LED ARRAY PACKAGE

• US 20160035950A1
• Filed: 07/31/2014
• Published: 02/04/2016
• Est. Priority Date: 07/31/2014
• Status: Active Grant

• Current Assignee: Bridgelux Incorporated
• Original Assignee: Bridgelux Incorporated
• Inventors: ODNOBLYUDOV, Vladimir, WEST, Scott, BASCERI, Cem, GAN, Zhengghng
• Granted Patent: US 10,205,069 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01L 33/46 Reflective coating, e.g. dielectric Bragg reflector
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin

Abstract

Various aspects of a light emitting apparatus includes a substrate. Various aspects of the light emitting apparatus include a light emitting die arranged on the substrate. The light emitting die includes one or more side walls. Various aspects of the light emitting apparatus include a reflective die attach material extending along the one or more side walls of the light emitting die.

Claims

1. A light emitting apparatus comprising:

a substrate; and

a light emitting die configured to emit light, the light emitting die being arranged on the substrate and having one or more side walls; and

a die attach material extending along the one or more side walls of the light emitting die, the die attach material being reflective to the light.

2. The light emitting apparatus of claim 1, wherein the light emitting die comprises a substrate translucent or transparent to the light.

3. The light emitting apparatus of claim 1, wherein the die attach material comprises white epoxy.

4. The light emitting apparatus of claim 3, wherein the white epoxy comprises 10% greater light output than a silver epoxy.

5. The light emitting apparatus of claim 1, wherein the die attach material extends along at least half of a height of the one or more side walls.

6. The light emitting apparatus of claim 1, wherein the light emitting die comprises a gallium nitride layer over an aluminum nitride substrate.

7. The light emitting apparatus of claim 6, further comprising a layer reflective to the light between the gallium nitride layer and the aluminum nitride substrate.

8. The light emitting apparatus of claim 1, wherein the light emitting die comprises a vertical LED.

9. The light emitting apparatus of claim 1, further comprising one or more additional light emitting dies arranged on the substrate and being configured to emit light.

10. The light emitting apparatus of claim 9, further comprising a phosphor layer covering the light emitting dies, wherein the phosphor layer is configured to scatter the light.

11. The light emitting apparatus of claim 10, wherein the die attach material is configured to prevent absorption of the scattered light.

12. A light emitting apparatus comprising:

a substrate; and

a light emitting die configured to emit light, the light emitting die being arranged on the substrate and having a carrier substrate translucent or transparent to the light.

13. The light emitting apparatus of claim 12, wherein the light emitting die comprises a vertical LED.

14. The light emitting apparatus of claim 12, wherein the carrier substrate comprises aluminum nitride.

15. The light emitting apparatus of claim 12, further comprising a layer arranged over the carrier substrate, the layer being reflective to the light.

16. The light emitting apparatus of claim 12, further comprising one or more additional light emitting dies arranged on the substrate and configured to emit light.

17. The light emitting apparatus of claim 16, further comprising a phosphor layer covering the light emitting dies, wherein the phosphor layer is configured to scatter the light.

18. A lamp comprising:

a housing;

a light emitting apparatus coupled to the housing, the light emitting apparatus comprising;

a substrate;

a plurality of light emitting dies configured to emit light, the light emitting dies being arranged on the substrate and having one or more side walls; and

a die attach material extending along the one or more side walls of each of the light emitting dies, the die attach material being reflective to the light.

19. The lamp of claim 18, wherein the plurality of light emitting dies comprises a plurality of vertical LEDs.

20. The lamp of claim 19, further comprising a material over the vertical LEDs to scatter the light.

21. The lamp of claim 20, wherein the light scattering material comprises phosphor.

22. The lam of claim 20, wherein the die attach material is configured to prevent absorption of the scattered light between the plurality of vertical LEDs.