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What is Pixel & Dead Pixel?

In digital imaging, a pixel, pel or picture element is a physical point in a raster image, or the smallest addressable element in an all points addressable display device; so it is the smallest controllable element of a picture represented on the screen.

Each pixel is a sample of an original image; more samples typically provide more accurate representations of the original. The intensity of each pixel is variable. In color imaging systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black.

A defective pixel is a pixel on a liquid crystal display that is not functioning properly. The ISO standard ISO 13406-2 distinguishes between three different types of defective pixels, while hardware companies tend to have further distinguishing types.


How to Dead Pixel Test?

You can reach the test page by clicking the Click for Pixel Test button below. You can start the test by reading the instructions on the test page.

No "dead pixel test" can automatically show you the dead pixel dot, so you should do this test carefully by looking at the screen.


Click for Pixel Test

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