Display device with integrated touch screen

• US 10,310,650 B2
• Filed: 07/07/2017
• Issued: 06/04/2019
• Est. Priority Date: 12/26/2016
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: Heo, JoonYoung, Kang, Yeonsuk
• Primary Examiner(s): Balaoing, Ariel A
• Application Number:
  US15/644,507
• Publication Number:
  US 20180181240A1
• Time in Patent Office: 697 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04111 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 Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• 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 59/122 Pixel-defining structures or layers, e.g. banks
• 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 59/873 Encapsulations
• CPC Class Codes: H10K 59/8792 comprising light absorbing layers, e.g. black layers

Abstract

Disclosed are a display device with integrated touch screen, in which a touch sensing layer is provided on an encapsulation layer without forming a separate insulation layer, and thus, an increase in thickness caused by the touch sensing layer is minimized. The display device with integrated touch screen includes a plurality of first touch electrodes and a plurality of second touch electrodes disposed on a substrate, a black matrix disposed on the plurality of first touch electrodes and the plurality of second touch electrodes, and a plurality of bridge electrodes on the black matrix, the plurality of bridge electrodes disposed to electrically connect the plurality of first touch electrodes. The plurality of bridge electrodes are connected to the plurality of first touch electrodes through a plurality of contact holes passing through the black matrix, respectively.

Claims

1. A display device with integrated touch screen, the display device comprising:

an organic light emitting device layer on a substrate;

an encapsulation layer covering the organic light emitting device layer to surround and encapsulate the organic light emitting device layer;

a plurality of first touch electrodes and a plurality of second touch electrodes on the encapsulation layer;

a black matrix on the plurality of first touch electrodes and the plurality of second touch electrodes; and

a plurality of bridge electrodes on the black matrix, the plurality of bridge electrodes electrically connecting the plurality of first touch electrodes,

wherein the plurality of bridge electrodes are connected to the plurality of first touch electrodes through a plurality of contact holes passing through the black matrix.

2. The display device of claim 1, wherein the black matrix is provided on the plurality of first touch electrodes and the plurality of second touch electrodes.

3. The display device of claim 1, wherein the black matrix is provided between the plurality of first touch electrodes and the plurality of second touch electrodes.

4. The display device of claim 1, wherein the organic light emitting device layer includes a bank disposed to overlap the black matrix.

5. The display device of claim 1, wherein the black matrix comprises an organic layer including a black pigment.

6. The display device of claim 1, further comprising a plurality of color filters in a plurality of areas divided by the black matrix,

wherein the plurality of color filters comprises a first color filter including a first color material, a second color filter including a second color material, and a third color filter including a third color material.

7. The display device of claim 6, wherein two of the first color filter, the second color filter, and the third color filter are provided to overlap each other on the plurality of bridge electrodes.

8. The display device of claim 6, wherein the first color filter, the second filter, and the third color filter are provided to overlap each other on the plurality of bridge electrodes.

9. The display device of claim 8, further comprising an overcoat layer disposed on the first color filter, the second color filter, and the third color filter.

10. The display device of claim 6, wherein the first color filter, the second color filter, and the third color filter are disposed between the first touch electrodes and the second touch electrodes.

11. The display device of claim 1, wherein the black matrix includes a plurality of first black matrixes arranged in a first direction and a plurality of second black matrixes arranged in a second direction different from the first direction, wherein the first black matrixes and the second black matrixes intersect each other to form a lattice type.

12. The display device of claim 11, wherein the plurality of bridge electrodes are disposed on the plurality of first black matrixes to overlap the plurality of first black matrixes.

13. The display device of claim 12, wherein the first touch electrodes are arranged in the first direction and connected to each other, and the second touch electrodes are arranged in the second direction and connected to each other.

14. The display device of claim 1, wherein the plurality of bridge electrodes are disposed on a layer different from a layer on which the first touch electrodes and the second touch electrodes are disposed, and intersect with the second touch electrodes.

15. The display device of claim 1, further comprising a first touch line electrically connected with the first touch electrodes and a second touch line electrically connected with the second touch electrodes, wherein the first touch line and the second touch line are disposed on a same layer.

16. The display device of claim 15, further comprising a thin film transistor (TFT) layer having a passivation layer, wherein each of the first touch electrodes and the second touch electrodes is connected with a pad through a contact hole exposing the pad through the passivation layer.

24. The display device of claim 1, further comprising:

a thin film transistor (TFT) layer on the substrate; and

a passivation layer covering the TFT on the substrate, wherein the organic light emitting device layer is disposed on the passivation layer,

wherein the encapsulation layer contacts at least a part of the passivation layer.

17. A display device with integrated touch screen, the display device comprising:

a first substrate, a second substrate, and an organic light emitting device layer, an encapsulation layer on the organic light emitting device layer, a touch sensing layer on the encapsulation layer, and a color filter layer disposed on the touch sensing layer between the first substrate and the second substrate,

wherein the touch sensing layer includes;

a plurality of first touch electrodes and a plurality of second touch electrodes on the encapsulation layer;

a black matrix on the plurality of first touch electrodes and the plurality of second touch electrodes; and

a plurality of bridge electrodes on the black matrix, the plurality of bridge electrodes electrically connecting the plurality of first touch electrodes,

wherein the black matrix and the bridge electrodes are disposed between the color filter layer and the encapsulation layer.

18. The display device of claim 17, wherein the color filter layer includes a first color filter, a second color filter, and a third color filter in a plurality of areas divided by the black matrix,

wherein the first color filter, the second color filter, and the third color filter are provided to overlap each other on the plurality of bridge electrodes.

19. The display device of claim 18, wherein one of the black matrix, the first color filter, the second color filter, and third color filter is disposed between the plurality of first touch electrodes and the plurality of second touch electrodes.

20. The display device of claim 18, wherein the color filter layer includes a transparent organic layer.

21. The display device of claim 20, wherein the transparent organic layer is formed of one or more of acryl resin, epoxy resin, phenolic resin, polyamide resin and polyimide resin.

22. The display device of claim 17, further comprising a first touch line electrically connected with the first touch electrodes and a second touch line electrically connected with the second touch electrodes, wherein the first touch line and the second touch line are disposed on a same layer.

23. The display device of claim 22, further comprising a thin film transistor (TFT) layer having a passivation layer and disposed under the organic light emitting device layer, wherein each of the first touch electrodes and the second touch electrodes is electrically connected with a pad through a contact hole exposing the pad through the passivation layer.