Planar light source device and display using the same

Details Planar light source device and display using the same Planar light source device and display using the same

2006-06-27

2009-12-22

Truong, Bao Q (Department: 2875)

Illumination

Plural light sources

With modifier

C362S330000

Reexamination Certificate

active

07635200

ABSTRACT:
A planar light source device having excellent in-plane uniformity of brightness includes an illuminator having an array of light sources, a light transmission plate in an optical path of light output by the illuminator, and a plurality of refractive diffusing elements on the light transmission plate, each refractive diffusing element providing more than two refractive surfaces in at least one vertical cross-section along the optical path at an angle determined in accordance with a pattern of the array of light sources. Each refractive diffusing element may be a polygonal prism or a microlens.

REFERENCES:
patent: 5579134 (1996-11-01), Lengyel
patent: 7220038 (2007-05-01), Yamashita et al.
patent: 2005/0099815 (2005-05-01), Kim et al.
patent: 05-038216 (1993-02-01), None
patent: 6-250178 (1994-09-01), None

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