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D\u00e9finition : le nombre de pixels<\/span><\/h2>\n

Quel est le point commun entre HD, Full HD, QHD et 4K ? Bonne question, on vous remercie de la poser. Tous ces termes parlent d\u2019une seule et m\u00eame chose : la d\u00e9finition d\u2019\u00e9cran. La d\u00e9finition est le nombre de pixels pr\u00e9sents dans une dalle.<\/strong> Pour conna\u00eetre la d\u00e9finition d\u2019un \u00e9cran, on multiplie le nombre de pixels dispos\u00e9s sur une largeur par le nombre de pixels plac\u00e9s sur la hauteur. Gr\u00e2ce \u00e0 ce calcul savant, on obtient la d\u00e9finition de l\u2019\u00e9cran.<\/p>\n

\"definition<\/p>\n

Par exemple, une dalle QHD au format 16:9 est constitu\u00e9e de 2560 pixels en largeur et de 1440 pixels en hauteur soit au total 3 686 400 pixels. Une dalle 4K, elle, affiche 8 294 400 pixels (3840 x 2160 pixels).<\/p>\n

Les constructeurs ont r\u00e9cemment communiqu\u00e9 sur des d\u00e9finitions Full HD+ ou QHD+. Ce petit “+” est apparu alors que les smartphones int\u00e9graient petit \u00e0 petit de nouveaux formats d\u2019\u00e9cran<\/strong> (18:9, 19,5:9, 20:9, 16:10). Pour ces cas particuliers, le nombre de pixels pr\u00e9sents sur la largeur et la hauteur changent.<\/p>\n

Ainsi, un \u00e9cran QHD+ au format 18:9 est constitu\u00e9 de 2880 pixels en largeur et 1440 pixels en hauteur. Si vous \u00eates perdus retenez qu\u2019une d\u00e9finition QHD dispose de 1,6 fois plus de pixels qu\u2019une d\u00e9finition Full HD<\/strong>, la 4K\/UHD quatre fois plus. Pour y voir plus clair, on vous a concoct\u00e9 un petit tableau r\u00e9capitulatif.<\/p>\n

\"tableau<\/p>\n