (82) cause light rays entering the light input end to be totally internally reflected to the far end of the collimating waveguide wherein the scattering and reflective surface at the far end reflects and scatters light rays incident thereon back toward the light input end. The first facet bottom surfaces (82) then cause the light rays reflected from the far end (62) to exit the top surface (58). The first facet bottom surfaces (82) may be formed either as straight facets or as curved surface facets and may also be alternatively formed having a reflective material layer thereon.
(FR)
L'invention porte sur dispositif à éclairage par l'arrière comportant; un guide d'ondes collimateur (54); une extrémité réceptrice (54) de lumière; un plafond (58); un plancher (56); des côtés opposés; une extrémité distale (62) opposée à l'extrémité réceptrice (54); et un angle critique de réflexion totale intérieure pour le matériau du guide d'onde. Le plancher (56) comporte une série de premières facettes (80) réparties le long du guide d'ondes entre l'extrémité réceptrice (54) et l'extrémité distale (62). Chacune des premières facettes présente une surface inférieure (82) convergeant vers le plafond en s'éloignant de l'extrémité distale (62) par rapport au plafond (58). Une surface diffusant et réfléchissant la lumière (344) jouxte l'extrémité distale du guide d'ondes. Les surfaces inférieures des premières facettes (82) assurent une réflexion interne totale de la lumière entrante sur l'extrémité distale du guide d'ondes dont la surface diffuse et réfléchit ladite lumière sur l'extrémité réceptrice (54). La surface inférieure (82) des premières facettes amène la lumière ainsi réfléchie à sortir par le plafond (58). Ladite surface (82), qui peut être constituée de facettes planes ou incurvées, peut également, en variante, être revêtue d'une couche d'un matériau réfléchissant.
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