CN210402316U

CN210402316U - Touch screen and mobile terminal

Info

Publication number: CN210402316U
Application number: CN201921693398.6U
Authority: CN
Inventors: 熊芳芳
Original assignee: Jiangxi Lianchuang Electronic Co Ltd
Current assignee: Jiangxi Lianchuang Electronic Co Ltd
Priority date: 2019-10-10
Filing date: 2019-10-10
Publication date: 2020-04-24
Anticipated expiration: 2029-10-10

Abstract

The utility model discloses a touch screen and a mobile terminal, wherein the touch screen comprises a flexible circuit board, a transparent substrate, a first optical adhesive layer, a first conductive film, a second optical adhesive layer and a second conductive film which are sequentially stacked from top to bottom; the flexible circuit board comprises a first gold finger part and a second gold finger part, wherein the first binding region is arranged on one surface, facing the transparent substrate, of the first conductive film, the second binding region is arranged on one surface, facing the transparent substrate, of the second conductive film, the first binding region and the second binding region are arranged in a staggered mode, and the flexible circuit board comprises the first gold finger part and the second gold finger part, which are bound together with the first binding region, and the second gold finger part is bound together with the second binding region; be equipped with the gasket of insulating material between second golden finger portion and the transparent substrate, the gasket is equipped with the viscose layer towards the one side of second golden finger portion, and the sum of the thickness of gasket and viscose layer is not less than the interval between second golden finger portion and the transparent substrate. The utility model discloses can solve because of there is the hanging oneself from the sky layer and lead to the relatively poor problem of reliability between binding position and the apron of lower floor's ITO.

Description

Touch screen and mobile terminal

Technical Field

The utility model relates to an electronic equipment technical field especially relates to a touch-sensitive screen and mobile terminal.

Background

The touch screen is an inductive liquid crystal display device capable of receiving input signals such as a touch head, and is the simplest, convenient and natural man-machine interaction mode at present. The touch screen is endowed with a brand-new appearance for multimedia, and is a brand-new attractive multimedia interaction device, and a plurality of mobile terminals such as mobile phones and tablet computers use the touch screen.

Touch screens mainly include resistive touch screens and capacitive touch screens, wherein capacitive touch screens are the trend of development today. Capacitive touch screens are generally divided into single-layer inductive capacitive touch screens and double-layer inductive capacitive touch screens, and touch screens with GFF structures as typical double-layer inductive capacitive touch screens have a high market share. The GFF structure is a CG (cover glass) + Film structure, in which CG usually uses transparent glass and Film usually uses ITO thin Film.

In the related technology, double layers of ITO in a Touch screen with a GFF structure are respectively responsible for driving and sensing functions, signals are led out from the two layers of ITO through 1 FPC (flexible printed circuit), and the FPC is respectively bound with binding positions on the two layers of ITO through ACF (anisotropic conductive film) to form a Touch Sensor. Because the double layers of ITO are not positioned in the same layer, the bound Touch Sensor is attached to the cover plate and positioned on the ITO on the upper layer, the binding position of the bound ITO can be tightly pressed by the cover plate and the Touch Sensor, and the contact reliability is good; however, a suspended layer is formed between the binding position of the ITO positioned on the lower layer and the cover plate, so that the reliability of the position is poor, and under the environment of high temperature, high humidity or cold and hot impact, the ITO is easy to loosen or float, so that the channel is broken, and high reliability risk exists.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a touch-sensitive screen to there is the hanging up layer and leads to the relatively poor problem of reliability because of there being the hanging up layer between binding position of lower floor's ITO and the apron.

A touch screen comprises a flexible circuit board, and a transparent substrate, a first optical adhesive layer, a first conductive film, a second optical adhesive layer and a second conductive film which are sequentially stacked from top to bottom;

one surface, facing the transparent substrate, of the first conductive film is provided with a first binding region, one surface, facing the transparent substrate, of the second conductive film is provided with a second binding region, the first binding region and the second binding region are arranged in a staggered mode, and the flexible circuit board comprises a first gold finger part bound with the first binding region and a second gold finger part bound with the second binding region;

second golden finger portion with be equipped with insulating material's gasket between the transparent substrate, the gasket orientation the one side of second golden finger portion is equipped with the viscose layer, the gasket with the sum of the thickness on viscose layer is not less than second golden finger portion with interval between the transparent substrate.

According to the utility model provides a Touch-sensitive screen, through add the gasket between second gold finger portion and the transparent substrate on flexible circuit board, the gasket is established on second gold finger portion through the viscose layer subsides of bottom, and the thickness of gasket and viscose layer sum is not less than the interval between second gold finger portion and the transparent substrate, and thus, when Touch Sensor and transparent substrate laminate mutually, the gasket can be fine to this unsettled space of binding the position (also be the binding position of lower floor's ITO among the conventional art) compensate, cover behind the transparent substrate, this binding position can be compressed tightly, guarantee the contact effect, the reliability is promoted, and the gasket is insulating material, can not influence product electric property function.

In addition, according to the utility model provides a touch-sensitive screen can also have following additional technical characterstic:

further, the area of the pad is smaller than the area of the second binding region.

Further, the pad is located in the middle of the second golden finger part.

