LED display screen is a popular display terminal in recent decades.As a display terminal of media,high-quality image display is an important factor in the evaluation of an LED display screen.This paper presents a gray-scale modulation algorithm which provides the optimal control parameter selection method in actual engineering design.It can makes the best use of the resources and reduces engineering design costs furthest.In this paper,first,we construct a reasonable structure of the screen body and discuss the relationship between the various design parameters.The paper gives the formula of the time series of signal,the holdup time of each frame of the image,the constrained relationship between lighting efficiency and the design parameters and the constrained relationship between scan clock and design parameters etc.That provides a strong theoretical basis for the designers.We can choose a reasonable parameter to meet the various of requirements of design.It can make the design more reasonable and more perfect.Finally,the article gives the method and steps of control system design of LED display with the core of ARM.%LED显示屏是近几十年来兴起的显示终端,作为媒体显示终端,高质量的图像显示是评价一个LED显示屏的重要因素.提出的一种灰度调制算法,为实际工程设计提供了最优控制参数选取方法,最大程度地利用资源和降低工程设计成本.文章首先构建了合理的屏体结构,讨论了各种设计参数之间的关系.文章中给出了信号时序的计算公式、每帧数据图像占用的时间、点亮效率和设计参数的约束关系、扫描时钟和设计参数的约束关系等,为设计者提供了有力的理论基础,对于不同要求的设计选择合理的参数,使得设计更加有理有据,更加完美,最后给出了以ARM单片机为核心控制系统设计的LED显示屏的方法步骤.
展开▼
