Light-emitting diode (LED) device

Patent metadata

Field	Value
Publication number	US-9905543-B2
Application number	US-201615292332-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Feb 26, 2016
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

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.

First claim

What is claimed is:

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 electrically insulate the light-emitting structures from each other;
a plurality of phosphor layers on second surfaces separate, respective light-emitting structures of the plurality of light-emitting structure, each phosphor layer configured to filter a different color of light from light emitted by the light-emitting structures; and
a partition layer between the phosphor layers, such that the partition layer separates the phosphor layers from each other, the partition layer including at least one of a substrate structure, an insulation structure, and a light reflecting structure.

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 the light-emitting structure, 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 phosphor layer, the second separating insulation layer extending from the first separating insulation layer, and
a second metal layer on the first sidewalls of the phosphor layer, 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. A light-emitting diode (LED) device, comprising:
a plurality of light-emitting cells spaced apart from each other;
a separation layer configured to electrically insulate 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, the plurality of phosphor layers further associated with different colors, respectively; and
a partition layer between the phosphor layers, such that the partition layer separates the phosphor layers from each other, the partition layer including at least one of a substrate structure, an insulation structure, and a light reflecting structure.

12. The LED device of claim 11 , 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.

13. The LED device of claim 11 , 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.

14. The LED device of claim 11 , 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.

15. The LED device of claim 11 , wherein the separation layer and the partition layer are included in a common layer.

16. An apparatus, comprising:
a plurality of light-emitting cells spaced apart from each other, each light-emitting cell including,
a light-emitting structure that includes a first surface and a second surface,
a set of one or more electrode layers on the first surface of the light-emitting structure, and
a phosphor layer on the second surface of the light-emitting structure, the phosphor layer associated with a particular color of light; and

a partition layer between separate, respective phosphor layers of the plurality of light-emitting cells, such that the partition layer at least partially defines the plurality of light-emitting cells.

17. The apparatus of claim 16 , wherein at least one light-emitting cell, of the plurality of light-emitting cells, includes an uneven structure on a surface of the light-emitting structure of the at least one light-emitting cell.

18. The apparatus of claim 16 , wherein at least one light-emitting cell, of the plurality of light-emitting cells, includes a reflective layer between a set of electrodes of the at least one light-emitting cell and a light-emitting structure of the at least one light-emitting cell.

19. The apparatus of claim 16 , wherein the partition layer includes one or more sidewalls associated with a slope, such that the one or more sidewalls define a space in a given light-emitting cell of the plurality of light-emitting cells, the space having a distal end and proximate end in relation to the light-emitting structure of the given light-emitting cell, the distal end having a greater diameter than the proximate end.

20. The apparatus of claim 16 , further comprising:
a light reflecting layer on at least one sidewall of the partition layer.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Yeon Ji Hye
• Lim Wan Tae
• Park Young Soo
• Kim Jung Sub
• Lee Jin Sub
• Yoo Ha Nul
• Noh Hye Seok

Classifications

• H10W90/00 Primary

  Package configurations · CPC title

• H01L33/60

  Electricity · mapped topic

• H01L33/50

  Electricity · mapped topic

• H01L33/504

  Electricity · mapped topic

• H01L25/0753 Primary

  Electricity · mapped topic