PIXEL DRIVING CIRCUIT AND DISPLAY APPARATUS therewith

Abstract

A pixel driving circuit for driving a pixel unit comprises a light emitting element, a first initiating transistor, a drive transistor with a first gate electrode and a second gate electrode, a controlling transistor, a resetting transistor, a second initiating transistor, a first storage capacitor, and a second storage capacitor. A gate electrode of the second initiating transistor receives the second control signal, a source electrode of the second initiating transistor is electrically connected to an anode of the light emitting element, and a drain electrode of the second initiating transistor is electrically connected to a source electrode of the second initiating transistor. The second initiating transistor controls the second storage capacitor to discharge through the light emittingelement and resets the anode of the light emitting element. The invention also provides a display apparatus with the pixel drive circuit.

Description

technical field [0001] The invention relates to a pixel driving circuit and a display device with the pixel driving circuit. Background technique [0002] Organic light emitting diode (OLED), as a light-emitting device, has been increasingly used in high performance display field. Display devices using OLEDs generally include pixel units arranged in a matrix. Each pixel unit corresponds to a pixel driving circuit. The pixel driving circuit includes a switching transistor, a driving transistor, a reset transistor, a storage capacitor and an OLED. The pixel driving circuit works sequentially at least in the reset phase, the compensation writing phase and the light emitting phase. In the reset phase, the reset transistor is turned on to reset the driving transistor and / or the OLED, so that the display data signal on the data line can be normally written into the driving transistor. In the writing compensation stage, the switching transistor reads the scanning signal from t...

AI Technical Summary

Problems solved by technology

However, when the size and resolution of the display become larger, as the number of pixel units increases, the time for each pixel driving circuit to work in the compensation writing phase becomes shorter, resulting in insufficient compensation of the threshold voltage of the driving transistor, and further As a result, the brightness of the OLED is reduced, and the display effect of the organic light-emitting display cannot be guaranteed.

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