IEC 61747-4-ed.2.0

Annotation of standard text IEC 61747-4-ed.2.0 :

IEC 61747-4:2012 describes the essential ratings and characteristics of LCD cells and passive matrix monochrome liquid crystal display modules. It does not apply to active matrix LCD cells nor to multicolour cells. This edition includes the following significant technical changes with respect to the previous edition: - 2.1 and 3.1 of IEC 61747-4:1998 were deleted because these items are defined in IEC 61747-1; - 2.7.6, in 2.7, Supplementary information, of IEC 61747-4:1998 was deleted because the scope of this standard is about passive matrix monochrome liquid crystal display modules; - The item "Gray scale: digital or analog" in 2.3.1 of IEC 61747-4:1998 was changed to "Gray scale: number" because it is more accurate; - Contrast mode: light symbol on dark background ("LOD" or "positive image") or dark symbol on light background ("DOL" or "negative image") was introduced in this part of IEC 61747 to replace the description in 2.3.1 and 3.3.1 of IEC 61747-4:1998. This publication is to be read in conjunction with IEC 61747-1:1998. La CEI 61747-4:2012 decrit les valeurs limite et caracteristiques essentielles des cellules et modules daffichage a cristaux liquides monochromes a matrice passive. Elle ne sapplique pas aux modules et cellules a matrice active ou polychrome. Cette edition inclut les modifications techniques majeures suivantes par rapport a ledition precedente: - 2.1 et 3.1 de la CEI 61747-4:1998 ont ete supprimes car ils sont repris par la CEI 61747-1; - 2.7.6 dans 2.7, Informations complementaires, de la CEI 61747-4:1998 a ete supprime car le domaine dapplication de la presente norme traite de modules daffichage a cristaux liquides monochromes a matrice passive; - "Echelle de gris: numerique ou analogique" dans 2.3.1 de la CEI 61747-4:1998 est change en "Echelle de gris: numero" car plus precis; - Mode de contraste: symbole clair sur fond sombre ("LOD, light on dark" ou "image positive") ou symbole sombre sur fond clair ("DOL, dark on light" ou "image negative") a ete introduit dans la presente partie de la CEI 61747 pour remplacer la description indiquee au 2.31 et au 3.3.1 de la CEI 61747-4:1998. Cette publication doit etre lue conjointement avec la CEI 61747-1:1998.