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1. WO1996003672 - LIQUID CRYSTAL DISPLAY DEVICE EQUIPPED WITH INPUT FUNCTION AND ELECTRONIC APPLIANCE USING THE SAME

Publication Number WO/1996/003672
Publication Date 08.02.1996
International Application No. PCT/JP1995/001462
International Filing Date 21.07.1995
IPC
G02F 1/1335 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
CPC
G02F 1/133502
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
133502Antiglare, refractive index matching layers
Applicants
  • SEIKO EPSON CORPORATION [JP/JP]; 4-1, Nishi-shinjuku 2-chome Shinjuku-ku Tokyo 163, JP (AllExceptUS)
  • WADA, Hiroshi [JP/JP]; JP (UsOnly)
Inventors
  • WADA, Hiroshi; JP
Agents
  • UMEDA, Akihiko; 8-3, Toranomon 3-chome Minato-ku Tokyo 105, JP
Priority Data
6/16963721.07.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LIQUID CRYSTAL DISPLAY DEVICE EQUIPPED WITH INPUT FUNCTION AND ELECTRONIC APPLIANCE USING THE SAME
(FR) DISPOSITIF D'AFFICHAGE A CRISTAUX LIQUIDES EQUIPE D'UNE FONCTION D'ENTREE ET APPAREIL ELECTRONIQUE UTILISANT CE DISPOSITIF
Abstract
(EN)
A reflection type or semi-transparent reflection type liquid crystal device wherein an input panel having a pair of input electrodes spaced with a predetermined gap is integrated with an FSTN type liquid crystal cell. The liquid crystal display device comprises first and second polarizing plates that sandwich the input panel and the liquid crystal cell, and a phase difference plate consisting of an optically anisotropic polymer film is brought into close contact with the surface of the liquid crystal cell. Since the first polarizing plate reduces the quantity of light incident into the input panel, the quantity of light reflected at the boundary between the input panel and the air layer or reflected from the liquid crystal cell surface decreases. Further, because an air layer does not exist between the liquid crystal cell and the phase difference plate, coloration by reflected light passing through only one of them can be prevented, and black-and-white display having high contrast can be accomplished.
(FR)
Dispositif d'affichage à cristaux liquides à réflexion ou à réflexion semi-transparente dans lequel un panneau d'entrée possédant une paire d'électrodes d'entrée éloignées l'une de l'autre selon un espace prédéterminé, fait partie du même ensemble qu'une cellule de cristaux liquides de type FSTN. Ce dispositif comprend une première et une deuxième plaques de polarisation prenant en sandwich le panneau d'entrée et la cellule de cristaux liquides et une plaque de différence de phases constituée par une feuille en polymère optiquement anisotrope vient en contact étroit avec la surface de la cellule de cristaux liquides. La diminution de la quantité de lumière incidente dans le panneau d'entrée sous l'effet de la première plaque de polarisation provoque la décroissance de la quantité de lumière réfléchie au niveau de la limite entre le panneau d'entrée et la couche d'air ou réfléchie depuis la cellule de cristaux liquides. De plus, étant donné l'absence de couche d'air entre la cellule de cristaux liquides et la plaque de différence de phases, on peut empêcher la coloration causée par la lumière réfléchie traversant soit ladite cellule, soit ladite plaque et réaliser un affichage en noir et blanc extrêmement contrasté.
Also published as
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