Answers:
我认为您的笔记本电脑装有光传感器。您是否已经尝试过以下步骤:
按Windows(Image:icon_Windows8_key.png)键+ C打开您的超级按钮。
Select the Settings charm, and then click Change PC settings..
Tap or click on PC and devices, then select Power and sleep.
Locate Adjust my screen brightness automatically.
如果不存在此设置,则说明您的设备未配备光传感器。
Tap to slide the slider under this option to On or Off
depending on your preference.