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:
Jul. 04, 1989
Filed:
Dec. 30, 1987
Applicant:
Inventor:
Kirk Oliver, Forest Park, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
315371 ;
Abstract
Top and bottom pincushion correction signals with separately controllable first and second order components are provided. A switching signal, developed from the vertical ramp, operates a plurality of switches for selectively applying the top and bottom correction signals to the carrier input of a multiplier. A trapezoidal correction signal is also applied to this multiplier input. The modulator input of the multiplier is supplied with the vertical ramp. A parallellogram correction pulse is combined with the output of the multiplier. The resultant, generally bow tie-shaped, raster correction signal is applied to the vertical deflection means.