CN112466216A - Flexible circuit board, curved surface display module and curved surface display device - Google Patents
Flexible circuit board, curved surface display module and curved surface display device Download PDFInfo
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- CN112466216A CN112466216A CN202011447996.2A CN202011447996A CN112466216A CN 112466216 A CN112466216 A CN 112466216A CN 202011447996 A CN202011447996 A CN 202011447996A CN 112466216 A CN112466216 A CN 112466216A
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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Abstract
The invention discloses a flexible circuit board for a curved surface display module, a curved surface display module and a curved surface display device, which relate to the technical field of display, wherein the flexible circuit board comprises: a flexible substrate; the flexible substrate comprises a bending area and a main body area, and the bending area is arranged on one side of the main body area; the bending area comprises a plurality of bending sub-areas which are independent from each other; the bending area comprises a first bending area group and two second bending area groups, and the two second bending area groups are positioned on two sides of the first bending area group along the second direction; the bending subarea comprises a first bending subarea and a second bending subarea, the first bending area group comprises the first bending subarea, and the second bending area group comprises the second bending subarea; in the first direction, the length of the second bending subarea is greater than that of the first bending subarea. The invention effectively solves the problem that when the flexible circuit board of the curved surface display module in the prior art is bent, two ends of the flexible circuit board are easy to peel off and tear from the curved surface display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible circuit board, a curved surface display module and a curved surface display device.
Background
At present, with the continuous development of display technology, the requirement for the external dimension of the display screen is higher and higher. In particular, for mobile display products such as mobile phones, a display effect with a narrow frame and a high screen ratio is more required, that is, the size of a non-display area around a display area of a display panel is desired to be smaller.
In order to increase the screen occupation ratio of the display panel, a driver chip for driving the display panel to display is usually bound to a Flexible Printed Circuit (FPC), and then the driver chip is bent through the Flexible Printed Circuit to the backlight side of the display panel, so as to increase the screen occupation ratio of the display panel.
However, in the prior art, in the curved surface display module, the flexible circuit board is generally bound on one side of the curved surface display panel in the curved surface state, because the flexible circuit board in the curved surface display module adopts the design of the flexible circuit board in the flat panel display module, namely, the lengths of all parts of the bent portions in the flexible circuit board are the same, thereby when the bent portions in the flexible circuit board are bent, the pulling force applied to the two ends of the bent portions in the flexible circuit board is greater than the pulling force applied to the middle parts thereof, therefore, the two ends of the bent portions in the flexible circuit board are easier to peel off and tear the curved surface display panel.
Disclosure of Invention
In view of this, the invention provides a flexible circuit board, a curved surface display module and a curved surface display device, which effectively solve the problem that when a flexible circuit board for the curved surface display module in the prior art is bent, two ends of the flexible circuit board are easy to peel off and tear from a curved surface display panel.
The present invention provides a flexible wiring board, including: a flexible substrate; the flexible substrate comprises a bending area and a main body area which are connected, and the bending area is arranged on one side of the main body area along a first direction; the bending area comprises a plurality of mutually independent bending sub-areas which are arranged along a second direction, wherein the first direction is intersected with the second direction; the bending area comprises a first bending area group and two second bending area groups, and the two second bending area groups are positioned on two sides of the first bending area group along the second direction; the bending subarea comprises a first bending subarea and a second bending subarea, the first bending area group comprises at least one first bending subarea, and the second bending area group comprises at least one second bending subarea; in the first direction, the length of the second bending subarea is greater than that of the first bending subarea.
Based on the same inventive concept, the invention also provides a curved surface display module, which comprises: the display device comprises a curved surface display panel and a flexible circuit board, wherein the flexible circuit board is the flexible circuit board provided by the invention; the curved surface display panel comprises a bending shaft, and the bending shaft extends along a first direction; the flexible circuit board is bound on one side of the curved surface display panel along the first direction, and one side of the bending area, which is far away from the main body area, is bound on the curved surface display panel.
Based on the same invention concept, the invention also provides a curved surface display device which comprises the curved surface display module provided by the invention.
Compared with the prior art, the flexible circuit board, the display module and the display device provided by the invention at least realize the following beneficial effects:
the invention provides a flexible circuit board, which is used for a curved surface display module and comprises a flexible substrate, wherein the flexible substrate comprises a bending area and a main body area which are connected, and the bending area is arranged on one side of the main body area along a first direction. The bending area comprises a plurality of bending sub-areas which are mutually independent, the plurality of bending sub-areas are arranged along the second direction, and one side, far away from the main body area, of each bending sub-area is bound on the curved surface display panel. The bending sub-area comprises a first bending sub-area and a second bending sub-area, the first bending sub-area is arranged in the middle area of the bending area, and the second bending sub-area is arranged on two sides of the bending area along the second direction. The display panel in the curved surface display module is a curved surface display panel which is of a curved surface structure, one side of the bending area in the flexible circuit board, which is far away from the main body area, is bound to one side of the curved surface display panel in a bending state, so that when the bending region between the display panel and the main body region is bent, because the display panel is in a cambered surface structure, in the flexible circuit board, the distance between the part of the main body area positioned in the middle area and the curved surface display panel is less than the distance between the part of the main body area positioned in the two sides along the second direction and the curved surface display panel, the stress at the two sides of the bending area along the second direction is larger than the stress at the middle area of the bending area, namely when the bending area in the flexible circuit board is bent, the pulling force borne by the second bending subareas in the second bending area groups positioned at the two sides of the first bending area group along the second direction is larger than the pulling force borne by the first bending subareas in the first bending area group. In the first direction, the length that the subregion was buckled to the second is greater than the length of the subregion of first buckling, through increasing the length that the subregion was buckled to the second for when the subregion was buckled in the flexible circuit board, the pulling force that the subregion received was buckled to the second can be alleviated, thereby when effectively reducing the flexible circuit board and buckling, the pulling force that the subregion received was buckled to the second caused the risk that takes place to peel off the damage between its and the curved surface display panel excessively.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic plane structure diagram of a flexible printed circuit board provided by the present invention;
FIG. 2 is a schematic structural diagram of a curved display module according to the present invention;
FIG. 3 is a schematic plan view of another flexible printed circuit board provided by the present invention;
FIG. 4 is a schematic plan view of another flexible printed circuit provided in the present invention;
FIG. 5 is a schematic plan view of another flexible printed circuit provided in the present invention;
FIG. 6 is a schematic plane structure diagram of another flexible printed circuit board provided by the present invention;
FIG. 7 is a schematic plan view of another flexible printed circuit provided in the present invention;
FIG. 8 is a schematic plan view of another flexible printed circuit provided in the present invention;
FIG. 9 is a schematic plan view of another flexible printed circuit provided in the present invention;
FIG. 10 is a schematic plane view of another curved display module according to the present invention;
fig. 11 is a schematic plan view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic plan view of a flexible printed circuit provided in the present invention, and referring to fig. 1, the present embodiment provides a flexible printed circuit, including: a flexible substrate 10;
the flexible substrate 10 includes a bending region a1 and a body region B1 connected, the bending region a1 is disposed at one side of the body region B1 along the first direction X;
the bending region a1 comprises a plurality of bending sub-regions a10 independent of each other, and a plurality of bending sub-regions a10 are arranged along a second direction Y, wherein the first direction X and the second direction Y intersect;
the bending zone a1 comprises a first bending zone group a20 and two second bending zone groups a30, the two second bending zone groups a30 are located on both sides of the first bending zone group a20 along the second direction Y;
bending subarea A10 comprises a first bending subarea A11 and a second bending subarea A12, a first bending zone group A20 comprises at least one first bending subarea A11, and a second bending zone group A30 comprises at least one second bending subarea A12;
in the first direction X, the length of the second bending sub-area a12 is greater than the length of the first bending sub-area a 11.
Specifically, with continued reference to fig. 1, the present embodiment provides a flexible printed circuit for a curved display module, the flexible printed circuit includes a flexible substrate 10, the flexible substrate 10 includes a bending region a1 and a main body region B1 connected to each other, and the bending region a1 is disposed on one side of the main body region B1 along a first direction X. Devices such as a driving chip for driving the curved display panel to display can be bound on the flexible substrate 10 and in the main body region B1, one side of the bending region a1, which is far away from the main body region B1, is bound on the curved display panel, and the driving chip is bent to the backlight side of the curved display panel through the bending region a1 in the flexible circuit board, so that the screen occupation ratio of the curved display panel is improved.
The bending region a1 includes a plurality of independent bending sub-regions a10, a plurality of bending sub-regions a10 are arranged along a second direction Y, and a side of each bending sub-region a10 away from the main body region B1 is bound on the display panel, wherein the first direction X intersects with the second direction Y, and optionally, the first direction X is perpendicular to the second direction Y. Bending zone a1 comprises a first bending zone group a20 and two second bending zone groups a30, the two second bending zone groups a30 are located on both sides of the first bending zone group a20 in the second direction Y, bending zone a10 comprises a first bending zone a11 and a second bending zone a12, the first bending zone group a20 comprises at least one first bending zone a11, and the second bending zone group a30 comprises at least one second bending zone a12, i.e. second bending zone a12 is located on both sides of bending zone a1 in the second direction Y.
Fig. 2 is a schematic structural diagram of a curved display module according to the present invention, and referring to fig. 2, a display panel in the curved display module is a curved display panel 100, and the curved display panel 100 is an arc structure. Since fig. 2 is a two-dimensional view, a side surface of the side where the curved display panel 100 and the flexible wiring board are bonded in fig. 2 is schematically curved. The side of the flexible circuit board away from the body region B1 of the bending region a1 is bound to the side of the curved display panel 100 in the bending state, so that when the bending region a1 between the connection curved display panel 100 and the body region B1 in the flexible circuit board is bent, since the curved display panel 100 has a curved structure, in the flexible printed circuit board, the distance between the portion of the body region B1 located in the middle region and the curved display panel 100 is less than the distance between the portion of the body region B1 located in the regions on both sides of the body region B1 along the second direction Y and the curved display panel 100, the stress in inflection region a1 on both sides in second direction Y is greater than the stress in the middle region of inflection region a1, that is, when the bending region a1 in the flexible circuit board is bent, along the second direction Y, the pulling force applied to the second bending sub-region a12 in the second bending region group a30 located on both sides of the first bending region group a20 is greater than the pulling force applied to the first bending sub-region a11 in the first bending region group a 20. In the first direction X, the length of the second bending subarea a12 is greater than that of the first bending subarea a11, and by increasing the length of the second bending subarea a12, when the bending subarea a1 is bent in the flexible circuit board, the pulling force applied to the second bending subarea a12 can be relieved, so that the risk of peeling and damage between the flexible circuit board and the curved-surface display panel caused by the overlarge pulling force applied to the second bending subarea a12 when the flexible circuit board is bent is effectively reduced.
Note that the flexible substrate 10 may be a unitary structure, and in order to illustrate the positional relationship between the bending region a1 and the body region B1 in fig. 1, the bending region a1 and the body region B1 are illustrated by different filling patterns.
It should be noted that fig. 1 exemplarily shows that the first bending region group a20 includes at least three first bending sub-regions a11, and the second bending region group a30 includes one second bending sub-region a12, in other embodiments of the present invention, the number of the first bending sub-regions a11 in the first bending region group a20 and the number of the second bending sub-regions a12 in the second bending region group a30 may be set according to actual process requirements, and the number of the second bending sub-regions a12 in the two second bending region groups a30 may be different, which is not repeated herein.
With continued reference to fig. 1, optionally, wherein, along the first direction X, bend sub-region a10 includes a first edge a10a and a second edge a10B disposed opposite to each other, the first edge a10a is located on a side of bend sub-region a10 away from body region B1, and the second edge a10B is located at a boundary where bend sub-region a10 and body region B1 intersect;
the second edges A10b of the bending subareas A10 on the flexible circuit board are all positioned on the same straight line.
Specifically, along the first direction X, the bending sub-region a10 includes a first edge a10a and a second edge a10B that are disposed opposite to each other, the second edge a10B is located at the intersection of the bending sub-region a10 and the body region B1, and the second edges a10B of the bending sub-regions a10 are all located on the same straight line, that is, the second edge a10B of the first bending sub-region a11 and the second edge a10B of the second bending sub-region a12 are all located on the same straight line, so that the second bending sub-region a12 with the increased length relative to the first bending sub-region a11 does not affect the disposed area of the body region B1, and the device disposition in the body region B1 is facilitated.
It should be noted that, in the flexible printed circuit board provided in this embodiment, the second edges a10b of the bending subareas a10 on the flexible printed circuit board may be approximately located on a straight line.
Fig. 3 is a schematic plane structure diagram of another flexible circuit board provided by the present invention, referring to fig. 3, optionally, wherein, along the first direction X, the bending sub-region a10 includes a first edge a10a and a second edge a10B that are oppositely disposed, the first edge a10a is located on a side of the bending sub-region a10 away from the body region B1, and the second edge a10B is located at a boundary between the bending sub-region a10 and the body region B1;
the first edges a10a of the bending sub-areas a10 all lie on the same line.
Specifically, with reference to fig. 3, along the first direction X, the bending sub-area a10 includes a first edge a10a and a second edge a10B that are disposed opposite to each other, the first edge a10a is located on a side of the bending sub-area a10 away from the main body area B1, and a side of the bending sub-area A1 away from the main body area B1 is bound to the display panel, that is, the first edge a10a of the bending sub-area a10 is bound to the display panel, and the first edges a10a of the bending sub-area a10 are all located on the same straight line.
It should be noted that, in the flexible printed circuit board provided in this embodiment, the first edges a10a of the bending subareas a10 on the flexible printed circuit board may be approximately located on a straight line.
Fig. 4 is a schematic plan view of another flexible circuit board provided by the present invention, referring to fig. 4, optionally, wherein the bending region a1 further includes two third bending region groups a40, and the two third bending region groups a40 are respectively located between the first bending region group a20 and the two second bending region groups a 30;
bending subregion a10 further comprises a third bending subregion a13, the third region of bending group a40 comprising at least one third bending subregion a 13;
in the first direction X, the length of the third bending sub-region a13 is greater than the length of the first bending sub-region a11 and is less than the length of the second bending sub-region a 12.
Specifically, when the bending region a1 in the flexible circuit board is bent, the stress applied to both sides of the bending region a1 in the second direction Y is the largest, and the stress applied to the bending region a1 closer to the middle is the smallest, that is, when the bending region a1 in the flexible circuit board is bent, the pulling force applied to the second bending sub-region a12 in the second bending region group a30 is greater than the pulling force applied to the third bending sub-region a13 in the third bending region group a40, and the pulling force applied to the third bending sub-region a13 in the third bending region group a40 is greater than the pulling force applied to the first bending sub-region a11 in the first bending region group a 20. In the first direction X, the length of the third bending subarea a13 is greater than the length of the first bending subarea a11 and less than the length of the second bending subarea a12, the greater the pulling force is, the greater the increased length of the bending subarea a10 is, and the risk of peeling and breakage between the flexible circuit board and the curved display panel when the flexible circuit board is bent is further reduced.
It should be noted that, this embodiment exemplarily shows that the bending region a1 includes a first bending region group a20, a second bending region group a30, and a third bending region group a40, and in the first direction X, the length of the third bending sub-region a13 is greater than the length of the first bending sub-region a11 and smaller than the length of the second bending sub-region a12, and in other embodiments of the present invention, other bending region groups may also be included, where the bending sub-region a10 having other lengths is included in the bending region group, so that in the second direction Y, the lengths of the bending sub-regions a10 located at two sides of the bending region a1 are the largest, and the length of the bending sub-region a10 located closer to the middle of the bending region a1 is the smallest, which the present invention is not described herein again.
With continued reference to fig. 4, optionally, each bending sub-region a10 on the flexible printed circuit board includes a first edge a10a extending along the second direction Y, and the first edge a10a is located on a side of the bending sub-region a10 away from the main body region B1;
the first edges a10a of the bending subareas a10 on the flexible circuit board are all positioned on the same straight line or approximately on the same straight line.
Specifically, each bending sub-area a10 includes a first edge a10a located on a side of the bending sub-area a10 away from the main body area B1, the first edges a10a of the bending sub-areas a10 are all located on the same straight line, the first edges a10a of the bending sub-areas a10 are bound on the display panel, the first edges a10a of the bending sub-areas a10 are all located on the same straight line, the flexible circuit board can be bound on the display panel through one-time binding process, the process is reduced, and the production efficiency is effectively improved.
Optionally, with continued reference to fig. 4, each bending sub-region a10 further includes a second edge a10B located at the intersection of bending sub-region a10 and body region B1, and second edge a10B of each bending sub-region a10 forms a bend line such that, in second direction Y, the length of bending sub-region a10 located on both sides of bending region A1 is the largest and the length of bending sub-region a10 located closer to the middle of bending region A1 is the smallest. It should be noted that fig. 4 exemplarily shows that the second edge a10b of each bending sub-area a10 forms a bending line, in other embodiments of the present invention, the second edge a10b of each bending sub-area a10 may also be in other shapes, for example, referring to fig. 5, fig. 5 is a schematic plane structure diagram of still another flexible circuit board provided by the present invention, and the second edge a10b of each bending sub-area a10 forms an arc line.
