CN217133926U

CN217133926U - Display module group capable of reducing bending stress of FPC

Info

Publication number: CN217133926U
Application number: CN202220747600.4U
Authority: CN
Inventors: 温武炎; 曾焕章
Original assignee: Truly Opto Electronics Ltd
Current assignee: Truly Opto Electronics Ltd
Priority date: 2022-04-01
Filing date: 2022-04-01
Publication date: 2022-08-05
Anticipated expiration: 2032-04-01

Abstract

The utility model discloses a display module group for reducing FPC bending stress, because the lower surface of the first copper layer in the bending area is covered with a thermosetting green oil layer, and the thermosetting green oil layer extends and covers part of the lower surface of the first copper layer in the golden finger area, namely the golden finger area is directly brushed by the thermosetting green oil layer, protective glue is coated between the thermosetting green oil layer in the golden finger area and the upper substrate and the lower substrate, thereby leading the bending starting point to reach the end of the protective glue in advance, the bending protruding position and the bending stress can be greatly reduced, thereby avoiding the binding position strain caused by the overlarge bending stress, FPC upwarp and other defects, the product reliability can be greatly improved, the production yield of the product can be improved, the production and assembly efficiency of the product can be greatly improved, thereby the production and manufacturing costs of the product can be greatly reduced, the competitiveness of the product can be improved, thereby meeting the increasing quality requirements of production enterprises.

Description

Display module group capable of reducing bending stress of FPC

Technical Field

The utility model relates to a liquid crystal display technology field, more specifically say, relate to a display module assembly who reduces FPC stress of buckling.

Background

At present, the FPC in a display screen for wearing an electronic product needs to be bent, the size of a bending protruding position directly influences the size of a whole machine frame, the size of the whole machine frame can influence the screen occupation ratio, the requirement on high screen occupation ratio is higher and higher, the requirement of a client on the bending protruding position of the FPC is lower and lower, the FPC in a traditional display screen comprises a golden finger area, a bending area and a body area, a small section of covering film layer is still reserved on the outer surface of the FPC in the golden finger area, so that the bending starting point of the bending area is positioned at the tail end of the covering film layer, at the moment, the bending protruding position and the bending stress are larger, the binding position of the golden finger area is damaged, the FPC is tilted and the like due to the overhigh bending stress, the reliability of the product can be greatly influenced, the production yield of the product is reduced, the production and assembly efficiency of the product can be greatly reduced, and the production and manufacturing cost of the product is greatly improved, the competitiveness of the product is reduced, and the increasing quality requirements of production enterprises cannot be met.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is how to reduce the bending protruding position and the bending stress, because the lower surface of the first copper layer in the bending area is covered with the thermosetting green oil layer, and the thermosetting green oil layer extends and covers part of the lower surface of the first copper layer in the golden finger area, i.e. the thermosetting green oil layer is directly brushed to the golden finger area, the thermosetting green oil layer in the golden finger area and the upper substrate and the lower substrate are coated with the protective glue, thereby the bending starting point is advanced to the end of the protective glue, the bending protruding position and the bending stress can be greatly reduced, thereby avoiding the binding position strain caused by the overlarge bending stress, the FPC tilting and other defects, the product reliability can be greatly improved, the production yield of the product can be improved, the production and assembly efficiency of the product can be greatly improved, thereby the production and manufacturing cost of the product can be greatly reduced, the competitiveness of the product can be improved, thereby meeting the increasing quality requirements of production enterprises.

The utility model discloses the technical problem that will solve realizes through following technical scheme:

in order to solve the technical problem, the utility model provides a display module assembly for reducing FPC bending stress, which comprises a lower substrate, an upper substrate and an FPC which are sequentially arranged from bottom to top, wherein the FPC comprises a golden finger area, a bending area and a body area which are sequentially connected from right to left, the FPC comprises a substrate layer and a first copper layer arranged below the substrate layer, the first copper layer of the FPC positioned in the golden finger area is bound on the upper surface of the upper substrate, the lower surface of the first copper layer positioned in the body area is covered with a first covering film layer, the upper surface of the substrate layer positioned in the body area is provided with a second copper layer, the upper surface of the second copper layer is covered with a second covering film layer, the lower surface of the first copper layer positioned in the bending area is covered with a thermosetting green oil layer, the thermosetting green oil layer extends and covers the lower surface of the first copper layer positioned in the golden finger area, and a protective adhesive is coated between the thermocuring green oil layer positioned in the golden finger area and the upper substrate and the lower substrate.

As the utility model provides a reduce FPC bending stress's a display module assembly's a preferred embodiment is located body district seted up at least one on the FPC and run through the perforation of first rete, first copper layer, substrate layer, second copper layer and second rete, fenestrate inner wall be provided with the heat-conducting layer of first copper layer and the contact of second copper layer.

