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. 11, 2005
Filed:
Sep. 22, 2003
Takayoshi Yoshida, Yonezawashi, JP;
Takayoshi Yoshida, Yonezawashi, JP;
Tohoku Pioneer Corporation, Tendo, JP;
Abstract
Provided is a device for driving an active matrix type luminescent display panel, which can effectively apply a reverse bias voltage to a luminescent element via a drive TFT. A luminescent elementconstituting one pixelis light-up driven by a control TFTand a drive TFT. A serial circuit of the drive TFTand the luminescent elementis connected to a power source circuit via a switch Sand a switch S, whereby a state where a forward-directional current is supplied to the luminescent element or a state where a reverse bias voltage is applied to the luminescent element is selected. By using, as the control TFTand the drive TFT, TFT of the channel type of that is the same, it is possible to maintain the drive TFTto be in an 'on' state when having applied a reverse bias voltage to the luminescent element. By doing so, it becomes possible to effectively apply a reverse bias voltage to the luminescent element.