CN216273877U - Novel composite adhesive tape, display panel and display device - Google Patents

Abstract

The embodiment of the application provides novel composite adhesive tape and module structure, display panel and display device thereof to solve the soft texture of the cotton layer of composite adhesive tape bubble, easily lead to the screen body to appear local damage when crooked and arouse the problem of showing badly. The application provides a novel compound sticky tape is including the viscidity glue film and the conductive heat layer of range upon range of setting, compound sticky tape includes flat district and treats the bending area, treat that the at least part of the conductive heat layer in bending area sets up to latticed, adopts viscidity glue film self to have stronger viscidity, and the conductive heat layer replaces Cu paper tinsel and support membrane (PI) in addition, reduces compound sticky tape stromatolite, effectively reduces preparation process flow and reduce cost. The bending area of the conductive thermal layer is designed in a graphical mode, the bending performance of the conductive thermal layer designed in the graphical mode is improved, the elastic stress of the conductive thermal layer in the bending area can be obviously reduced after the conductive thermal layer is attached, and the risk of the composite adhesive tape Peeling is reduced.

Description

Novel composite adhesive tape, display panel and display device

Technical Field

The application relates to the technical field of display, in particular to a novel composite adhesive tape, a display panel and a display device.

Background

An organic light-emitting diode (OLED) has the advantages of self-luminescence, wide working temperature range, fast response speed, wide viewing angle, high luminous efficiency, capability of being manufactured on a flexible substrate, low driving voltage and energy consumption, and the like, and is known as a next generation display technology.

The composite tape (SCF) of the flexible OLED display module is attached to the back of the screen body and used for protecting the screen body and shading light, and for an OLED mobile phone, the composite tape generally comprises grid glue, foam, PI (support film) and copper foil which are arranged in a stacked mode. The composite adhesive tape is attached to the back of the screen body through the grid adhesive, the foam mainly plays a role in light absorption and buffering, the Cu foil plays a supporting role, and in order to improve the defect of insufficient over-soft supporting force of the Cu foil, a layer of PI is added to supplement the support. The compound sticky tape Peeling in the bending region of module easily sends out to present compound sticky tape, reduces the product yield.

SUMMERY OF THE UTILITY MODEL

In view of this, the embodiment of the present application provides a novel composite tape, a display panel and a display device, so as to solve the problem that a composite tape (SCF) foam layer is soft in texture and is prone to cause local damage to a screen body during bending, which causes poor display.

The embodiment of the application provides a novel compound sticky tape, include: the composite adhesive tape comprises a flat area and an area to be bent, wherein at least part of the conductive thermal layer in the area to be bent is arranged into a grid shape.

In an embodiment of the present application, all of the conductive thermal layers in the region to be bent are arranged in a grid shape.

In an embodiment of the application, the grid-like shape comprises at least one through hole.

In an embodiment of the present application, the through hole is any one of a circle, an ellipse, a rectangle, a rounded rectangle, a diamond, and a triangle.

In an embodiment of the present application, the through holes are uniformly distributed in the conductive thermal layer of the region to be bent.

In an embodiment of the present application, the adhesive glue layer comprises OCA glue.

In an embodiment of the present application, the OCA glue is black OCA glue.

In an embodiment of the present application, the conductive thermal layer comprises a sheet of stainless steel.

In a second aspect, an embodiment of the present application provides a display panel, which includes a cover plate and any of the above-described novel composite tapes provided to the cover plate.

In a third aspect, an embodiment of the present application provides a display apparatus, which includes an electronic device and the above-mentioned display panel in signal connection with the electronic device.

The application provides a novel composite adhesive tape is including the viscidity glue film and the conductive heat layer of range upon range of setting, composite adhesive tape is including flat district and waiting to bend the district, wait that the conductive heat layer's of bending zone at least part sets up to the net