Fig. 6 is a schematic plan structure diagram of another flexible printed circuit board provided by the present invention, referring to fig. 6, optionally, wherein, along the second direction Y, the second bending sub-area a12 includes a third edge a10c and a fourth edge a10d that are oppositely disposed, the third edge a10c is located on a side of the second bending sub-area a12 away from the first bending area group a20, and the fourth edge a10d is located on a side of the second bending sub-area a12 close to the first bending area group a 20;
the second bending sub-area a12 comprises notches 20, the third edge a10c being recessed towards the direction close to the first bending area group a20 forming at least one notch 20, or/and the fourth edge a10d being recessed away from the first bending area group a20 forming at least one notch 20.
Specifically, with continued reference to fig. 6, the second bending subregion a12 further includes a third edge a10c located on a side of the second bending subregion a12 away from the first bending area group a20, and a fourth edge a10d located on a side of the second bending subregion a12 close to the first bending area group a20, and the third edge a10c is recessed toward a direction close to the first bending area group a20 to form at least one notch 20, or/and the fourth edge a10d is recessed toward a direction away from the first bending area group a20 to form at least one notch 20, so that when the bending area A1 in the flexible circuit board is bent, the pulling force applied to the second bending subregion a12 is further alleviated, and thus the risk of peeling breakage between the flexible circuit board and the curved display panel due to the excessive pulling force applied to the second bending subregion a12 when the flexible circuit board is bent is further reduced.
It should be noted that fig. 6 exemplarily shows that the third edge a10c and the fourth edge a10d in the second bending sub-area a12 are both provided with the notch 20, and the third edge a10c and the fourth edge a10d in the second bending sub-area a12 are both provided with one notch 20, in other embodiments of the present invention, the fourth edge a10d in the second bending sub-area a12 may not be provided with the notch 20, or the third edge a10c and the fourth edge a10d in the second bending sub-area a12 may also be provided with other numbers of notches 20, which is not repeated herein.
Fig. 7 is a schematic plan view of another flexible printed circuit board provided by the present invention, referring to fig. 7, in which, alternatively, the second bending subregion a12 includes at least one first hole 30, and the first hole 30 penetrates through the flexible substrate 10 in a direction perpendicular to the flexible substrate 10;
the second bending subarea a12 comprises a third edge a10c, the third edge a10c being located on the side of the second bending subarea a12 remote from the first bending area group a 20;
the second bending subregion a12 comprises at least one protrusion 40, and a third edge a10c protrudes in the second direction Y away from the first bending region group a20 to form the protrusion 40;
the first hole 30 corresponds to the boss 40, and the boss 40 is provided around a portion of the first hole 30 corresponding thereto.
Specifically, with reference to fig. 7, the second bending subregion a12 includes at least one first hole 30, and in a direction perpendicular to the flexible substrate 10, the first hole 30 penetrates through the flexible substrate 10, and when the bending region a1 in the flexible circuit board is bent, the pulling force applied to the second bending subregion a12 is further alleviated, so that the risk of peeling and breaking between the flexible circuit board and the curved display panel due to an excessive pulling force applied to the second bending subregion a12 when the flexible circuit board is bent is further reduced.
The second bending subarea a12 comprises a third edge a10c, the third edge a10c is located on one side of the second bending subarea a12, which is far away from the first bending area group a20, the third edge a10c protrudes towards the direction far away from the first bending area group a20 to form a protrusion 40, the first hole 30 corresponds to the protrusion 40, and the protrusion 40 is partially arranged around the first hole 30 corresponding to the first hole, the protrusion 40 effectively increases the space for arranging parts such as routing lines in the second bending subarea a12, and the arrangement of the first hole 30 is prevented from influencing the arrangement of the parts such as routing lines in the second bending subarea a 12.
It should be noted that fig. 7 exemplarily shows that the first hole 30 is an elliptical hole, the shape of the protruding portion 40 matches the shape of the first hole 30, and in other embodiments of the present invention, the first hole 30 may also be set to be a hole with another shape according to actual process requirements, which is not described herein again.
