WO2016201891A1

WO2016201891A1 - Touch control substrate and preparation method therefor, and display apparatus

Info

Publication number: WO2016201891A1
Application number: PCT/CN2015/095408
Authority: WO
Inventors: 李君�; 胡明; 张雷; 谢晓冬
Original assignee: 京东方科技集团股份有限公司; 合肥鑫晟光电科技有限公司
Priority date: 2015-06-15
Filing date: 2015-11-24
Publication date: 2016-12-22

Abstract

Provided is a touch control substrate, comprising a touch control region, said touch control region comprising a first electrode layer and a second electrode layer insulated against one another and arranged on a substrate (1), the first electrode layer comprising a plurality of sensing electrodes (4) arranged in rows and columns, and first connecting parts (8), and the second electrode layer comprising second connecting parts (2); adjacent sensing electrodes (4) in the same row are connected by means of the first connecting part (8), and adjacent sensing electrodes (4) in the same column are connected by means of the second connecting part (2), the first connecting parts (8) and the second connecting parts (2) intersecting and being insulated from each other; the side of the first electrode layer furthest from the second electrode layer is provided with connecting wires (7) connected to the sensing electrodes (4), the connecting wires being used for conveying touch control drive signals and touch control detection signals; and the connecting wires (7) lead out from the same side of the touch control substrate. Also provided is a preparation method for said touch control substrate, and a display apparatus, able to implement a frameless or narrow frame design.

Description

Touch substrate, preparation method thereof, and display device

Technical field

Embodiments of the present invention relate to a touch substrate, a method of fabricating the same, and a display device.

Background technique

In the traditional OGS (One Glass Solution) touch screen, in order to achieve accurate touch effects, the border of the touch screen should reserve a part of space to accommodate the driving circuit. However, for ease of use and aesthetics, today's digital products are increasingly demanding narrow borders (ie, the invisible areas of the screen have a narrow width). In order to accommodate a larger screen with a limited body size, reducing the width of the border, achieving a narrow border or even a borderless design has become a difficult design.

Summary of the invention

According to an embodiment of the invention, a touch substrate is provided, including a touch area. The touch area includes mutually insulated first electrode layers and second electrode layers disposed on the substrate, the first electrode layer including a plurality of sensing electrodes and first connecting portions arranged along rows and columns; The second electrode layer includes a second connecting portion; the sensing electrodes are connected by the first connecting portion in the same row; the sensing electrodes are connected in the same column by the second connecting portion; the first connecting portion and the first connecting portion The second connecting portion is insulated and intersects; a side of the first electrode layer remote from the second electrode layer is provided with a connecting line connected to the sensing electrode, and the connecting line is used for transmitting a touch driving signal or a touch Detecting signals; the connecting lines are drawn on the same side of the touch substrate.

For example, an orthographic projection of the connecting line at the first electrode layer is located in the touch area.

For example, the orthographic projection of the connecting line at the first electrode layer is between adjacent sensing electrodes.

For example, the touch substrate further includes a second insulating layer on a side of the first electrode layer away from the second electrode layer, wherein the connecting line passes through the second insulating layer and the sensing electrode position Corresponding vias are connected to the sensing electrodes.

For example, each of the sensing electrodes is led out through a connecting line; each of the sensing electrodes is led out through a connecting line.

For example, the second insulating layer is provided with a groove, and one end of the groove starts from the through hole Extending to the same side of the touch substrate.

For example, an orthographic projection of the groove at the first electrode layer is between the sensing electrodes.

For example, the connecting wires are made of a transparent conductive material.

For example, the transparent conductive material comprises a nanosilver material.

For example, a signal shielding layer is provided on the bottom surface of the groove.

For example, the signal shielding layer has a rough surface.

For example, the surface of the signal shielding layer has grooves or protrusions.

For example, the connection line is disposed on the signal shielding layer.

