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. 10, 1999
Filed:
Jul. 07, 1997
Applicant:
Inventor:
Toshiyuki Ogura, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
315371 ; 31536818 ; 31536826 ; 315370 ; 315403 ;
Abstract
A system to correct and adjust horizontal-direction pincushion and barrel distortions of scanning lines caused at upper and lower portions of a picture screen of a cathode-ray tube includes a pair of coils provided at a neck portion of the cathode-ray tube. An orbit of an electron beam made incident on a deflection center is shifted in the upper and lower directions by a magnetic field generated by the coils, thereby correcting distortion of scanning lines at upper and lower portions of a display screen of the cathode-ray tube.