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Systems and Methods for Press Detectors

A detector system, pressure technology, applied in the measurement, instrument, measuring force, etc. of the property force of piezoelectric devices

Inactive Publication Date: 2018-07-17
INTERLINK ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a disadvantage of many piezoelectric materials such as PVDF is that they also respond to temperature changes, and the pyroelectric coefficient usually corresponds to its piezoelectric coefficient

Method used

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  • Systems and Methods for Press Detectors
  • Systems and Methods for Press Detectors
  • Systems and Methods for Press Detectors

Examples

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Embodiment approach

[0050] According to an exemplary embodiment of the disclosed technology, for example, thermistor R8 can be used to measure the ambient temperature at or near the piezoelectric element, so that microcontroller U3 can use the thermistor R8 signal to compensate the received and The temperature-dependent signal comes from the piezoelectric element. Piezoelectric sensor element output is usually proportional to temperature, ie has a positive temperature coefficient. Thus, microcontroller U3 and embedded firmware can use such temperature compensation to further differentiate various signal parameters and / or switching conditions based on temperature. For example, if there are thermal cycles (which tend to cause relatively slowly varying responses), the firmware can be used to distinguish between thermal cycles, different types of pushes, momentary pushes, etc. In certain example embodiments, accidental pushes may be further differentiated from intentional pushes, for example, by set...

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Abstract

Certain example embodiments include a press sensor element that includes a piezoelectric layer having a first surface in communication with a first layer, the first layer including a first conductiveregion, where the first conductive region covers at least a central portion the first surface. The sensor element includes a second surface in communication with a second layer, the second layer including a second conductive region, a third conductive region, and a first non-conductive void region separating the second conductive region and the third conductive region. An area of the first conductive region is configured in size relative to an area of the third conductive region to substantially reduce a thermally-induced voltage change between two or more of the first, second, and third conductive regions responsive to a corresponding temperature change of at least a portion of the piezoelectric layer.

Description

[0001] Cross-reference related patent applications [0002] This application is a continuation-in-part of U.S. Patent Application No. 14 / 987,907, filed January 5, 2016, and entitled "System and Method for Press Force Detector." U.S. Patent Application No. 14 / 987,907 is a continuation-in-part of the No. 14 / 907 published on September 18, 2014 as U.S. Patent Application Publication No. US20140260679 entitled "System and Method for Common-Mode Signal Cancellation in Press Force Detectors" Priority to U.S. Patent Application No. 204,217, U.S. Patent Application No. 14 / 204,217 claims the benefit of U.S. Provisional Patent Application No. 61 / 777,231, filed March 12, 2013, entitled "Pyroelectric Common Mode Cancellation," the content of which is hereby Incorporated by reference in its entirety. Background technique [0003] Human-machine interfaces typically use press force detectors that can receive touch input to interact with digital content, machine controls, and more. Press for...

Claims

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Application Information

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IPC IPC(8): G01L1/16G01L1/26G06F3/041G06F3/044
CPCG01L1/16G01L1/26G06F3/0416G06F3/044
Inventor 卢志伟杰弗里·R·贝克爱德温·凯谢什·尤萨菲安德克兰·克里斯多夫·弗兰纳里
Owner INTERLINK ELECTRONICS