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:
Sep. 28, 2010
Filed:
Sep. 25, 2007
Michael Mcmillan, Sanford, NC (US);
Michael McMillan, Sanford, NC (US);
CREE, Inc., Durham, NC (US);
Abstract
Light emitting device multi-chip lighting units and related methods are disclosed. According to one aspect, a white LED chip, a red LED chip, a blue LED chip, and a green LED chip are operably configured to a semiconductor substrate positioned within a lighting unit housing. The lighting unit can therefore provide a white light beam, a red light beam, a green light beam, and a blue light beam. The LED chips can be configured on the substrate such that the emitted light beams can overlap. Thus, in addition to the white LED chip providing a white light beam, the red LED chip, the blue LED chip, and the green LED chip can be actuated simultaneously with the white LED chip to combine and emit a more powerful and intense white light beam. Additionally, the red LED chip, the blue LED chip and the green LED chip can be actuated simultaneously to emit an intermediary intensity white light beam from the lighting unit.