Global Patent Index - EP 1095368 A1

EP 1095368 A1 2001-05-02 - 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

EP 1095368 A1 (DE)

Application

EP 99945874 A

Priority

  • DE 9902018 W
  • DE 19831822 A

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 (main, further and additional classification)

G09G 3/36

IPC 8 full level (invention and additional information)

G02F 1/133 (2006.01); G09G 3/34 (2006.01); G09G 3/36 (2006.01); H05B 41/24 (2006.01)

CPC (invention and additional information)

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

EPO simple patent family

DE 19831822 A1 20000120; DE 19831822 C2 20000525; EP 1095368 A1 20010502; JP 2002520794 A 20020709; WO 0004529 A1 20000127

INPADOC legal status


2010-07-21 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20100202

2008-05-14 [RAP1] TRANSFER OF RIGHTS OF AN APPLICATION

- Owner name: CONTINENTAL AUTOMOTIVE GMBH

2001-12-05 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20011018

2001-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20001128

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE