CN114316830B - Composite adhesive tape and display module - Google Patents
Composite adhesive tape and display module Download PDFInfo
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- CN114316830B CN114316830B CN202210134407.8A CN202210134407A CN114316830B CN 114316830 B CN114316830 B CN 114316830B CN 202210134407 A CN202210134407 A CN 202210134407A CN 114316830 B CN114316830 B CN 114316830B
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- adhesive tape
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- composite adhesive
- tape
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- 239000002131 composite material Substances 0.000 title claims abstract description 149
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 115
- 238000005452 bending Methods 0.000 claims abstract description 71
- 239000010410 layer Substances 0.000 claims abstract description 60
- 239000011241 protective layer Substances 0.000 claims abstract description 43
- 239000000696 magnetic material Substances 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 12
- 230000002829 reductive effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000741 silica gel Substances 0.000 description 5
- 229910002027 silica gel Inorganic materials 0.000 description 5
- 230000000670 limiting effect Effects 0.000 description 3
- 230000036961 partial effect Effects 0.000 description 3
- 229920001296 polysiloxane Polymers 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Landscapes
- Adhesive Tapes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The embodiment of the invention provides a composite adhesive tape and a display module. The compound adhesive tape is used for being attached to the surface of an object, the surface of the object comprises at least one bending part, and the surface of the bending part is a cambered surface; the composite adhesive tape comprises a stacked buffer layer and a protective layer; when the composite adhesive tape is attached to the surface of an object, the protective layer is positioned on one side of the buffer layer, which is far away from the surface of the object; the composite adhesive tape comprises a first area, wherein the first area is used for being attached to the surface of the bending part; the protective layer includes at least one opening, and the opening is located in the first region. The invention can reduce rebound stress when the first area is bent, and improve the fitting degree of the composite adhesive tape and the surface of an object.
Description
Technical Field
The invention relates to the technical field of display, in particular to a composite adhesive tape and a display module.
Background
In the conventional display technology, a composite tape is required to be attached to the back surface of the display panel to protect the back surface of the display panel. With the development of technology, curved display screens such as hyperbolic screens, quadric screens, and the like have appeared. In the display panel with the bending part, when the back surface of the display panel is attached with the composite adhesive tape, the composite adhesive tape is easy to rebound at the bending position to be attached with the virtual adhesive tape, so that the composite adhesive tape is separated from the display panel.
Disclosure of Invention
The embodiment of the invention provides a composite adhesive tape and a display module, which are used for solving the problem that the composite adhesive tape and a display panel at a bending position are mutually separated in the prior art.
In a first aspect, an embodiment of the present invention provides a composite adhesive tape, where the composite adhesive tape is used for attaching to a surface of an object, the surface of the object includes at least one curved portion, and the surface of the curved portion is a cambered surface; the composite adhesive tape comprises a stacked buffer layer and a protective layer; when the composite adhesive tape is attached to the surface of an object, the protective layer is positioned on one side of the buffer layer, which is far away from the surface of the object;
the composite adhesive tape comprises a first area, wherein the first area is used for being attached to the surface of the bending part;
the protective layer includes at least one opening, and the opening is located in the first region.
In a second aspect, an embodiment of the present invention further provides a display module, including the composite adhesive tape provided in any embodiment of the present invention; the display module further comprises a display panel, and the composite adhesive tape is attached to the surface of the display panel.
The composite adhesive tape and the display module provided by the embodiment of the invention have the following beneficial effects: set up the trompil in the protective layer of compound sticky tape, the trompil is located first region, and when compound sticky tape and display panel carried out the laminating, first region and display panel's bight are laminated mutually, and first region needs crooked in order to adapt to the shape on bight surface. The rebound stress when the first area is bent can be reduced by the open holes, so that the first area rebound virtual adhesion of the composite adhesive tape is avoided, and the adhesion degree of the composite adhesive tape and the display panel can be improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic view of a composite tape according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken at the location of line A-A' in FIG. 1;
fig. 3 is a schematic diagram of a display module according to an embodiment of the invention;
FIG. 4 is a simplified schematic diagram of a process for attaching a composite adhesive tape to a display panel according to an embodiment of the present invention;
FIG. 5 is a schematic view of a portion of another composite tape according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating a bonding process between the composite adhesive tape and the display panel according to the embodiment of FIG. 5;
FIG. 7 is a schematic view of a portion of another composite tape according to an embodiment of the present invention;
FIG. 8 is a schematic diagram illustrating a bonding process between the composite adhesive tape and the display panel according to the embodiment of FIG. 7;
FIG. 9 is a schematic diagram of a portion of another display module according to an embodiment of the invention;
FIG. 10 is a schematic view of another composite tape according to an embodiment of the present invention;
FIG. 11 is a schematic illustration of another composite tape according to an embodiment of the present invention;
FIG. 12 is another schematic cross-sectional view taken at the location of line A-A' in FIG. 1;
FIG. 13 is another schematic cross-sectional view taken at the location of line A-A' in FIG. 1;
FIG. 14 is a schematic view of another composite tape according to an embodiment of the present invention;
FIG. 15 is a schematic view of a portion of another display module according to an embodiment of the invention;
FIG. 16 is a schematic view of another composite tape according to an embodiment of the present invention;
FIG. 17 is a schematic view of another composite tape according to an embodiment of the present invention;
fig. 18 is a schematic view of another composite adhesive tape according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the prior art, in the process of bonding the composite adhesive tape and the display panel, the profile modeling is required to be performed on one side of the composite adhesive tape by using a pressure maintaining silica gel head, that is to say, the composite adhesive tape is bonded with the display panel by using the silica gel head for extrusion. At the position of the bending part of the display panel, the composite adhesive tape needs to be bent to adapt to the shape of the surface of the bending part, so that the composite adhesive tape attached to the bending part in the attaching process has larger resilience after being bent, namely the force for recovering bending deformation during bending. When the pressure retention force of the silica gel head is insufficient, the composite adhesive tape is easy to rebound and virtually adhere, so that the bending part of the display panel is separated from the composite adhesive tape, and the adhesion degree is affected.
The embodiment of the invention provides a composite adhesive tape, which is used for being attached to the surface of an object, wherein the surface of the object comprises at least one bending part. Taking the attachment of the composite adhesive tape and the display panel with the bending part as an example, the surface of the display panel at the bending part is an arc surface, and then part of the composite adhesive tape needs to be bent in accordance with the shape of the surface of the bending part so as to achieve the attachment of the bending part of the display panel. According to the invention, the structure of the composite adhesive tape is designed to ensure that the composite adhesive tape can be well attached to the curved surface at the position of the curved part of the display panel when the composite adhesive tape is attached to the display panel, so that the phenomenon that the composite adhesive tape is bounced after being bent to cause virtual attachment is avoided, and the attaching degree of the composite adhesive tape and the display panel is improved.
Fig. 1 is a schematic view of a composite adhesive tape according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of fig. 1 at a position of a tangent line A-A'.
As seen in connection with fig. 1 and 2, the composite tape 01 includes a stacked buffer layer 10 and protective layer 20; the protective layer 20 includes at least one opening 30, wherein the opening 30 is located in a first region Q1 of the composite tape 01. The composite tape 01 illustrated in fig. 1 includes two first regions Q1, and the first regions Q1 include a plurality of openings 30 therein. The compound adhesive tape 01 provided in the embodiment of fig. 1 can be assembled into a hyperboloid display screen with curved surfaces on both sides after being attached to a display panel. In practice, the composite adhesive tape 01 may be designed according to specific requirements, and the composite adhesive tape 01 is set to include one first area Q1, three first areas Q1, or four first areas Q1.
The embodiment of the invention also provides a display module, which comprises the composite adhesive tape 01 provided by any embodiment of the invention. Fig. 3 is a schematic diagram of a display module according to an embodiment of the present invention, where, as shown in fig. 3, the display module includes a composite adhesive tape 01 and a display panel 02. The composite tape 01 is attached to the surface of the display panel 02. The display panel 02 includes a curved portion 021, and a surface M1 of the curved portion 021 is a cambered surface. The protective layer 20 is located on a side of the buffer layer 10 remote from the display panel 02. The first area Q1 of the composite adhesive tape 01 is attached to the curved portion 021, that is, the first area Q1 is attached to the surface M1.
Fig. 4 is a simplified schematic diagram of a bonding process of a composite adhesive tape and a display panel according to an embodiment of the present invention, as shown in fig. 4, when the composite adhesive tape 01 and the display panel 02 are bonded, the composite adhesive tape 01 is extruded by a silicone head 40 at one side of a protective layer 20, and a certain pressure is applied to the composite adhesive tape 01 by the silicone head 40 and maintained for a certain time, so as to complete the profiling bonding between the composite adhesive tape 01 and the display panel 02.
In the composite adhesive tape 01 provided by the embodiment of the invention, the first area Q1 of the protective layer 20 is provided with the opening 30, and when the composite adhesive tape 01 is attached to the display panel 02, the first area Q1 is attached to the curved portion 021 of the display panel 02, and the first area Q1 needs to be curved to adapt to the shape of the surface M1 of the curved portion 021. The hole 30 can reduce the rebound stress when the first region Q1 is bent, so as to avoid the rebound of the first region Q1 of the composite adhesive tape 01 to be virtually stuck, and improve the adhesion degree of the composite adhesive tape 01 and the display panel 02.
As shown in fig. 2, the depth d1 of the opening 30 in the thickness direction e of the protective layer 20 is equal to the thickness d2 of the protective layer 20. I.e. the openings 30 extend through the protective layer 20.
In other embodiments, the depth d1 of the opening 30 is less than the thickness d2 of the protective layer 20. That is, the opening 30 does not penetrate through the protective layer 20, and the opening 30 is a groove formed on a surface of the protective layer 20, which is far from the buffer layer 10. In the embodiment of the invention, the depth d1 of the opening 30 can be set according to specific requirements, so that the rebound stress of the first area Q1 during bending is reduced by using the opening 30, thereby avoiding the first area Q1 of the composite adhesive tape 01 from rebounding and being virtually pasted, and improving the laminating degree of the composite adhesive tape 01 and the display panel 02.
In some embodiments, fig. 5 is a schematic partial view of another composite adhesive tape provided in the embodiment of the present invention, and fig. 6 is a schematic process of bonding the composite adhesive tape provided in the embodiment of fig. 5 to a display panel. As shown in fig. 5, the openings 30 are filled with a magnetic material 50. As shown in fig. 6, when the composite tape 01 and the display panel 02 are attached, the composite tape 01 is pressed by the silicone head 40 on the side of the protective layer 20, and the display panel 02 is fixed and restrained by the jig 41 on the side of the display panel 02 away from the composite tape 01. The jig 41 is provided with a magnetic body 42, and the magnetic body 42 corresponds to the bent portion 021 of the display panel 02, that is, the magnetic body 42 corresponds to the first region Q1 of the composite tape 01. In the profiling bonding process, an attractive force can be formed between the magnetic body 42 and the magnetic material 50 filled in the opening 30, so that the holding force can be increased, the composite adhesive tape is further prevented from bouncing back to be attached in a virtual manner, and the bonding degree of the composite adhesive tape and the display panel is further improved.
In some embodiments, fig. 7 is a schematic partial view of another composite adhesive tape provided in the embodiment of the present invention, and fig. 8 is a schematic process of bonding the composite adhesive tape provided in the embodiment of fig. 7 to a display panel. As shown in fig. 7, the openings 30 are filled with a magnetic material 50. The area outside the openings 30 in the first area Q1 is a non-hole area F; in the non-hole region F, at least part of the surface of the protective layer 20 on the side away from the buffer layer 10 is covered with a magnetic material 50. In other words, the magnetic material 50 fills the opening 30 and spreads out of the opening 30 to cover at least a portion of the surface of the protective layer 20.
As shown in fig. 8, when the composite adhesive tape 01 and the display panel 02 are attached, the first area Q1 of the composite adhesive tape 01 is bent, and the openings 30 in the protective layer 20 can reduce the rebound stress when the first area Q1 is bent, so that the risk of rebound and virtual attachment of the first area Q1 of the composite adhesive tape 01 is reduced; meanwhile, the magnetic material 50 can form an attractive acting force with the magnetic body 42 in the jig 41, so that the holding force is increased, and the composite adhesive tape is further prevented from bouncing and adhering to the object; in addition, the magnetic material 50 covering the surface of the protection layer 20 can increase the bending radius of the first region Q1, thereby further increasing the holding force.
In some embodiments, fig. 9 is a schematic partial view of another display module according to an embodiment of the invention. As shown in fig. 9, the display panel 02 includes a flat plate portion 022, a surface of the flat plate portion 022 is substantially flat, and the flat plate portion 022 is connected to a curved portion 021. The bending direction f of the bending portion 021 is illustrated in fig. 9 in which the bending portion 021 is bent in a direction perpendicular to the plane in which the flat plate portion 022 is located on a side of the bending portion 021 away from the flat plate portion 022. Along the bending direction f of the bending part 021, the bending part 021 comprises a first zone Z1, a second zone Z2 and a third zone Z3 which are sequentially connected; the position of the minimum radius of curvature in the curved portion 021 is located in the second zone Z2. When the composite tape 01 is attached to the surface of the display panel 02, the opening 30 corresponds to the second region Z2. In this embodiment, the curvature radius of each position of the curved portion 021 of the display panel 02 is not completely the same, and when the composite adhesive tape 01 is attached to the position with the smallest curvature radius in the curved portion 021, the curvature radius of the bending of the portion of the composite adhesive tape 01 is smaller, in other words, the bending degree of the portion of the composite adhesive tape 01 is larger, and the portion of the composite adhesive tape 01 is more likely to cause bouncing and virtual attachment. The composite adhesive tape 01 provided by the embodiment of the invention adapts to the bending shape of the bending part 021 of the display panel 02, and the position of the opening 30 in the first area Q1 is set, so that the rebound stress at the position with the minimum bending radius of the composite adhesive tape 01 can be effectively reduced, the composite adhesive tape 01 is prevented from bouncing and being virtually stuck, and the fitting degree of the composite adhesive tape 01 and the display panel 02 is improved.
In some embodiments, as shown in fig. 1, in the first region Q1, the plurality of openings 30 are arranged in a column in the first direction x. When the composite adhesive tape 01 is attached to the surface of an object, the first direction x is parallel to the axial direction of the bending portion, wherein the bending portion is bent around the axial direction. For the cylinder, the direction of the connecting line of the centers of the imaginary circles in the cylinder is axial. The axial direction of the curved portion in the embodiment of the present invention can be understood with reference to the axial direction of the cylinder. The bending direction f of the bent portion 021 is schematically shown in fig. 3, and the axial direction of the bent portion 021 is perpendicular to the paper surface. According to the embodiment of the invention, the arrangement direction of the openings in the composite adhesive tape 01 is designed according to the bending shape of the object to be attached, so that when the first area Q1 is attached to the bending part 021 of the display panel 02, the openings 30 can reduce the rebound stress when the first area Q1 is bent, thereby avoiding the rebound and virtual attachment of the first area Q1 of the composite adhesive tape 01 and improving the attaching degree of the composite adhesive tape 01 and the display panel 02.
In some embodiments, fig. 10 is a schematic diagram of another composite adhesive tape according to an embodiment of the present invention, as shown in fig. 10, in the first area Q1, a plurality of openings 30 are randomly arranged. The rebound stress of bending at different positions in the first area Q1 can be reduced, and the first area Q1 of the composite adhesive tape 01 is prevented from rebounding and adhering virtually.
The openings 30 illustrated in fig. 1 and 10 are substantially circular in shape. In some embodiments, the shape of the aperture 30 may also be rectangular, oval, triangular, irregular, etc.
In one embodiment, fig. 11 is a schematic view of another composite adhesive tape according to an embodiment of the present invention, as shown in fig. 11, the opening 30 in the first area Q1 is rectangular.
In addition, the size of the opening 30 is not limited in the embodiment of the present invention.
In some embodiments, FIG. 12 is another cross-sectional view taken at the location of line A-A' in FIG. 1. As shown in fig. 12, the composite tape 01 further includes an electrostatic shielding layer 60, the electrostatic shielding layer 60 being located between the buffer layer 10 and the protective layer 20. The composite adhesive tape 01 and the display panel 02 are adhered to form a display module, and the electrostatic shielding layer 60 is used for shielding static electricity so as to avoid adverse effects of the static electricity on the display of the display panel 02.
As shown in fig. 12, the electrostatic shielding layer 60 includes a stacked support layer 61 and a conductive layer 62, the conductive layer 62 being located on a side of the support layer 61 away from the buffer layer 10.
In some embodiments, support layer 61 comprises polyimide.
In some embodiments, the conductive layer 62 includes copper foil or graphene material.
In some embodiments, the cushioning layer 10 comprises foam.
In some embodiments, FIG. 13 is another cross-sectional view taken at the location of line A-A' in FIG. 1. Fig. 14 is a schematic view of another composite adhesive tape according to an embodiment of the present invention.
As shown in fig. 13, the electrostatic shielding layer 60 includes at least one cutting line 63 located in the first region Q1. The cutting line 63 cuts the electrostatic shielding layer 60. That is, the electrostatic shielding layers 60 on both sides of the cutting line 63 are not continuous, but may be physically in contact. In fig. 13, the cut line 63 overlaps the opening 30 in the thickness direction e of the protective layer 20.
The positional relationship between the cutting line 63 and the opening 30 is not limited in the embodiment of the present invention. In some embodiments, the cut line 63 does not overlap the aperture 30 in the thickness direction e of the protective layer 20.
In the embodiment of the invention, the included angle between the extending direction of the cutting line 63 and the first direction x is θ, and θ is less than or equal to 10 °. Fig. 14 is a schematic view of the electrostatic shielding layer 60 looking at the buffer layer 10, and fig. 14 shows that the extending direction of the cutting line 63 is substantially the same as the first direction x, that is, θ=0°. When the composite adhesive tape 01 is attached to the surface of an object, the first direction x is flat with the axial direction of the bending portion.
In the embodiment of the invention, the cutting line 63 located in the first area Q1 is disposed in the electrostatic shielding layer 60, the electrostatic shielding layer 60 is cut off at the position of the cutting line 63, and the arrangement of the cutting line 63 can reduce the rebound stress when the electrostatic shielding layer 60 is bent, that is, can reduce the rebound stress when the first area Q1 is bent, thereby further reducing the risk of the rebound of the first area Q1 of the composite adhesive tape 01. The cut line 63 is provided by cutting only a part of the electrostatic shielding layer 60, and does not affect the electrostatic shielding performance of the entire electrostatic shielding layer 60.
In some embodiments, fig. 15 is a schematic view of a portion of another display module provided in an embodiment of the present invention, as shown in fig. 15, along a bending direction f of a bending portion 021, the bending portion 021 includes a first zone Z1, a second zone Z2 and a third zone Z3 connected in sequence; the position of the minimum radius of curvature in the curved portion 021 is located in the second zone Z2. When the composite tape 01 is attached to the surface of the display panel 02, the cut line 63 corresponds to the second region Z2. In this embodiment, the radii of curvature of the curved portions 021 of the display panel 02 are not exactly the same, and when the composite tape 01 is attached to the position of the curved portion 021 having the smallest radius of curvature, the radius of curvature of the bending portion of the composite tape 01 is also small. That is, if the bending degree of the part of the composite adhesive tape 01 is larger, the part of the composite adhesive tape 01 is more likely to cause rebound and virtual adhesion. The composite adhesive tape 01 provided by the embodiment of the invention adapts to the bending shape of the bending part 021 of the display panel 02 to set the position of the opening 30 in the first area Q1, so that the rebound stress at the position with the minimum bending radius of the composite adhesive tape 01 can be effectively reduced, and meanwhile, the cutting line 63 in the electrostatic shielding layer 60 is arranged corresponding to the second area Z2, so that the rebound stress at the position with the minimum bending radius of the composite adhesive tape 01 can be further reduced, the rebound virtual adhesion of the composite adhesive tape 01 is effectively avoided, and the bonding degree of the composite adhesive tape 01 and the display panel 02 is improved.
As shown in fig. 14, in the first region Q1, a plurality of cutting lines 63 are arranged in a row in the first direction x. When the composite adhesive tape 01 is attached to the surface of an object, the first direction x is parallel to the axial direction of the bending portion, wherein the bending portion is bent around the axial direction. According to the embodiment of the invention, the arrangement direction of the cutting lines 63 in the electrostatic shielding layer 60 is designed according to the bending shape of the object to be attached, so that when the first area Q1 is attached to the bending part 021 of the display panel 02, the arrangement of the cutting lines 63 can reduce the rebound stress when the first area Q1 is bent, thereby further avoiding the first area Q1 of the composite adhesive tape 01 from rebounding and being virtually attached, and improving the attaching degree of the composite adhesive tape 01 and the display panel 02.
In some embodiments, fig. 16 is a schematic view of another composite adhesive tape provided in the embodiment of the present invention, and fig. 16 is a schematic view of the electrostatic shielding layer 60 looking at the buffer layer 10, as shown in fig. 16, in the first area Q1, a plurality of cutting lines 63 are randomly arranged, so that rebound stress in bending at different positions in the first area Q1 can be reduced, and rebound of the virtual adhesive tape 01 in the first area Q1 is avoided.
In the embodiment of the present invention, the first region Q1 of the composite tape 01 further includes a non-hole region F surrounding the opening 30. In some embodiments, fig. 17 is a schematic view of another composite adhesive tape according to an embodiment of the present invention, as shown in fig. 17, at least a portion of the surface of the protective layer 20 on the side far away from the buffer layer 10 is in an uneven shape in the non-hole region F. Grooves and/or protrusions are present on the surface of the protective layer 20 to present an uneven shape. The embodiment of the invention is not limited to the specific shape of the groove or the protrusion. The surface of the protective layer 20 on the side away from the buffer layer 10 is provided with uneven surface, and the roughness of the surface of the protective layer 20 can be increased. When the composite adhesive tape 01 is adhered to the display panel 02, the surface with larger roughness can increase the resistance in the profiling process of the pressure maintaining silica gel head, so that the pressure maintaining force of the bending part is increased, and the risk of rebound and virtual adhesion of the first area Q1 is further reduced.
In some embodiments, at least a portion of the surface of the protective layer 20 on the side remote from the buffer layer 10 is spark etched to form an uneven surface.
In some embodiments, the surface of the protective layer 20 on the side away from the buffer layer 10 is concave-convex, that is, the surface of the protective layer 20 on the side away from the buffer layer 10 has a larger roughness.
In some embodiments, fig. 18 is a schematic diagram of another composite adhesive tape according to an embodiment of the present invention, as shown in fig. 18, at least a portion of a surface of the protective layer 20 on a side away from the buffer layer 10 is in an uneven shape in the non-hole region F, and at least a portion of a surface of the protective layer 20 on a side away from the buffer layer 10 is covered with a magnetic material 50. When a layer of magnetic material 50 is plated on the concave-convex surface, the thickness of the magnetic material 50 formed on the surface of the protective layer 20 can be controlled by setting the process conditions, and when the thickness of the magnetic material 50 is small, the magnetic material 50 on the surface of the protective layer 20 can also have concave-convex shape, thereby increasing the roughness. When the composite adhesive tape 01 is adhered to the display panel 02, the surface with larger roughness can increase the resistance in the profiling process of the pressure maintaining silica gel head, so that the pressure maintaining force of the bending part is increased, and the risk of rebound and virtual adhesion of the first area Q1 is further reduced. The magnetic material 50 can form an attractive acting force with the magnetic body 42 in the jig 41, so that the holding force is increased, and the compound adhesive tape is further prevented from bouncing and adhering in a virtual manner; in addition, the magnetic material 50 covering the surface of the protection layer 20 can increase the bending radius of the first region Q1, thereby further increasing the holding force.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (13)
1. The composite adhesive tape is characterized in that the composite adhesive tape is used for being attached to the surface of an object, the surface of the object comprises at least one bending part, and the surface of the bending part is an arc surface; the composite adhesive tape comprises a stacked buffer layer and a protective layer; when the composite adhesive tape is attached to the surface of the object, the protective layer is positioned on one side of the buffer layer, which is far away from the surface of the object;
the composite adhesive tape comprises a first area, wherein the first area is used for being attached to the surface of the bending part; the protective layer comprises at least one opening, and the opening is positioned in the first area;
the first region further includes a non-porous region surrounding the aperture;
at least part of the surface of the protective layer, which is far away from the buffer layer, is in an uneven shape in the non-hole area.
2. The composite tape of claim 1, wherein,
in the thickness direction of the protective layer, the depth of the opening is d1;
the thickness of the protective layer is d2, and d1 is less than or equal to d2.
3. The composite tape of claim 1, wherein,
the openings are filled with magnetic materials.
4. The composite tape of claim 1, wherein,
the bending part comprises a first area, a second area and a third area which are sequentially connected along the bending direction of the bending part; the position with the smallest curvature radius in the bending part is positioned in the second area;
the openings correspond to the second regions when the composite tape is attached to the surface of the object.
5. The composite tape of claim 1, wherein,
in the first region, a plurality of the openings are arranged in a row in a first direction;
when the composite adhesive tape is attached to the surface of the object, the first direction is parallel to the axial direction of the bending portion, wherein the bending portion bends around the axial direction.
6. The composite tape of claim 1, wherein,
and in the first area, a plurality of the open holes are irregularly arranged.
7. The composite tape of claim 1, wherein,
the composite adhesive tape further comprises an electrostatic shielding layer, wherein the electrostatic shielding layer is positioned between the buffer layer and the protective layer;
the electrostatic shielding layer comprises at least one cutting line positioned in the first area; the included angle between the extending direction of the cutting line and the first direction is theta, and theta is less than or equal to 10 degrees;
when the composite adhesive tape is attached to the surface of the object, the first direction is parallel to the axial direction of the bending portion, wherein the bending portion bends around the axial direction.
8. The composite tape of claim 7, wherein,
the bending part comprises a first area, a second area and a third area which are sequentially connected along the bending direction of the bending part; the position with the smallest curvature radius in the bending part is positioned in the second area;
the cut line corresponds to the second region when the composite tape is attached to the object surface.
9. The composite tape of claim 7, wherein,
the electrostatic shielding layer comprises a stacked supporting layer and a conductive layer, wherein the conductive layer is positioned on one side of the supporting layer far away from the buffer layer.
10. The composite tape of claim 7, wherein,
in the first region, a plurality of the cutting lines are arranged in a row in the first direction.
11. The composite tape of claim 7, wherein,
and in the first area, a plurality of cutting lines are irregularly arranged.
12. The composite tape of claim 1, wherein,
the first region further includes a non-porous region surrounding the aperture;
at least part of the surface of the protection layer, which is far away from the buffer layer, is covered with a magnetic material in the non-hole area.
13. A display module comprising the composite tape of any one of claims 1 to 12; the display module further comprises a display panel, and the composite adhesive tape is attached to the surface of the display panel.
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| CN202210134407.8A CN114316830B (en) | 2022-02-14 | 2022-02-14 | Composite adhesive tape and display module |
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| CN114316830B true CN114316830B (en) | 2023-12-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115320084B (en) * | 2022-06-28 | 2024-10-29 | 武汉天马微电子有限公司 | Bonding device and bonding method |
| CN115294866B (en) * | 2022-08-01 | 2024-01-02 | 厦门天马显示科技有限公司 | Composite adhesive tape, molding method thereof, display panel and display device |
| CN115181508A (en) * | 2022-08-12 | 2022-10-14 | 厦门天马显示科技有限公司 | Composite adhesive tape and display panel comprising same |
| CN115588357A (en) * | 2022-08-24 | 2023-01-10 | 合肥维信诺科技有限公司 | Display panel and display device |
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| CN107871770A (en) * | 2016-09-27 | 2018-04-03 | 三星显示有限公司 | Display device |
| CN111976249A (en) * | 2020-08-20 | 2020-11-24 | 合肥维信诺科技有限公司 | Composite foam layer and display module |
| CN113178133A (en) * | 2021-05-06 | 2021-07-27 | 合肥维信诺科技有限公司 | Composite support film and display device |
| CN113442543A (en) * | 2020-03-24 | 2021-09-28 | 京东方科技集团股份有限公司 | Bonding device and bonding method of display substrate |
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| CN107871770A (en) * | 2016-09-27 | 2018-04-03 | 三星显示有限公司 | Display device |
| CN113442543A (en) * | 2020-03-24 | 2021-09-28 | 京东方科技集团股份有限公司 | Bonding device and bonding method of display substrate |
| CN111976249A (en) * | 2020-08-20 | 2020-11-24 | 合肥维信诺科技有限公司 | Composite foam layer and display module |
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