LIGHTING DEVICE

• US 20120018751A1
• Filed: 09/15/2011
• Published: 01/26/2012
• Est. Priority Date: 05/23/2006
• Status: Active Grant

• Current Assignee: Creeled Incorporated
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: NEGLEY, Gerald H., VAN DE VEN, Antony Paul
• Granted Patent: US 8,529,104 B2
• Time in Patent Office: Days
• US Class Current: 257/89
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A first lighting device comprises at least one plural cavity element and a plurality of solid state light emitters. A second lighting device comprises at least one plural cavity element, a plurality of solid state light emitters and at least one encapsulant region, at least a portion of the plural cavity element being surrounded by the encapsulant region. Each plural cavity element has at least two optical cavities. Each optical cavity comprises a concave region in the plural cavity element. At least one solid state light emitter is present in each of at least two of the optical cavities.

Claims

1. A lighting device comprising:

at least one plural cavity element, said plural cavity element having at least two optical cavities, each of said optical cavities comprising a concave region in said plural cavity element; and

a plurality of solid state light emitters, at least a first solid state light emitter present in a first optical cavity and at least a second solid state light emitter present in a second optical cavity, said first solid state light emitter comprising a first luminescent material, said second solid state light emitter comprising a second luminescent material, said first luminescent material differing from said second luminescent material.

2. A lighting device as recited in claim 1, wherein:

said plural cavity element further comprises a third optical cavity,

at least a third solid state light emitter is present in said third optical cavity, and

said third solid state light emitter is a narrow spectrum solid state light emitter.

3. A lighting device comprising:

at least one plural cavity element, said plural cavity element having at least two optical cavities, each of said optical cavities comprising a concave region in said plural cavity element; and

a plurality of solid state light emitters,

at least a first solid state light emitter present in a first optical cavity and at least a second solid state light emitter present in a second optical cavity, said first solid state light emitter comprising a broad spectrum luminescent material, said second solid state light emitter being a narrow spectrum solid state light emitter whereby narrow spectrum light is emitted from said second optical cavity.

4. A lighting device as recited in claim 3, wherein said first solid state light emitter comprises a first light emitting diode which emits light having a first wavelength range,

said second solid state light emitter comprises a second light emitting diode which emits light having a second wavelength range, and

said first wavelength range differs from said second wavelength range.

5. A lighting device comprising:

at least one plural cavity element, said plural cavity element having at least two optical cavities, each of said optical cavities comprising a concave region in said plural cavity element;

a plurality of solid state light emitters, at least one of said solid state light emitters present in each of at least two of said optical cavities,

said plurality of solid state light emitters arranged electrically in parallel.

6. A lighting device as recited in claim 5, wherein at least one broad spectrum solid state light emitter is provided in a first of said optical cavities and at least one narrow spectrum solid state light emitter is provided in a second of said optical cavities.