CN211319187U

CN211319187U - Touch screen and electronic equipment

Info

Publication number: CN211319187U
Application number: CN201922021882.0U
Authority: CN
Inventors: 巫春晖; 朴成珉; 李培良; 余恭明
Original assignee: Nanchang OFilm Tech Co Ltd
Current assignee: Nanchang OFilm Tech Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-21
Anticipated expiration: 2029-11-21

Abstract

The application discloses touch-sensitive screen and electronic equipment includes: the sensor is provided with a bearing surface, one end of the bearing surface is provided with a bonding area, and the other end of the bearing surface is provided with a display area; the connecting component is at least partially attached to the bonding area and is electrically connected with the sensor in the bonding area; the cushion layer is attached to the bearing surface; the polaroid is attached to the surface, deviating from the bearing surface, of the cushion layer, and the orthographic projection of the polaroid on the bearing surface covers the bonding area and the display area. The utility model provides a touch-sensitive screen sets up the bed course on the loading face of sensor, with the attached surface that deviates from the loading face of bed course of polaroid, when can making the display area be realized the shading effect by the covering, coupling assembling is also covered simultaneously, play the guard action to the nation fixed area, and can reduce the degree of buckling of polaroid or avoid buckling of polaroid, the bubble that the department of buckling on the polaroid produced has just also been avoided leads to the fact the influence to the display effect of touch-sensitive screen, good display effect has.

Description

Touch screen and electronic equipment

Technical Field

The application relates to the technical field of display, in particular to a touch screen and electronic equipment.

Background

With the rapid development of electronic technology, touch screens are widely available in people's lives. At present, touch screens can be roughly divided into the following components: an external touch screen, an overlay surface touch screen, and an embedded touch screen. The external-hanging touch screen is produced by separately producing the touch screen and the liquid crystal display screen and then attaching the touch screen and the liquid crystal display screen together to form the liquid crystal display screen with the touch function. The touch screen mainly comprises a sensor, a circuit board and a polaroid. In the packaging process of the touch screen, the sensor and the circuit board need to be bonded. And because the polaroid laminating is on the sensor, therefore the position relation between polaroid and the circuit board has two kinds of mode of setting: one way is to place the polarizer away from the sensors in the bonding area. In this case, the polarizer covers only the edge of the display region, with a high risk of light leakage. And the circuit board in the bonding area is not shielded by the polaroid but exposed outside, so that the circuit board is easy to fall off or be damaged. The other method is to fold the edge of the polarizer and cover the edge of the polarizer on the circuit board in the bonding area. In this case, the thickness of the optical adhesive on the polarizer is relatively thin, so that the bent portion of the edge of the polarizer cannot be completely filled. Therefore, bubbles are easily generated at the bent portion, and the movement of the bubbles to the display area of the touch screen greatly affects the display effect of the touch screen.

Content of application

The application provides a touch-sensitive screen and electronic equipment, can avoid the display area light leak of touch-sensitive screen, play the guard action to the bonding district, and have good display effect.

According to an aspect of the present application, there is provided a touch screen including:

the sensor is provided with a bearing surface, one end of the bearing surface is provided with a bonding area, and the other end of the bearing surface is provided with a display area;

the connecting component is at least partially attached to the bonding area and is electrically connected with the sensor in the bonding area;

the cushion layer is attached to the bearing surface;

the polaroid is attached to the surface, deviating from the bearing surface, of the cushion layer, and the orthographic projection of the polaroid on the bearing surface covers the bonding area and the display area. This design can make the display area when being covered and realizing the shading effect, coupling assembling is also covered simultaneously, plays the guard action to bonding district to can reduce the degree of buckling of polaroid or avoid buckling of polaroid, make the touch-sensitive screen have good display effect.

According to some embodiments, one end of the polarizer is attached to the surface of the cushion layer away from the bearing surface, and the other end of the polarizer is attached to the surface of the connecting assembly away from the bearing surface. This design can play better fixed effect to coupling assembling, avoids coupling assembling to take place to drop or damage.

According to some embodiments, the thickness dimension of the backing layer in a direction perpendicular to the load-supporting surface is greater than or equal to the thickness dimension of the connection assembly. The design can avoid bending the polaroid to reduce the assembling steps of the touch screen.

According to some embodiments, one end of the connecting component is attached to the bonding area, and the other end of the connecting component extends in a direction away from the display area. The design can ensure that the connecting piece does not need to go around other routes, saves assembly positions and is more convenient to arrange.

According to some embodiments, the connecting assembly includes a conductive film layer attached to the bonding region and a circuit board at least partially attached to a surface of the conductive film layer away from the bonding region. The design can reduce the abrasion between the sensor and the circuit board and prolong the service life of the sensor and the circuit board.

According to some embodiments, the cushion layer and the connecting assembly have a gap therebetween in a direction parallel to the bearing surface. This design can reduce raw and other materials cost and reduce the equipment precision of touch-sensitive screen.

According to some embodiments, one end of the cushion layer abuts the connection assembly and the other end of the cushion layer is located in the display area. The design can ensure that the space in the touch screen is more compact without gaps, so that the light leakage of a display area is completely stopped, and the looseness of the connecting assembly is avoided.

According to some embodiments, the underlayer completely covers the display area. The design can comprehensively protect the display area, and the supporting effect on the polaroid is better.

According to some embodiments, the underlayer is an optical glue layer. The design can realize the connection and fixation of the cushion layer, the sensor and the polaroid without adopting an additional bonding layer or a connecting piece.

A second aspect of the present application also provides an electronic device, including:

any of the above touch screens. The electronic equipment of this design light leak can not appear, and display effect is good to coupling assembling is difficult for appearing droing or damaging, long service life in it.

The application provides a touch screen and electronic equipment, this touch screen includes sensor, coupling assembling, bed course and polaroid. The cushion layer is attached to the bearing surface of the sensor, the polaroid is attached to the surface of the cushion layer, which is far away from the bearing surface, and the orthographic projection of the polaroid on the bearing surface covers the bonding area and the display area. The utility model provides a touch-sensitive screen sets up the bed course on the loading face of sensor, with the attached surface that deviates from the loading face of bed course of polaroid, when can making the display area be realized the shading effect by the covering, coupling assembling is also covered simultaneously, play the guard action to the nation fixed area, and can reduce the degree of buckling of polaroid or avoid buckling of polaroid, the bubble that the department of buckling on the polaroid produced has just also been avoided leads to the fact the influence to the display effect of touch-sensitive screen, good display effect has.

Drawings

In order to more clearly illustrate the embodiments of the present application 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 application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a polarizer in a prior art;

FIG. 2 is a schematic view of a polarizer in a full section according to another prior art;

fig. 3 is a schematic view of an overall structure of a touch screen in the embodiment of the present application;

FIG. 4 is a schematic full-section view of a touch screen structure in a first embodiment of the present application;

FIG. 5 is a schematic view of a touch screen in a second embodiment of the present application;

FIG. 6 is a schematic full-section view of a touch screen structure in a third embodiment of the present application;

fig. 7 is a schematic full-section view of a touch screen structure in a fourth embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

As shown in fig. 1 to 2, the touch screen of the prior art mainly includes a sensor 100, a circuit board 220 and a polarizer 400. During the packaging process of the touch screen, the sensor 100 needs to be bonded to the circuit board 220. Bonding is a process of connecting the internal circuitry of sensor 100 to the package pins of circuit board 220 by gold wire, which allows the two to be in intimate contact and form a secure mechanical connection. Since the polarizer 400 is attached to the sensor 100, there are two setting methods for the positional relationship between the polarizer 400 and the circuit board 220: one way is to place the polarizer 400 away from the sensor 100 in the bonding area, as shown in FIG. 1. In this case, the polarizer 400 covers only the edge of the display region, with a high risk of light leakage. And the circuit board 220 in the bonding area is not shielded by the polarizer 400 but exposed outside, and is easy to fall off or be damaged. Another way is to bend the edge of the polarizer 400 and then cover it on the circuit board 220 in the bonding area, as shown in fig. 2. In this case, the thickness of the optical adhesive on the polarizer 400 is relatively thin, so that the bent portion of the edge of the polarizer 400 cannot be completely filled. Therefore, bubbles are easily generated at the bent portion, and the movement of the bubbles to the display area of the touch screen greatly affects the display effect of the touch screen.

