Global Patent Index - EP 0734043 B1

EP 0734043 B1 2000-05-31 - Double-gated flat display screen

Title (en)

Double-gated flat display screen

Title (de)

Doppel-Gate-Flaches Bildschirm

Title (fr)

Ecran plat de visualisation a double grille


EP 0734043 B1 (FR)


EP 96410030 A


FR 9503570 A

Abstract (en)

[origin: EP0734043A1] The screen has cathodes (1) organised in columns (28) to bombard a phosphor anode. The rows (21) of a first grid (20) are addressed sequentially during a period when the combs (24,25) of a second grid (23) are addressed alternately to form an interlaced image. The cathode columns are addressed simultaneously with each row at a potential to determine the brightness for a pixel defined by the comb addressed within the current row. The bias potential on the combs is chosen so that the electrons emitted by the cathode directly below the comb tracks (26,27) are such that the unaddressed tracks collect the electrons. The focusing potential for a track is greater than that of the unaddressed rows of the first grid while that of the collector is less. Three such assemblies are used to provide a colour display.

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

H01J 31/12

IPC 8 full level (invention and additional information)

G09G 3/22 (2006.01); H01J 29/46 (2006.01); H01J 31/12 (2006.01)

CPC (invention and additional information)

H01J 29/46 (2013.01); H01J 31/127 (2013.01)

Designated contracting state (EPC)


DOCDB simple family

EP 0734043 A1 19960925; EP 0734043 B1 20000531; DE 69608598 D1 20000706; DE 69608598 T2 20010208; FR 2732159 A1 19960927; FR 2732159 B1 19970613; JP H08293273 A 19961105; US 5764204 A 19980609