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. 25, 2011
Filed:
Oct. 04, 2006
Gyu-hyeong Cho, Gongju-si, KR;
Jin-yong Jeon, Daegu-si, KR;
Gun-ho Lee, Bucheon-si, KR;
Young-suk Son, Hwaseong-si, KR;
Sang Kyung Kim, Daejeon-si, KR;
Gyu-hyeong Cho, Gongju-si, KR;
Jin-yong Jeon, Daegu-si, KR;
Gun-ho Lee, Bucheon-si, KR;
Young-suk Son, Hwaseong-si, KR;
Sang Kyung Kim, Daejeon-si, KR;
Korea Advanced Institute of Science and Technology, Daejeon-si, KR;
Abstract
An active matrix organic light emitting diode AMOLED driving circuit using current feedback that ensures the uniformity of brightness in pixels of a flat panel display and shortens the time required to input accurate current to respective pixels in the driving circuit. The prevent invention provides an AMOLED driving circuit using current feedback, comprising: a current digital-to-analog converter outputting a current corresponding to input digital data; a first differential amplifier connected to the current digital-to-analog converter and controlling the input data current and a driving current of a driving transistor of a pixel circuit to be identical to each other; a current mirror mirroring driving current of an organic light emitting diode of the pixel circuit to an input side of the first differential amplifier; and a second differential amplifier coupled to the current mirror and controlling charge and discharge speeds of parasitic capacitance of the pixel circuit.