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

Patent metadata

Field	Value
Publication number	US-9768415-B2
Application number	US-201615174685-A
Country	US
Kind code	B2
Filing date	Jun 6, 2016
Priority date	Aug 31, 2014
Publication date	Sep 19, 2017
Grant date	Sep 19, 2017

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 plurality of organic light-emitting diode (OLED) elements disposed on the first portion of the base layer;
a plurality of wire traces having a strain-reducing trace design across the bend allowance section between the first portion and the second portion; and
a micro-coating layer disposed on the plurality of wire traces and over the bend allowance section of the base layer.

2. The display apparatus of claim 1 , further comprising an encapsulation over the OLED elements.

3. The display apparatus of claim 2 , further comprising a printed circuit film attached to the second portion of the base layer.

4. The display apparatus of claim 2 , further comprising a polarization layer on the encapsulation positioned to expose at least a part of an upper surface of the encapsulation, wherein the micro-coating layer is arranged to cover at least a part of the upper surface of the encapsulation between an edge of polarization layer and an edge of the encapsulation.

5. The display apparatus of claim 2 , wherein the micro-coating layer covering the upper surface of the encapsulation is in contact with the sidewall of the polarization layer.

6. The display apparatus of claim 4 , wherein the micro-coating layer covering the upper surface of the encapsulation includes a portion that is in contact with the sidewall of the polarization layer and a portion that is spaced apart from the side wall of the polarization layer.

7. The display apparatus of claim 3 , wherein the micro-coating layer is arranged to cover a part of the printed circuit film attached on the second portion of the display apparatus.

8. The display apparatus of claim 1 , further comprising:
a buffer layer under the plurality of wire traces routed between the first portion and the second portion of the display apparatus; and
a passivation layer on the plurality of wire traces routed between the first portion and the second portion of the display apparatus, wherein the plurality of wire traces has a strain-reducing trace design in the bend allowance section, and wherein the buffer layer and the passivation layer in the bend allowance section has a pattern corresponding to the strain-reducing trace design of the wire traces in the bend allowance section.

9. The display apparatus of claim 1 , wherein each of the first portion, the second portion and the bend allowance section includes a buffer layer etched area between a notched line and a closest conductive line trace to the notched line.

10. The display apparatus of claim 2 , further comprising a first support film attached on an inner surface of the first portion of the base layer and a second support film attached on an inner surface of the second portion of the base layer, wherein the first support film and the encapsulation are arranged such that the first support film is extended further out toward the bend portion of the base layer than the encapsulation.

11. The display apparatus of claim 1 , wherein the micro-coating layer is formed of a photo-curable material.

12. The display apparatus of claim 3 , wherein the micro-coating layer has a thicker profile in a first routing area between the encapsulation and the bend allowance section than a second routing area between the printed circuit film and the bend allowance section.

13. The display apparatus of claim 3 , wherein a width of the upper surface of the encapsulation that is covered by the micro-coating layer is greater than a width of the printed circuit film that is covered by the micro-coating layer.

14. The display apparatus of claim 3 , wherein a height of the micro-coating layer on the upper surface of the encapsulation is lesser than a height of the micro-coating layer on the printed circuit film.

15. The display apparatus of claim 1 , wherein the plurality of wire traces are split into multiple sub-traces to form a chain of diamonds shapes.

16. The display apparatus of claim 1 , wherein the strain-reducing trace design has a reinforced conductive line portion at or near the first portion of the display apparatus.

Assignees

• Lg Display Co Ltd

Inventors

• Son Haejoon
• Ryu Joungho
• Choi Siehyug

Classifications

• Y02E10/549

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• H10K59/1213

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• H01L51/5253 Primary

  Electricity · mapped topic

• H01L51/0097

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic