Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield
Patent
1988-08-31
1989-11-28
Yusko, Donald J.
Electric lamp and discharge devices
Cathode ray tube
Shadow mask, support or shield
445 37, 445 58, H01J 2907, H01J 902
Patent
active
048840041
ABSTRACT:
A color cathode-ray tube comprises an evacuated envelope having an electron gun for producing at least one electron beam and, preferably three beams, a phosphor screen and a shadow mask adjacent to the screen. The mask has an improved heat dissipative, electron reflective coating on its electron gun-facing surface to minimize the effects of overall mask doming and blister warpage. The coating comprises a compound selected from the group consisting of bismuth (tri)oxide-potassium silicate and tungsten-potassium silicate. A method of making and applying the coating also is disclosed.
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Bartch Donald W.
Deal Samuel B.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
O'Shea Sandra L.
RCA Licensing Corp.
Tripoli Joseph S.
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