Solid-state, color-balanced backlight with wide illumination...

G - Physics – 09 – G

Patent

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Details

G09G 3/10 (2006.01) G09G 3/32 (2006.01) G09G 3/36 (2006.01) H05B 41/36 (2006.01)

Patent

CA 2637596

A color balanced solid-state backlight (15) provides feedback control of each color using a single photo detector (42) by imposing a modulation pattern (94, 96, 98) on the solid-state lamps revealing individual colors to the photodetector. The photo detector signal provides feedback controlling color balance over a small range of instantaneous brightness less than larger range of average brightness of the display to provide for accurate color balance throughout a large range of average brightnesses.

L'invention concerne un rétroéclairage (15) à semiconducteur à couleurs équilibrées fournissant une commande de rétroaction à chaque couleur au moyen d'un photodétecteur (42) unique par application d'un motif de modulation (94, 96, 98) sur les lampes à semiconducteur, ce qui affiche des couleurs individuelles sur le photodétecteur. Le signal de photodétecteur fournit une rétroaction commandant l'équilibrage des couleurs sur une petite portée de luminosité instantanée moins grande que la portée de luminosité moyenne de l'affichage afin de fournir un équilibrage de couleurs précis d'un bout à l'autre d'une grande portée de luminosité moyenne.

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