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1. WO2000039631 - LIQUID CRYSTAL DISPLAY WITH IMPROVED VIEWING ANGLE

Publication Number WO/2000/039631
Publication Date 06.07.2000
International Application No. PCT/IB1999/001995
International Filing Date 14.12.1999
Chapter 2 Demand Filed 13.07.2000
IPC
G02B 5/30 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
G02F 1/13363 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
1335Structural association of cells with optical devices, e.g. polarisers or reflectors
13363Birefringent elements, e.g. for optical compensation
G02F 1/1337 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
1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
CPC
G02B 5/3016
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
3016involving passive liquid crystal elements
G02F 1/133636
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
13363Birefringent elements, e.g. for optical compensation
133636with twisted orientation, e.g. comprising helically oriented LC-molecules or a plurality of twisted birefringent sublayers
G02F 1/133788
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
1337Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
13378by treatment of the surface, e.g. embossing, rubbing, light irradiation
133788by light irradiation, e.g. linearly polarised light photo-polymerisation
G02F 2202/023
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
2202Materials and properties
02organic material
022polymeric
023curable
Applicants
  • ROLIC AG [CH/CH]; Chamerstrasse 50 CH-6301 Zug, CH (AllExceptUS)
  • SCHMITT, Klaus [DE/DE]; DE (UsOnly)
  • SEIBERLE, Hubert [DE/DE]; DE (UsOnly)
  • SCHADT, Martin [CH/CH]; CH (UsOnly)
Inventors
  • SCHMITT, Klaus; DE
  • SEIBERLE, Hubert; DE
  • SCHADT, Martin; CH
Agents
  • LIEBETANZ, Michael; Isler & Pedrazzini AG Postfach 6940 CH-8023 Zurich, CH
Priority Data
9828690.924.12.1998GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LIQUID CRYSTAL DISPLAY WITH IMPROVED VIEWING ANGLE
(FR) AFFICHAGE A CRISTAUX LIQUIDES A ANGLE D'OBSERVATION AMELIORE
Abstract
(EN)
To improve the viewing angle of a liquid crystal display, it is provided with a compensating layer consisting of a cross-linked cholesteric liquid polymer layer with a very short helix pitch and the helix axis normal to the layer. The layer has negative uniaxial optical anisotropy.
(FR)
Afin d'améliorer l'angle d'observation d'un affichage à cristaux liquides, on prévoit une couche de compensation consistant en un couche de polymère liquide cholestérique réticulé possédant un pas d'hélice très petit, l'axe de l'hélice étant parallèle à la couche. Ladite couche possède une anisotropie optique monoaxiale négative.
Also published as
DE19983809
US09869008
Latest bibliographic data on file with the International Bureau