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. 05, 1988
Filed:
Aug. 27, 1985
Morio Ohta, Higashiyamatoshi, JP;
Shizuo Tsuchiya, Higashiyamatoshi, JP;
Hideaki Inoue, Higashiyamatoshi, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Casio Electronics Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A method of driving a liquid crystal recording device comprises applying a drive signal to liquid crystal micro shutters defined at the intersection of common electrodes that are normal to signal electrodes. The drive signal is a signal experienced by a microshutter as a result of the application of a selected signal to the common electrode and the application of a recording signal to the signal electrode. Both the selected and recording signals contain components of frequencies grater and less than a specified frequency which causes the dielectric anistotropy of the liquid crystal to disappear. A drive signal which opens or closes microshutters for a selected period of time includes a signal whose frequency is lower than said specified frequency, and superposed waveform obtained when the signal whose frequency is loser than the specified frequency is superposed upon a signal whose frequency is higher than the specified frequency. A driving waveform which reversely sets the microshutters open or closed for the selected period of time is formed of a signal including a frequency higher than the specified frequency and a zero frequency signal. As a consequence of the application of signals of this nature to the microshutters, the temperature characteristics of the liquid crystal microshutters are improved.