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. 07, 1977
Filed:
Sep. 15, 1975
Peter Dinh-Tuan Ngo, Colts Neck, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A matrix array of liquid crystal cells is defined by overlapping pluralities of row and column conductors confining a layer of liquid crystal material. Each row conductor is connected through a bilateral threshold switch to one side of a source of periodic alternating polarity sustain signals, and the column conductors are sequentially connected to the other side of the source. When an initial charge is deposited on selected ones of the capacitors forming the liquid crystal cells, the series combination of the resulting stored voltage and the sustain signals is sufficient to exceed the threshold of the bilateral switch, thereby connecting the previously selected cells to the source of alternating source on a column-by-column basis so as to recharge the previously selected cells. Since charged cells exhibit differing electro-optic properties from uncharged cells, a graphical image may be generated and stored without the need for information-bearing refresh signals.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile