Temperature Compensation for Transparent Force Sensors

摘要

An optically transparent force sensor element compares a force reading from a first strain-sensitive film element with a second strain-sensitive film element, having a compliant and thermally conductive intermediate layer positioned therebetween to compensate for temperature changes. While in the idle state, the optically transparent force sensor can be periodically calibrated to account for additional changes in temperature.

主权项

1. An electronic device comprising:
an input surface comprising:
a substrate;a first sensor coupled to the substrate and formed from a material with a strain-sensitive electrical property;a second sensor coupled to the substrate and separated from the first sensor by a selected distance, the second sensor formed from a material with a strain-sensitive electrical property; and a controller configured to obtain a differential measurement of the electrical property of the first sensor and the electrical property of the second sensor.