Light guide device and a backlight module using the same

Details Light guide device and a backlight module using the same Light guide device and a backlight module using the same

2008-05-20

2008-05-20

Sawhney, Hargobind S. (Department: 2885)

Illumination

Edge lighted panel

Light guide

C362S608000, C349S065000

Reexamination Certificate

active

07374329

ABSTRACT:
A light guide device includes a main body having a first incident surface, a second incident surface, an emitting surface, a reflecting surface and a plurality of first microstructures. The first incident surface is opposite to the second incident surface. The emitting surface extends from the first incident surface to the second incident surface. The reflecting surface is opposite to the emitting surface, and the plurality of first microstructures are formed on the reflecting surface and extend parallel to the first and second incident surface. A distribution density and relative size of the first microstructures progressively decrease along directions from a center of the reflecting surface toward the first and second incident surface, respectively. The present light guide device does not employ additional optical correcting elements and thus has a simple structure. A backlight module using the same light guide device is also provided.

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