In order to solve the above technical problem, referring to fig. 3 to 7, an embodiment of the present invention provides a touch panel 10, where the touch panel 10 includes a sensor 100, a connecting component 200, a pad layer 300, and a polarizer 400.

The sensor 100 is used to receive and process image data and convert the processing result into an electrical signal. The sensor 100 has a supporting surface 110, and the connecting component 200 and the polarizer 400 of the sensor 100 are disposed on the supporting surface 110. One end of the supporting surface 110 is provided with a bonding area 111, and the other end of the supporting surface 110 is provided with a display area 112. Bonding area 111 is an area for bonding connection of sensor 100 to connection assembly 200. To facilitate the bonding process, bonding region 111 is located at one end of sensor 100. The display area 112 is an area for displaying images on the sensor 100, and the display area 112 needs to be shielded in order to achieve a normal display effect of the sensor 100 and prevent light leakage of the backlight emitted by the backlight source. In order to avoid damage to the display area 112 due to the bonding process reaching the display area 112, the bonding area 111 and the display area 112 are not adjacent to each other, i.e., a certain gap needs to be left between the bonding area 111 and the display area 112.

In order to transmit the electrical signals in the sensor 100 to other components of the touch screen 10 through the circuit, a connection assembly 200 is required between the sensor 100 and other components. Therefore, the connection element 200 is at least partially attached to the bonding region 111, and the connection element 200 is electrically connected to the sensor 100 in the bonding region 111. The area of the bonding area 111, which is the area where the connecting component 200 is electrically connected to the sensor 100, is not particularly limited, so as to meet the normal use requirement and achieve the bonding normally.

The cushion layer 300 is attached to the supporting surface 110, and the cushion layer 300 is used for supporting the polarizer 400 and changing the relative position relationship between the polarizer 400 and the connecting assembly 200, so that the polarizer 400 and the connecting assembly 200 are located on different planes, and thus the connecting assembly 200 does not block the polarizer 400, the display area 112 is covered without avoiding the connecting assembly 200 in the bonding area 111, and light leakage at the edge of the display area 112 is avoided. An adhesive layer may be provided between the pad layer 300 and the sensor 100, and the pad layer 300 may be fixed to the sensor 100 by the adhesive layer. Other connecting members having a connecting function may be used to fix the mat 300.

The polarizer 400, which is called a polarizer, is an important optical functional material in the touch screen 10, and can control the polarization direction of a specific light beam. The polarizer 400 is attached to the surface of the cushion layer 300 opposite to the carrying surface 110. An adhesive layer may be disposed between the polarizer 400 and the pad layer 300, and the polarizer 400 may be fixed on the pad layer 300 through the adhesive layer. Other connectors having a connection function may be used to fix the polarizer 400. The orthographic projection of the polarizer 400 on the carrying surface 110 covers the bonding area 111 and the display area 112. The orthographic projection of the polarizer 400 on the supporting surface 110 refers to the projection of the polarizer 400 on the supporting surface 110 along a direction perpendicular to the supporting surface 110. The orthographic projection of the polarizer 400 on the supporting surface 110 covers the display area 112 to prevent light leakage of the touch screen 10. In order to prevent the connecting assembly 200 in the bonding area 111 from being exposed to the outside and from falling off or being damaged to affect the normal use of the touch screen 10, the orthographic projection of the polarizer 400 on the bearing surface 110 covers the bonding area 111, so as to protect the bonding area 111.

The touch screen 10 of the embodiment sets the pad layer 300 on the bearing surface 110 of the sensor 100, and attaches the polarizer 400 to the surface of the pad layer 300 away from the bearing surface 110, so that the display area 112 is covered to achieve the light shielding effect, and the connection assembly 200 is also covered at the same time, thereby protecting the bonding area 111, reducing the bending degree of the polarizer 400 or avoiding the bending of the polarizer 400, and avoiding the influence of bubbles generated at the bending part of the polarizer 400 on the display effect of the touch screen 10, thereby having a good display effect.

