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:
Dec. 22, 1992
Filed:
Sep. 19, 1991
Seikosha Co., Ltd., Tokyo, JP;
Abstract
A method of driving an active matrix type liquid crystal display unit of the type including a plurality of liquid crystal layers, a plurality of switching elements, a plurality of pixel electrodes each connected between a liquid crystal layer and a switching element, a common electrode connected to the liquid crystal layers, a plurality of stick capacitive elements each connected to a pixel electrode, and a plurality of scanning lines each connected to a switching element, the method including the steps of selectively turning on the switching elements by applying selection signals to the scanning signal lines of the active matrix type liquid crystal display unit; supplying picture signals to picture signal lines connected with the pixel electrodes through the switching elements; and providing an alternating voltage as an integral fraction of a horizontal interval of a picture frame as at least a common voltage at the common electrode and/or a stick capacitor voltage supplied to the capacitive elements, so as to provide that the ratio of the change in liquid crystal light transmittance T to the change in picture signal voltage V.sub.SIG is smaller than the ratio of the change in liquid crystal light transmittance T to the change in effective voltage applied to a respective liquid crystal layer.