EP 1095368 A1 20010502 - METHOD FOR OPERATING A LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE WITH TEMPERATURE COMPENSATION
Title (en)
METHOD FOR OPERATING A LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE WITH TEMPERATURE COMPENSATION
Title (de)
VERFAHREN ZUM BETRIEB EINER LCD-ANZEIGEVORRICHTUG UND LCD-ANZEIGEVORRICHTUNG MIT TEMPERATURKOMPENSATION
Title (fr)
PROCEDE POUR FAIRE FONCTIONNER UN DISPOSITIF D'AFFICHAGE A CRISTAUX LIQUIDES, ET DISPOSITIF D'AFFICHAGE A CRISTAUX LIQUIDES A COMPENSATION DE TEMPERATURE
Publication
Application
Priority
- DE 9902018 W 19990701
- DE 19831822 A 19980715
Abstract (en)
[origin: DE19831822A1] A method of operating a liquid crystal display (LCD) device (1), which is back-lighted by a cold-cathode tube (13), is based on measurement of the ambient temperature of the cold-cathode tube, and increasing the power supply to the cold-cathode tube (13) in relation to the power supply during normal operation, whenever the ambient temperature falls short of a threshold value. The power supply level is reduced, after a given period of time or when a definite temperature is attained, to the power supply level required for normal operation or drive.
IPC 1-7
IPC 8 full level
G02F 1/133 (2006.01); G09G 3/34 (2006.01); G09G 3/36 (2006.01); H05B 41/24 (2006.01)
CPC (source: EP)
G09G 3/3406 (2013.01); G09G 2320/041 (2013.01)
Citation (search report)
See references of WO 0004529A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
DE 19831822 A1 20000120; DE 19831822 C2 20000525; EP 1095368 A1 20010502; JP 2002520794 A 20020709; WO 0004529 A1 20000127
DOCDB simple family (application)
DE 19831822 A 19980715; DE 9902018 W 19990701; EP 99945874 A 19990701; JP 2000560568 A 19990701