Touch electrode and fabricating method thereof, capacitive touch device and touch dislay device

• US 9,684,401 B2
• Filed: 12/07/2013
• Issued: 06/20/2017
• Est. Priority Date: 05/02/2013
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., Chengdu BOE Optoelectronics Technology Company Limited (BOE Technology Group Co., Ltd.)
• Inventors: Wang, Jing, Lu, Youqiang, Qiu, Yun
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US14/358,477
• Publication Number:
  US 20150193064A1
• Time in Patent Office: 1,291 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 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: Y10T 29/49105 Switch making

Abstract

The present invention disclose a touch electrode structure and a fabricating method thereof, a capacitive touch device and a touch display device to improve the touch linearity and the report rate of the capacitive touch device. The touch electrode structure provided by the embodiments of the present invention comprises a plurality of electrode assemblies and a plurality of electrode pins for connecting a touch circuit. Wherein, each electrode assembly comprises two electrodes which are disposed at the same layer, insulated from each other and cross with each other complementarily, and each electrode comprises at least two sub-electrodes which are in mutual electrical connection with each other. The sub-electrodes of different electrodes of each electrode assembly are spaced apart from each other one by one, and each electrode is connected with an electrode pin.

Claims

1. A touch electrode structure, comprising a plurality of electrode assemblies and a plurality of electrode pins for connecting a touch circuit, and at least two tag pins which are distributed at two sides of all the electrode pins, wherein,

each electrode assembly comprises two electrodes which are disposed at a same layer and insulated from each other and cross with each other complementarily, and each electrode comprises at least two sub-electrodes which are in mutual electrical connection with each other, and the sub-electrodes of different electrodes of each electrode assembly are spaced apart from each other one by one, and each electrode is connected with one of the electrode pins,

wherein the touch electrode structure is formed on a color filter substrate, wherein the color filter substrate is formed with a black matrix layer which is provided with an alignment tag for connecting the electrode pins with the touch circuit, and

wherein the alignment tag is a hollowed-out shape on the black matrix layer, and the hollowed-out shape is the same as a shape of the tag pins.

2. The touch electrode structure according to claim 1, wherein, the sub-electrodes are the shape of a triangle.

3. The touch electrode structure according to claim 2, wherein, the sub-electrodes are the shape of a right triangle.

4. The touch electrode structure according to claim 1, wherein, the electrodes, the electrode pins and tag pins are located at the same layer.

5. The touch electrode structure according to claim 4, wherein, material of the touch electrode structure is a transparent conductive material or metal material.

6. A touch display device, comprising a touch layer and a display panel, the touch layer being formed on the display panel and comprising the touch electrode structure according to claim 1.

7. The touch display device according to claim 6, wherein, material of the touch electrode structure is a transparent conductive material.

8. The touch display device according to claim 7, further comprising a protective layer formed on the touch layer.

9. The touch display device according to claim 7, wherein, the touch circuit is provided with a plurality of circuit pins, the touch layer is electrically connected with the touch circuit through the circuit pins and the electrode pins, the touch electrode structure further comprises a plurality of detection-purpose electrode pins disposed at the same layer with the electrode pins, the touch circuit is further provided with detection-purpose circuit pins, a conductive film is provided between the touch circuit and the touch layer, and the detection-purpose electrode pin and the detection-purpose circuit pin are used for monitoring the conductive film.

10. The touch display device according to claim 9, wherein, numbers of the detection-purpose electrode pins and the detection-purpose circuit pins are at least four.

11. A method for fabricating a touch electrode structure, comprising:

forming a plurality of electrode assemblies and a plurality of electrode pins for connecting a touch circuit, and at least two tag pins which are distributed at two sides of all the electrode pins, wherein,

each electrode assembly comprises two electrodes which are disposed at a same layer, insulated from each other and cross with each other complementarily, and each electrode comprises at least two sub-electrodes which are in mutual electrical connection with each other, and the sub-electrodes of different electrodes of each electrode assembly are spaced apart from each other one by one, and each electrode is connected with one of the electrode pins,

wherein the touch electrode structure is formed on a color filter substrate, wherein the color filter substrate is formed with a black matrix layer which is provided with an alignment tag for connecting the electrode pins with the touch circuit, and

wherein the alignment tag is a hollowed-out shape on the black matrix layer, and the hollowed-out shape is the same as a shape of the tag pins.

12. The method according to claim 11, wherein, the sub-electrodes are the shape of a triangle.

13. The method according to claim 12, wherein, the sub-electrodes are the shape of a right triangle.

14. The method according to claim 11, wherein, the electrodes, the electrode pins and tag pins are located at the same layer.

15. The method according to claim 14, wherein, material of the touch electrode structure is a transparent conductive material or metal material.