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. 08, 1990
Filed:
May. 11, 1989
Applicant:
Inventors:
John E Bray, Guelph, CA;
David Poos, Grimsby, CA;
Assignee:
NCR Corporation, Dayton, OH (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382 56 ; 340793 ;
Abstract
A method and apparatus for displaying a high resolution image on a low resolution CRT with a minimal loss of information. Even rows of a source or matrix of binary pixels are stored in an 'even' video RAM and odd rows are stored in an 'odd' video RAM at addresses corresponding to the locations of the binary pixels within the matrix. In a preferred embodiment, a group of four pixels corresponding to a portion of the image is converted to a single gray value which is used to control the intensity of the beam control within the CRT.