Organic light emitting diode display device including touch sensor and manufacturing method of same

Patent metadata

Field	Value
Publication number	US-11899863-B2
Application number	US-202017116595-A
Country	US
Kind code	B2
Filing date	Dec 9, 2020
Priority date	Dec 31, 2019
Publication date	Feb 13, 2024
Grant date	Feb 13, 2024

Abstract

An organic light emitting diode display device including a touch sensor and a manufacturing method of the same are discussed. The display device includes a substrate having light emitting areas defined therein; light emitting elements provided on the light emitting areas on the substrate; a first encapsulation film covering the light emitting elements; color filters provided on the first encapsulation film to respectively correspond to the light emitting areas; bridge electrodes provided between the plurality of color filters on the first encapsulation film; a bank insulating film provided on the first encapsulation film to cover the bridge electrodes and surround the color filters; touch electrodes provided by being overlapped with the bridge electrodes on the bank insulating film; and a planarization film covering the color filters and the bank insulating film and exposing the touch electrodes.

First claim

What is claimed is:

1. An organic light emitting diode display device including a touch sensor, the organic light emitting diode display device comprising:
a substrate having a plurality of light emitting areas defined therein;
a plurality of light emitting elements provided on the plurality of light emitting areas on the substrate;
a first encapsulation film covering the plurality of light emitting elements;
a plurality of color filters provided on the first encapsulation film to respectively correspond to the plurality of light emitting areas;
a plurality of bridge electrodes provided between the plurality of color filters on the first encapsulation film;
a bank insulating film provided on the first encapsulation film to cover the plurality of bridge electrodes and surround the plurality of color filters;
a plurality of touch electrodes provided by being overlapped with the plurality of bridge electrodes on the bank insulating film;
a planarization film covering the plurality of color filters and the bank insulating film and exposing the plurality of touch electrodes; and
a contact penetrating the bank insulating film and connecting a touch electrode and a bridge electrode vertically overlapped with each other among the plurality of touch electrodes and bridge electrodes,
wherein at least one of the plurality of touch electrodes is connected to a touch line provided along a side surface of the planarization film,
wherein the bank insulating film includes a plurality of trenches exposing a portion of an upper surface of the first encapsulation film, corresponding to the plurality of light emitting areas,
wherein the plurality of color filters are disposed in the plurality of trenches,
wherein the plurality of trenches and the plurality of bridge electrodes and the plurality of color filters are disposed on a same plane,
wherein a lowermost surface of each of the plurality of bridge electrodes directly contacts an uppermost surface of the first encapsulation film, a lowermost surface of the bank insulating film directly contacts the uppermost surface of the first encapsulation film, and a lowermost surface of each of the plurality of color filters directly contacts the uppermost surface of the first encapsulation film,
wherein the plurality of bridge electrodes are disposed between the plurality of touch electrodes and the first encapsulation film, each of the plurality of bridge electrodes is disposed under a concave portion of a corresponding touch electrode among the plurality of touch electrodes and directly contacts a lower surface of the concave portion, and a point of contact between the concave portion of the corresponding touch electrode and a corresponding bridge electrode among the plurality of bridge electrodes is disposed in a corresponding trench in the bank insulating film between two adjacent color filters among the plurality of color filters, and
wherein the bridge electrode and the touch electrode vertically overlapped with the bridge electrode and connected to the bridge electrode through the contact do not vertically overlap the plurality of the light emitting areas.

2. The organic light emitting diode display device of claim 1 , wherein the contact and the touch electrode are integrally provided.

3. The organic light emitting diode display device of claim 1 , wherein at least a part of the touch electrode protrudes onto the planarization film.

4. The organic light emitting diode display device of claim 1 , wherein the part of the touch electrode is extended onto the planarization film so as to be vertically overlapped with the color filter.

5. The organic light emitting diode display device of claim 1 , wherein the color filter and a part of the bridge electrode are in contact with each other.

6. The organic light emitting diode display device of claim 1 , wherein the first encapsulation film includes:
a first inorganic film,
an organic film, and
a second inorganic film sequentially provided on the plurality of light emitting elements.

7. The organic light emitting diode display device of claim 1 , wherein the concave portion of the corresponding touch electrode includes a stepped portion overlapping with one of the plurality of bridge electrodes, and
wherein the concave portion of the corresponding touch electrode includes an upper inclined surface portion contacting an inclined surface of the planarization film, and a lower inclined surface portion contacting an inclined surface of the bank insulating film.

8. The organic light emitting diode display device of claim 1 , wherein the point of contact between the concave portion of the corresponding touch electrode and the corresponding bridge electrode is located between an upper surface of the first encapsulation layer and an upper surface of the bank insulating film.

9. The organic light emitting diode display device of claim 8 , wherein the point of contact between the concave portion of the corresponding touch electrode and the corresponding bridge electrode is located closer to the upper surface of the first encapsulation layer than the upper surface of the bank insulating film.

10. The organic light emitting diode display device of claim 1 , wherein the concave portion of the corresponding touch electrode is disposed in a first hole of the planarization film and a second hole in the bank insulating film, and
wherein the first hole of the planarization film is wider than the second hole in the bank insulating film.

11. The organic light emitting diode display device of claim 1 , wherein the bridge electrode and the touch electrode vertically overlapped with the bridge electrode and connected to the bridge electrode through the contact are both disposed between the plurality of color filters on the first encapsulation film such that the bridge electrode and the touch electrode function as a black matrix.

12. A manufacturing method of an organic light emitting diode display device including a touch sensor, the manufacturing method comprising:
providing a plurality of light emitting elements in a plurality of light emitting areas on a substrate;
providing a first encapsulation film covering the plurality of light emitting elements;
providing a bridge electrode on the first encapsulation film;
providing a bank insulating film on the first encapsulation film, the bank insulating film exposing a part of the bridge electrode;
providing a plurality of color filters each on the first encapsulation film;
providing a planarization film to cover the plurality of color filters and the bank insulating film;
providing a touch electrode on the bank insulating film to be vertically overlapped with the bridge electrode; and
providing a second encapsulation film covering the touch electrode and the planarization film,
wherein the providing of the touch electrode includes providing a touch line together along a side surface of the planarization film,
wherein the providing of the bank insulating film on the first encapsulation film includes providing a plurality of trenches exposing a portion of an upper surface of the first encapsulation film, corresponding to the plurality of light emitting areas,
wherein the plurality of color filters are formed by filling the plurality of trenches with a pigment in an inkjet method and curing the pigment,
wherein a lowermost surface of each of the plurality of bridge electrodes directly contacts an uppermost surface of the first encapsulation film, a lowermost surface of the bank insulating film directly contacts the uppermost surface of the first encapsulation film, and a lowermost surface of each of the plurality of color filters directly contacts

Assignees

• Lg Display Co Ltd

Inventors

• Lee Jihun
• Kim Chulho
• Kim Namkook
• Lee Jungeun
• Choi Sungwoo
• Lee Hwankeon
• Moon Youngkyun

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8731

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · 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

• G06F2203/04103

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

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title