EP 0123611 B1 19880720 - METHOD AND APPARATUS FOR ADJUSTING STATIC CONVERGENCE AND PURITY IN COLOUR CATHODE RAY TUBES
Title (en)
METHOD AND APPARATUS FOR ADJUSTING STATIC CONVERGENCE AND PURITY IN COLOUR CATHODE RAY TUBES
Publication
Application
Priority
FR 8306832 A 19830426
Abstract (en)
[origin: US4641062A] An apparatus for adjusting the static convergence and/or the purity of a color television tube particularly of the kind having a perforated mask. A magnetizable ring encircles the neck of the tube. Poles are formed in this ring by means of coils displaceable in such manner that these coils and/or their cores are applied against the periphery of the magnetizable ring. The application of the coils or of their cores against the ring renders constant the relationship between the current supplied to these coils and the intensity of magnetization obtained.
IPC 1-7
IPC 8 full level
H01J 9/44 (2006.01); H01J 29/54 (2006.01); H04N 9/28 (2006.01); H04N 17/04 (2006.01)
CPC (source: EP US)
H01J 9/44 (2013.01 - EP US)
Designated contracting state (EPC)
AT DE FR GB IT NL
DOCDB simple family (publication)
EP 0123611 A2 19841031; EP 0123611 A3 19860326; EP 0123611 B1 19880720; AT E35878 T1 19880815; DE 3472856 D1 19880825; FR 2545264 A1 19841102; FR 2545264 B1 19851213; HK 3791 A 19910118; HK 59492 A 19920821; JP H0542092 B2 19930625; JP S59205136 A 19841120; SG 78690 G 19910118; US 4641062 A 19870203
DOCDB simple family (application)
EP 84400759 A 19840417; AT 84400759 T 19840417; DE 3472856 T 19840417; FR 8306832 A 19830426; HK 3791 A 19910110; HK 59492 A 19920813; JP 8208584 A 19840425; SG 78690 A 19900925; US 78771785 A 19851017