AMOLED (Active Matrix/Organic Light Emitting Diode) pixel drive circuit and AMOLED pixel drive method

Abstract

An AMOLED (Active Matrix / Organic Light Emitting Diode) pixel drive circuit disclosed by the invention comprises a storage capacitor for a pixel unit, a digital-to-analog conversion unit, a data line and a Vavg power supply, the digital-to-analog conversion unit is used for converting digital signals into data voltage Vdata, the data line is connected with the digital-to-analog conversion unit and the storage capacitor, and the Vavg power supply is connected between the digital-to-analog conversion unit and the data line and used for precharging. The invention has the advantage that by arranging the Vavg power supply (generator) between the digital-to-analog conversion unit (DAC) of the conventional circuit and the data line for charging the storage capacitor and utilizing the Vavg power supply to store the data signal of the next cycle in advance, the AMOLED pixel drive circuit achieves the purpose of shortening the time of writing the data signal of the next cycle and reducing power consumption.

Description

technical field [0001] The invention belongs to the field of flat panel display technology, and relates to pixel drive of an active light-emitting diode flat panel display, in particular to an AMOLED pixel drive circuit and a drive method. Background technique [0002] In flat panel display technology, Organic Light-Emitting Diode (OLED) displays are famous for their thinness, active light emission, fast response speed, wide viewing angle, rich colors and high brightness, low power consumption, and high and low temperature resistance. It is recognized by the industry as the third-generation display technology after liquid crystal display (LCD). Active OLED (Active Matrix OLED, AMOLED) is also called active matrix OLED, and AMOLED can realize large-sized OLED by integrating a thin-film transistor (TFT) and a capacitor in each pixel and maintaining the driving voltage by the capacitor. , High-resolution panels are the focus of current research and the development direction of...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the existing AMOLED pixel driving method / circuit, which is used to maintain the pixel driving voltage storage capacitor charging and discharging process switching power consumption and long charging and discharging time, and proposes a method suitable for AMOLED pixels. Driving circuit and corresponding driving method

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