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1. WO2013173760 - SOURCE CONDITIONING FOR IMAGING DIRECTIONAL BACKLIGHTS

Publication Number WO/2013/173760
Publication Date 21.11.2013
International Application No. PCT/US2013/041655
International Filing Date 17.05.2013
IPC
F21S 2/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
2Systems of lighting devices, not provided for in main groups F21S4/-F21S10/113
F21V 8/00 2006.1
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
G02F 1/13357 2006.1
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01for the control of the intensity, phase, polarisation or colour
13based on liquid crystals, e.g. single liquid crystal display cells
133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
1333Constructional arrangements
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
13357Illuminating devices
CPC
G02B 30/00
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
30Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
G02B 30/24
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
30Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images
20by providing first and second parallax images to an observer's left and right eyes
22of the stereoscopic type
24involving temporal multiplexing, e.g. using sequentially activated left and right shutters
G02B 6/0016
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
0013Means for improving the coupling-in of light from the light source into the light guide
0015provided on the surface of the light guide or in the bulk of it
0016Grooves, prisms, gratings, scattering particles or rough surfaces
G02B 6/0023
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
0013Means for improving the coupling-in of light from the light source into the light guide
0023provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
G02B 6/0028
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
0013Means for improving the coupling-in of light from the light source into the light guide
0023provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
0028Light guide, e.g. taper
G02B 6/003
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
0013Means for improving the coupling-in of light from the light source into the light guide
0023provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
003Lens or lenticular sheet or layer
Applicants
  • REALD INC. [US]/[US]
Inventors
  • ROBINSON, Michael, G.
  • WOODGATE, Graham, J.
  • HARROLD, Jonathan
  • SCHUCK, Miller, H.
Agents
  • MOTHEW, Neil, G., J.
Priority Data
61/648,88818.05.2012US
61/648,94218.05.2012US
61/649,05418.05.2012US
61/649,11618.05.2012US
61/727,42116.11.2012US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) SOURCE CONDITIONING FOR IMAGING DIRECTIONAL BACKLIGHTS
(FR) CONDITIONNEMENT D'UNE SOURCE POUR IMAGERIE PAR RÉTROÉCLAIRAGES DIRECTIONNELS
Abstract
(EN)
Disclosed is an imaging directional backlight apparatus for providing large area uniform directed illumination from localized light sources. Within an exemplary optical valve system, a waveguide comprises a stepped structure, where the steps comprise extraction features hidden to guided light, propagating in a first forward direction. Returning light propagating in a second backward direction may be refracted, diffracted, or reflected by the features to provide discrete illumination beams exiting from the top surface of the waveguide. Such controlled illumination may provide for efficient, multi-user autostereoscopic displays as well as improved 2D display functionality. Illumination uniformity is provided by the positioning, packaging, and optically modifying of individual input sources. The latter employs non-imaging and refractive optics.
(FR)
La présente invention concerne un appareil d'imagerie à rétroéclairage directionnel destiné à fournir un éclairage dirigé uniforme sur une grande surface à partir de sources de lumière localisées. À l'intérieur d'un système de valve optique illustratif, un guide d'onde comprend une structure étagée, dans laquelle les étages comprennent des éléments d'extraction masqués vis-à-vis de la lumière guidée, se propageant dans une première direction vers l'avant. La lumière se propageant en retour dans une seconde direction vers l'arrière peut être réfractée, diffractée, ou réfléchie par les éléments pour fournir des faisceaux d'éclairage discrets qui sortent par la surface supérieure du guide d'onde. Un tel éclairage commandé peut pourvoir des affichages autostéréoscopiques multi-utilisateurs efficaces ainsi que des fonctionnalités d'affichage 2D améliorées. L'uniformité de l'éclairage est fournie par le positionnement, le conditionnement et la modification optique de sources d'entrée individuelles. Ces dernières utilisent des optiques réfractives ne permettant pas la formation d'une image.
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