ORGANIC LIGHT-EMITTING DISPLAY DEVICE HAVING TOUCH SENSOR

• US 20190326360A1
• Filed: 04/18/2019
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: GWON, Hyang-Myoung, JUNG, Ji-Hyun, LEE, Deuk-Su, AN, Su-Chang, LEE, Jae-Gyun, RHE, Ru-Da, LEE, Yang-Sik
• Granted Patent: US 11,114,510 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers
• CPC Class Codes: H10K 77/111 Flexible substrates
• CPC Class Codes: Y02E 10/549 Organic PV cells
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An organic light-emitting display device having a touch sensor is discussed. The organic light-emitting display device can include a touch sensor formed in a single-layer structure and disposed on a touch insulating film overlapping an encapsulation unit disposed on a light-emitting element. First and second bridges and first and second touch electrodes included in the touch sensor having a single-layer structure are formed of the same material as each other in the same plane, e.g., on the touch insulating film, thereby simplifying the structure thereof and reducing costs.

Claims

1. An organic light-emitting display device comprising:

a light-emitting element disposed on a substrate;

an encapsulation unit disposed on the light-emitting element;

a touch insulating film disposed on the encapsulation unit; and

a touch sensor disposed on the touch insulating film,

wherein the touch sensor comprises;

first touch electrodes arranged on the touch insulating film in a first direction, the first touch electrodes being connected to each other via first bridges; and

second touch electrodes arranged on the touch insulating film in a second direction, the second touch electrodes being connected to each other via second bridges, and

wherein the first and second bridges and the first and second touch electrodes are formed of a same material as each other in a same plane, and the first and second bridges and the first and second touch electrodes are disposed on the touch insulating film.

2. The organic light-emitting display device according to claim 1, wherein the first bridges extend in a convoluted form along the second bridges and the second touch electrodes, and are connected to first bridges and first touch electrodes disposed adjacent thereto in the first direction, and

wherein the second bridges are disposed between the first bridges, and are connected to second bridges and second touch electrodes disposed adjacent thereto in the second direction.

3. The organic light-emitting display device according to claim 1, wherein the first bridges are disposed between the second bridges, and are connected to first bridges and first touch electrodes disposed adjacent thereto in the first direction, and

wherein the second bridges extend in a convoluted form along the first bridges and the first touch electrodes, and are connected to second bridges and second touch electrodes disposed adjacent thereto in the second direction.

4. The organic light-emitting display device according to claim 1, further comprising:

a routing line connected to each of the first touch electrodes and the second touch electrodes, the routing line being disposed on a lateral surface of the encapsulation unit; and

a touch pad connected to the routing line, the touch pad being disposed on the touch insulating film.

5. The organic light-emitting display device according to claim 4, wherein the first and second bridges, the first and second touch electrodes, the routing line and the touch pad are formed of a material selected from among ITO, IZO, IGZO, and silver nanowire (AgNW).

6. The organic light-emitting display device according to claim 4, wherein each of the first and second touch electrodes comprises:

an opaque conductive film formed in a mesh structure; and

a transparent conductive film disposed on or under the opaque conductive film,

wherein each of the first and second bridges, the routing line and the touch pad comprises;

an opaque conductive film; and

a transparent conductive film disposed on or under the opaque conductive film in a same pattern as the opaque conductive film,

wherein the transparent conductive film is formed of a material selected from among ITO, IZO, IGZO, and silver nanowire (AgNW), and

wherein the opaque conductive film is formed of at least one material of Al, Ti, Cu, or Mo, and has a single-layer or multi-layer structure.

7. The organic light-emitting display device according to claim 6, wherein the opaque conductive film of each of the first and second touch electrodes and the first and second bridges is disposed at a position corresponding to a bank forming a light-emitting area of the light-emitting element.

8. The organic light-emitting display device according to claim 1, further comprising:

color filters disposed on or under the touch sensor; and

black matrixes disposed between the color filters.

9. The organic light-emitting display device according to claim 4, further comprising:

a lateral protective film covering a lateral surface of the touch pad.

10. The organic light-emitting display device according to claim 9, further comprising:

a touch protective film exposing the routing line and the touch pad, the touch protective film overlapping the touch sensor,

wherein the lateral protective film and the touch protective film are formed of a same material.

11. The organic light-emitting display device according to claim 1, wherein at least one of the first bridges or the second bridges has therein a plurality of slits.

12. The organic light-emitting display device according to claim 4, wherein the substrate comprises a bending area and is formed of a flexible material.

13. The organic light-emitting display device according to claim 12, further comprising:

a plurality of connection electrodes disposed in the bending area to connect the routing line and the touch pad to each other;

a crack prevention layer disposed on the plurality of connection electrodes, the crack prevention layer overlapping the plurality of connection electrodes, the crack prevention layer being formed of an organic insulating material; and

a trench penetrating an inorganic encapsulation layer and the touch insulating film to expose the crack prevention layer.

14. The organic light-emitting display device according to claim 13, wherein the touch pad is connected to the plurality of connection electrodes exposed through a pad contact hole penetrating the inorganic encapsulation layer included in the encapsulation unit and the touch insulating film.

15. The organic light-emitting display device according to claim 1, wherein the first and second directions are substantially perpendicular to each other.