Fig. 8 is a schematic plan view of another flexible printed circuit provided in the present invention, and referring to fig. 8, optionally, the flexible printed circuit further includes a plurality of traces 50 disposed on one side of the flexible substrate;
the first bending sub-area a11 is provided with a plurality of traces 50, and the second bending sub-area a12 is not provided with the traces 50.
Specifically, the flexible printed circuit further includes a plurality of traces 50 disposed on one side of the flexible substrate, where the traces 50 are used to connect the display component in the display panel and the device such as the driving chip disposed on the flexible printed circuit, so that the display component can be driven to display through the device such as the driving chip. When the bending area a1 in the flexible circuit board is bent, the pulling force applied to the second bending sub-area a12 in the second bending area group a30 is greater than the pulling force applied to the first bending sub-area a11 in the first bending area group a20, and the risk of peeling and breakage between the second bending sub-area a12 and the curved display panel is easily caused due to the excessive pulling force applied to the second bending sub-area a 12. The flexible printed circuit board is provided with a plurality of wires 50 on the first bending sub-area A11, the wires 50 are not arranged on the second bending sub-area A12, and when the second bending sub-area A12 and the curved display panel are peeled off and damaged, the wires 50 are not broken.
Fig. 9 is a schematic plan view of another flexible printed circuit board according to the present invention, and referring to fig. 9, optionally, the second bending subarea a12 is a louver structure having a plurality of leaf segments 61, and in one second bending subarea a12, the plurality of leaf segments 61 extend along the first direction X and are arranged along the second direction Y.
Specifically, with reference to fig. 9, the second bending sub-area a12 is a louver structure having a plurality of leaf segments 61, the leaf segments 61 extend along the first direction X and are arranged along the second direction Y, a gap exists between two adjacent leaf segments 61, and when the bending area a1 in the flexible circuit board is bent, the pulling force applied to the second bending sub-area a12 can be further alleviated, so that the risk of peeling and breaking between the flexible circuit board and the curved display panel caused by an excessive pulling force applied to the second bending sub-area a12 when the flexible circuit board is bent is further reduced.
With continued reference to FIG. 9, optionally, wherein in one second bending sub-area A12, the number of sheet segments 61 is 5-10;
the width of the sheet segment 61 in the second direction Y is 2-3 nm.
It is to be understood that, in the second bending sub-area a12 shown in the present embodiment, the number of the sheet segments 61 is 5 to 10, and the width of each sheet segment 61 along the second direction Y is 2 to 3nm, in other embodiments of the present invention, the number of the sheet segments 61 in each second bending sub-area a12 may also be other values, and the width of each sheet segment 61 along the second direction Y may be set to other values according to actual production requirements, which is not described in detail herein.
Fig. 10 is a schematic plane structure view of another curved display module according to the present invention, and referring to fig. 10, the present embodiment provides a curved display module, including: the display device comprises a curved display panel 100 and a flexible circuit board 200, wherein the flexible circuit board 200 is a flexible circuit board provided by any one of the above embodiments of the present invention;
the curved display panel 100 includes a bending axis 110, the bending axis 110 extending along a first direction X;
the flexible circuit board 200 is bonded to one side of the curved display panel 100 along the first direction X, and a side of the bending region a1 away from the body region B1 is bonded to the curved display panel 100.
Specifically, with continued reference to fig. 10, the curved display module provided in this embodiment includes a curved display panel 100 and a flexible circuit board 200. The curved display panel 100 includes a bending axis 110, the bending axis 110 extends along a first direction X, the curved display panel 100 is bent along the bending axis 110, the flexible circuit board 200 is bound to one side of the curved display panel 100 along the first direction X, and one side of the bending region a1 away from the body region B1 is bound to the curved display panel 100, and illustratively, one side of the bending region a1 away from the body region B1 is bound to a substrate in the curved display panel 100.
In a case where the curved display panel 100 is bent, a side of the flexible circuit board, which is away from the body region B1, of the bending region a1 is bound to a side of the curved display panel 100 in a bent state, so that when the bending region a1, which connects the curved display panel 100 and the body region B1, of the flexible circuit board is bent, since the curved display panel 100 has a curved structure, a distance between a portion of the body region B1 located at a middle region and the curved display panel 100 is smaller than a distance between portions of the body region B1 located at two sides in the second direction Y and the curved display panel 100, and therefore, stress at two sides in the second direction Y in the bending region a1 is greater than stress at the middle region of the bending region a 1.
Bending zone a1 comprises a plurality of bending sub-zones a10 which are independent of each other, a plurality of bending sub-zones a10 are arranged along the second direction Y, bending zone a1 comprises a first bending zone group a20 and two second bending zone groups a30, two second bending zone groups a30 are located on both sides of the first bending zone group a20 along the second direction Y, bending sub-zone a10 comprises a first bending sub-zone a11 and a second bending sub-zone a12, the first bending zone group a20 comprises at least one first bending sub-zone a11, the second bending zone group a30 comprises at least one second bending sub-zone a12, i.e. second bending sub-zone a12 is located on both sides of bending zone a1 along the second direction Y, in the first direction X, the length of second bending sub-zone a12 is greater than the length of the first bending sub-zone a11, by increasing the length of second bending sub-zone a12, the bending sub-zone a1 in the flexible circuit board relieves the bending sub-zone a12, thereby reducing the effective bending force exerted on the flexible circuit board, the second bending sub-region a12 is subjected to an excessive pulling force, which may cause peeling damage between the second bending sub-region a12 and the curved display panel.
Note that the bending axis 110 in fig. 10 is used to illustrate the bending direction of the curved display panel 100 and the positional relationship between the flexible printed circuit 200 and the curved display panel 100, and there is no limitation that one bending axis 110 is used for bending in the curved display panel 100. Fig. 10 only exemplarily shows that the curved display panel 100 includes one bending axis 110, in other embodiments of the present invention, the curved display panel 100 may further include other numbers of bending axes 110, which is not described herein again.
The embodiment provides a curved surface display device, which comprises the curved surface display module.
Referring to fig. 11, fig. 11 is a schematic plane structure diagram of a curved surface display device according to the present invention. The curved display device 1000 shown in fig. 11 includes a curved display module 000, wherein the curved display panel is the curved display module 000 according to any of the embodiments of the present invention. The curved display device 1000 is described only by taking a mobile phone as an example in the embodiment of fig. 11, and it should be understood that the curved display device provided in the embodiment of the present invention may be other curved display devices with a display function, such as an on-vehicle instrument panel, a watch, a computer, a television, and a wearable device, and the present invention is not limited thereto. The curved surface display device provided by the embodiment of the invention has the beneficial effects of the curved surface display module provided by the embodiment of the invention, and specific descriptions of the curved surface display module in the above embodiments can be specifically referred to, and the detailed description of the embodiment is omitted here.
According to the embodiment, the flexible circuit board, the curved surface display module and the curved surface display device provided by the invention at least realize the following beneficial effects:
the invention provides a flexible circuit board, which is used for a curved surface display module and comprises a flexible substrate, wherein the flexible substrate comprises a bending area and a main body area which are connected, and the bending area is arranged on one side of the main body area along a first direction. The bending area comprises a plurality of bending sub-areas which are mutually independent, the plurality of bending sub-areas are arranged along the second direction, and one side, far away from the main body area, of each bending sub-area is bound on the curved surface display panel. The bending sub-area comprises a first bending sub-area and a second bending sub-area, the first bending sub-area is arranged in the middle area of the bending area, and the second bending sub-area is arranged on two sides of the bending area along the second direction. The display panel in the curved surface display module is a curved surface display panel which is of a curved surface structure, one side of the bending area in the flexible circuit board, which is far away from the main body area, is bound to one side of the curved surface display panel in a bending state, so that when the bending region between the display panel and the main body region is bent, because the display panel is in a cambered surface structure, in the flexible circuit board, the distance between the part of the main body area positioned in the middle area and the curved surface display panel is less than the distance between the part of the main body area positioned in the two sides along the second direction and the curved surface display panel, the stress at the two sides of the bending area along the second direction is larger than the stress at the middle area of the bending area, namely when the bending area in the flexible circuit board is bent, the pulling force borne by the second bending subareas in the second bending area groups positioned at the two sides of the first bending area group along the second direction is larger than the pulling force borne by the first bending subareas in the first bending area group. In the first direction, the length that the subregion was buckled to the second is greater than the length of the subregion of first buckling, through increasing the length that the subregion was buckled to the second for when the subregion was buckled in the flexible circuit board, the pulling force that the subregion received was buckled to the second can be alleviated, thereby when effectively reducing the flexible circuit board and buckling, the pulling force that the subregion received was buckled to the second caused the risk that takes place to peel off the damage between its and the curved surface display panel excessively.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (12)
1. The utility model provides a flexible circuit board for curved surface display module assembly which characterized in that includes: a flexible substrate;
the flexible substrate comprises a bending area and a main body area which are connected, and the bending area is arranged on one side of the main body area along a first direction;
the bending area comprises a plurality of mutually independent bending sub-areas which are arranged along a second direction, wherein the first direction and the second direction are intersected;
the bending area comprises a first bending area group and two second bending area groups, and the two second bending area groups are positioned on two sides of the first bending area group along the second direction;
the bending subareas comprise a first bending subarea and a second bending subarea, the first bending area group comprises at least one first bending subarea, and the second bending area group comprises at least one second bending subarea;
in the first direction, the length of the second bending subarea is greater than that of the first bending subarea.
2. The flexible circuit board of claim 1,
along the first direction, the bending sub-region comprises a first edge and a second edge which are oppositely arranged, the first edge is positioned on one side of the bending sub-region far away from the main body region, and the second edge is positioned at the intersection of the bending sub-region and the main body region;
the second edges of the bending sub-regions are all located on the same straight line.
3. The flexible circuit board of claim 1,
along the first direction, the bending sub-region comprises a first edge and a second edge which are oppositely arranged, the first edge is positioned on one side of the bending sub-region far away from the main body region, and the second edge is positioned at the intersection of the bending sub-region and the main body region;
the first edges of the bending sub-regions are all located on the same straight line.
4. The flexible circuit board of claim 1,
the bending area also comprises two third bending area groups, and the two third bending area groups are respectively positioned between the first bending area group and the two second bending area groups;
the bending subarea also comprises a third bending subarea, and the third bending area group comprises at least one third bending subarea;
in the first direction, the length of the third bending sub-region is greater than that of the first bending sub-region and less than that of the second bending sub-region.
5. The flexible circuit board of claim 4, wherein:
the bending sub-region comprises a first edge extending along the second direction, and the first edge is positioned on one side of the bending sub-region far away from the main body region;
the first edges of the bending sub-regions are all located on the same straight line.
6. The flexible circuit board of claim 1,
along the second direction, the second bending subarea comprises a third edge and a fourth edge which are oppositely arranged, the third edge is positioned on one side, far away from the first bending area group, of the second bending subarea, and the fourth edge is positioned on one side, close to the first bending area group, of the second bending subarea;
the second bending area comprises a notch, and the third edge is sunken towards the direction close to the first bending area group to form at least one notch, or/and the fourth edge is sunken towards the direction far away from the first bending area group to form at least one notch.
7. The flexible circuit board of claim 1,
the second bending subarea comprises at least one first hole which penetrates through the flexible substrate in the direction vertical to the flexible substrate;
the second bending subarea comprises a third edge, and the third edge is positioned on one side of the second bending subarea far away from the first bending area group;
the second bending subarea comprises at least one convex part, and the third edge protrudes towards the direction far away from the first bending area group to form the convex part;
the first hole corresponds to the boss, and the boss is partially disposed around the first hole corresponding thereto.
8. The flexible circuit board according to claim 1, further comprising a plurality of traces disposed on one side of the flexible substrate;
the first bending sub-area is provided with a plurality of wires, and the second bending sub-area is not provided with the wires.
9. The flexible circuit board of claim 8,
the second bending subarea is of a shutter structure with a plurality of blade sections, and in one second bending subarea, the blade sections extend along the first direction and are arranged along the second direction.
10. The flexible circuit board of claim 9,
in one second bending subarea, the number of the blade segments is 5-10;
the width of the sheet segment along the second direction is 2-3 nm.
11. The utility model provides a curved surface display module assembly which characterized in that includes: a curved display panel and a flexible circuit board, wherein the flexible circuit board is the flexible circuit board of any one of claims 1-10;
the curved display panel comprises a bending shaft, and the bending shaft extends along the first direction;
the flexible circuit board is bound on one side of the curved surface display panel along the first direction, and one side, far away from the main body area, of the bending area is bound on the curved surface display panel.
12. A curved display device comprising the curved display module of claim 11.
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| CN202011447996.2A CN112466216B (en) | 2020-12-09 | 2020-12-09 | Flexible circuit board, curved surface display module and curved surface display device |
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