Channel waveguide system for sensing touch and/or gesture
First Claim
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1. An apparatus comprising:
- at least one channel waveguide configured for use with an interactive display having a user interface surface that includes a viewing area, wherein at least a portion of the channel waveguide is disposed within the viewing area, proximate to and substantially parallel to the user interface surface, the at least one channel waveguide being configured to propagate light or other electromagnetic energy in an evanescent state;
a source of a first signal input to the channel waveguide; and
at least one detector configured to receive, from the channel waveguide, a second signal corresponding to the first signal, and to output to a processor a third signal indicative of a position of an object proximate to or in contact with the channel waveguide, whereinthe channel waveguide is configured to receive the light or other electromagnetic energy from the source, and has a longitudinal axis, dimensions of the channel waveguide transverse to the longitudinal axis being approximately equal to a wavelength of the light or other electromagnetic energy; and
the light or other electromagnetic energy in the evanescent state is optically coupled with the object.
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Abstract
This disclosure relates to a channel waveguide, at least a portion of which is disposed within a viewing area of an interactive display, proximate to and substantially parallel to a user interface surface of the interactive display. A source of a first electromagnetic or acoustic signal is input to the channel waveguide. At least one detector is configured to receive, from the channel waveguide, a second signal corresponding to the first signal and to output a third signal indicative of a position of an object proximate to the channel waveguide.
19 Citations
17 Claims
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1. An apparatus comprising:
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at least one channel waveguide configured for use with an interactive display having a user interface surface that includes a viewing area, wherein at least a portion of the channel waveguide is disposed within the viewing area, proximate to and substantially parallel to the user interface surface, the at least one channel waveguide being configured to propagate light or other electromagnetic energy in an evanescent state; a source of a first signal input to the channel waveguide; and at least one detector configured to receive, from the channel waveguide, a second signal corresponding to the first signal, and to output to a processor a third signal indicative of a position of an object proximate to or in contact with the channel waveguide, wherein the channel waveguide is configured to receive the light or other electromagnetic energy from the source, and has a longitudinal axis, dimensions of the channel waveguide transverse to the longitudinal axis being approximately equal to a wavelength of the light or other electromagnetic energy; and the light or other electromagnetic energy in the evanescent state is optically coupled with the object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification