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. 06, 1999
Filed:
Jul. 17, 1996
Kunio Enami, Shiga-ken, JP;
Takatoshi Tomooka, Shiga-ken, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The quality of an image is improved even if the duration of data voltage is short for application. A gate line driver 34 sequentially applies the gate voltage to a number of gate lines G1-Gm by predetermined duration. Data lines are grouped into four groups each consisting of n lines (d1A-dnA: group A, d1B-dnB: group B, d1C-dnC: group C, and d1D-dnD: group D). A data line driver 40 and a multiplexer 38 sequentially perform for the data line groups A-D in the above predetermined duration application of data voltage to each data line in a predetermined data line group. A precharge controller 44 and a voltage switching circuit 46 apply to each of the data line groups A-D, through a transistor 42, a precharge voltage (+V.sub.1 or -V.sub.1) with the same polarity with that of data voltage being applied next time during the time from previous application of the data voltage to next application of it.