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:
Aug. 05, 1997
Filed:
Dec. 01, 1995
Hidehiko Chimura, Kanagawa, JP;
Jun Koyama, Kanagawa, JP;
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Abstract
An active matrix liquid crystal electrooptical device consuming only a small amount of electric power without producing flicker. The electrooptical device comprises a plurality of pixels arranged in rows and columns. Each pixel has a switching element. Scanning lines for turning on and off the switching elements and signal lines to which display signals are produced are connected with the pixels. The device further includes plural signal line driver circuits. Each driver circuit produces a display signal to the corresponding signal line. Each display signal exhibits one polarity during one frame period. The polarity of the display signal produced by at least one of the driver circuits is different from the polarity of the display signal produced by the other driver circuit. The polarity is inverted every frame. The signal lines connected with any one of the driver circuits are connected with the pixels which are, in turn, connected with one of the scanning lines.