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Notebook
Troubleshooting, First Aid and FAQ
Pixel errors on LCDs (notebook computers + monitors)
Active Matrix LCDs (TFT) with a resolution of 1280 x 800 pixels (XGA) rendered
by three sub-pixels each (red, green, blue), a total of almost 3,1 million control
transistors are used. Due to this high amount of transistors and the corresponding
complex manufacturing process, in some cases faulty or the wrong driving of
pixels and/or sub-pixels can occur. In the past there have been different attempts
to define the number of permitted pixel errors. Normally, these were very
complicated and completely different from manufacturer to manufacturer.
Therefore, for manufacturing and guarantee repairs, Targa follows the strict and
transparent definition of the ISO 13406-2, Class II standard that will be
summarized in the following. Among others, ISO Standard 13406-2 defines
universal specifications regarding pixel errors. The pixel errors are categorized
into four error classes and three error types. And each pixel is composed of three
sub-pixels with one primary color (red, green, blue) each.
5-10
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