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. 13, 1987
Filed:
Oct. 01, 1985
Hidetoshi Yamazaki, Fukaya, JP;
Masatsugu Inoue, Fukaya, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A color picture tube comprises a tube envelope having a tube axis and including a neck section, a funnel section and a panel section, an electron gun assembly for emitting at least three electron beams, and a shadow mask assembly disposed in the tube envelope adjacent to the phosphor screen. The shadow mask assembly includes a shadow mask and a frame. The shadow mask has a plate portion which is formed having a curved surface with a dome-like shape opposing the phosphor screen and regularly arranged apertures each for allowing the three electron beams to pass through, and a skirt portion extending from the peripheral portion of the plate portion along the tube axis. The frame surrounds the peripheral portion of the skirt portion of the shadow mask, and the frame and the skirt portion of the shadow mask are coupled to each other by welding at a plurality of locations. The frame is made of a metal material having a thermal expansion coefficient higher than the shadow mask.