EP 0349415 B1 19930609 - METHOD AND DEVICE FOR CONTROLLING A MATRIX SCREEN DISPLAYING GRAY LEVELS
Title (en)
METHOD AND DEVICE FOR CONTROLLING A MATRIX SCREEN DISPLAYING GRAY LEVELS
Publication
Application
Priority
FR 8808756 A 19880629
Abstract (en)
[origin: EP0349415A1] According to the invention, activation signals are sent to the columns of the screen, in the course of the line time T, for a time which depends on the grey level i of the image point under consideration and which equals (T/N). Nil with 0 </= i </= m </= N, the Nil forming a strictly ascending sequence in i, with zero first term and with last term less than or equal to N. The Nil are chosen so as to obtain a specified distribution for the luminous intensities of the various grey levels. <??>Application to the control of liquid-crystal or microtip matrix screens. <IMAGE>
IPC 1-7
IPC 8 full level
G09G 3/22 (2006.01); G09G 3/30 (2006.01); G09G 3/36 (2006.01); G09G 5/22 (2006.01); G09G 3/20 (2006.01)
CPC (source: EP KR US)
G09G 3/20 (2013.01 - KR); G09G 3/22 (2013.01 - EP US); G09G 3/3611 (2013.01 - EP US); G09G 3/3685 (2013.01 - EP US); G09G 3/2014 (2013.01 - EP US); G09G 2310/027 (2013.01 - EP US); G09G 2320/0693 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE GB IT LI NL
DOCDB simple family (publication)
EP 0349415 A1 19900103; EP 0349415 B1 19930609; CA 1325297 C 19931214; DE 68906969 D1 19930715; DE 68906969 T2 19931223; FR 2633764 A1 19900105; FR 2633764 B1 19910215; JP H0264692 A 19900305; KR 900000830 A 19900131; KR 970006858 B1 19970430; US 5075683 A 19911224
DOCDB simple family (application)
EP 89401825 A 19890627; CA 604027 A 19890627; DE 68906969 T 19890627; FR 8808756 A 19880629; JP 16828189 A 19890629; KR 890009383 A 19890629; US 36568889 A 19890614