EP 2109094 A1 20091014 - LCD inversion control
Title (en)
LCD inversion control
Title (de)
LCD-Umkehrungssteuerung
Title (fr)
Contrôle d'inversion LCD
Publication
Application
Priority
EP 08154287 A 20080409
Abstract (en)
A liquid crystal display device (40) has an inversion part (20) for controlling an inversion of a signal to be displayed, and a blanking insertion part (10) for driving the liquid crystal elements to a different level to that indicated by the signal in between fields or frames of the video signal, the inversion part being adaptable according to operation of the blanking insertion part. By adapting the inversion to different modes of operation, the problem of the blanking interfering with the inversion in certain modes can be avoided. For example if for any given liquid crystal element, the blanking occurs more often when the signal is inverted and less often when the signal is not inverted, then, over time a net DC field can arise, causing that element toshow a wrong color or become damaged.
IPC 8 full level
G09G 3/36 (2006.01)
CPC (source: EP)
G09G 3/3413 (2013.01); G09G 3/3614 (2013.01); G09G 3/2018 (2013.01); G09G 3/342 (2013.01); G09G 2310/0235 (2013.01); G09G 2310/0237 (2013.01); G09G 2310/024 (2013.01); G09G 2310/061 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0204 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0252 (2013.01); G09G 2320/0261 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0646 (2013.01); G09G 2320/0666 (2013.01); G09G 2360/145 (2013.01); G09G 2360/18 (2013.01)
Citation (applicant)
- US 2008001890 A1 20080103 - SONG HONG SUNG [KR], et al
- EP 0951007 B1 19991222 - BARCO NV [BE]
Citation (search report)
- [X] US 2003058229 A1 20030327 - KAWABE KAZUYOSHI [JP], et al
- [X] WO 9221123 A1 19921126 - HOTTO ROBERT [US]
- [X] US 2004239602 A1 20041202 - KIM JONG DAE [KR], et al
- [A] US 6469684 B1 20021022 - COLE JAMES R [US]
- [A] WO 0025175 A2 20000504 - PIRS JANEZ [SI], et al
- [A] US 2001004253 A1 20010621 - FUKUTOKU SYOUICHI [JP], et al
- [X] WO 2006095304 A1 20060914 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- [X] WO 2006114732 A1 20061102 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- [X] US 2007146394 A1 20070628 - AHN JI Y [KR]
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08154287 A 20080409