US Patent No. 10,260,684

LOW AND HIGH BEAM LED LAMP


Patent No. 10,260,684
Issue Date April 16, 2019
Title Low And High Beam Led Lamp
Inventorship Marcus Johannes Gerardus Elzinga, Eindhoven (NL)
Paul Scott Martin, San Jose, CA (US)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,260,684

1. A light emitting diode (LED) bulb for emitting at least two levels of light having different emission patterns and comprising a light emitting structure, the light emitting structure comprising:a plurality of first light emitting diode (LED) dies, each of the first LED dies having a first electrode and a second electrode, wherein the first electrode of each of the first LED dies is electrically and thermally coupled to a lead frame;
a plurality of second LED dies, each of the second LED dies having a third electrode and a fourth electrode, wherein the third electrode of each of the second LED dies is electrically and thermally coupled to the lead frame;
a plurality of third LED dies, each of the third LED dies having a fifth electrode and a sixth electrode, wherein the fifth electrode of each of the third LED dies is electrically and thermally coupled to the lead frame,
wherein, on the lead frame, the second LED dies and the third LED dies are both spaced away from the first LED dies, and
wherein the lead frame is configured so that light emitting top surfaces of the first LED dies face a first direction, light emitting top surfaces of the second LED dies face a second direction, and light emitting top surfaces of the third LED dies face a third direction, the first direction being different from the second and third directions, and the second and third directions being opposite to each other; and
wherein portions of the lead frame terminate in connectors extending from a thermally conductive thermoplastic body, wherein the thermally conductive thermoplastic body comprises:
first light blocking features for the first LED dies to cause the first LED dies to have a first emission pattern; and
second light blocking features for the second and third LED dies to cause the second and third LED dies to have a second emission pattern different from the first emission pattern, wherein
the first light blocking features comprise:
at least one lateral light blocking wall for the first LED dies;
at least one light blocking surface for the first LED dies; and
the second light blocking features comprise:
at least one light blocking surface for each of the second and third LED dies; and
the thermally conductive thermoplastic body comprises:
a front portion that blocks forward light from the first LED dies and the second and third LED dies.