Touch panel, method for manufacturing the same and touch device

• US 10,712,877 B2
• Filed: 05/16/2017
• Issued: 07/14/2020
• Est. Priority Date: 06/20/2016
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Haisheng, Dong, Xue, Lv, Jing, Chen, Xiaochuan, Ding, Xiaoliang, Liu, Yingming, Xu, Rui, Yang, Shengji, Liu, Wei, Li, Changfeng, Wang, Pengpeng
• Primary Examiner(s): Chatly, Amit
• Application Number:
  US15/572,373
• Publication Number:
  US 20190212839A1
• Time in Patent Office: 1,155 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 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 3/03545 Pens or stylus
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0442 using active external devices, e.g. active pens, for transmitting changes in electrical potential to be received by the digitiser

Abstract

A touch panel, a method for manufacturing the same and a touch device are provided. The touch panel includes a base substrate, and a touch electrode and an active stylus electrode arranged on the base substrate. The active stylus electrode has a size smaller than the touch electrode. The touch electrode is configured to determine a touch position of a finger, and the active stylus electrode is configured to determine a touch position of an active stylus.

Claims

1. A touch panel, comprising a base substrate, and a touch electrode and an active stylus electrode arranged on the base substrate, wherein the active stylus electrode has a size smaller than that of the touch electrode, a touch position of a finger is only determined by the touch electrode, and a touch position of an active stylus is only determined by the active stylus electrode,

wherein the touch electrode comprises a touch sensing electrode and a touch driving electrode,

the touch sensing electrode and the touch driving electrode cross to each other and are arranged at different layers,

each of the touch sensing electrode and the touch driving electrode is a strip-like electrode,

each active stylus electrode is arranged outside the corresponding touch electrode created from a layer identical to the active stylus electrode.

2. The touch panel according to claim 1, wherein the touch panel is a mutual-capacitive touch panel, and the touch electrode comprise a touch sensing electrode and a touch driving electrode.

3. The touch panel according to claim 2, wherein the active stylus electrode is created from a layer identical to the touch sensing electrode or the touch driving electrode and made of a same material with the touch sensing electrode or the touch driving electrode.

4. The touch panel according to claim 1, wherein the touch panel is a self-capacitive touch panel, and the touch electrode is a self-capacitive touch electrode.

5. The touch panel according to claim 4, wherein the active stylus electrode is created from a layer identical to the self-capacitive touch electrode and made of a same material with the self-capacitive touch electrode.

6. The touch panel according to claim 3, wherein the touch panel is an in-cell touch display panel.

7. The touch panel according to claim 6, further comprising a common electrode, wherein the common electrode is divided into a plurality of common sub-electrodes, a part of the plurality of common sub-electrodes are multiplexed as the active stylus electrode, and the other part of the plurality of common sub-electrodes are multiplexed as the touch electrode created from a layer identical to the active stylus electrode and made of a same material.

8. The touch panel according to claim 3, wherein the touch electrode created from a layer identical to the active stylus electrode and made of a same material comprises at least one hollowed-out region, and the active stylus electrode is located in the at least one hollowed-out region.

9. The touch panel according to claim 8, wherein a plurality of active stylus electrodes are located in each hollowed-out portion of the at least one hollowed-out portion.

10. The touch panel according to claim 1, wherein a plurality of active stylus electrodes are arranged on the base substrate, and the touch panel further comprises a plurality of active stylus electrode lines connected to the plurality of active stylus electrodes in a one-to-one correspondence manner.

11. The touch panel according to claim 10, wherein the plurality of active stylus electrode lines are created from a layer identical to one conductive material layer of the touch panel and made of a same material with the conductive material layer.

12. The touch panel according to claim 11, wherein the conductive material layer is a source-drain metal layer.

13. The touch panel according to claim 1, wherein an orthogonal projection of the active stylus electrode onto the base substrate does not overlap an orthogonal projection of the touch electrode onto the base substrate.

14. The touch panel according to claim 1, wherein the touch electrode is of a rectangular, diamond or circular shape, or the active stylus electrode is of a rectangular, diamond or circular shape.

15. The touch panel according to claim 14, wherein the touch electrode and the active stylus electrode are both a rectangular shape, the touch electrode has a size greater than or equal to 4 mm*4 mm, and the active stylus electrode has a size smaller than or equal to 1 mm*1 mm.

16. A touch device, comprising:

a touch panel comprising a base substrate, and a touch electrode and an active stylus electrode arranged on the base substrate, the active stylus electrode having a size smaller than the touch electrode;

an active stylus touch detection module connected to the active stylus electrode and configured to detect a capacitance of the active stylus electrode and only determine a touch position of an active stylus in accordance with a capacitance change in the active stylus electrode; and

a touch detection module connected to the touch electrode and configured to detect a capacitance of the touch electrode and only determine a touch position of a finger in accordance with a capacitance change in the touch electrode,

wherein the touch electrode comprises a touch sensing electrode and a touch driving electrode,

the touch sensing electrode and the touch driving electrode cross to each other and are arranged at different layers,

each of the touch sensing electrode and the touch driving electrode is a strip-like electrode,

each active stylus electrode is arranged outside the corresponding touch electrode created from a layer identical to the active stylus electrode.

17. The touch device according to claim 16, wherein the active stylus touch detection module is connected to the active stylus electrode via an active stylus electrode line, a plurality of active stylus electrode lines are connected to a plurality of active stylus electrodes in a one-to-one correspondence manner.

18. A method for manufacturing a touch panel, comprising steps of:

providing a base substrate; and

forming a touch electrode and an active stylus electrode on the base substrate, the active stylus electrode having a size smaller than the touch electrode, the touch electrode being configured to only determine a touch position of a finger, and the active stylus electrode being configured to only determine a touch position of an active stylus,

wherein the touch electrode comprises a touch sensing electrode and a touch driving electrode,

the touch sensing electrode and the touch driving electrode cross to each other and are arranged at different layers,

each of the touch sensing electrode and the touch driving electrode is a strip-like electrode,

each active stylus electrode is arranged outside the corresponding touch electrode created from a layer identical to the active stylus electrode.

19. The method according to claim 18, wherein the touch panel is a mutual-capacitive touch panel and includes a plurality of touch electrodes and a plurality of active stylus electrodes, the plurality of touch electrodes comprise a plurality of touch sensing electrodes and a plurality of touch driving electrodes, and the step of forming the plurality of touch electrodes and the plurality of active stylus electrodes on the base substrate comprises forming one layer of the touch sensing electrodes or the touch driving electrodes together with the active stylus electrodes through a single patterning process.

20. The method according to claim 18, wherein the touch panel is a self-capacitive touch panel and includes a plurality of touch electrodes and a plurality of active stylus electrodes, the plurality of touch electrodes are a plurality of self-capacitive touch electrodes, and the step of forming the plurality of touch electrodes and the plurality of active stylus electrodes on the base substrate comprises forming the plurality of active stylus electrodes and the plurality of self-capacitive touch electrodes through a single patterning process.