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:
Sep. 09, 1997
Filed:
Jan. 26, 1996
Seigo Togashi, Sakado, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A method of driving a two-terminal type active matrix liquid crystal display device while improving printing of image and residual image caused by the characteristics of the switching elements that change depending upon the current. The liquid-crystal display device has a plurality of data lines and scanning lines, and liquid-crystal pixels provided at the intersecting points of said data lines and said scanning lines, said liquid-crystal pixels having at least one two-terminal type switching element and being driven by a scanning signal applied to the scanning lines and by a data signal applied to the data lines. The scanning signal .phi.(n) has current application periods (27, 28, 32, 33) for flowing a current to the switching elements preceding the select periods (26, 31). The scanning signal further has holding periods after the select periods.