Patent ID: 8217900
Filing Date: 2012-07-10
Classification: A61F,G06F

Abstract:
1. A light activated peripheral standalone input device to be used in and out of sunlight, comprising: a top cover with a plurality of semi-transparent locations with key indicia; said key indicia are fixed in location; said key indicia are associated with a key code; said key indicia are associated in location to each of said plurality of said semi-transparent locations; a plurality of light emitters and a plurality of light detectors arranged in a matrix associated in location to each of said plurality of said semi-transparent locations; said plurality of light detectors and said plurality of light emitters are disposed on a printed wiring board; said printed wiring board is aligned with a bottom cover; a processing means disposed on said printed wiring board with a program and associated circuitry to scan each of said plurality of light emitters and said plurality of light detectors; said processing means scans said plurality of light detectors and stores an ambient baseline reading of amplitude to be used for reference for detecting said light beam in sunlight or out of sunlight; wherein when a light beam is positioned over one of said plurality of light detectors said light beam is detected and said processing means communicates said key code to a host; and whereas all scanning resultant to obtain said key code is within said processing means.