Optical sheet, backlight assembly and display device having...

Details Optical sheet, backlight assembly and display device having... Optical sheet, backlight assembly and display device having...

2007-03-21

2009-06-30

O'Shea, Sandra L (Department: 2875)

Illumination

Light modifier

Refractor

C362S620000, C362S622000, C362S606000, C359S599000

Reexamination Certificate

active

07553050

ABSTRACT:
An optical sheet includes a base film and a light-concentrating member. The light-concentrating member includes light-concentrating protrusions and is disposed on the base film. Each of the light-concentrating protrusions includes first to fourth surfaces. The first and second surfaces are extended from the upper surface along an exterior surface of a first and second cylinder in a clockwise and a counterclockwise direction, respectively. The first and second cylinders have first and second axes that are substantially parallel to each other. The third and fourth surfaces are extended from the upper surface along an exterior surface of a third cylinder in clockwise and counterclockwise directions, respectively. The third axis is substantially perpendicular to the first central axis.

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patent: 2004/0207918 (2004-10-01), Abe et al.
patent: 2006/0256582 (2006-11-01), Chuang

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