Light bulb with adjustable light source

摘要

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.

主权项

1. A light bulb, comprising:
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 comprising:
a light emitting device electrically coupled to the base; anda variable spectrum adjuster in a light path of light emitted by the light emitting device, wherein:the light emitting device and the spectrum adjuster are positionable relative to one another;the spectrum adjuster comprises a color-attenuating region comprising color-attenuating material for attenuating a portion of the spectrum of the light, the color-attenuating material having a continuously varying color-attenuating property based on position in the color-attenuating region;the color-attenuating region has dimensions greater than the cross-sectional dimensions of the light path at the spectrum adjuster; andthe spectrum adjuster additionally comprises a non-color-attenuating region, adjacent to the color-attenuating region, the non-color-attenuating region containing no operably-effective amount of a color-attenuating material.