您的 Windows 10 屏幕是否会无缘无故自动变暗？您可能已在 PC 上启用了自适应亮度(brightness on your PC)，但您的屏幕自动变暗还有其他原因。
无论是什么原因造成的，您都可以对 PC 应用一些简单的修复程序来阻止它自动变暗。其中一种方法应该可以解决该问题。
禁用自适应亮度(Disable Adaptive Brightness)
Windows 10 附带一项称为自适应亮度的功能，可自动调整显示器的亮度。如果启用此选项，并且周围环境发生变化，Windows会自动使您的屏幕变暗。
在这种情况下，请关闭自适应亮度功能，看看您的问题是否得到解决。您可以随时重新打开此选项。
- 同时按Windows + I键打开 Windows 10 的设置应用程序。(Settings)
- 在设置窗口中选择系统。(System)
- 从左侧边栏的选项中选择显示。(Display)
- 在右侧窗格中，禁用“当照明变化时自动更改亮度(Change brightness automatically when lighting changes)”选项。
从现在开始，Windows 10 将不会自动增加或降低显示器的亮度。如果您的屏幕太暗或太亮，请使用“显示(Display)设置”菜单上的亮度滑块手动调整亮度级别。
删除最新的 Windows 10 更新(Remove the Latest Windows 10 Update)
一些用户报告说，他们的屏幕在安装Windows 更新(Windows update)后立即开始变暗。在这种情况下，您可以删除已安装的最新 Windows 10 更新。它可能会解决问题。
- 打开开始(Start)菜单，搜索控制面板(Control Panel)，然后在搜索结果中选择控制面板。(Control Panel)
- 在控制面板中，单击顶部的查看方式菜单并选择(View by)类别(Category)。
- 从屏幕上的可用选项中选择程序。(Programs)
- 在以下屏幕上的Programs and Features下，选择View installed updates选项。
- 您现在将看到计算机上已安装更新的列表。选择Installed On列并确保首先出现最新的更新。
- 在列表中选择最新的更新，然后选择顶部的卸载。(Uninstall)
- 在出现的提示中选择“是”以删除所选更新。(Yes)
- 删除更新后重新启动计算机。
如果您的屏幕在删除更新后没有变暗，则更新是罪魁祸首。
您可以在 PC 上的“设置”(Settings) > “更新和安全(Update & Security)” > “ Windows 更新”(Windows Update)路径中找到这些最新的 Windows 更新。
检查启动程序列表(Check the Startup Programs List)
如果您的 Windows 10 屏幕在启动计算机几秒钟后变暗，则可能是启动程序造成的。(startup program)您的系统在启动时会加载许多程序，因此值得检查此程序列表以查找任何可疑项目。
- 访问开始(Start)菜单，搜索设置(Settings)，然后在搜索结果中选择设置。(Settings)
- 在设置窗口中选择应用程序。(Apps)
- 在左侧边栏上，选择Startup。
- 在右侧，所有带有On开关的程序都可以在计算机启动时启动。
- 关闭此列表中的所有或仅可疑程序。可疑程序基本上是您在屏幕问题开始出现之前最近安装的程序。
- 重新启动计算机，看看问题是否消失。
使用电源疑难解答(Use Power Troubleshooter)
Windows 10 包含许多疑难解答程序，其中之一是电源疑难解答程序。有了这个，您可以在您的 PC 上找到并解决大多数与电源相关的问题，包括屏幕变暗问题。
要运行疑难解答：
- 打开计算机上的“设置”(Settings)应用。
- 在主设置屏幕上选择更新和安全。(Update & Security)
- 在左侧边栏中，选择疑难解答(Troubleshoot)。
- 选择右侧窗格中的其他疑难解答选项。(Additional troubleshooters)
- 在疑难解答列表中找到电源(Power)，选择它，然后选择运行疑难解答(Run the troubleshooter)。
- 等待(Wait)疑难解答程序检测并修复您的电源设置问题。
更新显卡驱动程序(Update the Graphics Card Drivers)
您的 Windows 10 PC 屏幕自动变暗的一个可能原因是您使用的是过时的图形驱动程序。图形(Graphics)驱动程序允许您的图形卡与系统交互，因此您应该始终保持这些驱动程序是最新的(keep these drivers up to date)。
如果您很长时间没有更新这些驱动程序，请按如下方式运行驱动程序更新。
- 打开开始(Start)菜单，搜索设备管理器(Device Manager)，然后在搜索结果中选择该选项。
- 选择显示适配器(Display adapters)以展开其菜单。
- 右键单击显示适配器(Display adapters)下的显卡，然后选择更新驱动程序(Update driver)。
- 在打开的窗口中，选择自动搜索驱动程序(Search automatically for drivers)选项。
- 允许(Allow)Windows 10 在您的计算机上查找并安装最新的图形驱动程序。
- 安装驱动程序后重新启动(Reboot)计算机。
关闭屏幕的省电模式(Turn the Screen’s Power Saving Mode Off)
如果您的视频或图形卡来自知名制造商，则很可能您的 PC 上安装了制造商工具。此工具可帮助您为您的卡设置各种选项(set up various options for your card)。
该工具可能为您的显卡启用了省电模式。在这种情况下，该模式会在一定时间后自动使您的屏幕变暗。
要解决此问题，只需关闭此实用程序中的省电选项即可。对于以下示例，我们将使用Intel实用程序来禁用省电模式。
- 访问开始(Start)菜单，搜索Intel Graphics Control Panel，然后在结果中选择该选项。
- 在实用程序的主屏幕上选择电源。(Power)
- 从左侧边栏中选择On Battery 。
- 在右窗格中的Display Power Saving Technology下，选择Disable。
- 选择底部的应用(Apply)以保存更改。
希望您的 Windows 10 PC 屏幕不再自动变暗。如果是这种情况，请在下面的评论中告诉我们哪种方法对您有效。
How to Prevent Windows 10 from Dimming the Screen Automatically
Doеs your Windows 10 screen automatically dim for no specifіc reason? Chances are you’ve enabled adaptive brightness on your PC, but there are other reasons why your screen automatically dims.
