Light guide plate and backlight module adopting the same

Details Light guide plate and backlight module adopting the same Light guide plate and backlight module adopting the same

2007-04-17

2007-04-17

Wood, Kevin S. (Department: 2874)

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

C385S147000, C385S129000, C359S599000, C359S707000, C359S837000

Reexamination Certificate

active

11299095

ABSTRACT:
A light guide plate (120) includes an incidence surfaces (121), an emission surface (123) adjoining the incidence surface, and a bottom surface (122) adjoining the incidence surface and being opposite to the emission surface. The light guide plate further includes a refractive-diffractive hybrid lens array (124) formed on the emission surface. The refractive-diffractive hybrid lens array has a plurality of refractive-diffractive hybrid lenses (125). The refractive-diffractive hybrid lenses can reduce or even avoid chromatic aberration along axes thereof. This can converge emitted light beams, thereby enhancing a brightness of the emitted light beams. Thus, the light guide plate can provide good display quality. Therefore, the light guide plate can be advantageously applied in backlight modules (210) of liquid crystal display devices.

REFERENCES:
patent: 6798574 (2004-09-01), Kim
patent: 2002/0048162 (2002-04-01), Ohkawa et al.

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