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:
Nov. 07, 2000
Filed:
Nov. 28, 1997
Asahi Glass Company Ltd., Tokyo, JP;
Optrex Corporation, Tokyo, JP;
Abstract
A method of driving a picture display device having an N number (N is an integer of not less than 2) of scanning electrodes and a plurality of data electrodes and being capable of optically responding to an effective value of a voltage applied to a pixel, which includes dividing the scanning electrodes into an M number of subgroups each having L rows, and applying voltages based on signals formed by expanding time-sequentially column vectors of an orthogonal matrix (A) having L rows to the scanning electrodes in each of the subgroups in order to select each of the subgroups together, changing, every time when a selection pulse is applied, the subgroups to which the selection pulse is applied, wherein L is 8 or less and N is 200 or more; the polarities of scanning voltages and data voltages are inverted with a periodicity of S times (S is a natural number) of a selection pulse width, and S is so determined that when an integer portion in the quotient of M/S is an even number, a remainder b satisfies S/b<12, and when an integer portion in the quotient of M/S is an odd number, a remainder b satisfies S/(S-b)<12.