Patent ID: 7629968
Filing Date: 2009-12-08
Classification: G06F

Abstract:
1. A system for a touch screen display system, comprising: light beam focusing components operable to direct light from a top surface of a touch screen display to imagers operable to capture images using the directed light; a processing unit operable to receive the one or more captured images and determine positional information for an input device positioned on or near the top surface of the touch screen display using at least one captured images; and one or more light sources operable to emit light towards the top surface of the touch screen display; wherein the imagers comprise a fist imager and a second imager and the light beam focusing components comprise a first collimating lens positioned in a first optical path between a first light source and the first imager and a second collimating lens positioned in a second optical path between a second light source and the second imager; and wherein the first and second imagers and the first and second collimating lenses are constructed below the touch screen display and the light beam focusing components further comprise a first reflector assembly positioned between the first light source and the first collimating lens and a second reflector assembly positioned between the second light source and the second collimating lens.