Patent ID: 9160992
Filing Date: 2015-10-13
Classification: G03B,H04N

Abstract:
1. A projection apparatus, comprising: a light source module, outputting a plurality of illumination beams having different transmission paths; and a micro-electro-mechanical-system (MEMS) mirror, disposed on the transmission paths of the illumination beams, wherein each of the illumination beams propagates to the MEMS mirror and is reflected by the MEMS mirror to project on a plurality of positions within an imaging region, wherein the transmission paths of the plurality of illumination beams transmitted from the light source module to the MEMS mirror are not intersected with the imaging region, wherein the imaging region is divided into a plurality of sub imaging regions arranged in an array, each of the illumination beams propagates to the MEMS mirror and is reflected by the MEMS mirror to one of the sub imaging regions to project a display dot, wherein each of the display dots located in different positions forms an overlapping projection region, a ratio of an area of the overlapping projection region to an area of the imaging region is C %, an image luminance of the imaging region is A lumen, an acceptable luminance of the illumination beam directly incident on a human eye under a safety limit is X lumen, and C %, A and X satisfy an expression of: