与旧显示器相比，LCD显示器是一种出色的低成本、低功耗解决方案，可满足我们对计算机显示器(computer display)的需求。不幸的是，某些显示器设置会使LCD 屏幕(LCD screen)出现闪烁。
闪烁的液晶显示器(LCD monitor)不仅仅是一种烦恼。它会导致眼睛疲劳(eye strain)、头痛和许多其他疾病，尤其是当您长时间坐在电脑前时。幸运的是，您可以采取一些步骤来停止闪烁并避免这些问题。在本文中，我将向您展示如何阻止液晶显示器(LCD monitor)闪烁。
液晶显示器(LCD Monitor)闪烁(Flicker)的原因是什么
尽管您的计算机显示器(computer monitor)在无人使用时可能看起来是静止图像，但实际上它在不断更新。就像电影胶片(film strip)只是一堆快速显示的静态图像一样，您的显示器会快速更新，以使其看起来像是屏幕上的事物在平滑移动。
显示器更新的速率以赫兹(Hertz)为单位。一赫兹(Hertz)等于每秒一个周期。如果您的显示器设置为以 100赫兹(Hertz)的速率更新，则它每秒刷新 100 次。用于测量显示器刷新率的赫兹与用于测量(Hertz)CPU速度的千兆赫(Gigahertz)类似，只是千兆赫(Gigahertz)是以每秒数十亿个周期表示的度量。
如果液晶显示器(LCD monitor)的刷新率设置得太低，它可能会出现闪烁，因为每秒没有足够的更新。虽然有些人对大约 30赫兹(Hertz)感到满意，但其他人可以看到闪烁并需要更高的刷新率。最常见的刷新率是 60赫兹(Hertz)。
还有其他可能导致屏幕闪烁的因素，我已经在这篇文章的底部提到了这些因素。
设置LCD 显示器(LCD Monitor)的刷新率(Refresh Rate)
您可以为LCD 显示器(LCD monitor)设置的刷新率 很大程度上取决于显示器的功能。虽然一些LCD 显示器(LCD monitor)可以利用几种不同的刷新率，但其他的仅限于一种或两种。
要在Windows中为您的LCD 显示器(LCD monitor)选择新的刷新率(refresh rate)，首先单击Start > Control Panel > Appearance and Personalization > Display。如果您使用的是Windows 8或 10，只需右键单击“开始”按钮(Start button)并选择“控制面板(Control Panel)” 。如果您处于图标视图中，则可以直接单击Display。
在窗口的(hand side)左侧，单击更改显示设置(Change Display Settings)。
最后，单击窗口右下角的高级设置。(Advanced Settings)
单击“监视器(Monitor)”选项卡，您会注意到一些事情。首先(First)，注意标有屏幕刷新率( Screen Refresh Rate)的设置。这是您的LCD 显示器(LCD monitor)的当前刷新率(refresh rate)。单击(Click)下拉菜单，Windows(menu and Windows)将显示显示器的所有可能刷新率(refresh rate)。
很可能你的显示器只能使用一两个刷新率(refresh rate)，所以这个列表可能不会很长。一些制造商制造的显示器可以显示从 30赫兹(Hertz)到 200赫兹(Hertz)的任何频率。通常(Normally)，刷新率较高(refresh rate)的显示器会更贵。游戏显示器的常见刷新率(refresh rate)为 144赫兹(Hertz)。如果您觉得显示器的价格太便宜，那可能是因为它的刷新率低(refresh rate)。例如，一些新的 4K 显示器价格便宜，但只有 30赫兹(Hertz)，这会使屏幕上的所有内容看起来都不稳定。(everything look)
此外，很多显示器会显示 59Hz 和 60Hz，您可以在两者之间进行选择。那么有什么区别呢？这基本上与舍入有关，这并不重要。您可以在此处阅读59Hz 与 60Hz(59Hz vs 60Hz)的详细信息。
从这里，您可以尝试更高的刷新率(refresh rate)并查看闪烁是否停止。通常这可以解决问题。如果它不起作用或只列出了一种刷新率(refresh rate)，您可以尝试两种方法。
首先，确保您使用的是最新的液晶显示器(LCD monitor)驱动程序。如果驱动程序已过时或Windows使用的是通用驱动程序，则可用的刷新率数量可能会受到限制。访问制造商网站(manufacturer website)并下载适用于您的Windows版本的最新驱动程序。
如果这不起作用(t work)，您可以强制Windows使用显示器技术上不支持的刷新率。不过要小心，因为这样做可能会损坏显示器硬件(monitor hardware)。
在上面显示的Monitor选项卡上，有一个默认选中的选项，称为 Hide Modes That This Monitor Cannot Display。通过取消选中此选项，您可以强制Windows为您的显示器使用所需的任何刷新率。
