IP Library Granted Patent US 10,153,260
Granted Patent B2
US 10,153,260 · App. 15/878,720 · Granted Dec 11, 2018

Light-emitting diode (LED) device

Inventors: Ji-hye Yeon (Cheongju-si, KR); Wan-tae Lim (Suwon-si, KR); Young-soo Park (Yongin-si, KR); Jung-sub Kim (Hwaseong-si, KR); Jin-sub Lee (Suwon-si, KR); Ha-nul Yoo (Goyang-si, KR); Hye-seok Noh (Suwon-si, KR)
Assignee: SAMSUNG ELECTRONICS, CO., LTD.
H01L25/0753H01L33/50H01L33/504H01L33/60
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Quick Facts
Patent No.
US 10,153,260
App. No.
15/878,720
Granted
Dec 11, 2018
Kind
B2
Abstract

A light-emitting diode (LED) device configured to provide a multi-color display includes a plurality of light-emitting cells at least partially defined by a partition layer. The LED device may be configured to reduce optical interferences between the light-emitting cells. The LED device includes a plurality of light-emitting structures spaced apart from one another; a plurality of electrode layers on respective first surfaces of the light-emitting structures, a separation layer configured to electrically insulate the light-emitting structures from each other; phosphor layers on respective second surfaces of the light-emitting structures and associated with different colors, and a partition layer between the phosphor layers to separate the phosphor layers from one another. Each light-emitting cell may include a separate light-emitting structure, a separate set of one or more electrodes, and a separate phosphor layer.

Claims (58)

1. A light-emitting diode (LED) device comprising:

a plurality of light-emitting structures spaced apart from each other, each light-emitting structure including a first surface and a second surface;

a plurality of electrode layers on first surfaces of separate, respective light-emitting structures of the plurality of light-emitting structures;

a separation layer configured to isolate the plurality of light-emitting structures from each other;

a plurality of phosphor layers on second surfaces of separate, respective light-emitting structures of the plurality of light-emitting structure; and

a partition layer between the phosphor layers, such that the partition layer separates the phosphor layers from each other.

2. The LED device of claim 1 , further comprising:

a reflective layer between an electrode layer, of the plurality of electrode layers, and a light-emitting structure, of the plurality of light-emitting structures.

3. The LED device of claim 1 , further comprising:

an uneven structure on a surface of a light-emitting structure, of the plurality of light-emitting structures.

4. The LED device of claim 1 , wherein the partition layer includes one or more sidewalls associated with a slope, such that the one or more sidewalls define a space having a distal end and proximate end in relation to at least one light-emitting structure of the plurality of light-emitting structures, the distal end having a greater diameter than the proximate end.

5. The LED device of claim 1 , wherein the partition layer includes a single body structure.

6. The LED device of claim 1 , further comprising:

a light reflecting layer on a sidewall of the partition layer.

7. The LED device of claim 1 , wherein the separation layer includes,

a separating insulation layer on first sidewalls and bottom surfaces of the light-emitting structures, and

a mold insulation layer configured to

insulate the electrode layers from each other, respectively, and

insulate the light-emitting structures from each other, respectively.

8. The LED device of claim 1 , wherein the separation layer includes,

a separating insulation layer on first sidewalls and bottom surfaces of the light-emitting structures,

a metal layer insulated from the light-emitting structures by the separating insulation layer, and

a mold insulation layer configured to insulate the electrode layers from the metal layer.

9. The LED device of claim 1 , wherein,

the separation layer includes,

a first separating insulation layer on first sidewalls and bottom surfaces of the light-emitting structures,

a first metal layer insulated from the light-emitting structures by the first separating insulation layer, and

a mold insulation layer insulating the electrode layers from one another; and

the partition layer includes,

a second separating insulation layer on first sidewalls of the plurality of phosphor layers, the second separating insulation layer extending from the first separating insulation layer, and

a second metal layer on the first sidewalls of the plurality of phosphor layers, the second metal layer extending from the first metal layer.

10. The LED device of claim 9 , wherein,

the first separating insulation layer and the second separating insulation layer are included in a common separating insulation layer;

the first metal layer and the second metal layer are included in a common metal layer;

the separation layer includes the first separating insulation layer and the first metal layer; and

the partition layer includes the second separating insulation layer and the second metal layer.

11. The LED device of claim 1 , wherein each phosphor layer is configured to filter a different color of light from light emitted by the light-emitting structures.

12. The LED device of claim 1 , wherein the partition layer includes at least one of a substrate structure, an insulation structure, and a light reflecting structure.

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

a plurality of light-emitting cells spaced apart from each other;

a separation layer configured to isolate the light-emitting cells from each other;

a plurality of phosphor layers associated with separate, respective light-emitting cells of the plurality of light-emitting cells; and

a partition layer between the phosphor layers, such that the partition layer separates the phosphor layers from each other.

14. The LED device of claim 13 , wherein each light-emitting cell, of the plurality of light-emitting cells, includes,

a light-emitting structure configured to emit at least one of ultraviolet light and blue light, the light-emitting structure including,

a first conductive type semiconductor layer,

an active layer, and

a second conductive type semiconductor layer; and

an electrode layer that includes,

a first electrode layer electrically connected to the first conductive type semiconductor layer, and

a second electrode layer electrically connected to the second conductive type semiconductor layer.

15. The LED device of claim 13 , wherein the plurality of phosphor layers are further associated with different colors, respectively.

16. The LED device of claim 15 , wherein each phosphor layer of the plurality of phosphor layers includes at least two of a blue phosphor layer, a green phosphor layer, a red phosphor layer, and a white phosphor layer.

17. The LED device of claim 13 , wherein the partition layer includes at least one of a substrate structure, an insulation structure, and a light reflecting structure.

18. The LED device of claim 17 , wherein

the substrate structure includes a silicon-based substrate structure or an insulating substrate structure, and

the light reflecting structure includes a light-reflecting layer.

19. The LED device of claim 13 , wherein the separation layer and the partition layer are included in a common layer.

Priority Claims (1)
KR 10-2016-0023628 · Feb 26, 2016 · national
Continuity (2)
Continuation 15292332 · Oct 13, 2016
Related Publication 20180166425A1 · Jun 14, 2018
Cited By (3)
US 12,284,855 US 12,336,346 US 12,527,133