Backlight module and light guide plate thereof

Details Backlight module and light guide plate thereof Backlight module and light guide plate thereof

2006-03-28

2006-03-28

Tso, Laura K. (Department: 2875)

Illumination

Revolving

Reexamination Certificate

active

07018061

ABSTRACT:
A backlight module (3) includes a light source (31), a light cover (32), and a light guide plate (33). The light guide plate includes an incident surface (333), an emitting surface (331), and a bottom surface (335) opposite to the emitting surface for scattering and reflecting the light beams input by the light source. The light beams are directed by the bottom surface to the emitting surface. A plurality of stairway-shaped protrusions (332) are uniformly located on the emitting surface. The stairway-shaped protrusions can efficiently improve the modulation transfer function of the light guide plate, and increase the brightness of the backlight module.

REFERENCES:
patent: 5999685 (1999-12-01), Goto et al.
patent: 6139162 (2000-10-01), Masaki
patent: 6224223 (2001-05-01), Higuchi et al.
patent: 6264343 (2001-07-01), Miyashita et al.
patent: 6628352 (2003-09-01), Sumida et al.
patent: 6644823 (2003-11-01), Egawa et al.

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