The form adopts viscidity glue film self to have stronger viscidity, has reduced the layering/Peeling off (Peeling) risk between compound sticky tape (SCF) stromatolite and compound sticky tape and the screen body to viscidity glue film texture is inseparable, and elastic modulus is far above the bubble cotton, not only can effectively cushion the face power, can also be fine with the less point power dispersion of lifting surface area for the face power, effectively protect the screen body. In addition, the conductive thermal layer replaces a Cu foil and a support film (PI), the conductive thermal layer has excellent support performance and good electrical conductivity and thermal conductivity, can replace a Cu foil and PI two-layer structure, reduces lamination of a composite adhesive tape, effectively reduces the manufacturing process flow and reduces the cost, a to-be-bent area of the conductive thermal layer is subjected to graphical design, the bending performance of the graphically-designed conductive thermal layer is improved, the rebound stress of the conductive thermal layer in a bent area can be obviously reduced after a screen body is attached, and the risk of Peeling of the composite adhesive tape is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a prior art composite tape;

FIG. 2 is a schematic structural diagram of a prior art flexible surface module;

FIG. 3 is a schematic structural view of a novel composite tape according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a region to be bent of a novel composite tape according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram illustrating patterning of a region to be bent according to an embodiment of the present application.

Description of reference numerals:

1-cover plate; 1 a-arc edge of cover plate; a-a bending region; b-a flat region; 2-grid glue; 3-soaking cotton; 4-supporting the membrane; 5-copper foil; 6-conductive thermal layer; 7-a viscous glue layer; 8-through holes.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Where the terms "comprising," "having," and "including" are used herein, another element may be added unless an explicit limitation is used, such as "only," "consisting of … …," etc. Unless mentioned to the contrary, terms in the singular may include the plural and are not to be construed as being one in number.

For a further understanding of the present application, reference will now be made in detail to the following examples.

In the prior art, a composite tape (SCF) of the flexible OLED display module is attached to the back of a screen body and used for protecting the screen body and shading light, but the composite tape easily causes the composite tape Peeling in the bending area of the module to be high, and the yield of products is reduced.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a composite tape in the prior art. In the prior art, the composite adhesive tape comprises grid adhesive 2, foam 3, a support film (PI)4 and a copper foil 5 which are stacked. The composite adhesive tape is attached to the back of the screen body through the grid adhesive 2, the foam 3 mainly plays a role in light absorption and buffering, the Cu foil 4 plays a supporting role, and in order to improve the defect of insufficient over-soft supporting force of the Cu foil 4, a layer of supporting film (PI)4 is added to supplement the support.

Fig. 2 is a schematic structural diagram of a flexible curved surface module in the prior art. Referring to fig. 2, a composite tape (SCF) is attached to the flexible OLED display back cover plate 1 for protecting the screen body and shielding light. Because the foam 3 is soft, the cushion effect on the stress surface can be good, but for the point force with small stress area, such as the welding spot on an FPC or a mainboard, a small device and the like, the soft foam 3 can not disperse the large point force into the small surface force, and the local damage in the screen body is easily caused. In addition, for the fixed-curve module, the composite adhesive tape in the area to be bent has a springback stress, and as the laminated layers of the composite adhesive tape are more, if the springback stress is greater than the adhesive force between the laminated layers or the grid adhesive 2, the composite adhesive tape is delaminated/peeled (Peeling) at the arc edge 1a of the cover plate, for example, particularly under the high-temperature and high-humidity condition, the Peeling of the composite adhesive tape in the bending area of the module is more easily caused, and the product yield is reduced.

In view of this, the present application provides a novel composite tape, and fig. 3 is a schematic structural diagram of the novel composite tape provided in an embodiment of the present application. Fig. 4 is a schematic structural view of a position of a region to be bent of a novel composite tape according to an embodiment of the present application. Referring to fig. 3-4, the novel composite tape includes a sticky adhesive layer 6 and a conductive thermal layer 7, which are stacked, the composite tape includes a region to be bent a and a flat region B, the bent region a is generally disposed on two sides of the flat region B, and at least a portion of the conductive thermal layer of the region to be bent a is disposed in a grid shape. Wherein, adopt viscidity glue film 6 to replace grid glue 2 and bubble cotton layer 3, viscidity glue film 6 self has stronger viscidity, has reduced the layering/Peeling off (Peeling) risk between compound sticky tape (SCF) stromatolite and compound sticky tape and the screen body to the texture is inseparable, and elastic modulus is far above the bubble cotton, not only can effectively cushion the face power, can also be fine with the less point power dispersion of lifting surface area for the face power, effectively protect the screen body. In addition, the conductive thermal layer 7 replaces a Cu foil and a support film (PI), the conductive thermal layer 7 has excellent support performance and good electrical conductivity and thermal conductivity, can replace a Cu foil and PI two-layer structure, reduces lamination of a composite adhesive tape, effectively reduces manufacturing process flows and reduces cost. At least part of the electric heating layer 7 is arranged in a grid shape, the bending performance of the conductive heat layer 7 in the grid shape design is improved, the rebound stress of the conductive heat layer 7 in the region A to be bent can be reduced after the conductive heat layer is attached, and the risk of Peeling of the composite adhesive tape is reduced.

