Organic light emitting display panel and fabrication method therefor

Abstract

The invention discloses an organic light emitting display panel. The organic light emitting display panel comprises a substrate and a driving thin film transistor, a switching thin film transistor, a storage capacitor and an organic light emitting device which are formed on the substrate; an external voltage signal passes through the switching thin film transistor to be stored in the storage capacitor; the external voltage signal controls the size of the conduction current of the driving thin film transistor so as to control the gray scale of the organic light emitting device; the driving thin film transistor is a low-temperature polysilicon thin film transistor; and the switching thin film transistor is a metal oxide semiconductor thin film transistor. The invention also discloses a fabrication method for the organic light emitting display panel. According to the organic light emitting display panel and the fabrication method therefor, the drain of the low-temperature polysilicon thin film transistor is in contact with the bottom electrode of the organic light emitting device, so that the current supplied for the organic light emitting device is stable, and the organic light emitting device can realize stable light emitting; and meanwhile, the electrical leakage of the metal oxide semiconductor thin film transistor is relatively low, so that a better circuit closing effect can be realized.

Description

technical field [0001] The invention belongs to the technical field of organic light-emitting display, and in particular relates to an organic light-emitting display panel and a manufacturing method thereof. Background technique [0002] In recent years, organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel has become a very popular emerging flat display panel product at home and abroad. Time (1μs), high luminous efficiency, wide color gamut, low operating voltage (3 ~ 10V), thin thickness (less than 1mm), can make large-sized and flexible panels and simple manufacturing process, and it also has Low cost potential. [0003] Existing OLED display panels can be classified into passive OLED display panels (PM-OLED) and active OLED display panels (AM-OLED) according to their driving methods. In an active OLED display panel, a thin film transistor (TFT) is usually used together with a capacitor to store signals to control the brightness grayscale perfo...

AI Technical Summary

Problems solved by technology

However, when the metal oxide semiconductor thin film transistor is used as the driving thin film transistor, the current provided by the metal oxide semiconductor thin film transistor to the OLED will be unstable, resulting in unstable light emission of the OLED; and when the low temperature polysilicon thin film transistor is used as the introduction When switching the thin film transistor with the voltage signal sent from the outside, the leakage current of the low temperature polysilicon thin film transistor is high, so that a better circuit closing effect cannot be achieved

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