Hybrid Force Sensitive Touch Devices
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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.
23 Citations
26 Claims
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1-18. -18. (canceled)
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19. A hybrid touch-screen display, comprising:
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a touch panel having one or more sensors adapted to determine coordinates of a received touch; and at least one force-based touch sensor coupled to the touch panel; whereby the touch panel outputs the coordinates of the received touch to a processor and the at least one force-based touch sensor outputs a z-force coordinate to the processor such that the processor applies a compensation factor to the z-force coordinate based, at least in part, on the coordinates of the received touch. - View Dependent Claims (20, 21)
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22. A method for calculating an amount of force provided on a touch screen 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 screen; determining a force component of the received touch using a force sensor; and applying a compensation factor to the force component, wherein the compensation factor is based, at least in part, on the coordinates of the received touch. - View Dependent Claims (23, 24, 25)
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26. A touch-sensitive device, comprising:
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one or more force sensors for relative force measurement in a system in which force is traditionally not measured; and software for compensating said relative force measurement to calibrate for varying static loads and to filter extraneous loads.
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Specification