EP 0250053 A3 19900328 - AGING PROCESS FOR CATHODE RAY TUBES
Title (en)
AGING PROCESS FOR CATHODE RAY TUBES
Publication
Application
Priority
US 87615086 A 19860619
Abstract (en)
[origin: EP0250053A2] An improved aging process for a cathode ray tube in which the main focusing grid (G3) is aged at a potential below that of the G2 grid, resulting in significantly reduced incidence of dark center cathode. In a typical example of the process the G3 grid is at a voltage of at least 100 volts, which voltage is at least 50 volts less than the G2 grid voltage.
IPC 1-7
IPC 8 full level
H01J 9/44 (2006.01)
CPC (source: EP KR)
H01J 9/44 (2013.01 - KR); H01J 9/445 (2013.01 - EP)
Citation (search report)
- [A] JP S61110935 A 19860529 - TOSHIBA CORP
- [A] US 3966287 A 19760629 - LILLER PAUL RICHARD
- [A] PATENT ABSTRACTS OF JAPAN, unexamined applications, E field, vol. 6, no. 107, June 17, 1982 THE PATENT OFFICE JAPANESE GOVERNMENT page 136 E 113
Designated contracting state (EPC)
DE ES FR GB NL
DOCDB simple family (publication)
EP 0250053 A2 19871223; EP 0250053 A3 19900328; CA 1304774 C 19920707; JP S6324530 A 19880201; KR 880001015 A 19880330
DOCDB simple family (application)
EP 87201145 A 19870616; CA 540074 A 19870618; JP 15152487 A 19870619; KR 870006077 A 19870616