超薄前投激光显示系统研制

Ultra-thin front projector for laser display system

为了解决光学系统投影厚度过大问题,采用自由曲反射面结合非球面设计方法设计出超短距离、超广角投影显示系统,其屏幕投影距离小于20cm。为解决激光色域系统转换,建立了激光三基色与荧光粉三基色色域变换与扩展的理论模型并搭建了基于DSP高速图像处理芯片为核心的颜色变化实时硬件处理试验开发系统。通过该系统可以调试不同颜色系统转换算法,验证转换模型的正确性,并为实现专用颜色转模块提供了开发平台。

In order to solve the problem of larger projection thickness in optic system, an ultra- short-distance and ultra-wide-angle projection display system was designed by using the method of combining the free-form surface mirror with the aspheric surface. The projection distance was less than 20cm. The color gamut transformation and expansion model of laser and phos- phor tricolor was built theoretically, and the real-time processing development hardware sys- tem for color transformation was set up using the digital micromirror device （DMD） chip as the spatial light modulator. This system can debug algorithms for varied color system transforma-ions, verify the transformed model and provide a platform for developing specific color trans-form module.