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:
Jan. 04, 2000
Filed:
Apr. 04, 1997
Ken Kawahata, Miyagi-ken, JP;
Tatsumi Fujiyoshi, Miyagi-ken, JP;
Frontec Incorporated, Miyagi-Ken, JP;
Abstract
To provide a liquid crystal display making it possible to decrease the number of signal lines to avoid narrowing the pitch of the terminal portion of a data driver and to decrease power consumption and cost. Control lines CA and CB are used which are arranged in parallel with signal lines Dj on both sides of each signal line Dj to switch on/off switching devices T.sub.CA and T.sub.CB connected in series with the switching device T.sub.G of each pixel switched on/off by control signals in these control lines CA and CB and selects pixels in which image data is written. In this case, the level of a control signal is changed to H/L for each field or each horizontal scanning line and moreover, the polarity of an image signal to be supplied to the signal line Dj is properly changed. Furthermore, a cancel signal for controlling fluctuation in counter electrode potentials is superimposed on a control signal.