CN113467120B

CN113467120B - Electronic equipment

Info

Publication number: CN113467120B
Application number: CN202010238453.3A
Authority: CN
Inventors: 张俊彪; 王朝; 罗伟
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2023-05-16
Anticipated expiration: 2040-03-30
Also published as: CN113467120A

Abstract

The application relates to the technical field of electronic products, in particular to electronic equipment, which comprises a flexible circuit board, a liquid crystal display and a touch panel, wherein the flexible circuit board, the liquid crystal display and the touch panel are sequentially arranged along the thickness direction, and the flexible circuit board comprises a first part, a second part and a third part; in a thickness direction, the first portion is disposed above the liquid crystal display, the third portion is disposed between the touch panel and the liquid crystal display, and the second portion is bent to connect the first portion and the third portion; the flexible circuit board further comprises a conductive layer, wherein the conductive layer at least covers the second part, the conductive layer is provided with an opening, and the opening covers the second part. By utilizing the electronic equipment provided by the application, the problem of static electricity damage to the liquid crystal display line walking can be solved, and meanwhile, the stress of a bending area is reduced, so that the falling-off of the touch panel is avoided.

Description

Electronic equipment

Technical Field

The application relates to the technical field of electronic products, in particular to electronic equipment.

Background

Among the existing electronic products, electronic products having a touch panel are popular, and the operation of the touch panel requires an electrical connection of a liquid crystal display to control the implementation. In general, a flexible circuit board disposed on a liquid crystal display device carries traces thereof to control the operation of the touch panel, and in order to complete the arrangement of the traces, a portion of the flexible circuit board needs to be bent 180 degrees so that a portion is located in a frame gap between the touch panel and the liquid crystal display device. In the structural cooperation, the surface of the flexible circuit board is subjected to static electricity, static electricity entering along the gap can be beaten on the wiring of the flexible circuit board at the bending part, so that the circuit of the flexible circuit board is damaged, and in order to solve the problem of static electricity damage, copper is paved on the surface of the flexible circuit board in a large area to prevent static electricity. However, this method may cause excessive bending stress at the bending portion of the flexible circuit board, and may easily deform to lift up the touch panel, thereby resulting in the touch panel becoming degummed.

Disclosure of Invention

An object of the present application is to provide an electronic device, which can solve the problem of static electricity damage to a liquid crystal display wiring and reduce stress of a bending region so as to avoid falling off of a touch panel.

The application provides an electronic device, which comprises a flexible circuit board, a liquid crystal display and a touch panel, wherein the flexible circuit board, the liquid crystal display and the touch panel are sequentially arranged along the thickness direction, and the flexible circuit board comprises a first part, a second part and a third part;

in a thickness direction, the first portion is disposed above the liquid crystal display, the third portion is disposed between the touch panel and the liquid crystal display, and the second portion is bent to connect the first portion and the third portion;

the flexible circuit board further comprises a conductive layer, wherein the conductive layer at least covers the second part, the conductive layer is provided with an opening, and the opening covers the second part.

Through adopting the structural fit form that this kind of individual layer flexible circuit board buckled to realize the overall arrangement of flexible circuit board wiring, the overall arrangement is comparatively reasonable, practices thrift space utilization, simultaneously through at least on the part cover conducting layer of buckling is in order to prevent static from beating the flexible circuit board wiring of buckling from the gap, simultaneously, through the trompil of setting, guarantee when the conducting layer can play to prevent static to drive into on the wiring of the second part of buckling, furthest's reduction the bending stress of second part, reduce the restoring force after the second part is buckled to avoid touch panel's droing.

In one possible design, the openings are two or more, and the openings are sequentially arranged.

The number, the size, the shape, the arrangement form and the like of the holes can be adaptively adjusted according to actual use requirements, so that static electricity can not pass through to damage wiring while bending stress can be reduced by the holes.

In one possible design, the distance between adjacent openings is less than or equal to 5mm. With this arrangement, the conductive layer portion between the adjacent openings forms a conductive portion for temporarily attracting static electricity moving toward the opening position to the conductive portion to change the moving direction of the static electricity, thereby preventing the static electricity from passing through the openings.

In one possible design, the sum of the areas of the openings in the second portion is fifty to eighty percent of the surface area of the second portion.

The structure of the touch panel is characterized in that the structure of the touch panel is provided with a plurality of holes, the holes are formed in the holes, and static electricity is prevented from penetrating through the holes and being beaten to the structure of the wiring.

In one possible design, the openings are uniformly arranged perpendicular to the thickness direction. In this direction, the trompil is arranged in order, and this kind of arrangement mode simple structure to the overall arrangement of this kind of even structure can be when avoiding static to pass from the trompil, the processing of being convenient for.

In one possible design, the maximum distance between the inner walls of the openings is less than 3mm in a direction perpendicular to the thickness direction. By limiting the maximum distance of the inner wall of the opening in this direction, static electricity is prevented from passing through the opening.

In one possible design, the openings are uniformly arranged along the bending direction of the second portion. For such openings, the maximum distance between the inner walls of the openings needs to be less than 1mm along the direction of arrangement of the openings to ensure a good effect of blocking static electricity from passing through the openings.

In a possible design, the conductive layer covers the first portion, the second portion and the third portion, the opening covering the second portion extending at least to the first portion and/or the third portion. The bending resistance of the first part and the third part can be reduced when the second part is bent, so that the bending resistance of the first part and the third part is reduced, the bending stress of the second part is correspondingly reduced, and the better effect of reducing the bending stress is achieved.

In one possible design, the conductive layer is adhesively connected to the first, second and third portions, respectively. The covering effect of the conductive layer is ensured, and local tilting is avoided.

In one possible design, the openings are square holes, and the distances between adjacent openings are the same along the width direction of the square holes. Through the setting in the square hole of structure even stable, make form banding electrically conductive portion between the adjacent square hole, arrange evenly, make no matter from which angle static that motion comes, can all be by banding electrically conductive portion attraction before beating the direction downthehole to derive static.

In one possible design, the width of the square holes is 1mm along the width direction of the square holes, and the distance between adjacent square holes is 5mm.

In one possible design, the conductive layer is copper foil. The copper foil with the conductive function can be made thinner, so that the bending stress can be reduced to the maximum extent, and the effect is better.

In one possible design, the third portion is fixedly connected to the housing of the liquid crystal display by a binding process. So as to avoid the third part from being influenced by bending force to generate motion so as to impact the touch panel to fall off.

In one possible design, the third portion is parallel to the first portion. Ensuring that the third portion can be stably disposed in the gap of the liquid crystal display and the touch panel.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a schematic diagram of a partial structure of a liquid crystal display and a touch panel in an electronic device according to an embodiment of the present application;

fig. 2 is a front view of a partial structure of a liquid crystal display, a touch panel and a flexible circuit board, where the direction indicated by an arrow is the thickness direction of the liquid crystal display;

FIG. 3 is a schematic diagram of a partial structure of another LCD and touch panel according to an embodiment of the present application;

fig. 4 is a schematic diagram of a partial structure of a flexible circuit board according to an embodiment of the present application;

FIG. 5 is a schematic view of a first arrangement of openings on the flexible printed circuit board shown in FIG. 4, wherein the direction indicated by the arrows is one arrangement direction of the openings, i.e. the width direction of the openings;

fig. 6 is a schematic structural diagram of a conductive layer with a second hole arrangement in accordance with an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of a conductive layer with a third hole arrangement manner according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a conductive layer with a fourth hole arrangement in accordance with an embodiment of the present disclosure.

Reference numerals:

1-a flexible circuit board; 11-a conductive layer; 111-opening holes; 112-conductive parts; 12-a first part; 13-a second part; 14-a third part; 2-liquid crystal display; 3-a touch panel; 4-filling part.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

Detailed Description

The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

An embodiment of the present application provides an electronic device, as shown in fig. 1 and fig. 2, which includes a flexible circuit board 1, a liquid crystal display 2, and a touch panel 3 sequentially arranged along a thickness direction (a direction indicated by an arrow in fig. 2), and the electronic device may be an electronic product such as a mobile phone, a tablet computer, etc. having a touch function, which is not limited herein specifically.

Specifically, in the electronic device, in order to complete the connection between the liquid crystal display 2 and the touch panel 3, it is necessary to arrange wiring thereon through the flexible circuit board 1 to achieve the electrical connection between the two, and in order to be able to complete the reasonable layout of the wiring in a limited space to achieve the electrical connection with the touch panel 3, and at the same time, to be able to reduce the bending tension caused by bending of the flexible circuit board 1. The flexible circuit board 1 is required to be connected to the upper surface of the liquid crystal display 2 in a single-layer structure, and after a part of the flexible circuit board extends out and is bent by 180 degrees, a part of the flexible circuit board 1 is arranged in a frame gap between the liquid crystal display 2 and the touch panel 3 and is adhered to the frame of the liquid crystal display 2. The wiring of the circuit board is convenient to realize through the arrangement of the single-layer bent flexible circuit board 1, and the space utilization rate is improved through the structural fit form of the flexible circuit board 1, the liquid crystal display 2 and the touch panel 3, so that the occupied space is saved.

Wherein, as shown in fig. 3 and 4, in the above-described structural cooperation, the flexible circuit board 1 includes a first portion 12, a second portion 13, and a third portion 14; in the thickness direction, the first portion 12 is placed over the liquid crystal display 2, the third portion 14 is placed between the touch panel 3 and the liquid crystal display 2, and the second portion 13 is bent to connect the first portion 12 and the third portion 14. Since the flexible circuit board 1 needs to be partially bent to complete the arrangement of the traces, static electricity coming from the outside enters along the frame slit to strike the flexible circuit board 1 at the bent portion and even the traces thereon, thereby causing circuit damage. The flexible circuit board 1 further comprises a conductive layer 11, the conductive layer 11 is conductive, the conductive layer 11 at least covers the second portion 13, static electricity entering from a gap is temporarily attracted to the conductive layer 11 through the conductive layer 11 at least covered on the second portion 13, the conductive layer 11 is connected with the iron frame of the liquid crystal display 2 to form a grounding mode (namely, static electricity is led out through the conductive layer 11) so as to remove the static electricity, and therefore the static electricity is prevented from being driven into a bending area of the flexible circuit board 1 (namely, the second portion 13).

It should be emphasized here that, for the conductive layer 11 to be provided, the entire surface of the flexible circuit board 1 may be covered by means of gluing for processing, or may be partly covered to save the material of the conductive layer 11, so long as it is ensured that at least the bent second portion 13 can be covered and that it can be grounded for conducting electricity through the conductive layer 11 for eliminating static electricity, which is not particularly limited herein.

More specifically, as shown in fig. 3, at least in the structural cooperation of the conductive layer 11 provided on the second bent portion 13, the conductive layer 11 is further covered on the basis of the bending stress generated by bending 180 degrees, so that the bending stress is larger, the third portion 14 bent by the second portion 13 is connected with the liquid crystal display 2, and due to the larger bending stress, the connection between the third portion 14 and the liquid crystal display 2 is easily disconnected, and under the action of the restoring force of bending the second portion 13, the third portion 14 is easily hit to the frame of the touch panel 3, and meanwhile, the touch panel 3 is pushed to be subjected to the force moving in the direction away from the liquid crystal display 2, so that the touch panel 3 is easily dropped. In order to avoid that the touch panel 3 is easily detached, the conductive layer 11 is provided with an opening 111, and the opening 111 covers the second portion 13. Through the openings 111 formed in the conductive layer 11, so that the conductive layer 11 located in the second portion 13 can expose a local second portion 13 through the openings 111, the design of the openings 111 can reduce the bending stress of the second portion 13 while not affecting the attraction of static electricity to the conductive layer 11, thereby avoiding the falling of the touch panel 3.

Therefore, the layout of the wiring of the flexible circuit board 1 is realized by adopting the structure fit mode of bending the single-layer flexible circuit board 1, the layout is reasonable, the space utilization rate is saved, and meanwhile, the conductive layer 11 is covered by the bent second part 13 to prevent static from being beaten to the wiring of the bent flexible circuit board 1 from a gap, and meanwhile, the conductive layer 11 is ensured to play the role of preventing static from being beaten to the wiring of the bent second part 13 through the arranged opening 111, so that the bending stress of the second part 13 is reduced to the greatest extent, and the restoring force of the bent second part 13 is reduced, thereby avoiding the falling of the touch panel 3.

In order to ensure that the provided openings 111 can reduce bending stress and simultaneously enable static electricity to be temporarily attracted and led into the conductive layer 11, the openings 111 are further limited on the trace of the flexible circuit board 1 (i.e. the second portion 13) which cannot pass through the openings 111 and be punched into the bending region, as shown in fig. 5, 6, 7 and 8.

Specifically, since the conductive layer 11 covers at least the whole surface of the bent second portion 13, the coverage area is larger, and for the arrangement of the openings 111, in order to avoid that static electricity passes through the openings 111 to be on the wiring temporarily due to the oversized openings 111, the openings 111 are designed to be two or more, and the openings 111 are sequentially arranged. By adopting the arrangement mode, the number, the size, the shape, the arrangement form and the like of the openings 111 can be adaptively adjusted according to actual use requirements, so long as the arranged openings 111 can reduce bending stress and simultaneously can not lead static electricity to pass through to damage wiring, and the arrangement mode is not particularly limited.

Wherein for at least two openings 111 of the conductive layer 11 arranged at the second portion 13, the distance between adjacent openings 111 is less than or equal to 5mm. With this arrangement, the conductive layer 11 portion between the adjacent openings 111 forms the conductive portion 112, and the conductive portion 112 is used for temporarily attracting static electricity moving toward the position of the opening 111 to the conductive portion 112 when the static electricity comes to the outside, so as to change the moving direction of the static electricity, thereby preventing the static electricity from passing through the opening 111. For limiting the distance between the openings 111 to a range smaller than 5mm, the bending stress can be reduced to a greater extent while the conductive portions 112 can attract static electricity of adjacent openings 111, and the bending stress can be dispersed by the plurality of conductive portions 112 which are distributed in a dispersed manner, so that the bending restoring force is reduced, and the bending stability is improved.

In addition, the sum of the areas of the openings 111 in the second portion 13 is fifty to eighty percent of the surface area of the second portion 13. For the arranged holes 111, the bending stress of the holes 111 can be reduced, static electricity can not pass through the holes 111 and be beaten to the structural fit on the wiring, the total area of the holes 111 is increased to the greatest extent by limiting the total area of the holes 111 and adjusting the specific structure and layout of the holes 111, so that the bending stress of the second part 13 is reduced to the greatest extent, and a better effect of preventing the touch panel 3 from falling off is ensured.

It should be emphasized here that the ratio of the sum of the areas of the openings 111 of the second portion 13 to the surface area of the second portion 13 may be adjusted according to the shape and size of the openings 111 and the layout of the openings 111, and is not particularly limited as long as the ratio is within the above-mentioned range.

As a specific embodiment of the present application, as shown in fig. 5, 6, 7 and 8, a specific description is given of the shape, arrangement, and the like of the openings 111 to be provided:

as shown in fig. 5, for the openings 111, the openings 111 are uniformly arranged in at least the second portion 13 along a direction perpendicular to the thickness direction (i.e., a direction indicated by an arrow in fig. 5), in the structural cooperation of such openings 111, the plurality of openings 111 are uniformly arranged along the direction perpendicular to the thickness direction, in this direction, the openings 111 are sequentially arranged, and the arrangement is simple in structure, and the layout of such uniform structure can facilitate processing while avoiding static electricity passing through the openings 111.

Alternatively, the maximum distance between the inner walls of the opening 111 is less than 3mm in a direction perpendicular to the thickness direction. Static electricity is prevented from passing through the opening 111 by limiting the maximum distance of the inner wall of the opening 111 in this direction.

In addition, as shown in fig. 7, the openings 111 may be provided so that the openings 111 are uniformly arranged along the bending direction of the second portion 13. For the layout in this way, in order to avoid that static electricity easily passes through the opening 111 due to the excessively long length of the opening 111 perpendicular to the thickness direction, for such an opening 111, the maximum distance between the inner walls of the opening 111 in the arrangement direction of the opening 111 needs to be less than 1mm to ensure a good effect of blocking the static electricity passing through the opening 111.

It should be emphasized that, in addition to the arrangement of the two openings 111 as set forth above, the structure as shown in fig. 6 and 8 may be designed, that is, the combination of the two openings 111 may be designed, or the arrangement of the openings 111 may be inclined in a certain direction, so long as the arrangement can satisfy the requirement of preventing static electricity from passing through the openings 111 and simultaneously reducing stress to the maximum extent, and the arrangement may be in various forms, which is not particularly limited herein.

Specifically, in order to improve the processing efficiency, in general, the disposed conductive layer 11 is directly laid on the surface of the flexible circuit board 1, that is, the conductive layer 11 covers the first portion 12, the second portion 13 and the third portion 14, and then the second portion 13 is bent by assembly to realize the layout of the wiring. In the case that the conductive layer 11 covers the whole flexible circuit board, in order to reduce bending stress to the greatest extent, the opening 111 covering the second portion 13 extends to at least the first portion 12 and/or the third portion 14, and by adopting the manner that the opening 111 extends to the first portion 12 and/or the third portion 14, the opening 111 at the positions of the first portion 12 and the third portion 14 at the connection position with the second portion 13 can reduce bending resistance of the second portion 13, which drives the first portion 12 and the third portion 14 when the second portion 13 is bent, so that bending resistance of the first portion 12 and the third portion 14 is reduced, and bending stress of the second portion 13 is correspondingly reduced, thereby achieving a better effect of reducing bending stress.

In order to ensure the covering effect of the conductive layer, the conductive layer 11 is glued to the first portion 12, the second portion 13 and the third portion 14, respectively, so as to avoid local tilting.

Optionally, for the openings 111, in order to ensure uniformity of the openings 111 and to ensure better effect of preventing static electricity from passing through the openings 111, the openings 111 are square holes, and the distances between adjacent openings 111 are the same along the width direction (the direction indicated by the arrow in fig. 5) of the square holes. The arrangement of the square holes with uniform and stable structure makes the strip-shaped conductive parts 112 between the adjacent square holes uniformly distributed, so that static electricity moving from any angle can be attracted by the strip-shaped conductive parts 112 before striking the direction holes, thereby leading out the static electricity.

More specifically, in order to ensure that the square holes arranged can effectively prevent static electricity from passing through and reduce bending stress to the greatest extent, the width direction of the square holes is 1mm, and the distance between every two adjacent square holes is 5mm.

It should be emphasized here that the shape of the openings 111 may be circular, other polygonal, or other structures, and the arrangement of the openings 111 and the ratio of the sum of the opening areas may be different according to the structure, and the structure of the square-shaped openings is not particularly limited herein.

Alternatively, the conductive layer 11 may be copper foil, or may be other conductive and thinner structures, so long as it can ensure that static electricity can be conducted out after the conductive layer is grounded, and meanwhile, bending stress of the bent second portion 13 is reduced to the maximum extent, and specific materials and thicknesses selected for the conductive layer 11 are not particularly limited.

The present application further provides a specific embodiment, as shown in fig. 2, for the second portion 13 is bent 180 degrees, and then the third portion 14 is located in a gap between the frame positions of the liquid crystal display 2 and the touch panel 3, in order to avoid the third portion 14 from being impacted by the bending force to the touch panel 3, the third portion 14 is fixedly connected with the housing of the liquid crystal display 2 through a filling portion 4, which is disposed, by a binding process, where the binding process belongs to a common connection manner in the art, and is not described herein.

Since the frame positions of the liquid crystal display 2 and the touch panel 3 have small gaps when being matched, the third portion 14 is preferably parallel to the first portion 12 when the bent third portion 14 is placed in the gaps, so as to ensure that the third portion 14 can be stably arranged in the gaps.

In summary, the adoption of the form of arranging the openings 111 in the corresponding bending regions on the arranged conductive layers 11 solves the problem that static electricity is likely to be beaten to the bending region to cause static electricity damage, reduces the bending stress increased by connecting the conductive layers 11 in the bending regions, and avoids the falling of the touch panel 3.

It is noted that a portion of this patent document contains material which is subject to copyright protection. The copyright owner has reserved copyright rights, except for making copies of patent documents or recorded patent document content of the patent office.

Claims

1. An electronic device comprising a flexible circuit board (1), a liquid crystal display (2) and a touch panel (3) arranged in this order in a thickness direction, characterized in that the flexible circuit board (1) comprises a first portion (12), a second portion (13) and a third portion (14);

in the thickness direction, the first portion (12) is disposed above the liquid crystal display (2), the third portion (14) is disposed between the touch panel (3) and the liquid crystal display (2), and the second portion (13) is bent to connect the first portion (12) and the third portion (14);

the flexible circuit board (1) further comprises a conductive layer (11), the conductive layer (11) is used for absorbing static electricity, the conductive layer (11) covers the first part (12), the second part (13) and the third part (14), the conductive layer (11) is provided with an opening (111), and the opening (111) covers the second part (13);

-said opening (111) covering said second portion (13) extends at least to said first portion (12) and/or said third portion (14);

the number of the holes (111) is two or more, and the conductive layer (11) between two adjacent holes (111) forms a conductive part (112), wherein the conductive part (112) is used for temporarily attracting static electricity moving towards the position direction of the holes (111) to the conductive part (112) when the static electricity comes.

2. The electronic device according to claim 1, characterized in that the openings (111) are arranged in sequence.

3. Electronic device according to claim 2, characterized in that the distance between adjacent openings (111) is less than or equal to 5mm.

4. The electronic device according to claim 2, characterized in that the sum of the areas of the openings (111) located in the second part (13) is fifty to eighty percent of the surface area of the second part (13).

5. The electronic device according to any one of claims 1-4, characterized in that the openings (111) are uniformly arranged in a direction perpendicular to the thickness direction.

6. The electronic device according to claim 5, characterized in that the maximum distance between the inner walls of the openings (111) in a direction perpendicular to the thickness is less than 3mm.

7. Electronic device according to any of claims 1-4, characterized in that the openings (111) are evenly arranged in the bending direction of the second part (13).

8. The electronic device according to claim 1, characterized in that the conductive layer (11) is adhesively connected to the first portion (12), the second portion (13) and the third portion (14), respectively.

9. The electronic device according to claim 1, wherein the openings (111) are square-shaped openings, and the distances between adjacent openings (111) are the same in the width direction of the square-shaped openings.

10. The electronic device according to claim 9, wherein the width of the square hole is 1mm in the width direction of the square hole, and a distance between adjacent square holes is 5mm.

11. The electronic device according to any one of claims 1-4, characterized in that the conductive layer (11) is a copper foil.

12. The electronic device according to any of claims 1-4, characterized in that the third part (14) is fixedly connected to the housing of the liquid crystal display (2) by a binding process.

13. The electronic device according to any of claims 1-4, characterized in that the third portion (14) is parallel to the first portion (12).