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:
Jun. 09, 1981
Filed:
Jun. 26, 1979
Robert H Lacy, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A horizontally oriented curve is produced on a raster-type cathode-ray tube display by storing curve data words in a memory. The curve data word is representative of the height at which a dot is to be placed on the cathode-ray tube screen. The horizontal position of the dot is dictated by the position of the data word in the memory. The data words are read out of the memory in response to a horizontal address and the data words are compared to a vertical address. Where the data word is equal to the vertical address a dot is illuminated at a particular horizontal and vertical position. The curve is updated by writing a new data word into the memory and moving all of the existing data words one position in the memory. The data in the reconfigured memory is then displayed. Provision is also provided for filling in vertical gaps in the horizontal curve to provide a smooth curve.