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. 24, 1983
Filed:
Dec. 10, 1979
Robert E Wisnieff, Weston, CT (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A circuit for use with an AC plasma panel to cause gray shade or brightness variation at the discrete points on a displayed rastor by varying the number of emitted light pulses within a flicker period. The gray scale range is divided into a predetermined number of levels, each of which corresponds to a particular gray shade. The gray shade level for all of the discrete points along a row of rastor information is stored in binary form in recirculating shift registers. All of the points along each column are addressed simultaneously and the data bits from the recirculating shift registers are used to clock either erase pulses, write pulses, as the case may be, to all of the rows simultaneously as each column is sequentially addressed. Accordingly, by addressing all of the row electrodes simultaneously, all of the discrete sites can be addressed a sufficient number of times within a flicker period to minimize any rastor flicker.