LED lamp with remote phosphor and diffuser configuration utilizing red emitters

摘要

Lamps and bulbs are disclosed generally comprising different combinations and arrangement of a light source, one or more wavelength conversion materials, regions or layers which are positioned separately or remotely with respect to the light source, and a separate diffusing layer. This arrangement allows for the fabrication of lamps and bulbs that are efficient, reliable and cost effective and can provide an essentially omni-directional emission pattern, even with a light source comprised of a co-planar arrangement of LEDs. Additionally, this arrangement allows aesthetic masking or concealment of the appearance of the conversion regions or layers when the lamp is not illuminated. Some embodiments of the present invention utilize LED chips to provide one or more lighting components instead of providing the components through phosphor conversion. This can provide for lamps that can be operated with lower power and can be manufactured at lower cost. In one embodiment, a red lighting component can be provided by red emitting LEDs as opposed to a red conversion material.

主权项

1. A solid state lamp, comprising:
a first light emitting diode (LED) emitting light at a first peak emission; a second LED emitting light at a second respective peak emission; a conversion material spaced from said first and second LEDs with light from said first and second LEDs passing through said conversion material, wherein said conversion material absorbs at least some of said light from said first LED and re-emits light at a third respective peak emission, said lamp emitting a combination of light from said first, second and third peak emissions; and a diffuser over and spaced from said conversion material; wherein said conversion material is globe-shaped, such that the portion of said globe-shaped conversion material closest to said LEDs is narrower than the widest portion of said globe-shaped conversion material.