Dead pixel?

Question

I just bought the 1907FP monitor a few days ago. I think I've found my first dead pixel, that dreaded nuisance that plagues LCD monitors everywhere. It doesn't look like a typical deal pixel; rather it looks like a fleck of dirt or dust. But I've gently wiped that area with a dry cloth, then a lightly dampened one, and it's still there. Speck is only noticable against a bright white background. If I turn off the monitor and look at that spot, I can't see anything unusual.

Dufflover · Answer

If it's not dirt or whatever then it's a faulty pixel. You can have faulty pixels too (but they're as loathed as dead pixels).

lawnmowerguy · Answer

What is the difference between a faulty and dead pixel?

Dufflover · Answer

Just something I Googled up for ya:

http://compreviews.about.com/od/multimedia/a/LCDPixelDefects.htm

dead pixel is defined as a pixel or set of sub-pixels that has failed and is permanently in the off position. This condition means that the pixel will not let any light through. This can be observed as a dark or black spot on a brightly colored or white background.

A stuck pixel is defined as a pixel or sub-pixel that has failed and is permanently in the on position. This can be either with a single or multiple sub-pixels for a given pixel and is best observed on a dark or black background. A white pixel means all three sub-pixels have failed while a green, red or blue pixel means one of the sub-pixels has failed.

gpro · Answer

The ISO 13406-2 standard defines three types of pixel defects:
Type 1 = permanently bright
Type 2 = permanently dark
Type 3 = faulty sub-pixel, resulting in a red, green or blue dot

To confuse things, some panels (TN) let light through when the pixels are off and others (IPS) let light through when they are on.
Faulty pixels can sometimes be revived. To check for dead/faulty pixels you can use Dead Pixel Buddy or Checkemon

Message Edited by gpro on 07-02-200609:40 AM

lawnmowerguy · Answer

Thanks for the replies. Is it accurate to say that most LCD monitors will have at least a couple of defective pixels?

gpro · Answer

It's difficult to say what percentage of screens sold have defective pixels. Manufacturing processes have improved since the early days, but screens have become larger, increasing the odds of a defective pixel.

LCD screens dead pixels - BeHardware
Dell Fixed/Stuck Pixel Policy

Monitors

Dead pixel?

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