Referring to fig. 4, in the first embodiment of the present application, in order to achieve a better fixing effect on the connection assembly 200, one end of the polarizer 400 may be attached to the surface of the cushion layer 300 away from the supporting surface 110, and the other end of the polarizer 400 may be attached to the surface of the connection assembly 200 away from the supporting surface 110. In this embodiment, in the direction perpendicular to the supporting surface 110, the thickness of the cushion layer 300 is equal to the thickness of the connecting component 200, so that the polarizer 400 is directly attached to the connecting component 200, and the connecting and fixing effects on the connecting component 200 are better.

In the second embodiment of the present application, as shown in fig. 5, one end of the polarizer 400 is also attached to the surface of the cushion layer 300 away from the supporting surface 110, and the other end of the polarizer 400 is also attached to the surface of the connecting element 200 away from the supporting surface 110. The difference is that the thickness of the cushion layer 300 in the direction perpendicular to the supporting surface 110 is smaller than the thickness of the cushion layer 300 in the first embodiment of the present application, so that the polarizer 400 is bent at the position where the polarizer 400 is attached to the connecting assembly 200. However, due to the existence of the cushion layer 300, compared with the structure in the prior art, the bending degree is extremely low, and the optical adhesive carried on the polarizer 400 is enough to completely fill the bending part, so that no air bubble is generated at the bending part, and the display effect of the touch screen 10 is not affected.

In order to avoid bending the polarizer 400 to reduce the number of assembly steps of the touch screen 10, the thickness of the cushion layer 300 may be greater than or equal to the thickness of the connection assembly 200 in a direction perpendicular to the supporting surface 110. In a third embodiment of the present application, please refer to fig. 6, which shows a case that the thickness of the cushion layer 300 is greater than that of the connecting assembly 200, at this time, one end of the polarizer 400 is attached to the surface of the cushion layer 300 away from the supporting surface 110, so that the display area 112 is covered to achieve the light-shielding effect. A gap is formed between the other end of the polarizer 400 and the surface of the connecting component 200 away from the supporting surface 110, so as to prevent the connecting component 200 in the bonding region 111 from falling off or being damaged due to being exposed.

In the embodiment of the application, since the connection assembly 200 needs to be connected to other components of the touch screen 10 to transmit the electrical signal in the sensor 100, one end of the connection assembly 200 can be attached to the bonding region 111, and the other end of the connection assembly 200 extends in a direction away from the display region 112, so as to avoid the display region 112 and directly connect the sensor 100 to other components, and the connection assembly does not need to go around other routes, thereby saving the assembly position and facilitating the arrangement.

In an embodiment of the application, the connection assembly 200 includes a conductive film 210 and a circuit board 220, the conductive film 210 is attached to the bonding region 111, and the circuit board 220 is at least partially attached to a surface of the conductive film 210 away from the bonding region 111. That is, the circuit board 220 is connected to the sensor 100 through the conductive film 210, the conductive film 210 is composed of a film having a conductive function, and the conductive film 210 is additionally disposed between the circuit board 220 and the sensor 100, so that abrasion between the sensor 100 and the circuit board 220 can be reduced, and the service life of the sensor 100 and the circuit board 220 can be prolonged. Specifically, the Conductive Film layer 210 may be made of Anisotropic Conductive Film (ACF), which has a characteristic that the resistance characteristic in the direction perpendicular to the supporting surface 110 is significantly different from the resistance characteristic in the direction inside the supporting surface 110, and by using this characteristic, the Conductive particles can connect the electrodes between the sensor 100 and the circuit board 220 to conduct them, and at the same time, the short circuit caused by the conduction between the sensor 100 and the electrodes of the adjacent devices is avoided.

