EP 0466506 A2 19920115 - Electrooptical display device.
Title (en)
Electrooptical display device.
Title (de)
Elektrooptisches Anzeigegerät.
Title (fr)
Dispositif d'affichage électro-optique.
Publication
Application
Priority
JP 18414790 A 19900713
Abstract (en)
The present invention improves the drop of a contrast, the occurrence of cross-talk and the drop of a response speed by bringing the drive state of an electrooptical display device to theoretical values. In a display device including a display panel having common electrode groups and segment electrode groups, a common electrode drive circuit and a segment electrode drive circuit, the quantity of the current flowing through the display panel through the segment electrode drive circuit is detected by a current detection circuit consisting of a differential amplifier 101 and a resistor Ra and by a current detection circuit consisting of a differential amplifier 102 and the resistor Ra, and the common electrode drive voltage applied to the common electrode groups through the common electrode drive circuit is controlled by a differential amplifier 103 on the basis of this current detection quantity, whereby the contrast is improve, cross-talk is eliminated, and remarkable effects are obtained. <IMAGE>
IPC 1-7
IPC 8 full level
G09G 3/20 (2006.01); G09G 3/36 (2006.01); G09G 3/30 (2006.01)
CPC (source: EP)
G09G 3/20 (2013.01); G09G 3/3696 (2013.01); G09G 3/2018 (2013.01); G09G 3/30 (2013.01); G09G 3/3622 (2013.01); G09G 2320/0204 (2013.01); G09G 2320/0209 (2013.01); G09G 2320/0223 (2013.01); G09G 2330/028 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0466506 A2 19920115; EP 0466506 A3 19930421; EP 0466506 B1 19960529; DE 69119833 D1 19960704; DE 69119833 T2 19970109; HK 21997 A 19970227
DOCDB simple family (application)
EP 91306354 A 19910712; DE 69119833 T 19910712; HK 21997 A 19970227