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1. (WO2018196096) PIXEL DRIVING CIRCUIT, DISPLAY PANEL AND PIXEL DRIVING METHOD

Pub. No.:    WO/2018/196096    International Application No.:    PCT/CN2017/086738
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Thu Jun 01 01:59:59 CEST 2017
IPC: G09G 3/32
Applicants: SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
深圳市华星光电技术有限公司
Inventors: CAI, Yuying
蔡玉莹
Title: PIXEL DRIVING CIRCUIT, DISPLAY PANEL AND PIXEL DRIVING METHOD
Abstract:
A pixel driving circuit, a display panel and a pixel driving method, the pixel driving circuit comprising: a drive switch (40) connected between a drive power supply and an organic light emitting diode (10); a first switch (502) connected between the source and gate of the drive switch (40), the first switch (502) and the drive switch (40) being transistors of the same model; a control circuit (30) connected between the drain and gate of the first switch (502), the control circuit (30) being used for inputting a first control signal (V S1) and outputting a compensation current (I ref to compensate for the threshold voltage drift of the first switch (502); and a storage unit (20) connected between the source of a second switch (504) and the gate of the first switch (502), the storage unit (20) being used for storing the compensation voltage supplied to the first switch (502) by the compensation current (I ref). The gate of the second switch (504) is used to input a second control signal (V S2), and the drain of the second switch (504) is used to input a data signal (V d). The current of the organic light emitting diode (10) of the pixel driving circuit is stable, and the brightness of the display panel is displayed uniformly.