Patent ID: 9471170
Filing Date: 2016-10-18
CPC Classification: G06F

Claim Text:
1. A touch screen comprising: a housing; a display mounted in said housing; a plurality of emitter lenses mounted in said housing along a common edge of said display; a plurality of light pulse emitters mounted in said housing, each emitter emitting wide light pulses through a respective one of said emitter lenses over said display; a plurality of receiver lenses mounted in said housing and arranged so as to be shift-aligned relative to said emitter lenses, such that wide light pulses transmitted through neighboring emitter lenses enter a common receiver lens, and wide light pulses transmitted through an emitter lens enter neighboring receiver lenses; a plurality of light pulse receivers mounted in said housing, each receiver receiving portions of the transmitted wide light pulses through a respective one of said receiver lenses, and outputting received light intensities in accordance with the portions of the wide light pulses that they receive, each receiver R having an expected output, denoted EXPECTED OUTPUT(E, R), when emitter E is activated and no object blocks its wide light pulse, and an actual output, denoted ACTUAL OUTPUT(E, R); and a calculating unit, mounted in said housing and connected to said receivers, that calculates a coordinate, along a first dimension, of a location of an object touching said display, by identifying sub-areas of the display in which the object is at least partially located, each sub-area, denoted Area(E, R), corresponding to the section of light emitted by an emitter E that arrives at a receiver R, assigning a respective coordinate to each thus-identified sub-area Area(E, R), and calculating a weighted average of the thus-assigned coordinates, wherein each coordinate's weight in the average is determined from a known distribution of intensities of the light emitted by emitter E, based on the difference