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. 09, 2014
Filed:
Mar. 15, 2012
Jeffery R Parker, Richfield, OH (US);
Timothy a Mccollum, Avon Lake, OH (US);
Fumitomo Hide, San Jose, CA (US);
Alexey Titov, Sagamore Hills, OH (US);
Ian Hardcastle, Sunnyvale, CA (US);
Jeffery R Parker, Richfield, OH (US);
Timothy A McCollum, Avon Lake, OH (US);
Fumitomo Hide, San Jose, CA (US);
Alexey Titov, Sagamore Hills, OH (US);
Ian Hardcastle, Sunnyvale, CA (US);
Rambus Delaware LLC, Brecksville, OH (US);
Abstract
A light bulb includes a base for mechanically mounting the light bulb and for receiving electrical power, a light guide, and a light source that directs output light into the light guide. The light source includes a light emitting device that emits light, and a variable spectrum adjuster that is variably positionable relative the light path of light emitted by the light emitting device. The spectrum adjuster includes a region of continuously-variable spectrum-adjusting material, usable for adjusting the spectrum of light passing through the spectrum adjuster. In some embodiments, the spectrum adjusting material is a color-attenuating material, such as a filtering material. In other embodiments, the spectrum-adjusting material is a wavelength-shifting material, such as a phosphor, or another suitable type of material that shifts the wavelength of light incident.