Display device using semiconductor light emitting device

Patent metadata

Field	Value
Publication number	US-9423832-B2
Application number	US-201514638930-A
Country	US
Kind code	B2
Filing date	Mar 4, 2015
Priority date	Mar 5, 2014
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A display device including a wiring substrate having a first substrate layer and a second substrate layer, a conductive adhesive layer configured to cover the wiring substrate, a plurality of semiconductor light emitting devices coupled to the conductive adhesive layer and electrically connected to a first electrode and a second electrode. Further, the first electrode is disposed on the first substrate layer, and the second substrate layer has one surface facing the conductive adhesive layer and the other surface covering the first electrode, and an auxiliary electrode electrically connected to the first electrode and the second electrode are disposed on one surface of the second substrate layer.

First claim

What is claimed is:

1. A display device, comprising:
a wiring substrate disposed with an electrode having a plurality of electrode lines;
a conductive adhesive layer connected to the wiring substrate;
a plurality of semiconductor light emitting devices coupled to the conductive adhesive layer, and electrically connected to the electrode; and
a phosphor portion configured to convert light emitted from at least some of the plurality of semiconductor light emitting devices into a sub-pixel color so as to form a plurality of columns along the plurality of electrode lines,
wherein the phosphor portion comprises:
first phosphor portions covering one surface of said at least some of the semiconductor light emitting devices, respectively, sequentially disposed along the plurality of columns among the plurality of semiconductor light emitting devices; and
second phosphor portions disposed between the first phosphor portions, and having a different shape from a shape of the first phosphor portions,
wherein the phosphor portion includes a first color phosphor portion and a second color phosphor portion disposed in parallel to each other, and
wherein the phosphor portion covers at least part of a black matrix disposed between the first and the second phosphor portion.

2. The display device of claim 1 , wherein the second phosphor portions have at least one side inclined with respect to one side of the first phosphor portions.

3. The display device of claim 2 , wherein the at least one side of the second phosphor portions includes a concave portion concaving toward a center by the inclination.

4. The display device of claim 3 , wherein the phosphor portion includes cured portions cured by light emitted from said at least some of the plurality of semiconductor light emitting devices, and
wherein an extent of the inclination of the at least one side is based on a property of the emitted light during the curing.

5. The display device of claim 4 , wherein the property of light comprises at least one of a light emission time, a light emission intensity, a light emission area and a light emission range of the emitted light.

6. The display device of claim 1 , wherein each of the second phosphor portions comprises:
a central region; and
edge regions formed at both sides of the central region,
wherein an area of a phosphor material covering the conductive adhesive layer is larger than that of the central region.

7. The display device of claim 6 , wherein the phosphor material include discontinuous portions in at least part of the central region of the second phosphor portions.

8. The display device of claim 7 , wherein the second phosphor portions include a separation space in a central region of the second phosphor portions by the discontinuity.

9. The display device of claim 1 , wherein one surface of the first phosphor portions covers said at least some of the semiconductor light emitting devices, and
wherein at least part of the other surface of the first phosphor portion includes a curved surface.

10. The display device of claim 9 , wherein a curvature radius of the curved surface is determined based on a distance to a light emission portion of said at least some of the semiconductor light emitting devices.

11. The display device of claim 10 , wherein the first and the second phosphor portions comprise a cured phosphor material cured by light emitted from said at least some of the semiconductor light emitting devices, respectively.

12. The display device of claim 11 , wherein the cured phosphor material cured is thicker in the first phosphor portions.

13. The display device of claim 1 , wherein at least some of the first phosphor portions have a dome shape being higher than that of the corresponding second phosphor portions.

Assignees

• Lg Electronics Inc

Inventors

• Jeoung Byungwoo
• Kim Chisun
• Kang Yongdae
• Rhee Byungjoon
• Bang Kyuhyun

Classifications

• H10W90/00

  Package configurations · CPC title

• H10W72/0198

  batch processes · CPC title

• H10H20/8513

  having two or more wavelength conversion materials · CPC title

• H10H20/0361

  of wavelength conversion means · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title