AM-MicroLED显示驱动技术  

AM⁃MicroLED Display Driving Technologies

作　　者：朱宇轩 廖聪维[1] 张盛东[1] ZHU Yuxuan;LIAO Congwei;ZHANG Shengdong(School of Electronic and Computer Engineering,Peking University,Shenzhen Guangdong 518071,CHN)

机构地区：[1]北京大学深圳研究生院信息工程学院,广东深圳518055

出　　处：《光电子技术》2024年第4期265-272,共8页Optoelectronic Technology

基　　金：国家重点研发计划(2022YFB3607200)。

摘　　要：介绍AM-MicroLED显示驱动技术,并在此基础上分析和讨论若干代表性的AM-MicroLED显示像素电路和行扫描(栅)电路的工作原理和设计。微型发光二极管(Micro-LED)显示具有高亮度、长寿命、高能效、宽色域和快响应等优势,有源矩阵(AM)显示有望成为下一代主流显示。Micro-LED的陡峭电流-电压特性,发光效率和波长随发光电流变化改变,使得常用脉冲幅度调制(Pulse Amplitude Modulation,简称PAM)驱动技术不适用于AM-MicroLED显示。脉冲宽度调制(Pulse Width Modulation,简称PWM)技术可用于AM-MicroLED显示的驱动。PWM驱动不论是数字还是模拟方式,均能支持AM-MicroLED显示,但仍存在一些技术难题。PAM和PWM的混合驱动(Pulse Hybrid Modulation,简称PHM)被认为是一种更为有效的驱动技术。The driving principles of AM-MicroLED displays are explained and designs are provided for pixel circuits and row-scanning(gate)driver circuits based on these principles.Micro-LED displays,offering advantages such as high brightness,wide color gamut,and fast response,are considered to surpass LCD and OLED displays and will become the next-generation mainstream display technology.However,due to the steep current-voltage characteristics of Micro-LEDs and the variations in emission efficiency and wavelength with varied current,the conventional pulse amplitude modulation(PAM)method is unsuitable for Micro-LED displays.To maintain high brightness and high EQE of Micro-LED,the pulse width modulation(PWM)method is required.PWM driving method includes both digital and analog implementations.However,PWM still faces some technical challenges.A hybrid driving method combining PAM and PWM(PHM)has proven to be a more effective solution.

关 键 词：微型发光二极管显示 驱动方法 脉冲宽度调制 混合脉冲调制 薄膜晶体管 

分 类 号：TN27[电子电信—物理电子学]