EP 1291842 A1 20030312 - Control method for a cold start of a liquid crystal display and control unit therefor
Title (en)
Control method for a cold start of a liquid crystal display and control unit therefor
Title (de)
Verfahren und Einrichtung zum Steuern des Kaltstarts eines Flüssigkristallanzeigegeräts
Title (fr)
Méthode et dispositif de commande d' un démarrage à froid d' un dispositif d'affichage à cristaux liquides
Publication
Application
Priority
GB 0121663 A 20010907
Abstract (en)
A method of enhancing the response time of a liquid crystal display comprises the steps of measuring the temperature (TLC ) of a liquid crystal material forming part of the display, applying a drive voltage signal to the liquid crystal material at a selected frame refresh frequency so as to display an image and selecting the frame refresh frequency depending upon the measured temperature of the liquid crystal material. In the event that the measured temperature is less than the predetermined temperature (step 38), a cold kick time period (Tcoldkick) is determined (steps 36) depending upon the measured temperature. A negative bias voltage is applied (step 44) across the liquid crystal material for the duration of the cold kick time period. The effect of adjusting the frame refresh frequency in accordance with the measured temperature and of applying a negative bias voltage to the display serves to significantly enhance the response time of the device. <IMAGE>
IPC 1-7
IPC 8 full level
G09G 3/36 (2006.01)
CPC (source: EP)
G09G 3/3611 (2013.01); G09G 3/3625 (2013.01); G09G 2300/023 (2013.01); G09G 2310/063 (2013.01); G09G 2320/041 (2013.01); G09G 2330/026 (2013.01)
Citation (search report)
- [Y] US 6232937 B1 20010515 - JACOBSEN JEFFREY [US], et al
- [Y] EP 1113412 A2 20010704 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [Y] EP 0875881 A2 19981104 - SHARP KK [JP]
- [A] US 5164849 A 19921117 - EVANS LANSING B [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
EP 1291842 A1 20030312; EP 1291842 B1 20100616; AT E471553 T1 20100715; DE 60236713 D1 20100729; GB 0121663 D0 20011031
DOCDB simple family (application)
EP 02256154 A 20020905; AT 02256154 T 20020905; DE 60236713 T 20020905; GB 0121663 A 20010907