Pixel driving circuit, display panel and electronic equipment

Abstract

The embodiment of the invention discloses a pixel driving circuit, a display panel and electronic equipment. The pixel driving circuit comprises an initialization module, a write-in module, a drivingtransistor and a light emitting module; the initialization module comprises a first transistor; the write-in module comprises a second transistor and a third transistor; the second electrode of the driving transistor is connected with the positive electrode of the light-emitting module and used for providing driving current for the light-emitting module in the light-emitting stage so as to drive the light-emitting module to emit light. Thus, under the condition that the voltage of the control electrode of the driving transistor is influenced by the leakage current of the first transistor and the second transistor which are connected with the driving transistor, the first transistor uses the N-type thin film crystal, and / or the second transistor uses the N-type thin film transistor, and dueto the fact that the leakage current of the N-type thin film transistor is small, the N-type thin film crystal is adopted, so the leakage current can be reduced to a greater extent, thereby reducingthe voltage change of the control electrode and solving the problem of abnormal display.

Description

technical field [0001] The present application relates to display technology, in particular to a pixel driving circuit, a display panel and electronic equipment. Background technique [0002] Active-matrix organic light-emitting diode (AMOLED) is favored by the market due to its low power consumption, high color gamut, high brightness, high resolution, wide viewing angle, and high response speed. favor. The AMOLED display is a self-illuminating display, which is driven by current to emit light. The pixel driving circuit used to provide a stable current in the AMOLED display is composed of thin film transistors (Thin film transistor, TFT). [0003] In the pixel drive circuit, the current of the drive transistor is determined by the gate and source voltages, the source voltage is provided stably by the voltage source, and the gate voltage is maintained by the storage capacitor, but affected by the leakage of other transistors, it will make The gate voltage of the drive trans...

AI Technical Summary

Problems solved by technology

[0003] In the pixel drive circuit, the current of the drive transistor is determined by the gate and source voltages, the source voltage is provided stably by the voltage source, and the gate voltage is maintained by the storage capacitor, but affected by the leakage of other transistors, it will make The gate voltage of the drive transistor changes, and the longer the hold time of one frame, the greater the voltage change

[0004] At present, AMOLED display screens mostly use the method of reducing the refresh rate to work in a low power consumption state, but after the refresh rate is reduced, the holding time of one frame is also increased accordingly. According to the formula It=cu, I is the leakage current, and t is the holding time. Time, c is the storage capacitor, and u is the changing voltage. When the refresh frequency is changed from 60HZ to 1HZ, the holding time is increased by 60 times, and the changing voltage will be increased by 60 times, resulting in a large change in the current of the driving transistor. There is an abnormal display problem on the screen

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