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

Patent metadata

Field	Value
Publication number	US-9385175-B2
Application number	US-201514945371-A
Country	US
Kind code	B2
Filing date	Nov 18, 2015
Priority date	Aug 31, 2014
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

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 base layer;
a plurality of thin-film transistors provided on the base layer, said plurality of thin-film transistors implementing a plurality of pixel circuits and a driving circuit;
a plurality of organic light-emitting diode (OLED) elements disposed on the first portion of the base layer, each of the plurality of OLED elements being connected to corresponding ones of the pixel circuits;
an encapsulation over the OLED elements;
a printed circuit film attached to the second portion of the base layer; and
a micro-coating layer disposed over the bend allowance section of the base layer, wherein the plurality of thin-film transistors includes at least one low-temperature poly-silicon (LTPS) thin-film transistor (TFT) and at least one oxide TFT.

2. The display apparatus of claim 1 , wherein said plurality of pixel circuits includes the oxide TFT and said driving circuit includes the LTPS TFT.

3. The display apparatus of claim 1 , wherein said driving circuit includes a combination of an N-Type LTPS TFT and a P-Type LTPS TFT, and said plurality of pixel circuits includes the oxide TFT.

4. The display apparatus of claim 1 , wherein said driving circuit includes both the LTPS TFT and the oxide TFT.

5. The display apparatus of claim 1 , wherein each of the pixel circuits includes both the LTPS TFT and the oxide TFT.

6. The display apparatus of claim 5 , wherein each of the pixel circuits includes a storage capacitor and the oxide TFT connected to the storage capacitor.

7. The display apparatus of claim 1 , wherein the driving circuit is a gate driver for providing gate signals to the plurality of pixel circuits.

8. The display apparatus of claim 1 , wherein the driving circuit is provided on the second portion of the base layer.

9. The display apparatus of claim 8 , wherein the driving circuit is a data driver for providing data signals to the plurality of pixel circuits.

10. The display apparatus of claim 8 , further comprising a plurality of wire traces routed between the plurality of pixel circuits in the first portion of the base layer and the driving circuit in the second portion of the base layer, wherein the plurality of wire traces has a strain-reducing trace design in the bend allowance section.

11. The display apparatus of claim 10 , wherein the strain-reducing trace design of the plurality of wire traces is one of a sign-wave, a square-wave, a serpentine, a saw-toothed, a slanted line, a diamond chain trace and a diamond web trace designs.

12. The display apparatus of claim 10 , wherein the plurality of wire traces having the strain-reducing trace design includes a first wire trace and a second wire trace, each having a convex portion and a concave portion, wherein the convex portion of the first wire trace is positioned adjacent to the concave portion of the second wire trace.

13. The display apparatus of claim 1 , further comprising a touch sensor layer provided with a plurality of touch sensor electrodes configured to measure electrical changes on one or more touch sensor electrodes upon a touch input made on the display apparatus.

14. The display apparatus of claim 13 , further comprising a deformable material, wherein the display apparatus is configured to measure electrical changes on at least one electrode upon deformation of the deformable material by the touch input.

15. The display apparatus of claim 1 , wherein at least some of the plurality of OLED elements are also provided in the bend allowance section of the base layer.

16. The display apparatus of claim 1 , further comprising a plurality of OLED elements on the second portion of the base layer.

17. The display apparatus of claim 1 , wherein the first portion of the base layer is curved-in or curved-out to provide a concave or a convex display area in the first portion of the base layer.

Assignees

• Lg Display Co Ltd

Inventors

• Son Haejoon
• Ryu Joungho
• Choi Siehyug

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K59/1213

  the pixel elements being TFTs · CPC title

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title

• H10K50/844

  Encapsulations · CPC title