CN213780925U

CN213780925U - Flexible folding area reinforcing touch sensor and touch-control equipment

Info

Publication number: CN213780925U
Application number: CN202022903823.9U
Authority: CN
Inventors: 廖鑫; 李晓明
Original assignee: Shenzhen Huake Tek Co Ltd
Current assignee: Shenzhen Huake Tek Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-07-23
Anticipated expiration: 2030-12-04

Abstract

The utility model relates to a sensor field especially relates to a flexible folding region reinforcing touch sensor. The touch sensor comprises a base film and nano-silver conducting layers coated and solidified on two sides of the base film, patterns are etched on the nano-silver conducting layers, the nano-silver conducting layers comprise bending areas and non-bending areas, nano-silver leads are etched in the bending areas, and metal silver paste electrode leads are silk-screened in the non-bending areas. The utility model discloses a flexible folding regional reinforcing touch sensor adopts etching pattern on two-sided nanometer silver conductive film, at the regional silk screen printing metal silver thick liquid electrode lead wire of non-buckling of nanometer silver membrane, buckles regional etching nanometer silver lead wire, has improved touch sensor's resistant bending nature greatly. The utility model discloses a touch sensor can bear 50 ten thousand folding times, can also guarantee that each channel impedance is more even after buckling 30 ten thousand simultaneously.

Description

Flexible folding area reinforcing touch sensor and touch-control equipment

Technical Field

The utility model relates to a sensor field especially relates to a flexible folding region reinforcing touch sensor and touch-control equipment.

Background

The flexible OLED has the advantages of self-luminescence, high contrast, thin thickness, wide visual angle, high reaction speed and the like of the conventional OLED, and also has the characteristics of lighter and thinner volume and capability of reducing energy consumption. The flexible OLED can be widely applied to various products with display functions, such as tablet computers, televisions, mobile terminals, various wearable devices and the like.

With the wide application of touch technology in the display field, in order to realize the touch function of the flexible OLED display panel and maintain the flexibility of the flexible OLED display panel, a flexible touch sensor is proposed in the prior art. The design of the conventional touch sensor adopts a pattern etched on a conductive film, and a metal silver paste electrode lead is silk-screened at the edge of the conductive film to a touch chip, but the silver paste electrode lead is not resistant to bending, the resistance value of the silver paste electrode lead is rapidly increased due to the fragility of the silver paste electrode lead after bending, the resistance stability is worse, the bending radius is too small, and the silver paste electrode lead is easy to break, so that the touch failure is caused.

SUMMERY OF THE UTILITY MODEL

To above technical problem, the utility model provides a flexible folding region reinforcing touch sensor guarantees that touch sensor still has good touch-control effect and good channel impedance homogeneity after tens of thousands of folding.

The utility model adopts the following technical scheme:

the utility model provides a regional reinforcing touch sensor of flexible folding, includes the base film and coats the nanometer silver conducting layer of solidification in the base film both sides, and the pattern is etched on the nanometer silver conducting layer, and the nanometer silver conducting layer is including buckling regional and non-bending region, and at the regional etching nanometer silver lead wire of buckling, at the regional silk screen printing metal silver thick liquid electrode lead wire of non-bending.

Furthermore, the width of the nano silver lead in the bending area is less than 10 mm.

Further, the base film is a transparent polyimide base film.

Further, the touch sensor is folded 50 ten thousand times at a bending radius of 2mm and a frequency of bending 180 degrees every 1.3s, and the resistance change rate is less than 10%.

The utility model also provides a touch control equipment, including above-mentioned touch sensor.

The utility model discloses a regional reinforcing touch sensor of flexible folding adopts etching pattern on two-sided nanometer silver conductive film, at the regional silk screen printing metal silver thick liquid electrode lead wire of non-buckling of nanometer silver film, buckles regional etching nanometer silver lead wire, the utility model discloses adopting nanometer silver lead wire to replace silver thick liquid lead wire in the region of buckling, having solved the problem that traditional silver thick liquid lead wire is fragile and is not resistant to buckling under guaranteeing the even condition of channel impedance, solved the regional sensor distal end drive channel impedance that adopts nanometer silver lead wire can lead to obtaining of non-buckling simultaneously big, the inhomogeneous problem of channel impedance. The utility model discloses a touch sensor can bear 50 ten thousand folding times, can also guarantee that each channel impedance is more even after buckling 30 ten thousand simultaneously.

Drawings

For a clearer explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the touch sensor of the present invention;

in the figure: 1-bending area, 2-non-bending area, 3-nano silver lead and 4-metal silver paste electrode lead.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

A flexible folding region enhanced touch sensor is shown in figure 1 and comprises a base film and nano silver conducting layers coated and solidified on two sides of the base film, wherein patterns are etched on the nano silver conducting layers, each nano silver conducting layer comprises a bending region 1 and a non-bending region 2, a nano silver lead 3 is etched in the bending region 1, and a metal silver paste electrode lead 4 is silk-screened in the non-bending region 2.

The utility model discloses a flexible folding regional reinforcing touch sensor adopts the two-sided conducting film of individual layer, compares with traditional touch sensor, has got rid of the optical cement layer that plays the bonding effect in the double-layer conducting film, has reduced touch sensor's thickness, has also effectively avoidd the separation risk of OCA optical cement and conducting film in the folding process; meanwhile, the nano silver wire is adopted to replace the traditional indium tin oxide, and the excellent light transmittance and bending resistance of the nano silver wire are utilized to form the nano silver wire conductive film and etch the pattern and the electrode lead, so that the problem that the repeatedly folded indium tin oxide is easy to break is solved. Meanwhile, different lead modes are respectively adopted for a bending area and a non-bending area of the conductive film, the nano silver lead is etched in the bending area, and the metal silver paste electrode lead is silk-printed in the non-bending area, so that on one hand, the excellent bending performance of the nano silver lead is utilized in the bending area, and the problem that the traditional silver paste lead is fragile and cannot be bent is solved; on the other hand, the problems that the impedance of a far-end driving channel of a sensor product is large, the channel impedance is uneven and the touch effect is not excellent when all the nano silver leads are adopted are solved.

