EP 0635163 B1 19981216 - DEVICE FOR THE DEFLEXION OF ELECTRON BEAMS FOR CATHODE RAY TUBES, WHICH IS SELF-CONVERGENT AND GEOMETRY CORRECTED
Title (en)
DEVICE FOR THE DEFLEXION OF ELECTRON BEAMS FOR CATHODE RAY TUBES, WHICH IS SELF-CONVERGENT AND GEOMETRY CORRECTED
Title (de)
SELBSTKONVERGIERENDE UND IN DER GEOMETRIE KORRIGIERTE ELEKTRONENABLENKEINHEIT FÜR KATHODENSTRAHLRÖHREN
Title (fr)
DISPOSITIF DE DEFLEXION DES FAISCEAUX D'ELECTRONS POUR TUBES A RAYONS CATHODIQUES AUTOCONVERGENT ET CORRIGE EN GEOMETRIE
Publication
Application
Priority
- FR 9300331 W 19930402
- FR 9204249 A 19920407
Abstract (en)
[origin: FR2689679A1] Device for the deflection of electron beams for cathode ray tubes whose horizontal deflection coils are comprised of a main winding (21) and an auxiliary winding (22) situated in front of the main winding and wherein the current circulates in a direction opposite (31) to the direction of circulation of the current (30) in the main winding. This type of deflection device allows, locally, to amplify the harmonic of rank 2 of the field created by the winding and to decrease the amplitude of the harmonic of rank 4. Thus, the deflection device of the invention will be corrected in geometry North/South while preserving the convergence of the beams throughout the surface of the screen. Said device is particularly adapted to tubes whose image screen has a pronounced radius of curvature.
IPC 1-7
IPC 8 full level
H01J 29/70 (2006.01); H01J 29/76 (2006.01); H04N 3/16 (2006.01); H04N 9/28 (2006.01)
CPC (source: EP KR)
H01J 29/701 (2013.01 - EP); H01J 29/76 (2013.01 - EP KR)
Designated contracting state (EPC)
DE FR
DOCDB simple family (publication)
FR 2689679 A1 19931008; DE 69322629 D1 19990128; DE 69322629 T2 19990506; EP 0635163 A1 19950125; EP 0635163 B1 19981216; JP 3502634 B2 20040302; JP H07509093 A 19951005; KR 100430129 B1 20040715; KR 950701765 A 19950428; WO 9320578 A1 19931014
DOCDB simple family (application)
FR 9204249 A 19920407; DE 69322629 T 19930402; EP 93907920 A 19930402; FR 9300331 W 19930402; JP 51717193 A 19930402; KR 19940703587 A 19941007