CN112102723A - Display module, manufacturing method thereof and display device - Google Patents
Display module, manufacturing method thereof and display device Download PDFInfo
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- CN112102723A CN112102723A CN202010969786.3A CN202010969786A CN112102723A CN 112102723 A CN112102723 A CN 112102723A CN 202010969786 A CN202010969786 A CN 202010969786A CN 112102723 A CN112102723 A CN 112102723A
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- circuit board
- flexible circuit
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- G—PHYSICS
- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
- H05K1/0281—Reinforcement details thereof
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Abstract
The invention provides a display module, a manufacturing method thereof and a display device. The display module, the manufacturing method thereof and the display device provided by the invention can solve the problem of breakage of the flexible circuit board caused by stress to a certain extent.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module, a manufacturing method of the display module and a display device.
Background
With the development of intelligent equipment, the requirement on the narrow frame of the display screen is higher and higher.
Generally, an edge region of the display panel is bent from the display side to the backlight side opposite to the display side, so that a bent portion (also referred to as a Pad Bending region) is formed in the edge region of the display panel.
In order to reduce the lower frame of the display screen, the minimum Bending radius of Pad bonding in the future tends to be reduced, and accordingly, the minimum Bending radius of a Flexible Printed Circuit (FPC) is also reduced, but the reduction of the Bending radius brings greater strain pressure to the Flexible Circuit, and the Flexible Circuit is easy to break.
Disclosure of Invention
In view of the above, an embodiment of the invention provides a display module, a manufacturing method thereof and a display device to solve the above problems to some extent.
In view of the above, a first aspect of the embodiments of the present invention provides a display module, which includes a flexible circuit board, where a surface of the flexible circuit board is provided with at least one groove, and an extending direction of the groove is perpendicular to a plane where a bending radius of the flexible circuit board is located.
Optionally, the flexible circuit board is at least one of a display flexible circuit board or a touch flexible circuit board.
Optionally, the display module further includes a display panel, the flexible circuit board includes a first bending portion, and the first bending portion faces one surface of the display panel and is provided with the groove.
Optionally, the display module further includes a cover plate, the cover plate includes a bent edge corresponding to the position where the flexible circuit board is disposed, the flexible circuit board includes a second bent portion, and the groove is disposed on a surface of the second bent portion facing the bent edge.
Optionally, the number of the grooves is multiple, and the grooves are arranged in parallel at equal intervals.
Optionally, the grooves are disposed on both surfaces of the flexible circuit board.
Optionally, all the grooves provided on the two surfaces of the flexible circuit board have orthographic projections on the flexible circuit board not overlapping each other.
Optionally, the flexible circuit board includes a first surface and a second surface, the groove disposed on the first surface is a first groove, and the groove disposed on the second surface is a second groove;
the number of the first grooves and the number of the second grooves are multiple; the orthographic projection of the first groove on the flexible circuit board is a first projection, the orthographic projection of the second groove on the flexible circuit board is a second projection, and the first projections and the second projections are staggered.
Optionally, the plurality of first grooves are divided into at least two first groove groups according to a first number, the first grooves in each first groove group are arranged in parallel according to a first interval, and an orthographic projection of each first groove group on the flexible circuit board is a first projection group;
the plurality of second grooves are divided into at least two second groove groups according to a second number, the second grooves in each second groove group are arranged in parallel according to a second interval, and the orthographic projection of each second groove group on the flexible circuit board is a second projection group;
at least two first projection groups and at least two second projection groups are formed on the flexible circuit board alternately.
Optionally, the cross-sectional shape of the first groove group in a plane where the bending radius of the flexible circuit board is located is a wave shape; the section of the second groove group in the plane of the bending radius of the flexible circuit board is wave-shaped.
A second aspect of the embodiments of the present invention provides a display module, including a flexible circuit board, where a bending radius of a bending portion of the flexible circuit board is greater than a minimum bending radius of the flexible circuit board.
Optionally, the display module further includes a display panel, the flexible circuit board includes a first bending portion corresponding to the position of the display panel, and a bending radius of the first bending portion is greater than a minimum bending radius of the flexible circuit board.
Optionally, the display module further includes a cover plate, the cover plate includes a bending edge corresponding to the position where the flexible circuit board is disposed, the flexible circuit board includes a second bending portion corresponding to the position of the bending edge, and a bending radius of the second bending portion is greater than a minimum bending radius of the flexible circuit board.
The third aspect of the embodiment of the invention provides a display device, which comprises the display module.
A fourth aspect of the embodiments of the present invention provides a method for manufacturing a display module, including:
obtaining a flexible circuit board;
forming at least one groove on the flexible circuit board;
the extending direction of the groove is perpendicular to the plane where the bending radius of the flexible circuit board is located.
Optionally, forming at least one groove on the flexible circuit board includes:
forming a plurality of grooves which are parallel at equal intervals on the flexible circuit board;
the cross section of the grooves in the plane of the bending radius of the flexible circuit board is wavy.
A fifth aspect of the embodiments of the present invention provides a method for manufacturing a display module, including:
obtaining a flexible circuit board and a display panel;
attaching the flexible circuit board to a backlight side of the display panel;
and the bending radius of the bending part of the flexible circuit board after the attachment is finished is larger than the minimum bending radius of the flexible circuit board.
As can be seen from the above, in the display module, the manufacturing method thereof and the display device provided by the embodiment of the invention, the surface of the flexible circuit board is provided with at least one groove, the extending direction of which is perpendicular to the plane where the bending radius of the flexible circuit board is located, so that the surface stress of the flexible circuit board during bending can be dispersed by the groove, the minimum bending radius of the flexible circuit board can be further reduced, the flexible circuit board is not easy to break under a smaller bending radius, and the lower frame of the display screen can be narrowed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1A is a schematic cross-sectional view illustrating a touch display module;
fig. 1B is a schematic plan view illustrating a touch display module;
FIG. 1C is a schematic diagram illustrating a touch display module with cracks;
FIG. 1D illustrates a cross-sectional view of a touch panel in a flattened state;
fig. 2 is a schematic cross-sectional structure diagram of an embodiment of a display module according to an embodiment of the present invention;
fig. 3 is a schematic cross-sectional structure diagram of a display module according to another embodiment of the present invention;
fig. 4A is a schematic cross-sectional structure diagram of another embodiment of a display module according to an embodiment of the invention;
fig. 4B is a schematic plan view illustrating another embodiment of a display module according to an embodiment of the invention;
fig. 4C is a cross-sectional view of a display module according to an embodiment of the invention in a state where a touch panel is flattened;
fig. 5 is a schematic cross-sectional view illustrating a display module according to still another embodiment of the present invention;
fig. 6 is a schematic cross-sectional view illustrating a display module according to another embodiment of the invention;
fig. 7A is a schematic flowchart illustrating an embodiment of a method for manufacturing a display module according to an embodiment of the present invention;
fig. 7B is a schematic flowchart illustrating an embodiment of a method for manufacturing a display module according to an embodiment of the present invention;
fig. 8 is a schematic flow chart illustrating a manufacturing method of a display module according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The embodiment of the invention provides a display module which comprises a flexible circuit board, wherein the surface of the flexible circuit board is provided with at least one groove, and the extending direction of the groove is vertical to the plane of the bending radius of the flexible circuit board.
The display module assembly that this embodiment provided, through set up the extending direction on the surface at the flexible circuit board with the plane looks vertically at least one recess of the radius of buckling of flexible circuit board is located for the surface stress of flexible circuit board when buckling can be by the recess disperses, and then can reduce the minimum radius of buckling of flexible circuit board, makes the flexible circuit board also be difficult for breaking under the less radius of buckling, thereby makes the lower frame of display screen can narrow.
With the development of intelligent wearable equipment, the market share of the AMOLED display screen is higher and higher due to the advantages of flexibility and bendability. At present, in order to realize higher screen occupation ratio, designs of narrowing upper frames such as bang, water drops, in-screen punching and the like are introduced by various large brand manufacturers; in order to reduce the lower frame of the display screen, the minimum Bending radius of the future Pad Bending tends to be reduced.
Fig. 1A shows a schematic cross-sectional structure diagram of a touch display module.
As shown in fig. 1, the touch display module includes a display panel and a touch panel 12, the display panel includes a first portion 11A, a bent portion 11B and a second portion 11C (the three may be an integrated structure), the first portion 11A is connected to the second portion 11C through the bent portion 11B, the second portion 11C is located on a backlight side of the first portion 11C, and a flexible display circuit board 11D is disposed on the backlight side of the second portion 11C and is used for connecting to an external circuit.
