CAPACITIVE TOUCH STRUCTURE, IN-CELL TOUCH PANEL, DISPLAY DEVICE AND SCANNING METHOD THEREOF

• US 20160282976A1
• Filed: 09/30/2014
• Published: 09/29/2016
• 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, ZHAO, Weijie, LIU, Yingming
• Granted Patent: US 9,529,484 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 3/04166 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

A capacitive touch structure, an in-cell touch panel, a display device and a scanning method thereof are disclosed. The capacitive touch structure includes: self-capacitance electrodes; block electrodes disposed in the same layer as self-capacitance electrodes; first wires connected with self-capacitance electrodes; second wires connected with block electrodes; and a touch sensing chip connected with the first wires and the second wires. There are at least adjacent self-capacitance electrodes that satisfy the following conditions: at least two block electrodes are provided between any two adjacent self-capacitance electrodes each of which corresponds to one self-capacitance electrode; block electrodes of one self-capacitance electrode are connected with the same second wire, block electrodes of adjacent self-capacitance electrodes are connected with different second wires, and one second wire is connected with block electrodes of at least two self-capacitance electrodes.

Claims

1. A capacitive touch structure comprising:

a plurality of self-capacitance electrodes disposed in a same layer and insulated from each other;

a plurality of block electrodes disposed in a same layer as the self-capacitance electrodes and insulated from the self-capacitance electrodes, wherein at least adjacent self-capacitance electrodes satisfy the following conditions;

at least two block electrodes are provided between any two adjacent self-capacitance electrodes, and each of the at least two block electrodes corresponds to only one self-capacitance electrode;

a plurality of first wires electrically connected with the self-capacitance electrodes while not intersecting each other, wherein the self-capacitance electrodes are each electrically connected with different first wires;

a plurality of second wires electrically connected with the block electrodes while not intersecting each other, wherein block electrodes corresponding to one self-capacitance electrode are electrically connected with a same one second wire, block electrodes corresponding to adjacent self-capacitance electrodes are electrically connected with different second wires, and one of the second wires is electrically connected with block electrodes corresponding to at least two self-capacitance electrodes; and

a touch sensing chip electrically connected with the first wires and second wires.

2. The capacitive touch structure of claim 1, wherein the self-capacitance electrodes are arranged in a matrix, and

two block electrodes are provided between any two adjacent self-capacitance electrodes, each of the two block electrodes corresponds to one self-capacitance electrode of the two adjacent self-capacitance electrodes, and each of the block electrodes corresponds to different self-capacitance electrode.

3. The capacitive touch structure of claim 2, wherein each of the self-capacitance electrode is provided with block electrodes corresponding to itself and disposed around it, and

block electrodes around each self-capacitance electrode form a closed region surrounding the self-capacitance electrode.

4. The capacitive touch structure of claim 3, wherein the first wires and the self-capacitance electrodes are disposed in different layers.

5. The capacitive touch structure of claim 4, wherein the second wires and the block electrodes are disposed in a same layer;

each column of the block electrodes are connected with two of the second wires, one of the two second wires is connected with odd numbered rows of the block electrodes, and the other of the two second wires is connected with even numbered rows of the block electrodes;

or

each row of the block electrodes are connected with two of the second wires, one of the two second wires is connected with odd numbered columns of the block electrodes, and the other of the two second wires is connected with even numbered columns of the block electrodes.

6. The capacitive touch structure of claim 5, wherein the first wires connect the self-capacitance electrodes to a margin frame of the touch panel;

and the second wires connect the block electrodes to the margin frame of the touch panel;

the touch panel further comprises periphery wirings at the margin frame of the touch panel which are electrically connected with the first wires and the second wires; and

the touch sensing chip is electrically connected with the periphery wirings via connection terminals.

7. The capacitive touch structure of claim 6, wherein each of the self-capacitance electrodes is provided with block electrodes corresponding to itself and disposed around it, and the block electrodes around each self-capacitance electrode form a closed region surrounding the self-capacitance electrode;

and each column of the block electrodes are connected with at least two of the second wires; and

the margin frame of the touch panel is of a rectangle shape, and extension directions of the first wires and second wires are consistent with a direction of a short side of the margin frame.

8. The capacitive touch structure of claim 1, wherein opposite sides of adjacent two of self-capacitance electrodes are both fold lines;

the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have step-like structures that are consistent and matching each other; and

/or

the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have concave-convex structures that are consistent and matching each other.

9. An in-cell touch panel comprising a top substrate and a bottom substrate disposed oppositely to each other and the capacitive touch structure of claim 1;

wherein the self-capacitance electrodes, the block electrodes, the first wires and the second wires are disposed on a side of the top substrate, which side faces the bottom substrate, or on a side of the bottom substrate, which side faces the top substrate.

10. The in-cell touch panel of claim 9, further comprising:

a black matrix layer disposed on a side of the top substrate facing the bottom substrate or on a side of the bottom substrate facing the top substrate;

wherein orthogonal projections of the self-capacitance electrodes, the block electrodes, the first wires and the second wires on the bottom substrate are within an orthogonal projection of the black matrix layer on the bottom substrate.

11. The in-cell touch panel of claim 10, wherein a pattern of orthogonal projections of the self-capacitance electrodes and block electrodes on the bottom substrate is of a mesh structure within the orthogonal projection of the black matrix layer on the bottom substrate.

12. The in-cell touch panel of claim 10, wherein the black matrix layer is located on a side of the top substrate that faces the bottom substrate, and a color filter layer is further disposed on the black matrix layer;

and

the self-capacitance electrodes, the block electrodes and the second wires are disposed in a same layer and between the black matrix layer and the color filter layer;

the first wires are located on the color filter layer and electrically connected with corresponding self-capacitance electrodes through via holes in the color filter layer.

13. The in-cell touch panel of claim 9, wherein the self-capacitance electrodes, the block electrodes, the first wires and the second wires are disposed on a side of the bottom substrate that faces the top substrate;

and

the self-capacitance electrodes and the block electrodes are used as a common electrode layer.

15. A display device comprising the capacitive touch structure of claim 1.

16. A scanning method for the display device of claim 15, comprising:

conducting touch scanning and display scanning in a time-division manner in one frame period;

wherein;

in a touch scanning interval, the touch sensing chip applies driving signals to block electrodes at the same time through second wires and periphery wirings connected with block electrodes; and

applies driving signals to self-capacitance electrodes in a time-division manner through first wires and periphery wirings connected with self-capacitance electrodes;

receives feedback signals of self-capacitance electrodes and block electrodes, and determines touch positions according to feedback signals.

17. The capacitive touch structure of claim 2, wherein the first wires connect the self-capacitance electrodes to a margin frame of the touch panel;

and the second wires connect the block electrodes to the margin frame of the touch panel;

the touch panel further comprises periphery wirings at the margin frame of the touch panel which are electrically connected with the first wires and the second wires; and

the touch sensing chip is electrically connected with the periphery wirings via connection terminals.

18. The capacitive touch structure of claim 17, wherein each of the self-capacitance electrodes is provided with block electrodes corresponding to itself and disposed around it, and the block electrodes around each self-capacitance electrode form a closed region surrounding the self-capacitance electrode;

and each column of the block electrodes are connected with at least two of the second wires; and

the margin frame of the touch panel is of a rectangle shape, and extension directions of the first wires and second wires are consistent with a direction of a short side of the margin frame.

19. The capacitive touch structure of claim 2, wherein opposite sides of adjacent two of self-capacitance electrodes are both fold lines;

the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have step-like structures that are consistent and matching each other; and

/or

the opposite sides of adjacent two self-capacitance electrodes that are fold lines both have concave-convex structures that are consistent and matching each other.

20. The capacitive touch structure of claim 3, wherein the first wires connect the self-capacitance electrodes to a margin frame of the touch panel;

and the second wires connect the block electrodes to the margin frame of the touch panel;

the touch panel further comprises periphery wirings at the margin frame of the touch panel which are electrically connected with the first wires and the second wires; and

the touch sensing chip is electrically connected with the periphery wirings via connection terminals.

21. The capacitive touch structure of claim 20, wherein each of the self-capacitance electrodes is provided with block electrodes corresponding to itself and disposed around it, and the block electrodes around each self-capacitance electrode form a closed region surrounding the self-capacitance electrode;

and each column of the block electrodes are connected with at least two of the second wires; and

the margin frame of the touch panel is of a rectangle shape, and extension directions of the first wires and second wires are consistent with a direction of a short side of the margin frame.

14. (canceled)