The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1998
Filed:
Mar. 11, 1997
Dong Ky Shin, Kyungsangbuk-do, KR;
Bok Soo Lee, Kyungsangbuk-do, KR;
Sang Youl Yoon, Kyungsangbuk-do, KR;
Orion Electric Co., Ltd., Kyungsangbuk-do, KR;
Abstract
The method of electrophotographically manufacturing a screen on an interior surface of a faceplate for a CRT, according to the present invention comprises the steps of first-coating the faceplate with a volatilizable conductive layer, second-coating the conductive layer with the first photoconductive layer including a dye sensitive to ultraviolet rays, third-coating the ultraviolet-photoconductive layer with a second photoconductive layer including a dye sensitive to visible light, charging the whole area of the second photoconductive layer by exposing the whole surface of the second photoconductive layer to visible light while applying a suitable DC voltage between the conductive layer and the second photoconductive layer, and exposing selected areas of said first photoconductive layer to ultraviolet rays through a shadow mask to discharge the charge from the selected areas of the first photoconductive layer. Then, in developing a uniform density of the screen structure material is obtained.