EP 0319402 B1 19920610 - USE OF AN ELECTRON GUN FOR A CATHODE-RAY TUBE
Title (en)
USE OF AN ELECTRON GUN FOR A CATHODE-RAY TUBE
Publication
Application
Priority
FR 8716635 A 19871201
Abstract (en)
[origin: EP0319402A1] Electron gun for cathode ray tubes comprising in succession an electron source electrode or cathode (1), a control electrode or Wehnelt (2), a primary-acceleration electrode or anode brought to an adjustable voltage (3) and at least one focusing or secondary-acceleration electrode (4), in which, between the primary-acceleration electrode (3) and the focusing or secondary-acceleration electrode (4), there is inserted an additional electrode (30) which is brought, whilst operating, to a fixed polarising voltage (V30), this electrode forming with the anode electrode (3) a low-power electrostatic lens, and forming with the secondary-acceleration electrode (4) a high-power electrostatic lens. <??>Application to cathode ray tubes. <IMAGE>
IPC 1-7
IPC 8 full level
H01J 29/48 (2006.01)
CPC (source: EP US)
H01J 29/488 (2013.01 - EP US)
Designated contracting state (EPC)
DE GB NL
DOCDB simple family (publication)
EP 0319402 A1 19890607; EP 0319402 B1 19920610; DE 3871918 D1 19920716; DE 3871918 T2 19921224; FR 2623939 A1 19890602; FR 2623939 B1 19900309; JP H01186539 A 19890726; US 4914724 A 19900403
DOCDB simple family (application)
EP 88403008 A 19881130; DE 3871918 T 19881130; FR 8716635 A 19871201; JP 30511488 A 19881201; US 27666888 A 19881128