Patent ID: 7144116
Filing Date: 2006-12-05
Classification: G03B

Abstract:
1. A digital light processing (DLP) projection device, comprising: a light source for providing a light; a splitter module disposed in an light path of the light after the light source, wherein the light is separated into a plurality of color lights by the splitter module, the color lights comprise a first color light, a second color light and a third color light and the splitter module comprises a first two-way splitter mirror disposed in the light path of the light after the light source, and a second two-way splitter mirror, disposed in a light path of the second color light and the third color light after the first two-way splitter mirror, wherein the first two-way splitter mirror reflects the first color light and allows the second color light and the third color light to penetrate, and the second two-way splitter mirror reflects the second color light and allows the third color light to penetrate; a plurality of total internal reflection (TIR) prisms disposed in a plurality of light paths of the color lights after the splitter module respectively, wherein each of the TIR prism comprises a total reflection plane; a plurality of digital mirror devices disposed in a plurality of light paths of the color lights after the TIR prisms respectively, wherein the color lights are reflected to the digital mirror devices via the total reflection planes respectively, and then the color lights are reflected by the digital mirror devices respectively and pass through the TIR prisms directly; a combiner disposed in an intersection of a plurality of light paths of the color lights passing through the TIR prisms; and a projection lens, disposed in a light path of the color lights after the combiner.