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23. European EN 9241-307 Class II Standard
For active matrix LCDs (TFT) with a resolution of 1366 x 768 pixels, each of which
consist of three sub-pixels (red, green, blue), there are a total of approx. 3.1 million
control transistors in use. Due to this very high number of transistors and the
associated extremely complex manufacturing processes used, occasionally one or
more pixels can fail or become incorrectly controlled.
In the past, there were a number of approaches for defining the permitted number
of pixel defects. However, these approaches were mostly very complicated and
varied from one manufacturer to the next. When handling warranty issues for all
of its display products, MEDION therefore adheres to the strict and transparent
requirements of the standard ISO 9241-307, Class II; which has been briefly
summarised below.
The EN 9241-307 standard defines, amongst other things, the generally applicable
guidelines relating to pixel defects. Pixel defects are categorised into four fault
classes and three defect types. Every individual pixel consists of three sub-pixels,
each of which is assigned a basic colour (red, green, blue).
Pixel structure
5 Pixel
Rows
Sub-Pixel
Pixel
blue
green
red
5 Pixel
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