Integrated force sensitive lens and software
First Claim
1. A software method for improving touch precision of a differential force-sensor touchscreen, comprising a software module for linearization and homogenization of sensor data.
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Accused Products
Abstract
A software compensation method that allows a touch sensitive display to be built using low-cost FSR force sensors The compensation method comprises an array of functional compensation modules including filtering, voltage conversion, temperature compensation, humidity compensation, sensor calibration, sensor reading linearization, auto calibration, positioning determination and finally end-user and mechanical calibration. The array of compensation modules can bring system accuracy from a non-compensated average positioning error in the 25% to 50% range, down to aN end-user acceptable range of 0% to 5%. The increased positioning accuracy makes it possible to use FSRs as opposed to traditional piezoresistive based touch screen sensors.
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Citations
34 Claims
- 1. A software method for improving touch precision of a differential force-sensor touchscreen, comprising a software module for linearization and homogenization of sensor data.
- 12. A software method for improving touch precision of a differential force-sensor touchscreen, comprising a software module for compensation of sensor data.
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26. A differential-force touchscreen display for a portable electronic device, comprising:
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a display module from among a group including an LCD display module, OLED display module, touch lens module or touch pad module; a plurality of FSR force sensors in operative contact with said display panel; a processor in communication with said FSR force sensors, said processor having associated memory; a software program resident in said processor memory or external memory accessible to the processor, for improving touch precision of said touchscreen, said software comprising a function for linearization and homogenization of sensor data. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A differential-force touchscreen display for a portable electronic device, comprising:
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a display module; an FSR force sensor; a plastic housing enveloping said FSR force sensor and maintaining operative contact with said display module, said plastic housing imparting a compressive preload on said force sensor.
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Specification