Touch-sensitive device and method for detection of touch
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United States of America Patent
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Aug 18, 2015
Grant Date -
Jun 27, 2013
app pub date -
Apr 7, 2011
filing date -
Apr 7, 2010
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Abstract
The present invention relates to a method and a device for detection of position of touch. The device comprises a waveguide, at least one light source, and at least one detector device. The waveguide has a touch-surface with a surface structure defining a pattern that defines active surface areas and passive surface areas. The pattern is distributed such that an object that contacts a first area will cause a different disturbance of light than an object that contacts a second area, and such that correct positions of a plurality of concurrent touches may be detected.
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