As the utility model provides a reduce FPC stress of buckling's a display module assembly's a preferred embodiment, be provided with the heat conductor of being connected with outside heat conduction structure in the perforation, the heat conductor with the heat-conducting layer contacts.

As the utility model provides a reduce FPC bending stress's a display module assembly's a preferred embodiment, the upper surface of upper substrate is provided with the polaroid, the lower surface of infrabasal plate is provided with the bubble cotton.

As the utility model provides a reduce FPC bending stress's a display module assembly's a preferred embodiment, the cotton upper surface of bubble is provided with weak viscidity glue layer, the cotton lower surface of bubble is provided with strong viscidity glue layer.

As the utility model provides a reduce FPC bending stress's a display module assembly's an preferred embodiment, the cotton lower surface of bubble still is equipped with the PET layer, strong viscidity glue is located the lower surface on PET layer.

As a preferred embodiment of the display module for reducing the bending stress of the FPC provided by the present invention, the initial adhesion ratio of the strong adhesion glue layer to the weak adhesion glue layer is 2:1 to 50: 1.

As a preferred embodiment of the display module assembly that reduces FPC stress of buckling, weak viscidity glue layer with strong viscidity glue layer's viscidity is the same, the glue coating shape on weak viscidity glue layer is latticed, the glue coating shape on strong viscidity glue layer is the complete coating.

As the utility model provides a reduce FPC bending stress's a display module assembly's a preferred embodiment, the cotton surface of bubble is provided with the surface treatment layer that increases roughness.

As the utility model provides a reduce FPC and buckle an optimal implementation mode of display module assembly of stress, the surface treatment layer is dull polish processing or rhombus annular knurl.

The utility model discloses following beneficial effect has:

because the lower surface that is located the first copper layer of bending zone covers there is the green oil layer of thermosetting, and the green oil layer of thermosetting extends and covers the lower surface that partly lies in the first copper layer of golden finger district, the golden finger district is directly brushed to the green oil layer of thermosetting promptly, the green oil layer of thermosetting that lies in the golden finger district coats and has been glued with the protection between upper substrate and the infrabasal plate, thereby make the initial point of buckling arrive the end of protection glue in advance, the outstanding position of buckling and the stress of buckling can reduce by a wide margin, thereby avoid the too big bonding position that causes of stress of buckling to strain, defects such as FPC perk, product reliability also can improve by a wide margin, make the production yield of product improve, the production packaging efficiency of product also will improve by a wide margin, thereby the production and manufacturing cost of product have been reduced by a wide margin, the competitiveness of product has been improved, with this satisfies the ever-increasing quality requirement of production enterprise.

Drawings

In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.

Fig. 1 is the utility model provides a pair of reduce FPC stress of buckling's display module assembly's structural schematic.

Fig. 2 is a schematic structural view of embodiment 2.

Fig. 3 is a schematic structural view of embodiment 3.

Fig. 4 is a schematic structural diagram of the foam in fig. 3.

Fig. 5 is a schematic diagram of an improved structure of foam.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

The utility model provides a reduce FPC bending stress's display module assembly, it includes by lower base plate 1, upper substrate 2 and FPC3 that the order set gradually from bottom to top, FPC3 includes golden finger district 100, bending zone 200 and body district 300 that the order connects gradually from right side to left side in proper order, FPC3 includes substrate layer 31 and locates the first copper layer 32 of substrate layer 31 below, be located golden finger district 100 the first copper layer 32 of FPC3 is tied up in the upper surface of upper substrate 2, the lower surface that is located body district 300 the first copper layer 32 covers first cover film layer 33, the upper surface that is located body district 300 the substrate layer 31 is provided with second copper layer 34, the upper surface of second copper layer 34 covers second cover film layer 35, the lower surface that is located bending zone 200 the first copper layer 32 covers has thermosetting green oil layer 36, thermosetting green oil layer 36 extends and covers the lower surface that partly lies in the first copper layer 32 of gold district 100, the heat-cured green oil layer 36 in the golden finger area 100 is coated with a protective adhesive 4 between the upper substrate 2 and the lower substrate 1.