The cushion layer 300 is used for supporting the polarizer 400 and changing the relative position relationship between the polarizer 400 and the connecting assembly 200, so that in the embodiment of the present application, on the premise of satisfying this function, the occupied area of the cushion layer 300 can be reduced to reduce the raw material cost and reduce the assembly precision of the touch screen 10. After the area occupied by the cushion layer 300 is reduced, a gap is formed between the cushion layer 300 and the connecting assembly 200 along a direction parallel to the bearing surface 110. The size of the gap can be flexibly set according to actual conditions during the assembly process of the touch screen 10.

In order to make the space in the touch screen 10 more compact without gap, so as to completely stop the light leakage of the display area 112 and avoid the looseness of the connecting assembly 200, in the fourth embodiment of the present application, as shown in fig. 7, the area occupied by the pad layer 300 can be increased, one end of the pad layer 300 is abutted to the connecting assembly 200, and the other end of the pad layer 300 is located in the display area 112.

In the embodiment of the present application, in order to protect the display region 112 completely, the cushion layer 300 may completely cover the display region 112, and at this time, the cushion layer 300 has a better supporting effect on the polarizer 400, and the polarizer 400 may be completely attached to the cushion layer 300 to completely cover the display region 112.

The cushion layer 300 needs to be colorless and transparent, and has good light transmittance, so that the touch screen 10 has good display effect. The spacer 300 is further required to be connected and fixed to the sensor 100 and the polarizer 400, and therefore, the spacer 300 is further required to have good adhesion, and in the embodiment of the present application, the spacer 300 is an optical adhesive layer. Specifically, an OCA (optically Clear adhesive) optical adhesive can be adopted, and the OCA optical adhesive is a special adhesive and has the characteristics of being colorless and transparent, high in light transmittance, good in bonding strength, capable of being cured at room temperature or at intermediate temperature, small in curing shrinkage and the like. Moreover, the OCA optical adhesive is a double-sided adhesive without a base material, and has adhesiveness, and the connection and fixation of the cushion layer 300, the sensor 100 and the polarizer 400 can be realized without using an additional adhesive layer or a connecting piece.

The application also provides an electronic device. The electronic device comprises any of the above described touch screens 10. The electronic device can be any one of wearable devices such as a mobile phone, a tablet computer, a notebook computer, a personal digital assistant, an intelligent bracelet and an intelligent watch. The touch screen 10 can be used for displaying, processing or controlling information of the electronic device.

The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it is to be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the above terms may be understood by those skilled in the art according to specific situations.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A touch screen, comprising:

the connecting component is at least partially attached to the bonding area, and the connecting component is electrically connected with the sensor in the bonding area;

the cushion layer is attached to the bearing surface;

the polaroid is attached to the surface, deviating from the bearing surface, of the cushion layer, and the orthographic projection of the polaroid on the bearing surface covers the bonding area and the display area.

2. The touch screen of claim 1, wherein:

one end of the polaroid is attached to the surface of the cushion layer, which deviates from the bearing surface, and the other end of the polaroid is attached to the surface of the connecting component, which deviates from the bearing surface.

3. The touch screen of claim 1, wherein:

in the direction perpendicular to the bearing surface, the thickness dimension of the cushion layer is larger than or equal to that of the connecting component.

4. The touch screen of claim 1, wherein:

one end of the connecting component is attached to the bonding area, and the other end of the connecting component extends in the direction deviating from the display area.

5. The touch screen of claim 1, wherein:

the connecting assembly comprises a conductive film layer and a circuit board, the conductive film layer is attached to the bonding area, and at least part of the circuit board is attached to the surface of the conductive film layer, which deviates from the bonding area.

6. The touch screen of claim 1, wherein:

and a gap is formed between the cushion layer and the connecting assembly along the direction parallel to the bearing surface.

7. The touch screen of claim 1, wherein:

one end of the cushion layer is abutted to the connecting assembly, and the other end of the cushion layer is located in the display area.

8. The touch screen of claim 1,

the pad layer completely covers the display area.

9. The touch screen of claim 1,

the cushion layer is an optical adhesive layer.

10. An electronic device, comprising:

a touch screen as claimed in any one of claims 1 to 9.