User Reference Manual - DuraMON
PN: 04173-000 Rev C Page 48
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Appendix A: Pixel policy
ISO 13406-2 guidelines for LCD pixel defects
Introduction
TFT displays consist of a set number of pixels. Each pixel consists of 3 sub-pixels (one red, one blue
and one green). Every sub-pixel is addressed by its own transistor. As a result, the manufacturing of
glass substrate is very complex.
Due to the nature of this manufacturing process, occasional defects can occur. Pixel defects or
failures cannot be fixed or repaired and may occur at any stage during the service life of the TFT
display.
To regulate the acceptability of defects and protect the end user, ISIC A/S complies with the ISO
13406-2 standard. This standard recommends how many defects are considered acceptable in a
display, before it should be replaced, within the terms of the warranty.
Monitor classification
ISIC TFT monitors comply with ISO 13406-2 Class II.
Special agreements about other classifications can be made between ISIC A/S and the customer.
ISO 13406-2
Allowed pixel defects per type per million pixels
Pixel defect
Type 1
Type 2
Type 3
Class: I
0
0
0
Class: II
2
2
5
Allowed cluster defects per million pixels
Cluster defect
Type 1
Type 2
Type 3
Class: I
0
0
0
Class: II
0
0
2
Measurement method/monitoring conditions for pixel defects
In compliance with the ISO 13406-2 standard, the following conditions are observed:
Final check for pixel fault undertaken right after burn-in, i.e. with pre-heating of the display.
Surrounding temperature 25ºC ± 5ºC
Relative air humidity 40–70%
Dark room test.
Pixel definition
Every pixel consist of three sub-pixels (red, blue, green).
Every sub-pixel has its own transistor.
The three sub-pixels must be considered as one unit.
