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:
Oct. 06, 2015
Filed:
Dec. 19, 2011
Andrew J. Ouderkirk, St. Paul, MN (US);
Xiaohui Cheng, Singapore, SG;
Ravi Palaniswamy, Singapore, SG;
Arokiaraj Jesudoss, Singapore, SG;
Yarn Chee Poon, Singapore, SG;
Zhisheng Yun, Woodbury, MN (US);
Andrew J. Ouderkirk, St. Paul, MN (US);
Xiaohui Cheng, Singapore, SG;
Ravi Palaniswamy, Singapore, SG;
Arokiaraj Jesudoss, Singapore, SG;
Yarn Chee Poon, Singapore, SG;
Zhisheng Yun, Woodbury, MN (US);
3M Innovative Properties Company, St. Paul, MN (US);
Abstract
A light source combines colored light from different LED sources to provide white light output. Multiple LEDs emitting light at different peak wavelengths may be disposed on a flexible substrate, the LEDs being close to an aperture formed in the substrate. Multiple mirrors, including at least one dichroic mirror, are oriented to reflect light from the multiple LEDs into the aperture. The flexible substrate includes a dielectric layer having a cavity region and an adjacent neighboring region that is thicker than the cavity region. The aperture and the multiple LEDs are all disposed in the cavity region of the dielectric layer. An integrating rod may be coupled to the aperture to receive the reflected light from the multiple LEDs.