Design And Implementation Of FPGA-based Digital Micro Mirror Engine System

With the rising demand of display devices, display technology enters into the booming stage and is widely applied to many fields. Among all of these display technologies, the DLP (Digital Light Processing) projection display technology with high resolution, high luminance output and brilliant color, becomes the leading digital projection display technology. The core of DLP technology is DMD (Digital Micromirror Device). The DLP display system, as the application of DLP technology, generally consists of three parts that are digital micromirror device engine system, optical system and light source. This paper focuses on the technical innovations of the engine system and lays emphasis on the design and implementation of the engine system based on an advanced digital micromirror device, which is co-invented by author’s laboratory team. Compared with TI’s DMD, it has faster response speed and larger integration.Based on the previous studies and combined with actual project, this paper designs a hardware platform with Stratix II series of FPGA as core processor. Its highest working frequency is800MHZ. The system realizes high definition video signal receiving, storing and processing, digital micromirror device drive and management, color wheel drive and control, light source synchronous control, etc. It solves a series of engineering problems, like signal integrity, power integrity and complex PWM algorithm. In addition, combined with optical system and light source, a DLP display system is established with the designed digital micromirror engine system in this paper, which displays dynamic video images on the screen eventually. The display results show, the self-designed engine system can successfully drive the advanced digital micromirror. Compared to the traditional digital micromirror drive solution, the solution in this paper is more flexible, reconfigurable and can realize interactive projection display, which is the future development direction of the projection display.Furthermore, the research outputs in this paper can give other groups who are studying digital micromirror devices and the DLP related technologies, some references and inspirations. They will help to promote the future development of DLP projection display technology.