发明授权
US08212749B2 AMOLED drive circuit using transient current feedback and active matrix driving method using the same
有权
AMOLED驱动电路采用瞬态电流反馈和有源矩阵驱动方式使用
- 专利标题: AMOLED drive circuit using transient current feedback and active matrix driving method using the same
- 专利标题(中): AMOLED驱动电路采用瞬态电流反馈和有源矩阵驱动方式使用
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申请号: US11693819申请日: 2007-03-30
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公开(公告)号: US08212749B2公开(公告)日: 2012-07-03
- 发明人: Gyu-Hyeong Cho , Young-Suk Son , Sang-Kyung Kim , Jin-Yong Jeon , Gun-Ho Lee
- 申请人: Gyu-Hyeong Cho , Young-Suk Son , Sang-Kyung Kim , Jin-Yong Jeon , Gun-Ho Lee
- 申请人地址: KR Daejeon-si
- 专利权人: Korea Advanced Institute of Science and Technology
- 当前专利权人: Korea Advanced Institute of Science and Technology
- 当前专利权人地址: KR Daejeon-si
- 代理机构: Bachman & LaPointe, P.C.
- 主分类号: G09G3/32
- IPC分类号: G09G3/32
摘要:
Disclosed herein is an Active Matrix Organic Light-Emitting-Diode (AMOLED) drive circuit using transient current feedback. The AMOLED drive circuit includes a current Digital-to-Analog Converter (DAC), a data line drive transistor, a constant current source, a variable current source, a differential amplifier, and a transient charging current control unit. The DAC generates current corresponding to input digital data. The data line drive transistor is configured such that the drain terminal thereof is connected to the output node of the current DAC. The constant current source is connected between the source terminal of the data line drive transistor and a ground. The variable current source is connected between both the output node of the current DAC and the drain terminal of the drive transistor, and a voltage source. The differential amplifier is configured to input the output voltage thereof to the gate terminal of the drive transistor. The transient charging current control unit is configured to increase or decrease the bias current of the variable current source depending on variation in the voltage of the output node of the current DAC.
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