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143 * 210 mm
19.12.2011 10:46
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Errores de píxeles en los TVs LCD
A pesar de los métodos de fabricación modernos, debido a la alta complejidad
tecnológica en raros casos pueden fallar uno o varios puntos luminosos.
En caso de pantallas TFT de matriz activa con una
resolución de 1920 x 1080 píxeles, que están
compuestos por tres subpíxeles cada uno (rojo, verde,
azul), en total se emplean aprox. 6,2 millones de
elementos de excitación. Debido al enorme número
de transistores y del proceso de fabricación
especialmente complejo que éste conlleva, en pocos
casos se pueden producir fallos o una excitación
errónea de píxeles o de determinados subpíxeles.
Clase de error de
píxeles
Tipo de error 1
píxel siempre
iluminado
Tipo de error 2
píxel siempre
negro
Tipo de error 3
subpíxel erróneo
iluminad
o
negro
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
El número de errores permitido de los tipos arriba enumerados en cada clase de error
se refiere a millones de píxeles y deberá ser calculado según la resolución física de la
pantalla.
276


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