Display device

Patent metadata

Field	Value
Publication number	US-10490610-B2
Application number	US-201715660764-A
Country	US
Kind code	B2
Filing date	Jul 26, 2017
Priority date	Dec 28, 2016
Publication date	Nov 26, 2019
Grant date	Nov 26, 2019

Abstract

A thin and lightweight display device is disclosed. An organic light-emitting display device having a touch sensor is configured such that a color filter array, which is disposed between an encapsulation unit and the touch sensor, extends to a pad area to contact the touch pad, thereby reducing stress on the pad area, and such that touch electrodes are disposed on the encapsulation unit, with the result that an additional bonding process is not required, whereby the process is simplified and cost is reduced.

First claim

What is claimed is:

1. A display device comprising:
a light-emitting element disposed on an active area of a substrate;
an encapsulation unit disposed on the light-emitting element;
a touch sensor disposed on the encapsulation unit;
a color filter array disposed between the encapsulation unit and the touch sensor, wherein the color filter array comprises:
a color filter disposed on the encapsulation unit and a black matrix, and
wherein the black matrix is disposed on the encapsulation unit;
a touch pad electrically connected to the touch sensor and disposed on a pad area of the substrate, wherein the touch pad comprises:
a pad electrode disposed on at least one layer of dielectric film on the substrate; and
a pad cover electrode connected to the pad electrode and a routing line, and wherein
the pad cover electrode is connected to the pad electrode exposed through a pad contact hole formed through the color filter array disposed between the pad electrode and the pad cover electrode;
a dam disposed between the pad area and the active area; and
the routing line disposed to cross over the dam and overlapping the black matrix included in the color filter array, wherein the routing line is disposed to electrically connect the touch pad and the touch sensor.

2. The display device according to claim 1 , further comprising at least one layer of dielectric film disposed between the substrate and the encapsulation unit.

3. The display device according to claim 1 , wherein the touch pad is disposed to contact the color filter array.

4. The display device according to claim 1 , wherein the color filter array further comprises a planarization layer disposed on the encapsulation unit.

5. The display device according to claim 4 , wherein the routing line is disposed to cover at least one of the color filter and the planarization layer, and to contact at least one of the color filter and the planarization layer.

6. The display device according to claim 5 , wherein the routing line is disposed to electrically connect the touch pad and the touch sensor to contact at least one of the color filter and the planarization layer.

7. The display device according to claim 1 , wherein the pad contact hole is formed through at least one of the color filter and a planarization layer disposed between the pad electrode and the pad cover electrode.

8. The display device according to claim 1 , wherein the pad cover electrode contacts at least one of the color filter and the pad electrode contacts the at least one layer of dielectric film.

9. The display device according to claim 1 , wherein the encapsulation unit comprises a plurality of inorganic encapsulation layers and at least one organic encapsulation layer disposed between the inorganic encapsulation layers.

10. The display device according to claim 9 , wherein the pad contact hole is formed through at least one of the inorganic encapsulation layers disposed between the pad electrode and the pad cover electrode and through at least one of the color filter and a planarization layer.

11. The display device according to claim 9 , wherein
at least one of the color filter and a planarization layer extends from the active area to the pad area.

12. The display device according to claim 11 , wherein one of the color filter and the planarization layer extends from the active area to an area between the dam and the touch pad, and
wherein other one of the color filter and the planarization layer extends from the active area to the pad area.

13. The display device according to claim 11 , wherein the routing line is disposed above the dam in a state in which the color filter array is disposed between the routing line and the dam.

14. The display device according to claim 1 , wherein the touch sensor comprises:
touch-driving lines arranged on the color filter array in a first direction; and
touch-sensing lines arranged on the color filter array in a second direction, which intersects the first direction.

15. The display device according to claim 14 , wherein the touch-driving lines and the touch-sensing lines are formed in a mesh shape.

16. The display device according to claim 14 ,
wherein each of the touch-driving lines includes first touch electrodes and first bridges for interconnecting the first touch electrodes,
wherein each of the touch-sensing lines includes second touch electrodes and second bridges for interconnecting the second touch electrodes,
wherein the touch sensor further comprises a dielectric film disposed between the first and second touch electrodes, and
wherein at least one of the first and second bridges comprises at least one slit.

17. The display device according to claim 16 , wherein the first and second touch electrodes and the first bridges are formed to have a three-layer stack structure by using at least one conductive layer selected from among Ti, Al, Mo, MoTi, Cu, and Ta.

18. The display device according to claim 16 , wherein the second bridges include at least one slit and overlap a bank formed on an anode of the light-emitting element.

19. The display device according to claim 1 , further comprising:
a transistor connected to the light-emitting element;
a first dielectric film disposed under an active layer of the transistor;
a second dielectric film disposed between a gate electrode of the transistor and the active layer; and
a third dielectric film disposed between the gate electrode and source and drain electrodes; and
a fourth dielectric film disposed between the source electrode and the drain electrode and the light-emitting element, wherein
at least one layer of dielectric film is at least one of the first to fourth dielectric films.

20. A display device comprising:
a light-emitting element disposed on a substrate;
an encapsulation unit disposed on the light-emitting element;
a touch sensor disposed on the encapsulation unit;
a black matrix disposed on the encapsulation unit;
a routing line overlapping the black matrix;
a color filter disposed between the encapsulation unit and the touch sensor and extending to a pad area on the substrate, wherein the color filter is disposed on the encapsulation unit and the black matrix; and
a touch pad electrically connected to the touch sensor, wherein the touch pad comprises:
a pad electrode disposed on at least one layer of dielectric film on the substrate; and
a pad cover electrode connected to the pad electrode and the routing line, and wherein the pad cover electrode is connected to the pad electrode exposed through a pad contact hole formed through the color filter array disposed between the pad electrode and the pad cover electrode, and

wherein the routing line is disposed to electrically connect the touch pad and the touch sensor.

21. The display device of claim 20 , wherein the light-emitting element is formed in an active area, the touch pad is formed in the pad area, and a dam is formed between the active area and the pad area.

Assignees

• Lg Display Co Ltd

Inventors

• Kim Jong-Sung

Classifications

• G06F3/0416

  Control or interface arrangements specially adapted for digitisers · 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

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title