持续暴露于电子设备发出的蓝光会导致视觉问题并破坏您的睡眠模式。在Windows 10上，夜灯(Night Light)功能可通过减少计算机显示屏的蓝光发射来防止数字眼睛疲劳并提高睡眠质量。(prevents digital eye strain and improves sleep quality)
尽管它有好处，但有时该功能会出现故障。如果您在此页面上是因为Windows 10 夜灯(Night Light)无法在您的Windows 10计算机上运行，请尝试下面列出的潜在解决方案。
1.检查夜灯时间表
如果您将Windows配置为自动激活夜灯(Night Light)但它没有，请检查您的夜灯(Night Light)计划设置并确认小时数。转到设置(Settings )>系统(System)>显示(Display )，然后单击夜灯设置(Night light settings)。
选择 Windows 预设的“日落到日出”时间表意味着夜灯(Night Light)将在每天晚上 7:30 开启，并在早上 6:30 关闭。如果您选择设置自己的自定义时间，请确保在提供的框中输入准确的时间。
2.调整夜灯强度
启用Windows 10(Windows 10) 夜灯(Night Light)后，您的屏幕看起来是否一样？当您打开夜灯时， (Night Light)Windows 是否(Does Windows)无法显示暖色？
那可能是因为您已将夜灯(Night Light)强度降至最低。转到设置(Settings )>系统(System)>显示(Display )>夜灯设置(Night light settings)，然后将强度(Strength)滑块向右移动以增加暖色的强度。
3.开启定位服务
夜灯(Night Light)是需要位置访问才能以最佳方式工作的众多Windows功能之一。(Windows)如果预设的“日落到日出”计划选项显示为灰色，这很可能是因为您的 PC 上禁用了位置访问。
前往“设置”(Settings) > “隐私(Privacy)” > “位置(Location)”以检查您设备的位置设置。单击更改(Change)按钮并打开此设备的位置访问权限(Location access for this device)。
滚动到“允许应用访问您的位置”部分并打开该选项。
返回夜灯(Night Light)设置菜单并检查您是否可以使用“日出(Sunrise)到日落”时间表。
4. 检查日期和时间设置
如果日期、时间或时区设置不准确，您的计算机可能会出现很多问题。您的浏览器可能无法加载某些网页、Microsoft Store 无法下载应用(Microsoft Store won’t download apps)等。如果您的 PC 的日期和时间设置不正确，其他Windows应用程序和功能（例如夜灯(Night Light)）也可能出现故障。
为防止这些情况发生，请前往设置(Settings)>时间和语言(Time & Language)>日期和时间(Date & time)并打开这两个选项：自动设置时间和自动(Set time automatically)设置时区(Set time zone automatically)。
之后，单击“同步您的时钟”部分中的立即同步按钮。(Sync now)这将触发您的计算机从Windows 时间服务器(Windows Time Server)获取准确的日期和时间信息。
5.重启你的电脑
如果问题是由于操作系统的临时故障引起的，重新启动计算机可能有助于将Night Light恢复正常。在重新启动设备之前，请尝试退出您的个人资料/帐户并重新登录 - 按Windows按钮，单击您的个人资料图标，然后选择退出(Sign out)。如果您重新登录时Windows 10(Windows 10) 夜灯(Night Light)仍然无法工作，请重新启动您的计算机。
6.更新或重新安装显示驱动程序(Reinstall Display Driver)
如果您的计算机的图形/显示驱动程序已过时、损坏或有故障，您可能会在使用夜灯(Night Light)时遇到困难。如果在尝试上述建议后问题仍然存在，update or reinstall your graphics/display drive。
注意：(Note:) Windows 10夜灯(Night Light)不适用于使用DisplayLink图形驱动程序或 Microsoft基本显示(Basic Display)驱动程序的设备。如果您使用这些驱动程序中的任何一个，请访问您的 PC 制造商的网站以下载不同的图形驱动程序。
右键单击(Right-click)开始菜单(Start Menu)图标（或按Windows键 + X），然后在快速访问菜单上选择设备管理器。(Device Manager)
展开显示(Display)适配器部分，右键单击图形驱动程序，然后选择更新驱动程序(Update driver)。
单击自动搜索更新的驱动程序软件(Search automatically for updated driver software)。
Windows将扫描您的计算机和 Internet 以获取图形驱动程序的更新版本。如果Windows未找到任何可用更新，请返回设备管理器(Device Manager)并卸载图形驱动程序。
不用担心，您不会破坏计算机上的任何内容；当您重新启动 PC 时， Windows(Windows)将自动重新安装干净、无错误的驱动程序副本。
右键单击(Right-click)驱动程序并选择卸载设备(Uninstall device)。
取消选中“删除此设备的驱动程序软件”选项，然后单击卸载(Uninstall)。
提示时重新启动计算机。单击“是”之前，请确保关闭所有活动程序，以免丢失未保存的数据。
7. 重置Windows 10 夜灯设置(Night Light Settings)
