Apparatus and method for manufacturing a screen assembly for...

Details Apparatus and method for manufacturing a screen assembly for... Apparatus and method for manufacturing a screen assembly for...

H - Electricity

01

J

H01J 9/227 (2006.01) G03G 15/06 (2006.01) G03G 15/08 (2006.01) H01J 9/22 (2006.01)

Patent

CA 2067392

An apparatus for electrophotographically manufacturing a luminescent screen assembly on a substrate (18), for use within a CRT includes a developer for developing a photoconductive layer (34), having a latent image thereon, with dry-powdered, trib- oelectrically-charged screen structure materials (48, 48'). The photoconductive layer (34) overlies a conductive layer (32) in con- tact with the substrate (18). A grid-developing electrode (44) is located at a distance from the photoconductive layer that is large relative to the smallest dimension of the latent image. The electrode is biased with a suitable potential, to influence the deposition of the charged screen structure materials onto the latent image on the photoconductive layer. A method for electrophotographical- ly manufacturing the screen assembly utilizing the grid-developing electrode is also disclosed.

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