Pixel driving circuit of organic light-emitting diode

Abstract

The invention discloses a pixel driving circuit of an organic light-emitting diode, which comprises a first switch, a first capacitor, a first transistor, a second switch, a second capacitor and an organic light-emitting diode. The operation of the pixel driving circuit is implemented by steps of reconfiguration, clinic voltage compensation, data writing and light emission driving. The pixel driving circuit can compensate the transistors for clinic voltages, so the driving current of the organic light-emitting diode is only associated with a data voltage and a reference voltage.

Description

【Technical field】 [0001] The invention relates to a pixel driving circuit of an organic light emitting diode, in particular to a pixel driving circuit of an organic light emitting diode capable of compensating the critical voltage of a transistor. 【Background technique】 [0002] Please refer to figure 1 , figure 1 It is a schematic diagram of a display panel of an organic light emitting diode (OLED) in the background technology. The display panel 10 includes a data driver 11 , a scan driver 12 and a display array 13 . Data driver 11 controls the data line DL 1 to DL n , and the scan driver 12 controls the scan line SL 1 to SL m . Display array 13 is controlled by the data line DL 1 to DL n and scan line SL 1 to SL m It is formed by interlacing, and each interlaced data line and scanning line form a display unit, for example, data line DL 1 and scanline SL 1 The display unit 14 is formed. Such as figure 1 As shown, the equivalent circuit of the display unit 14 ...

AI Technical Summary

Problems solved by technology

[0007] However, due to the manufacturing process of thin film transistors, in the display array 13, the electrical differences of the driving transistors in each region, that is, the differences in the threshold voltage values ​​of the driving transistors

Therefore, when a plurality of display units in different regions receive pixel data with the same voltage, due to differences in the threshold voltages of the driving transistors, the values ​​of the driving currents provided to the OLEDs in these display units are inconsistent, resulting in organic The brightness produced by the light emitting diodes is different, and the display panel 10 displays uneven images.

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