Touch substrate and touch device

• US 10,209,812 B2
• Filed: 06/18/2015
• Issued: 02/19/2019
• Est. Priority Date: 12/29/2014
• Status: Expired due to Fees

• 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
• Primary Examiner(s): Iluyomade, Ifedayo B
• Application Number:
  US14/893,300
• Publication Number:
  US 20160357313A1
• Time in Patent Office: 1,342 Days
• Field of Search: None
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/134309 characterised by their geometrical arrangement
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/134372 for fringe field switching [FFS] where the common electrode is not patterned
• 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 2203/04111 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 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens

Abstract

A touch substrate and a touch device are provided. The touch substrate includes a thin film transistor, and a common electrode layer and a pixel electrode layer that are transparent. The common electrode layer includes a common electrode and a touch driving electrode that extend along a first direction, and an insulating medium is provided between the common electrode and the touch driving electrode. On the touch substrate, there is further provided a touch sensing electrode that is disposed in a layer different from the touch driving electrode and extends along a second direction, and the touch sensing electrode covers a gap region between the common electrode and the touch driving electrode. Within a period of displaying a frame of image, the touch driving electrode transmits a common electrode signal and a touch scanning signal in a time-division mode.

Claims

1. A touch substrate, comprising a base substrate, a thin film transistor, and common electrode layer and a pixel electrode layer that are transparent, the thin film transistor, the common electrode layer and the pixel electrode layer being on the base substrate, wherein, the common electrode layer includes a common electrode and a touch driving electrode that extend along a first direction, and an insulating medium is provided between the common electrode and the touch driving electrode;

on the base substrate, there is further provided a plurality of touch sensing electrodes that are disposed in a layer different from the touch driving electrode and extend along a second direction, the common electrode does not further serve as the touch driving electrode, and the plurality of touch sensing electrodes covers a gap region between the common electrode and the touch driving electrode;

within a period of displaying a frame of image, the touch driving electrode transmits a common electrode signal and a touch scanning signal in a time-division mode;

there is no overlapped region between the touch driving electrode and each of the plurality of touch sensing electrodes; and

the common electrode layer, the pixel electrode layer and the plurality of touch sensing electrodes are sequentially disposed on the base substrate, and the common electrode layer is closer to the base substrate compared with the pixel electrode layer and the plurality of touch sensing electrodes.

2. The touch substrate according to claim 1, wherein,

a gate line and a data line disposed in different layers are formed on the base substrate;

the touch driving electrode includes a plurality of sub-electrodes extending along a direction of the gate line and connected to each other, the common electrode includes a plurality of sub-electrodes provided between the sub-electrodes of the touch driving electrode; and

each of the plurality of touch sensing electrodes includes a plurality of frame-like sub-electrodes extending along a direction of the data line and connected to each other.

3. The touch substrate according to claim 1, wherein,

a gate line and a data line disposed in different layers are formed on the base substrate;

the touch driving electrode includes a plurality of sub-electrodes extending along a direction of the data line and connected to each other, the common electrode includes a plurality of sub-electrodes provided between the sub-electrodes of the touch driving electrode; and

each of the plurality of touch sensing electrodes includes a plurality of frame-like sub-electrodes extending along a direction of the gate line and connected to each other.

4. The touch substrate according to claim 2, wherein,

the plurality of sub-electrodes of the touch driving electrode are diamond-shaped electrodes,

the plurality of sub-electrodes of the common electrode are diamond-shaped electrodes, and

the plurality of frame-like sub-electrodes of each of the plurality of touch sensing electrodes are diamond-shaped frame-like electrodes.

5. The touch substrate according to claim 2, wherein,

the plurality of sub-electrodes of the common electrode are connected with each other by a common electrode line disposed in a same layer as the gate line.

6. The touch substrate according to claim 2, wherein,

the touch driving electrode is connected to a connecting electrode through a hole, and the connecting electrode is disposed in a same layer as the gate line.

7. The touch substrate according to claim 2, wherein,

the plurality of frame-like sub-electrodes of each of the plurality of touch sensing electrodes are provided not only to cover the gap region between the common electrode and the touch driving electrodes but also to cover a portion of the common electrode.

8. The touch substrate according to claim 1, wherein,

the pixel electrode layer includes a plurality of pixel electrodes arranged in a matrix form;

each of the plurality of touch sensing electrodes includes metallic grid lines that extend transversely or longitudinally and connected with each other, the metallic grid lines extending transversely are provided between adjacent rows of the pixel electrodes, and the metallic grid lines extending longitudinally are provided between adjacent columns of the pixel electrodes.

9. The touch substrate according to claim 1, wherein, the common electrode layer is a plate-like electrode layer, and the pixel electrode layer is a slit electrode layer.

10. A touch device, comprising the touch substrate according to claim 1.

11. The touch device according to claim 10, further comprising a counter substrate, wherein,

a color filter layer and a black matrix are provided on the counter substrate;

and

a projection of each of the plurality of touch sensing electrodes of the touch substrate on the counter substrate is within a region of the black matrix.

12. The touch substrate according to claim 3, wherein,

the plurality of sub-electrodes of the touch driving electrode are diamond-shaped electrodes,

the plurality of sub-electrodes of the common electrode are diamond-shaped electrodes, and

the plurality of frame-like sub-electrodes of each of the plurality of touch sensing electrodes are diamond-shaped frame-like electrodes.

13. The touch substrate according to claim 3, wherein,

the plurality of sub-electrodes of the common electrode are connected with each other by a common electrode line disposed in a same layer as the gate line.

14. The touch substrate according to claim 3, wherein,

the touch driving electrode is connected to a connecting electrode through a hole, and the connecting electrode is disposed in a same layer as the gate line.

15. The touch substrate according to claim 3, wherein,

the plurality of frame-like sub-electrodes of each of the plurality of touch sensing electrodes are provided not only to cover the gap region between the common electrode and the touch driving electrodes but also to cover a portion of the common electrode.

16. The touch substrate according to claim 2, wherein,

the pixel electrode layer includes a plurality of pixel electrodes arranged in a matrix form;

each of the plurality of touch sensing electrodes includes metallic grid lines that extend transversely or longitudinally and connected with each other, the metallic grid lines extending transversely are provided between adjacent rows of the pixel electrodes, and the metallic grid lines extending longitudinally are provided between adjacent columns of the pixel electrodes.

17. The touch substrate according to claim 2, wherein,

the common electrode layer, the pixel electrode layer and the plurality of touch sensing electrodes are sequentially disposed on the base substrate, and the common electrode layer is closer to the base substrate compared with the pixel electrode layer and the plurality of touch sensing electrodes.

18. The touch substrate according to claim 3, wherein,

the pixel electrode layer includes a plurality of pixel electrodes arranged in a matrix form;

each of the plurality of touch sensing electrodes includes metallic grid lines that extend transversely or longitudinally and connected with each other, the metallic grid lines extending transversely are provided between adjacent rows of the pixel electrodes, and the metallic grid lines extending longitudinally are provided between adjacent columns of the pixel electrodes.

19. The touch substrate according to claim 3, wherein, the common electrode layer, the pixel electrode layer and the plurality of touch sensing electrodes are sequentially disposed on the base substrate, and the common electrode layer is closer to the base substrate compared with the pixel electrode layer and the plurality of touch sensing electrodes.