Pixel structure and driving method thereof

Abstract

The invention discloses a pixel structure, which comprises a first capacitor, an input unit, a pixel driving unit, a compensating unit, a first reset unit, a light emitting diode and a luminous actuating unit. The first capacitor has a first end and a second end; the first end is coupled to a first reference voltage; the pixel driving unit is used for providing driving current in accordance with a voltage at the second end of the first capacitor and a first voltage; the compensating unit is used for controlling the voltage at the second end of the first capacitor in accordance with a first scanning signal; the first reset unit is used for resetting the voltage at the second end of the first capacitor in accordance with a light emitting signal at the (N+1)th level; the light emitting diode is used for receiving a second reference voltage and the driving current; the luminous actuating unit is coupled between the light emitting diode and the pixel driving unit; and the luminous actuating unit is used for offering the driving current to the light emitting diode in accordance with a light emitting signal at the Nth level. The pixel structure provided by the invention can provide the relatively stable driving current.

Description

technical field [0001] The present invention relates to a pixel structure and a driving method thereof, in particular to a pixel structure capable of providing a stable driving current and a driving method thereof. Background technique [0002] Among the current various digital display devices, Active Matrix Organic Light Emitting Display (AMOLED) has self-illumination, high brightness, high luminous efficiency, high contrast, fast response, wide viewing angle and usable It has advantages such as large temperature range, so it is very competitive in the market of digital display devices. [0003] A conventional AMOLED device includes a scan driving circuit, a data driving circuit and a plurality of pixel units. Each pixel unit in an existing AMOLED device includes an input transistor, a driving transistor, a storage capacitor and a light emitting diode. [0004] The scan driving circuit and the data driving circuit are respectively used to provide a scan signal and a data ...

AI Technical Summary

Problems solved by technology

[0005] However, in the operation of the active matrix organic light-emitting display device, the driving current is affected by the threshold voltage of the driving transistor. Because there is a certain error in the threshold voltage of the driving transistor of each pixel unit in the AMOLED device, the threshold voltage The error will cause the brightness of the pixel to be distorted and reduce the display quality

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