EP 0641007 A2 19950301 - Direct-heating-type dispenser cathode structure.
Title (en)
Direct-heating-type dispenser cathode structure.
Title (de)
Direkt beheizte Vorratskathodenstruktur.
Title (fr)
Structure de cathode à réserve du type à chauffage direct.
Publication
Application
Priority
- KR 930017566 A 19930831
- KR 930017567 A 19930831
Abstract (en)
A direct heating type-cathode structure is provided with filaments (200) which are secured to at least three points on the side surfaces of a porous pellet (100) formed of tungsten or molybdenum, and the cathode material thereof includes an alkaline earth metal oxide of barium. The thus-structured direct-heating-type cathode structure requires a temperature of only 950 DEG C to 980 DEG C to obtain the current density of 10A/cm<2> and is suitable for use in a color cathode ray tube and specifically in wide-screen televisions and industrial cathode ray tubes. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0641007 A2 19950301; EP 0641007 A3 19950621; CN 1099903 A 19950308; JP H0785775 A 19950331
DOCDB simple family (application)
EP 94300660 A 19940128; CN 94101512 A 19940205; JP 4184294 A 19940215