The touch panel 12 is connected to an external circuit through a touch flexible circuit board 13, and is bonded to the display flexible circuit board 11D through an Anisotropic Conductive Film (ACF) 18, so as to be connected to the external circuit.
The touch panel 12 and the touch flexible circuit board 13 are connected to a connection part (FPC ON Glass, FOG)14 of the touch panel through the flexible circuit board. The first portion 11A of the display panel is attached to the touch panel 12 through an Adhesive layer 15, and optionally, the Adhesive layer 15 may be a special Adhesive (OCA) for gluing a transparent optical element.
A backlight surface of the first portion 11A of the display panel is provided with a heat dissipation layer 17, and optionally, the heat dissipation layer 17 may be a heat dissipation film (SCF). A foam layer 19 may also be provided between the heat dissipation layer 17 and the second portion 11C of the display panel. Optionally, a protection layer 16 is disposed on a surface of the bending portion 11B of the display panel away from the first portion 11A of the display panel, and optionally, the protection layer 16 may be an ultraviolet light curing type protection adhesive (such as polyester polyurethane adhesive, Micro coating layer, MCL for short).
As can be seen from fig. 1, if the minimum Bending radius of Pad Bending is continuously decreased in order to reduce the lower frame of the display screen, the minimum Bending radius of the Touch flexible circuit board (T-FPC)13 of the Touch panel (Touch Sensor)12 needs to be decreased, but the decrease of the minimum Bending radius brings a greater strain pressure to the Touch flexible circuit board (T-FPC), which is likely to cause fracture.
In some cases, as shown in fig. 1B, 1C and 1D, the T-FPC is bent and attached to the back of the display Panel (Panel) during Pad bonding, and the strain pressure in the Bending area becomes large; when the module is assembled, the T-FPC is further fixed on the back of the Panel by using an adhesive tape, the T-FPC is manually attached in the process, the strain pressure of the T-FPC is further increased due to more external influence factors, and the T-FPC is broken or the stress is transmitted to the position (also called T-FOG) of the connecting part 14 of the flexible circuit board and the touch Panel to be broken. Meanwhile, in the current module assembly process, the T-FPC needs to be manually fixed, and slight disturbance is conducted to the position (also referred to as T-FOG) of the connection portion 14 of the flexible circuit board and the touch panel, which causes the circuit in the touch panel 12 to be broken.
Fig. 2 is a schematic cross-sectional structural diagram of an embodiment of a display module according to an embodiment of the present invention.
As shown in fig. 2, the display module includes a touch flexible circuit board 32, at least one groove 321 is disposed on a surface of the touch flexible circuit board 32, and an extending direction of the groove 321 is perpendicular to a plane (for example, a cross section shown in fig. 2) where a bending radius of the touch flexible circuit board 32 is located (refer to fig. 4B).
The display module assembly that this embodiment provided sets up the extending direction through the surface at touch-control flexible circuit board with touch-control flexible circuit board's bending radius place plane looks vertically at least one recess for touch-control flexible circuit board when buckling surface stress can by the recess disperses, and then can reduce flexible circuit board's minimum bending radius, makes touch-control flexible circuit board also be difficult for breaking down under the less bending radius, thereby makes the lower frame of display screen can narrow.
Optionally, when the groove is formed in the touch flexible circuit board (T-FPC)32, the groove can be used to relieve the strain pressure caused by the reduction of the minimum bending radius of the T-FPC, and the groove can also be used to eliminate the fracture of the T-FOG end caused by the disturbance of the T-FPC in the module assembly process. Meanwhile, the improvement in the embodiment does not relate to the change of the module process flow, only relates to the appearance change of the T-FPC, and is easy to realize.
Alternatively, as shown in fig. 2, the number of the grooves 321 is multiple, and the multiple grooves 321 are arranged in parallel at equal intervals. Like this, the stress that produces on the whole touch-control flexible circuit board can evenly be dispersed to parallel arrangement's recess 321, and then prevents the emergence of fracture better.
As an alternative embodiment, as shown in fig. 3, the grooves 321A/321B are disposed on both surfaces of the touch flexible circuit board 32. Like this, all set up the recess on two surfaces for stress can be dispersed at two surfaces homoenergetic, and then prevents the emergence of fracture better.
Optionally, as shown in fig. 3, all the grooves 321A/321B disposed on two surfaces of the touch flexible circuit board 32 do not overlap with each other in orthographic projection on the touch flexible circuit board 32. Therefore, the groove is arranged at the same position in the projection plane of the flexible circuit board, the groove is prevented from being arranged on the two surfaces at the same position in the projection plane, and the flexible circuit board is prevented from being broken due to the fact that the thickness of the flexible circuit board at the position is too thin under the condition.
For example, as shown in fig. 3, the touch flexible circuit board 32 includes a first surface and a second surface, the groove disposed on the first surface is a first groove 321A, and the groove disposed on the second surface is a second groove 321B;
the number of the first grooves 321A and the number of the second grooves 321B are multiple; the orthographic projection of the first groove 321A on the touch flexible circuit board 32 is a first projection, the orthographic projection of the second groove 321B on the touch flexible circuit board 32 is a second projection, and the first projections and the second projections are staggered.
In this embodiment, the plurality of first projections and the plurality of second projections are staggered with each other, which may mean that the first projections and the second projections are alternately formed, that is, one second projection is formed between two adjacent first projections, and one first projection is formed between two adjacent second projections; the second projection is formed in the plurality of first projections in an inserting manner, the arrangement of the first projections and the second projections may be regular or irregular, and the specific arrangement mode is selected according to needs and is not limited herein.
As an alternative embodiment, as shown in fig. 4A, 4B and 4C, the touch flexible circuit board 32 includes a first surface and a second surface, the groove disposed on the first surface is a first groove 321A, and the groove disposed on the second surface is a second groove 321B;
the number of the first grooves 321A and the number of the second grooves 321B are multiple; the orthographic projection of the first groove 321A on the touch flexible circuit board 32 is a first projection, the orthographic projection of the second groove 321B on the touch flexible circuit board 32 is a second projection, and the first projections and the second projections are staggered;
the plurality of first grooves 321A are divided into at least two first groove groups according to a first number, the first grooves 321A in each first groove group are arranged in parallel according to a first interval, and an orthographic projection of each first groove group on the touch flexible circuit board 32 is a first projection group;
the second grooves 321B are divided into at least two second groove groups according to a second number, the second grooves 321B in each second groove group are arranged in parallel according to a second interval, and an orthographic projection of each second groove group on the touch flexible circuit board 32 is a second projection group;
at least two of the first projection groups and at least two of the second projection groups are alternately formed on the touch flexible circuit board 32.
Optionally, as shown in fig. 4A, 4B and 4C, a cross-sectional shape of the first groove group in a plane where a bending radius of the touch flexible circuit board 32 is located is a wave shape; the cross-sectional shape of the second groove group in the plane of the bending radius of the touch flexible circuit board 32 is a wave shape.
In the embodiment, the surface of the T-FPC is processed in a wavy manner, the wavy T-FPC effectively increases the surface area, relieves the strain pressure of the T-FPC in the bending process, is not easy to break, and is beneficial to reducing the minimum bending radius of the T-FPC and narrowing the lower frame of the display screen; the wavy surface is like a spring to buffer and absorb external interference factors during manual assembly, and fracture of the T-FOG end caused by disturbance of the T-FPC is relieved.
As an alternative embodiment, as shown in fig. 5, the display module includes a display panel 21, the touch flexible circuit board 32 includes a first bending portion 32A, and the first bending portion 32A faces one surface of the display panel 21 and is provided with the groove 321B. Thus, when the first bent portion 32A is bent, the groove 321B is located at the inner side, so that the stress can be better released.
As an alternative embodiment, as shown in fig. 5, the display module further includes a cover plate 50, the cover plate 50 includes a bent edge 51 corresponding to a position where the touch flexible circuit board 32 is disposed, the touch flexible circuit board 32 includes a second bent portion 32B, and one surface of the second bent portion 32B facing the bent edge 51 is provided with the groove 321A. Thus, when the second bent portion 32B is bent, the groove 321A is located at the inner side, so that the stress can be better released. Meanwhile, for a display screen with a curved surface at four sides, the normal bending path of the T-FPC can be changed by the bent lower frame, and the T-FPC can be bent in a special shape by arranging the second bending part 32B with the groove 321A, so that the strain pressure at the bending part of the T-FPC is relieved, and the problem of fracture of the T-FPC is solved.
It should be noted that some of the above embodiments are described by taking a touch flexible circuit board as an example, generally, some of the above embodiments are used in a flexible touch display panel, as shown in fig. 2, fig. 3, fig. 4A, and fig. 5, for the flexible touch display panel, a display flexible circuit board 24 is disposed on the backlight side of a second portion 23 of the display panel for connecting leads in the display panel to an external circuit, and the display flexible circuit board 24 does not need to be bent, and there is generally no stress problem. Meanwhile, based on the same inventive concept, the groove may be further provided at the bending part 22 of the display panel for reducing stress of the bending part.
In addition, it can be known that, for a liquid crystal display module (LCD), a lead in a display panel of the LCD needs to be connected to an external circuit through a display flexible circuit board (FPC), and the FPC in the LCD needs to be bent, so based on the same inventive concept, the same improvement can be performed on the display flexible circuit board in the liquid crystal display module, thereby reducing the probability of the display flexible circuit board breaking, and no further description is given here.
In one or more embodiments of the present invention, the display module may further include other components. For example, the display panel comprises a first part 21, a bent part 22 and a second part 23, the first part 21 is connected with the second part 23 of the display panel through the bent part 22, the second part 23 is positioned on the backlight side of the first part 21, and the backlight side of the second part 23 is provided with a display flexible circuit board 24 for connecting an external circuit.
The touch panel 31 is connected to an external circuit through a touch flexible circuit board 32, and is bonded to the display flexible circuit board 24 of the display panel through an Anisotropic Conductive Film (ACF) 42, so as to be connected to the external circuit.
The touch panel 31 and the touch flexible circuit board 32 are connected to a connection portion (FPC ON Glass, FOG)33 of the touch panel through the flexible circuit board. The first display panel portion 21 and the touch panel 31 are attached by an Adhesive layer 41, and optionally, the Adhesive layer 41 may be a special Adhesive (OCA) for gluing a transparent optical element.
A heat dissipation layer 43 is disposed on a backlight surface of the first portion 21 of the display panel, and optionally, the heat dissipation layer 43 may be a heat dissipation film (SCF). A foam layer 44 may also be disposed between the heat dissipation layer 43 and the display panel second portion 23. Optionally, a protection layer 45 is disposed on a side of the display panel bending portion 22 away from the display panel first portion 21, and optionally, the protection layer 45 may be an ultraviolet light curing type protection adhesive (for example, a polyester type polyurethane adhesive, Micro coating layer, MCL for short).
It should be noted that, in the above embodiments, the cross-sectional shape of the groove is exemplarily described as a triangle. It will be appreciated that the grooves are primarily intended to distribute stresses and their cross-sectional shape should not be limited. Any cross-sectional shape that can achieve a groove structure and disperse stress is included in the scope of the present invention.
Fig. 6 is a schematic cross-sectional structure diagram of a display module according to still another embodiment of the invention.
As shown in fig. 6, the display module includes a flexible circuit board 22/32, and a bending radius of a bending portion 22/32 of the flexible circuit board 22/32 is greater than a minimum bending radius of the flexible circuit board 22/32.
In the present embodiment, the minimum bending radius refers to the smallest bending radius of the material without damage or significant reduction of the life when the material is in operation, and is the smallest radius that can be bent without damage to the material. The smaller the minimum bend radius, the better the bending performance.
In the embodiment, the bending radius of the bending part of the flexible circuit board is set to be larger than the minimum bending radius of the flexible circuit board, the strain pressure of the material is reduced by enlarging the bending radius of the T-FPC, the method is simple, and the problem of T-FPC fracture can be solved.
Optionally, the display module further includes a display panel, the flexible circuit board includes a first bending portion corresponding to the position of the display panel, and a bending radius of the first bending portion is greater than a minimum bending radius of the flexible circuit board. In this way, by setting the bending radius of the first bending portion to be larger than the minimum bending radius of the flexible circuit board, the occurrence of breakage caused by stress of the first bending portion is prevented.
Optionally, the display module further includes a cover plate, the cover plate includes a bending edge corresponding to the position where the flexible circuit board is disposed, the flexible circuit board includes a second bending portion corresponding to the position of the bending edge, and a bending radius of the second bending portion is greater than a minimum bending radius of the flexible circuit board. In this way, by setting the bending radius of the second bending portion to be larger than the minimum bending radius of the flexible circuit board, the occurrence of fracture caused by stress of the second bending portion is prevented.
The embodiment of the invention also provides a display device, which comprises any embodiment or arrangement and combination of the embodiments of the display module.
The display device in this embodiment may be: any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
Fig. 7A is a schematic flowchart illustrating an embodiment of a method for manufacturing a display module according to an embodiment of the present invention.
As shown in fig. 7A, the method for manufacturing a display module includes:
step 602: obtaining a flexible circuit board;
step 604: forming at least one groove on the flexible circuit board;
the extending direction of the groove is perpendicular to the plane where the bending radius of the flexible circuit board is located.
According to the manufacturing method of the display module, the at least one groove which is perpendicular to the plane where the extending direction of the surface of the flexible circuit board is located is arranged on the surface of the flexible circuit board, so that the surface stress of the flexible circuit board during bending can be dispersed by the groove, the minimum bending radius of the flexible circuit board can be reduced, the flexible circuit board is not easy to break under smaller bending radius, and the lower frame of the display screen can be narrowed.
As an alternative embodiment, forming at least one groove on the flexible circuit board includes:
forming a plurality of grooves which are parallel at equal intervals on the flexible circuit board;
the cross section of the grooves in the plane of the bending radius of the flexible circuit board is wavy.
In the embodiment, the surface of the T-FPC is processed in a wavy manner, the wavy T-FPC effectively increases the surface area, relieves the strain pressure of the T-FPC in the bending process, is not easy to break, and is beneficial to reducing the minimum bending radius of the T-FPC and narrowing the lower frame of the display screen; the wavy surface is like a spring to buffer and absorb external interference factors during manual assembly, and fracture of the T-FOG end caused by disturbance of the T-FPC is relieved.
As an alternative embodiment, forming a plurality of equally spaced parallel grooves on the flexible circuit board includes:
forming a plurality of grooves with the wave-shaped cross section by adopting at least two patterning processes;
the shape of the opening of the Mask1 used in the previous patterning process is smaller than the shape of the opening of the Mask2 used in the subsequent patterning process.
The current T-FPC is composed of a lower copper-clad plate (PI/Glue/Cu) and an upper protective film (PI/Glue), in this embodiment, a wavy surface is obtained on the surface of the ordinary T-FPC by a two-step etching method (dry etching or wet etching may be adopted), and the preparation process is shown in fig. 7B.
It can be appreciated that the groove shape is made more in conformity with the wave shape by increasing the number of patterning processes.
Fig. 8 is a schematic flow chart illustrating a manufacturing method of a display module according to another embodiment of the present invention.
As shown in fig. 8, the method for manufacturing a display module includes:
step 702: obtaining a flexible circuit board and a display panel;
step 704: attaching the flexible circuit board to a backlight side of the display panel;
and the bending radius of the bending part of the flexible circuit board after the attachment is finished is larger than the minimum bending radius of the flexible circuit board.
In the embodiment, the bending radius of the bending part of the flexible circuit board is set to be larger than the minimum bending radius of the flexible circuit board, the strain pressure of the material is reduced by enlarging the bending radius of the T-FPC, the method is simple, and the problem of T-FPC fracture can be solved.
As an optional embodiment, the display module further includes a display panel, the flexible circuit board includes a first bending portion corresponding to a position of the display panel, and a bending radius of the first bending portion is greater than a minimum bending radius of the flexible circuit board. In this way, by setting the bending radius of the first bending portion to be larger than the minimum bending radius of the flexible circuit board, the occurrence of breakage caused by stress of the first bending portion is prevented.
Optionally, the display module further includes a cover plate, the cover plate includes a bending edge corresponding to the position where the flexible circuit board is disposed, the flexible circuit board includes a second bending portion corresponding to the position of the bending edge, and a bending radius of the second bending portion is greater than a minimum bending radius of the flexible circuit board. In this way, by setting the bending radius of the second bending portion to be larger than the minimum bending radius of the flexible circuit board, the occurrence of fracture caused by stress of the second bending portion is prevented.
The technical scheme of the invention is explained in detail in the above with reference to the accompanying drawings, and it is considered that in the prior art, the source and drain electrodes and the active layer are in different layers, so that the thickness of the substrate is large, and the manufacturing process is complex. According to the technical scheme, the source electrode, the drain electrode, the data line and the active layer can be prepared in the same layer by doping the copper nitride, so that the thickness of the array substrate is reduced, and the manufacturing process of the array substrate is simplified.
It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or there can be more than one intermediate layer or element. Like reference numerals refer to like elements throughout.
Those of ordinary skill in the art will understand that: the invention is not to be considered as limited to the specific embodiments thereof, but is to be understood as being modified in all respects, all changes and equivalents that come within the spirit and scope of the invention.
Claims (17)
1. The display module comprises a flexible circuit board, wherein at least one groove is formed in the surface of the flexible circuit board, and the extending direction of the groove is perpendicular to the plane where the bending radius of the flexible circuit board is located.
2. The display module of claim 1, wherein the flexible circuit board is at least one of a display flexible circuit board or a touch flexible circuit board.
3. The display module according to claim 1, wherein the display module further comprises a display panel, and the flexible circuit board comprises a first bending portion, and the groove is disposed on a surface of the first bending portion facing the display panel.
4. The display module according to claim 1, wherein the display module further comprises a cover plate, the cover plate comprises a bent edge corresponding to a position where the flexible circuit board is disposed, and the flexible circuit board comprises a second bent portion, and one surface of the second bent portion facing the bent edge is provided with the groove.
5. The display module assembly according to claim 1, wherein the number of the grooves is plural, and the plural grooves are arranged in parallel at equal intervals.
6. The display module according to claim 1, wherein the grooves are provided on both surfaces of the flexible circuit board.
7. The display module according to claim 6, wherein all the grooves provided on both surfaces of the flexible circuit board have orthographic projections on the flexible circuit board that do not overlap each other.
8. The display module according to claim 6, wherein the flexible circuit board comprises a first surface and a second surface, the groove disposed on the first surface is a first groove, and the groove disposed on the second surface is a second groove;
the number of the first grooves and the number of the second grooves are multiple; the orthographic projection of the first groove on the flexible circuit board is a first projection, the orthographic projection of the second groove on the flexible circuit board is a second projection, and the first projections and the second projections are staggered.
9. The display module according to claim 8, wherein the plurality of first grooves are divided into at least two first groove groups according to a first number, the first grooves in each first groove group are arranged in parallel according to a first interval, and an orthographic projection of each first groove group on the flexible circuit board is a first projection group;
the plurality of second grooves are divided into at least two second groove groups according to a second number, the second grooves in each second groove group are arranged in parallel according to a second interval, and the orthographic projection of each second groove group on the flexible circuit board is a second projection group;
at least two first projection groups and at least two second projection groups are formed on the flexible circuit board alternately.
10. The display module according to claim 9, wherein the first groove set has a wave-shaped cross-section in a plane of a bending radius of the flexible circuit board; the section of the second groove group in the plane of the bending radius of the flexible circuit board is wave-shaped.
11. A display module comprises a flexible circuit board, wherein the bending radius of the bending part of the flexible circuit board is larger than the minimum bending radius of the flexible circuit board.
12. The display module according to claim 11, wherein the display module further comprises a display panel, the flexible circuit board comprises a first bending portion corresponding to a position of the display panel, and a bending radius of the first bending portion is larger than a minimum bending radius of the flexible circuit board.
13. The display module according to claim 11, wherein the display module further comprises a cover plate, the cover plate comprises a bending edge corresponding to a position where the flexible circuit board is disposed, the flexible circuit board comprises a second bending portion corresponding to a position of the bending edge, and a bending radius of the second bending portion is greater than a minimum bending radius of the flexible circuit board.
14. A display device comprising a display module according to any one of claims 1-13.
15. A manufacturing method of a display module comprises the following steps:
obtaining a flexible circuit board;
forming at least one groove on the flexible circuit board;
the extending direction of the groove is perpendicular to the plane where the bending radius of the flexible circuit board is located.
16. The method of manufacturing of claim 15, wherein forming at least one groove on the flexible circuit board comprises:
forming a plurality of grooves which are parallel at equal intervals on the flexible circuit board;
the cross section of the grooves in the plane of the bending radius of the flexible circuit board is wavy.
17. A manufacturing method of a display module comprises the following steps:
obtaining a flexible circuit board and a display panel;
attaching the flexible circuit board to a backlight side of the display panel;
and the bending radius of the bending part of the flexible circuit board after the attachment is finished is larger than the minimum bending radius of the flexible circuit board.
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| CN202010969786.3A CN112102723A (en) | 2020-09-15 | 2020-09-15 | Display module, manufacturing method thereof and display device |
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| CN202010969786.3A CN112102723A (en) | 2020-09-15 | 2020-09-15 | Display module, manufacturing method thereof and display device |
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