Special Display Technology Research Based On FPGA

Display technology utility currently ranges from the common areas to the special field. During special display field, the liquid crystal display has many advantages, such as small space, high quality, no radiation and so on, it has become the mainstream. In the future, it will have huge development. In order to ensure the security of information, making display technology self-control is putting on agenda. Therefore, taking independent special display technology research has great significance.Special display is different from common display. It is more strictly on data-processing and volume. During special display, the display often designed as a complex data processing system. There are high-speed CPU、large-capacity solid-state memory and high-speed graphics accelerator module embedded in it. The subject designs on Lonngson series CPU platform. The work and the main achieved are as follows:1. Using Chinese Academy of Science independent processor constitutes the embedded system, thus the development of special technology is controllable.2. Based on FPGA technology, FPGA as core part of the video processing module, self-developed IP core, completed data receiving, scaling, and integration in frame buffer.3. For the special display environment, making redundant design of FPGA to ensure the normal operation of the display. FPGA achieves the following six functions:(1) serial-to-parallel converted video signal recognition and display;(2) A/D conversion and decoding SOG and the identification of a PAL video signal and display;(3) different types of video signal fusion;(4) reads the data from frame buffer and sent to display in a fixed format;(5)1UART, switch the channel command by receiving instrument controllers, as well as the key code sent;(6) identification keys, display brightness adjustment control and key indicator control.The result achieved has great application prospect in special display field.