CN213924599U - Support membrane and flexible display panel - Google Patents
Support membrane and flexible display panel Download PDFInfo
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- CN213924599U CN213924599U CN202022834024.0U CN202022834024U CN213924599U CN 213924599 U CN213924599 U CN 213924599U CN 202022834024 U CN202022834024 U CN 202022834024U CN 213924599 U CN213924599 U CN 213924599U
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Abstract
The utility model relates to a support film and a flexible display panel, wherein the support film comprises a first release film, a glue layer, a base material layer and a second release film; the glue material layer includes first glue material layer, add glue material layer and the second glue material layer that sets up side by side in proper order. The utility model discloses a support membrane can improve production efficiency greatly, and reduce cost avoids tearing the yield loss that arouses because of the protection film, improves the production yield, can obtain the support membrane trompil of the OLB bending region of high accuracy simultaneously.
Description
Technical Field
The utility model relates to a display panel technical field especially relates to a support membrane and flexible display panel.
Background
Organic Light Emitting Diode (OLED) Display devices are becoming the first choice of screens, and have many advantages of self-luminescence, high Light Emitting efficiency, short response time, high definition and contrast, and the like, and meanwhile, the screens can be ensured to have certain flexibility and adaptability. With the development of flexible display screens, people have higher and higher expectations for foldable and curved display products.
At present, a flexible display screen film layer generally comprises a cover plate, a module functional film layer, a light-emitting film layer, a back plate film layer, a flexible substrate, a back support film and other film layer structures. Wherein the supporting film plays a role in protection and realization of corresponding mechanical properties under the display screen.
At present, in the preparation process of a Module (MDL), a protective film is generally pasted on the side of a flexible substrate after laser lift-off (LLO), the protective film is torn off after lighting (PT) test is finished, and then a support film is pasted on the protective film. If the large support film plate is directly attached, the problem of attachment precision exists, and the support film hole opening of the terminal (OLB) bending area cannot be guaranteed.
CN111489654A discloses a support film for a flexible display panel, the support film comprising: the display panel comprises a first supporting part and a second supporting part, wherein the first supporting part is arranged on a bonding area, the second supporting part extends to the bonding area from a display area, a groove is formed between the first supporting part and the second supporting part to expose the first surface, the first supporting part comprises a first supporting base material and a first glue material, and the first supporting base material is bonded on the first surface by the first glue material; the second support portion includes: the second supporting base material and a second glue material are used for bonding the second supporting base material on the first surface; the elastic modulus of the first support base material is different from that of the second support base material, the thickness of the first support base material is different from that of the second support base material, and the thickness of the first support part is equal to that of the second support part. Different performance requirements of the foldable display panel and the curved display panel can be realized respectively. However, the protective film needs to be removed and then attached, which complicates the process flow.
CN108598263A discloses a support film for a flexible display panel, a flexible display panel and a manufacturing method thereof, which solve the problem that a flexible screen body is difficult to bend due to a support film attached to a bending region of a flexible display panel in the prior art. The utility model provides a support membrane is formed with between support area and the tearing district and cuts the line including support area and the district that tears adjacent with it. However, if the supporting film is directly attached to the display panel, there is a problem of attachment accuracy, and it is not possible to ensure the opening of the supporting film in the OLB bending region.
Therefore, there is a need in the art to develop a flexible display panel supporting film that can simplify the process, reduce the cost, and improve the yield and the attaching precision.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned deficiencies of the prior art, it is an object of the present invention to provide a support film, and more particularly, to a support film for a flexible display panel. The supporting film can directly replace the protective film to carry out large-plate laminating, so that the production efficiency can be greatly improved, the cost is reduced, the yield loss caused by tearing off the protective film is avoided, the production yield is improved, and meanwhile, the supporting film opening of the OLB bending area with high precision can be obtained.
To achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a support film, which comprises a first release film, a rubber material layer, a base material layer and a second release film;
the glue material layer includes first glue material layer, add glue material layer and the second glue material layer that sets up side by side in proper order.
The utility model provides a support membrane can replace the protection film and carry out big board laminating, add the OLB district that the viscose material layer corresponds flexible display panel, can add the viscose material layer through laser cutting regional substrate layer and part of will buckling after accomplishing big board laminating and get rid of, remaining adds the viscose material layer and can play the effect of protection film, near OLB district region can add the viscose material layer that will not get rid of through UV illumination again and glue (for example UV adds glues or the thermosetting adds glues). Use the utility model discloses a support membrane can improve production efficiency greatly, and reduce cost avoids tearing the yield loss that arouses because of the protection film, improves the production yield, can obtain the support membrane trompil in OLB bending region of high accuracy simultaneously.
The utility model discloses in, UV adds the viscose or the thermosetting adds the viscose is conventional gluing agent, wherein the UV adds the gluing agent that the viscose indicates viscosity and curing degree risees under the illumination of UV light, and the thermosetting adds the gluing agent that the viscose indicates viscosity and curing degree risees under the heating condition, and these two kinds of gluing agents all can be obtained through the commercial purchase.
The utility model provides a support membrane, when using, tears first from the type membrane to glue material layer one side subsides and apply on flexible display panel's the substrate, and will add the OLB district that the adhesive material layer corresponds flexible display panel.
Preferably, the adhesive material layer is a UV adhesive layer or a thermosetting adhesive layer.
Preferably, the first release film comprises a first base film and a first adhesive layer arranged on one side of the first base film, and the second release film comprises a second base film and a second adhesive layer arranged on one side of the second base film.
Preferably, the viscosity of the first adhesive layer < the viscosity of the second adhesive layer.
Preferably, the materials of the first base film and the second base film each independently include any one or at least two combinations of polyethylene terephthalate (PET), cycloolefin Copolymer (COP), Polyimide (PI), or Polyethylene (PE).
Preferably, the first adhesive material layer, the adhesive material-added layer and the second adhesive material layer are connected in sequence in a seamless manner.
Preferably, the first adhesive material layer and the second adhesive material layer are each independently a pressure sensitive adhesive layer or an epoxy resin adhesive layer.
The utility model discloses in, UV adds the viscose and adds the viscose with heat admittedly and be prior art's product, and the technical staff in the field can obtain through the commercial purchase, also can select to prepare through conventional method.
Preferably, the part of the substrate layer, which is in contact with the adhesive-added material layer, is a patterned area.
The utility model discloses an among the preferred technical scheme, adopt the substrate layer of patterning, need not do any processing of epilogue after accomplishing big board laminating like this, need not get rid of the substrate layer through laser cutting promptly. Furthermore, this solution is equally applicable to the folding area of a folding screen.
Preferably, the pattern shape of the patterned region includes a wave shape, a concavo-convex shape, or a zigzag shape.
Preferably, the patterns on both sides of the substrate are symmetrically arranged in the patterned region.
Preferably, the width of the patterned area is the same as the width of the adhesive-applied layer. The width refers to a dimension along the arrangement direction of the first adhesive layer, the adhesive-applied layer, and the second adhesive layer.
Preferably, the material of the substrate layer comprises any one or at least two of polyethylene terephthalate (PET), cycloolefin Copolymer (COP), Polyimide (PI) or Polyethylene (PE).
Preferably, the thickness of the first release film is 30-100 μm, such as 42 μm, 44 μm, 46 μm, 48 μm, 50 μm, 52 μm, 54 μm, 56 μm, 58 μm, 60 μm, 62 μm, 64 μm, 66 μm, 68 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, etc., preferably 50 μm.
Preferably, the thickness of the glue layer is 5-100 μm, such as 6 μm, 10 μm, 15 μm, 20 μm, 22 μm, 24 μm, 26 μm, 28 μm, 30 μm, 32 μm, 34 μm, 36 μm, 38 μm, 40 μm, 42 μm, 44 μm, 46 μm, 48 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, etc., preferably 30 μm.
Preferably, the thickness of the substrate layer is 20-150 μm, such as 30 μm, 40 μm, 50 μm, 82 μm, 84 μm, 86 μm, 88 μm, 90 μm, 92 μm, 94 μm, 96 μm, 98 μm, 100 μm, 102 μm, 104 μm, 106 μm, 108 μm, 110 μm, 112 μm, 114 μm, 116 μm, 118 μm, 120 μm, 130 μm, 140 μm, etc., preferably 100 μm.
Preferably, the thickness of the second release film is 30-100 μm, such as 42 μm, 44 μm, 46 μm, 48 μm, 50 μm, 52 μm, 54 μm, 56 μm, 58 μm, 60 μm, 62 μm, 64 μm, 66 μm, 68 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, etc., preferably 50 μm.
Preferably, the thickness of the first release film is 30-100 μm, the thickness of the adhesive layer is 5-100 μm, the thickness of the base material layer is 20-150 μm, and the thickness of the second release film is 30-100 μm.
A second object of the present invention is to provide a flexible display panel, the flexible display panel includes a substrate, a support film formed on a first surface of the substrate and a functional module layer formed on a second surface of the substrate opposite to the first surface, the support film is one of the purposes the support film except for a first film layer except for a release film, and the adhesive layer is connected to the substrate.
Preferably, the adhesive material layer covers the terminal bending area of the flexible display panel, and the broadband of the adhesive material layer is greater than the width of the terminal bending area of the flexible display panel. The width refers to a dimension along the arrangement direction of the first adhesive layer, the adhesive-applied layer, and the second adhesive layer.
Preferably, the difference between the width of the adhesive layer and the width of the terminal bending region of the flexible display panel is greater than or equal to 50 μm, such as 51 μm, 52 μm, 53 μm, 54 μm, 55 μm, 56 μm, 57 μm, 58 μm, 59 μm, 60 μm, 61 μm, 62 μm, 63 μm, and the like.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a support membrane can replace the protection film and carry out the laminating of big board, adds the OLB district that the viscose material layer corresponds flexible display panel, can add the viscose material layer through laser cutting with the regional substrate layer that will buckle and part and get rid of after accomplishing big board laminating, and remaining adds the viscose material layer and can play the effect of protection film, and near the OLB district region can add the viscose material layer that will not get rid of through UV illumination again and glue. Use the utility model discloses a support membrane can improve production efficiency greatly, and reduce cost avoids tearing the yield loss that arouses because of the protection film, improves the production yield, can obtain the support membrane trompil in OLB bending region of high accuracy simultaneously.
Drawings
Fig. 1 is a schematic structural view of a support membrane provided in an embodiment of the present invention;
fig. 2 is a schematic view of a substrate layer of a support film provided in an embodiment of the present invention;
fig. 3 is a schematic view of a substrate layer of a support film provided in an embodiment of the present invention;
fig. 4 is a schematic view of a substrate layer of a support film provided in an embodiment of the present invention;
fig. 5 is a schematic structural view of a support membrane provided in comparative example 1 of the present invention;
the adhesive film comprises 1-a first release film, 2-an adhesive layer, 3-a substrate layer, 4-a second release film, 201-a first adhesive layer, 202-an adhesive layer, 203-a second adhesive layer, 301-a first substrate and 302-a second substrate.
Detailed Description
To facilitate understanding of the present invention, the present invention has the following embodiments. It should be understood by those skilled in the art that the described embodiments are merely provided to assist in understanding the present invention and should not be construed as specifically limiting the present invention.
Example 1
The present embodiment provides a support film, the structure of which is shown in fig. 1, the support film includes a first release film 1, a rubber layer 2, a substrate layer 3, and a second release film 4;
the adhesive material layer comprises a first adhesive material layer 201, an adhesive material adding layer 202 and a second adhesive material layer 203 which are sequentially arranged side by side, wherein the adhesive material adding layer 202 is a UV adhesive material adding layer; the first adhesive layer 201 and the second adhesive layer 203 are both pressure-sensitive adhesive layers;
the thickness of the first release film is 50 mu m, the thickness of the adhesive layer is 30 mu m, the thickness of the base material layer is 100 mu m, and the thickness of the second release film is 50 mu m.
The embodiment further provides a flexible display panel, which includes a substrate, a support film formed on a first surface of the substrate, and a functional module layer formed on a second surface of the substrate opposite to the first surface, wherein the support film is a film layer of the support film except for a first release film, and the adhesive layer 2 is connected to the substrate;
the adhesive material layer covers the terminal bending area of the flexible display panel, the broadband of the adhesive material layer is larger than the width of the terminal bending area of the flexible display panel, and the difference between the width of the adhesive material layer and the width of the terminal bending area of the flexible display panel is 50 micrometers.
Example 2
The present embodiment provides a support film, the structure of which is shown in fig. 1, the support film includes a first release film 1, a rubber layer 2, a substrate layer 3, and a second release film 4;
the adhesive material layer comprises a first adhesive material layer 201, an adhesive material adding layer 202 and a second adhesive material layer 203 which are sequentially arranged side by side, wherein the adhesive material adding layer 202 is thermosetting adhesive; the first adhesive layer 201 and the second adhesive layer 203 are both pressure-sensitive adhesive layers;
the thickness of the first release film is 50 mu m, the thickness of the adhesive layer is 30 mu m, the thickness of the base material layer is 100 mu m, and the thickness of the second release film is 50 mu m.
The embodiment further provides a flexible display panel, which includes a substrate, a support film formed on a first surface of the substrate, and a functional module layer formed on a second surface of the substrate opposite to the first surface, wherein the support film is a film layer of the support film except for a first release film, and the adhesive layer 2 is connected to the substrate;
the adhesive material layer covers the terminal bending area of the flexible display panel, the broadband of the adhesive material layer is larger than the width of the terminal bending area of the flexible display panel, and the difference between the width of the adhesive material layer and the width of the terminal bending area of the flexible display panel is 50 micrometers.
Example 3
The difference from embodiment 1 is that the part of the substrate layer in contact with the adhesive-coated layer is a patterned region, the pattern shape of the patterned region includes a wave shape, the specific structure of the substrate layer is as shown in fig. 2, and the width of the patterned region is the same as the width of the adhesive-coated layer.
Example 4
The difference from embodiment 1 is that the part of the substrate layer in contact with the adhesive-coated layer is a patterned region, the pattern shape of the patterned region includes a concave-convex shape, the specific substrate layer structure is as shown in fig. 3, and the width of the patterned region is the same as the width of the adhesive-coated layer.
Example 5
The difference from embodiment 1 is that the part of the substrate layer in contact with the adhesive-coated layer is a patterned region, the pattern shape of the patterned region includes a zigzag shape, the specific substrate layer structure is as shown in fig. 4, and the width of the patterned region is the same as the width of the adhesive-coated layer.
Example 6
The present embodiment provides a support film, the structure of which is shown in fig. 1, the support film includes a first release film 1, a rubber layer 2, a substrate layer 3, and a second release film 4;
the adhesive material layer comprises a first adhesive material layer 201, an adhesive material adding layer 202 and a second adhesive material layer 203 which are sequentially arranged side by side, wherein the adhesive material adding layer 202 is UV adhesive; the first adhesive layer 201 and the second adhesive layer 203 are both epoxy resin adhesive layers;
the thickness of the first release film is 30 mu m, the thickness of the adhesive layer is 5 mu m, the thickness of the base material layer is 20 mu m, and the thickness of the second release film is 30 mu m.
The embodiment further provides a flexible display panel, which includes a substrate, a support film formed on a first surface of the substrate, and a functional module layer formed on a second surface of the substrate opposite to the first surface, wherein the support film is a film layer of the support film except for a first release film, and the adhesive layer 2 is connected to the substrate;
the adhesive material layer covers the terminal bending area of the flexible display panel, the broadband of the adhesive material layer is larger than the width of the terminal bending area of the flexible display panel, and the difference between the width of the adhesive material layer and the width of the terminal bending area of the flexible display panel is 55 micrometers.
Example 7
The present embodiment provides a support film, the structure of which is shown in fig. 1, the support film includes a first release film 1, a rubber layer 2, a substrate layer 3, and a second release film 4;
the adhesive material layer comprises a first adhesive material layer 201, an adhesive material adding layer 202 and a second adhesive material layer 203 which are sequentially arranged side by side, wherein the adhesive material adding layer 202 is UV adhesive; the first adhesive material layer 201 and the second adhesive material layer are both pressure-sensitive adhesive layers;
the thickness of the first release film is 100 mu m, the thickness of the adhesive layer is 100 mu m, the thickness of the base material layer is 150 mu m, and the thickness of the second release film is 100 mu m.
The embodiment further provides a flexible display panel, which includes a substrate, a support film formed on a first surface of the substrate, and a functional module layer formed on a second surface of the substrate opposite to the first surface, wherein the support film is a film layer of the support film except for a first release film, and the adhesive layer 2 is connected to the substrate;
the adhesive material layer covers the terminal bending area of the flexible display panel, the broadband of the adhesive material layer is larger than the width of the terminal bending area of the flexible display panel, and the difference between the width of the adhesive material layer and the width of the terminal bending area of the flexible display panel is 60 micrometers.
Comparative example 1
The present comparative example provides a support film, which is different from the support film of example 11 in that the adhesive layer 2 does not include the adhesive-applied layer 202, the base layer includes the first substrate 301 and the second substrate 302, and there are gaps between the first substrate 301 and the second substrate 302, the width of the gaps is the same as the width of the adhesive-applied layer 202 of example 1, as shown in fig. 5.
Performance testing
(1) The following operations are respectively performed for the flexible display panel of the above embodiment:
and directly carrying out laser cutting to remove the substrate layer and part of the viscose layer in the area needing to be bent, and carrying out UV (ultraviolet) gluing or thermosetting gluing on the un-removed viscose layer in the area near the OLB (on-line bonding) area through UV illumination.
(2) The following operations were performed for the support film of comparative example 1:
a protective film was attached to the first surface of the same flexible display panel substrate as in example 1, and then the protective film was removed, and the first release film of the support film of comparative example 1 was removed, and one side of the adhesive material layer was directly attached to the first surface.
(3) The following operations were performed for the support film of comparative example 1:
after the first release film of the support film of comparative example 1 was peeled off, one side of the adhesive material layer was directly attached to the first surface of the same flexible display panel substrate as in example 1.
The accuracy of the support film opening in the OLB bending region in the above process was measured, and the results are shown in table 1.
TABLE 1
According to the above results, the utility model provides a support membrane can obtain the support membrane trompil in OLB bending region of high accuracy.
The applicant states that the present invention is described in detail through the above embodiments, but the present invention is not limited to the above detailed embodiments, that is, the present invention must not be implemented depending on the above detailed embodiments. It should be clear to the skilled person in the technical field that to the utility model discloses an improvement, to the utility model discloses the equivalent replacement of each structure of product and the interpolation of auxiliary structure, the selection of specific mode etc. all fall within the scope of protection and the disclosure scope.
Claims (11)
1. The support film is characterized by comprising a first release film, a glue material layer, a base material layer and a second release film;
the glue material layer includes first glue material layer, add glue material layer and the second glue material layer that sets up side by side in proper order.
2. The support film of claim 1, wherein the adhesive layer is a UV adhesive layer or a thermoset adhesive layer.
3. The support membrane of claim 1, wherein the first adhesive layer, the adhesive-applied layer, and the second adhesive layer are seamlessly connected in sequence.
4. The support film of claim 1, wherein the first and second adhesive layers are each independently a pressure sensitive adhesive layer or an epoxy adhesive layer.
5. The support film of claim 1, wherein the portion of the substrate layer in contact with the adhesive-applied layer is a patterned region.
6. The support film of claim 5, wherein the patterned shape of the patterned region comprises a wave shape, a concavo-convex shape, or a saw-tooth shape.
7. The support film of claim 5, wherein the patterned region has a width that is the same as a width of the adhesive-applied layer.
8. The support film of claim 1, wherein the first release film has a thickness of 30-100 μm, the adhesive layer has a thickness of 5-100 μm, the substrate layer has a thickness of 20-150 μm, and the second release film has a thickness of 30-100 μm.
9. A flexible display panel, comprising a substrate, a support film formed on a first surface of the substrate, and a functional module layer formed on a second surface of the substrate opposite to the first surface, wherein the support film is the film layer of the support film of any one of claims 1 to 8 except for the first release film, and the adhesive layer is connected to the substrate.
10. The flexible display panel of claim 9, wherein the adhesive layer covers the terminal bending region of the flexible display panel, and wherein a width of the adhesive layer is greater than a width of the terminal bending region of the flexible display panel.
11. The flexible display panel of claim 10, wherein the difference between the width of the adhesive layer and the width of the terminal bending region of the flexible display panel is greater than or equal to 50 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022834024.0U CN213924599U (en) | 2020-11-30 | 2020-11-30 | Support membrane and flexible display panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022834024.0U CN213924599U (en) | 2020-11-30 | 2020-11-30 | Support membrane and flexible display panel |
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| CN213924599U true CN213924599U (en) | 2021-08-10 |
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