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. 11, 1987
Filed:
Mar. 06, 1985
Applicant:
Inventors:
Paul A Beaven, Romsey, GB;
Dave A Canton, Romsey, GB;
Nick B Sargeant, Eastleigh, GB;
Tom H Snagge, Bramdean, Nr. Aylresford, GB;
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340703 ; 340747 ; 340748 ;
Abstract
A graphics display apparatus employing a raster scanned cathode ray tube uses a refresh buffer constituted by a coded alphanumeric buffer and an associated character generator for displaying alphanumeric characters and other symbols and an all-points-addressable buffer for displaying graphics. Serialized data from the two buffers are mixed in a mixer under control of at least one control bit (attribute) stored in the coded buffer to provide a composite pel-representing bit stream supplied to the cathode ray tube.