Specifically, in some embodiments of the present invention, the width of the nano-silver lead in the bending region is less than 10 mm. And (4) screen-printing metal silver paste on the edge area of the nano silver film, and avoiding a bending area during silver paste design. The lead wires in different forms in each area are ensured to have good lead-out effect.

Specifically, in some embodiments of the present invention, the base film is a transparent polyimide (CPI) base film. The transparent polyimide (CPI) base film has the excellent performance of the traditional PI, has the characteristics of high heat resistance, high reliability, flexibility resistance, low density, low dielectric constant, easiness in realizing the processing of a micro-pattern circuit and the like, and also overcomes the defect of light yellow or deep yellow color of the traditional PI film. The nano silver conductive layer has excellent light transmission and bending resistance, and provides possibility for realizing flexibility, a bendable display screen, a touch screen and the like. The utility model discloses at the two-sided coating nanometer silver ink preparation nanometer silver conducting film of transparent polyimide base film, have high heat-resisting, high transmissivity, resistant flexible, high deformation volume, repeated folding can not produce plastic deformation, and the impedance is stable.

The flexible folding region enhanced touch sensor of the present invention is described in detail above, and will be further described with reference to specific embodiments.

Example 1

The utility model provides a touch sensor, includes transparent polyimide base film and coating solidification in the nanometer silver conducting layer of base film both sides, the pattern is etched on the nanometer silver conducting layer, and the nanometer silver conducting layer is including buckling regional and non-bending region, and at the regional etching nanometer silver lead wire of buckling, at the regional silk screen printing metal silver thick liquid electrode lead wire of non-bending.

Comparative example 1

A touch sensor comprises a transparent polyimide base film and nano-silver conducting layers coated and solidified on two sides of the base film, wherein patterns are etched on the nano-silver conducting layers, and nano-silver electrode leads are arranged on the nano-silver conducting layers.

Comparative example 2

A touch sensor comprises a transparent polyimide base film and nano-silver conducting layers coated and solidified on two sides of the base film, patterns are etched on the nano-silver conducting layers, and silver paste is printed on the edges of the patterns to prepare electrode leads.

Comparative example 3

The utility model provides a touch sensor, includes first transparent polyimide base film, coating solidification in first nanometer silver conducting layer, OCA optical cement, the transparent polyimide base film of second in first base film one side in proper order, and coating solidification is in the second nanometer silver conducting layer of second base film one side, all etches pattern and nanometer silver electrode lead wire on first nanometer silver conducting layer and second nanometer silver conducting layer, and OCA optical cement is in the same place first base film and second base film.

To the utility model discloses embodiment 1 and the touch sensor that comparative example 1-3 preparation obtained carry out bending property test, and specific experimentation is as follows:

the touch module prepared in each embodiment and the comparative example is tested by using an XHS-ZW-03A model repeated bender manufactured by Shenzhen Xinhensen instruments Limited, and the test conditions are as follows: one end of a module to be tested is clamped by a clamping plate, one end of the clamping plate is a semicircular angle with the radius of 2mm, the other end of the clamping plate is clamped on a crank shaft, the module is repeatedly bent under the driving of a motor, and the bending frequency is once every 1.3 seconds. And recording the resistance change rate and the channel impedance uniformity of different touch sensors under different bending times. The results are shown in Table 1.

TABLE 1 bending contrast test results of different touch sensors

By table 1, the utility model provides an area reinforcing touch sensor has got rid of the OCA glue film, chooses transparent polyimide base film and silver nano wire for use to do the conducting layer, has effectively solved repeated folding Indium Tin Oxide (ITO) and silver thick liquid electrode lead wire and has not endured the easy fracture of buckling, the problem of OCA and conducting film separation, at the regional etching nanometer silver lead wire of buckling simultaneously, at the regional silk screen printing metal silver thick liquid electrode lead wire of non-buckling for the sensor of preparation can stand 50 ten thousand folding back still guarantees that the channel impedance is even. It can be seen through the test results of embodiment 1 and comparative examples 1-3 that the utility model discloses a regional reinforcing touch sensor has excellent collapsible performance, satisfies the demand of collapsible smart mobile phone and flexible electron device etc..

The present invention has been further described with reference to specific embodiments, but it should be understood that the specific description herein should not be construed as limiting the spirit and scope of the present invention, and that various modifications to the above-described embodiments, which would occur to persons skilled in the art after reading this specification, are within the scope of the present invention.

Claims

1. The utility model provides a regional reinforcing touch sensor of flexible folding, its characterized in that, include the base film and coat the solidification in the nanometer silver conducting layer of base film both sides, etching pattern on the nanometer silver conducting layer, the nanometer silver conducting layer is including the regional and the non-regional of buckling the regional etching nanometer silver lead wire of buckling the regional silk screen printing metal silver thick liquid electrode lead wire of non-buckling.

2. The flexible folded area enhanced touch sensor of claim 1, wherein the bending area nanosilver lead width is less than 10 mm.

3. The flexible fold region enhanced touch sensor of claim 1, wherein the base film is a transparent polyimide base film.

4. The flexible fold region enhanced touch sensor of claim 1, wherein the touch sensor is folded 50 ten thousand times at a frequency of 180 ° every 1.3s at a 2mm bend radius with a rate of change of resistance of less than 10%.

5. A touch device comprising the touch sensor of any one of claims 1-4.