EP 0714115 A3 19970716 - Color display system utilizing quadrupole lenses
Title (en)
Color display system utilizing quadrupole lenses
Title (de)
Farbanzeigegerät unter Verwendung von Quadrupollinsen
Title (fr)
Dispositif d'affichage en couleurs utilisant de lentilles quadrupolaires
Publication
Application
Priority
JP 29132594 A 19941125
Abstract (en)
[origin: EP0714115A2] A color cathode ray tube has an electron gun including at least a cathode (K1,K2,K3), a control electrode (10), an accelerating electrode (20), a focus electrode (30-50) and an anode (60) spaced axially in the order named. The focus electrode includes a first focus electrode (30), a second focus electrode (40) and a third focus electrode (50), the first focus electrode (30) facing the accelerating electrode (20). A first quadrupole lens structure is formed on the first and the second focus electrode, and a second quadrupole lens structure is formed on the second focus electrode and the third focus electrode. A dynamic focus voltage is applied to the first and third focus electrodes so that the first quadrupole lens structure produces horizontally diverging and vertically focusing actions on the electron beam and the second quadrupole lens structure produces horizontally focusing and vertically diverging actions on the electron beam. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 29/50 (2006.01); H01J 29/62 (2006.01)
CPC (source: EP KR)
H01J 29/503 (2013.01 - EP); H01J 29/56 (2013.01 - KR); H01J 29/628 (2013.01 - EP); H01J 2229/4841 (2013.01 - EP)
Citation (search report)
- [PX] EP 0652583 A1 19950510 - HITACHI LTD [JP]
- [X] EP 0332469 A2 19890913 - TOSHIBA KK [JP]
- [DA] US 4728859 A 19880301 - NATSUHARA MASAO [JP], et al
- [X] YAMANE H ET AL: "AN IN-LINE COLOR CRT WITH DYNAMIC BEAM SHAPING FOR DATA DISPLAY", PROCEEDINGS OF THE SID, vol. 29, no. 1, 1988, pages 41 - 45, XP000006427
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0714115 A2 19960529; EP 0714115 A3 19970716; CN 1130302 A 19960904; JP H08148095 A 19960607; KR 960019453 A 19960617
DOCDB simple family (application)
EP 95118059 A 19951116; CN 95119692 A 19951124; JP 29132594 A 19941125; KR 19950043776 A 19951125