According to an embodiment of the invention, a method of fabricating a touch substrate is provided. The preparation method includes: forming a first electrode layer and a second electrode layer insulated from each other on a substrate, the first electrode layer including a plurality of sensing electrodes arranged in rows and columns, and a first connecting portion, the first The second electrode layer includes a second connecting portion, and the sensing electrodes are connected by the first connecting portion in the same row, and the sensing electrodes are connected in the same column by the second connecting portion, the first connecting portion and the second connecting portion The connecting portion is insulated and intersects; and a connecting line connected to the sensing electrode is formed on a side of the first electrode layer away from the second electrode layer, wherein the connecting line is used for transmitting a touch driving signal or touch detection And a signal is drawn on the same side of the touch substrate.

For example, the method further includes: forming a second insulating layer on a side of the first electrode layer away from the second electrode layer and forming a via hole corresponding to the position of the sensing electrode in the second insulating layer; And forming the connecting line on the second insulating layer. The connecting line is connected to the sensing electrode through the via.

For example, the method further includes: forming a second insulating layer on a side of the first electrode layer away from the second electrode layer, and forming a groove in the second insulating layer by using a two-tone mask a via hole corresponding to the position of the sensing electrode, one end of the groove extending from the via hole to the same side of the touch substrate; and the connecting line is formed in the groove. The connecting line is connected to the sensing electrode through the via.

For example, the method further includes: forming a signal shielding layer in the recess; and forming the connecting line on the signal shielding layer.

According to an embodiment of the present invention, there is also provided a display device. The display device also includes the above The touch substrate described.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .

1 is a cross-sectional view of a touch substrate in accordance with an embodiment of the present invention;

2 is a top plan view of a touch substrate according to an embodiment of the present invention;

3 is a cross-sectional view showing the touch substrate after the completion of the via holes and the grooves in the embodiment of the present invention;

4 is a cross-sectional view showing a touch substrate after applying a signal shielding layer according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view showing a touch substrate after a rough surface is formed on a signal shielding layer according to an embodiment of the invention.

detailed description

The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

As shown in FIG. 1-3, an embodiment of the present invention provides a touch substrate including a touch area including a first electrode layer and a second electrode layer which are insulated from each other on a substrate 1. The first electrode layer includes a plurality of sensing electrodes arranged in rows and columns and a first connecting portion 8; the second electrode layer includes a second connecting portion 2; the same row adjacent to the sensing electrode 4 passes through the first a connection portion 8; the same column adjacent to the sensing electrode 4 is connected by a second connection portion 2; the first connection portion 8 and the second connection portion 2 are insulated and intersected; the first electrode layer is away from the One side of the second electrode layer is provided with a connecting line 7 connected to the sensing electrode, and the connecting line 7 is used for transmitting a touch driving signal or a touch detection signal; the connecting line 7 is on the touch substrate. The same side is taken out.

The touch substrate provided by the embodiment of the present invention has all the connection lines 7 of the sensing electrodes 4 from the touch base. The same side of the board is led out, enabling a borderless or narrow bezel design.

It should be understood that the same side of the touch substrate generally refers to the side where the driving integrated circuit of the touch substrate is located, for example, the side of the touch screen of the mobile phone provided with the function keys (for example, the touch screen of the mobile phone) The lower end).

As shown in FIG. 2, in order to clearly show the relationship of the layers, the second insulating layer 5 is transparently shown in FIG. 2, and the arrangement of the sensing electrodes 4 and the gap region between the adjacent sensing electrodes 4 can be seen. 11. The connection line 7, the signal shielding layer 6 itself may be made of a transparent material; however, in order to facilitate understanding of the relationship of the layers, the figure is shown in black.

For example, an orthographic projection of the connecting line 7 at the first electrode layer is located in the touch area. Thus, the connecting line 7 is disposed in the touch area, thereby further avoiding the problem that the connecting line 7 is disposed in the peripheral area and the frame is wide. At the same time, the connecting line 7 can be flexibly arranged in the touch area, is convenient to manufacture, and reduces the manufacturing cost.

