TOUCH SCREEN
First Claim
Patent Images
1. A method comprising:
- transmitting a pulse of terahertz radiation through a touch panel formed of a dielectric material such that the pulse generates a evanescent field in a region adjacent to a touch surface of the touch panel;
generating a reflected pulse from an object located within the region adjacent to the touch surface of the touch panel; and
triangulating a position of the object on the touch surface of the touch panel at least in part from the reflected pulse.
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Abstract
A method for determining the location of an object on a touch panel is provided. Initially, a pulse of terahertz radiation is transmitted through a touch panel, which formed of a dielectric material such that the pulse generates a evanescent field in a region adjacent to a touch surface of the touch panel. A reflected pulse is generated by an object located within the region adjacent to the touch surface of the touch panel, and a position of the object on the touch surface of the touch panel is triangulated at least in part from the reflected pulse.
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Citations
18 Claims
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1. A method comprising:
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transmitting a pulse of terahertz radiation through a touch panel formed of a dielectric material such that the pulse generates a evanescent field in a region adjacent to a touch surface of the touch panel; generating a reflected pulse from an object located within the region adjacent to the touch surface of the touch panel; and triangulating a position of the object on the touch surface of the touch panel at least in part from the reflected pulse. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a touch panel formed of a dielectric material that is configured to carry terahertz radiation and having a touch surface; and a touch controller that is optically coupled to touch panel, wherein the touch controller is configured to transmit a pulse of terahertz radiation through the touch panel so as to generate a evanescent field in a region adjacent to the touch surface, and wherein the touch controller is configured to receive a reflected pulse that is generated by an object located within the region, and wherein the touch controller is configured to triangulate a position of the object on the touch surface at least in part from the reflected pulse. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method comprising:
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transmitting a pulse of terahertz radiation through a touch panel formed of a dielectric material such that the pulse generates a evanescent field in a region adjacent to a touch surface of the touch panel; generating a plurality of reflected pulses, wherein a first reflected pulse is generated by a object located within the region adjacent to the touch surface of the touch panel; and triangulating a position of the object on the touch surface of the touch panel at least in part from the plurality of reflected pulses. - View Dependent Claims (15, 16, 17, 18)
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Specification