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16.1. Do You Need More Help?
If the suggestions in the previous section did not rectify your problem please contact us. The following information
would help us:
•
What is the MD Number?
•
What external devices are connected?
•
What messages appear on the screen?
•
When operating the device, at which step did the problem occur?
•
If you have a PC connected to the device:
− How is your computer configured?
− What software were you using when the problem occurred?
•
What steps have you already taken to try and rectify the problem?
•
Please provide your customer number if you have one.
17. LED-Backlight TV pixel faults
Despite the most modern production methods, the highly complex technology in-
volved in producing this type of device means there may be individual or multiple
pixel drop-outs (dead pixels). This is rare, however.
For active matrix TFTs with a resolution of 1920 x 1080 pixels, which are each made
up of three sub-pixels (red, green, blue), there are a total of approx. 6.2 Mio. control
elements in use. Occasionally one or more pixels can fail or become incorrectly con-
trolled because of this very high number of transistors and the associated extremely
complex manufacturing processes used.
Pixel fault class
0
I
II
III
IV
n*=1.5
The permitted number of faults of the above-mentioned types in every fault class is based on a number of one million
pixels and must be recalculated in accordance with the actual physical resolution of the display.
Your device complies with the European ISO 9241-307 Class II standard (class of pixel defect).
Defect type 1
Defect type 2
continuously
continuously
lit pixel
black pixel
0
1
2
5
50
Sub-Pixel
Defect type 3
Defect sub-pixel
lit
0
0
1
2
1
0
2
5
5-n*
0
15
50
50-n*
0
150
500
500-n*
0
5 Pixel
Rows
Pixel
blue
green
red
black
0
1
3
5
0
2xn*
10
0
2xn*
100
0
2xn*
1000
47
EN
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