Indirectly-heated cathode heater structure for a cathode ray tub

Details Indirectly-heated cathode heater structure for a cathode ray tub Indirectly-heated cathode heater structure for a cathode ray tub

1994-08-31

1995-09-26

O'Shea, Sandra L.

Electric lamp and discharge devices

Electrode and shield structures

Indirectly heated cathodes

313344, 313446, H01J 120, H01J 1914, H01J 2946

Patent

active

054536570

ABSTRACT:
This invention relates to an indirectly-heated cathode heater structure comprising a heat generation section disposed inwardly of an upper portion of a sleeve for generating heat to emit thermions at an electron gun of a cathode ray tube, the heat generation section having a given calorific value being formed to have a length 25.about.33 % of the length of the sleeve, whereby heat loss at a lower portion of the sleeve during heating operation of the heater may be minimized, resulting in improving an overshoot rate of the heater.

REFERENCES:
patent: 4000435 (1976-12-01), Jariwala
patent: 4825119 (1989-04-01), Penelon
patent: 5164631 (1992-11-01), Lee
patent: 5313133 (1994-05-01), Park

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