Near-contact optical touch-screen sensor module

Abstract

A near-contact optical touch-screen sensor module is disclosed in this invention. This sensor module includes a patterned light filtering top glass plate having an array of light filtering window slit holes as the locations for the sensor switches, a LED diode lightened light guide placed in parallel underneath the patterned light filtering top glass plate emitting out a uniform band of light beams transmitting through the window slit holes of the top glass plate, and a serial-scan linear image sensing array supported on a print circuit board having the photo-detecting elements placed closely underneath the neighbor of each of the window slit holes of the top glass plate. The output signals of the image sensing array will indicate if a particular window slit has been touched by the fingertip.

Dependencies are inferred from the claim text.