操作中心(Action Center)和Windows 设置(Windows Settings)中的夜灯(Night Light)选项是否灰显？您是否尝试了所有可能的修复方法但无济于事？前往(Head)Windows 注册表(Windows Registry)并重置夜灯功能(Night Light)。
注意：(Note:) Windows注册表(Windows Registry)是敏感文件和设置的数据库。损坏任何注册表文件可能会损坏Windows 操作系统(Windows OS)并导致您的计算机出现故障。因此，在尝试更改注册表之前备份注册表非常重要。有关备份和恢复 Windows 注册表的信息，(guide on backing up and restoring the Windows Registry)请参阅本指南。
启动Windows 运行(Windows Run)框（Windows键 + R），在对话框中键入regedit ，然后单击(regedit)OK。
将此路径粘贴到注册表编辑器的地址栏中，然后按Enter。
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Cloud
在左侧边栏中，找到并删除这两个子文件夹：$$windows.data.bluelightreduction.bluelightreductionstate和$$windows.data.bluelightreduction.settings。
只需(Simply)右键单击文件夹并选择Delete。
关闭注册表编辑器(Registry Editor)并重新启动计算机。
8. 更新视窗
显然，Windows 10 版本 1903 中存在一个已知错误(known bug in version 1903 of Windows 10)，导致夜灯(Night Light)出现故障。在Windows 搜索(Windows Search)栏中键入winver ，然后按(winver)Enter以检查设备上安装的Windows版本。
如果您运行的是 1903 版（或更早版本），请转至设置(Settings)>更新和安全(Update & security)> Windows 更新(Windows Update)以更新您的计算机。
即使您没有运行 1903 版，您仍应安装设置菜单中可用的任何官方更新。始终保持计算机更新可以提高性能并修复其他隐藏问题。
保护你的眼睛
如果Windows 10 夜灯(Night Light)无法关闭、在激活时无法温暖您的显示器，或者在不应该的情况下随机开启，这些故障排除技术将使该功能再次正常工作。
Windows 10 Night Light Not Working? 8 Ways to Fix
Constant exposure to blue light from electronic devices can cause visual problems and rυin your sleep pattеrn. On Windows 10, the Nіght Light feature prevents digital eye strain and improves sleep quality by reducing blue light emission from your computer’s display.
Despite its benefits, there are times when the feature malfunctions. If you’re on this page because Windows 10 Night Light is not working on your Windows 10 computer, try the potential solutions listed below.
1. Check Night Light Schedule
If you configured Windows to activate Night Light automatically but it doesn’t, check your Night Light schedule settings and confirm the hours. Go to Settings > System > Display and click Night light settings.
Choosing Windows’ preset “Sunset to sunrise” schedule means Night Light will come on by 7:30 PM every day and go off 6:30 AM in the morning. If you choose to set your own custom hours, make sure you enter the accurate time in the provided boxes.
2. Adjust Night Light Strength
Does your screen look the same after enabling Windows 10 Night Light? Does Windows fail to display a warm color when you toggle on Night Light?
That could be because you’ve reduced the Night Light strength to the minimum. Go to Settings > System > Display > Night light settings and move the Strength slider to the right to increase the intensity of the warm color.
