In-cell touch panel and display device

• US 9,778,802 B2
• Filed: 09/23/2014
• Issued: 10/03/2017
• Est. Priority Date: 05/30/2014
• 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: Yang, Shengji, Dong, Xue, Wang, Haisheng, Xue, Hailin, Liu, Yingming, Zhao, Weijie, Ding, Xiaoliang, Liu, Hongjuan, Li, Changfeng
• Primary Examiner(s): Bolotin, Dmitriy
• Application Number:
  US14/648,087
• Publication Number:
  US 20160266675A1
• Time in Patent Office: 1,106 Days
• Field of Search: 345173
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• 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 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• 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 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

An in-cell touch panel and a display device are provided, and the in-cell touch panel includes: an upper substrate and a lower substrate arranged oppositely to each other; a conductive layer which is provided on a side, facing the lower substrate, of the upper substrate or on a side, facing the upper substrate, of the lower substrate, and comprises a plurality of hollowed-out regions arranged in a matrix form; a plurality of self-capacitance electrodes insulated from the conductive layer and arranged in a layer in which the conductive layer is provided, each of the hollowed-out regions being provided therein with at least one of the self-capacitance electrodes; and a plurality of conductive wires respectively electrically connected with the self-capacitance electrodes. This in-cell touch panel can reduce the number of the conductive wires, so as to facilitate a narrow frame design and reduce the occurrence possibility of a larger touch blind area to a certain extent.

Claims

1. An in-cell touch panel, comprising:

an upper substrate and a lower substrate, arranged oppositely to each other;

a conductive layer, provided on a side, facing the lower substrate, of the upper substrate or on a side, facing the upper substrate, of the lower substrate, wherein the conductive layer comprises a plurality of hollowed-out regions arranged in a matrix form;

a plurality of self-capacitance electrodes, arranged in a layer in which the conductive layer is arranged, and insulated from the conductive layer, wherein each of the hollowed-out regions is provided therein with at least one of the self-capacitance electrodes, and

a plurality of conductive wires, uncrossed with each other, respectively electrically connected with the self-capacitance electrodes, and arranged in a layer different from the layer in which the conductive layer is arranged, wherein the conductive wires that the self-capacitance electrodes are respectively connected with are different.

2. The in-cell touch panel according to claim 1, further comprising:

a black matrix layer provided on the side, facing the lower substrate, of the upper substrate or on the side, facing the upper substrate, of the lower substrate;

wherein the conductive layer, the self-capacitance electrodes and the conductive wires each have an orthographic projection upon the lower substrate arranged within an orthographic projection, upon the lower substrate, of the black matrix layer.

3. The in-cell touch panel according to claim 2, wherein a pattern of an orthographic projection, upon the lower substrate, of each of the self-capacitance electrodes presents a lattice structure, and is arranged within the orthographic projection, upon the lower substrate, of the black matrix layer.

4. The in-cell touch panel according to claim 3, wherein each of the hollowed-out regions is provided therein with one of the self-capacitance electrodes and a shape of the hollowed-out region is identical to that of the self-capacitance electrode.

5. The in-cell touch panel according to claim 4, wherein each of opposite sides which respectively belong to two adjacent ones of the self-capacitance electrodes comprises a zigzag line.

6. The in-cell touch panel according to claim 5, wherein each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped in the zigzag line, is of a stepped structure, and two stepped structures have a same shape and match each other;

and/or

each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped in the zigzag line, is of a concave-convex structure, and two concave-convex structures have a same shape and match each other.

7. The in-cell touch panel according to claim 3, further comprising:

a touch detection chip, electrically connected with the conductive wires and configured for determining a touch position by detecting variation of capacitance value of each of the self-capacitance electrodes during a touch-scanning time period, and

peripheral wires, arranged at a position where a margin frame of the in-cell touch panel is arranged, and respectively electrically connected with the conductive wires;

wherein the conductive wires connect the self-capacitance electrodes to the position where the margin frame of the in-cell touch panel is arranged, respectively; and

the touch detection chip is electrically connected with the peripheral wires through wiring terminals.

8. The in-cell touch panel according to claim 2, wherein each of the hollowed-out regions is provided therein with one of the self-capacitance electrodes and a shape of the hollowed-out region is identical to that of the self-capacitance electrode.

9. The in-cell touch panel according to claim 8, wherein each of opposite sides which respectively belong to two adjacent ones of the self-capacitance electrodes comprises a zigzag line.

10. The in-cell touch panel according to claim 9, wherein each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped hi the zigzag line, is of a stepped structure, and two stepped structures have a same shape and match each other;

and/or

each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped in the zigzag line, is of a concave-convex structure, and two concave-convex structures have a same shape and match each other.

11. The in-cell touch panel according to claim 2, further comprising:

a touch detection chip, electrically connected with the conductive wires and configured for determining a touch position by detecting variation of capacitance value of each of the self-capacitance electrodes during a touch-scanning time period, and

peripheral wires, arranged at a position where a margin frame of the in-cell touch panel is arranged, and respectively electrically connected with the conductive wires;

wherein the conductive wires connect the self-capacitance electrodes to the position where the margin frame of the in-cell touch panel is arranged, respectively; and

the touch detection chip is electrically connected with the peripheral wires through wiring terminals.

12. The in-cell touch panel according to claim 1, wherein each of the hollowed-out regions is provided therein with one of the self-capacitance electrodes and a shape of the hollowed-out region is identical to that of the self-capacitance electrode.

13. The in-cell touch panel according to claim 12, wherein each of opposite sides which respectively belong to two adjacent ones of the self-capacitance electrodes comprises a zigzag line.

14. The in-cell touch panel according to claim 13, wherein each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped in the zigzag line, is of a stepped structure, and two stepped structures have a same shape and match each other;

and/or

each of the opposite sides which respectively belong to the two adjacent ones of the self-capacitance electrodes, shaped in the zigzag line, is of a concave-convex structure, and two concave-convex structures have a same shape and match each other.

15. The in-cell touch panel according to claim 1, further comprising:

a touch detection chip, electrically connected with the conductive wires and configured for determining a touch position by detecting variation of capacitance value of each of the self-capacitance electrodes during a touch-scanning time period, and

peripheral wires, arranged at a position where a margin frame of the in-cell touch panel is arranged, and respectively electrically connected with the conductive wires;

wherein the conductive wires connect the self-capacitance electrodes to the position where the margin frame of the in-cell touch panel is arranged, respectively; and

the touch detection chip is electrically connected with the peripheral wires through wiring terminals.

16. The in-cell touch panel according to claim 15, wherein the margin frame of the in-cell touch panel comprises four sides, and based on the conductive wires uncrossed with each other, each of the self-capacitance electrodes is connected to a side closest to the self-capacitance electrode through a corresponding conductive wire;

or the margin frame of the in-cell touch panel has a rectangular shape, and a direction toward which each of the conductive wires extends is consistent with a short-side direction of the margin frame.

17. The in-cell touch panel according to claim 1, wherein each of the hollowed-out regions is provided therein with one of the self-capacitance electrodes, and a distance between any point of an edge of the self-capacitance electrode and an edge of the hollowed-out region has a minimum value that is smaller than 6 microns;

and

the conductive layer comprises a plurality of elongated branches respectively arranged between adjacent rows of the hollowed-out regions and adjacent columns of the hollowed-out regions, and a width of each of the branches has a maximum value smaller than 2 millimeters.

18. The in-cell touch panel according to claim 1, wherein the conductive layer and the self-capacitance electrodes are configured to be used as a common electrode layer.

19. The in-cell touch panel according to claim 18, further comprising:

common electrode lines, electrically insulated from gate electrodes and gate lines and arranged in a layer in which the gate electrodes and the gate lines are provided, the gate electrodes and the gate lines being provided on the side, facing the upper substrate, of the lower substrate;

wherein the conductive layer is provided on the side, facing the upper substrate, of the lower substrate;

the common electrode lines and the common electrode layer are provided in different layers, and the common electrode lines are respectively electrically connected with the common electrode layer through via holes; and

the common electrode lines are configured to be used as the conductive wires.

20. A display device, comprising an in-cell touch panel which comprises:

an upper substrate and a lower substrate, arranged oppositely to each other;

a conductive layer, provided on a side, facing the lower substrate, of the upper substrate or on a side, facing the upper substrate, of the lower substrate, wherein the conductive layer comprises a plurality of hollowed-out regions arranged in a matrix form;

a plurality of self-capacitance electrodes, arranged in a layer in which the conductive layer is arranged, insulated from the conductive layer, wherein each of the hollowed-out regions is provided therein with at least one of the self-capacitance electrodes, and

a plurality of conductive wires, uncrossed with each other, respectively electrically connected with the self-capacitance electrode, and arranged in a layer different from the layer in which the conductive layer is arranged, wherein the conductive wires that the self-capacitance electrodes are respectively connected with are different.