Further, the gasket is made of PET.

Further, the transparent substrate adopts a transparent glass cover plate.

Further, the first conductive film and the second conductive film are both flexible conductive films.

Further, the flexible conductive film is an ITO thin film.

Furthermore, the first optical adhesive layer and the second optical adhesive layer are both OCA.

Another object of the present invention is to provide a mobile terminal using the above touch screen.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a stacked structure of a touch panel according to a first embodiment of the present invention;

fig. 2 is a schematic partial front view structure diagram (not including a transparent substrate) of a touch panel according to a first embodiment of the present invention.

Detailed Description

In order to make the objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Several embodiments of the invention are given in the accompanying drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, a touch panel according to a first embodiment of the present invention includes a flexible circuit board 11, and a transparent substrate 12, a first optical adhesive layer 13, a first conductive film 14, a second optical adhesive layer 15, and a second conductive film 16, which are sequentially stacked from top to bottom.

The transparent substrate 12, i.e., the cover plate, may be a transparent glass cover plate, a transparent resin plate, or the like, and specifically, in the present embodiment, the transparent substrate 12 is a transparent glass cover plate.

The first conductive film 14 and the transparent substrate 12 are bonded together through the first optical adhesive layer 13, and usually, only one turn of the first optical adhesive layer 13 is needed to bond the first conductive film 14 and the transparent substrate 12 together. The first conductive film 14 is a flexible conductive film, and may be at least one of an ITO film, a nano silver wire film, or a metal mesh film. Specifically, in the present embodiment, the first conductive film 14 is an ITO thin film. The first optical adhesive layer 13 is OCA.

The first conductive film 14 and the second conductive film 16 are bonded together by a second optical adhesive layer 15, and the second conductive film 16 is a flexible conductive film, and may be at least one of an ITO film, a nano-silver wire film, or a metal mesh film. Specifically, in this embodiment, the second conductive film 16 is also an ITO thin film. The second optical adhesive layer 15 is OCA.

The above results in a conventional GFF structure.

A first bonding region 141 is disposed on a surface of the first conductive film 14 facing the transparent substrate 12, a second bonding region 161 is disposed on a surface of the second conductive film 16 facing the transparent substrate 12, the first bonding region 141 and the second bonding region 161 are arranged in a staggered manner, and the flexible circuit board 11 includes a first gold finger portion 111 bonded to the first bonding region 141 and a second gold finger portion 112 bonded to the second bonding region 161. Specifically, the first gold finger part 111 and the first bonding area 141 are bonded together by ACF, and similarly, the second gold finger part 112 and the second bonding area 161 are bonded together by ACF.

Second golden finger portion 112 with be equipped with insulating material's gasket 17 between the transparent substrate 12, gasket 17 orientation the one side of second golden finger portion 112 is equipped with the viscose layer, gasket 17 with the sum of the thickness on viscose layer is not less than second golden finger portion 112 with interval between the transparent substrate 12, the thickness of gasket 17 (including the viscose layer) is slightly thicker than unsettled height promptly. Preferably, the thickness of the spacer 17 (including the adhesive layer) is slightly greater than the flying height by 5 um. The spacer 17 may be made of PET.

Specifically, the area of the pad 17 is smaller than the area of the second binding region 161, so that thickness interference can be avoided. Preferably, the pad 17 is located at the middle position of the second gold finger part 161.

According to the touch screen provided by the embodiment, the gasket 17 is additionally arranged between the second gold finger part 112 and the transparent substrate 12 on the flexible circuit board 11, the gasket 17 is attached to the second gold finger part 112 through the bottom adhesive layer, and the sum of the thicknesses of the gasket 17 and the adhesive layer is not smaller than the distance between the second gold finger part 112 and the transparent substrate 12, so that when the TouchSensor is attached to the transparent substrate 12, the gasket 17 can well compensate the suspended gap of the binding position (namely the binding position of the lower layer ITO in the traditional technology), after the transparent substrate 12 is covered, the binding position can be pressed, the contact effect is ensured, the reliability is improved, and the gasket 17 is made of an insulating material and cannot influence the electrical function of a product.

Furthermore, a second embodiment of the present invention provides a mobile terminal, which at least includes the touch screen of the first embodiment, and the mobile terminal is, for example, a mobile phone or a tablet computer.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a touch screen, includes flexible circuit board to and from the top down transparent substrate, first optics glue film, first conductive film, second optics glue film, the second conductive film that stacks gradually the setting, its characterized in that:

2. The touch screen of claim 1, wherein the area of the pad is smaller than the area of the second binding region.

3. The touch screen of claim 2, wherein the pad is located at a middle position of the second gold finger portion.

4. The touch screen of claim 1, wherein the spacer is made of PET.

5. The touch screen of claim 1, wherein the transparent substrate is a transparent glass cover plate.

6. The touch screen of claim 1, wherein the first and second conductive films are both flexible conductive films.

7. The touch screen of claim 6, wherein the flexible conductive film is an ITO film.

8. The touch screen of claim 1, wherein the first optical adhesive layer and the second optical adhesive layer are both OCAs.

9. A mobile terminal characterized by comprising a touch screen according to any one of claims 1 to 8.