Pixel unit driving circuit, driving method and pixel unit

Abstract

The invention provides a pixel unit driving circuit which is used for driving an organic light-emitting device and comprises a first thin film transistor, a second thin film transistor, a third thin film transistor and a storage capacitor. The first thin film transistor is used for being turned on or off under the control of a first scanning signal and charging the storage capacitor via a data signal when turned on, the second thin film transistor is used for being turned on under the effect of the storage capacitor and driving an organic light-emitting diode to emit light, and the third thin film transistor is used for being turned on under the control of a second scanning signal when the first thin film transistor is turned off and charging the storage capacitor via a charge signal. The pixel unit driving circuit has the advantage that splash screens due to charge leakage of the storage capacitor can be effectively prevented. The invention further provides a pixel unit and a pixel unit driving method.

Description

Technical field [0001] The present invention relates to the technical field of liquid crystal display, and in particular to a pixel unit driving circuit, a driving method and a pixel unit. Background technique [0002] Organic light-emitting diode (Organic Light-Emitting Diode, OLED) display, also known as organic electroluminescence display, is an emerging flat panel display device. The OLED display has the characteristics of simple preparation process, low cost, low power consumption, high luminous brightness, wide operating temperature range, light and thin size, fast response speed, etc., and it is easy to realize color display, large-screen display, flexible display and integrated circuit driver Therefore, it has been widely used in the flat panel display field. [0003] Pixel units in OLED displays are generally arranged in a matrix, and OLEDs can be divided into passive-matrix OLED (Passive-Matrix OLED, PM-OLED) drive displays and active-matrix OLED (Active-Matrix OLED) acc...

AI Technical Summary

Problems solved by technology

When the scan signal provided by the scan line is at a low level, the switching thin film transistor T1 is in an off state, however, due to the leakage current of the switching thin film transistor T1, the storage capacitor C s The charge on the TFT will leak to the data line along the TFT T1 when the TFT T1 is in the cut-off state, resulting in the storage capacitor C s The voltage drops gradually, that is, there is a jump voltage (such as figure 2 ), so that the voltage of the gate g2 of the driving thin film transistor T2 drops significantly when the switching thin film transistor T1 is in the cut-off state, thereby causing the OLED display screen to flicker

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