Light-emitting diode replacement lamp
View Patent ↗In various embodiments, an illumination device includes a primary light emitter for providing direct illumination and a secondary light emitter for illuminating a shade, thereby providing decorative illumination.
1. An illumination device comprising:
a primary light emitter for providing direct illumination;
a secondary light emitter, different from the primary light emitter, for providing decorative illumination; and
an envelope (i) spaced away from and disposed around at least the secondary light emitter, (ii) comprising a first portion for receiving light emitted by the primary light emitter and transmitting the received light from the primary light emitter, substantially without modification thereof, as direct illumination through the first portion of the envelope in a first direction, and (iii) comprising a second portion, different from the first portion, (a) for receiving light emitted by the secondary light emitter, and (b) incorporating an optical element for modifying received light, the received light from the secondary light emitter being modified by the optical element and forming decorative illumination transmitted through the second portion of the envelope in a second direction different from the first direction.
2. The illumination device of claim 1 , further comprising an electrical connector for receiving power from an external source.
3. The illumination device of claim 1 , further comprising a circuit for regulating the power from the external source and providing the regulated power to the primary and secondary light emitters.
4. The illumination device of claim 1 , wherein a shape of the envelope corresponds to at least a portion of a shape of an incandescent or halogen light bulb the illumination device is designed to replace.
5. The illumination device of claim 1 , wherein the primary light emitter comprises at least one light-emitting diode.
6. The illumination device of claim 1 , wherein the secondary light emitter comprises at least one light-emitting diode.
7. The illumination device of claim 1 , wherein the direct illumination is distinct from the decorative illumination in terms of at least one of intensity or color.
8. The illumination device of claim 1 , wherein the optical element comprises at least one of a mask for blocking a portion of the light from the secondary light emitter, a reflective element for reflecting light from the secondary light emitter, or a diffractive element for diffracting light from the secondary light emitter.
9. The illumination device of claim 1 , wherein the optical element comprises a phosphor for converting a wavelength of light from the secondary light emitter to a different wavelength.
10. The illumination device of claim 9 , wherein the decorative illumination comprises only light converted by the phosphor.
11. The illumination device of claim 9 , wherein the decorative illumination comprises a mixture of unconverted light emitted by the secondary light emitter and light converted by the phosphor.
12. The illumination device of claim 1 , wherein the first portion of the envelope defines an opening through which at least a portion of the direct illumination is emitted.
13. The illumination device of claim 1 , wherein the first portion of the envelope is substantially transparent.
14. The illumination device of claim 1 , wherein at least one of the first or second portions of the envelope is removable from the primary and secondary light emitters, thereby enabling replacement with at least a portion of a second envelope having a different light-transmission property.