LOW PROFILE LED-BASED LIGHTING ARRANGEMENTS
Disclosed are LED-based lighting arrangements that include an integrated lighting component that includes both a photoluminescence wavelength conversion portion and a diffusing portion. The integrated lighting component can be used to implement low-profile lighting arrangements having very small installation space requirements.
1 . A lighting apparatus, comprising:
an integrated wavelength conversion component comprising a light diffusive portion and a wavelength conversion portion, wherein the light diffusive portion comprises a diffusing material and the wavelength conversion portion comprises a photoluminescent material;
a housing for the integrated wavelength conversion component; and
wherein the integrated wavelength conversion component functions as a final stage optic for the lighting apparatus.
2 . The apparatus of claim 1 , wherein the housing comprises a shallow depression to house the integrated wavelength conversion component.
3 . The apparatus of claim 2 , wherein the housing comprises a central recessed portion and the integrated wavelength conversion component is placed into the central recessed portion.
4 . The apparatus of claim 1 , wherein the integrated wavelength conversion component comprises a generally toroidal indentation, and the wavelength conversion portion is formed in the indentation.
5 . The apparatus of claim 4 , wherein the wavelength conversion portion comprises a generally semi-circular, generally elliptical or dome-shaped cross-sectional profile.
6 . The apparatus of claim 4 , wherein the housing comprises a circuit board having an array of solid-state light emitters, and the array of solid-state light emitters matches the toroidal indentation.
7 . The apparatus of claim 1 , wherein the diffusing portion having the diffusing material is positioned at the exterior of the integrated wavelength conversion component.
8 . The apparatus of claim 8 , wherein the diffusing material is distributed within the diffusing portion.
9 . The apparatus of claim 1 , further comprising an optical medium within a cavity formed between the wavelength conversion portion and an array of solid state light emitters.
10 . The apparatus of claim 1 , wherein the housing has a dish-shaped recess and a bezel.
11 . The apparatus of claim 1 , wherein the integrated wavelength conversion component comprises a base having mounting clips.
12 . The apparatus of claim 1 , wherein the integrated wavelength conversion component is integrally formed with the base having the mounting clips.
13 . The apparatus of claim 1 , wherein the diffusing portion and the wavelength conversion portion are molded into the integrated wavelength conversion component.
14 . The apparatus of claim 1 , wherein the wavelength conversion portion is remote from an array of solid-state light emitters.
15 . The apparatus of claim 1 , wherein the wavelength conversion portion comprises multiple wavelength conversion regions.
16 . The apparatus of claim 15 , in which the multiple wavelength conversion regions extends in a radial direction.
17 . The apparatus of claim 15 , in which the multiple wavelength conversion regions comprise concentric regions.
18 . The apparatus of claim 17 , in which the concentric regions comprise concentric rectangular regions.