CN111596786A - Display panel, display device and forming method thereof - Google Patents

Abstract

Embodiments of the present invention provide a display panel, a display device and a molding method thereof. The display panel has successively distributed display areas and bending areas in a first direction, and the display panel includes: an array substrate; and an adhesive layer disposed on the array substrate. On the surface, the adhesive layer includes an optical adhesive layer located in the display area and a decomposable adhesive layer located in the bending area. The decomposable adhesive layer is formed by coating the adhesive on the bending area. A decomposable material that decomposes; a cover plate, covering the side of the adhesive layer away from the array substrate. The embodiments of the present invention can solve the problem of air bubbles in the display panel.

Description

Display panel, display device and molding method thereof

technical field

The present invention relates to the field of display technology, and in particular, to a display panel, a display device and a forming method thereof.

Background technique

With the continuous update of display module technology, small-sized panels are gradually developing towards thinness, high screen-to-body ratio, ultra-narrow bezels or even borderless. A display panel with a traditional structure usually includes a display area and a non-display area on the periphery of the display area, and the non-display area is used for arranging and binding flexible circuits.

In order to further reduce the occupied area of the non-display area, the non-display area is usually designed to be bent, that is, the non-display area is also the bending area of the display panel. In order to prevent problems such as corrosion of the binding flexible circuit in the bending area, an adhesive layer will be applied in the bending area. Due to the limitation of the coating process, the adhesive layer in the bending area may overflow to the display area, causing interference between the adhesive in the bending area and other layer structures of the display panel, causing other layer structures to lift up and making the cover plate unable to be fully attached. combined, resulting in bubbles in the display panel.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a display panel, a display device, and a molding method thereof, aiming at solving the problem of air bubbles in the display panel.

In one aspect, an embodiment of the present invention provides a display panel, the display panel has successively distributed display areas and bending areas in a first direction, the display panel includes: an array substrate; an adhesive layer, disposed on the surface of the array substrate, the adhesive layer The layer includes an optical adhesive layer disposed in the display area and a decomposable adhesive layer disposed in the bending area. The decomposable adhesive layer includes a decomposable material that can be decomposed when a preset condition is met; the cover plate covers the adhesive layer and faces away from the array. side of the substrate.

According to an embodiment of an aspect of the present invention, the decomposable material includes at least one of a photolyzable material, a pyrolyzable material, or a dissolvable material;

Preferably, the preset conditions are lighting conditions, and the decomposable materials include photodecomposable materials;

Preferably, the decomposable material includes triazene-based polymers.

According to any one of the foregoing embodiments of an aspect of the present invention,

The decomposable adhesive layer is located in the bending area;

Preferably, the thickness of the decomposable adhesive layer is 80 μm˜120 μm;

Preferably, the distance between the decomposable adhesive layer and the optical adhesive layer in the first direction is 150 μm˜250 μm.

According to any one of the aforementioned embodiments of an aspect of the present invention, the decomposable adhesive layer includes a first subsection located in the display area and a second subsection located in the bending area, the first subsection and the second subsection are successive in the first direction distribution, and the thickness of the first subsection is less than or equal to the thickness of the optical adhesive layer;

Preferably, the thickness of the second subsection is 80 μm˜120 μm;

Preferably, the thickness of the first subsection is less than or equal to 25 μm;

Preferably, the distance between the first subsection and the optical adhesive layer in the first direction is 150 μm˜250 μm.

On the other hand, an embodiment of the present invention further provides a display device including the above-mentioned display panel.

In another aspect, an embodiment of the present invention also provides a method for forming a display panel, wherein the display panel has successively distributed display areas and bending areas in a first direction, and the method includes:

Coating glue on the array substrate, the glue includes a decomposable material that can decompose when a preset condition is met;

Decomposing the decomposable material applied to the display area to form a decomposable adhesive layer;

Coating an optical adhesive material on the array substrate to form an optical adhesive layer in the display area;

A cover plate is covered on the side of the decomposable adhesive layer and the optical adhesive layer facing away from the array substrate to form a display panel.

