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:
Nov. 30, 1999
Filed:
Oct. 21, 1997
Applicant:
Inventors:
Hyun Cheol Kim, Kyungsangbuk-do, KR;
Gyeong Sang Lee, Kyungsangbuk-do, KR;
Sung Gi An, Kyungsangbuk-do, KR;
Assignee:
LG Electronics Inc., , KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313414 ; 313412 ; 313460 ;
Abstract
A focusing electrode in an electron gun for a color cathode ray tube or high definition industrial picture tube includes a first and second focusing electrodes. A recess portion in one end of the first focusing electrode is oriented to face burring parts of the second focusing electrode. An electron beam and a surrounding portion pass through holes in the first focusing electrode to reduce the space between the first and second focusing electrodes. This improves the static convergence drift.