Array substrate including touch electrode lines of different layers, method for manufacturing the same, and touch display panel

• US 10,203,788 B2
• Filed: 10/19/2015
• Issued: 02/12/2019
• Est. Priority Date: 06/10/2015
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Wang, Lei, Yang, Shengji, Chen, Xiaochuan, Xu, Rui, Lu, Pengcheng, Li, Changfeng, Lv, Zhenhua, Dong, Xue, Liu, Yingming
• Primary Examiner(s): Snyder, Adam J
• Application Number:
  US15/302,994
• Publication Number:
  US 20170329442A1
• Time in Patent Office: 1,212 Days
• Field of Search: 345173, 178 1806
• CPC Class Codes: G02F 1/133 Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/13439 characterised by their electrical, optical, physical properties; materials therefor; method of making
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/121 common or background
• CPC Class Codes: G02F 2201/123 pixel
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

The present disclosure provides an array substrate, a method for manufacturing the same, and a touch display panel. The array substrate includes a transparent electrode and a plurality of touch electrode lines arranged on a base substrate. The transparent electrode includes a plurality of sub-electrodes, and each of the plurality of sub-electrodes is connected with a respective one of the plurality of touch electrode lines. Each of the touch electrode lines includes a first touch electrode line and a second electrode line arranged in different layers, and projections of the first touch electrode line and the second touch electrode line on the substrate are overlapped with each other.

Claims

1. An array substrate, comprising:

a transparent electrode and a plurality of touch electrode lines arranged on a base substrate,

wherein the transparent electrode comprises a plurality of sub-electrodes, the plurality of sub-electrodes are connected with the plurality of touch electrode lines respectively, each of the plurality of touch electrode lines comprises a first touch electrode line and a second touch electrode line arranged in different layers, and a projection of the first touch electrode line onto the base substrate completely coincides with a projection of the second touch electrode line onto the base substrate;

each of the first touch electrode line and the second touch electrode line comprises a line portion and a convex portion that is connected with the line portion and arranged in a same plane as the line portion, a shape of the line portion of the first touch electrode line is same as a shape of the line portion of the second touch electrode line, and a shape of the convex portion of the first touch electrode line is same as a shape of the convex portion of the second touch electrode line; and

the sub-electrode is electrically connected with the first touch electrode line, the second touch electrode line, or the first touch electrode line and the second touch electrode line through merely one via hole corresponding to the convex portion.

2. The array substrate according to claim 1, further comprising a plurality of Thin Film Transistors (TFTs) and a plurality of pixel electrodes,

wherein the plurality of pixel electrodes are electrically connected with drain electrodes of the plurality of TFTs respectively;

and

at a display stage, the sub-electrodes further function as a common electrode.

3. The array substrate according to claim 2, wherein

the first touch electrode line and a source electrode and the drain electrode of the TFT are arranged in a same layer;

or

the first touch electrode line and a gate electrode of the TFT are arranged in the same layer.

4. The array substrate according to claim 1, wherein

both the first touch electrode line and the second touch electrode line are located in a non-light-transmissible region.

5. The array substrate according to claim 1, wherein

the sub-electrodes correspond to the plurality of touch electrode lines respectively in a one-to-one manner.

6. The array substrate according to claim 1, wherein

the second touch electrode line is arranged at a location between the first touch electrode line and the sub-electrode, the sub-electrode is arranged at a location away from the base substrate, and the first touch electrode line is arranged at a location close to the base substrate.

7. A touch display panel comprising the array substrate according to claim 1.

8. The touch display panel according to claim 7, wherein the array substrate further comprises a plurality of Thin Film Transistors (TFTs) and a plurality of pixel electrodes,

wherein the plurality of pixel electrodes are electrically connected with drain electrodes of the plurality of TFTs respectively;

and

at a display stage, the sub-electrodes further function as a common electrode.

9. The touch display panel according to claim 8, wherein

the first touch electrode line and a source electrode and the drain electrode of the TFT are arranged in a same layer;

or

the first touch electrode line and a gate electrode of the TFT are arranged in the same layer.

10. The touch display panel according to claim 7, wherein

the first touch electrode line and the second touch electrode line of the touch electrode line corresponding to the sub-electrode are electrically connected with each other via the sub-electrode.

11. The array substrate according to claim 1, wherein

the first touch electrode line and the second touch electrode line of the touch electrode line corresponding to the sub-electrode are electrically connected with each other via the sub-electrode.

12. A method for manufacturing an array substrate, comprising:

forming a transparent electrode and a plurality of touch electrode lines on a base substrate,

wherein the transparent electrode comprises a plurality of sub-electrodes, and the plurality of sub-electrodes are connected with the plurality of touch electrode lines respectively;

each of the plurality of touch electrode lines comprises a first touch electrode line and a second touch electrode line arranged in different layers, and a projection of the first touch electrode line onto the base substrate completely coincides with a projection of the second touch electrode line onto the base substrate;

each of the first touch electrode line and the second touch electrode line comprises a line portion and a convex portion that is connected with the line portion and arranged in a same plane as the line portion, a shape of the line portion of the first touch electrode line is same as a shape of the line portion of the second touch electrode line, and a shape of the convex portion of the first touch electrode line is same as a shape of the convex portion of the second touch electrode line; and

the sub-electrode is electrically connected with the first touch electrode line, the second touch electrode line, or the first touch electrode line and the second touch electrode line through merely one via hole corresponding to the convex portion.

13. The method according to claim 12, wherein

the first touch electrode line and a source electrode and a drain electrode of a Thin Film Transistor (TFT) are formed through a same patterning process;

or

the first touch electrode line and a gate electrode of the TFT are formed through the same patterning process.