摘要
针对传统LED显示屏刷新率的不足,设计了一种提高LED驱动芯片刷新率的PWM控制电路。将一个刷新周期平均打散分为128段,每段含有256个灰度时钟,占空比由16位灰度数据决定。同时采用基于双边沿触发的灰度计数器,提高了LED显示屏的刷新率,避免画面闪烁。
For the shortcomings in refresh rate of the traditional LED display,a PWM control circuit to improve the refresh rate of the LED driver is designed. A refresh cycle average scattering is divided into 128 sections,each con-taining 256 gray clocks,and the duty ratio of PWM is determined by the 16 gray scale data. At the same time,by us-ing gray counters with double edge triggered,refresh rate of LED display is increased and avoids flicker.
出处
《电子器件》
CAS
北大核心
2016年第1期16-20,共5页
Chinese Journal of Electron Devices
