Hybrid force sensitive touch devices
First Claim
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1. A hybrid touch and force sensing apparatus, comprising:
- a touch panel having one or more sensors adapted to determine coordinates of a received touch;
one or more force-based touch sensors coupled to the touch panel; and
a processor;
whereinthe touch panel outputs the coordinates of the received touch to the processor and the one or more force-based touch sensor outputs sensors output a z-force coordinate to the processor;
the processor divides the touch panel into a plurality of zones, determines which of the plurality of zones received the touch, retrieves a predetermined compensation factor for a determined zone, and applies the predetermined compensation factor to the z-force coordinate; and
the predetermined compensation factor is based on a distance between the coordinates of the received touch and the one or more force-based touch sensors.
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Abstract
A hybrid touch-screen display that integrates force-based touch-screen technology with any one from among a group of projective capacitive, surface capacitive, resistive, digital resistive, SAW, IR, APR, DST, optical and electromagnetic touch-screen technologies to provide an ability to compensate for non-perfect force transfer. An alternate implementation is also disclosed that employs a single force sensor for relative force measurement in a system in which force is traditionally not measured, here a water dispenser unit. This allows compensation for varying static loads, run-time calibration, and filtering of extraneous loads through firmware.
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Citations
17 Claims
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1. A hybrid touch and force sensing apparatus, comprising:
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a touch panel having one or more sensors adapted to determine coordinates of a received touch; one or more force-based touch sensors coupled to the touch panel; and a processor;
whereinthe touch panel outputs the coordinates of the received touch to the processor and the one or more force-based touch sensor outputs sensors output a z-force coordinate to the processor; the processor divides the touch panel into a plurality of zones, determines which of the plurality of zones received the touch, retrieves a predetermined compensation factor for a determined zone, and applies the predetermined compensation factor to the z-force coordinate; and the predetermined compensation factor is based on a distance between the coordinates of the received touch and the one or more force-based touch sensors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for calculating an amount of force provided on a touch panel of an electronic device, the method comprising:
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determining, using one or more sensors, coordinates of a touch received on the touch panel; determining a force component of the received touch using one or more force sensors; dividing the touch panel into a plurality of zones; determining which of the plurality of zones received the touch; retrieving a predetermined compensation factor for a determined zone in the plurality of zones; and applying the predetermined compensation factor to the force component; wherein the predetermined compensation factor is based on a distance between the coordinates of the touch and the one or more force sensors. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification