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13.2. Pixelfehler bei Smart-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 3.840 x 2.160 Pixel,
welche sich aus je drei Sub-Pixel
(Rot, Grün, Blau) zusammensetzen,
kommen insgesamt ca. 24,9 Mio.
Ansteuerelemente zum Einsatz.
Aufgrund dieser sehr hohen Anzahl
von Transistoren und des damit ver-
bundenen äußerst komplexen Fer-
tigungsprozesses 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
77


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