EP 1553553 A3 20080730 - Liquid crystal display driver for compensating viewing angle
Title (en)
Liquid crystal display driver for compensating viewing angle
Title (de)
Steuerschaltung einer Flüssigkristallanzeige zur Kompensation des Sichtwinkels
Title (fr)
Circuit de commande pour compensation de l'angle de vue pour un dispositif d'affichage à cristaux liquides
Publication
Application
Priority
CN 04101640 A 20040107
Abstract (en)
[origin: EP1553553A2] A system comprises a liquid crystal display viewable from front and side view points, and comprising a plurality of pixels having corresponding original luminance values, a plurality of data lines in the display, a plurality of data drivers for driving the data lines, and an adjusted gray scale generator for adjusting gray scales of the pixels and outputting two adjusted gray scales to the data drivers for driving the data lines at double the frequency. Original gray scales correspond to the original normalized luminance of front views and side views. For the adjusted gray scales stored in the look up table corresponding to the original gray scales, the sum of the absolute value of the difference between the adjusted normalized luminance values for the front and side views should be less than the sum of the absolute value of the difference between the original normalized luminance values for the front and side views in order to minimise color shifting between the front and side views.
IPC 8 full level
G09G 3/36 (2006.01); G09G 5/06 (2006.01); G09G 3/20 (2006.01)
CPC (source: EP)
G09G 3/3607 (2013.01); G09G 3/3685 (2013.01); G09G 5/06 (2013.01); G09G 3/2022 (2013.01); G09G 2300/0447 (2013.01); G09G 2300/0452 (2013.01); G09G 2320/0276 (2013.01); G09G 2320/028 (2013.01); G09G 2320/0285 (2013.01)
Citation (search report)
- [X] US 2003146893 A1 20030807 - SAWABE DAIICHI [JP]
- [X] US 2003006952 A1 20030109 - HONG HYUNG KI [KR]
- [X] US 2003058211 A1 20030327 - KIM SANG-IL [KR], et al
- [DX] US 5847688 A 19981208 - OHI SUSUMU [JP], et al
- [DX] US 2002149598 A1 20021017 - GREIER PAUL F [US], et al
- [X] JP S6037526 A 19850226 - MITSUBISHI ELECTRIC CORP
- [X] US 2003128179 A1 20030710 - CREDELLE THOMAS LLOYD [US]
- [X] US 2003160915 A1 20030828 - LIU CHUNG-YUAN [TW]
- [X] US 2003197668 A1 20031023 - SONG HONG SUNG [KR], et al
- [A] US 2004001167 A1 20040101 - TAKEUCHI MASANORI [JP], et al
- [PA] US 2004061711 A1 20040401 - KURUMISAWA TAKASHI [JP], et al
- [A] KANEKO S ET AL: "WIDE-VIEWING-ANGLE IMPROVEMENTS FOR AMLCDS", SID INTERNATIONAL SYMPOSIUM - DIGEST OF TECHNICAL PAPERS. SEATTLE, MAY 16 - 21, 1993; [SID INTERNATIONAL SYMPOSIUM - DIGEST OF TECHNICAL PAPERS], PLAYA DEL REY, SID, US, vol. 24 PART 01, 16 May 1993 (1993-05-16), pages 265 - 268, XP000470755
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL HR LT LV MK
DOCDB simple family (publication)
DOCDB simple family (application)
EP 04019705 A 20040819