Explanatory information about stan
dard ISO 9241-3
Explanatory information abou
t
standard ISO 9241-3
Lit or unlit pixels
Today’s production techniques cannot guarantee an absolutely fault-free screen display. A
few isolated pixels may be constantly lit or unlit. The maximum permitted number of faulty
pixels is stipulated in the internat ional stan dard ISO 9241-3 (Class I).
Examples:
A24"flat-screen monitor with a resolution of 1920 x 1200 has 1920 x 1200 = 2 ,304,000 pixels. Each
pixel consists of three subpixels (red, green and blue), so there are almost 6.9 million subpixels in
total. According to ISO 9241-3 ( Class I), a maxim um of 2 lit an d 2 unlit pixels plus 6 lit or 1 2 unlit
subpixels, or a corresponding combination, may be faulty (1 lit subpixels counts as 2 unlit subpixels).
Pixel
A pixel consists of 3 subpixels, normally red, green and blue. A pixel is
the smallest element that can be generated by complete functionality of
the displa y.
Subpixel
A subpixel is a separately addressable internal structu re within a pixel that
enhances the pixel function.
24 A26361-K1334-Z220-1-7619, edition 1
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