LIGHT EMITTING DIODE (LED) COMPONENTS AND METHODS

• US 20160133610A1
• Filed: 11/11/2014
• Published: 05/12/2016
• Est. Priority Date: 11/11/2014
• Status: Active Grant

• Current Assignee: Creeled Incorporated
• Original Assignee: CREE Incorporated (Wolfspeed, Inc.)
• Inventors: Blakely, Colin Kelly, Pun, Arthur Fong-Yuen, Trottier, Troy Anthony, Reiherzer, Jesse Colin
• Granted Patent: US 10,453,825 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48137 the bodies being arranged next to each other, e.g. on a common substrate
• CPC Class Codes: H01L 2224/48227 connecting the wire to a bond pad of the item
• CPC Class Codes: H01L 2224/8592 Applying permanent coating, e.g. protective coating
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• 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 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2924/10155 being other than a cuboid
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

Light emitting diode (LED) components and related methods are disclosed. LED components include a submount, at least one LED chip on a first surface of the submount, and a non-reflective, light permeable structure or dam. The light permeable dam can provide a component having a viewing angle that is greater than 115°. A method of providing an LED component includes providing a non-metallic submount, attaching at least one LED chip to a first surface of the submount, and dispensing a non-reflective, light permeable dam over the first surface of the submount about the at least one LED chip thereby providing a component having a viewing angle that is greater than 115°.

Claims

1. A light emitting diode (LED) component, comprising:

a submount;

at least one LED chip disposed on a first surface of the submount; and

a non-reflective, light permeable dam disposed on the first surface of the submount around the at least one LED chip thereby providing a component having a viewing angle that is greater than 115°

.

2. The component of claim 1, wherein component comprises a viewing angle that is approximately 120°

or more.

3. The component of claim 1, wherein component comprises a viewing angle that is approximately 130°

or more.

4. The component of claim 1, wherein component comprises a viewing angle that is approximately 140°

or more.

5. The component of claim 1, wherein component comprises a viewing angle that is approximately 160°

or more.

6. The component of claim 1, wherein the non-reflective, light permeable dam extends only peripherally around the at least one LED chip.

7. The component of claim 1, wherein a filler material is disposed between opposing surfaces of the dam.

8. The component of claim 7, wherein the filler material comprises phosphor.

9. The component of claim 1, wherein the dam is a silicone dam and further comprises one or more light-permeable binders or fillers, and wherein the one or more binders or fillers comprises fumed silica, silica gel, nanomaterials, ceramic nanoparticles, ceramic micro-particles, quantum dots, phosphor, ceramic fibers, non-ceramic fibers, or any combination thereof.

10. The component of claim 1, wherein the submount comprises alumina, zirconia, or a mixture, composite or alloy thereof.

11. The component of claim 1, further comprising a plurality of LED chips that are configured to collectively emit white light.

12. A light bulb incorporating the component of claim 1.

13. A light emitting diode (LED) component, comprising:

a submount;

an array of LED chips disposed on a first surface of the submount;

a non-reflective, light permeable dam disposed on the first surface of the submount about the plurality of LED chips thereby providing a component having a viewing angle that is greater than 115°

; and

a filler material disposed over the array of LED chips and between portions of the dam, wherein the dam and the filler material each comprise multiple, discrete layers of material.

14. The component of claim 13, wherein the dam and the filler material each comprise two discrete layers of material.

15. The component of claim 13, wherein the dam and the filler material each comprise three discrete layers of material.

16. The component of claim 13, wherein the dam comprises at least one layer that is devoid of phosphor.

17. The component of claim 13, wherein the filler material comprises at least one layer that is devoid of phosphor.

18. The component of claim 13, wherein the dam comprises at least one layer that comprises phosphor.

19. The component of claim 13, wherein the filler material comprises at least one layer that comprises phosphor.

20. The component of claim 13, wherein component comprises a viewing angle that is approximately 120°

or more.

21. The component of claim 13, wherein component comprises a viewing angle that is approximately 140°

or more.

22. The component of claim 13, wherein the dam comprises silicone and one or more light-permeable binders or fillers.

23. The component of claim 22, wherein the one or more binders or fillers comprises fumed silica, silica gel, nanomaterials, ceramic nanoparticles, ceramic micro-particles, quantum dots, phosphor, ceramic fibers, non-ceramic fibers, or any combination thereof.

24. A method of providing a light emitting diode (LED) component, the method comprising:

providing a submount;

attaching at least one LED chip over a first surface of the submount; and

dispensing a non-reflective, light permeable dam over the first surface of the submount around the at least one LED chip thereby providing a component having a viewing angle that is greater than 115°

.

25. The method of claim 24, wherein component comprises a viewing angle that is approximately 120°

or more.

26. The method of claim 24, wherein component comprises a viewing angle that is approximately 140°

or more.

27. The method of claim 24, wherein component comprises a viewing angle that is approximately 160°

or more.

28. The method of claim 24, wherein dispensing the non-reflective, light permeable dam comprises dispensing clear silicone having one or more fillers or binders disposed therein.

29. The method of claim 28, wherein the one or more binders or fillers comprises fumed silica, silica gel, nanomaterials, ceramic nanoparticles, ceramic micro-particles, quantum dots, phosphor, ceramic fibers, non-ceramic fibers, or any combination thereof.

30. The method of claim 24, further comprising dispensing a filler material between surfaces of the dam.