AMOLED direct electric signal mixing feedback circuit and driving method thereof

Abstract

The invention discloses an AMOLED direct electric signal mixing feedback circuit. The AMOLED direct electric signal mixing feedback circuit comprises pixel circuits contained in all pixels of an AMOLED, a peripheral driving circuit for providing electric signals for driving the pixel circuits, and data lines connected with the peripheral driving circuit and the pixel circuits, wherein the peripheral driving circuit comprises a current control voltage source and a function module; the data lines comprise a first data line and a second data line; and each pixel circuit comprises an organic light-emitting diode, a voltage control current source, a storage capacitor, a first switch and a second switch. The AMOLED direct electric signal mixing feedback circuit directly and accurately corrects the voltage of the organic light-emitting diode through feedback and the peripheral driving circuit, effectively compensates inhomogenous electrical properties of the voltage control current source in the pixel circuit caused by deficiencies of transistor manufacturing processes and the influence on the current accuracy of the organic light-emitting diode by IRDrop in connecting lines, simplifies the circuit structure, improves the system accuracy, and can be used for driving the organic light-emitting diode.

Description

technical field [0001] The invention relates to a driving device and method for AMOLED, in particular to an AMOLED direct electric signal mixing feedback circuit and a driving method thereof, belonging to the technical field of electronic display. Background technique [0002] Organic light-emitting diode displays have the characteristics of small size, self-illumination, large viewing angle, short response time and low production cost, and have been increasingly used in various display circuits. But for the driving of OLEDs, there has been a lack of a high-speed and precise method common to different processes. [0003] Currently, OLED driving methods are mainly divided into two types: passive driving and active driving. Passive driving cannot be used for high-resolution large screens, so active driving methods are mainly used in high-resolution large screens at present. [0004] OLED active driving methods can be roughly divided into three methods: voltage driving, curre...

AI Technical Summary

Problems solved by technology

Among them, the voltage driving speed is fast, but due to problems such as thin-film transistor threshold voltage drift and IR drop in the circuit, the OLED current will eventually be inaccurate. In order to solve this problem, the pixel circuit has to become more complicated, which brings many production problems. question on

In contrast, current driving is more accurate, but at low gray levels, the parasitic capacitance resistance in the data line makes it too slow

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