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苹果手机便上那一圈金属有什么用
更新时间: 2020-06-30 00:00:00  

1、此金属圈是生物静电环,最早使用于iPhone5s的home键上;

2、是用来感应使用者是否将手指放置在识别感应器上,来检测生物是否为活的;

3、指纹识别时的步骤,检测手指放上去,打开指纹识别功能,为手指提供导电回路。

关键词: 苹果 手机 金属 什么

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