3. Turn on Location Services
Night Light is one of the many Windows features that require location access to work optimally. If the preset “Sunset to sunrise” schedule option is greyed out, that’s most likely because location access is disabled on your PC.
Go to Settings > Privacy > Location to check your device’s location settings. Click the Change button and toggle on Location access for this device.
Scroll to the “Allow apps to access your location” section and toggle on the option.
Return to the Night Light settings menu and check if you can use the “Sunrise to sunset” schedule.
4. Check Date and Time Settings
A lot can go wrong on your computer if the date, time, or timezone settings are inaccurate. Your browser may fail to load certain webpages, Microsoft Store won’t download apps, and so on. Other Windows apps and features (Night Light, for example) may also malfunction if your PC’s date & time settings are incorrect.
To prevent these from happening, head to Settings > Time & Language > Date & time and toggle on these two options: Set time automatically and Set time zone automatically.
Afterward, click the Sync now button in the “Synchronize your clock” section. That’ll trigger your computer to obtain accurate date & time information from the Windows Time Server.
5. Restart Your Computer
If the problem is due to a temporary glitch with your operating system, rebooting your computer might help restore Night Light to normalcy. Before you restart your device, try signing out of your profile/account and signing back in—press the Windows button, click on your profile icon, and select Sign out. Reboot your computer if Windows 10 Night Light still doesn’t work when you sign back in.
6. Update or Reinstall Display Driver
You may encounter difficulties using Night Light if your computer’s graphic/display driver is outdated, broken, or buggy. If the problem persists after trying the recommendations above, update or reinstall your graphics/display drive.
Note: Windows 10 Night Light does not work on devices using a DisplayLink graphic driver or Microsoft’s Basic Display driver. If you use either of these drivers, visit your PC manufacturer’s website to download a different graphics driver.
Right-click the Start Menu icon (or press Windows key + X) and select Device Manager on the Quick Access menu.
Expand the Display adapters section, right-click the graphics driver, and select Update driver.
Click Search automatically for updated driver software.
Windows will scan your computer and the internet for an updated version of your graphics driver. If Windows doesn’t find any available update, return to the Device Manager and uninstall the graphics driver.
Don’t worry, you won’t break anything on your computer; Windows will automatically reinstall a clean, error-free copy of the driver when you reboot your PC.
Right-click on the driver and select Uninstall device.
Leave the “Delete the driver software for this device” option unchecked and click Uninstall.
Restart your computer when prompted to. Before you click Yes, make sure you close all active programs so you don’t lose unsaved data.
7. Reset the Windows 10 Night Light Settings
Is the Night Light option grayed out in the Action Center and Windows Settings? Have you tried all possible fixes but to no avail? Head to the Windows Registry and reset the Night Light functionality.
Note: The Windows Registry is a database of sensitive files and settings. Damaging any registry file may corrupt the Windows OS and cause your computer to malfunction. Therefore, it’s important to make a backup of the registry before you attempt to make changes to the registry. Refer to this guide on backing up and restoring the Windows Registry.
Launch the Windows Run box (Windows key + R), type regedit in the dialog box, and click OK.
Paste this path below in the Registry Editor’s address bar and press Enter.
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Cloud
On the left sidebar, locate and delete these two subfolders: $$windows.data.bluelightreduction.bluelightreductionstate and $$windows.data.bluelightreduction.settings.
Simply right-click on the folder(s) and select Delete.
Close the Registry Editor and restart your computer.
8. Update Windows
Apparently, there’s a known bug in version 1903 of Windows 10 that causes the Night Light to malfunction. Type winver in the Windows Search bar and press Enter to check the Windows version installed on your device.
If you’re running version 1903 (or older), go to Settings > Update & security > Windows Update to update your computer.
Even if you aren’t running version 1903, you should still install any official update available in the settings menu. Keeping your computer updated at all times can improve performance and fix other hidden issues.
Keep Your Eyes Protected
If Windows 10 Night Light won’t turn off, fails to warm your display when activated, or randomly comes on when it’s not supposed to, these troubleshooting techniques would get the feature working correctly again.
