CN209746529U - Touch screen - Google Patents

Abstract

The utility model discloses a touch screen, which increases the adhesive force of an insulating layer by arranging an ITO layer between the edge of a substrate and the insulating layer; the problem of solve is, current insulating layer adhesion on the base plate, because the adhesion problem, there is not enough adhesion between insulating layer and the base plate, the insulating layer and the base plate surface layering at latent base plate edge when falling or shaking, cause the inside functional line of base plate to damage the inefficacy.

Description

Touch screen

Technical Field

The utility model belongs to the technical field of the touch-sensitive display technique and specifically relates to a touch screen is related to.

Background

As the economy develops, the market places increasingly greater and higher demands on touch display products.

In the existing film structure touch screen product, when a film sensor is designed, in order to enhance the reliability of the product and prevent the risk of short circuit function failure caused by metal silver migration after potential reliability tests of GND silver paste electrode wires of silver paste circuits and adjacent function routing wires, insulating oil is printed on the silver paste routing wires for one more time by silk screen printing, the silver paste routing wires are covered by the insulating oil to improve the silver paste migration problem, but as the customer demands the product frame to be narrower and narrower, the partial structure is forced to be designed with the insulating oil covering area, in order to completely cover the silver paste traces, the insulating oil is extended to the edge of the film sensor, although this design can effectively cover the metal silver paste, but the problem of insulating oil adhesion exists in the application of the actual product, the viscosity of the insulating oil and the film surface is insufficient, when the film sensor falls or vibrates, the insulating oil at the edge of the potential film sensor is layered with the surface of the film, so that the functional circuit inside the film sensor is damaged and loses efficacy.

SUMMERY OF THE UTILITY MODEL

The utility model provides a touch screen, through set up the ITO layer between base plate edge and insulating layer, increase the adhesive force of insulating layer.

The above technical purpose of the utility model is realized through following technical scheme:

A touch screen comprises a substrate and an insulating layer positioned above the substrate; an ITO layer is arranged between the substrate and the insulating layer and used for strengthening the connection between the substrate and the insulating layer.

By adopting the structure, the ITO layer is arranged between the edge of the substrate and the insulating layer, the adhesive force of the insulating layer is increased, the connection stability between the insulating layer and the substrate is enhanced, and the functional circuit on the substrate is prevented from being damaged and losing efficacy.

Further optimization is that an electrode layer is arranged between the substrate and the insulating layer, and the electrode layer comprises a grounding part and a functional part; the grounding part is separated from the functional part through a laser trunk line.

The electrode layer is a silver paste electrode.

by adopting the structure, the screen printing silver paste serves as an electrode layer, is high in bonding strength, stable in electrical property and suitable for screen printing, and is suitable for serving as an electrode layer on a substrate.

Preferably, the grounding part is electrically connected with the ITO layer.

By adopting the structure, the ITO layer is a conductor, the grounding part of the silver paste is also a conductor, and the ITO layer is contacted with the grounding part, so that the grounding part and the ITO layer are grounded, and static electricity is led out in time.

Further preferably, the ITO layer is a monolithic piece of ITO.

By adopting the structure, the ITO layer is a whole piece of ITO, the area of the ITO layer electrically connected with the grounding part is larger, which is equivalent to increase the width or area of the grounding part, and the electrostatic protection is better.

The ITO layer is a plurality of independent ITO blocks, and the ITO blocks electrically connected with the grounding part are isolated from other ITO blocks by using laser dry etching lines.

By adopting the structure, part of customers have requirements on the size of the grounding part of the touch screen, and the ITO blocks electrically connected with the grounding part are isolated from other ITO blocks by using the laser dry etching line, so that the requirements of the customers are met.

It is further optimized that the gap between the independent ITO blocks is not more than 0.1 mm.

By adopting the structure and adopting the space less than 0.1mm, the insulating oil covers the ITO as much as possible instead of the film PET, and the contact area between the insulating oil and the ITO can be increased by reducing the space under the condition that the technological capability is met.

The touch screen further comprises a cover plate, and the cover plate is fixedly connected above the insulating layer through optical OCA glue.

To sum up, the utility model discloses following beneficial effect has:

The utility model provides a touch screen, which increases the adhesive force of an insulating layer by arranging an ITO layer between the edge of a substrate and the insulating layer; the problem of solve is, current insulating layer adhesion on the base plate, because the adhesion problem, there is not enough adhesion between insulating layer and the base plate, the insulating layer and the base plate surface layering at latent base plate edge when falling or shaking, cause the inside functional line of base plate to damage the inefficacy.

Drawings

Fig. 1 is a schematic diagram of a touch screen in the prior art.

Fig. 2 is a schematic diagram of a touch screen in an embodiment of the present invention.

Fig. 3 is a schematic diagram of a touch screen according to an embodiment of the present invention, which is mainly used to illustrate a separated ITO block.

Fig. 4 is a schematic diagram of a touch panel according to an embodiment of the present invention, which is mainly used to illustrate a whole ITO.

Fig. 5 is a schematic diagram of a monolithic ITO and substrate according to an embodiment of the present invention.

Fig. 6 is a schematic diagram of an embodiment of the present invention in which the ITO layer is separated into ITO blocks.

Fig. 7 is a schematic diagram of a monolithic ITO lap-jointed to the grounding portion of the electrode layer according to an embodiment of the present invention.

Fig. 8 is a schematic diagram of an embodiment of the present invention in which the ITO layer is separated into a plurality of ITO blocks overlapping with the grounding portion of the electrode layer.

Reference numerals: 1. a substrate; 2. An insulating layer; 3. An electrode layer; 301. a ground part; 302. a functional section; 4. a touch pattern layer; 5. an ITO layer; 501. a separate ITO block; 502. a whole piece of ITO; 6. laser dry etching lines; 7. cutting the line.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following touch screen of the prior art and the touch screen of the present invention are further described in detail with reference to the following embodiments and the accompanying drawings.

The prior art is as follows: as shown in fig. 1, in the conventional touch screen product, in order to enhance the reliability of the product and prevent the risk of short circuit function failure caused by metal silver migration after a potential reliability test performed by a grounding portion 301 of an electrode layer 3 and an adjacent functional portion 302, an insulating layer 2 is multi-printed on the electrode layer 3, the insulating layer 2 is used to cover the electrode layer 3 to improve the silver paste migration problem, but as the customer requests the product frame to be narrower and narrower, and the partial structure is forced to completely cover the electrode layer 3 when designing the coverage area of the insulating layer 2, the insulating layer 2 is extended to the edge of the substrate 1, although the design can effectively cover the electrode layer 3, the problem of adhesion of the insulating layer 2 exists when the actual product is applied, the film surface adhesion between the insulating layer 2 and the substrate 1 is insufficient, and the insulating layer 2 at the edge of the potential substrate is layered with the surface of the substrate 1 when falling, causing damage and failure of functional circuits inside the substrate 1.

Example 1

As shown in fig. 2, a touch screen includes a substrate 1, an insulating layer 2 over the substrate 1; an ITO layer 5 is arranged between the substrate 1 and the insulating layer 2 and used for strengthening the connection between the substrate 1 and the insulating layer 2. By arranging the ITO layer 5 between the edge of the substrate 1 and the insulating layer 2, the adhesive force of the insulating layer 2 is increased, the connection stability between the insulating layer 2 and the substrate 1 is enhanced, and the functional circuit on the substrate 1 is prevented from being damaged and losing efficacy.

Preferably, an electrode layer 3 is further provided between the substrate 1 and the insulating layer 2, and the electrode layer 3 includes a grounding portion 301 and a functional portion 302; the grounding portion 301 and the functional portion 302 are isolated by the laser stem etching line 6, so that the grounding portion 301 and the functional portion 302 of the electrode layer 3 cannot be electrically connected, and the normal operation of the electrode layer 3 is not affected.

Further preferably, the electrode layer 3 is a silver paste electrode. The screen printing silver paste serves as an electrode layer, is high in bonding strength, stable in electrical property and suitable for screen printing, and is suitable for serving as the electrode layer 3 on the substrate 1.

Preferably, the insulating layer 2 is insulating oil; the substrate 1 is a film-structured substrate; the functional part 302 of the electrode layer 3 is electrically connected with the touch pattern layer 4; the touch pattern layer 4 and the ITO layer 5 can be manufactured in the same layer, and the process flow is saved.

Preferably, in the actual production process, the insulating layer 2 and the ITO layer 5 may exceed the edge of the substrate 1, and the ITO layer 5 and the insulating layer 2 outside the substrate 1 are cut off along the cutting line 7 of the edge of the substrate profile when the profile is cut, so that the influence of the deviation tolerance is reduced, and the profile of the edges of the ITO layer 5, the insulating layer 2 and the substrate 1 is flush.

preferably, the grounding portion 301 is electrically connected to the ITO layer 5. The ITO layer 5 is a conductor, the grounding part 301 of the silver paste is also a conductor, and the ITO layer 5 is in contact with the grounding part 301, so that the grounding part 301 and the ITO layer 5 are both grounded, and static electricity is led out in time. It is easy to understand that the grounding portion 301 can directly overlap with the ITO layer 5, so as to achieve electrical connection more conveniently.

Example 2

In this embodiment, the ITO layer 5 of the present invention is explained based on embodiment 1.

As shown in fig. 3-4, the ITO layer 5 is a monolithic piece of ITO 502. The ITO layer 5 is a whole ITO layer 502, and the area of the ITO layer 5 electrically connected to the grounding portion 301 is larger, which is equivalent to increase the width or area of the grounding portion 301, and the electrostatic protection is better.

Preferably, the ITO layer 5 is a plurality of independent ITO blocks 501, and an ITO block electrically connected to the ground portion 301 is isolated from other ITO blocks by using the laser dry etching line 6. Part of customers have requirements on the size of the grounding part of the touch screen, and the ITO blocks electrically connected with the grounding part are isolated from other ITO blocks by using the laser dry etching line 6, so that the requirements of the customers are met. It is understood that the laser dry etching line 6 can preferably realize the separation of the ITO layer 5 into the ITO block 501 and the functional portion 301 and the ground portion 302 of the isolation electrode layer 3, but is not limited to the laser dry etching line, and other processes capable of realizing the same function are also possible.

Preferably, the gap between the individual ITO blocks 501 is not greater than 0.1 mm. The distance smaller than 0.1mm is adopted, so that the insulating layer 2 covers the ITO layer 5 as much as possible instead of the substrate 1, and under the condition that the process capability is met, the contact area between the insulating layer 2 and the ITO layer 5 is favorably increased by reducing the distance.

Etching process of the ITO layer: as shown in fig. 5-8, the substrate 1 with the ITO layer 5 is exposed and developed to form a corresponding pattern, and then silver paste is screen-printed thereon, and the electrode layer 3 is disposed; then, the grounding part 301 and the functional part 302 of the electrode layer 3 are isolated through the laser dry etching line 6, the ITO layer 5 is separated into a plurality of independent ITO blocks 501, or the ITO layer 5 is not separated, and a whole ITO501 is reserved; an insulating layer 2 is arranged on the electrode layer 3, and the insulating layer 2 extends to an ITO layer 5 positioned at the edge of the substrate 1.

Further preferably, the touch screen further comprises a cover plate (not shown in the figure), and the cover plate is fixedly connected above the insulating layer 2 through an optical OCA adhesive (not shown in the figure).

The utility model provides a touch screen, which increases the adhesive force of an insulating layer by arranging an ITO layer between the edge of a substrate and the insulating layer; the problem of solve is, current insulating layer adhesion on the base plate, because the adhesion problem, there is not enough adhesion between insulating layer and the base plate, the insulating layer and the base plate surface layering at latent base plate edge when falling or shaking, cause the inside functional line of base plate to damage the inefficacy.

The above specific embodiments are merely illustrative of the present invention, and are not intended to limit the present invention, and those skilled in the art can make modifications of the present embodiments and the embodiments without inventive contribution as required after reading the present specification, but all the modifications are protected by patent law within the scope of the claims of the present invention.

Claims (8)

1. The touch screen is characterized by comprising a substrate and an insulating layer positioned above the substrate; an ITO layer is arranged between the substrate and the insulating layer and used for strengthening the connection between the substrate and the insulating layer.

2. The touch screen of claim 1, wherein an electrode layer is further disposed between the substrate and the insulating layer, and the electrode layer includes a grounding portion and a functional portion; the grounding part is separated from the functional part through a laser trunk line.

3. The touch screen of claim 2, wherein the electrode layer is a silver paste electrode.

4. The touch panel of claim 2, wherein the ground is electrically connected to the ITO layer.

5. The touch screen of claim 1, wherein the ITO layer is a monolithic piece of ITO.

6. The touch screen of claim 1, wherein the ITO layer is a plurality of independent ITO blocks, and an ITO block electrically connected to the ground is isolated from other ITO blocks.

7. The touch screen of claim 6, wherein the gap between the individual ITO bumps is no greater than 0.1 mm.

8. The touch screen of claim 1, further comprising a cover plate fixedly attached over the insulating layer by an optical OCA glue.