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Signal correction method of piezoelectric sensor and electronic device

An electronic device and a voltage signal technology, which is applied to the signal correction method of piezoelectric sensors and the field of electronic devices, and can solve the problems of unrecognized pressing, pressure deviation, affecting the detection accuracy of piezoelectric sensors, etc.

Active Publication Date: 2019-12-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, the pressure determined by the mobile phone based on the voltage value V output by the piezoelectric sensor will deviate, which will affect the detection accuracy of the piezoelectric sensor, causing the piezoelectric sensor to be falsely triggered or fail to recognize the pressing operation.

Method used

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  • Signal correction method of piezoelectric sensor and electronic device
  • Signal correction method of piezoelectric sensor and electronic device
  • Signal correction method of piezoelectric sensor and electronic device

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Embodiment Construction

[0065] The implementation of this embodiment will be described in detail below in conjunction with the accompanying drawings.

[0066] The signal correction method of a piezoelectric sensor provided in the embodiment of the present application can be applied to mobile phones, smart home devices (such as smart TVs, smart speakers, smart air conditioners, smart refrigerators, etc.), tablet computers, notebook computers, netbooks, and personal digital assistants. (personal digital assistant, PDA), wearable electronic devices, vehicle-mounted devices, or virtual reality devices and other electronic devices, the embodiment of the present application does not impose any limitation on this.

[0067] Exemplarily, the above-mentioned electronic device may be a mobile phone 100 .

[0068] Such as figure 1 As shown, the mobile phone 100 may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130,...

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Abstract

The application provides a signal correction method of a piezoelectric sensor and an electronic device, relates to the technical field of terminals, can suppress a pyroelectric effect produced by thepiezoelectric sensor and improves the detection accuracy of the piezoelectric sensor. The electronic device includes a processor and a piezoelectric key. The piezoelectric key includes a first piezoelectric ceramic; and the positive electrode and the negative electrode of the first piezoelectric ceramic are respectively connected with the processor. In response to the press operation of a user acting on the piezoelectric key, the processor acquires a voltage signal V1 generated by the piezoelectric ceramic in the piezoelectric key. The processor removes a voltage signal V(s1) in the voltage signal V1 caused by the pyroelectric effect and then a corrected voltage signal V' is obtained. The processor identifies the press operation according to the voltage signal V'.

Description

technical field [0001] The present application relates to the field of terminal technologies, and in particular to a method for correcting signals of piezoelectric sensors and electronic equipment. Background technique [0002] Piezoelectric sensors are widely used in electronic devices such as mobile phones due to their piezoelectric effect. Among them, the piezoelectric effect means that when certain dielectrics are deformed by external forces in a certain direction, polarization will occur inside, and at the same time, opposite charges will appear on its two opposite surfaces. When the external force is removed, the dielectric returns to its uncharged state. [0003] That is to say, the piezoelectric sensor can convert the pressure signal into an electrical signal. Therefore, the mobile phone can determine the pressure when the user presses by detecting the electrical signal output by the piezoelectric sensor. However, some piezoelectric sensors have not only piezoelect...

Claims

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Application Information

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IPC IPC(8): G01L25/00G01L1/26G01L1/16
CPCG01L25/00G01L1/26G01L1/16
Inventor 徐新余田欣余恺姚建江廖宗勐
Owner HUAWEI TECH CO LTD