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Important notes
Explanatory information about standard ISO 9241-307
Permanently unlit or lit pixels
Today’s production techniques cannot guarantee an absolutely fault-free screen display. D epending
on the total number of pixels (resolution), there may be a few constantly lit or unlit pixels or subpixels.
Pixel
A pixel consists of 3 s ubpixe
ls, normally red, green and blue. A pixel is
the smallest element that
can be gene rated by complete functionality of
the display.
Subpixel
A subpixel is a separatel
y addressable internal structure within a pixel that
enhances the p ixel func
tion.
The maximum permitted number of fa ulty pixels is stipulated in the international standard ISO
9241-307. In accordance with standard ISO 9241-3, LCD displays by Fujitsu comply with C lass II
for low resolutions and Class I for resolutions of 1680 x 1050 (1764000 pixel) and higher.
Examples:
A at-screen monitor with a resolution of 1280 x 1024 has 1280 x 1024 = 1310720 pixels. E ach pixel
consists of three subpixels (red, green and blue), so there a re almost 3.9 million subpixels in total.
According to ISO 9241-3 (Class II), a maximum of 3 lit and 3 unlit pixels plus 7 lit o r 13 unlit subpixels,
or a corresponding combination, may be faulty (1 lit subpixel counts as two unlit subpixels).
A at-screen monitor with a resolution of 1920 x 1080 has 1920 x 1080 = 2073600 pixels. E ach pixel
consists of three subpixels (red, green and blue), so there a re almost 6.2 million subpixels in total.
According to ISO 9241-3 (Class I), a maximum o f 2 lit and 2 unlit pixels plus 5 lit or 10 unlit subpixels,
or a corresponding combination, may be faulty (1 lit subpixel counts as two unlit subpixels).
Fujitsu 15
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