A Single Sweep Signal Enabled Analog PWM Pixel Circuit for Progressive-Emission Mode Active-Matrix Micro-LED Displays

IF 4.1 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Electron Device Letters Pub Date : 2025-01-14 DOI:10.1109/LED.2025.3529745

Yuxuan Zhu;Congwei Liao;Lingxiao Qian;Shengdong Zhang

引用次数: 0

Abstract

This letter introduces an analog pulse width modulation (A-PWM) pixel circuit for progressive-emission (PE) active-matrix micro light-emitting diode (AM

$\mu $

LED) displays, which is enabled by a single sweep signal instead of the conventional multiple sweep signals. The PE mode is implemented by double resetting the in-pixel comparator, thereby dividing one frame into two sub-frames, where each sub-frame contains one segment of the sweep signal, together forming a complete ramp waveform. The proposed pixel circuits were fabricated using amorphous indium gallium zinc oxide thin-film transistors (a-IGZO TFTs). Measurement results showed that the A-PWM pixel circuit can express gray levels in the PE mode, and the error rate is lower than 3.62% at 64 gray level even for a

${V} _{\text {T}}$

shift of 2 V.

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来源期刊

IEEE Electron Device Letters 工程技术-工程：电子与电气

CiteScore

8.20

自引率

10.20%

发文量

551

审稿时长

1.4 months

期刊介绍： IEEE Electron Device Letters publishes original and significant contributions relating to the theory, modeling, design, performance and reliability of electron and ion integrated circuit devices and interconnects, involving insulators, metals, organic materials, micro-plasmas, semiconductors, quantum-effect structures, vacuum devices, and emerging materials with applications in bioelectronics, biomedical electronics, computation, communications, displays, microelectromechanics, imaging, micro-actuators, nanoelectronics, optoelectronics, photovoltaics, power ICs and micro-sensors.