Information On Display Errors; European En Iso 9241-307 Class Ii Standard - Medion E14301 User Manual

Information on Display Errors

Information on Display Errors

European EN ISO 9241-307 Class II Standard

Due to the 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 defi ning 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 EN ISO 9241-307, Class II; which has been briefl y
summarised below.
The EN ISO 9241-307 standard defi nes, 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
Pixel defect types:
• Type 1:
permanently illuminated pixel (bright, white dot) even when not activated. A
white pixel occurs due to the illumination of all three sub-pixels.
• Type 2:
non-illuminated pixel (dark, black dot) even when activated.
• Type 3:
abnormal or faulty red, green or blue sub-pixel (e.g. permanently illuminated at
half brightness, one colour not illuminated, fl ashing or fl ickering but not type 1
or 2)
46
5 Pixel
Sub-Pixel red
Rows
Pixel
blue
green