According to an embodiment of an aspect of the present invention, the preset condition is an illumination condition, the decomposable material includes a photodecomposable material, and the decomposable material coated on the display area is decomposed, and the step of forming the decomposable adhesive layer includes:

A first mask plate with a first opening is covered on the side of the decomposable adhesive layer away from the array substrate, and the first opening is disposed corresponding to the decomposable material in the display area;

The sizing material is irradiated with decomposing light to decompose the decomposable material located in the display area to form a decomposable adhesive layer.

According to any one of the aforementioned embodiments of one aspect of the present invention, the preset condition is lighting conditions, the decomposable material includes a photodegradable material, and after the step of decomposing the decomposable material coated on the display area to form a decomposable adhesive layer, the method further includes: include:

Covering a second mask with a second opening on the side of the decomposable adhesive layer away from the array substrate, so that the decomposable adhesive layer is exposed by the second opening;

The decomposable adhesive layer is irradiated with decomposing light, so that at least a part of the decomposable adhesive layer on the side away from the array substrate is decomposed, so that the thickness of the decomposable adhesive layer is within a preset thickness range.

According to any one of the foregoing embodiments of an aspect of the present invention, the decomposed light is pulsed laser light.

According to any one of the foregoing embodiments of an aspect of the present invention, the wavelength of the decomposed light is greater than or equal to 400 nm; preferably, the wavelength of the decomposed light is 500 nm to 550 nm.

In the display panel of the embodiment of the present invention, the display panel includes an array substrate, an adhesive layer and a cover plate. The adhesive layer is coated on the array substrate, and the adhesive layer includes an optical adhesive layer located in the display area and a decomposable adhesive layer located in the bending area. Since the decomposable adhesive layer includes decomposable materials that can be decomposed when a preset condition is met, the decomposable adhesive layer can be decomposed. During the molding process of the display panel, the decomposable adhesive layer can be decomposed, so that in the display panel after molding, the setting range and thickness of the decomposable adhesive layer are within an appropriate range, avoiding the decomposable adhesive layer and other parts of the display panel. The interference at the position of the layer structure enables the cover plate to be completely adhered to the decomposable adhesive layer, thereby preventing the display panel from generating air bubbles.

Description of drawings

Other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar features.

FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present invention;

2 is a cross-sectional view of FIG. 1 provided by an embodiment of the present invention;

3 is a cross-sectional view of FIG. 1 according to another embodiment of the present invention;

4 is a schematic diagram of an exploded structure of a display panel provided by an embodiment of the present invention;

5 is a flowchart of a method for forming a display panel according to an embodiment of the present invention;

6 is a flowchart of a method for forming a display panel according to another embodiment of the present invention;

7 is a flowchart of a method for forming a display panel according to another embodiment of the present invention;

8a to 8h are process flow diagrams of a method for forming a display panel according to an embodiment of the present invention.

Description of reference numbers:

100. Array substrate;

200, adhesive layer; 210, optical adhesive layer; 220, decomposable adhesive layer; 221, first subsection; 222, second subsection;

300, touch screen;

400, polarizer;

500, cover plate;

600, a first mask; 610, a first opening;

700, a second mask plate; 710, a second opening.

Detailed ways

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present invention by illustrating examples of the invention. In the drawings and the following description, at least some well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention; and, the dimensions of some structures may be exaggerated for clarity. Furthermore, the features, structures or characteristics described below may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means more than two; the terms "upper", "lower", "left", "right", "inner", " The orientation or positional relationship indicated by "outside" is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a reference to the present invention. Invention limitations. Furthermore, the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

The orientation words appearing in the following description are all directions shown in the drawings, and do not limit the specific structures of the embodiments of the present invention. In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, or Connected integrally; either directly or indirectly. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In order to better understand the present invention, a display panel, a display device and a molding method thereof according to embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 8h.

FIG. 1 is a schematic structural diagram of a display panel according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view of FIG. 1 .

According to the display panel of the first embodiment of the present invention shown in FIG. 1 and FIG. 2 , the display panel has successively distributed display areas AA and bending areas PA in the first direction, and the display panel includes: an array substrate 100 ; an adhesive layer 200 , disposed on the surface of the array substrate 100, the adhesive layer 200 includes an optical adhesive layer 210 disposed in the display area AA and a decomposable adhesive layer 220 disposed in the bending area PA. The decomposable adhesive layer 220 includes The decomposable material that is decomposed; the cover plate 500 covers the side of the adhesive layer 200 away from the array substrate 100 .

In the display panel of the first embodiment of the present invention, the display panel includes an array substrate 100 , an adhesive layer 200 and a cover plate 500 . The adhesive layer 200 is coated on the array substrate 100 , and the adhesive layer 200 includes an optical adhesive layer 210 located in the display area AA and a decomposable adhesive layer 220 located in the bending area PA. Since the decomposable adhesive layer 220 includes a decomposable material that can be decomposed when a preset condition is met, the decomposable adhesive layer 220 can be decomposed. During the molding process of the display panel, the decomposable adhesive layer 220 can be decomposed, so that in the display panel after molding, the setting range and thickness of the decomposable adhesive layer 220 are within an appropriate range, so as to avoid the decomposable adhesive layer 220 and the display panel. The positional interference of the other layer structures of the panel enables the cover plate 500 to be completely adhered to the decomposable adhesive layer 220, thereby preventing the display panel from generating air bubbles.

In the embodiment of the present invention, there are various ways of setting the first direction, and the display area AA and the bending area PA may be distributed successively along the first direction. For example, the first direction is the X direction shown in FIG. 2 . The thickness direction is the stacking direction of the array substrate 100 , the adhesive layer 200 and the cover plate 500 . For example, the thickness direction is the Z direction shown in FIG. 2 .

As shown in FIG. 2, in some optional embodiments, the decomposable adhesive layer 220 is located in the bending area PA. That is, the decomposable adhesive layer 210 is not provided in the display area AA, so that the positional interference between the decomposable adhesive layer 210 and other layer structures of the display panel can be avoided.

For example, the display panel further includes a touch screen 300. The touch screen 300 is located in the display area AA and is disposed between the optical adhesive layer 210 and the cover plate 500. Since the decomposable adhesive layer 210 is located in the bending area PA, the touch screen 300 and the decomposable adhesive layer 220 Arranged side by side in the first direction. The positions of the touch screen 300 and the decomposable adhesive layer 220 do not interfere, so that the touch screen 300 is prevented from being lifted. This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

Alternatively, the display panel further includes a polarizer 400 located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500. Since the decomposable adhesive layer 220 is located in the bending area PA, the polarizer 400 and the decomposable adhesive layer 220 distributed side by side in the first direction. The positions of the polarizer 400 and the decomposable adhesive layer 220 will not interfere, so that the polarizer 400 will not be lifted. This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

For another example, the display panel includes both the touch screen 300 and the polarizer 400 , and the polarizer 400 is located on the side of the touch screen 300 away from the layer of optical glue 210 . The touch screen 300, the polarizer 400 and the decomposable adhesive layer 220 are arranged side by side in the first direction. The touch screen 300 and the polarizer 400 are prevented from being lifted. This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

Alternatively, please refer to FIG. 3 and FIG. 4 together. FIG. 3 is a cross-sectional view of FIG. 1 according to another embodiment of the present invention. FIG. 4 is an exploded view of a display panel according to an embodiment of the present invention.

In other optional embodiments, the decomposable adhesive layer 220 includes a first subsection 221 located in the display area AA and a second subsection 222 located in the bending area PA. The first subsection 221 and the second subsection 222 They are distributed successively in the first direction, and the thickness of the first subsection is less than or equal to the thickness of the optical adhesive layer 210 .

In these optional embodiments, since the thickness of the first sub-section 221 is less than or equal to the thickness of the optical adhesive layer 210 , some layer structures disposed on the optical adhesive layer 210 will not be in contact with the decomposable adhesive layer 220 . interference so as not to cause air bubbles on the display panel.

For example, the display panel further includes a touch screen 300. The touch screen 300 is located in the display area AA and is disposed between the optical adhesive layer 210 and the cover plate 500. Since the thickness of the first subsection 221 is less than or equal to the thickness of the optical adhesive layer 210, the touch screen 300 The touch screen 300 and the second subsection 222 are located on the side of the first subsection 221 away from the array substrate 100 , and are arranged side by side in the first direction. The positions of the touch screen 300 and the decomposable adhesive layer 220 do not interfere, so that the touch screen 300 is prevented from being lifted. This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

Alternatively, the display panel further includes a polarizer 400 located in the display area AA and disposed between the optical adhesive layer 210 and the cover plate 500. Since the thickness of the first sub-section 221 is less than or equal to the thickness of the optical adhesive layer 210, the polarizer 400 The polarizer 400 and the second subsection 222 are located on the side of the first subsection 221 away from the array substrate 100 , and are arranged side by side in the first direction. The positions of the polarizer 400 and the decomposable adhesive layer 220 will not interfere, so that the polarizer 400 will not be lifted. This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

For another example, the display panel includes both the touch screen 300 and the polarizer 400 , and the polarizer 400 is located on the side of the touch screen 300 away from the optical adhesive layer 210 . The touch screen 300 and the polarizer 400 are located on the side of the first subsection 221 away from the array substrate 100 , and the touch screen 300 , the polarizer 400 and the second subsection 222 are arranged side by side in the first direction. Avoid lifting of the touch screen 300 and the polarizer 400 . This further avoids the problem of air bubbles caused by the inability of the cover plate 500 to be completely attached.

The material of the optical adhesive layer 210 can be set in various ways. For example, the material of the optical adhesive layer 210 includes epoxy resin. The optical transmittance of the optical adhesive layer 210 is, for example, greater than or equal to 50%, preferably, the optical transmittance of the optical adhesive layer 210 is greater than or equal to 85%, so that the optical adhesive layer 210 does not affect the normal display of the display panel. The thickness of the optical adhesive layer 210 is, for example, less than or equal to 25 μm. At this time, the thickness of the first subsection 221 is less than or equal to the thickness of the optical adhesive layer 10 , and the thickness of the second subsection 222 is less than or equal to 25 μm.

There are various ways of disposing the decomposable adhesive layer 220 . For example, the decomposable adhesive layer 220 is formed by coating the array substrate 100 with adhesive. Coatings include decomposable materials.

There are many ways to set the decomposable material. For example, in some optional embodiments, the decomposable material includes, for example, a photodegradable material, and the decomposable adhesive layer 220 can be decomposed by irradiating the decomposable adhesive layer 220 with decomposing light. . The photolyzable material includes, for example, a photolyzable substance, such as a triazene-based polymer, so that the photolyzable material can be decomposed when exposed to light.

For example, the sizing material further includes a resin, and the photodegradable material is mixed in the resin so that a thin film can be formed when the coating material is coated on the array substrate 100 . The resin includes, for example, a diaminodiphenyl compound and a diamine, and a triazene-based polymer is mixed with the diaminodiphenyl compound and the diamine to obtain a colloidal substance, and the colloidal substance is coated on the array substrate 100 to form a photodegradable layer. 200.

When the sizing material is illuminated, the photolytic material contained in the sizing material can be decomposed, thereby reducing its thickness to form the first sub-section 221, so that the thickness of the first sub-section 221 is thin, and it is not easy to interact with other layers of the display panel. Interference at the location where the structure occurs.

When the sizing material includes resins and other materials that cannot be photolyzed, after the sizing material is illuminated, the sizing material in the display area AA can be removed by steps such as rinsing or cleaning. The decomposable adhesive layer 220 is located in the bending area PA.

Alternatively, in other optional embodiments, the decomposable adhesive layer 220 includes, for example, a pyrolyzable material, and the decomposable adhesive layer 220 is decomposed by heating the decomposable adhesive layer 220 when the temperature reaches the decomposable temperature.

In some other optional embodiments, the decomposable material includes, for example, a dissolvable material, and by coating a dissolving substance on the surface of the decomposable adhesive layer 220 , the decomposable adhesive layer 220 is dissolved and then decomposed.

In order to prevent the decomposable adhesive layer 220 located in the PA part of the bending area from being too thick, the thickness of the decomposable adhesive layer 220 located in the PA part of the bending area is within a preset thickness range, and the preset thickness range can be set in various ways. As long as the decomposable adhesive layer 220 located in the bending area PA portion is within a predetermined thickness range, the cover plate 500 will not be lifted up to cause the display panel to generate air bubbles. For example, the preset thickness range is 80 μm˜120 μm.

When the preset thickness ranges from 80 μm to 120 μm, the thickness of the decomposable adhesive layer 220 in the PA part of the bending area is within a reasonable range, so that the cover plate 500 can better fit the decomposable adhesive layer 220 . It can prevent the formation of a gap between the decomposable adhesive layer 220 and the cover plate 500 caused by the thin decomposable adhesive layer 220, thereby causing the display panel to generate air bubbles. At the same time, it can also prevent that the decomposable adhesive layer 220 located in the bending area PA is too thick to cause the cover plate 500 to lift up at the decomposable adhesive layer 220 , thereby causing the display panel to generate air bubbles.

For example, when the decomposable adhesive layer 220 is located in the bending area PA, the thickness of the decomposable adhesive layer 220 is 80 μm˜120 μm. When the decomposable adhesive layer 220 includes the first subsection 221 and the second subsection 22 , the thickness of the second subsection 222 is 80 μm˜120 μm.

In order to make the part of the display panel located in the bending area PA better able to bend, a preset distance is set between the decomposable adhesive layer 220 and the optical adhesive layer 210 . There are various ways to set the preset distance, as long as the bending of the display panel is not affected.

In some optional embodiments, the preset distance is 150 μm˜250 μm, that is, the distance between the decomposable adhesive layer 220 and the optical adhesive layer 210 in the first direction is 150 μm˜250 μm. It can prevent the preset distance between the decomposable adhesive layer 220 and the optical adhesive layer 210 from being too small, which affects the normal bending of the display panel, and at the same time prevent the distance between the decomposable adhesive layer 220 and the optical adhesive layer 210 from being too large, making the display Large gaps appear in the panel, reducing the quality of the display panel.

For example, when the decomposable adhesive layer 220 is located in the bending area PA, the distance between the decomposable adhesive layer 220 and the optical adhesive layer 210 in the first direction is 150 μm˜250 μm. When the decomposable adhesive layer 220 includes the first subsection 221 and the second subsection 222 , the distance between the first subsection 221 and the optical adhesive layer 210 in the first direction is 150 μm˜250 μm.

The second embodiment of the present invention further provides a display device, including the above-mentioned display panel. Since the display device of the embodiment of the present invention includes the above-mentioned display panel, the display device of the embodiment of the present invention has the beneficial effects of the above-mentioned display panel, which will not be repeated here.

The display device in the embodiment of the present invention includes, but is not limited to, a device with a display function, such as a mobile phone, a personal digital assistant (PDA), a tablet computer, an electronic paper book, a television, an access control, an intelligent fixed phone, and a console.

Please refer to FIG. 5 together. FIG. 5 is a flowchart of a method for forming a display panel according to a third embodiment of the present invention. The display panel is the display panel described in the above-mentioned first embodiment, and the display panel has a display area AA and a bending area PA successively distributed in the first direction. According to the molding of the display panel according to the third embodiment of the present invention shown in FIG. Methods include:

Step S501 : Coating glue on the array substrate, where the glue includes a decomposable material that can be decomposed when a preset condition is met.

As mentioned above, the sizing material may also include materials such as resin, which will not be repeated here.

Step S502: Decomposing the decomposable material coated on the display area to form a decomposable adhesive layer.

After the decomposition material is decomposed, the decomposable adhesive layer 220 can be located in the bending area PA, or the decomposable adhesive layer 220 can include a first subsection 221 located in the display area AA and a second subsection 222 located in the bending area PA .

Step S503 : coating an optical adhesive material on the array substrate to form an optical adhesive layer, and the optical adhesive layer is located in the display area.

Step S504 : covering the cover plate on the side of the decomposable adhesive layer and the optical adhesive layer away from the array substrate to form a display panel.

In the display panel molding method according to the third embodiment of the present invention, after the glue is applied on the array substrate 100, since the decomposable material in the glue can be decomposed when the preset conditions are met, it can be applied to the display panel 100. The decomposition of the decomposable material in the area can thin or eliminate the decomposable material coated on the display area AA, thereby forming the decomposable adhesive layer 220 . The positional interference between the decomposable adhesive layer 220 and other layer structures of the display panel is avoided, so that the cover plate 500 can be completely attached to the decomposable adhesive layer 220, thereby preventing the display panel from generating air bubbles.

The sequence of step S501 and step S503 is not limited. During the molding process of the display panel, the optical adhesive material may be coated on the array substrate 100 first to form the optical adhesive layer 210, and then the photolytic material may be coated to form a decomposable material. Alternatively, the decomposable adhesive layer 220 may be formed on the array substrate 100 first, and then the optical adhesive layer 210 may be formed. As long as the optical adhesive layer 210 is located in the display area AA, and the decomposable adhesive layer 220 is located in the bending area PA.

Please also refer to FIG. 6 . FIG. 6 is a flowchart of a method for forming a display panel according to another embodiment of the present invention. The preset condition is the lighting condition. When the decomposable material includes a photodecomposable material, there are many ways to set step S502. In some optional embodiments, step S502 further includes:

Step S5021 : covering a first mask with a first opening on the side of the decomposable adhesive layer away from the array substrate.

Wherein, the first opening corresponds to the setting of the glue in the display area AA.

Step S5022 : irradiating the adhesive with decomposing light to decompose the decomposable material located in the display area to form a decomposable adhesive layer.

In these optional embodiments, the first mask plate 600 is firstly covered on the decomposable adhesive layer 220, so that the first opening 610 of the first mask plate 600 corresponds to the decomposable material of the display area AA, and the An opening 610 corresponds to the setting of the paint in the display area AA; then the decomposed light is irradiated, so that the decomposed light can be irradiated to the decomposable material applied to the display area AA through the first opening 610, so that the decomposable material located in the display area AA can be thinned or removed The decomposable material forms the decomposable adhesive layer 220 to avoid the positional interference of the decomposable adhesive layer 220 and the touch screen 300 or the polarizer 400 to cause the touch screen 300 or the polarizer 400 to lift.

Please also refer to FIG. 7 . FIG. 7 is a flowchart of a method for forming a display panel according to another embodiment of the present invention.

In some optional embodiments, after step S502, the method for forming the display panel further includes step S505: decomposing the decomposable adhesive layer coated on the bending area, so that the thickness of the decomposable adhesive layer is within a preset thickness range .

The step of decomposing the decomposable adhesive layer 220 coated on the bending area PA so that the thickness of the decomposable adhesive layer 220 is within a predetermined thickness range includes, for example: covering a side of the decomposable adhesive layer 220 away from the array substrate 100 with a The second mask 700 of the second opening 710 allows the decomposable adhesive layer 220 to be exposed by the second opening 710; the decomposable adhesive layer 220 is irradiated with decomposing light, so that at least part of the decomposable adhesive layer on the side away from the array substrate 100 is irradiated The layer 220 is decomposed, so that the thickness of the decomposable adhesive layer 220 is within a predetermined thickness range.

In these optional embodiments, the second mask plate 700 is covered on the decomposable adhesive layer 220, and the second opening 710 of the second mask plate 700 corresponds to the bending area PA, so that the decomposable adhesive layer 220 is formed by the first Two openings 710 are exposed. The decomposing light can directly irradiate the decomposable adhesive layer 220, so that at least part of the decomposable adhesive layer 220 can be decomposed, thereby reducing the thickness of the decomposable adhesive layer 220, so that the thickness of the decomposable adhesive layer 220 is within a preset thickness range. It is avoided that because the thickness of the decomposable adhesive layer 220 is too thick, the cover plate 500 cannot be completely adhered to the decomposable adhesive layer 220 , which may cause the display panel to generate air bubbles. The preset thickness is, for example, 80 μm˜120 μm.

There are various ways to decompose the thickness of the decomposable adhesive layer 220 within the preset thickness range, for example, by controlling the irradiation time of the decomposing light, so that the thickness of the decomposable adhesive layer 220 is within the preset range. Alternatively, by controlling the irradiation intensity of the decomposing light, the thickness of the decomposable adhesive layer 220 is within a preset range.

There are many types of dissociation light. For example, the dissociation light is a pulsed laser, and the decomposed material is decomposed by the irradiation of the pulsed laser.

There are various ways to set the wavelength of the decomposed light. For example, the wavelength of the decomposed light is greater than or equal to 400 nm. Preferably, the wavelength of the decomposed light is 500 nm to 550 nm. By reasonably controlling the wavelength of the pulsed laser, damage to other components of the display panel caused by the pulsed laser can be avoided.

Taking the display panel shown in FIG. 1 and FIG. 2 as an example, please refer to FIG. 8a to FIG. 8h together to describe the molding method of the display panel according to the third embodiment of the present invention:

Step 1: Referring to FIG. 8a, an adhesive layer 200 is coated on the array substrate 100. The adhesive layer 200 includes an optical adhesive layer 210 located in the display area AA and a decomposable adhesive layer 220 located approximately in the bending area PA. The decomposable adhesive layer 220 is formed by coating with a sizing material. Due to the limitation of the coating process, when applying the sizing material, the sizing material is likely to overflow from the bending area PA to the display area AA. The sizing compound is, for example, the aforementioned sizing compound containing a decomposable material and a resin.

Step 2: Referring to FIG. 8b, cover the first mask plate 600 on the side of the decomposable adhesive layer 220 away from the array substrate 100, the first mask plate 600 has a first opening 610, and the first opening 610 corresponds to the display area The decomposable adhesive layer 220 of AA is provided.

The size of the first opening 610 is not limited. The first opening 610 may be located in the entire display area AA, or the first opening 610 may extend from the bending area PA toward the edge of the display area AA in a direction away from the bending area PA by a preset width. . As long as the decomposable adhesive layer 220 located in the display area AA can be exposed through the first opening 610 .

Step 3: Referring to FIG. 8c, the decomposable adhesive layer 220 is irradiated by decomposing light. Due to the shielding effect of the first mask plate 600 , the decomposing light only decomposes the decomposable adhesive layer 220 exposed by the first opening 610 , thereby decomposing the decomposable adhesive layer 220 located in the display area AA. In FIG. 8c , the irradiation direction of the decomposed light is indicated by an arrow, and the arrow does not constitute a limitation on the structure of the display panel according to the embodiment of the present invention, but is only used to illustrate the decomposed light.

After step 3, if the sizing material includes non-decomposable materials such as resin, after the decomposable material included in the decomposable adhesive layer 220 is decomposed by the decomposing light, the thickness of the decomposing adhesive layer 220 located in the display area AA is less than or equal to the optical adhesive layer The thickness of 210 , that is, the decomposable adhesive layer 220 includes a first subsection 221 and a second subsection 222 . However, when the thickness of the decomposable adhesive layer 220 in the display area AA is greater than or equal to the thickness of the optical adhesive layer 210, cleaning steps such as scouring can be performed to eliminate the adhesive in the display area AA, that is, the decomposable adhesive layer 220 can be removed. in the bending area PA.