No matter what’s causing it, there are a few simple fixes you can apply to your PC to stop it from automatically dimming. One of these methods should resolve the issue.
Disable Adaptive Brightness
Windows 10 comes with a feature called adaptive brightness that automatically adjusts the brightness of your display. If this option is enabled, and the surrounding environment changes, Windows automatically dims your screen.
In this case, turn the adaptive brightness feature off and see if your issue gets resolved. You can turn this option back on anytime you want.
- Open Windows 10’s Settings app by pressing Windows + I keys at the same time.
- Select System on the Settings window.
- Select Display from the options on the left sidebar.
- On the right pane, deactivate the option that says Change brightness automatically when lighting changes.
From now on, Windows 10 won’t automatically increase or decrease your display’s brightness. If your screen gets too dark or too light, use the brightness slider on the Display settings menu to manually adjust the brightness levels.
Remove the Latest Windows 10 Update
Some users report that their screen started dimming right after installing a Windows update. In this case, you can remove the latest Windows 10 update you’ve installed. It might fix the issue.
- Open the Start menu, search for Control Panel, and select Control Panel in the search results.
- In Control Panel, click the View by menu at the top and select Category.
- Select Programs from the available options on your screen.
- On the following screen, under Programs and Features, select the View installed updates option.
- You’ll now see a list of installed updates on your computer. Select the Installed On column and ensure the most recent update appears first.
- Select the most recent update in the list, and then select Uninstall at the top.
- Select Yes in the prompt that appears to get rid of the selected update.
- Restart your computer when the update is removed.
If your screen doesn’t dim after removing the update, the update was the culprit.
You’ll find these latest Windows updates at the Settings > Update & Security > Windows Update path on your PC.
Check the Startup Programs List
If your Windows 10 screen dims a few seconds after booting the computer, a startup program might be the reason. Your system loads many programs at the boot, and it’s worth checking this programs list to find any suspicious items.
- Access the Start menu, search for Settings, and select Settings in the search results.
- Select Apps on the Settings window.
- On the left sidebar, select Startup.
- On the right, all of the programs with the toggle saying On are allowed to launch at the boot of your computer.
- Turn all or only suspicious programs off in this list. A suspicious program is basically the one that you recently installed before your screen issue started occurring.
- Restart your computer and see if the issue is gone.
Use Power Troubleshooter
Windows 10 includes many troubleshooters, one of which is a power troubleshooter. With this, you can find and resolve most power-related issues, including screen dimming issues, on your PC.
To run the troubleshooter:
- Open the Settings app on your computer.
- Select Update & Security on the main Settings screen.
- On the left sidebar, select Troubleshoot.
- Choose the Additional troubleshooters option on the right pane.
- Find Power in the troubleshooters list, select it, and then select Run the troubleshooter.
- Wait for the troubleshooter to detect and fix issues with your power settings.
Update the Graphics Card Drivers
A possible reason your Windows 10 PC’s screen automatically dims is that you’re using outdated graphics drivers. Graphics drivers allow your graphics card to interact with your system, and so you should always keep these drivers up to date.
If you haven’t updated these drivers in a long time, run a drivers update as follows.
- Open the Start menu, search for Device Manager, and select that option in the search results.
- Select Display adapters to expand its menu.
- Right-click your graphics card under Display adapters and select Update driver.
- In the window that opens, select the Search automatically for drivers option.
- Allow Windows 10 to find and install the latest graphics drivers on your computer.
- Reboot your computer when the drivers are installed.
Turn the Screen’s Power Saving Mode Off
If your video or graphics card comes from a reputed manufacturer, it’s likely a manufacturer tool is installed on your PC. This tool helps you set up various options for your card.
It’s possible that this tool has enabled the power saving mode for your graphics card. In this case, the mode automatically dims your screen after a certain time.
To fix this, simply turn off the power saving option in this utility. For the following example, we’ll use an Intel utility to disable the power saving mode.
- Access the Start menu, search for Intel Graphics Control Panel, and select that option in the results.
- Select Power on the main screen of the utility.
- Select On Battery from the left sidebar.
- On the right pane, under Display Power Saving Technology, select Disable.
- Select Apply at the bottom to save your changes.
Your Windows 10 PC’s screen should hopefully no longer dim automatically. And if this is the case, please let us know what method worked for you in the comments below.
