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1. WO2012071167 - HYBRID DAYLIGHT-COUPLED BACKLIGHTS FOR SUNLIGHT VIEWABLE DISPLAYS

Publication Number WO/2012/071167
Publication Date 31.05.2012
International Application No. PCT/US2011/059677
International Filing Date 08.11.2011
IPC
G09F 9/35 2006.01
GPHYSICS
09EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
9Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
30in which the desired character or characters are formed by combining individual elements
35being liquid crystals
G02F 1/1333 2006.01
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
CPC
G02F 1/133605
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; ; Manufacturing methods
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
1336Illuminating devices
133602Direct backlight
133605including specially adapted reflectors
G02F 2001/133618
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; ; Manufacturing methods
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
1336Illuminating devices
133618for ambient light
Applicants
  • 3M INNOVATIVE PROPERTIES COMPANY [US]/[US] (AllExceptUS)
Inventors
  • BIERNATH, Rolf W.
Agents
  • VIETZKE, Lance, L.
Priority Data
12/951,33922.11.2010US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HYBRID DAYLIGHT-COUPLED BACKLIGHTS FOR SUNLIGHT VIEWABLE DISPLAYS
(FR) RÉTROÉCLAIRAGES COUPLÉS À LA LUMIÈRE DU JOUR HYBRIDES POUR AFFICHAGES VISUALISABLES À LA LUMIÈRE DU SOLEIL
Abstract
(EN)
A daylight-coupled display includes a plurality of passive backlights cascaded in a stack for backlighting of LCD panels or static display panels. The display includes a diffuser to transmit light to multiple cascaded curved reflectors, each of which reflects light for backlighting of the display. A polarization rotator is located within the backlight such that the reflectors provide the correct polarization of light to the LCD panel for backlighting of it. One daylight-coupled display can include an active light source to provide light to the reflectors. A secondary light source can provide light to at least one of the reflectors to provide backlighting of the display in low lighting conditions.
(FR)
L'invention concerne un affichage couplé à la lumière du jour qui comprend une pluralité de rétroéclairages mis en cascade dans un empilage assurant le rétroéclairage de panneaux d'affichage à cristaux liquides ou de panneaux d'affichage statique. L'affichage comprend un diffuseur qui sert à transmettre la lumière à plusieurs réflecteurs incurvés mis en cascade, chacun d'entre eux reflétant la lumière pour le rétroéclairage de l'affichage. Un rotateur de polarisation est placé à l'intérieur du rétroéclairage de manière telle que les réflecteurs assurent la polarisation correcte de la lumière vers le panneau d'affichage à cristaux liquides pour le rétroéclairer. Un affichage couplé à la lumière du jour peut inclure une source de lumière active pour fournir de la lumière aux réflecteurs. Une source de lumière secondaire peut fournir de la lumière à au moins un des réflecteurs afin d'assurer le rétroéclairage de l'affichage en conditions de faible éclairage.
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