For example, the orthographic projection of the connecting line 7 at the first electrode layer is between adjacent sensing electrodes. In this way, it is possible to avoid the problem that the connecting line 7 is disposed at a periphery to cause a wide border, and it is possible to weaken the influence of the signal of the connecting line 7 on the sensing electrode signal.

For example, the touch substrate according to the embodiment of the present invention further includes a second insulating layer 5 on a side of the first electrode layer away from the second electrode layer, and the connecting line 7 passes through the second insulating layer 5 A via 9 corresponding to the position of the sensing electrode 4 is connected to the sensing electrode 4.

By arranging the connecting wires 7 and the sensing electrodes 4 in different layers, the arrangement of the connecting wires 7 is more flexible and free, and the connecting wires 7 are easily taken out from the same side of the touch substrate.

In this way, the pattern of the connecting line 7 can be designed into various patterns by considering factors such as parasitic capacitance, noise, visibility, etc., thereby eliminating the need for routing from the frame and achieving a borderless design. That is to say, the connecting lines 7 can be arranged as needed (as long as they do not intersect), for example, in order to reduce the length of each connecting line 7, a linear parallel arrangement can be employed.

As shown in FIG. 2 (partial connecting line 7 is shown in FIG. 2), for example, the sensing electrodes 4 are led out by a connecting line 7 per row; and each of the sensing electrodes 4 is led out by a connecting line 7.

Since each row or column of sensing electrodes 4 transmits the same touch driving signal or touch detection signal, the sensing electrodes 4 connected to each row or column can be led out through a connecting line 7.

As shown in FIGS. 1 and 2, for example, the second insulating layer 5 is provided with a recess 10 (a portion filled with the connecting line 7 and the signal shielding layer 6 in FIG. 1), and one end of the recess 10 is Said via 9 The dots extend to the same side of the touch substrate. The groove 10 in Fig. 2 is a grid line portion, and the groove 10 is at least partially covered by the connecting line 7.

The above-mentioned groove 10 is used for arranging the connecting wire 7 to facilitate the formation of the connecting wire 7 by screen printing. The connecting wire 7 is connected from the via hole 9 to the sensing electrode 4 while being drawn from the same side of the touch substrate.

For example, an orthographic projection of the groove 10 at the first electrode layer is located between the sensing electrodes 4. Thus, when the connection line 7 is provided in the recess 10, the influence of the drive signal or the detection signal in the connection line 7 on the touch detection can be reduced.

As shown in FIG. 2, for example, the respective connecting wires 7 are arranged in parallel to facilitate the production of the connecting wires 7.

For example, the connecting line 7 is made of a transparent conductive material. In this way, the light transmittance of the touch substrate can be increased.

For example, the connecting line 7 is made of a nanosilver material. Since the connecting wire 7 is made of a nano silver material, the square resistance of the connecting wire 7 can be reduced while ensuring transparency.

For example, a signal shielding layer 6 is disposed on the bottom surface of the recess 10. For example, the signal shielding layer 6 is made of a transparent material.

For example, the signal shielding layer 6 has a rough surface. Since the signal shielding layer 6 has a rough surface, the scattering of the light can be used to eliminate the shadow while shielding the signal.

For example, the surface of the signal shielding layer 6 has grooves or protrusions. The use of light scattering on the grooves or protrusions acts as a shadow. It should be understood that other types of rough surfaces are also possible.

For example, the connection line 7 is disposed on the signal shielding layer 6. This can make full use of the groove 10 area to reduce the thickness of the touch substrate.

According to an embodiment of the invention, a method for preparing a touch substrate is also provided. For example, the method includes the steps of: forming a connection line on the substrate on which the sensing electrode is formed, the connection line is connected to the sensing electrode, and the connection line is used for transmitting a touch driving signal or a touch detection signal, The connecting lines are drawn on the same side of the touch substrate.

