Display device with micro cover layer and manufacturing method for the same

Patent metadata

Field	Value
Publication number	US-10121991-B2
Application number	US-201815934852-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Aug 31, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

There is provided a flexible display having a plurality of innovations configured to allow bending of a portion or portions to reduce apparent border size and/or utilize the side surface of an assembled flexible display.

First claim

What is claimed is:

1. A display apparatus, comprising:
a base layer having a bend allowance section between a first portion and a second portion of the display apparatus;
a buffer layer on the base layer, and the bend allowance section has an etched buffer layer part so as to facilitate easier bending of the bend allowance section;
an organic light-emitting diode (OLED) element on the buffer layer;
a wire trace having a strain-reducing trace design across the bend allowance section between the first portion and the second portion; and
an organic-coating layer on the wire trace and over the bend allowance section.

2. The display apparatus of claim 1 , wherein the organic-coating layer locates on the base layer of the bend allowance section without the buffer layer at the etched buffer layer part.

3. The display apparatus of claim 2 , further comprising a cover on the first portion of the base layer, extending into the bend allowance section.

4. The display apparatus of claim 2 , wherein the first portion has an active area and a first routing area, and the second portion has a second routing area and a pad area.

5. The display apparatus of claim 4 , wherein the wire trace across the bend allowance section between the first routing area and the second routing area.

6. The display apparatus of claim 5 , wherein the organic-coating layer locates on the first routing area and the second routing area.

7. The display apparatus of claim 6 , wherein the organic-coating layer has a thicker profile in the first routing area than the second routing area.

8. The display apparatus of claim 6 , wherein the organic-coating layer has an uneven surface.

9. The display apparatus of claim 2 , wherein the organic light-emitting diode comprises a gate electrode, a source electrode, a drain electrode, a semiconductor layer, a first electrode and a second electrode and an organic light emitting layer between the first electrode and the second electrode.

10. The display apparatus of claim 9 , wherein the semiconductor layer is directly on the buffer layer at the first portion.

11. A display apparatus, comprising:
a base layer having a bend allowance section between a first portion and a second portion of the display apparatus, the first portion having an active area and a first routing area, and the second portion having a second routing area and a pad area;
a buffer layer on the base layer, and the bend allowance section has an etched buffer layer part so as to facilitate easier bending of the bend allowance section;
an organic light-emitting diode (OLED) element on the buffer layer;
a plurality of wire traces having a strain-reducing trace design across the bend allowance section between the first routing area and the second routing area, and the plurality of wire traces merged to a reinforced portion in an abridged area; and
an organic-coating layer on the plurality of wire traces and over the bend allowance section.

12. The display apparatus of claim 11 , wherein the organic-coating layer locates on the base layer of the bend allowance section without the buffer layer at the etched buffer layer part.

13. The display apparatus of claim 12 , wherein the buffer layer on the active area of the base layer includes multiple stacks of a SiNx layer and a SiO2 layer.

14. The display apparatus of claim 12 , wherein the abridged area locates near a bent spot where the base layer being bent.

15. The display apparatus of claim 14 , wherein the bent spot positioned at or just outside start of the bend allowance section.

16. The display apparatus of claim 12 , wherein the reinforced portion has a width wider than a width of the plurality of wire traces having a strain-reducing trace design.

17. A display apparatus, comprising:
a base layer having a bend allowance section between a first portion and a second portion of the display apparatus, the first portion having an active area and a first routing area, and the second portion having a second routing area and a pad area;
a buffer layer on the base layer, and the bend allowance section has an etched buffer layer part so as to facilitate easier bending of the bend allowance section;
an organic light-emitting diode (OLED) element on the buffer layer;
a plurality of wire traces having a strain-reducing trace design across the bend allowance section between the first routing area and the second routing area, and the plurality of wire traces merged to a reinforced portion in an abridged area to make the plurality of wire traces harder to hold out against bending stress when the bend allowance section being bent; and
an organic-coating layer on the wire trace and over the bend allowance section of the base layer to protect against moistures and other foreign materials.

18. The display apparatus of claim 17 , wherein the organic-coating layer locates on the base layer of the bend allowance section without the buffer layer at the etched buffer layer part.

19. The display apparatus of claim 18 , wherein the wire trace having a strain-reducing trace provides increased protection to the wire trace against the bending stress.

20. The display apparatus of claim 18 , wherein the abridged area locates near a bent spot at or just outside start of the bend allowance section.

21. The display apparatus of claim 18 , wherein the reinforced portion has a width wider than a width of the plurality of wire traces having a strain-reducing trace design.

Assignees

• Lg Display Co Ltd

Inventors

• Son Haejoon
• Ryu Joungho
• Choi Siehyug

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/5281

  Electricity · mapped topic

• H01L27/323

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic