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:
Apr. 28, 1998
Filed:
Sep. 14, 1993
Jun'ichi Taguchi, Sagamihara, JP;
Hiroyuki Mano, Chigasaki, JP;
Toshio Tanaka, Yokohama, JP;
Koichi Sano, Yokohama, JP;
Shigeyuki Nishitani, Ebina, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In order to realize multi-level gradation representation with reduced crosstalk in a display apparatus of STN method, one horizontal interval is divided uniformly by the bit length n of a gradation level display in a display apparatus of STN method having a display panel of simple matrix type and having display luminance depending upon the root-mean-square value of applied voltage. Each of sections resulting from division is associated with a display bit. The applied voltage value of the display panel in each divisional section is adjusted so that the root-mean-square voltage value difference on a divisional section may become the density difference meant by the display bit. Since time is divided into nearly equal n parts to represent a gradation level, the minimum time interval resulting from division becomes longer that of the conventional technique. Since the frequency band in use is narrowed, the crosstalk is reduced. As a result, false images and flicker on the display screen can be suppressed.