Active matrix/organic light emitting diode and driving circuit and method thereof

Abstract

The invention disclose an active matrix / organic light emitting diode and a driving circuit and method thereof, which relate to the technical field of organic light emitting display, and aim to increase the brightness uniformity of the active matrix / organic light emitting diode. The driving circuit of the active matrix / organic light emitting diode comprises a driving transistor, a first transistor, a second capacitor, an organic light emitting diode and a voltage regulating module, wherein the voltage regulating module connected among a first control signal end, a second control signal end and a high level signal end is connected with the second capacitor, the driving transistor and the first transistor and used for regulating the grid source voltage of the driving transistor connected with the second capacitor so that the driving current of the driving transistor in a saturated state is unrelated to the threshold voltage of the driving transistor. The active matrix / organic light emitting diode can be used for organic light emitting display.

Description

technical field [0001] The invention relates to the field of organic light-emitting display technology, in particular to an active matrix organic light-emitting diode panel, a driving circuit and a method thereof. Background technique [0002] AMOLED (Active Matrix Organic Light Emitting Diode) is an active matrix organic light emitting diode panel. Compared with the traditional transistor liquid crystal display panel (TFT LCD, Thin Film Transistor Liquid Crystal Display), AMOLED has the advantages of faster response speed, higher contrast ratio, and wider viewing angle, so it is called the next generation display technology. It is favored by most display technology developers. [0003] The active matrix organic light emitting diode panel is driven by a driving circuit to emit light. The traditional 2T1C drive circuit consists of two transistors (TFT) and a capacitor (C), the traditional 2T1C drive circuit such as figure 1 shown. figure 1 Among them, transistor M1 is a s...

AI Technical Summary

Problems solved by technology

Because in the existing low-temperature polysilicon process, the threshold voltage V of the transistor th The uniformity is poor, and drift will occur during use, so when the same data voltage Vdata is input to the drive tube M2, the threshold voltage of the drive tube M2 is different to generate different drive currents, resulting in poor uniformity of AMOLED brightness

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