Windows：如何更改显示器的背光亮度
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Windows: How to change monitor's backlight brightness
提问by GetFree
Ever since I've been using an external monitor with my laptop, when I need to change the backlight brightness I have to press the monitor's buttons to navigate through its menu and adjust the brightness.
That is really a pain. It's too many button presses! When I was using my laptop's integrated monitor, that was as simple as presing the Fnkey plus a combination.
自从我在笔记本电脑上使用外接显示器后，当我需要更改背光亮度时，我必须按下显示器的按钮来浏览菜单并调整亮度。
那真的很痛苦。按太多按钮了！当我使用我的笔记本电脑的集成显示器时，就像按一个Fn键加一个组合一样简单。
Probably some of you might think it is not possible to change that programmatically. I thought that too. But I've just found a control (a GUI control) in my video card configuration that does exactly that.
So, that proves it is possible to change this programmatically.
可能你们中的一些人可能认为不可能以编程方式改变它。我也是这么想的。但是我刚刚在我的视频卡配置中找到了一个控件（一个 GUI 控件），它正是这样做的。
因此，这证明可以通过编程方式更改此设置。
But I can't find any tool or utility that does that. All what I've found are tools that adjust gamma, brightness and contrast. But backlight brightness is a different thing.
但我找不到任何可以做到这一点的工具或实用程序。我发现的所有工具都是调整伽马、亮度和对比度的工具。但背光亮度是另一回事。
Does any of you know how to adjust that damn thing programmatically in Windows?
你们中有人知道如何在 Windows 中以编程方式调整那个该死的东西吗？
采纳答案by GetFree
Let's try that again. There is a SetMonitorBrightnessfunction, but it is only available starting with Vista. There is also IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESSwhich is available starting with XP SP1. I might give that a try on my laptop just out of curiosity.
让我们再试一次。有一个SetMonitorBrightness功能，但它只从 Vista 开始可用。还有IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESS，它从 XP SP1 开始可用。出于好奇，我可能会在我的笔记本电脑上尝试一下。
回答by Sean Reifschneider
I know this question is about Windows, but if anyone is looking for the Linux way to do this you can run the "xbacklight" program, for example: "xbacklight -set 100" to set to 100% (full) brightness. The source code to this program could be used to embed it into a program.
我知道这个问题是关于 Windows 的，但是如果有人正在寻找 Linux 方法来执行此操作，您可以运行“xbacklight”程序，例如：“xbacklight -set 100”以设置为 100%（全）亮度。该程序的源代码可用于将其嵌入到程序中。
回答by GetFree
There are a couple of tools that let you set the backlight brightness:
有几个工具可以让您设置背光亮度：
The latter uses a custom library which they offer commercially and supports most popular programming languages in Windows. http://www.nicomsoft.com/products/i2c/
后者使用他们在商业上提供的自定义库，并支持 Windows 中最流行的编程语言。http://www.nicomsoft.com/products/i2c/
回答by Factor Mystic
If you have an NVidia card with the control panel installed, you should have a brightness control on the Adjust desktop color settingsnode.
如果您有安装了控制面板的 NVidia 卡，您应该在Adjust desktop color settings节点上有一个亮度控制。
