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. 09, 1998
Filed:
Nov. 30, 1994
Hyo-jong Yoon, Taeku, KR;
Francis Joseph Campbell, Yardley, PA (US);
Orion Electric Co., Kyungsangbok-do, KR;
Abstract
The present invention discloses an improved electron gun for a color picture tube including a main lens having a first rim electrode having a beam passing plane with holes in an incident side of the electron beam and a second rim electrode facing the first rim electrode and having a beam passing plane with holes in a departing side of the beam. A focusing electrode having a beam passing plane with holes in departing side of the beam for forming compensating astigmatism quadrupole lenses in conjunction with the first rim electrode to compensate for the astigmatism of the main lens is positioned adjacent to the first rim electrode of the main lens. Astigmatism formed between the first and second rim electrode of the main lens electrodes can be reduced by the compensating astigmatism of the quadrupole lenses.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile