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AMOLED pixel driving circuit and pixel driving method with compensation of threshold voltage changes
AMOLED pixel driving circuit and pixel driving method with compensation of threshold voltage changes
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机译：具有阈值电压变化补偿的AMOLED像素驱动电路及像素驱动方法
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摘要
The present invention provides an AMOLED pixel driving circuit and a pixel driving method. The AMOLED pixel driving circuit utilizes a 5T2C structure, comprising a first, a second, a third, a fourth and a fifth thin film transistors (T1, T2, T3, T4, T5), a first, a second capacitors (C1, C2) and an organic light emitting diode (OLED), and the first thin film transistor (T1) is a drive thin film transistor; and a first, a second and a third global signal (G1, G2, G3) are involved, and the three and the scan signal (Scan) are combined with one another and correspond to an initialization stage (1), a data signal writing stage (2), a threshold voltage compensation stage (3) and a drive stage (4) one after another. The data writing signal stage (2) and the threshold voltage compensation stage (3) are separately implemented. The threshold voltage changes of the drive thin film transistor and the organic light emitting diode can be effectively compensated by source following of the drive thin film transistor to make the display brightness of the AMOLED more even and to raise the display quality.
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机译：本发明提供了一种AMOLED像素驱动电路和像素驱动方法。 AMOLED像素驱动电路采用5T2C结构，包括第一，第二，第三，第四和第五个薄膜晶体管（T 1， T 2， T 3， T 4， T 5 ），第一，第二电容器（C 1， C 2 ）和有机发光二极管（OLED），并且第一薄膜晶体管（T 1 ）是驱动薄膜晶体管;以及第一个，第二个和第三个全局信号（G 1， G 2， G 3 ），这三个和扫描信号（Scan）相互组合，分别对应于初始化阶段（ 1 ），数据信号写入阶段（ 2 ），阈值电压补偿阶段（< B> 3 ）和一个驱动台（ 4 ）一个接一个。数据写入信号级（ 2 ）和阈值电压补偿级（ 3 ）分别实现。通过驱动薄膜晶体管的源极跟随可以有效地补偿驱动薄膜晶体管和有机发光二极管的阈值电压变化，以使AMOLED的显示亮度更加均匀并且提高显示质量。
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