Patent ID: 9645679
Date: 2017-05-09
CPC Classifications: G06F

Claim:
1. A touch screen assembly comprising: a display screen; a plurality of infra-red light emitters operative to emit light when activated; a plurality of photo diodes operative to detect amounts of light received when activated; a transparent plastic frame comprising: a processor coupled with said infra-red light emitters and said photo diodes, operative to selectively activate said infra-red light emitters and said photo diodes, to identify a location of an object touching said display screen from above, based on amounts of light detected by activated photo diodes when light emitted by activated infra-red light emitters is blocked along its light path by the object, and to recognize the object touching an outer wall of said frame facing away from said display screen, based on amounts of light detected by activated photo diodes when light emitted by activated infra-red light emitters is absorbed along its light path by the object at the outer wall, thereby providing touch sensitivity to said frame itself.