Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1973-11-02
1979-01-16
Corbin, John K.
Electric lamp and discharge devices
Cathode ray tube
Screen
313472, 313474, H01J 2926, H01J 3120
Patent
active
041351126
ABSTRACT:
A color cathode ray tube screen structure, having means for enhancing the absorption of ambient light and providing improvement in the contrast of the image display, is comprised of three superimposed substantially continuous window-defining layers of optical filter materials. The primary, secondary and tertiary filter layers have discretely disposed window areas formed therein to expose a pattern of filter areas representing the respective filter materials. The filter windows are of a shaping similar to that of the apertures in a spatially related pattern mask member. Each window exhibits a uniform periphery free of indentations, being so defined by a uniform opaque interstitial encompassment homogeneously made up of the three distinct layers of filter materials. Disposed over the filter windows is a patterned screen of cathodoluminescent phosphor elements, which upon electron excitation produces color-emissions that are colormetrically related to the respective filter windows therebeneath.
REFERENCES:
patent: 3695871 (1972-10-01), Lange
patent: 3748515 (1973-07-01), Kaplan
Fisher Mahlon B.
Gallaro Anthony V.
Williams George N.
Buffton Thomas H.
Corbin John K.
GTE Sylvania Incorporated
Hille Rolf
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