The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 7478930 B1

PDF
Full Text
Expired
Date of Patent:
Jan. 20, 2009

Filed:

May. 11, 2006
Applicant:

Yong Won Choi, Kyungki-do, KR;

Inventor:

Yong Won Choi, Kyungki-do, KR;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A backlight unit includes a substrate, a plurality of light sources arranged on the substrate in a spaced-apart relationship with one another for irradiating lights, a total reflection layer for upwardly reflecting the lights irradiated from the light sources, and an optical layer disposed above the light sources and having an oxide compound layer laminated thereon. The optical layer is adapted to allow a part of the lights to pass through the optical layer but reflect the remaining part of the lights downwardly toward the substrate, to thereby induce the lights from the light sources to optically resonate. The optical resonance caused by the oxide compound-laminated optical layer helps to reduce the half amplitude of a color-based spectrum histogram in a light-emitting spectrum, thereby enhancing the color purity.


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Choi, Yong. (2009). Backlight unit with an oxide compound-laminated optical layer (U.S. Patent No. 7478930). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7478930

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