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. 28, 1988
Filed:
Mar. 18, 1987
Katsuhiro Hinotami, Shijonawate, JP;
Shunichi Kishimoto, Kaizuka, JP;
Goro Hamagishi, Toyonaka, JP;
Masahiko Miyazaki, Osaka, JP;
Shinji Yoshiyama, Daito, JP;
Sanyo Electric Co., Ltd., Moriguchi, JP;
Abstract
A flat cathode-ray tube has a tubular glass body comprising a tubular neck portion, a flat funnel portion, a flat box-shaped head portion, an electron gun housed in the neck portion, and a fluorescent screen at the head portion. At least the funnel portion is made entirely of a flat glass plate. A deflection yoke, mounted on the junction of the neck and funnel portions, comprises a core having at its funnel-side end an opening approximately rectangular with substantially straight upper and lower sides and gently outwardly bulging arcuate opposite lateral sides. The core's inner surface, defining an opening, is continuously reducing in size from the funnel side toward the neck portion conforming with the tapered shape of the funnel portion. The yoke further comprises a pair of vertical deflection coils wound around an upper and a lower portion of the core. A pair of horizontal deflection coils, each have horizontal portions extending at least along the opposite sides of the funnel portion. A front-end bridge portion extends from the horizontal portion approximately perpendicular thereto and is positioned on the upper or bottom surface of the funnel portion in a direction perpendicular to the electron beam. The horizontal deflection coils are arranged inside the core at opposite sides symmetrically with respect to a horizontal plane of passage of the beam. At least the horizontal deflection coils have their inner surfaces intimately contacted with the outer surface of the funnel portion.