CN113467120A

CN113467120A - Electronic device

Info

Publication number: CN113467120A
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: 2021-10-01
Anticipated expiration: 2040-03-30
Also published as: CN113467120B

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; 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, the conductive layer at least covers the second portion, the conductive layer is provided with an opening, and the opening covers the second portion. Utilize the electronic equipment that this application provided, reduced the stress in bending zone when can solving the line problem of static damage LCD to avoid touch panel's droing.

Description

Electronic device

Technical Field

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

Background

Among the existing electronic products, electronic products having a touch panel are common, and the operation of the touch panel requires the electrical connection of the liquid crystal display to control the implementation. Generally, the flexible circuit board disposed on the lcd carries its traces to control the operation of the touch panel, and in order to complete the layout of the traces, a portion of the flexible circuit board needs to be bent by 180 degrees to make a portion of the flexible circuit board located in the frame gap between the touch panel and the lcd. In the structural cooperation, the flexible circuit board faces the problem of static electricity, the static electricity entering along the gap can strike the routing of the flexible circuit board at the bent part to cause the damage of the flexible circuit board, and in order to solve the problem of the static electricity damage, copper is generally laid on the surface of the flexible circuit board in a large area to prevent the static electricity. However, this method may cause the bending stress of the bending portion of the flexible circuit board to be too large, and the bending portion is easily deformed to jack up the touch panel, thereby causing the touch panel to come unstuck.

Disclosure of Invention

An object of the application is to provide an electronic equipment, reduced the stress in bending zone when can solving the problem that the static damage LCD walked the line to avoid touch panel's droing.

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;

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, the conductive layer at least covers the second portion, the conductive layer is provided with an opening, and the opening covers the second portion.

Through adopting the structure complex form that this kind of individual layer flexible circuit board buckled to realize the overall arrangement that the flexible circuit board walked the line, it is comparatively reasonable to arrange, practice thrift space utilization, simultaneously through at least partly covering the conducting layer at the bending type in order to prevent that static from beating the flexible circuit board of buckling from the gap and walk the line, meanwhile, through the trompil that sets up, when guaranteeing that the conducting layer can play the line of walking of preventing static to squeeze into the second part of buckling, furthest's the stress of buckling that has reduced the second part, reduce the restoring force after the second part buckles, thereby avoid touch panel's droing.

In a possible design, the number of the openings is two or more, and the openings are arranged in sequence.

Can be according to the user demand of reality, quantity, size, shape, the form of arranging etc. of adaptability adjustment trompil to can satisfy the trompil that sets up and can reduce bending stress and not make static pass and destroy the line of walking in the time.

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

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.

Make the trompil can reduce bending stress, can not make static pass from the trompil and beat the structure complex basis on walking the line, through the injecing of making the total area of trompil, through modes such as the concrete structure and the overall arrangement of adjustment trompil, the total area of furthest's increase trompil to the bending stress of furthest's reduction second portion guarantees the better effect that prevents touch panel and drop.

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

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

In one possible design, the openings are evenly 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 arrangement direction of the openings, so as to ensure a good effect of blocking static electricity from passing through the openings.

In one possible design, the electrically conductive layer covers the first, second and third portions, the opening covering the second portion extending at least to the first and/or third portion. The bending resistance of the first part and the third part driven by the second part during bending can be reduced, 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 effect of reducing the bending stress is better.

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

In one possible design, the openings are square openings, and the distance between adjacent openings is the same along the width direction of the square openings. Through the setting of the quad slit of the even stable structure, make the banding conductive part of form between the adjacent quad slit, arrange evenly, make no matter from which angle motion static of coming, can both be before hitting the direction hole, attracted by banding conductive part to derive static.

In a possible design, along the width direction of the square holes, the width of each square hole is 1mm, and the distance between every two adjacent square holes is 5 mm.

In one possible design, the conductive layer is a copper foil. Through the arrangement of the copper foil which can be made to be thin and has the conductive function, the bending stress is reduced to the maximum limit, and the effect is good.

In one possible design, the third portion is fixedly connected to the housing of the liquid crystal display through a bonding process. So as to prevent the third portion from moving under the influence of the bending force to impact the touch panel and cause the touch panel to fall off.

