Display device with integrated touch screen

• US 10,409,411 B2
• Filed: 03/25/2019
• Issued: 09/10/2019
• 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:
  US16/363,968
• Publication Number:
  US 20190220126A1
• Time in Patent Office: 169 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 method for manufacturing a display device with an integrated touch screen, comprising:

forming an organic light emitting device layer on a substrate;

forming an encapsulation layer covering and surrounding the organic light emitting device layer;

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

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

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

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

6. The method of claim 1, further comprising:

forming a plurality of color filters in a plurality of areas divided by the black matrix, after forming the black matrix and before forming the bridge electrodes,

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 method 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 method 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 method of claim 8, further comprising:

forming an overcoat layer on the first color filter, the second color filter, and the third color filter, after forming the color filters and before forming the bridge electrodes.

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

11. The method 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 method 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 method 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 method 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 plurality of second touch electrodes.

15. The method of claim 1, further comprising:

forming a first touch line electrically connected with the first touch electrodes and a second touch line electrically connected with the second touch electrodes on the encapsulation layer,

wherein the first touch line and the second touch line are disposed on a same layer.

16. The method of claim 1, further comprising:

forming a thin film transistor (TFT) layer on the substrate, before forming the organic light emitting layer; and

depositing a passivation layer covering the TFT layer 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. The method of claim 1, further comprising:

disposing a second substrate on the first substrate, wherein the second substrate covers the black matrix.