EP 0487140 A1 19920527 - Active matrix liquid crystal display systems and methods of operating such systems.
Title (en)
Active matrix liquid crystal display systems and methods of operating such systems.
Title (de)
Flüssigkristallanzeigevorrichtungen mit aktiver Matrix und Verfahren zum Betrieb solcher Vorrichtungen.
Title (fr)
Systèmes d'affichage à cristaux liquides à matrice active et méthodes pour mettre en oeuvre ces systèmes.
Publication
Application
Priority
GB 9025080 A 19901119
Abstract (en)
An active matrix liquid crystal video display system comprises a display panel (10) having a row and column matrix array of liquid crystal picture elements (12) with respective controlling switching devices (11) for displaying video information such as TV pictures, and a drive circuit for driving the picture elements to which a video, e.g. TV, signal of given field frequency is supplied (25). In order to reduce the response time of the picture elements, the display panel is driven at a field rate higher than that of the supplied video signal. To this end, the drive circuit includes a field rate conversion circuit (28,30,31,32) comprising field stores. <IMAGE>
IPC 1-7
IPC 8 full level
G09G 3/36 (2006.01)
CPC (source: EP)
G09G 3/3648 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0252 (2013.01); G09G 2340/0435 (2013.01)
Citation (search report)
- [Y] WO 8807250 A2 19880922 - CHERRY CORP [US]
- [Y] EP 0291252 A2 19881117 - SEIKO EPSON CORP [JP]
- [A] EP 0254805 A2 19880203 - HOSIDEN ELECTRONICS CO [JP]
- [A] US 4720744 A 19880119 - WASHI KAZURO [JP], et al
- [A] EP 0368572 A2 19900516 - SHARP KK [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0487140 A1 19920527; EP 0487140 B1 19960306; DE 69117665 D1 19960411; DE 69117665 T2 19960919; GB 2249855 A 19920520; GB 9025080 D0 19910102
DOCDB simple family (application)
EP 91202929 A 19911112; DE 69117665 T 19911112; GB 9025080 A 19901119