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:
Aug. 19, 2003
Filed:
Mar. 04, 2002
Hideaki Etou, Osaka, JP;
Atsushi Kato, Kyoto, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In a color picture tube, a phosphor screen is formed on an inner face of a face panel, which is formed of a plurality of phosphor lines in the form of stripes, and a color selecting electrode opposed to the phosphor screen is provided. The color selecting electrode has a plurality of apertures and bridges each separating the adjacent apertures from each other in a direction along the phosphor lines. In the vicinities of shadows of the bridges formed as a result of projection by electron beams, each of light emitting regions in which the phosphor lines emit light by irradiation with the electron beams has a part in which a wide portion of a greater width than a basic width Wb of the light emitting region is provided. Darkening of the phosphor screen can be compensated, which is caused by the shadows of the bridges shading the phosphor lines. Thus, a decrease in the luminance of the phosphor screen and picture noise that are caused by the shadows of the bridges can be suppressed.