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. 31, 1983
Filed:
Apr. 28, 1981
Mauritz L Granberg, Minneapolis, MN (US);
David G Hanson, Spring Lake Park, MN (US);
Robert L Rajala, Minneapolis, MN (US);
William G Whipple, Eagan, MN (US);
Sperry Corporation, New York, NY (US);
Abstract
A method and apparatus whereby an auxiliary yoke is used in conjunction with a CRT display to correctively deflect the electron beam to a true position within each pixel of a graphics figure, as the graphics figure is displayed on the CRT's screen. The apparatus thus increasing the display's resolution within each pixel so as to permit the smoothing of the displayed graphics figures. The improved resolution being achieved via a four bit binary position correction code, three bits of which are stored in the image memory at those memory addresses corresponding to the coordinates of the pixels that comprise the graphics figure, and one bit of which position correction code is stored at the immediately preceeding memory addresses. The entire position correction code in turn being decoded as the image memory is read and used to drive one or the other of the x and y coil pairs of the x-y auxiliary yoke.