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:
Mar. 09, 1999
Filed:
Dec. 19, 1996
Denso Corporation, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
The present invention provides a liquid crystal display device having a matrix electrode structure in which flicker of picture images displayed on a panel is invisible. Scanning electrodes of the matrix are driven by alternating voltages which include voltages for holding picture images displayed on the panel. Refresh pulse voltages higher than the holding voltages are imposed on the scanning electrodes every time the polarity of the holding voltages is reversed, so that the brightness of the picture images does not change before and after the reversing of the holding voltage polarity. In case an anti-ferroelectric liquid crystal is used as the liquid crystal, the refresh pulse voltages which cause transitions of the liquid crystal states between positive ferroelectric and negative ferroelectric states and do not cause the transition from an anti-ferroelectric state to the ferroelectric states are imposed on the scanning electrodes.