Backlight with structured sufaces

Details Backlight with structured sufaces Backlight with structured sufaces

G - Physics

02

B

G02B 6/10 (2006.01) F21V 8/00 (2006.01) G02B 27/00 (2006.01) G02F 1/13357 (2006.01)

Patent

CA 2413700

A backlight includes a lightguide (16), a light source (12) disposed with respect to the lightguide (16) to introduce light into the lightguide (16) and a turning film. Optical structures (40) are formed in one of an output surface (18) and a back surface (20) of the lightguide (16). The optical structures (40) are arranged to extract light from the lightguide (16). A back reflector (24) is disposed adjacent the back surface (20). The optical structures (40) are formed to include a varying pattern arranged to mask non-uniformities in the output of the lightguide (16).

L'invention concerne un rétroéclairage comportant un guide de lumière, une source lumineuse placée par rapport au guide de lumière de façon à y introduire la lumière et un film tournant. Des structures optiques sont formées dans l'une des surfaces de sortie et une surface dorsale du guide de lumière. Les structures optiques sont disposées de façon à extraire la lumière du guide de lumière. Un réflecteur de fond jouxte la surface arrière. Les structures optiques sont formées de façon à comprendre un motif variable conçu pour masquer des non-uniformités dans la sortie du guide de lumière.

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