Organic light-emitting pixel driving circuit, driving method and organic light-emitting display panel

Abstract

The invention discloses an organic light-emitting pixel driving circuit, a driving method thereof and an organic light-emitting display panel. The organic light-emitting pixel driving circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a capacitor and a light-emitting element, wherein the first transistor transmits an initialization voltage to the light-emitting element; the second transistor transmits an initialization voltage to a driving transistor and compensates for a threshold voltage of the driving transistor; the third transistor transmits a data signal voltage to the driving transistor; the fourth transistor transmits a first power voltage signal to the driving transistor; the fifth transistor is coupled between the driving transistor and an anode of the light-emitting element in series, and controls the electrical connection between the driving transistor and the anode of the light-emitting element; the capacitor is used for storing the data signal voltage transmitted to the driving transistor; and the light-emitting element is used for emitting light in response to a driving current generated by means of the driving transistor. The organic light-emitting pixel driving circuit, the driving method thereof and the organic light-emitting display panel can avoid the influence of the threshold voltage on the light-emitting element, so that the operating current driving the light-emitting element to emit light remains stable and the uniformity of the brightness of the display panel is improved.

Description

technical field [0001] The present disclosure generally relates to the field of display technology, and in particular, relates to an organic light emitting pixel driving circuit, a driving method, and an organic light emitting display panel. Background technique [0002] The organic light-emitting display panel displays images by using organic light-emitting elements. The organic light-emitting display panel has the advantages of fast response and low power consumption, and is more and more widely used in various electronic devices. [0003] In general, a display panel of an organic light emitting display device includes a plurality of pixels arranged in a matrix shape, and each of the pixels includes an organic light emitting element. Therefore, the quality of the working state of the organic light-emitting element directly affects its uniformity and brightness. The organic light-emitting element is a current control component, which is usually driven by the current genera...

AI Technical Summary

Problems solved by technology

Due to the limitations of the manufacturing process, especially the threshold voltage |Vth| of the drive tube made of low-temperature polysilicon technology is very poor and has drift, resulting in different drive currents when the same gray-scale voltage is input

The inconsistency of the driving current makes the working state of the organic light-emitting element unstable, resulting in poor uniformity of display brightness of the organic light-emitting panel

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