Explanatory information about standard ISO 9241-3
Explanatory information about 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 international standard ISO 9241-3 (Class I).
Examples:
A 24" 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 maximum of 2 lit and 2 unlit pixels plus 6 lit or 12 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 display. |
Subpixel | A subpixel is a separately addressable internal structure within a pixel that |
| enhances the pixel function. |
24 | A26361-K1334-Z220-1-7619, edition 1 |