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:
May. 19, 1998
Filed:
Nov. 30, 1994
Kyung-ho Kim, Taeku, KR;
Francis Joseph Campbell, Yardley, PA (US);
Orion Electric Co., Ltd., Kyungsangbuk-Do, KR;
Abstract
The present invention discloses an improved electron gun for a color picture tube. The present gun having a triple electrode part, a prefocusing lens part for preliminarily focusing and accelerating the electron beam from the triple electrode part, and a main lens part for finally focusing and accelerating the beam from the prefocusing lens part, is characterized in that the prefocusing lens part comprises a plurality of focusing lenses for forminig at last one quadrapole lens, and two different focusing voltages each of which being dynamically changed synchronized with the deflection signal, are selectively applied to each focusing electrode. Thus, a uniform beam section can be obtained all over the screen.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile