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:
Aug. 04, 1998
Filed:
Jun. 05, 1995
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid crystal apparatus includes a liquid crystal device having 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 having a threshold voltage varying depending on a voltage pulse width disposed so as to form a picture element at each intersection of the scanning electrodes and the signal electrodes. The electrodes are driven by (a) applying a scanning selection signal and a scanning non-selection signal to the scanning electrodes, (b) applying data signals to the signal electrodes so as to apply a voltage to a selected picture element at an intersection of a selected scanning electrode receiving the scanning selection signal and a selected signal electrode, the voltage applied to the selected picture element being at least two times a voltage applied to a non-selected picture element at an intersection of a non-selected scanning electrode receiving the scanning non-selection signal and a selected or non-selected signal electrode, (c) periodically applying the scanning selection signal to the scanning electrodes, and (d) setting a voltage level of the voltage according to a local environmental temperature.