Batwing LED with remote phosphor configuration
View Patent ↗A lighting apparatus includes a substrate. One or more light-emitting devices are disposed over the substrate. A lens is molded over the substrate and over the one or more light-emitting devices. A recess is disposed in the lens. The recess circumferentially surrounds the one or more light-emitting devices in a top view. The recess is at least partially filled with phosphor particles.
1. A lighting apparatus, comprising:
a substrate;
one or more light-emitting devices disposed over the substrate;
a lens that is molded over the substrate and over the one or more light-emitting devices; and
a recess disposed in the lens, wherein the recess circumferentially surrounds the one or more light-emitting devices in a top view, and wherein the recess is at least partially filled with phosphor particles.
2. The lighting apparatus of claim 1 , wherein the recess has a circular shape in a top view.
3. The lighting apparatus of claim 1 , wherein the recess has an elongate cross-sectional view and extends at least partially into the lens from a top surface of the lens.
4. The lighting apparatus of claim 1 , wherein the lens is configured to transmit light emitted by the one or more light-emitting devices in a batwing pattern.
5. The lighting apparatus of claim 1 , further comprising a reflective material disposed over at least a portion of a top surface of the lens.
6. The lighting apparatus of claim 5 , wherein the reflective material contains metal or metal oxide.
7. The lighting apparatus of claim 5 , wherein the portion of the top surface of the lens has a concaved cross-sectional profile.
8. The lighting apparatus of claim 5 , wherein the reflective material is disposed over an entirety of the top surface of the lens.
9. The lighting apparatus of claim 1 , wherein the lens contains silicone, resin, epoxy, or a poly(methyl methacrylate) (PMMA).
10. The lighting apparatus of claim 1 , wherein the substrate is a packaging substrate that contains one or more through substrate vias (TSVs).
11. The lighting apparatus of claim 1 , wherein the light-emitting devices include light-emitting diodes (LEDs).
12. A lighting apparatus, comprising:
a packaging substrate;
one or more light-emitting diodes (LEDs) located over the packaging substrate;
a molded lens disposed over the packaging substrate and housing the one or more LEDs therein;
a phosphor-containing trench that extends into the molded lens from an upper surface of the molded lens, wherein the phosphor-containing trench circumferentially surrounds the one or more LEDs in a top view; and
a reflector disposed over at least a portion of the upper surface of the molded lens.
13. The lighting apparatus of claim 12 , wherein the trench has a round top view pattern.
14. The lighting apparatus of claim 12 , wherein the molded lens is configured to transmit light emitted by the LEDs in a batwing pattern.
15. The lighting apparatus of claim 12 , wherein the upper surface of the molded lens includes a cavity, and wherein at least a portion of the reflector is disposed within the cavity.
16. The lighting apparatus of claim 12 , wherein the reflector is disposed over an entirety of the upper surface of the molded lens.
17. The lighting apparatus of claim 12 , wherein:
the molded lens contains silicone, resin, epoxy, or a poly(methyl methacrylate) (PMMA); and
the reflective material contains metal or metal oxide.
18. A lighting apparatus, comprising:
a packaging substrate;
one or more light-emitting diode (LED) dies bonded to the packaging substrate;
a molded lens formed over the packaging substrate and covering the one or more LED dies underneath, wherein a top surface of the molded lens includes a cavity;
one or more phosphor-containing trenches embedded in the molded lens, wherein the phosphor-containing trenches each circumferentially surround the one or more LED dies in a top view, and wherein at least one of the phosphor-containing trenches has a circular top view profile; and
a light-reflective element formed over at least a portion of the top surface of the molded lens, wherein at least a portion of the light-reflective element is formed in the cavity.
19. The lighting apparatus of claim 18 , wherein the molded lens is configured to transmit light emitted by the LED dies in a batwing pattern.
20. The lighting apparatus of claim 12 , wherein the light-reflective element is formed over an entirety of the top surface of the molded lens.