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

Patent metadata

Field	Value
Publication number	US-10103354-B2
Application number	US-201815933331-A
Country	US
Kind code	B2
Filing date	Mar 22, 2018
Priority date	Aug 31, 2014
Publication date	Oct 16, 2018
Grant date	Oct 16, 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. An organic-light emitting display (OLED) apparatus, comprising:
a base layer that is bent at a bend allowance section to achieve a first portion and a second portion bent behind the first portion;
an array of OLED pixel circuits on the first portion of the base layer;
an encapsulation over the array of pixel circuits;
a printed circuit film attached to the second portion of the base layer;
a plurality of wire traces providing electrical connections between the array of OLED pixel circuits and elements on the printed circuit film, the plurality of wire traces including a portion having a strain-reducing trace design that traverses the bend allowance section;
an organic coating layer disposed on the plurality of wire traces and over the bend allowance section of the base layer;
a first organic insulation layer between the portion of the plurality of wire traces and the base layer; and
a second organic insulation layer between the organic coating layer and the portion of the plurality of wire traces.

2. The organic-light emitting display (OLED) apparatus of claim 1 , wherein the organic coating layer has an uneven surface.

3. The organic-light emitting display (OLED) apparatus of claim 2 , wherein a thickness of at least a portion of the organic coating layer in the first portion is thicker than that of the organic coating layer in the second portion.

4. The organic-light emitting display (OLED) apparatus of claim 1 , wherein power voltages are transmitted to the array of OLED pixel circuits through at least one of the plurality of wire traces across the bend allowance section.

5. The organic-light emitting display (OLED) apparatus of claim 1 , further comprising a polarization layer on the encapsulation, wherein the organic coating layer is in contact with a sidewall of the polarization layer.

6. The organic-light emitting display (OLED) apparatus of claim 1 , further comprising a touch sensor layer having touch sensor electrodes on the encapsulation, wherein touch signals are transmitted to the touch sensor electrodes through at least one of the plurality of wire traces across the bend allowance section.

7. The organic-light emitting display (OLED) apparatus of claim 1 , the plurality of wire traces have a multi-layered structure.

8. The organic-light emitting display (OLED) apparatus of claim 1 , the base layer includes a routing area between the encapsulation and the bend allowance section, the routing area having a curved shape notched line.

9. An organic-light emitting display (OLED) apparatus, comprising:
a base layer that is bent at a bend allowance section to achieve a first portion and a second portion bent behind the first portion;
a driving circuit on the first portion of the base layer;
an encapsulation over the driving circuit;
a plurality of wire traces connected to the driving circuit, the plurality of wire traces including a portion having a strain-reducing trace design that traverses the bend allowance section;
an organic coating layer disposed on the plurality of wire traces and over the bend allowance section of the base layer;
a first organic insulation layer between the portion of the plurality of wire traces and the base layer; and
a second organic insulation layer between the organic coating layer and the portion of the plurality of wire traces.

10. The organic-light emitting display (OLED) apparatus of claim 9 , wherein the driving circuit is a gate-in-panel type driver, the driving circuit receiving power voltages through at least one of the plurality of wire traces.

11. The organic-light emitting display (OLED) apparatus of claim 9 , wherein the organic coating layer has an uneven surface.

12. The organic-light emitting display (OLED) apparatus of claim 11 , wherein a thickness of at least a portion of the organic coating layer in the first portion is thicker than that of the organic coating layer in the second portion.

13. The organic-light emitting display (OLED) apparatus of claim 9 , further comprising a polarization layer on the encapsulation, wherein the organic coating layer is in contact with a sidewall of the polarization layer.

14. The organic-light emitting display (OLED) apparatus of claim 9 , further comprising a touch sensor layer having touch sensor electrodes on the encapsulation, wherein touch signals are transmitted to the touch sensor electrodes through at least one of the plurality of wire traces across the bend allowance section.

15. The organic-light emitting display (OLED) apparatus of claim 9 , the plurality of wire traces have a multi-layered structure.

16. The organic-light emitting display (OLED) apparatus of claim 9 , the base layer includes a routing area between the encapsulation and the bend allowance section, the routing area having a curved shape notched line.

17. An organic-light emitting display (OLED) apparatus, comprising:
a base layer that is bent at a bend allowance section to achieve a first portion and a second portion bent behind the first portion;
an array of OLED pixel circuits on the first portion of the base layer;
a plurality of wire traces connected to the array of OLED pixel circuits, the plurality of wire traces including a portion having a strain-reducing trace design so as to reduce bending stress in the bend allowance section;
an organic coating layer disposed on the plurality of wire traces and over the bend allowance section of the base layer so as to provide protection against moistures and other materials;
a first organic insulation layer between the portion of the plurality of wire traces and the base layer; and
a second organic insulation layer between the organic coating layer and the portion of the plurality of wire traces.

18. The organic-light emitting display (OLED) apparatus of claim 17 , wherein the organic coating layer has an uneven surface.

19. The organic-light emitting display (OLED) apparatus of claim 18 , wherein a thickness of at least a portion of the organic coating layer in the first portion is thicker than that of the organic coating layer in the second portion.

20. The organic-light emitting display (OLED) apparatus of claim 17 , wherein power voltages are transmitted to the array of OLED pixel circuits through at least one of the plurality of wire traces across the bend allowance section.

Assignees

• Lg Display Co Ltd

Inventors

• Son Haejoon
• Ryu Joungho
• Choi Siehyug

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H01L51/0097

  Electricity · mapped topic

• H01L27/3262

  Electricity · mapped topic

• H01L27/3288

  Electricity · mapped topic

• H01L2251/5338

  Electricity · mapped topic