In one possible design, the third portion is parallel to the first portion. It is ensured that the third portion can be stably arranged in the gap between 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 view of a partial structure of a liquid crystal display and a touch panel in an electronic device according to an embodiment of the present disclosure;

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

FIG. 3 is a schematic view of a partial structure of a liquid crystal display and a touch panel in another direction according to an embodiment of the present disclosure;

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

fig. 5 is a schematic diagram of a conductive layer structure of the first arrangement of the openings on the flexible circuit board in fig. 4, wherein a direction indicated by an arrow is an arrangement direction of the openings, i.e., a width direction of the openings;

fig. 6 is a schematic structural diagram of a conductive layer with a second arrangement of openings according to an embodiment of the present disclosure;

fig. 7 is a schematic diagram of a conductive layer structure of a third arrangement of openings according to an embodiment of the present disclosure;

fig. 8 is a schematic structural diagram of a conductive layer with a fourth arrangement of openings according to an embodiment of the present disclosure.

Reference numerals:

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

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

Detailed Description

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of 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, the electronic device includes a flexible circuit board 1, a liquid crystal display 2, and a touch panel 3, which are sequentially arranged along a thickness direction (as indicated by an arrow in fig. 2), and the electronic device may be an electronic product such as a mobile phone and a tablet computer with a touch function, and is not limited herein.

Specifically, in the electronic device, in order to complete the connection between the liquid crystal display 2 and the touch panel 3, the flexible circuit board 1 is required to have the wires arranged thereon to achieve the electrical connection therebetween, and in order to complete the reasonable layout of the wires in a limited space to achieve the electrical connection with the touch panel 3, the bending tension caused by bending the flexible circuit board 1 can be reduced. The flexible circuit board 1 is 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 1 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 bonded with 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 and the occupied space is saved due to the structural matching form of the flexible circuit board 1, the liquid crystal display 2 and the touch panel 3.

As shown in fig. 3 and 4, in the 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 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. Since the flexible circuit board 1 needs to be partially bent to complete the arrangement of the traces, the flexible circuit board 1 at the bent portion and even the traces thereon are prevented from being hit by static electricity coming from the outside along the frame gap, thereby causing circuit damage. The flexible circuit board 1 further comprises a conductive layer 11, the conductive layer 11 is capable of conducting electricity, the conductive layer 11 at least covers the second portion 13, static electricity entering from the gap can be temporarily absorbed by the conductive layer 11 at least covering the second portion 13, the conductive layer 11 can attract the static electricity to strike the conductive layer 11, the conductive layer 11 is connected with an iron outer frame of the liquid crystal display 2 to form a grounding mode (namely the 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 striking the flexible circuit board 1 (namely the second portion 13) in the bending area to be in a wiring mode.

It should be emphasized that, for the conductive layer 11, the whole surface of the flexible circuit board 1 may be covered by gluing for processing, and a partial covering may also be adopted to save the material of the conductive layer 11, as long as at least the bent second portion 13 can be covered and the ground can be grounded for eliminating static electricity by conduction through the conductive layer 11, which is not limited specifically herein.

More specifically, as shown in fig. 3, at least in the structural cooperation of the second bent portion 13 with the conductive layer 11, the conductive layer 11 covers on the basis of the bending stress generated by bending by 180 degrees, so that the bending stress is larger, the third portion 14 bent by the second portion 13 is connected to the liquid crystal display 2, due to the larger bending stress, the third portion 14 is easily disconnected from the liquid crystal display 2, and under the action of the restoring force of the second portion 13, the third portion 14 is easily hit on the frame of the touch panel 3, and at the same time, 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 detached. In order to prevent the touch panel 3 from easily falling off, the conductive layer 11 is provided with an opening 111, and the opening 111 covers the second portion 13. Through the opening 111 formed in the conductive layer 11, the conductive layer 11 located in the second portion 13 can expose a part of the second portion 13 through the opening 111, and the opening 111 can reduce the bending stress of the second portion 13 without affecting the electrostatic attraction of the conductive layer 11, thereby preventing the touch panel 3 from falling off.

Consequently, through adopting the structure complex form that this kind of individual layer flexible circuit board 1 buckles to realize the overall arrangement that flexible circuit board 1 walked the line, the overall arrangement is comparatively reasonable, practice thrift space utilization, cover conducting layer 11 through the second part 13 at least at the buckling simultaneously in order to prevent that static from hitting the flexible circuit board 1 of buckling from the gap and walk the line on, meanwhile, through the trompil 111 that sets up, guarantee when conducting layer 11 can play the line of walking of preventing static hitting the second part 13 of buckling, furthest's the bending stress that has reduced second part 13, reduce the restoring force after second part 13 buckles, thereby avoid droing of touch panel 3.

As shown in fig. 5, 6, 7 and 8, in order to ensure that the opening 111 is provided to reduce the bending stress, static electricity can be temporarily attracted to be introduced into the conductive layer 11, and will not penetrate through the opening 111 and reach the trace of the flexible circuit board 1 (i.e., the second portion 13) in the bending region, the opening 111 is further limited.

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

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 5 mm. With this arrangement, the portion of the conductive layer 11 between the adjacent openings 111 forms the conductive portion 112, and the conductive portion 112 is used to attract static electricity moving toward the position of the opening 111 to the conductive portion 112 when the static electricity comes, so as to change the moving direction of the static electricity, thereby preventing the static electricity from passing through the opening 111. The distance between the holes 111 is limited to be less than 5mm, so that the conductive parts 112 can attract static electricity of the adjacent holes 111, bending stress is reduced to a large extent, the bending stress can be dispersed through the conductive parts 112 distributed in a dispersed mode, 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 accounts for fifty to eighty percent of the surface area of the second portion 13. To the trompil 111 that sets up, when making trompil 111 can reduce bending stress, can not make static pass from trompil 111 and hit the structure complex basis on the line of walking, through the restriction of making trompil 111 total area, through modes such as the concrete structure and the overall arrangement of adjustment trompil 111, furthest's increase trompil 111 total area to furthest's reduction second portion 13 bending stress guarantees the better effect that prevents touch panel 3 and drops.

It should be emphasized that the ratio of the area of the openings 111 of the second portion 13 to the surface area of the second portion 13 is also 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 range.

As a specific embodiment of the present application, as shown in fig. 5, 6, 7 and 8, the shape, arrangement, and the like of the openings 111 provided will be specifically described by way of example:

as shown in fig. 5, for the arranged openings 111, the openings 111 are uniformly arranged in the at least 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 the openings 111, the plurality of openings 111 are uniformly arranged along the direction perpendicular to the thickness direction, and in this direction, the openings 111 are sequentially arranged, so that the arrangement is simple in structure, and the arrangement of the uniform structure can avoid static electricity from passing through the openings 111 and is convenient for processing.

Alternatively, the maximum distance between the inner walls of the apertures 111 in a direction perpendicular to the thickness direction is less than 3 mm. The maximum distance of the inner wall of the opening 111 in this direction is limited to prevent static electricity from passing through the opening 111.

As shown in fig. 7, the holes 111 may be arranged uniformly along the bending direction of the second portion 13. With this arrangement, in order to avoid that static electricity easily passes through the opening 111 because the length of the opening 111 in the direction perpendicular to the thickness direction is too long, for this kind of opening 111, the maximum distance between the inner walls of the opening 111 along the arrangement direction of the opening 111 needs to be less than 1mm, so as to ensure a good effect of blocking static electricity from passing through the opening 111.

It should be emphasized that, in addition to the arrangement of the two openings 111 listed above, the structure shown in fig. 6 and 8, that is, the combination of the two openings 111, or the arrangement of the openings 111 may be arranged obliquely along one direction, and the arrangement may be in various forms as long as it can reduce the stress to the maximum extent while preventing static electricity from passing through the openings 111, and is not limited in detail here.

Specifically, in order to improve the processing efficiency, generally, the arranged 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 through assembly to realize the layout of the routing. In the case that the conductive layer 11 covers the entire flexible circuit board, in order to reduce the bending stress to the maximum, the opening 111 covering the second portion 13 is extended at least to the first portion 12 and/or the third portion 14, and the opening 111 is extended to the first portion 12 and/or the third portion 14, so that the opening 111 is formed at the position of the first portion 12 and the position of the third portion 14, which are respectively connected with the second portion 13, and the bending resistance of the first portion 12 and the third portion 14, which is driven by the second portion 13 when the second portion 13 is bent, can be reduced, so that the bending resistance of the first portion 12 and the third portion 14 is reduced, and the bending stress of the second portion 13 is correspondingly reduced, thereby achieving a better bending stress reduction effect.

Wherein, in order to ensure the covering effect of the conductive layer and avoid local tilting, the conductive layer 11 is adhesively connected with the first part 12, the second part 13 and the third part 14, respectively.

Optionally, for the arranged 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 distance between adjacent openings 111 is the same along the width direction of the square holes (as indicated by arrows in fig. 5). Through the setting of the quad slit of the even stable structure, make the banding conductive part 112 of form between the adjacent quad slit, arrange evenly, make no matter from which angle the static of coming of motion, can both be before hitting the direction hole, attracted by banding conductive part 112 to derive static.

More specifically, in order to guarantee that the quad slit that sets up can effectually prevent that static from passing and furthest's reduction bending stress, along the width direction of quad slit, the width of quad slit is 1mm, and the distance between the adjacent quad slit is 5 mm.

It should be emphasized that the shape of the holes 111 may be circular or other polygonal shapes, and the arrangement of the holes 111 and the ratio of the sum of the areas of the holes may be different according to the structure, and is not particularly limited, and the structure of the square hole is a preferred embodiment of the present invention.

Alternatively, the conductive layer 11 may be a copper foil, or may be a conductive and thin structure, as long as it is ensured that static electricity can be led out after the conductive layer is grounded, and the bending stress of the bent second portion 13 is reduced to the maximum extent, and the specific material and thickness of the conductive layer 11 are not specifically limited.

As shown in fig. 2, after the second portion 13 is bent by 180 degrees, the third portion 14 is located in a gap of the frame between the liquid crystal display 2 and the touch panel 3, in order to avoid the third portion 14 from being impacted on the touch panel 3 due to the bending force, the third portion 14 is fixedly connected with the housing of the liquid crystal display 2 through the arranged filling portion 4 by a binding process, wherein the binding process belongs to a common connection mode in the art, and details are not repeated here.

Because the gap left between the liquid crystal display 2 and the touch panel 3 is small when the frames are matched, when the bent third portion 14 is placed in the gap, it is preferable to make the third portion 14 parallel to the first portion 12 to ensure that the third portion 14 can be stably placed in the gap.

In summary, in the form of providing the opening 111 in the corresponding bending region on the arranged conductive layer 11, the problem of electrostatic damage caused by static electricity easily hitting the bending region for wiring is solved, and meanwhile, the bending stress of the bending region increased by connecting the conductive layer 11 is reduced, and the touch panel 3 is prevented from falling off.

It should be noted that a portion of this patent document contains material which is subject to copyright protection. The copyright owner reserves the copyright rights whatsoever, except for making copies of the patent files or recorded patent document contents of the patent office.

Claims

1. An electronic apparatus 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 placed above 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);

the flexible circuit board (1) further comprises a conductive layer (11), the conductive layer (11) at least covers the second portion (13), the conductive layer (11) is provided with an opening (111), and the opening (111) covers the second portion (13).

2. The electronic device according to claim 1, wherein the openings (111) are two or more, and the openings (111) are arranged in sequence.

3. The electronic device according to claim 2, wherein a distance between adjacent openings (111) is less than or equal to 5 mm.

4. The electronic device according to claim 2, characterized in that 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).

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

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

7. An 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 portion (13).

8. An electronic device according to any of claims 1-4, characterized in that the conductive layer (11) covers the first part (12), the second part (13) and the third part (14), the opening (111) covering the second part (13) extending at least to the first part (12) and/or the third part (14).

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

10. The electronic device according to claim 8, wherein the openings (111) are square openings, and a distance between adjacent openings (111) is the same along a width direction of the square openings.

11. The electronic device according to claim 8, wherein the width of the square hole is 1mm and the distance between adjacent square holes is 5mm in the width direction of the square hole.

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

13. An 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 means of a bonding process.

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