Patent ID: 8519983
Filing Date: 2013-08-27
Classification: G06F,H04N

Abstract:
1. A method, comprising: illuminating a scanning mirror in a scanning platform with a laser light source; modulating deflection of the scanning mirror to generate a raster scanning output beam that scans a trajectory in two dimensions; modulating the laser light source synchronous to movement of the scanning mirror to modulate the raster scanning output beam and illuminate pixels in the trajectory of the raster scanning output beam to project a displayed image; receiving a reflection of a selected pixel from a movable reflector placed in the trajectory of the raster scanning output beam at a location of the selected pixel in the displayed image; and correlating a timing of the reflection of the selected pixel with a timing of the raster scanning output beam to determine a coordinate position of said reflector within the displayed image; wherein the coordinate position includes an X position and a Y position, and correlating to determine the coordinate position comprises correlating a phase of the reflection of the selected pixel relative to a horizontal sync pulse to determine the X position, and determining the Y position from a timing delay between the reflection of the selected pixel and a vertical sync pulse.