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:
Jun. 20, 1989
Filed:
Jul. 27, 1988
Applicant:
Inventors:
Misao Kokabu, Mobara, JP;
Hitoshi Nakamura, Mobara, JP;
Takashi Fujimura, Mobara, JP;
Nobuyasu Hayashi, Chiba, JP;
Assignees:
Hitachi Ltd., Tokyo, JP;
Hitachi Device Engineering Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354-1 ; 430 23 ;
Abstract
An exposure apparatus of the present invention for forming a fluorescent screen over the inner surface of the panel of a color cathode ray tube has a drive device capable of automatically aligning a short-arc mercury-vapor lamp to hold the position of the center axis within a required exposure accuracy, whereby the position of the arc center of the short-arc mercury-vapor lamp is displaced toward the center axis of the panel to correct arc variations depending upon a lighting period of the short-arc mercury-vapor lamp.