Patent ID: 8400406
Filing Date: 2013-03-19
Classification: G06F

Abstract:
1. In a touch screen system comprising two perpendicular axes populated with opposing photo emitters and photo receivers, the improvement wherein the system comprises a controller that controls pulsing of the photo emitters, polls an analog output from the photo detectors, decodes the analog output from the photo detectors, and reports corresponding coordinates to a host computer, and a series of daughter boards daisy chained together that include a chain of emitter boards, each emitter board having the capability of receiving data control signals from the controller or another emitter board, and each emitter board having the capability of transmitting said data control signals to other emitter boards in the chain, and a chain of receiver hoards, each receiver board having the capability of receiving and sending data control signals from the controller or a receiver board, and each having the capability of transmitting said data control signals to other receiver boards in the chain.