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:
Feb. 21, 2006
Filed:
Oct. 04, 2001
Toshihiro Yanagi, Taki-gun, JP;
Kouji Kumada, Tenri, JP;
Takashige Ohta, Yamatokoriyama, JP;
Katsuya Mizukata, Shijonawate, JP;
Toshihiro Yanagi, Taki-gun, JP;
Kouji Kumada, Tenri, JP;
Takashige Ohta, Yamatokoriyama, JP;
Katsuya Mizukata, Shijonawate, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
In an active matrix type display device, a signal voltage is applied from a signal line driving circuit via an active element such as a TFT to display electrodes on a matrix substrate, and a common voltage is applied to a counter electrode on a facing substrate so that the common voltage is shared by respective display cells. A level of the common voltage is switched in every refresh period of a different length. Thus, it is possible to appropriately set a value of the common voltage which is a reference for specifying an effective voltage of positive polarity and an effective voltage of negative polarity according to the refresh periods. As a result, even when the refresh periods of a different length exist in a mixed manner, it is possible to equalize the effective voltage of positive polarity and the effective voltage of negative polarity so as to suppress an occurrence of a flicker.