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DE
Pixelfehler bei LCD-TVs
Trotz modernster Fertigung kann es auf Grund der hochkomple-
xen Technik in seltenen Fällen zu Ausfällen von einzelnen oder
mehreren Leuchtpunkten kommen.
Bei Aktiv Matrix TFTs mit einer Auflösung von 1366 x 768 Pixel,
welche sich aus je drei Sub-Pixel (Rot, Grün, Blau) zusammenset-
zen, kommen insgesamt ca. 3,1 Mio. Ansteuerelemente zum
Einsatz. Aufgrund dieser sehr hohen Anzahl von Transistoren und
des damit verbundenen äußerst komplexen Fertigungsprozesses
kann es vereinzelt zu einem Ausfall oder zur fälschlichen Ansteu-
erung von Pixel bzw. einzelnen Sub-Pixel kommen.
Pixelfehlerklasse Fehlertyp 1
ständig leuchten-
der Pixel
Fehlertyp 2
ständig schwarzer
Pixel
Fehlertyp 3
defekter Subpixel
leuchtend schwarz
00000
I112
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 Pi-
xel und muss entsprechend der physikalischen Auflösung der Displays umgerechnet werden.
5 Pixel
Zeilen
Sub-Pixel
Pixel
blau
grün
rot
5 Pixel
46


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