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    • 4. 发明授权
    • Pixel driving circuit, array substrate, display panel and display apparatus having the same, and driving method thereof
    • US10249238B2
    • 2019-04-02
    • US15513279
    • 2016-08-23
    • BOE TECHNOLOGY GROUP CO., LTD.CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    • Youngyik KoBo WangYipeng ChenYi Zhang
    • G09G3/325G09G3/3233
    • The present application discloses a pixel driving circuit configured to operate in a display cycle including sequentially an initialization period, a compensation period, and a light-emitting period, the pixel driving circuit including a driving transistor having a gate, a source, and a drain; a first storage capacitor having a first terminal connected to the gate of the driving transistor and a second terminal connected to a first power signal input port; an emission control sub-circuit disposed between the source of the driving transistor and the first power signal input port; a data write-in sub-circuit disposed between a data input port and the drain of the driving transistor which is also connected to the emission control sub-circuit; a compensation sub-circuit disposed between the source of the driving transistor and the first terminal of the first storage capacitor; and a light emitting device having a first terminal connected to the emission control sub-circuit and a second terminal connected to a second power signal input port; the data write-in sub-circuit is configured to control a data voltage signal to be passed into the drain of the driving transistor during the compensation period; the compensation sub-circuit is configured to control a connection between the source and the gate of the driving transistor during the compensation period to set the driving transistor to a conduction state for inducing a source-to-drain current until a gate voltage of the driving transistor reaches a value substantially equal to the data voltage signal plus a threshold voltage of the driving transistor.