Temperature compensating sensor having a compliant layer separating independent force sensing substrates and sense circuitry to obtain a relative measure between the force sensing substrates
US10466829B2 · kind B2 · utility
2Cited by
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14Claims
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Key dates
| Filing date | Jun 26, 2017 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Sep 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04111
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical force sensor that may compensate for environmental effects, including, for example, variations in temperature of the device or the surroundings. In some examples, two force-sensitive layers are separated by a compliant layer. The relative electrical response of the two force-sensitive layers may be used to compute an estimate of the force of a touch that reduces the effect of variations in temperature. In some examples, piezoelectric films having anisotropic strain properties are used to reduce the effects of temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.