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FR
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Errori di pixel sui TV LCD
Nonostante vengano utilizzati i più re-
centi metodi di produzione, a causa
dell'elevata complessità delle tecnologie,
in alcuni rari casi può verificarsi un mal-
funzionamento di uno o più pixel.
Per un TFT a matrice attiva, con una ri-
soluzione di 1366 x 768 pixel, dei quali
ognuno è formato da tre sottopixel (ros-
so, verde, blu), si utilizza un totale di 3,1
milioni di elementi di controllo. A causa
di questo elevato numero di transistor e
del processo produttivo estremamente complesso, talvolta può ca-
pitare che qualche pixel o sottopixel non si attivi o funzioni scorret-
tamente.
Classe di
errore dei
pixel
Tipo di er-
rore 1 pixel
sempre lumi-
noso
Tipo di er-
rore 2
pixel sem-
pre nero
Tipodierrore
3 sottopixel
difettoso
lumi-
noso
nero
00 0 00
I1 12
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
5 Pixel
Linee
Sub-pixel
Pixel
blu
verde
rosso
5 Pixel
196


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