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:
Jan. 13, 1987
Filed:
Jan. 19, 1984
Johan O Hilbrink, Cincinnati, OH (US);
NCR Corporation, Dayton, OH (US);
Abstract
A field effect display system is comprised of a control system and display circuitry. The display circuitry includes an m by n array of field effect picture elements, a plurality of associated diode arrays respectively coupled to the array of field effect picture elements and diode decoder circuitry selectively coupled to the plurality of diode arrays. The control system is controlled by a microcomputer to selectively develop P-column address, N-column address and row address signals in P and N modes of operation. Drive decoder circuitry in the control system is responsive to each row address selectively generated during either a P- or an N-mode of operation for selectively causing an associated one of m drive circuits to enable all of the field effect picture elements in an associated one of m rows of field effect picture elements. During the P-mode of operation, the diode decoder circuitry is selectively responsive to the P-column addresses for selectively causing each of the selectively enabled picture elements to be electrically charged in a first direction through their respective associated diode arrays. During the N-mode of operation, the diode decoder circuitry is selectively responsive to the N-column addresses for selectively causing each of the selectively enabled picture elements to be electrically charged in a second direction through their respective associated diode arrays.