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:
Jan. 24, 1978
Filed:
Jul. 30, 1976
Masahiro Nishizawa, Mobara, JA;
Takehiko Ueyama, Mobara, JA;
Hitachi, Ltd., , JA;
Abstract
A method for manufacturing a fluorescent screen of a color picture tube by the steps of forming a coating of opto-hardening material on the inner surface of the faceplate of the panel of a color picture tube and exposing to a light and hardening selectively the coating thereby to form a matrix of stripes of the opto-hardening material, in which the selective exposure is performed by projecting a light derived from a light source having a predetermined width from each of at least two positions which are separated from the inner surface of the faceplate by a predetermined distance and also separated from each other onto the coating of the opto-hardening material formed on the faceplate through a slot of a predetermined width of a mask located between the inner surface of the faceplate and the light source, whereby the width of the stripe changes little even when the luminous intensity of the light source changes.