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Pixelfejl i LCD-skærme
Til trods for den mest moderne produktionsmetode kan der i
sjældne tilfælde opstå udfald af enkelte eller flere lyspunkter på
grund af den meget komplekse teknologi.
opløsning på 1920 x 1080 Ved Aktiv Matrix TFT'er med en
Pixels, som er sammensat af tre sub-pixels (rød, grøn, blå),
anvendes i alt ca. 6,2 mil. styretransistorer. På grund af
dette meget høje antal transistorer og den dermed
forbundne yderst komplicerede produktionsproces kan der nu og
da opstå udfald eller forkert styring af pixels hhv. sub-pixels.
Pixelfejlklasse Fejltype 1
konstant
lysende pixel
Fejltype 2
konstant
sort pixel
Fejltype 3
defekt subpixel
lysende sort
0 0 0 0 0
I 1 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
Det tilladte antal fejl af ovennævnte typer i hver fejlklasse skal ses i forhold til en million pixel og skal
omregnes svarende til displayets fysiske opløsning.
143


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