Patent ID: 7350928

Claim:
A projection display system, comprising: an illumination device, providing an unparallel illumination beam; a reflective light valve, used for processing said illumination beam to generate a modulated beam; a prism assembly, installed between said illumination device and said reflective light valve, and having a curved beam choosing surface, said curved beam choosing surface reflecting said illumination beam incident into said prism assembly from said illumination device, and allowing said modulated beam reflected by said reflective light valve to be passed through; and a collimating means, installed between said prism assembly and said reflective light valve to transform said unparallel illumination beam incident into said prism assembly to a parallel illumination beam; said illumination beam being incident into said prism assembly, passed through said collimating means after being reflected by said curved beam choosing surface and then incident on said reflective light valve, said modulate beam being generated after the process of said reflective light valve, finally, said modulated beam being passed through said collimating means and said curved beam choosing surface and projected into a projection lens.