EP 0836173 B1 20020410 - Multiplex driving method of a matrix type liquid crystal electro-optical device
Title (en)
Multiplex driving method of a matrix type liquid crystal electro-optical device
Title (de)
Verfahren zur Multiplexsteuerung einer elektrooptischen Matrix-Flüssigkristallvorrichtung
Title (fr)
Méthode de commande multiplexée pour un dispositif électrooptique à cristaux liquides du type matriciel
Publication
Application
Priority
- EP 93911979 A 19930510
- JP 14348292 A 19920508
- JP 12362392 A 19920515
- JP 19907792 A 19920702
Abstract (en)
[origin: EP0836173A2] In a multiplex driving method of a matrix type liquid crystal electro-optical device comprising a liquid crystal layer provided between a first substrate carrying row electrodes (X1, X2,...) and a second substrate carrying column electrodes (Y1, Y2,...) wherein said row and column electrodes define a matrix of pixels, said row electrodes are divided into groups and, during a selection period, the row electrodes of one group are simultaneously selected by applying a respective row voltage waveform to each of them while applying a non-selection voltage to the row electrodes of all other groups. The groups are sequentially selected. The row voltage waveforms are composed of a plurality of successive row select pulses defining a corresponding plurality of successive row select patterns. To each column electrode is applied a respective column voltage determined in response to each row select pattern and display data. The selection period is divided into plural subperiods (t1, t2, t3) and and, when a frame is defined as the time period equal to said selection period times the number of row electrode groups and a picture period comprises a certain number of frames, said column voltages are modulated during said picture period in accordance with gradation information of grey scale display data,. <IMAGE>
IPC 1-7
IPC 8 full level
G02F 1/133 (2006.01); G09G 3/20 (2006.01); G09G 3/36 (2006.01)
CPC (source: EP)
G09G 3/3622 (2013.01); G09G 3/3625 (2013.01); G09G 3/3681 (2013.01); G09G 3/2011 (2013.01); G09G 3/2014 (2013.01); G09G 3/2018 (2013.01); G09G 3/3611 (2013.01); G09G 2310/0205 (2013.01)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0836173 A2 19980415; EP 0836173 A3 19990407; EP 0836173 B1 20020410; DE 69326740 D1 19991118; DE 69326740 T2 20000406; DE 69331812 D1 20020516; DE 69331812 T2 20021114; EP 0598913 A1 19940601; EP 0598913 A4 19941026; EP 0598913 B1 19991013; JP 2000347163 A 20001215; JP 3391334 B2 20030331; JP 3508115 B2 20040322; TW 280874 B 19960711; WO 9323844 A1 19931125
DOCDB simple family (application)
EP 97120078 A 19930510; DE 69326740 T 19930510; DE 69331812 T 19930510; EP 93911979 A 19930510; JP 2000137889 A 20000510; JP 52004893 A 19930510; JP 9300604 W 19930510; TW 82104841 A 19930617