In the embodiment of the application, all the conductive thermal layers 7 in the region A to be bent are arranged in a grid shape, the larger the area of the grid shape is, the better the bendability of the conductive thermal layers 7 is, the rebound stress of the conductive thermal layers 7 in the region A to be bent can be obviously reduced after the conductive thermal layers are attached, and the risk of the composite adhesive tape Peeling is reduced. However, due to the influence of the process or other factors, sometimes a part of the area cannot be gridded, and also can be partially gridded.

In an embodiment of the present application, fig. 5 is a schematic structural diagram illustrating a patterning of a region to be bent provided in an embodiment of the present application. Referring to fig. 5, the grid shape of the conductive thermal layer in the region to be bent includes a plurality of through holes 8, and the through holes are any one of circular, oval, rectangular, rounded rectangular, diamond-shaped, and triangular. The shape of through-hole 8 is little to the influence of bendability, can be arbitrary shape, generally can select shape commonly used, and the size and the quantity of through-hole 8 can have the influence to bendability, can set up according to the size and the actual demand of treating the bending zone, and too much injecing is not done to this application, and is better in order to use convenience and effect usually, and the through-hole can select same shape.

In the embodiment of the present application, the through holes 8 are uniformly distributed on the conductive thermal layer 7 in the region to be bent. When the bending pressure is borne, the stress of each area is uniform, the composite adhesive tape Peeling caused by overlarge stress of partial areas can not be caused, and in addition, the process manufacturing is also convenient.

In the embodiment of the application, the adhesive layer 6 can be selected from OCA adhesive, which is an important material, optical acrylic adhesive is made into a non-substrate, and then a release film is respectively attached to the upper and lower bottom layers, so that the double-sided adhesive tape is a non-substrate material. The adhesive is the best adhesive for display screens, and has the advantages of high clarity, high light transmittance (total light transmittance is more than 99%), high adhesion, high weather resistance, water resistance, high temperature resistance, ultraviolet resistance, controlled thickness, uniform spacing, and no yellowing, peeling and deterioration after long-term use. OCA glue has stronger viscidity, has reduced the Peeling risk between compound sticky tape stromatolite and compound sticky tape and the screen body to the texture is inseparable, and elastic modulus is far above the bubble cotton, not only can effectively cushion the face power, can also be fine with the less point power dispersion of lifting surface area for the face power, effectively protect the screen body.

In the embodiment of this application, black OCA is glued to OCA meeting selection, and black OCA glues and can play fine shading effect like black bubble is cotton. When the screen body is attached, the absorption of light can be realized, and the light reaching the shading layer can be effectively prevented from irradiating the screen body through transmission or reflection.

In the embodiment of the present application, the conductive thermal layer 7 comprises stainless steel sheets, wherein the stainless steel sheets can be 304 stainless steel, 304 stainless steel has good corrosion resistance, heat resistance, low-temperature strength and mechanical properties, good hot workability such as stamping and bending, no heat treatment hardening phenomenon and no magnetism. Replace Cu paper tinsel and PI with nonrust steel sheet, nonrust steel sheet has excellent support nature, good electric conductivity and thermal conductivity, can replace Cu paper tinsel and support membrane (PI) two-layer structure, reduce compound sticky tape stromatolite, effectively reduce compound sticky tape preparation process flow and reduce cost, treat the bending zone with nonrust steel sheet and do latticed design simultaneously, nonrust steel sheet can buckle the performance and improve, can show the rebound stress who reduces bending area steel sheet after attaching, compound sticky tape Peeling risk has been reduced, flat area does not do latticed processing in addition, select for use nonrust steel sheet to guarantee the stiffness of flat area, the flat area has FPC, compound sticky tape stiffness not enough can cause the moulding seal to be bad when FPC device area pressfitting.

