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    • 5. 发明授权
    • Thin film transistor circuit, light emitting display apparatus, and driving method thereof
    • 薄膜晶体管电路,发光显示装置及其驱动方法
    • US08654114B2
    • 2014-02-18
    • US12667827
    • 2008-07-29
    • Hisae ShimizuKatsumi AbeRyo Hayashi
    • Hisae ShimizuKatsumi AbeRyo Hayashi
    • G09G5/00
    • G09G3/3258G09G3/3233G09G2300/0417G09G2300/0842G09G2320/0233G09G2320/043
    • In order to suppress an influence of an electrical stress on a TFT characteristic in use of a TFT, a light emitting display apparatus according to the present invention comprises organic EL devices and driving circuits for driving the organic EL devices. The driving circuit includes plural pixels each having a thin film transistor of which a threshold voltage reversibly changes due to the electrical stress applied between a gate terminal and a source terminal, and a voltage applying unit which sets gate potential of the thin film transistor higher than source potential. The voltage applying unit applies the electrical stress between the gate terminal and the source terminal at a time when the thin film transistor is not driven, so as to drive the thin film transistor in a region that the threshold voltage is saturated to the electrical stress.
    • 为了抑制电应力对使用TFT的TFT特性的影响,根据本发明的发光显示装置包括有机EL器件和用于驱动有机EL器件的驱动电路。 驱动电路包括多个像素,每个像素具有薄膜晶体管,其阈值电压由于在栅极端子和源极端子之间施加的电应力而可逆地改变;以及电压施加单元,其将薄膜晶体管的栅极电位设置为高于 源潜力。 电压施加单元在薄膜晶体管未被驱动时在栅极端子和源极端子之间施加电应力,以便在阈值电压饱和到电应力的区域中驱动薄膜晶体管。