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A common cathode ray tube (CRT) bulb, with an optical anti-reflection coating on its face plate, could be used in the manufacture of both color and monochromatic CRTs.
English (United States)
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Common Subassembly for Color and Monochrome Cathode Ray Tubes
A common cathode ray tube (CRT) bulb, with an optical anti-reflection
coating on its face plate, could be used in the manufacture of both color and
The figure shows a cross-section of a typical color CRT. The only difference
in the monochromatic case would be the omission of the blue and red
components in the phosphor layer 10 and the mesh portions 12 of the shadow
mask. Only the shadow mask frame 14 would be used instead of the complete
mask. Frame 14 serves via 15 to insure high voltage continuity between the
conductive layer 16 on the interior of funnel and the face plate assembly
aluminization 18. This is in place of the continuous aluminization of the interior of
the funnel and the back of the face plate used in mono tubes but incompatible
with color tube manufacturing processes.
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