For example, the preparation method includes the following steps:

Forming a second insulating layer on the substrate on which the sensing electrode is formed by a patterning process, wherein the second insulating layer includes a via hole exposing the sensing electrode, and one end is connected to the via hole and the other end is taken out from the same side of the touch substrate Groove

Forming a signal shielding layer in the groove;

Forming a rough surface on the signal shielding layer;

A connecting line is formed on the rough surface of the signal shielding layer, and the connecting line is used to transmit a touch driving signal or a touch detection signal.

For example, the step of preparing the signal shielding layer includes screen printing; the step of preparing the rough surface on the signal shielding layer includes a rubbing method; and the step of preparing the connecting line includes screen printing.

For example, the preparation method includes the following steps:

S1: forming a second electrode layer on the substrate 1 by a patterning process, the second electrode layer comprising a second connecting portion 2;

S2: forming a first insulating layer 3 on the substrate 1 forming the second connecting portion 2 by a patterning process;

S3: forming a first electrode layer on the substrate 1 forming the first insulating layer 3 by a patterning process, the first electrode layer including the sensing electrode 4 arranged in rows and columns and the first connecting portion 8, wherein the same row The adjacent plurality of sensing electrodes 4 are connected by the first connecting portion 8, and the plurality of sensing electrodes 4 adjacent to each other in the same row are connected by the second connecting portion 2 located at the second electrode layer; the first connecting portion 8 and the The second connecting portion 2 is insulated and crossed.

The above steps S1-S3 can adopt the method for fabricating the basic structure of the touch substrate in the prior art, and will not be further described herein.

S4: forming a second insulating layer and forming via holes and grooves in the second insulating layer;

As shown in FIG. 3, a second insulating layer 5 is coated on the substrate 1 on which the sensing electrodes 4 are formed, and then a negative photoresist (which may also be a positive photoresist) is applied through the two-tone mask. Exposing the photoresist, the reticle including a partial light-transmissive region corresponding to the via 9 and a light-transmitting region corresponding to the recess 10, thus controlling the exposure amount of the photoresist corresponding to the via 9 and the recess 10, The via 9 is etched to expose the sensing electrode 4 during etching, and only a portion of the second insulating layer 5 is etched at the recess 10 to form a recess 10, one end of the recess 10 is connected to the via 9 and the other end is The touch substrate is led out on the same side.

S5: forming a signal shielding layer 6 in the recess 10;

As shown in FIG. 4, the signal shielding layer 6 can be prepared by screen printing. The material of the signal shielding layer 6 can be selected from the SANTE series products produced by CIMA Nanotechnology.

S6: forming a rough surface on the signal shielding layer 6;

For example, a rough surface is formed on the signal shielding layer 6 by a rubbing method. As shown in FIG. 5, the signal shielding layer 6 can be rubbed with a roller having a rough surface to form a signal shielding layer 6 having a rough surface. It should be understood that the surface of the roller may be provided as a surface having a groove or a surface having a protrusion so that a surface having a groove or a protrusion may be formed on the signal shielding layer 6. surface. Thus, the signal shielding layer 6 acts to shield the external signal to prevent the external signal from affecting the sensing electrode 4, and can also perform light scattering through the rough surface to produce a shadowing effect.

S7: A connection line 7 is formed on the signal shielding layer 6.

For example, the connecting line 7 is formed by screen printing. Screen printing can be performed using nano silver paste to form the connecting line 7. A connecting line 7 having one end connected to the sensing electrode 4 and the other end drawn on the same side of the substrate is obtained by printing, and the connecting line 7 is prepared using a transparent conductive material. The nano silver material is used to prepare the connecting line, so that the square resistance of the connecting line 7 is relatively small.

It should be understood that other functional layers required for the preparation of the touch substrate can be continued, and will not be further described herein.

According to an embodiment of the invention, there is also provided a display device comprising the above touch substrate. The display device may be any product or component having a display function such as a touch screen, a liquid crystal display panel, an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.

The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

The present application claims the priority of the Chinese Patent Application No. 20151032, 946, filed on Jun. 15, 2015, the entire disclosure of which is hereby incorporated by reference.

