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.:
Date of Patent:
Feb. 15, 2022
Filed:
Aug. 06, 2014
Creeled, Inc., Durham, NC (US);
Fan Zhang, Goleta, CA (US);
James Ibbetson, Santa Barbara, CA (US);
Bernd Keller, Santa Barbara, CA (US);
Thodore Lowes, Lompoc, CA (US);
Antony Van De Ven, Sai Kung, HK;
Deborah Kircher, Santa Barbara, CA (US);
Tao Feng Gilbert, Goleta, CA (US);
Peter Andrews, Durham, NC (US);
CreeLED, Inc., Durham, NC (US);
Abstract
Light emitting diodes are disclosed that utilize multiple conversion materials in the conversion process in order to achieve the desired emission color point. Different embodiments of the present invention can comprise different phosphor types in separate layers on, above or around one or a plurality of LED chips to achieve the desired light conversion. The LEDs can then emit a desired combination of light from the LED chips and conversion material. In some embodiments, conversion materials can be applied as layers of different phosphor types in order of longest emission wavelength phosphor first, followed by shorter emission phosphors in sequence as opposed to applying in a homogeneously mixed phosphor converter. The conversion material layers can be applied as a blanket over the LED chips and the area surrounding the chip, such as the surface of a submount holding the LED chips.