请注意(Notice)，在此选项下方，Windows会警告您有关不可用或损坏的显示器。取消选中此选项并将您的显示器设置为不受支持的刷新率(refresh rate)，风险自负。根据您的Windows版本，此选项可能会显示为灰色，这意味着您只能从框中列出的刷新率中进行选择。(refresh rate)
对于运行OS X的(OS X)Mac用户，您可以转到系统偏好设置(System Preferences)并单击显示(Display)。您可以在此处更改连接到Mac的外接显示器的刷新率(refresh rate)。
其他屏幕闪烁原因
如果更改刷新率不能解决屏幕闪烁问题，则可能与其他因素有关。以下是您应该检查的其他项目的列表：
电缆(Cable)- 如果可以，请更换将显示器连接到计算机的电缆。在某些情况下，有缺陷的电缆会导致信号在通过电线传输时中断。
输入端口(Input Port)– 如果可能，另一种解决方案是在显示器上使用不同的端口。例如，如果您使用HDMI连接，请尝试使用DVI 或 DisplayPort(DVI or DisplayPort)或VGA，看看是否能解决问题。
环境(Surroundings)——除了硬件问题，电磁场也会导致屏幕闪烁问题。如果您在同一电源(power strip)板上插入了其他东西，例如加热器、风扇等，请尝试将其移除。
显卡- 如果您的(Video card)显卡(video card)有问题，显然会影响屏幕上的输出。更新驱动程序并打开计算机以确保视频卡(video card)正确插入插槽。
显示器(Monitor)——最后，显示器本身可能损坏或有缺陷。尝试将显示器连接到另一台计算机以查看问题是否消失或仍然存在。
希望这将帮助您找出导致显示器闪烁问题的原因。如果您有任何问题，请随时发表评论。享受！
How to Stop an LCD Monitor from Flickering
Cоmpared to older displays, LCD mоnitors are an excellеnt low-cost, low-power solution to our need for a comрuter display. Unfortunаtely, some monitor settings can make an LCD screen appear to flicker.
A flickering LCD monitor is more than just an annoyance. It can cause eye strain, headaches, and a host of other ailments, especially if you spend a great deal of time in front of your computer. Luckily, there are some steps you can take to stop the flickering and avoid these problems. In this article, I’ll show you how to stop your LCD monitor from flickering.
What Causes an LCD Monitor to Flicker
Although your computer monitor may appear to be a still image when no one is using it, it is actually being updated constantly. Much like a film strip is just a bunch of static images displayed quickly, your monitor updates at a fast rate to make it look like things are moving smoothly on the screen.
The rate at which your monitor updates is measured in Hertz. One Hertz is equal to one cycle per second. If your monitor is set to update at a rate of 100 Hertz, then it is refreshing 100 times per second. The Hertz used to measure monitor refresh rates is similar to the Gigahertz used to measure the speed of your CPU, except that Gigahertz is a measure expressed in billions of cycles per second.
