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:
Jul. 05, 1983
Filed:
Mar. 27, 1981
Joseph H Mehaffey, Atlanta, GA (US);
Aleksander Szlam, Marietta, GA (US);
Solid State Systems, Inc., Atlanta, GA (US);
Abstract
A multiplexed liquid crystal display arrangement including a back plane (241) driven by a signal (212) derived from a common clock signal (200). The clock signal on the back plane is also provided to one input of an EXCLUSIVE OR gate (245b) the other input of which is the incoming multiplexed data. A second clock signal (211) drives the multiplexing counter (141) which in turn drives the address lines (221) of an analog multiplexer (138). Each segment of a multi-segment liquid crystal display having the common back plane (241) has attached thereto a capacitor (C1 through C64) acting as a temporary storage for the signals. A spike suppression flip-flop (247) is used to disable the multiplexer during changes on the address lines in order to suppress output spikes which occur during such changes. The period of the spike suppression pulse is selected to be short with respect to the on period of each segment in the multiplex timing.