Lighting device and display apparatus

Patent metadata

Field	Value
Publication number	US-11038142-B2
Application number	US-201816210776-A
Country	US
Kind code	B2
Filing date	Dec 5, 2018
Priority date	Dec 15, 2017
Publication date	Jun 15, 2021
Grant date	Jun 15, 2021

Abstract

A lighting device includes a substrate having a light emitting area and a non-light emitting area surrounding the light emitting area, a light emitting part in the light emitting area, a first inorganic layer on the light emitting part and the non-light emitting area, a first organic layer on the first inorganic layer overlapping the light emitting part, a second inorganic layer on the first organic layer, a protruding part on the first inorganic layer of the non-light emitting area, and a cover layer on the protruding part.

First claim

What is claimed is:

1. A lighting device comprising:
a substrate having a light emitting area where a light emitting part is placed on and a non-light emitting area that does not emit light, the non-light emitting area surrounding the light emitting area;
a dam part on the substrate in the non-light emitting area, but not in the light emitting area, the dam part including a first dam and a second dam;
a first inorganic layer on both an upper surface of the light emitting part in the light emitting area and on an upper surface of the dam part in the non-light emitting area, the first inorganic layer being disposed on both an upper surface of the first dam and an upper surface of the second dam;
a first organic layer on the first inorganic layer, the first organic layer overlapping the light emitting part;
a second inorganic layer on the first organic layer;
a protruding part on the first inorganic layer in the non-light emitting area without the first inorganic layer being on an upper surface of the protruding part, but the protruding part not being in the light emitting area, wherein a height of the protruding part is greater than or equal to a height of the light emitting part; and
a cover layer on the protruding part,
wherein the first dam surrounds the light emitting part in a plan view, and the second dam is spaced apart from the first dam, and the second dam surrounds the first dam and the protruding part, and
wherein the protruding part is disposed between the first dam and the second dam at a side outside of the light emitting part, in the non-light emitting area, and
wherein both the first dam and the second dam are disposed between the substrate and the first inorganic layer.

2. The lighting device of claim 1 , wherein the light emitting part includes at least one organic light emitting diode.

3. The lighting device of claim 1 , wherein the dam part has a height greater than a height of the light emitting part.

4. The lighting device of claim 1 , wherein the first dam defines a disposition area of the first organic layer, wherein the first organic layer is disposed in the disposition area.

5. The lighting device of claim 1 , wherein the first inorganic layer and the second inorganic layer are in direct contact with each other in the non-light emitting area.

6. The lighting device of claim 1 , wherein the protruding part includes a polymer resin and a moisture absorbent dispersed in the polymer resin.

7. The lighting device of claim 1 , wherein the protruding part surrounds the light emitting part in a plan view.

8. The lighting device of claim 1 , wherein the protruding part is disposed on the second inorganic layer in the non-light emitting area.

9. The lighting device of claim 1 , further comprising:
an adhesive layer between the protruding part and the cover layer.

10. The lighting device of claim 9 , further comprising:
a primer layer between the protruding part and the adhesive layer.

11. A display apparatus comprising:
a substrate having a light emitting area where a display part is placed on and a non-light emitting area that does not emit light, the non-light emitting area surrounding the light emitting area;
a dam part on the substrate in the non-light emitting area, but not in the light emitting area, the dam part including a first dam and a second dam;
a first inorganic layer on both an upper surface of the display part in the light emitting area and an upper surface of the dam part in the non-light emitting area, the first inorganic layer being disposed on both an upper surface of the first dam and an upper surface of the second dam;
a first organic layer on the first inorganic layer, the first organic layer overlapping the display part;
a second inorganic layer on the first organic layer;
a protruding part on the first inorganic layer in the non-light emitting area without the first inorganic layer being on an upper surface of the protruding part, but the protruding part not being in the light emitting area, wherein a height of the protruding part is greater than or equal to a height of the display part; and
a cover layer on the protruding part,
wherein the display part includes a plurality of organic light emitting diodes,
wherein the first dam surrounds the display part in a plan view, and the second dam is spaced apart from the first dam, and the second dam surrounds the first dam and the protruding part, and
wherein the protruding part is disposed between the first dam and the second dam at a side outside of the light emitting area, in the non-light emitting area, and
wherein both the first dam and the second dam are disposed between the substrate and the first inorganic layer.

12. The display apparatus of claim 11 , further comprising:
an adhesive layer between the protruding part and the cover layer.

13. The display apparatus of claim 12 , further comprising:
a primer layer between the protruding part and the adhesive layer.

14. A lighting device comprising:
a substrate;
a light emitting part on the substrate, the light emitting part overlapping a portion of the substrate;
dam parts surrounding the light emitting part and not overlapping the light emitting part on the substrate, the dam parts including a first dam and a second dam;
an encapsulation layer on the light emitting part;
a first protruding part that surrounds the light emitting part and non-overlapping the light emitting part,
a second protruding part that surrounds the first protruding part and the light emitting part, the second protruding part non-overlapping with the first protruding part and the light emitting part,
wherein the first protruding part and the second protruding part has a height greater than or equal to a height of the light emitting part,
wherein the encapsulation layer comprises:
a first inorganic layer on the light emitting part,
a first organic layer on the first inorganic layer and overlapping the light emitting part, and
a second inorganic layer on the first organic layer and overlapping the light emitting part, and
wherein the first inorganic layer is disposed on both an upper surface of the light emitting part and an upper surface of the dam parts, and the first inorganic layer is disposed on both an upper surface of the first dam and an upper surface of the second dam, and
both the first protruding part and the second protruding part are disposed on the first inorganic layer without the first inorganic layer being on an upper surface of the first protruding part and without the first inorganic layer being on an upper surface of the second protruding part,

wherein the first dam surrounds the light emitting part in a plan view, and the second dam is spaced apart from the first dam, and the second dam surrounds the first dam, the first protruding part and the second protruding part, and
wherein the first protruding part and the second protruding part are disposed between the first dam and the second dam at a side outside of the light emitting part, in a non-light emitting area that does not emit light, and
wherein both the first dam and the second dam are disposed between the substrate and the first inorganic layer.

15. The lighting device of claim 14 , wherein each of the first dam and the second dam has a height greater than the height of the light emitting part.

16. The lighting device of claim 14 , further comprising a primer layer on the first protruding part and the second protruding part.

17. The lighting device of claim 14 , wherein both the first protruding part and the second protruding part are

Assignees

• Lg Display Co Ltd

Inventors

• Park Joonwon
• Kang Moochan
• Lee Kunyoung

Classifications

• H10K59/874

  including getter material or desiccant · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K50/8426

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• F21Y2115/15

  Organic light-emitting diodes [OLED] · CPC title