小米手机隐藏技能解锁：屏下指纹变前摄-快科技-科技改变生活

小米手机隐藏技能解锁：屏下指纹变前摄

万南
2020年08月11日 16:58
0

当前，多数屏下指纹手机使用的光学方案，简单来说，OLED屏幕发出光线将手指区域照亮，照亮指纹的反射光线透过屏幕像素的间隙返回到紧贴于屏下的传感器上。获取的指纹图像与手机初次录入的图像进行对比，最后进行识别判断。

这里的传感器其实就包含CMOS，简单来说也算一枚小相机。

循着这样的思路，有国外网友找到了Activity Launcher这款APP，轻松打开了小米9T自带汇顶指纹模块的调试模式，于是一颗新的前置镜头被解锁了。

由于该CMOS主要采集指纹信息，所以画面像素较低，几乎没有可用性。

小米手机隐藏技能解锁：屏下指纹变前摄

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