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Anti-charge interference method and terminal device

A terminal device and consistent technology, applied in the field of communication, can solve problems such as fingerprint module unlocking failure, and achieve the effect of solving common mode interference, solving unlocking failure, and improving user experience.

Active Publication Date: 2018-09-28
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The embodiment of the present invention provides a method of anti-charging interference and a terminal device to solve the problem of unlocking the fingerprint module caused by charging the terminal device when improving or solving the problem in the prior art that the fingerprint module is unlocked when the terminal device is charging malfunctioning problem

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  • Anti-charge interference method and terminal device

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Embodiment Construction

[0029] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0030] The terms "first", "second" and the like in the description and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences other than those illustrated or described herein.

[0031] After analysis, it can be seen that the common-mode harmonic noise generated by the power adapter when the terminal device is charging is the root cause of the unlocking failure of the fingerprint module. In order to ensure the smooth unlocking of the fingerprint module during the ...

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Abstract

Embodiments of the invention provide an anti-charge interference method and a terminal device. The anti-charge interference method comprises the steps of obtaining first common mode noise intensity generated by a power adapter under a current scanning frequency of a fingerprint module when the power adapter charges the terminal device; judging whether the first common mode noise intensity is higher than preset common mode noise intensity or not; and when the first common mode noise intensity is higher than the preset common mode noise intensity, adjusting a switching frequency of the power adapter or the scanning frequency of the fingerprint module to reduce interference of the power adapter on the fingerprint module. According to the scheme, the problem of common mode interference on thefingerprint module during charge of the terminal device is solved, so that the problem of unlocking failure of the fingerprint module during improvement or solving of charge of the terminal device inan existing method is solved and the user experience effect is improved.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and terminal equipment for resisting charging interference. Background technique [0002] Fingerprints are widely used due to their uniqueness, lifetime invariance, and convenient collection. Especially as people pay more attention to information security, fingerprint modules have become standard equipment for terminal devices (such as mobile phones, tablets, and notebooks). [0003] As we all know, mobile terminal products such as mobile phones consume a lot of power, so they need to be charged frequently. The power adapter is generally a switching charger. During the charging process, the switching frequency of the switching charger is about 20kHz to 100kHz, and the electromagnetic interference of each harmonic generated by it is relatively large. When the harmonic frequency overlaps or is close to the scanning frequency of the fingerprint module (about 200kHz ...

Claims

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Application Information

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IPC IPC(8): G06F1/18G06K9/00
CPCG06F1/182G06V40/13
Inventor 谢大刚
Owner VIVO MOBILE COMM CO LTD
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