Invention Grant
- Patent Title: Active matrix OLED driving circuit using current feedback
- Patent Title (中): 有源矩阵OLED驱动电路采用电流反馈
-
Application No.: US11543588Application Date: 2006-10-04
-
Publication No.: US07876292B2Publication Date: 2011-01-25
- Inventor: Gyu-hyeong Cho , Jin-yong Jeon , Gun-ho Lee , Young-suk Son , Sang Kyung Kim
- Applicant: Gyu-hyeong Cho , Jin-yong Jeon , Gun-ho Lee , Young-suk Son , Sang Kyung Kim
- Applicant Address: KR Daejeon-si
- Assignee: Korea Advanced Institute of Science and Technology
- Current Assignee: Korea Advanced Institute of Science and Technology
- Current Assignee Address: KR Daejeon-si
- Agency: Bachman & LaPointe, P.C.
- Priority: KR10-2005-0093561 20051005
- Main IPC: G09G3/36
- IPC: G09G3/36

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.
Public/Granted literature
- US20070075939A1 Active matrix OLED driving circuit using current feedback Public/Granted day:2007-04-05
Information query
IPC分类: