CN105912164A - Touch baseplate and preparation method and display device for same - Google Patents

Abstract

The invention provides a touch baseplate and a preparation method and a display device for the same, and belongs to the technical field of display. According to the invention, the problem that a connecting bridge in an existing touch baseplate can be broken easily and then influences touch effects of a touch display device can be solved. The touch baseplate provided by the invention is characterized in that a connecting bridge connected to a second sensing unit comprises at least one bending part as well as connecting positions located on two ends of the bending part, wherein the connecting bridge is not broken easily, and thus connection reliability can be enhanced. Meanwhile, when the touch baseplate is used in the display device, visibility of the connecting bridge can be reduced and effects of "shadow removal" are good because the connecting bridge is bent, and light refraction and reflection take place at the bending part. The touch baseplate provided by the invention is applicable to various display devices and is especially applicable to a flexible display device.

Description

A kind of touch substrate and its preparation method, display device

technical field

The invention belongs to the field of display technology, and in particular relates to a touch substrate, a preparation method thereof, and a display device.

Background technique

There are many ways to arrange the touch substrate in the touch display device, such as an in-cell touch substrate, an on-cell touch substrate, and the like. Among them, the on-cell touch substrate is favored due to its advantages of thinness and high touch accuracy.

The on-cell touch substrate can be divided into two categories: single layer on cell (SLOC) and multi-layer (Multi layer on cell, MLOC). Because the MLOC touch substrate can achieve high touch accuracy Compared with the SLOC touch substrate, the MOLC touch substrate has become the mainstream choice in capacitive touch display devices.

The on-cell touch substrate has multiple columns of first sensing units and multiple rows of second sensing units; where two adjacent first sensing units in each column of first sensing units are connected by a connecting bridge electrical connection, or two adjacent second sensing units in each row of second sensing units are electrically connected through a connecting bridge.

The inventors have found that at least the following problems exist in the prior art: the typical structure of the connecting bridge in the MLOC touch substrate is a diamond structure, as shown in Figure 1, the first sensing units 1 are connected through the connecting part of the same layer, The second sensing units 2 are connected by a horizontal (or vertical) connecting bridge 3, but when this structure is applied to flexible display products, due to the hardness of the metal itself, the breaking failure of the connecting bridge 3 is high, causing the entire The touch screen is not functioning properly. In addition, since the connecting bridge 3 is made of opaque metal, the "shadow elimination" effect of the connecting bridge is not good, which directly affects the performance of the touch substrate, and further affects the display effect of the touch display device.

Contents of the invention

Aiming at the problem that the connecting bridge in the existing touch substrate is easily broken and affects the touch effect of the touch display device, the present invention provides a touch substrate, a preparation method thereof, and a display device.

The technical solution adopted to solve the technical problems of the present invention is:

A touch substrate, comprising a plurality of first sensing units and a plurality of second sensing units, the first sensing units are on the same layer as the second sensing units, and the first sensing units adjacent to each other along a first direction The sensing units are connected through connecting parts on the same layer, and the second sensing units adjacent along the second direction are electrically connected through connecting bridges, and the connecting bridges overlap with the connecting parts and are provided between them. with insulating layer; among them,

The connection bridge includes at least one bent portion, and two ends of the bent portion are respectively electrically connected to two adjacent second sensing units.

Preferably, the bending angle of the bending portion is greater than 90°.

Preferably, the connection bridge further includes connection positions respectively connected to two adjacent second sensing units, and a plurality of bending parts are connected between the two connection positions.

Preferably, a plurality of connecting bridges are provided between the two adjacent second sensing units.

Preferably, the connecting bridge is made of metal material.

Preferably, the insulating layer covers the connecting bridge, and the connecting portion and at least part of the second sensing unit are disposed on the insulating layer.

Preferably, the second sensing unit is connected to the connecting bridge through a via hole in the insulating layer.

The present invention also provides a method for manufacturing the above-mentioned touch substrate, including the following steps: synchronously forming the first sensing unit, the second sensing unit, and the connecting portion, forming an insulating layer, and forming a connecting bridge.

Preferably, the above-mentioned method comprises the following steps in sequence:

form a connecting bridge;

form an insulating layer;

A first sensing unit, a second sensing unit, and a connecting portion are formed.

The present invention also provides a display device, comprising the above-mentioned touch substrate.

In the touch substrate of the present invention, the connecting bridge connecting the second sensing unit includes at least one bent portion, wherein the bent connecting bridge is not easy to break, which can improve the reliability of the connection. At the same time, after it is used in a display device, since the connecting bridge is bent, light will be refracted and reflected at the bent part, which can reduce the visibility of the connecting bridge, and the "shadow disappearing" effect is good. The touch substrate of the present invention is suitable for various display devices, especially for flexible display devices.

Description of drawings

FIG. 1 is a schematic structural diagram of an existing touch substrate;

FIG. 2 is a schematic structural diagram of a touch substrate according to Embodiment 1 of the present invention;

FIG. 3 is a schematic structural diagram of a touch substrate according to Embodiment 2 of the present invention;

FIG. 4 is another schematic structural view of the touch substrate according to Embodiment 2 of the present invention;

FIG. 5 is another structural schematic diagram of the touch substrate according to Embodiment 2 of the present invention;

FIG. 6 is another schematic structural view of the touch substrate according to Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of shielding of a touch substrate in the prior art;

FIG. 8 is a schematic diagram of the shielding of the touch substrate according to Embodiment 2 of the present invention;

9 is a schematic diagram of light propagation of the touch substrate according to Embodiment 2 of the present invention;

10 is a schematic diagram of the overall application of the touch substrate according to Embodiment 2 of the present invention;

11 is a schematic cross-sectional structure diagram of a touch substrate according to Embodiment 3 of the present invention;

Wherein, the reference signs are: 1. first sensing unit; 11. connecting part; 2. second sensing unit; 3. connecting bridge; 31. bending part; 32. connecting position; 4. insulating layer.

detailed description

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1:

This embodiment provides a touch control substrate, as shown in FIG. In the same layer, the first sensing units 1 adjacent along the first direction are connected through the connection part 11 of the same layer, and the second sensing units 2 adjacent along the second direction are connected through a connecting bridge 3 Electrically connected, the connecting bridge 3 overlaps with the connecting portion 11 with an insulating layer 4 therebetween; wherein,

The connecting bridge 3 includes at least one bent portion 31 , and the two ends 31 of the bent portion are respectively electrically connected to two adjacent second sensing units 2 .

In the touch substrate of this embodiment, the bent connecting bridge 3 is not easy to disconnect, which can improve the reliability of the connection. At the same time, after it is used in a display device, since the connecting bridge 3 is bent, light will be refracted and reflected at the bending part 31, which can reduce the visibility of the connecting bridge 3, and the effect of "shadow elimination" is good. The touch substrate of the present invention is suitable for various display devices, especially for flexible display devices.

Example 2:

This embodiment provides a touch substrate, as shown in FIG. 3-11 , including a plurality of first sensing units 1 and a plurality of second sensing units 2, the first sensing units 1 The units 2 are on the same layer, the first sensing units 1 adjacent along the first direction are connected through the connection part 11 of the same layer, and the second sensing units 2 adjacent along the second direction are connected through The bridge 3 is electrically connected, and the connecting bridge 3 overlaps with the connecting portion 11 with an insulating layer 4 therebetween; wherein,

The connecting bridge 3 includes at least one bent portion 31 , and the two ends 31 of the bent portion are respectively electrically connected to two adjacent second sensing units 2 .

Wherein, the first sensing unit may be a sensing unit through a sensing signal, and the second sensing unit may be a touch unit through a touch signal; or the first sensing unit may be a touch unit through a touch signal, and the second sensing unit may be a touch unit through a touch signal. The sensing unit is a sensing unit that transmits a sensing signal to realize touch control, and since it is already known, details will not be repeated here.

That is to say, in FIG. 2 , the first sensing unit 1 and the second sensing unit 2 are perpendicular to each other, and they may be formed synchronously, that is, the first sensing unit 1 and the second sensing unit 2 are on the same layer. Wherein the connecting portion 11 of the first sensing unit 1 is on the same layer as the first sensing unit 1, and the connecting bridge 3 for electrically connecting the second sensing unit 2 has a bent portion 31, and the bent connecting bridge 3 does not Easy to disconnect, can improve the reliability of the connection.

The touch screen of the present invention is suitable for various display devices, especially for flexible display devices, because flexible displays need to be bent and are more likely to break. Its application diagram is shown in Figure 10.

At the same time, after it is used in a display device, since the connecting bridge 3 is bent, light will be refracted and reflected at the bending part 31, which can reduce the visibility of the connecting bridge 3, and the effect of "shadow elimination" is good.

Preferably, the bending angle of the bending portion 31 is greater than 90°.

That is to say, the bent portion 31 obviously consists of two straight lines with a certain angle (not 0°) between them, and the included angle is the bending angle. Generally, the bending angle of the bending portion 31 depends on the arrangement of the pixels. The bending angle of the bending portion 31 is preferably an obtuse angle, so as not to cause electrostatic failure and avoid tip discharge.

Preferably, the connection bridge 3 further includes connection positions 32 respectively connected to two adjacent second sensing units, and a plurality of bent portions 31 are connected between the two connection positions 32 .

That is to say, as shown in FIG. 3 and FIG. 4 , a plurality of bending portions 31 can be used to connect two adjacent second sensing units 2 , that is, two or more bending portions 31 are connected to adjacent second sensing units 2 . The two sensing units 2 are connected, or each connecting bridge 3 includes a plurality of parallel bending parts 31. In this way, even if some of the bending parts 31 are broken, they can still conduct, which can greatly improve the reliability of the connection, especially Improve reliability when connecting flexible products. At the same time, the bending portion 31 in parallel can effectively reduce the resistance of the connecting bridge 3 and improve the driving capability of the IC.

In addition, the principle that increasing the number of bending parts 31 can reduce visibility is shown in Figure 9. After the number of bending parts 31 is increased and the arrangement is dense, the light will be refracted and reflected multiple times within a certain range, and the energy Consume more, so that it will not spread outwards, and then achieve the purpose of disappearing shadows.

Of course, multiple bends can also be connected in series, which is beneficial to further prevent breakage.

Preferably, a plurality of connecting bridges 3 are provided between the two adjacent second sensing units 2 .

That is to say, as shown in Fig. 5 and Fig. 6, two connecting bridges 3 are arranged between two adjacent second sensing units 2, and the bending of the bending portion 31 of the two connecting bridges 3 in Fig. 5 The angles are the same, and the bending angles of the bending parts 31 in Fig. 6 are opposite, so that during the long-term use of the product, even if one of the connecting bridges 3 is disconnected, the other connecting bridges 3 can also ensure normal touch performance and improve structural reliability. performance, enhance the life cycle.

Preferably, the connecting bridge 3 is made of metal material.

In the prior art, as shown in FIG. 7 , although the metal connection bridge 3 has good electrical conductivity, it is opaque, thereby blocking the light emitted by the pixels of the display panel. The bridge 3 is placed horizontally or vertically, so a part of the bridge 3 will completely overlap with the pixels in the corresponding area, resulting in the display of the overlapping area as a black dot, making the bridge 3 visible, so it can only be used with poor conductivity transparent material. However, in the present invention, the bending portion 31 of the connecting bridge 3 is placed reasonably obliquely, as shown in FIG. 8 , so that the area of the overlapping area is minimized, and the problem that the connecting bridge 3 is visible is overcome.

Preferably, the insulating layer 4 covers the connecting bridge 3 , and the connecting portion 11 and at least part of the second sensing unit 2 are disposed on the insulating layer 4 .

Preferably, as shown in FIG. 11 , the second sensing unit 2 is connected to the connection bridge 3 through a via hole.

Of course, if it is the other way around, the connection part 11 is on the bottom and the connection bridge 3 is on the top, which is also feasible, and will not be repeated here.

Example 3:

This embodiment provides a method for manufacturing a touch control substrate, including the following steps: forming a first sensing unit 1 and a second sensing unit 2 ; forming an insulating layer; and forming a connecting bridge 3 .

Preferably, the above method can also be shown in Figure 11: firstly form the connecting bridge 3; then form the insulating layer 4; finally form the first sensing unit 1 and the second sensing unit 2, and the connecting bridge 3 passes through the via hole It is connected with the second sensing unit layer 2.

Obviously, many changes can be made to the specific implementation of the above-mentioned embodiments; for example, the specific size and quantity of the connecting bridges can be changed according to the product size requirements of the display device.

Example 4:

This embodiment provides a display device, which includes any one of the above-mentioned touch-sensitive substrates. The display device may be any product or component with a display function such as a liquid crystal display panel, electronic paper, OLED panel, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. A touch substrate is characterized by comprising a plurality of first sensing units and a plurality of second sensing units, wherein the first sensing units and the second sensing units are on the same layer, the first sensing units adjacent to each other along a first direction are connected through connecting parts on the same layer, the second sensing units adjacent to each other along a second direction are electrically connected through connecting bridges, the connecting bridges are overlapped with the connecting parts, and insulating layers are arranged between the connecting bridges and the connecting parts; wherein,

the connecting bridge comprises at least one bending part, and two ends of the bending part are electrically connected with the two adjacent second sensing units respectively.

2. The touch substrate of claim 1, wherein the bending angle of the bending portion is greater than 90 °.

3. The touch substrate of claim 1, wherein the connecting bridge further includes connecting sites respectively connected to two adjacent second sensing units, and a plurality of bending portions are connected between the two connecting sites.

4. The touch substrate of claim 1, wherein a plurality of connecting bridges are disposed between two adjacent second sensing units.

5. The touch substrate of claim 1, wherein the connecting bridge is made of a metal material.

6. The touch substrate of claim 1, wherein the insulating layer covers the connecting bridge, and the connecting portion and at least a portion of the second sensing unit are disposed on the insulating layer.

7. The touch substrate of claim 6, wherein the second sensing unit is connected to the connecting bridge through a via hole in an insulating layer.

8. A method for manufacturing a touch substrate according to any one of claims 1 to 7, comprising the steps of:

the method includes the steps of forming a first sensing unit, a second sensing unit, a connecting portion, an insulating layer, and a connecting bridge in synchronization.

9. The method for manufacturing a touch substrate according to claim 8, wherein the touch substrate is the touch substrate according to claim 6, and the method sequentially comprises the following steps:

forming a connecting bridge;

forming an insulating layer;

a first sensing unit, a second sensing unit, and a connecting portion are formed.

10. A display device comprising the touch substrate according to any one of claims 1 to 7.