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. 09, 1997
Filed:
Jun. 05, 1995
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal apparatus comprises a liquid crystal device comprising a group of scanning electrodes and a group of signal electrodes intersecting each other to form an electrode matrix, and a chiral smectic liquid crystal disposed so as to form a picture element at each intersection of the scanning electrodes and the signal electrodes. Drive means is also provided for: (a) applying a scanning selection signal and a scanning non-selection signal to the scanning electrodes, the scanning selection signed comprising a voltage of one polarity and and a voltage of the other polarity, respectively with reference to a voltage level of the scanning non-selection signal, and being sequentially applied to the respective scanning electrodes; (b) in a period of applying the one or the other polarity, applying signals including a first signal and a second signal to the signal electrodes for causing the one or another orientation state of the chiral smectic liquid crystal; (c) applying to picture elements a DC bias voltage equal to a voltage difference between the voltage level of the scanning non-selection signal and a voltage applied to a signal electrode not receiving the data signal; and (d) periodically applying the scanning selection signal to the scanning electrodes.