Radiation imagery chemistry: process – composition – or product th – Producing cathode-ray tube or element thereof – Using specified radiation-sensitive composition other than a...
Patent
1993-03-19
1994-08-23
Rosasco, Steve
Radiation imagery chemistry: process, composition, or product th
Producing cathode-ray tube or element thereof
Using specified radiation-sensitive composition other than a...
430 23, 430 29, G03C 500
Patent
active
053406745
ABSTRACT:
A luminescent screen assembly for a CRT is made by first coating the interior surface of a faceplate panel with a photoconductive layer which overlies a conductive layer. A multiplicity of red-, green- and blue-emitting phosphor screen elements are then deposited in color groups, in a cyclic order, onto the interior surface of the panel. A negative charge is then established on the photoconductive layer. The charge is weakened in the areas where the photoconductive layer underlies the phosphor screen elements, but unaffected in the open areas separating the phosphor screen elements. The charged, open areas of the photoconductive layer are discharged by flood illumination and reversal developed by depositing thereon particles of light-absorptive matrix material having a triboelectric charge of the same polarity as the charge established on the photoconductive layer. The novel process provides a high opacity matrix.
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Ehemann, Jr. George M.
Moscony John J.
Coughlin Jr. Vincent J.
Irlbeck Dennis H.
Rosasco Steve
Thomson Consumer Electronics Inc.
Tripoli Joseph S.
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