Light source for backlighting

G - Physics – 02 – F

Patent

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Details

G02F 1/1335 (2006.01) F21K 99/00 (2010.01) F21S 8/00 (2006.01) F21V 7/00 (2006.01) F21V 8/00 (2006.01) G02F 1/13357 (2006.01) G02F 1/1337 (2006.01)

Patent

CA 2173336

A light source for backlighting a display comprises a light-emitting device such as an incandescent bulb (12) or LED array disposed within a cavity having diffusely reflecting walls and an aperture. A diffuser (20) and brightness enhancing film (22) are situated at the opening of the aperture between the aperture and the display to be backlit. A color filter (24) may also be employed to whiten the light emerging from the light source.

Une source de lumière, permettant d'éclairer par l'arrière un dispositif d'affichage, comprend un dispositif émetteur de lumière tel qu'une lampe à incandescence (12) ou un agencement de diodes électroluminescentes dans une cavité munie de parois à réflexion diffuse et d'une ouverture. Un diffuseur (20) et un film d'intensification de luminosité (22) sont situés à l'extrémité de l'ouverture, entre cette dernière et le dispositif d'affichage à éclairer par l'arrière. Un filtre coloré (24) peut également être utilisé pour blanchir la lumière provenant de la source de lumière.

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