运用乒乓操作的SRAM缓存结构，给出了一个基于FPGA的显示驱动方案，并结合数字时间比率灰度技术，采用分子场方式成功设计了时分256级灰度的接口系统。仿真及测试结果表明，该系统各项输出符合要求，能够驱动所需的显示屏。通过乒乓操作，有效地提高了显示屏的响应效率，并扩大了其应用范围。

A digital scheme of display based on FPGA was designed, with SRAM cache architecture of Ping-pong operation. And a design of interface system for 256 level gray scale display has been realized by the method of sub-frame, with digital time gray technology. Simulation and test results indicate that the system can give off suitable control signals and drive the screen. Besides, by means of Ping-pong operation, the responsive efficiency of display screen is improved efficaciously, and the application area is widened.