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. 02, 1996
Filed:
Aug. 15, 1994
Yukihiro Tsuda, Hiratsuka, JP;
Akira Mori, Hiratsuka, JP;
Kabushiki Kaisha Komatsu Seisakusho, Tokyo, JP;
Abstract
A drive circuit, for use with a transmissive scattered liquid crystal display device, prevents a residual image caused by a high speed display switching, while having a reduced size and fewer parts, thereby improving reliability. The drive circuit comprises a shift register (3a), a first gate for functioning as an AND circuit (2a), a second gate for functioning as an exclusive OR circuit (2b), and a switching device (7) with a higher withstand voltage than a logic signal. These constructional elements are formed within an IC. A logic signal for driving the liquid crystal display device is input to the second gate (2b). The output of the buffer (8) is connected to a totem pole drive circuit (10) for driving a common electrode (C) with a high voltage (HV) which is synchronized with the logic signal.