Prism sheet and backlight module using the same

Details Prism sheet and backlight module using the same Prism sheet and backlight module using the same

2007-11-29

2009-12-08

Choi, Jacob Y (Department: 2885)

Illumination

Light modifier

Refractor

C362S330000, C362S339000, C362S620000, C362S626000

Reexamination Certificate

active

07628514

ABSTRACT:
An exemplary prism sheet includes a transparent main body. The main body includes a first surface and a second surface. The first surface is opposite to the second surface. A plurality of elongated arc-shaped depressions are defined in the first surface. A plurality of micro-depressions are defined in the second surface. Each micro-depression is defined by at least three connecting sidewalls. A transverse width of each sidewall of each micro-depression progressively decreases with increasing distance from the second surface. A backlight module using the present prism sheet is also provided.

REFERENCES:
patent: 6606133 (2003-08-01), Okabe
patent: 7320538 (2008-01-01), Ko et al.
patent: 7445361 (2008-11-01), Hsu et al.
patent: 2005/0013001 (2005-01-01), Pan et al.
patent: 2006/0256582 (2006-11-01), Chuang
patent: 2007/0014034 (2007-01-01), Lee et al.
patent: 2007/0171671 (2007-07-01), Kurokawa et al.

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