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1. WO2001059516 - LIQUID CRYSTAL DISPLAY

Publication Number WO/2001/059516
Publication Date 16.08.2001
International Application No. PCT/JP2001/000991
International Filing Date 13.02.2001
Chapter 2 Demand Filed 24.08.2001
IPC
G02F 1/13363 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
13363Birefringent elements, e.g. for optical compensation
G02F 1/139 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
137characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
139based on orientation effects in which the liquid crystal remains transparent
CPC
G02F 1/1395
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
137characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
139based on orientation effects in which the liquid crystal remains transparent
1393the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC cells
1395Optically compensated birefringence [OCB]- cells or PI- cells
G02F 2413/105
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
2413Indexing scheme related to G02F1/13363, i.e. to birefringent elements, e.g. for optical compensation, characterised by the number, position, orientation or value of the compensation plates
10with refractive index ellipsoid inclined, or tilted, relative to the LC-layer surface O plate
105with varying inclination in thickness direction, e.g. hybrid oriented discotic LC
Applicants
  • MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. [JP]/[JP] (AT, BE, CH, CN, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, KR, LU, MC, NL, PT, SE, SG, TR)
  • ISHIHARA, Shoichi [JP]/[JP] (UsOnly)
  • TANAKA, Yoshinori [JP]/[JP] (UsOnly)
  • NAKAO, Kenji [JP]/[JP] (UsOnly)
  • HATTORI, Katsuji [JP]/[JP] (UsOnly)
  • UEMURA, Tsuyoshi [JP]/[JP] (UsOnly)
  • TSUDA, Keisuke [JP]/[JP] (UsOnly)
  • OKITA, Mitsutaka [JP]/[JP] (UsOnly)
Inventors
  • ISHIHARA, Shoichi
  • TANAKA, Yoshinori
  • NAKAO, Kenji
  • HATTORI, Katsuji
  • UEMURA, Tsuyoshi
  • TSUDA, Keisuke
  • OKITA, Mitsutaka
Agents
  • OHMAE, Kaname
Priority Data
2000-31999519.10.2000JP
2000-3290610.02.2000JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) LIQUID CRYSTAL DISPLAY
(FR) AFFICHAGE A CRISTAUX LIQUIDES
Abstract
(EN) A liquid crystal display comprising, outside an OCB mode liquid crystal cell, a liquid crystal cell (9) in which a liquid crystal layer (4) where liquid crystal molecules are bend-aligned is held between a pair of substrates (1, 8) each having a display electrode, polarizer (16) disposed behind the liquid crystal cell (9), an analyzer (13) so disposed that the transmission axis of the analyzer is generally perpendicular to the transmission axis of the polarizer on the front side of the liquid crystal cell (9), phase plates (14a, 14b) made of an optical medium having a hybrid-aligned primary optical axis and a negative refractive index anisotropy, optical biaxial phase plate and/or uniaxial phase plates (12a, 12b) having a negative optical anisotropy, and a uniaxial phase plate (15) having a positive optical anisotropy and a slow axis generally parallel to the absorption axis of analyzer (13). The viewing angle of this liquid crystal display is significantly improved.
(FR) La présente invention concerne un affichage à cristaux liquides comprenant, à l'extérieur d'une cellule à cristaux liquides fonctionnant en mode à biréfringence optiquement compensée (BOC), une cellule (9) à cristaux liquides dans laquelle la couche (4) de cristaux liquides où les molécules de cristaux liquides sont alignées en courbure est maintenue entre une paire de substrats (16) disposés derrière la cellule (9) à cristaux liquides, un analyseur (13) disposé de manière à ce que son axe de transmission soit généralement perpendiculaire à l'axe de transmission du polariseur sur la face avant de la cellule (9) à cristaux liquides, des plaques de phase (14a, 14b) fabriquées avec un support optique présentant un axe optique primaire aligné de manière hybride et une anisotropie à indice de réfraction négative, une plaque de phase biaxiale optique et/ou des plaques de phase uniaxiales (12a, 12b) présentant une anisotropie optique négative, et une plaque de phase uniaxiale (15) présentant une anisotropie optique positive et un axe lent généralement parallèle à l'axe d'absorption de l'analyseur (13). On améliore ainsi sensiblement l'angle de vue de cet affichage à cristaux liquide.
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