Since the lower surface of the first copper layer 32 at the inflection zone 200 is covered with the layer of thermosetting green oil 36, and the layer of thermally cured green oil 36 extends over and covers a portion of the lower surface of the first copper layer 32 in the gold finger region 100, that is, the thermal-cured green oil layer 36 is directly brushed to the gold finger area 100, the protective paste 4 is coated between the thermal-cured green oil layer 36 located in the gold finger area 100 and the upper substrate 2 and the lower substrate 1, thereby leading the bending starting point to reach the tail end of the protective glue 4 in advance, greatly reducing the bending protruding position and the bending stress, thereby avoiding the defects of pull damage of binding position, tilting of FPC3 and the like caused by overlarge bending stress, greatly improving the reliability of the product, the production yield of the product is improved, the production assembly efficiency of the product is greatly improved, therefore, the production and manufacturing cost of the product is greatly reduced, and the competitiveness of the product is improved, so that the increasing quality requirements of production enterprises are met.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. The invention is described in detail below with reference to the drawings, wherein examples of the embodiments are shown in the drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

Example 1

Please refer to fig. 1, which is a display module for reducing the bending stress of the FPC according to the present invention, and includes a lower substrate 1, an upper substrate 2 and an FPC3 sequentially disposed from bottom to top, the FPC3 includes a gold finger area 100, a bending area 200 and a body area 300 sequentially connected from right to left, the FPC3 includes a substrate layer 31 and a first copper layer 32 disposed under the substrate layer 31, the first copper layer 32 of the FPC3 located in the gold finger area 100 is bound to the upper surface of the upper substrate 2, the lower surface of the first copper layer 32 located in the body area 300 is covered with a first covering film layer 33, the upper surface of the substrate layer 31 located in the body area 300 is provided with a second copper layer 34, the upper surface of the second copper layer 34 is covered with a second covering film layer 35, the lower surface of the first copper layer 32 located in the bending area 200 is covered with a thermosetting green oil layer 36, the thermosetting green oil layer 36 extends and covers a part of the lower surface of the first copper layer 32 located in the gold finger area 100, the heat-cured green oil layer 36 in the golden finger area 100 is coated with a protective adhesive 4 between the upper substrate 2 and the lower substrate 1. Since the lower surface of the first copper layer 32 at the inflection zone 200 is covered with the layer of thermosetting green oil 36, and the layer of thermally cured green oil 36 extends over and covers a portion of the lower surface of the first copper layer 32 in the gold finger region 100, that is, the thermal-cured green oil layer 36 is directly brushed to the gold finger area 100, the protective paste 4 is coated between the thermal-cured green oil layer 36 located in the gold finger area 100 and the upper substrate 2 and the lower substrate 1, thereby leading the bending starting point to reach the tail end of the protective glue 4 in advance, greatly reducing the bending protruding position and the bending stress, thereby avoiding the defects of pull damage of binding position, tilting of FPC3 and the like caused by overlarge bending stress, greatly improving the reliability of the product, the production yield of the product is improved, the production assembly efficiency of the product is greatly improved, therefore, the production and manufacturing cost of the product is greatly reduced, and the competitiveness of the product is improved, so that the increasing quality requirements of production enterprises are met.

Example 2

Referring to fig. 2, as a further optimization scheme of embodiment 1, in this embodiment, at least one through hole 37 penetrating through the first cover film layer 33, the first copper layer 32, the substrate layer 31, the second copper layer 34 and the second cover film layer 35 is formed on the FPC3 located in the body region 300, and a heat conductive layer in contact with the first copper layer 32 and the second copper layer 34 is disposed on an inner wall of the through hole 37. Good heat dissipation is achieved by virtue of the good thermal conductivity at the perforations 37. The heat conducting layer can be a copper adhesive conductive ink layer.

As the utility model provides a reduce FPC stress of buckling's a display module assembly's a preferred embodiment, be provided with the heat conductor of being connected with outside heat conduction structure in the perforation 37, the heat conductor with the heat-conducting layer contacts. So that the heat in the FPC3 is diffused to the external heat conducting structure through the heat conductor in the through hole 37 to further improve the heat dissipation efficiency of the body. Preferably, the through holes 37 are provided at the edge of the body region 300 in order that the through holes 37 may be connected with an external heat conductive structure.

Example 3

Referring to fig. 3, as a further optimized solution of embodiment 1, in this embodiment, a polarizer 5 is disposed on an upper surface of the upper substrate 2, and a foam 6 is disposed on a lower surface of the lower substrate 1.

Referring to fig. 4, as a preferred embodiment of the display module assembly for reducing the bending stress of the FPC provided by the present invention, the upper surface of the foam 6 is provided with a weak adhesive glue layer 61, and the lower surface of the foam 6 is provided with a strong adhesive glue layer 62. Bubble cotton 6 not only can play buffering and dirt-proof effect, still because the upper surface coating of bubble cotton 6 has weak viscidity glue layer 61, it can prevent that the viscous force is too strong and lead to the infrabasal plate 1 to be dragged and cause MURA, and the lower surface coating has strong viscidity glue layer 62 can guarantee the viscous force and avoid droing.

Please refer to fig. 5, as a preferred embodiment of the display module assembly for reducing the bending stress of the FPC provided by the present invention, the lower surface of the foam 6 is further provided with a PET layer 63, and the strong adhesive glue layer 62 is disposed on the lower surface of the PET layer 63, so as to have the fool-proof function due to the PET layer 63.

As a preferred embodiment of the display module for reducing the bending stress of the FPC provided in the present invention, the initial adhesion ratio of the strong adhesion glue layer 62 to the weak adhesion glue layer 61 is 2:1 to 50:1, which prevents the pulling and the resulting MURA by controlling the initial adhesion.

As the utility model provides a reduce FPC bending stress's a display module assembly's a preferred embodiment, weak viscidity glue layer 61 with strong viscidity glue layer 62's viscidity is the same, weak viscidity glue layer 61's glue coating shape is latticed, strong viscidity glue layer 62's glue coating shape is the complete coating. Because the glue viscosity of the weak-viscosity glue layer 61 is the same as that of the strong-viscosity glue layer 62, the purchase quantity is increased, the cost can be greatly reduced, and meanwhile, the glue cannot be mixed in the gluing process, so that the production efficiency is improved; and the coating shape of the low-viscosity glue layer 61 is a grid shape, which is equivalent to reducing the glue area of the low-viscosity glue layer 61, so that the viscosity of the low-viscosity glue layer 61 is reduced.

As the utility model provides a reduce FPC bending stress's a display module assembly's an preferred embodiment, the surface of bubble cotton 6 is provided with the surface treatment layer that increases surface roughness, sets up the surface treatment layer that increases surface roughness in the region that sets up strong viscidity glue layer 62 and weak viscidity glue layer 61 promptly to increase the adhesive force of glue, improve the adhesion strength of glue.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims

1. The utility model provides a reduce FPC display module assembly of stress of buckling which characterized in that, it includes infrabasal plate, upper substrate and FPC by being gone up in proper order and setting gradually, FPC includes from the right side to left side golden finger district, bending zone and this district that connect gradually, FPC includes the substrate layer and locates the first copper layer of substrate layer below is located golden finger district FPC's first copper layer is binded in the upper surface of upper substrate is located this district the lower surface on first copper layer covers there is first cover film layer, is located this district the upper surface of substrate layer is provided with the second copper layer, the upper surface on second copper layer covers has second cover film layer, is located bending zone the lower surface on first copper layer covers there is the green oil reservoir of thermosetting, the green oil reservoir of thermosetting extends and covers the lower surface on the first copper layer that partly is located golden finger district, is located golden finger district the green oil reservoir of thermosetting with the coating has the protective gel between upper substrate and the infrabasal plate .

2. The display module assembly for reducing the bending stress of the FPC as recited in claim 1, wherein at least one through hole penetrating through the first cover film layer, the first copper layer, the substrate layer, the second copper layer and the second cover film layer is formed on the FPC in the body region, and a heat conduction layer contacting with the first copper layer and the second copper layer is disposed on an inner wall of the through hole.

3. The display module assembly for reducing the bending stress of the FPC as recited in claim 2, wherein a heat conductor connected to an external heat conducting structure is disposed in the through hole, and the heat conductor contacts the heat conducting layer.

4. The display module assembly for reducing the bending stress of the FPC as recited in claim 1, wherein a polarizer is disposed on an upper surface of the upper substrate, and foam is disposed on a lower surface of the lower substrate.

5. The display module for reducing the bending stress of the FPC as recited in claim 4, wherein a weak adhesive glue layer is disposed on an upper surface of the foam, and a strong adhesive glue layer is disposed on a lower surface of the foam.

6. The display module for reducing the bending stress of the FPC as recited in claim 5, wherein a PET layer is further disposed on a lower surface of the foam, and the highly adhesive glue is disposed on a lower surface of the PET layer.

7. The display module for reducing the bending stress of the FPC as recited in claim 5, wherein an initial adhesion ratio of the strong adhesive glue layer to the weak adhesive glue layer is 2:1 to 50: 1.

8. The display module for reducing the bending stress of the FPC as recited in claim 5, wherein the weak adhesion glue layer and the strong adhesion glue layer have the same adhesion, the glue coating shape of the weak adhesion glue layer is a grid shape, and the glue coating shape of the strong adhesion glue layer is a full coating.

9. A display module assembly capable of reducing bending stress of an FPC according to claim 5, wherein the outer surface of the foam is provided with a surface treatment layer for increasing surface roughness.

10. The display module for reducing the bending stress of the FPC as recited in claim 9, wherein the surface treatment layer is frosted or diamond-shaped knurls.