LED lamp with shaped light distribution
View Patent ↗A lamp comprises an optically transmissive enclosure. A plurality of LEDs for emitting light are located to emit light toward the enclosure. The enclosure has at least one reflective area disposed on the enclosure to reflect a portion of the light into the enclosure to create a desired luminous intensity distribution.
1. A lamp comprising:
an optically transmissive enclosure;
a base connected to the optically transmissive enclosure;
a plurality of LEDs for emitting light disposed on at least one mount and facing the interior of the enclosure, the plurality of LEDs emitting light when energized through an electrical path from the base;
at least one reflective area spaced from the base and provided on the optically transmissive enclosure wherein the at least one reflective area comprises a reflective tape that is at least approximately 90% light reflective.
2. The lamp of claim 1 where the at least one reflective area reflects light toward the interior of the enclosure.
3. The lamp of claim 1 where the enclosure comprises a diffuser layer for scattering the light to produce a broad beam intensity profile.
4. The lamp of claim 3 wherein the diffuser layer is applied over the entire enclosure.
5. The lamp of claim 1 wherein the reflective tape comprises a pressure sensitive tape.
6. The lamp of claim 1 wherein the reflective tape comprises a reflective surface, the reflective surface facing the interior of the enclosure.
7. The lamp of claim 1 wherein the at least one reflective area is arranged such that the light intensity distribution of the lamp matches a desired light intensity distribution.
8. The lamp of claim 1 wherein the at least one reflective area comprises an insert that is attached to the enclosure.
9. The lamp of claim 8 wherein the insert is attached to the enclosure by one of adhesive, welding and a mechanical connection.
10. The lamp of claim 8 wherein the insert is insert molded in the enclosure.
11. The lamp of claim 1 wherein the at least one reflective area is located at or near the 0 degree angle at the free end of the lamp.
12. The lamp of claim 1 wherein the at least one mount comprises at least a first mount and a second mount and the at least one reflective area is located between the first mount and the second mount.
13. The lamp of claim 12 wherein the at least one reflective area is located at the approximate 90 degree angle of the lamp.
14. The lamp of claim 1 wherein the at least one reflective area comprises a first reflective area is located at or near the approximate 0 degree angle of the lamp and a second reflective area located at or near the approximate 90 degree angle of the lamp.
15. The lamp of claim 1 wherein visible indicia is provided on the at least one reflective area.
16. A lamp comprising:
an optically transmissive enclosure;
a plurality of LEDs for emitting light toward the enclosure;
the enclosure having at least one reflective area disposed on or within the enclosure to reflect a portion of the light into the enclosure to create a desired luminous intensity distribution wherein a first one of the at least one reflective area is surrounded by the optically transmissive enclosure, the first one of the reflective area being at least approximately 90% light reflective over the entire reflective area.
17. A lamp comprising:
an optically transmissive enclosure;
a base connected to the optically transmissive enclosure;
a plurality of LEDs for emitting light disposed on at least one mount and facing the interior of the enclosure, the plurality of LEDs emitting light when energized through an electrical path from the base;
at least one reflective area spaced from the base and provided on the optically transmissive enclosure wherein the at least one reflective area comprises a first portion of the enclosure that is thicker than a second portion of the enclosure.
18. The lamp of claim 17 wherein the enclosure is made of a molded plastic.
19. The lamp of claim 18 wherein the plastic is made of acrylic.