Patent ID: 9229308
Filing Date: 2016-01-05
CPC Classification: G03B,H04N

Claim Text:
1. A projection apparatus, comprising: a light source module, configured to provide an illumination beam; a light valve, disposed on a transmission path of the illumination beam to convert the illumination beam into an image beam; a projection lens, disposed on a transmission path of the image beam, wherein the light valve has a predetermined incident direction and a predetermined outgoing direction, and when the illumination beam is incident onto the light valve at the predetermined incident direction, the image beam propagates to the projection lens from the light valve at the predetermined outgoing direction; a total internal reflection (TIR) prism, disposed on the transmission path of the illumination beam between the light source module and the light valve, and located on the transmission path of the image beam between the light valve and the projection lens, wherein a first ray of the illumination beam emitted from the light source module, after going through the TIR prism, is incident onto the light valve at the predetermined incident direction; and a light condensing module, having an incident surface and a curving outgoing surface, wherein the illumination beam emitted from the light source module sequentially transmits through the incident surface and the curving outgoing surface and then propagates to the TIR prism, and an optical axis of the curving outgoing surface inclines with respect to a direction of the first ray of the illumination beam to enter the TIR prism, wherein the light valve is a digital micro-mirror device, the digital micro-mirror device comprises a plurality of micro mirrors rotating through an on-state angle to an off-state angle, wherein when any one of the micro mirrors rotates to be at the on-state angle, a normal line of the one of the micro mirrors is at a median-angle line between the predetermined incident direction and the predetermined outgoing direction.