Full-color LED display by simulation of PWM

LI Xiang-guo; YAO Xiao-kui; ZHAO Guang-he

doi:10.3788/YJYXS20142903.0361

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Full-color LED display by simulation of PWM

Table of contents | 更新时间：2020-08-12

- Full-color LED display by simulation of PWM
- Chinese Journal of Liquid Crystals and Displays Vol. 29, Issue 3, Pages: 361-369(2014)
- 作者机构：
  
  河南工业大学信息科学与工程学院, 河南郑州 450001
- 作者简介：
- 基金信息：
- DOI：10.3788/YJYXS20142903.0361
  CLC： TN27
- Received：16 July 2013，
  
  Revised：22 September 2013，
  
  Published Online：08 October 2013，
  
  Published：25 April 2014
- 稿件说明：
移动端阅览
李相国, 姚晓魁, 赵广河. 一种基于模拟PWM的全彩色LED显示屏[J]. 液晶与显示, 2014,29(3): 361-369

LI Xiang-guo, YAO Xiao-kui, ZHAO Guang-he. Full-color LED display by simulation of PWM[J]. , 2014,29(3): 361-369
李相国, 姚晓魁, 赵广河. 一种基于模拟PWM的全彩色LED显示屏[J]. 液晶与显示, 2014,29(3): 361-369 DOI： 10.3788/YJYXS20142903.0361.

LI Xiang-guo, YAO Xiao-kui, ZHAO Guang-he. Full-color LED display by simulation of PWM[J]. , 2014,29(3): 361-369 DOI： 10.3788/YJYXS20142903.0361.

摘要

提出一种基于扫描方式模拟实现PWM功能的全彩色显示屏方案。该方案使用D触发器进行信息存储及LED通断控制，通过向D触发器写入信息控制LED的工作状态，按照PWM序列串值对D触发器周期循环写入来模拟实现PWM控制功能。详细介绍了系统的工作原理，设计实现了扫描控制器，并分析了系统参数及可行性。该方案的功耗及成本较低，具有功能上的灵活性，消除了传统扫描方式中闪烁及亮度损失问题，并具有较好的电源完整性及信号完整性。

Abstract

This paper presents a full-color LED display scheme based on simulation of PWM function. In this scheme

each LED is equipped with one D type flip-flop which is used to store information and control the LED on/off

and the LED status can be controlled by writing information into the D type flip-flop

thus the PWM function can be simulated and realized by writing the PWM binary code into the D type flip-flop cyclically and periodically. In the paper

the working principle of the system is introduced in detail

and the scan controller is designed carefully

and the parameters and feasibility of the system are also analyzed. Compared with traditional schemes

the proposed scheme has the advantages of lower power consumption and costs

as well as better functional flexibility; moreover

it eliminates the flickering and sacrificing brightness problem in traditional scanning scheme

and also has better signal and power integrity.

关键词

Keywords

references

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