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10.2. Pixelfehler bei LCD-TVs
Trotz modernster Fertigung kann
es auf Grund der hochkomplexen
Technik in seltenen Fällen zu Aus-
fällen von einzelnen oder mehreren
Leuchtpunkten kommen.
Bei Aktiv Matrix TFTs mit einer Auf-
lösung von 1366 x 768 Pixel /
1920 x 1080 Pixel (P16108 (MD
31212)), welche sich aus je drei
Sub-Pixel (Rot, Grün, Blau) zusam-
mensetzen, kommen insgesamt ca.
3,1 Mio. / 6,2 Mio. (P16108 (MD
31212)) Ansteuerelemente zum
Einsatz. Aufgrund dieser sehr ho-
hen Anzahl von Transistoren und des damit verbundenen äußerst komplexen Ferti-
gungsprozesses kann es vereinzelt zu einem Ausfall oder zur fälschlichen Ansteue-
rung von Pixel bzw. einzelnen Sub-Pixel kommen.
Pixelfehler-
klasse
Fehlertyp 1
ständig leucht-
ender Pixel
Fehlertyp 2
ständig schwar-
zer Pixel
Fehlertyp 3
defekter Subpixel
leuchtend schwarz
00 0 00
I1 1 2
1
0
1
3
5
II 2 2 5
5-n*
0
0
2xn*
10
III 5 15 50
50-n*
0
0
2xn*
100
IV 50 150 500
500-n*
0
0
2xn*
1000
n*=1,5
Die erlaubte Anzahl von Fehlern der o. g. Typen in jeder Fehlerklasse bezieht sich
auf eine Million Pixel und muss entsprechend der physikalischen Auflösung der Dis-
plays umgerechnet werden.
Ihr Gerät entspricht der europäischen Norm ISO 9241-307 Klasse II (Pixelfehlerklas-
se).
5 Pixel
Zeilen
Sub-Pixel
Pixel
blau
grün
rot
5 Pixel
57


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