Backlighting apparatus and method

G - Physics – 02 – F

Patent

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Details

G02F 1/01 (2006.01) G02F 1/133 (2006.01) G05D 25/02 (2006.01) G09F 13/04 (2006.01)

Patent

CA 2621362

The present invention provides a method and apparatus for generating light having a desired chromaticity, wherein two or more light-emitting elements which emit light having a dominant wavelength different from the dominant wavelength of a desired chromaticity can be used to generate light having the desired chromaticity. In particular, the dominant wavelength of one light- emitting element is selected to be greater than that of the dominant wavelength of the desired chromaticity and the dominant wavelength of a second light-emitting element is selected to be less than the dominant wavelength of the desired chromaticity. Two or more light-emitting elements configured in this manner can be employed to generate one of each of the three or more display primaries required for a specific lighting application, for example backlighting of a display panel.

Procédé et dispositif pour la production de lumière de chromaticité souhaitée : deux ou plus de deux éléments luminescents émettant une lumière de longueur d'onde dominante différente de la longueur d'onde dominante de chromaticité souhaitée peuvent être utilisés pour la production de lumière de chromaticité souhaitée. En particulier, on choisit la longueur d'onde dominante d'un élément luminescent à une valeur supérieure à celle de la longueur d'onde dominante de chromaticité souhaitée et celle d'un second élément luminescent à une valeur inférieure à celle de la longueur d'onde dominante de chromaticité souhaitée. On peut utiliser deux ou plus de deux éléments ayant cette configuration pour produire une des trois ou plus de trois couleurs primaires requises pour une application d'éclairage spécifique, par exemple le rétroéclairage d'un écran d'affichage.

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