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:
Feb. 06, 1996
Filed:
Dec. 03, 1993
Tomio Tanaka, Hachioji, JP;
Katsuhito Sakamoto, Yokohama, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Abstract
A liquid crystal display element includes one substrate on which pixel electrodes and TFTs connected to the pixel electrodes are arranged in a matrix form, the other substrate on which a counter electrode opposing the pixel electrodes is formed, and a ferroelectric liquid crystal sealed between the substrates and having a helical pitch smaller than a distance between the substrates. A row driver is connected to the TFTs to sequentially turn on the active elements. A column driver applies an initializing voltage consisting of first and second reset pulses for sequentially setting the ferroelectric liquid crystal in the first and second aligned states and a write voltage changing in accordance with the display gradation levels to the pixel electrodes through the ON active elements, thereby performing gradation display.