Hybrid combination of substrate and carrier mounted light emitting devices
View Patent ↗A multi-chip light emitting device (LED) uses a low-cost carrier structure that facilitates the use of substrates that are optimized to support the devices that require a substrate. Depending upon the type of LED elements used, some of the LED elements may be mounted on the carrier structure, rather than on the more expensive ceramic substrate. In like manner, other devices, such as sensors and control elements, may be mounted on the carrier structure as well. Because the carrier and substrate structures are formed independent of the encapsulation and other after-formation processes, these structures can be tested prior to encapsulation, thereby avoiding the cost of these processes being applied to inoperative structures.
1. A device comprising:
a substrate upon which one or more first light emitting elements are located;
a carrier upon which one or more second elements are located, wherein the substrate is situated within a receptacle in the carrier;
an encapsulant that encapsulates at least the first light emitting element and at least a portion of the carrier beyond the first light emitting element;
wherein at least one of the one or more second elements includes a second light emitting element.
2. The device of claim 1 , including a wavelength conversion element situated above one or more of the first and second light emitting elements.
3. The device of claim 1 , wherein at least one of the one or more first light emitting elements includes InGaN material and the second light emitting element includes AlInGaP material.
4. The device of claim 1 , wherein the encapsulant encapsulates an entirety of a surface of the substrate.
5. The device of claim 1 , wherein the first light emitting element is coupled to the carrier via one or more contact at one or more edges of the light emitting element.
6. The device of claim 1 , wherein the first light emitting element includes one or more contacts at a base of the light emitting element.
7. The device of claim 1 , wherein the second elements are located on a first surface of the carrier, and the carrier includes vias that facilitate connections to the device on a second surface of the carrier.
8. The device of claim 1 , wherein the receptacle is a hole in the carrier.
9. The device of claim 1 , wherein the receptacle is a recess in the carrier.
10. The device of claim 1 , wherein the receptacle is a first receptacle and the substrate is a first substrate, the device further comprising a second substrate upon which a third element is located, wherein the second substrate is situated within a second receptacle in the carrier.
11. The device of claim 1 , wherein the substrate is ceramic and the carrier is one of sheet metal, lead frame, fiberglass, and circuit board.
12. A device comprising:
a substrate upon which one or more first light emitting elements are located;
a carrier upon which one or more second elements are located, wherein the substrate is situated within a receptacle in the carrier;
an encapsulant that encapsulates at least the first light emitting element and at least a portion of the carrier beyond the first light emitting element; and
wherein at least one of the one or more second elements includes at least one of: a resistor, a capacitor, a rectifier, and one or more elements of an AC-DC converter.
13. A device comprising:
a substrate upon which one or more first light emitting elements are located;
a carrier upon which one or more second elements are located, wherein the substrate is situated within a receptacle in the carrier;
an encapsulant that encapsulates at least the first light emitting element and at least a portion of the carrier beyond the first light emitting element; and
wherein at least one of the one or more second elements includes a sensor.