Global Patent Index - EP 1257995 A1

EP 1257995 A1 2002-11-20 - METHOD FOR COMPENSATING A PERTURBED CAPACITIVE CIRCUIT AND APPLICATION TO MATRIX DISPLAY DEVICE

Title (en)

METHOD FOR COMPENSATING A PERTURBED CAPACITIVE CIRCUIT AND APPLICATION TO MATRIX DISPLAY DEVICE

Title (de)

VERFAHREN ZUR KOMPENSATION EINES KAPAZITIV GESTÖRTEN SCHALTKREISES UND ANWENDUNG BEI MATRIXBILDSCHIRMEN

Title (fr)

PROCEDE DE COMPENSATION D'UN CIRCUIT CAPACITIF PERTURBE ET APPLICATION AUX ECRANS DE VISUALISATION MATRICIELS

Publication

EP 1257995 A1 (FR)

Application

EP 01909889 A

Priority

  • FR 0100539 W
  • FR 0002410 A

Abstract (en)

[origin: FR2805650A1] A resistor (Rm) is connected into the counter electrode of an active matrix liquid crystal display to measure the current whose integral is proportional to the line voltage variation during switching. An operational amplifier (IC1) circuit with a negative terminal resistor (Rint) and a capacitor (Cint) is connected to the counter electrode resistor (Rm) and produces a compensating voltage which is applied through a compensating capacitor (Ccomp).

IPC 1-7 (main, further and additional classification)

G09G 3/36; G09G 3/32

IPC 8 full level (invention and additional information)

G02F 1/133 (2006.01); G09G 3/20 (2006.01); G09G 3/36 (2006.01); G09G 3/32 (2016.01); G09G 3/3208 (2016.01)

CPC (invention and additional information)

G09G 3/3648 (2013.01); G09G 3/20 (2013.01); G09G 3/32 (2013.01); G09G 3/3208 (2013.01); G09G 3/3655 (2013.01); G09G 2300/043 (2013.01); G09G 2300/08 (2013.01); G09G 2320/0209 (2013.01)

Citation (search report)

See references of WO 0165532A1

Designated contracting state (EPC)

DE FR GB IT NL

EPO simple patent family

FR 2805650 A1 20010831; FR 2805650 B1 20050805; AU 3748701 A 20010912; DE 60141888 D1 20100602; EP 1257995 A1 20021120; EP 1257995 B1 20100421; JP 2003528341 A 20030924; JP 4789385 B2 20111012; KR 100784747 B1 20071213; KR 20030011072 A 20030206; US 2003030630 A1 20030213; US 6972747 B2 20051206; WO 0165532 A1 20010907

INPADOC legal status


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2018-01-11 [REG DE R081] CHANGE OF APPLICANT/PATENTEE

- Owner name: THOMSON LICENSING, FR

- Free text: FORMER OWNER: THALES AVIONICS LCD S.A., PARIS, FR

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