Browse Prior Art Database

Common Subassembly for Color and Monochrome Cathode Ray Tubes

IP.com Disclosure Number: IPCOM000049388D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Bradley, ME: AUTHOR [+3]

Abstract

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.

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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 monochromatic CRTs.

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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