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:
Jul. 21, 1992
Filed:
May. 31, 1990
Katsuei Morohashi, Menuma, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a method of manufacturing a color cathode ray tube, a photosensitive layer is formed on a inner surface of a panel and a shadow mask is mounted in the panel. The photosensitive layer is exposed to a light beam which is emitted from a light source and passes through a lens system, a shutter and apertures of the shadow mask to form a pattern corresponding to the apertures of the shadow mask in an exposure step. In the exposure step, the shutter is moved along the inner surface of the panel and the light source is also moved in synchronism with the movement of the shutter. Thus, the light beam is so shifted as to satisfy the .gamma.-.DELTA.p characteristic of the cathode ray tube, which reflects the angle of deflection .gamma. of the electron beam and the corresponding displacement of the center (F) of the deflection .DELTA.p from where the center of deflection would be when the angle of deflection is zero.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile