基于FPGA的LCD外接功能接口连通性快速测量系统

摘要

On the LCD product factory, beside the need for optical characteristics and PCB inspection, the functions of its various external interface connectivity testing is also an important part. Most LCD manufacturers testing external function interface is still in the manual inspection stage. The use of FPGA chip can output high - impedance state and read features, so the LCD external functional interface speed measurement system is designed The practical application prove that it can quickly determine the existence of an external function interface open, short, connections and other defects, and it also has characteristics of on - line measurement accurate and rapid detection, and thus save costs for LCD manufacturers and has important using value.%在LCD液晶成品出厂前,需要进行光电特性及PCB检测外,其各种外接功能接口的连通性检测也是重要的环节,目前多数LCD厂家对外接功能接口检测尚处于人工检测阶段.利用FPGA芯片可以输出和读取高阻态的特点,设计并制作了LCD外接功能接口快速测量系统,实际应用证明其可以快速判断外接功能接口存在的开路、短路、连线等缺陷,具有在线测量准确、快速检测的特点,为LCD厂家节省了成本,具有重要的使用价值.