EP 0523322 B1 19960508 - Compensation of the electrical alternating field at the face of cathode ray picture tubes
Title (en)
Compensation of the electrical alternating field at the face of cathode ray picture tubes
Title (de)
Kompensation des elektrischen Wechselfeldes an der Frontfläche von Kathodenstrahl-Bildröhren
Title (fr)
Compensation du champ alternant sur le front de tubes images à rayons cathodiques
Publication
Application
Priority
DE 4123565 A 19910716
Abstract (en)
[origin: US5243262A] A method and apparatus for compensating the alternating electrical fields present at the front surface of a cathode ray picture tube wherein the high-voltage signal supplied to the high-voltage terminal of the tube is tapped to extract an alternating voltage signal therefrom, and the alternating voltage signal is inverted and amplified and then applied to a suitable external electrode placed in the proximity of the picture tube. The external electrode can be a framing band, an aquadag region or a ring electrode, among other things. Furthermore, combination of these electrodes can be employed.
IPC 1-7
IPC 8 full level
H01J 29/02 (2006.01); H01J 29/00 (2006.01); H01J 29/88 (2006.01); H01J 29/98 (2006.01); H04N 9/29 (2006.01)
CPC (source: EP US)
H01J 29/003 (2013.01 - EP US); H01J 29/98 (2013.01 - EP US); H01J 2229/0015 (2013.01 - EP US)
Citation (examination)
- EP 0500349 A1 19920826 - NANAO CORP [JP]
- EP 0498589 A2 19920812 - SALCOMP OY [FI]
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
DE 4123565 C1 19920917; DE 59206213 D1 19960613; EP 0523322 A1 19930120; EP 0523322 B1 19960508; FI 922163 A0 19920513; FI 922163 A 19930117; JP H05242821 A 19930921; NO 921821 D0 19920508; NO 921821 L 19930118; US 5243262 A 19930907
DOCDB simple family (application)
DE 4123565 A 19910716; DE 59206213 T 19920323; EP 92105012 A 19920323; FI 922163 A 19920513; JP 18068692 A 19920708; NO 921821 A 19920508; US 80873891 A 19911217