In an embodiment of the present application, a display panel is further provided. With continued reference to fig. 2, the display panel includes a cover plate 1 and a novel composite tape disposed on the cover plate 1, wherein the novel composite tape may be the novel composite tape mentioned in any of the above embodiments. The display panel can be a flexible OLED display panel and can also be a curved OLED display panel. Of course, those skilled in the art can understand that, in addition to the display panel described above, the display panel may further include an organic light emitting diode, an OLED device, and other modules, which will not be described herein again based on the knowledge of those skilled in the art.

In an embodiment of the present application, a display device is also provided. The display device comprises an electronic device and a display panel in signal connection with the electronic device, wherein the electronic device may comprise an electronic device such as a sensor and a controller, and the display device may be the display device comprising the novel composite tape mentioned in the above embodiments. The display device described in the present application may further include necessary structures and components of a conventional display device, and a mobile phone is taken as an example for description, and besides the display panel of the present application, the display device may further include structures and components of a conventional mobile phone, such as a touch screen, a housing, a CPU, a camera module, a fingerprint identification module, a sound processing system, and the like. It should be understood that the display device includes, but is not limited to, any product or component having a display function, such as a liquid crystal panel, an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator. Accordingly, the display device also has the same technical effects as the display panel, and the details are not repeated herein.

The utility model provides a novel compound sticky tape is including the viscidity glue film and the conductive heat layer that range upon range of setting, compound sticky tape includes flat district and treats the bending zone, treat that the at least part of conductive heat layer in bending zone sets up to latticed, adopts viscidity glue film self to have stronger viscidity, has reduced layering/Peeling off (Peeling) risk between compound sticky tape (SCF) stromatolite and compound sticky tape and the screen body to the texture is inseparable, and elastic modulus is far above the bubble cotton, not only can effectively cushion the face power, can also be fine with the less point power dispersion of lifting surface area for the face power, effectively protects the screen body. In addition, the conductive thermal layer replaces a Cu foil and a support film (PI), the conductive thermal layer has excellent support performance and good electrical conductivity and thermal conductivity, can replace a Cu foil and PI two-layer structure, reduces lamination of a composite adhesive tape, effectively reduces the manufacturing process flow and reduces the cost, the bending area of the conductive thermal layer is designed in a graphical mode, the bending performance of the conductive thermal layer designed in the graphical mode is improved, the rebound stress of the conductive thermal layer in the bending area can be obviously reduced after the conductive thermal layer is attached, and the Peeling risk of the composite adhesive tape is reduced.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the combination and combination of features of different embodiments or examples and different embodiments or examples described in this specification can be performed by those skilled in the art without contradiction, and the combination of these features should be considered as the scope of the description in this specification as long as there is no contradiction between the features.

The above description is only a preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present disclosure, and such changes or variations should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. The novel composite adhesive tape is characterized by comprising a viscous adhesive layer and a conductive thermal layer which are arranged in a stacked mode, wherein the composite adhesive tape comprises a flat area and an area to be bent, and at least part of the conductive thermal layer of the area to be bent is arranged into a grid shape.

2. The novel composite tape as claimed in claim 1, wherein the conductive thermal layers of the region to be bent are all arranged in a grid shape.

3. The novel composite tape of claim 2 wherein the grid pattern comprises a plurality of through holes.

4. The novel composite tape of claim 3, wherein the through hole is any one of circular, oval, rectangular, rounded rectangular, diamond-shaped, and triangular.

5. The novel composite tape as claimed in any one of claims 3 to 4, wherein the through holes are uniformly distributed in the conductive thermal layer of the region to be bent.

6. The novel composite tape of claim 1 wherein the adhesive glue layer comprises OCA glue.

7. The novel composite tape of claim 6 wherein the OCA glue is a black OCA glue.

8. The novel composite tape of claim 1, wherein the thermally conductive layer comprises a sheet of stainless steel.

9. A display panel, comprising:

a cover plate; and

the novel composite tape of any one of claims 1 to 8 provided to the cover sheet.

10. A display device, comprising:

an electronic device; and

the display panel of claim 9 in signal connection with the electronics.

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