EP 0655763 A1 19950531 - Electron gun for a color picture tube.
Title (en)
Electron gun for a color picture tube.
Title (de)
Elektronenkanone für eine Farbbildröhre.
Title (fr)
Canon à électrons pour tube image couleur.
Publication
Application
Priority
KR 930026168 A 19931130
Abstract (en)
The gun according to present invention has a triple electrodes part as a source of the electron beam, and prefocusing and main lens part for focusing and accelerating the beam. The prefocusing lens part includes a plurality of focusing electrodes (21,22,23,24) for forming at least one quadrapole lens in which the intensity of vertical lens is weaker than that of horizontal lens. According to the present invention, the effect of the spherical aberration to the beam entering the main lens can be reduced. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 29/48 (2006.01); H01J 29/50 (2006.01)
CPC (source: EP KR)
H01J 29/50 (2013.01 - KR); H01J 29/503 (2013.01 - EP); H01J 2229/4841 (2013.01 - EP)
Citation (search report)
- [X] US 4641058 A 19870203 - KOSHIGOE SHINPEI [JP], et al
- [PA] US 5281896 A 19940125 - BAE MIN-CHEOL [KR], et al
- [A] GB 2224883 A 19900516 - SAMSUNG ELECTRONIC DEVICES [KR]
- [A] DE 4233955 A1 19931125 - SAMSUNG ELECTRONIC DEVICES [KR]
Designated contracting state (EPC)
CH DE ES FR GB IT LI NL
DOCDB simple family (publication)
EP 0655763 A1 19950531; CN 1108798 A 19950920; JP H0817359 A 19960119; KR 950015511 A 19950617
DOCDB simple family (application)
EP 94118716 A 19941128; CN 94113073 A 19941129; JP 29539794 A 19941129; KR 930026168 A 19931130