If the refresh rate on your LCD monitor is set too low, it can appear to be flickering since there aren’t enough updates per second. While some people are comfortable with around 30 Hertz, others can see the flickering and require a higher refresh rate. The most common refresh rate is 60 Hertz.
There are other factors that can cause screen flickering and I have mentioned those at the bottom of this post.
Setting the Refresh Rate for an LCD Monitor
The refresh rates that you can set for your LCD monitor are largely determined by the capabilities of your monitor. While some LCD monitors can take advantage of several different refresh rates, others are confined to just one or two.
To choose a new refresh rate for your LCD monitor in Windows, begin by clicking on Start > Control Panel > Appearance and Personalization > Display. If you are on Windows 8 or 10, just right-click on the Start button and choose Control Panel. If you’re in icon view, you can click directly on Display.
On the left hand side of the window, click on Change Display Settings.
Finally, click on Advanced Settings at the bottom right of the window.
Click on the Monitor tab and you will notice a few things. First, notice the setting labeled Screen Refresh Rate. This is the current refresh rate for your LCD monitor. Click the drop down menu and Windows will display all of the refresh rates possible for your monitor.
It is likely that your monitor can only use one or two refresh rates, so this list may not be long. Some manufacturers build monitors that can display anywhere from 30 Hertz to 200 Hertz. Normally, monitors with higher refresh rates will be more expensive. A common refresh rate for gaming monitors is 144 Hertz. If the price of a monitor seems too cheap to you, it’s probably because it has a low refresh rate. For example, some new 4K monitors are cheap, but are only 30 Hertz, which can make everything look choppy on the screen.
Also, a lot of monitors will show 59Hz and 60Hz and you can pick between the two. So what’s the difference? It’s basically something to do with rounding and it really doesn’t matter. You can read the exact details on 59Hz vs 60Hz here.
From here, you can try a higher refresh rate and see if the flickering stops. Usually this does the trick. If it doesn’t work or there is only one refresh rate listed, there are two things you can try.
First, make sure you are using the latest driver for your LCD monitor. If the driver is outdated or Windows is using a generic driver, the number of refresh rates available may be limited. Visit the manufacturer website and download the latest driver for your version of Windows.
If that doesn’t work, you can force Windows to use a refresh rate that is not technically supported by the monitor. Be careful, though, because it is possible to damage your monitor hardware if you do this.
On the Monitor tab shown above, there is an option that is checked by default called Hide Modes That This Monitor Cannot Display. By unchecking this option, you can force Windows to use any refresh rate for your monitor that you want.
Notice that right underneath this option, Windows warns you about an unusable or damaged display. Uncheck this option and set your monitor to an unsupported refresh rate at your own risk. Depending on your version of Windows, this option may be grayed out, meaning you can only pick from the refresh rates listed in the box.
For Mac users running OS X, you can go to System Preferences and click on Display. Here you can change the refresh rate for an external display connected to your Mac.
Other Screen Flickering Causes
If changing the refresh rate doesn’t fix the flicker on the screen, it could be related to other factors. Here is a list of other items you should check:
Cable – If you can, change the cable connecting your monitor to your computer. In some cases, a defective cable can cause the signal to break while being transmitted across the wire.
Input Port – Another solution is to use a different port on the monitor, if possible. For example, if you are connecting using HDMI, try DVI or DisplayPort or VGA instead and see if that fixes the problem.
Surroundings – In addition to hardware issues, electromagnetic fields can also cause screen flickering problems. If you have something else plugged into the same power strip like a heater, fan, etc., try removing it.
Video card – If there is an issue with your video card, it will obviously effect the output on the screen. Update the drivers and open your computer to ensure that the video card is properly seated in the slot.
Monitor – Lastly, the monitor itself could be damaged or defective. Try connecting the monitor to another computer to see if the problem goes away or remains.
Hopefully, this will help you figure out what’s causing the flickering issues with your monitor. If you have any questions, feel free to comment. Enjoy!
