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:
May. 10, 2005
Filed:
Sep. 03, 2002
Shang-li Chen, Hsinchu, TW;
Chien-ru Chen, Pingtung, TW;
Jun-ren Shih, Changhua, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A circuit for driving active matrix LED pixels, having a capacitor, a light emitting diode, and a first and second transistor. The capacitor is connected between a gate and source of the first transistor, and the second transistor has a source connected to a drain of the first transistor and a gate connected to receive a first voltage by which the first and second transistor operates in a saturation region, and a current switch controlled by a scan signal, wherein a first current corresponding to a data signal flows through the first and second transistor to generate a second voltage stored on the capacitor when the current switch is closed, and a second current through the first and second transistor is generated by the second voltage stored on the capacitor to turn on the light emitting diode when the current switch is opened.