Back light module having concave-down luminance distribution

Details Back light module having concave-down luminance distribution Back light module having concave-down luminance distribution

2005-07-20

2008-12-30

Ward, John A (Department: 2885)

Illumination

Edge lighted panel

Light guide

C362S561000, C349S065000, C385S132000

Reexamination Certificate

active

07470053

ABSTRACT:
Several optical mechanism designs for making luminance of the outer portion of a back light module of edge lighting type to become higher than luminance of the inner portion of the back light module are disclosed in accordance with the present invention. The disclosed optical mechanism designs can cooperate with each other to enhance the optical effect of the back light module. Additionally, the back light modules of the present invention are feasible for use in various scanners or liquid crystal displays.

REFERENCES:
patent: 6108060 (2000-08-01), Funamoto et al.
patent: 7165874 (2007-01-01), Nagakubo et al.
patent: 7172327 (2007-02-01), Kuo
patent: 7290921 (2007-11-01), Lin
patent: 1499263 (2004-05-01), None
patent: 2627536 (2004-07-01), None
patent: 1538216 (2004-10-01), None

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