COLOR DISPLAY PROJECTION METHOD AND APPARATUS

摘要

A multi-DMD projection system uses an extended X-cube color splitting/recombining prism to implement splitting and recombining functions at different sections of the cube. Light directed from a white light source is split into red, green and blue components in a lower section of the cube. The components are directed to respective first, second and third DMDs for separate modulations and reentered into the X-cube prism by TIR prism for recombining at an upper section of the cube.

主权项

1. A multi-DMD projection system, comprising:
a light source; three DMD spatial light modulators; three TIR prisms; three light directing elements; a projection lens; and an X-cube color splitting/recombining prism having upper and lower sections, and front, rear, left and right side faces; the elements being relatively positioned and configured so that: at one of the upper and lower sections of the X-cube prism, light from the light source is directed into the front side face and split into three colors that are respectively directed out of the left, rear and right side faces; outside of the X-cube prism, the light directing elements respectively direct the three colors to corresponding respective ones of the DMD spatial light modulators for modulation; the TIR prisms respectively direct the three colors after modulation from the DMD spatial light modulators into corresponding respective ones of the left, rear and side faces; and at the other of the upper and lower sections, the modulated colors from the TIR prisms is recombined and the combined light is directed out of the front side face and projected by the projection lens.