LCD显示器传输系统的抗噪声技术研究

摘要

The resolution of LCD and the frequency of camera video signal are getting higher and higher while LCD is applied to multimedia display.When the system frequency exceeds 40 MHz,the traditional methods restraining EMI and ESD with filters will reach their technical limit.The technique presented in this paper can be used to control the EMI in LCD by compressing the displayed data and transferring the compressed data with differential transmission based on DC balance mode,which has been used to improve the performance of the transfer system of LCD.%随着LCD模块在多媒体显示系统中的广泛应用,由于系统对LCD的分辨率要求不断提高及显示丰富多彩的视频信息,使系统频率也变得越来越高.当系统的频率超过40 MHz时,用传统的采用滤波器的方法来抑制EMI和ESD的技术也达到其应用极限.文章根据系统的特点提出采用DC均衡的差分传输技术和数据处理技术的结合方法来抑制系统的EMI.文章提出的控制EMI的技术是首先对传输数据进行处理,使处理后的数据基本趋近于0,并将已处理的数据以DC平衡的差分方式进行传输.文章提出的技术提高了LCD模块的传输的抗干扰能力,适合于折叠式手机主板与LCD模块之间的数据传输.