Back light module

Details Back light module Back light module

2005-01-18

2005-01-18

Sember, Thomas M. (Department: 2875)

Illumination

Plural light sources

With modifier

C362S244000, C362S245000, C362S329000

Reexamination Certificate

active

06843582

ABSTRACT:
An improved back light module that the special design of light guide plate can prevent from the non-uniform of illumination. The module includes a light source; a reflector below the light source to reflect back the downward light rays for increasing the illumination of the back light module; and a light guide plate above said light source that a first portion of the bottom surface of said light guide plate, which is over said light source, is a plane and a second portion of the bottom/top surface of said light guide plate, which is not over said light source, has a plurality of regular bumps/recesses for focusing the light rays to increase the illumination, wherein said first portion and said second portion are arranged alternately in order.

REFERENCES:
patent: 5128783 (1992-07-01), Abileah et al.
patent: 5384658 (1995-01-01), Ohtake et al.
patent: 6578990 (2003-06-01), Hildenbrand et al.
patent: 6666569 (2003-12-01), Obata

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