Foldable display device

Patent metadata

Field	Value
Publication number	US-10509498-B2
Application number	US-201715798583-A
Country	US
Kind code	B2
Filing date	Oct 31, 2017
Priority date	Oct 31, 2016
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A foldable display device may prevent defects in touch sensing, caused by stress concentrated at a folding part. A foldable display device may include a lower base material and an upper base material, each base material including at least one folding part and non-folding parts in a display area; a thin film transistor array on the lower base material; an organic light emitting array on the thin film transistor array; a touch electrode array disposed on the upper base material, and oppositely bonded to the organic light emitting array disposed opposite to the touch electrode array by an adhesive layer; and a plurality of wirings having a zigzag shape and uneven depth level in the folding part on the upper base material.

First claim

What is claimed is:

1. A foldable display device comprising:
a lower base material and an upper base material, each base material including at least one folding part and non-folding parts in a display area;
a thin film transistor array on the lower base material;
an organic light emitting array on the thin film transistor array;
a touch electrode array disposed on the upper base material, and oppositely bonded to the organic light emitting array by an adhesive layer; and
a plurality of wirings having a zigzag shape and uneven depth level in the folding part on the upper base material,
wherein the touch electrode array includes a plurality of grooves overlapping the plurality of wirings in the folding part, and
wherein the wirings pass under the grooves and include first irregular parts that are uneven in a region corresponding to the grooves.

2. The foldable display device according to claim 1 , wherein:
the touch electrode array includes a plurality of touch electrodes; and
the grooves are in a non-display area outside the display area, and the wirings are a plurality of routing lines provided to the touch electrode array to supply a plurality of signals.

3. The foldable display device according to claim 1 , wherein the grooves are provided by patterning the upper base material.

4. The foldable display device according to claim 1 , further comprising:
an upper buffer layer between the upper base material and the touch electrode array,
wherein the touch electrode array includes a plurality of touch electrodes on the upper buffer layer, and at least one interlayer insulating film on the touch electrodes.

5. The foldable display device according to claim 4 , wherein the grooves are provided by patterning at least one of the upper base material and the upper buffer layer.

6. The foldable display device according to claim 1 , wherein a major axis of each of the grooves is in a horizontal direction.

7. The foldable display device according to claim 6 , wherein the grooves are extended from one side edge of the at least one the folding part to another side edge of the at least one folding part across the display area.

8. The foldable display device according to claim 7 , wherein the touch electrode array includes a plurality of touch electrodes in the display area which include second irregular parts located in regions overlapping the grooves.

9. A foldable display device comprising:
a lower base material and an upper base material, each base material including at least one folding part and non-folding parts;
a thin film transistor array located on the lower base material;
an organic light emitting array located on the thin film transistor array; and
a touch electrode array located on one surface of the upper base material, oppositely bonded to the organic light emitting array by an adhesive layer,
wherein the touch electrode array is provided with a plurality of wirings having a zigzag shape and uneven depth level in at least the folding part,
wherein the touch electrode array includes a plurality of grooves overlapping the plurality of wirings in at least the folding part,
wherein each of the grooves overlaps at least a part of only one wiring along a width direction of the wiring, and
wherein the wirings include uneven parts being uneven which overlap the grooves.

10. The foldable display device according to claim 9 , wherein each groove overlaps at least a part of only one wiring at a bending region of the wiring.

11. The foldable display device according to claim 9 , wherein:
a width of each groove is greater than a width of the wiring which the groove overlaps, and
the overlapped part of the wiring is located at a bottom of the groove.

12. The foldable display device according to claim 9 , wherein a width of each groove is smaller than a width of the wiring which the groove overlaps.

Assignees

• Lg Display Co Ltd

Inventors

• Moon Young-Gyu
• Han Jong-Hyun

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• G06F2203/04111

  Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate · CPC title

• G06F2203/04112

  Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material · CPC title

• G06F2203/04102

  Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title