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. 12, 2000
Filed:
Dec. 17, 1997
Yasushi Suzuki, Sayama, JP;
Citizen Watch Co., Ltd., Tokyo, JP;
Abstract
A method simultaneously drives a plurality of lines of a display employing an antiferroelectric liquid crystal material. The polarity of the start of a waveform applied to a first one of the simultaneously selected lines is opposite to the polarity of the starts of waveforms applied to the other simultaneously selected lines. Each select period is divided into n sections. A data waveform applied to any one of data electrodes (column electrodes) of the display in synchronization with the select waveforms is determined according to column vectors of a unit matrix of n rows by n columns. The sign of a first one of the n column vectors is inverted. A maximum among voltages applied to pixels of the display must be sufficiently larger than the threshold of the ferroelectric liquid crystal material. The absolute value of the threshold is set between the sum of and the difference between the absolute values of the select and data waveforms.