Patent ID: 9547386
Date: 2017-01-17
CPC Classifications: G02B,G06F

Claim:
1. A touch projection system, comprising: a screen; a micromirror device, the micromirror device comprising a base and a plurality of micromirrors arranged in an array on the base; a light source disposed toward the micromirror device; an image capturer disposed toward the micromirror device; and a processor, electrically connected to the micromirror device, the light source, and the image capturer, the processor controlling the light source to emit projection light, the processor controlling the micromirror to be selectively located at a first angled position, a second angled position, or a third angled position, the micromirror having a first normal direction, a second normal direction, and a third normal direction corresponding to the first angled position, the second angled position, and the third angled position, the processor controlling the image capturer to receive image light from the screen; wherein, when the micromirror is located at the first angled position, the projection light from the light source is reflected by the micromirror and travels in a first reflection direction to be projected onto the screen; when the micromirror is located at the second angled position, the image light from the screen travels to the micromirror in a reverse direction reverse to the first reflection direction, is reflected by the micromirror, and travels in a second reflection direction, and the second reflection direction and the first reflection direction are nonparallel; and when the micromirror is located at the third angled position, the image light from the screen travels to the micromirror in the reverse direction, is reflected by the micromirror, and travels in a third reflection direction to be received by the image capturer, and the third reflection direction is nonparallel to the first reflection direction and the second reflection direction.