有一个单一的黑色像素瞪着你时，查看某些背景颜色可以有点沮丧和困惑，在同一时间。它是卡住了还是死了？今天的超级用户问答帖子回答了一位好奇的读者的问题。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

照片由丹尼尔·莫格福德（Flickr）提供。

问题

超级用户读者Mirkan想知道只有在查看蓝色背景时才能看到的黑色像素是卡住了还是死了：

I have a pixel on my LCD monitor that appears black only when viewing a blue background, otherwise, it works fine with regard to all other colors.

Is this pixel stuck or dead?

这是一个卡住的像素还是一个死像素？

答案

超级用户贡献者Tetsujin为我们提供了答案：

Dead. Stuck is ON, dead is OFF. Pixels are created from sub-pixels of primary colors, typically red, green, and blue:

The reason the dead spot is visible only when blue is displayed is because it is a blue sub-pixel that is dead. When the background is blue, that is the only color on and it stands out. When the background is another color, the other sub-pixels reproduce it or it is still bright and absent blue, which is less noticeable.

For example, you can see yellow because it is created from red plus green. A white pixel with a dead blue sub-pixel will produce yellow, which is not very noticeable in a bright spot that **all.

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