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. 24, 2009
Filed:
Mar. 10, 2006
Shoichiro Matsumoto, Gifu, JP;
Shoichiro Matsumoto, Gifu, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A variation in a display image and duration of a residual image are reduced to improve quality of display of an active matrix type display device. A control circuit sequentially outputs a pre-charge pulse signal PCGand a storage capacitor control pulse signal SCin synchronization with a falling edge of a vertical start pulse signal STV. A pre-charge TFT in a pixel in a first row is turned on according to the pre-charge pulse signal PCG. As a result, a source and a gate of a driver TFT are short-circuited, both an electric potential at the gate and an electric potential at the source of the driver TFT become a positive power supply electric potential PVdd, and the driver TFT is turned off. After that, the storage capacitor control pulse signal SCrises to a high level, and the electric potential at the gate of the driver transistor is raised by capacitive coupling. With this, electric characteristics of the driver TFT are initialized.