EP 1677277 B1 20100602 - Control procedure for a matrix display screen
Title (en)
Control procedure for a matrix display screen
Title (de)
Verfahren zur Steuerung einer Matrix-Anzeige
Title (fr)
Procédé de commande d'un écran de visualisation matriciel
Publication
Application
Priority
FR 0413978 A 20041228
Abstract (en)
[origin: EP1677277A2] The method involves applying a line selection voltage (VLS) to a line and a voltage to a column related to a grey level, during a line selection time (Tl) that is subdivided into groups according to a non-linear law with a transfer function close to the inverse of a gamma correction transfer function. The column voltage takes a value of one of two voltages throughout one group or switches from one voltage to the other during the group. The grey level is numerically coded according to the gamma transfer function based on the perception of the eye. The column voltage is selected among voltages (Vc0-Vc4) that are distributed in pairs. An independent claim is also included for a device for controlling a matrix display screen.
IPC 8 full level
G09G 3/22 (2006.01)
CPC (source: EP US)
G09G 3/22 (2013.01 - EP US); G09G 3/2081 (2013.01 - EP US); G09G 2320/0276 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1677277 A2 20060705; EP 1677277 A3 20090513; EP 1677277 B1 20100602; AT E470212 T1 20100615; DE 602005021603 D1 20100715; FR 2880173 A1 20060630; FR 2880173 B1 20070511; JP 2006189841 A 20060720; US 2006139250 A1 20060629; US 7710363 B2 20100504
DOCDB simple family (application)
EP 05113010 A 20051227; AT 05113010 T 20051227; DE 602005021603 T 20051227; FR 0413978 A 20041228; JP 2005373223 A 20051226; US 31277505 A 20051221