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 8297781 B1

PDF
Full Text
Expired
Date of Patent:
Oct. 30, 2012

Filed:

Apr. 24, 2009
Applicants:

Tak Meng Cheang, Sg Nibong, MY;

Boon Keat Tan, Singapore, SG;

Scott Weitzel, Brighton, CO (US);

Inventors:

Tak Meng Cheang, Sg Nibong, MY;

Boon Keat Tan, Singapore, SG;

Scott Weitzel, Brighton, CO (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21V 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

In an embodiment, the invention provides a multi-color illuminating back light structure comprising a light guide, a reflector, at least one LED and a wavelength converter material. Micro-structures are formed on a first surface of the light guide. The reflector is attached to the first surface of the light guide. A wavelength converter material is deposited on a second surface of the light guide. At least one LED is optically coupled to at least one side of the light guide. A portion of light reflected from the micro-structures and the reflector is converted into light having at least one wavelength different from the wavelength of the reflected light. The light leaving the wavelength converter material comprises light with at least first and second wavelengths.


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Cheang, Tak. (2012). Multi-color illuminating back light structure (U.S. Patent No. 8297781). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8297781

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