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:
Aug. 23, 2005
Filed:
Oct. 31, 2003
Daniel A. Steigerwald, Cupertino, CA (US);
William D. Collins Iii, San Jose, CA (US);
Robert M. Fletcher, San Jose, CA (US);
Michael J. Ludowise, San Jose, CA (US);
Jason L. Posselt, San Jose, CA (US);
Daniel A. Steigerwald, Cupertino, CA (US);
William D. Collins III, San Jose, CA (US);
Robert M. Fletcher, San Jose, CA (US);
Michael J. Ludowise, San Jose, CA (US);
Jason L. Posselt, San Jose, CA (US);
Lumileds Lighting U.S., LLC, San Jose, CA (US);
Abstract
A structure includes semiconductor light emitting device and a wavelength converting layer. The wavelength converting layer converts a portion of the light emitted from the semiconductor light emitting device. The dominant wavelength of the combined light from the semiconductor light emitting device and the wavelength converting layer is essentially the same as the wavelength of light emitted from the device. The wavelength converting layer may emit light having a spectral luminous efficacy greater than the spectral luminous efficacy of the light emitted from the device. Thus, the structure has a higher luminous efficiency than a device without a wavelength converting layer.