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Medion MD 99070 - LIFE E6232 Manual

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25. Norme européenne EN 9241-307
classe II
Les écrans LCD à matrice active (TFT) d'une résolution de 1366 x 768 pixels, com-
posés respectivement de trois sous-pixels (rouge, vert et bleu), font appel à un total
d'environ 3,1 millions de transistors. Compte tenu de ce très grand nombre de tran-
sistors et des processus de fabrication extrêmement complexes qui y sont associés,
il peut se produire par endroits des pertes ou un mauvais adressage de pixels ou de
sous-pixels individuels.
Par le passé, il existait de nombreuses méthodes permettant de définir le nombre
d'erreurs de pixels tolérées. Mais elles étaient généralement très compliquées et
variaient fortement d'un fabricant à l'autre. C'est la raison pour laquelle MEDION,
en matière de garantie, se conforme aux exigences strictes et transparentes de la
norme EN 9241-307, classe II, pour tous les écrans TFT. Ces exigences se résument
comme suit :
La norme EN 9241-307 propose entre autres une définition des caractéristiques re-
latives aux erreurs de pixels. Les erreurs de pixels sont répertoriées en quatre classes
et trois types d'erreurs. Chaque pixel se décompose à son tour en trois sous-pixels
correspondant aux couleurs de base (rouge, vert, bleu).
Composition des pixels
5 Pixels
Lignes
Sous-pixels
Pixels
bleu
vert
rouge
5 Pixels
MD 99070_E6232 Aldi BE FR Win 8 RC1 Content.indd 74MD 99070_E6232 Aldi BE FR Win 8 RC1 Content.indd 74 10.09.2012 09:45:3110.09.2012 09:45:31
… 75 …


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