15.1: A New LC Rear‐Projection Display Based on the “Color‐Grating Method”

We have developed a rear-projection display with a novel color separation system, so called the Color Grating Method, comprised of the diffraction grating and the single-LC panel. This method realizes the higher brightness and well chromaticity compared with the conventional optical engine using single-LC with color filter. Further, we developed a new polarization converter system, using a prism array that consists of several small prisms. A prism array combines both orthogonal polarized light, therefore our optical engine can efficiently utilize a luminosity of a light source. The LC rear-projection display based on these technologies realized the lower costs and light weight, a slim body and good performance.