Patent ID: 9552104
Date: 2017-01-24
CPC Classifications: G06F

Claim:
1. A method for determining simultaneous touch events on a surface, the surface having emitters and detectors arranged around its periphery, the emitters producing optical beams received by the detectors, the touch events disturbing the optical beam, the method comprising: determining, a priori, a set of touch event templates for a group of expected touch events, each touch event template for an expected touch event defined by at least two beams that would be disturbed by the expected touch event, where the beams that are interrupted by the expected touch event are ordered sequentially from 1 to N and an n-beam template is defined by selecting the first n beams in the order, N and n are integers, and n is between 1 and N inclusive; receiving information indicating which beams have been disturbed by actual touch events; and comparing the received information to the touch event templates, to determine the actual touch events.