Claims

A touch substrate includes a touch area, wherein

The touch area includes a first electrode layer and a second electrode layer which are insulated from each other on a substrate, and the first electrode layer includes a plurality of sensing electrodes arranged along rows and columns and a first connecting portion;

The second electrode layer includes a second connecting portion;

The sensing electrodes adjacent to each other in the same row are connected by a first connecting portion;

The sensing electrodes adjacent to each other in the same column are connected by a second connecting portion;

The first connecting portion and the second connecting portion are insulated and intersected;

a side of the first electrode layer remote from the second electrode layer is provided with a connection line connected to the sensing electrode, and the connection line is used for transmitting a touch driving signal or a touch detection signal; It is taken out on the same side of the touch substrate.
The touch panel of claim 1 , wherein an orthographic projection of the connecting line at the first electrode layer is located in the touch area.
The touch substrate of claim 2, wherein an orthogonal projection of the connecting line at the first electrode layer is between adjacent sensing electrodes.
The touch substrate of claim 1 further comprising a second insulating layer on a side of the first electrode layer remote from the second electrode layer, the connecting line passing through the second insulating layer A via corresponding to the position of the sensing electrode is connected to the sensing electrode.
The touch substrate of claim 1 , wherein each of the sensing electrodes is led out through a connecting line; and each of the sensing electrodes is led out through a connecting line.
The touch substrate of claim 4, wherein the second insulating layer is provided with a groove, and one end of the groove extends from the via hole to the same side of the touch substrate.
The touch substrate of claim 6, wherein an orthographic projection of the recess in the first electrode layer is between the sensing electrodes.
The touch substrate of claim 1, wherein the connecting line is made of a transparent conductive material.
The touch substrate of claim 8 wherein said transparent conductive material comprises a nanosilver material.
The touch panel of claim 6, wherein the bottom surface of the groove is provided with a signal screen Cover.
The touch substrate of claim 10, wherein the signal shielding layer has a rough surface.
The touch panel of claim 11, wherein a surface of the signal shielding layer has a groove or a protrusion.
The touch substrate of claim 10, wherein the connecting line is disposed on the signal shielding layer.
A method for preparing a touch substrate, comprising:

Forming a first electrode layer and a second electrode layer insulated from each other on the substrate, the first electrode layer including a plurality of sensing electrodes arranged in rows and columns and a first connecting portion, the second electrode layer including a second connecting portion, wherein the sensing electrodes are connected by a first connecting portion in the same row, and the sensing electrodes are connected in a same row by a second connecting portion, and the first connecting portion and the second connecting portion are insulated and intersected; and

Forming a connection line connected to the sensing electrode on a side of the first electrode layer away from the second electrode layer, wherein the connection line is used to transmit a touch driving signal or a touch detection signal, and the connection The lines are drawn on the same side of the touch substrate.
The method for preparing a touch substrate according to claim 14, further comprising:

Forming a second insulating layer on a side of the first electrode layer away from the second electrode layer and forming a via corresponding to the position of the sensing electrode in the second insulating layer;

Forming the connecting line on the second insulating layer,

The connecting line is connected to the sensing electrode through the via.
The method for preparing a touch substrate according to claim 14, further comprising:

Forming a second insulating layer on a side of the first electrode layer away from the second electrode layer, and forming a groove and a via hole corresponding to the position of the sensing electrode in the second insulating layer by using a two-tone mask One end of the groove extends from the via hole to the same side of the touch substrate;

Forming the connecting line in the groove,

The connecting line is connected to the sensing electrode through the via.
The method of manufacturing a touch substrate according to claim 16, further comprising:

Forming a signal shielding layer within the recess; and

The connecting line is formed on the signal shielding layer.
The method of manufacturing a touch substrate according to claim 17, wherein a surface of the signal shielding layer has a groove or a protrusion.
The method of manufacturing a touch substrate according to claim 16, wherein an orthogonal projection of the connecting line at the first electrode layer is between adjacent sensing electrodes.
A display device comprising the touch substrate of any of claims 1-13.