CN112011277A

CN112011277A - Adhesive tape and preparation method of display panel

Info

Publication number: CN112011277A
Application number: CN202010893721.5A
Authority: CN
Inventors: 卿馨; 曾利; 舒洋; 汤强
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2020-12-01
Anticipated expiration: 2040-08-31
Also published as: CN112011277B

Abstract

The embodiment of the application discloses a preparation method of an adhesive tape and a display panel, wherein the adhesive tape comprises the following components: the adhesive comprises a release film, a colloid, first foam and second foam; the first side surface of the colloid is attached to the first side surface of the release film; the first foam and the second foam are positioned on two sides of the colloid and are respectively and fixedly connected to the surface of the first side of the release film. This sticky tape is through the attached type membrane that leaves in the surface of colloid, can make things convenient for adsorption equipment to adsorb the sticky tape to prevent that the colloid from not being contaminated when being removed, it is cotton through the first bubble that sets up and second bubble, make the sticky tape easily adsorbed, still can effectively prevent that the sticky tape from producing the fold.

Description

Adhesive tape and preparation method of display panel

Technical Field

The present application relates to the field of display technology. And more particularly, to a method for manufacturing an adhesive tape and a display panel.

Background

In recent years, a high screen ratio has become a mainstream design scheme in the display field and is favored by consumers. Because the flexible display OLED has the advantages of being foldable, rollable, thin and convenient to carry, and can be produced by low-cost processes such as ink-jet printing, more design ideas are provided for terminal products. The effect of a narrow frame can be realized by bending the position of the pixel outgoing line connected to the external circuit by utilizing the flexibility of the flexible substrate. After the display panel is bent, the upper surface and the lower surface which are opposite after bending are bonded together through the double faced adhesive tape.

Along with the lower frame of display panel is narrower and narrower, this bending radius that just needs display panel is littleer and smaller, and after the bending radius reduces, the glue film that is used for bonding display substrate bending region also needs to be thinner and thinner, and under such thickness, the glue film can be hardly adsorbed by adsorption equipment, and has fold scheduling problem after adsorbing easily appearing.

Disclosure of Invention

The present application is directed to a method for manufacturing an adhesive tape and a display panel, so as to solve at least one of the problems in the prior art.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the application provides in a first aspect an adhesive tape for use in display panel assembly, the adhesive tape comprising: the adhesive comprises a release film, a colloid, first foam and second foam; the first side surface of the colloid is attached to the first side surface of the release film; the first foam and the second foam are located on two sides of the colloid and are respectively fixedly connected to the first side surface of the release film.

The sticky tape that this application first aspect provided, through the attached type membrane that leaves in the surface of colloid, can make things convenient for adsorption equipment to adsorb the sticky tape, and prevent that the colloid from not being contaminated when being removed, it is cotton through the first bubble and the second bubble that set up, so that when being adsorbed by adsorption equipment from the type membrane, be adsorbed easily, can not produce the fold, and, because the bubble cotton has high compression performance, therefore when attached colloid, the bubble cotton can be compressed to the thickness the same with the colloid, can not produce the segment difference.

In a possible implementation manner, the first foam and the second foam are arranged at positions corresponding to the first adsorption head and the second adsorption head of the adsorption equipment for adsorbing the glue layer respectively.

This implementation way sets up first bubble cotton and second bubble cotton at the first side surface from the type membrane, and the thickness of multiplicable absorption position makes things convenient for adsorption equipment to adsorb the sticky tape to this prevents that the sticky tape from producing the fold when being adsorbed.

In a possible implementation manner, the lengths of the first foam and the second foam are the same and are greater than the adsorption calibers of the first adsorption head and the second adsorption head.

In this implementation, the length of two bubble cottons is set up to be greater than the absorption bore of absorption head and can make things convenient for adsorption equipment to adsorb the sticky tape, further guarantees the eliminating effect to the fold that the sticky tape produced when being adsorbed.

In a possible implementation manner, the thicknesses of the first foam and the second foam are the same and are greater than the thickness of the colloid.

This implementation mode keeps two cotton thickness of bubble the same, can further guarantee the eliminating effect to the fold that the sticky tape produced when being adsorbed, and can guarantee that when attached colloid, the thickness that two bubbles compressed is the same, prevents that the sticky tape from appearing the segment difference problem.

In a possible implementation manner, the outer edge of the first foam and the outer edge of the second foam are respectively located on the inner side of the outer edge of the release film.

In this implementation, set up two bubble cottons respectively in the inboard of the outside edge from the type membrane, can promote to tearing from the convenience of type membrane.

In one possible implementation, the colloid is a PET colloid.

In the implementation mode, the PET belongs to a material which is easy to bond, the PET colloid prepared by the material has no whitening phenomenon during bonding, and the solidified colloid has certain flexibility.

In one possible implementation, the thickness of the release film is greater than 200 μm.

In this implementation, more traditional from the type membrane, increased thickness, make things convenient for adsorption equipment to adsorb, and can prevent that the fold from appearing in the sticky tape.

A second aspect of the present application provides a method for manufacturing a display panel, the method including:

for the adhesive tape provided by the first aspect of the present application, a first adsorption head and a second adsorption head of an adsorption device are used to adsorb the second side surface of the release film, and the adhesive tape is placed in a frame bending region of the display panel;

pressing the second side surface of the release film by using a pressing head so that the second side surface of the colloid is bonded with the first part of the frame bending area of the display panel;

tearing off the release film;

and bending the second part of the frame bending region of the display panel towards the back side of the display panel and then adhering the second part to the first side surface of the colloid.

According to the preparation method of the display panel, the adhesive tape is adopted for bonding the film materials of the display panel, and the foam on the two sides of the adhesive tape enables the adsorption equipment to easily adsorb the adhesive tape, so that the adhesive tape is not easy to wrinkle, and the quality of the display panel is further ensured.

In one possible implementation, the adhesive tape to be adsorbed is loaded using a tray loading manner.

In the realization mode, the adhesive tape is loaded by adopting a tray loading mode, so that the adsorption efficiency of the adsorption equipment can be improved, and the working process is accelerated.

In one possible implementation manner, the adsorbing the second side surface of the release film by using the first adsorption head and the second adsorption head of the adsorption apparatus includes: and using a first adsorption head and a second adsorption head with the same adsorption parameter setting to adsorb the second side surface of the release film.

In this implementation, the two adsorption heads using the same adsorption parameters can prevent the problem of tape wrinkles caused by the adsorption equipment when adsorbing the tape.

The beneficial effect of this application is as follows:

the technical scheme that this application provided, through the attached type membrane that leaves in the surface of colloid, can make things convenient for adsorption equipment to adsorb the sticky tape, and prevent that the colloid from not being contaminated when being removed, first bubble cotton and second bubble cotton through setting up, adsorption equipment is when adsorbing the sticky tape, absorb respectively from the correspondence of type membrane and set up the cotton position of first bubble cotton and second bubble, make the sticky tape adsorbed easily, still can effectively prevent that the sticky tape from producing the fold, and, because first bubble cotton and second bubble cotton have high compression performance, consequently when the colloid is attached to display panel, the bubble cotton can be compressed to the thickness the same with the colloid, can not produce the poor problem of section.

Drawings

The following describes embodiments of the present application in further detail with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of a display panel in the prior art.

Fig. 2 shows a schematic diagram of a prior art adhesive tape structure.

Fig. 3 shows a schematic view of a structure of an adhesive tape provided by an embodiment of the present application.

Fig. 4 shows a schematic view of an adsorption apparatus adsorbing an adhesive tape provided by an embodiment of the present application.

Fig. 5 is a flowchart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure.

Fig. 6 shows a schematic structural diagram of a tray in a tray loading manner according to an embodiment of the present application.

Reference numeral, 10, a frame bending region of the display panel; 11. a first portion of the frame bending region; 12. a second portion of the frame bending region; 20. a glue layer; 21. a release film; 22. a colloid; 23. first foam; 24. second foam; 31. a first adsorption head; 32. and a second adsorption head.

Detailed Description

In order to more clearly explain the present application, the present application is further described below with reference to the embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not intended to limit the scope of the present application.

Because flexible display screen compares in traditional screen, not only more frivolous in the volume, also be less than original device in the consumption, help promoting the duration of equipment, simultaneously based on the characteristics that its flexible, pliability are good, its durable degree also is higher than the screen in the past greatly, reduces the unexpected probability of damaging of equipment, consequently, needs to improve gradually to flexible display screen's technique.

At present, the lower frame of the flexible display panel is required to be narrower and narrower, and in order to achieve the effect of the narrow frame, the bendable performance of the flexible panel is generally utilized, after the pixel outgoing line is connected to the position of the external circuit, the upper surface and the lower surface which are opposite after being bent are bonded together through the double faced adhesive tape. For example, in the display panel shown in fig. 1, only the frame bending region 10 and the adhesive layer 20 of the display panel are shown here, and for convenience of understanding and description, the frame bending region 10 of the display panel is divided into a first portion 11 of the frame bending region and a second portion 12 of the frame bending region, and the second portion 12 of the frame bending region is located on the back side of the display region after being bent, so as to achieve the narrow frame effect of the curved display screen.

After the frame bending region 10 of the display panel is bent, a first part 11 of the frame bending region and a second part 12 of the frame bending region are enclosed to form an accommodating space, in order to avoid the second part 12 of the bent frame bending region from being in a suspended state, in the invention, an adhesive layer 20 is filled in the accommodating space, the adhesive layer 20 is used for bonding and fixing the first part 11 of the frame bending region and the second part 12 of the frame bending region, and the adhesive layer 20 is also used for supporting the second part 12 of the frame bending region, so that the impact resistance of the display panel is prevented from being reduced because the second part 12 of the frame bending region is in a suspended state.

With the lower frame of the display panel becoming narrower and narrower, the bending radius of the flexible display substrate needs to be smaller and smaller, and after the bending radius is reduced, the adhesive layer used for bonding the bending area of the flexible display substrate needs to be thinner and thinner, and under the thickness, the adhesive layer can be hardly adsorbed by adsorption equipment, or the adsorption has the problems of wrinkles and the like.

As shown in fig. 2, the conventional adhesive tape structure includes a release film 201 and a colloid 202, and due to the small thickness of the release film 201 and the colloid 202, when the conventional adhesive tape is absorbed by an absorption device, the conventional adhesive tape structure has a problem that the conventional adhesive tape structure is difficult to absorb or has wrinkles when being absorbed.

To solve the above problem, an embodiment of the present application provides an adhesive tape, as shown in fig. 3, including: the adhesive comprises a release film 21, a colloid 22, first foam 23 and second foam 24; the first side surface of the colloid 22 (the upper surface of the colloid 22 in the figure) is attached to the first side surface of the release film 21 (the lower surface of the release film 21 in the figure); the first foam 23 and the second foam 24 are located on two sides of the colloid 22 and are respectively and fixedly connected to the first side surface of the release film 21.

The sticky tape that this embodiment provided, through the attached release film 21 in the surface of colloid 22, can make things convenient for adsorption equipment to adsorb the sticky tape, and prevent that the colloid from not being contaminated when being removed, first bubble cotton 23 and the second bubble cotton 24 through setting up, adsorption equipment is when adsorbing the sticky tape, absorb the position that sets up first bubble cotton 23 and second bubble cotton 24 respectively, make the sticky tape adsorbed easily, still can effectively prevent the sticky tape and produce the fold, and, because first bubble cotton 23 and second bubble cotton 24 have high compression performance, consequently, when colloid 22 is attached to display panel, the bubble cotton can be compressed to the thickness the same with colloid 22, can not produce the poor problem of section.

In order to facilitate the suction of the adhesive tape by the suction device, in some embodiments, as shown in fig. 4, the first foam 23 and the second foam 24 are disposed at positions corresponding to the first suction head 31 and the second suction head 32, respectively, of the suction device for sucking the adhesive tape.

Because, set up the bubble cotton in particular position, adsorption equipment's adsorption head is when adsorbing the sticky tape, and adsorption equipment's the corresponding position that has set up the bubble cotton from the type membrane, and the weight that sets up bubble cotton department etc. all is bigger than other positions, can make things convenient for the adsorption head to adsorb the sticky tape.

In order to further increase the adsorption of the adsorption head to the adhesive tape, in some embodiments, the lengths of the first foam 23 and the second foam 24 are set to be the same and larger than the adsorption calibers of the first adsorption head 31 and the second adsorption head 32.

The longitudinal direction of the first foam 23 and the second foam 24 is the horizontal direction in fig. 3 and 4.

Set up first bubble cotton 23 and second bubble cotton 24 to same length, can keep first adsorption head 31 and second adsorption head 32 the adsorption affinity of sticky tape the same, avoid producing the fold to the sticky tape to because the cotton length of bubble is greater than the absorption bore of adsorption head, can make things convenient for the adsorption head to adsorb the sticky tape.

In some embodiments, the thickness of the release film 21 is set to be greater than 200 μm.

The thickness of the release film 21 is increased, so that the adhesive tape is easy to adsorb, and no wrinkles appear.

It should be noted that, after the adhesive tape is adhered to a specific position of the display panel, the release film 21 and the foam need to be torn off, that is, only the colloid portion of the adhesive tape is retained, and before tearing off, the adhesive tape needs to be pressed and the like to ensure that the colloid is completely adhered to the flexible display substrate.

In order to prevent a step difference from being generated between the gel and the flexible display substrate due to the non-uniform thickness of the foam when the tape is pressed, in some embodiments, the thicknesses of the first foam 23 and the second foam 24 are set to be the same thickness and greater than the thickness of the gel 22.

Note that the thickness direction of the first foam 23 and the second foam 24 is the vertical direction in fig. 3 and 4.

The thickness of the first foam 23 and the second foam 24 is larger than that of the colloid 22, so that the adhesive tape can be prevented from being polluted when touching other objects in the moving process, and the thickness of the foam can be compressed to be the same as that of the colloid when the adhesive tape is pressed due to the high compression performance of the foam, so that the colloid 22 is prevented from generating a step difference.

In order to facilitate tearing the release film 21 and the foam, in some embodiments, the outer edge of the first foam 23 and the outer edge of the second foam 24 are respectively located inside the outer edge of the release film 21.

In some embodiments, the gel 22 is a PET gel.

PET belongs to a material which is easy to bond, PET colloid prepared by the material has no whitening phenomenon during bonding, and the solidified colloid has certain flexibility.

Another embodiment of the present application provides a method for manufacturing a display panel based on the foregoing adhesive tape, as shown in fig. 1 to 5, the method for manufacturing a display panel including:

s100, adsorbing a second side surface (the upper surface of the release film 21 in FIG. 2) of the release film 21 of the adhesive tape by using a first adsorption head 31 and a second adsorption head 32 of an adsorption device, and placing the adhesive tape in a frame bending area 10 of the display panel;

in order to improve the adsorption efficiency of the adsorption equipment, in some embodiments, as shown in fig. 6, the adhesive tape to be adsorbed is loaded in a tray loading manner, and by adopting the loading manner, the efficiency of the adsorption equipment can be improved, and manpower, material resources and loading time are saved.

In some embodiments, the first suction head 31 and the second suction head 32 with the same suction parameters are used for sucking the second side surface of the release film 21, and the two suction heads with the same suction parameters ensure that the suction force at two suction positions of the suction device is the same, so that the problem of tape wrinkling caused by the suction device when sucking the tape can be prevented.

S200, pressing the second side surface of the release film 21 by using a pressing head so that the second side surface of the colloid 22 is bonded with the first part 11 of the frame bending area of the display panel;

s300, tearing off the release film 21;

it should be noted that, because the first foam 23 and the second foam 24 are adhered to the release film 21, the foam on both sides can be taken away at the same time when the release film 21 is torn away;

s400, bending the second portion 12 of the frame bending region of the display panel to the back side of the display panel, and then adhering the second portion to the first side surface of the glue 22 to form the structure shown in fig. 1, where the glue 22 adhering the final shape of the second portion 12 of the frame bending region of the display panel is the glue layer 20 in fig. 1.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is further noted that, in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the above-mentioned examples are given for the purpose of illustrating the present application clearly and not for the purpose of limiting the same, and that various other modifications and variations of the present invention may be made by those skilled in the art in light of the above teachings, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed.

Claims

1. An adhesive tape for use in assembling a display panel, the adhesive tape comprising: the adhesive comprises a release film, a colloid, first foam and second foam; the first side surface of the colloid is attached to the first side surface of the release film; the first foam and the second foam are located on two sides of the colloid and are respectively fixedly connected to the first side surface of the release film.

2. The adhesive tape according to claim 1, wherein the first foam and the second foam are positioned to correspond to a first suction head and a second suction head, respectively, of a suction device for sucking the adhesive tape.

3. The adhesive tape according to claim 2, wherein the first foam and the second foam have the same length and are larger than the suction apertures of the first suction head and the second suction head.

4. The tape of claim 1 wherein the first foam and the second foam are the same thickness and are greater than the thickness of the gel.

5. The adhesive tape according to claim 1, wherein the outer edges of the first foam and the second foam are respectively located inside the outer edge of the release film.

6. The adhesive tape of claim 1, wherein the gel is a PET gel.

7. The adhesive tape of claim 1, wherein the release film has a thickness greater than 200 μm.

8. A method for manufacturing a display panel, comprising:

for the adhesive tape of any one of claims 1-7, adsorbing the second side surface of the release film by using a first adsorption head and a second adsorption head of an adsorption device, and placing the adhesive tape in a frame bending area of a display panel;

tearing off the release film;

9. The production method according to claim 8, wherein the adhesive tape to be adsorbed is fed using a tray feeding manner.

10. The manufacturing method according to claim 8, wherein the adsorbing the second side surface of the release film using the first adsorption head and the second adsorption head of the adsorption apparatus includes: and using a first adsorption head and a second adsorption head with the same adsorption parameter setting to adsorb the second side surface of the release film.