Backlight module

Details Backlight module Backlight module

2007-02-21

2010-06-22

Payne, Sharon E (Department: 2875)

Illumination

Edge lighted panel

Light guide

C362S097200, C362S555000, C362S561000

Reexamination Certificate

active

07740391

ABSTRACT:
A backlight module has a light guide plate and a plurality of light sources. The light guide plate includes a light exit surface, a plurality of light entrance surfaces round the light exit surface, and a plurality of light guide portions disposed on the bottom surface opposite to the light exit surface. The light guide portions corresponding to the same imaginary circle center constitute a concentric arc-shaped light guide portion set. The imaginary circle center of each light guide portion set is located at the outer side of the light entrance surfaces. Light rays projected to one of the light entrance surfaces from the imaginary circle center of each light guide portion set are guided to a light exit surface by the light guide portion set. The wavelength of the light ray projected by each light source is not equal to that of the light projected by another light source.

REFERENCES:
patent: 5718497 (1998-02-01), Yokoyama et al.
patent: 6669350 (2003-12-01), Yamashita et al.
patent: 7125137 (2006-10-01), Kitajima et al.
patent: 2005/0190562 (2005-09-01), Keuper et al.
patent: 2006/0072339 (2006-04-01), Li et al.
patent: 2007/0279727 (2007-12-01), Gandhi et al.

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