从你的电脑上关闭你的显示器肯定会加速你的工作流程。有可能吗？

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问题

超级用户读者Squ36想知道他是否可以让他的电脑告诉他的显示器该怎么做：

I was wondering if it was possible to power on/off a display using a computer connected via HDMI. Let me explain :

I want my computer to power off my monitors (not standby mode) when I don’t use it (no keyboard/mouse input) for more than 15 minutes, and power them back when such input is received. My monitors are connected over HDMI, so I was wondering if it was possible to use the CEC functionality with a computer. If is it possible, then is there a hardware requirement ?

My point is that I often take a break from my computer, but forget to turn off the screens, and I would prefer to shut down the screens completely instead of putting them to standby mode.

他怎么能这么做？

答案

SuperUser contributor Synetech提供了一些见解和解决方案：

I want my computer to power off my monitors (not standby mode) when I don’t use it (no keyboard/mouse input) for more than 15 minutes, and power them back when such input is received.

What you want is exactly what you are trying to avoid.

If the monitor is actually, fully off, then it can’t turn back on from a signal on the video cable. To allow it to turn on like that, there needs to be some sort of circuit in the monitor that remains on and active to watch for the signal. Monitors already have such a circuit, but turning them off turns that circuit off as well.

To use that circuit, you need to leave some electricity in the monitor, and that is exactly what standby does: it turns the display (and speakers, and everything else) off while leaving that one **all circuit active.

With most modern monitors, there is essentially no difference between standby mode and fully off other than a tiny low-voltage trickle in that circuit and the LED on the front.

I have to pay for electricity, so we always avoid using electricity as much as is humanly possible, yet, I leave it in standby when I am using the computer and need to step away for a while (I turn both off when I am done for the day).

Instead of letting the monitor remain on for 15 minutes for nothing, your best best is to do what I do and simply get into the habit of either turning the monitor off whenever you get up to step away, or to manually put it into standby mode. What I do is to use the AutoHotkey script below (can be compiled to an executable that runs in the background if desired) to let me press ⊞ Win+M to sleep the monitor whenever I get up. Other opti*** include using a shortcut or program, using a script or program to do it with a mouse-cursor hot-corner, or even just reducing the timeout from 15 minutes to five or so.

我们强烈推荐的一种解决方案是将显示器连接到专用的电源板上，以便一下子切断所有显示器的电源。虽然这个解决方案在原则上看起来是实用和有效的，但我们发现在应用中完全切断显示器的电源（而不是使用电源按钮）经常会导致显示器设置被删除。无论我们用电源板上的一个开关节省了多少时间，我们都在重新配置显示器时损失了时间。

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