EP 0957394 A1 19991117 - Driving method and apparatus for liquid crystal display device
Title (en)
Driving method and apparatus for liquid crystal display device
Title (de)
Verfahren und Gerät zum Steuern einer Flüssigkristallanzeigevorrichtung
Title (fr)
Méthode et appareil de commande d'un dispositif d'affichage à cristaux liquides
Publication
Application
Priority
JP 13201298 A 19980514
Abstract (en)
A technique is described for driving a liquid crystal display device having a liquid crystal layer exhibiting a cholesteric phase and switchable between a planar state and a focal conic state according to the magnitude of an applied voltage. The technique comprises the steps of: in a first period, simultaneously applying a voltage by which a plurality of pixels arranged in a matrix array are reset to the focal conic state; in a second period after the first period, sequentially applying voltages corresponding to image data to the pixels, thereby updating the display contents of the pixels; and in a third period after the second period, retaining the display state by utilizing memory characteristics of the liquid crystal. <IMAGE>
IPC 1-7
IPC 8 full level
G02F 1/133 (2006.01); G09G 3/36 (2006.01); G09G 3/20 (2006.01)
CPC (source: EP)
G09G 3/3629 (2013.01); G09G 3/2014 (2013.01); G09G 3/3685 (2013.01); G09G 2300/0486 (2013.01); G09G 2310/027 (2013.01); G09G 2310/061 (2013.01); G09G 2320/0209 (2013.01)
Citation (search report)
- [PX] WO 9831002 A1 19980716 - ADVANCED DISPLAY SYS INC [US]
- [A] EP 0772067 A1 19970507 - SEIKO EPSON CORP [JP]
- [A] US 5731861 A 19980324 - HATANO TAKUJI [JP], et al
- [DA] US 5384067 A 19950124 - DOANE J WILLIAM [US], et al
- [A] PATENT ABSTRACTS OF JAPAN vol. 098, no. 009 31 July 1998 (1998-07-31)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0957394 A1 19991117; JP 3713954 B2 20051109; JP H11326871 A 19991126
DOCDB simple family (application)
EP 99109558 A 19990512; JP 13201298 A 19980514