Light guide device and backlight module using the same

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

2007-04-17

2007-04-17

Song, Sarah (Department: 2874)

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

C385S901000

Reexamination Certificate

active

11207104

ABSTRACT:
A light guide device (60) and a backlight module using the same. The light guide device includes: an incident surface (61); an emitting surface (64) adjacent to the incident surface; a reflecting surface (62) opposited to the emitting surface; a plurality of first V-shaped structures (644) formed on the emitting surface; and a plurality of second V-shaped structures (622) formed on the reflecting surface and perpendicular to the first V-shaped structures, wherein respective heigths of the second V-shaped structures increase with increasing distance from the incident surface and respective distances between adjacent second V-shaped structures decrease with increasing distance from the incident surface. The light guide device of the present invention does not need optical elements, and thus has a simple structure. A backlight module using the same light guide plate is also provided.

REFERENCES:
patent: 5779337 (1998-07-01), Saito et al.
patent: 5999685 (1999-12-01), Goto et al.
patent: 6129439 (2000-10-01), Hou et al.
patent: 6130730 (2000-10-01), Jannson et al.
patent: 6633722 (2003-10-01), Kohara et al.
patent: 2002/0145860 (2002-10-01), Lee
patent: 2005/0180720 (2005-08-01), Hara et al.

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