Optical lens, optical package having the same, backlight...

Optical: systems and elements – Lens – With reflecting element

Reexamination Certificate

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C257S081000, C257S095000, C362S327000, C362S332000

Reexamination Certificate

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07746565

ABSTRACT:
An optical lens includes a recessed part and a refracting part. The recessed part has a substantially circular plan view and a substantially V shaped cross-section. The recessed part forms an angle of no more than an angle of about 20° with respect to a vertical line. The recessed part has a plurality of curved surfaces including different radii so that a light incident into the recessed part is totally reflected from the curved surfaces. The refracting part has a substantially circular plan view extended from the recessed part. A light incident into the refracting part and the reflected light from the recessed part are refracted from the refracting part. Therefore, a luminance uniformity and a color uniformity are improved.

REFERENCES:
patent: 6104545 (2000-08-01), Tsuchida
patent: 6674096 (2004-01-01), Sommers
patent: 6679621 (2004-01-01), West et al.
patent: 6755556 (2004-06-01), Gasquet et al.
patent: 7083313 (2006-08-01), Smith
patent: 7142769 (2006-11-01), Hsieh et al.
patent: 2003/0235050 (2003-12-01), West et al.
patent: 2004/0252390 (2004-12-01), Benitez et al.

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