Disclosed is a digital micromirror device (DMD) based projector in which the position of a stylus with respect to a projected image can be determined automatically. In one embodiment, the stylus includes a detector capable of detecting illumination from a single pixel and the plurality of pixels in the...http://www.google.es/patents/US5612736?utm_source=gb-gplus-sharePatente US5612736 - Stylus position sensing and digital camera with a digital micromirror device
Stylus position sensing and digital camera with a digital micromirror device