Step 4: Referring to FIG. 8d, the irradiation of the decomposable adhesive layer 220 in the display area AA is completed, and the first mask plate 600 is removed.

At this time, when the thickness of the decomposable adhesive layer 220 is within the preset thickness range, the decomposing step can be ended, and the touch screen 300 , the polarizer 400 and the cover plate 500 are directly covered on the adhesive layer 200 in sequence to form a display panel. If the thickness of the decomposable adhesive layer 220 is thick, and the thickness of the decomposable adhesive layer 220 exceeds the thickness threshold, the photolysis of the decomposable adhesive layer 220 is continued.

Step 5: Referring to FIG. 8e , cover the second mask 700 with the second opening 710 on the side of the decomposable adhesive layer 220 away from the array substrate 100 , so that the decomposable adhesive layer 220 is exposed by the second opening 710 . At this time, the second opening 710 is disposed corresponding to the decomposable adhesive layer 220 in the bending area PA.

Step 6: Referring to FIG. 8f, the decomposable adhesive layer 220 is irradiated with decomposing light, so that at least part of the decomposable adhesive layer 220 on the side away from the array substrate 100 is decomposed, and the thickness of the decomposable adhesive layer 220 is reduced so that the decomposable adhesive layer 220 can be decomposed. The thickness of the adhesive layer 220 is within a predetermined thickness range. As described above, in FIG. 8f , the irradiation direction of the decomposed light is indicated by arrows, and the arrows do not constitute a limitation on the structure of the display panel according to the embodiment of the present invention, but are only used to illustrate the decomposed light.

Step 7, referring to FIG. 8g, when the thickness of the decomposable adhesive layer 220 is within the predetermined thickness range, the irradiation is stopped, and the second mask plate 700 is removed.

Step 8, referring to FIG. 8h, cover the touch screen 300, the polarizer 400 and the cover plate 500 on the adhesive layer 200 in sequence to form a display panel.

According to the molding method of the display panel according to the third embodiment of the present invention, since the adhesive layer 200 includes the decomposable adhesive layer 220 and the decomposable adhesive layer 220 includes decomposable materials, decomposing the decomposable adhesive layer 220 can make the decomposable adhesive layer 220 decomposable. The thickness or coating range of the layer 220 is within a preset range, preventing the decomposable adhesive layer 220 from interfering with the touch screen 300 and/or the polarizer 400, and preventing the touch screen 300 and/or the polarizer 400 from lifting and causing bubbles to appear on the display panel . At the same time, decomposing the decomposable adhesive layer 220 in the bending area PA can also make the thickness of the decomposable adhesive layer 220 within the preset thickness range, so as to prevent the decomposable adhesive layer 220 from being too thick and causing the cover plate 500 to not fit tightly. Air bubbles appear on the display panel.

While the application has been described with reference to the preferred embodiments, various modifications may be made and equivalents may be substituted for parts thereof without departing from the scope of the application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (10)

1. A display panel having a display area and a bend area successively distributed in a first direction, the display panel comprising:

an array substrate;

the glue layer is arranged on the array substrate and comprises an optical glue layer arranged in the display area and a decomposable glue layer at least partially arranged in the bending area, and the decomposable glue layer comprises a decomposable material capable of being decomposed when a preset condition is met;

the cover plate covers one side of the adhesive layer, which deviates from the array substrate.

2. The display panel of claim 1, wherein the decomposable material comprises at least one of a photolyzable material, a pyrolyzable material, or a dissolvable material;

preferably, the preset condition is a lighting condition, and the decomposable material comprises a photolyzable material;

preferably, the decomposable material comprises a triazine-based polymer.

3. The display panel according to claim 1,

the decomposable adhesive layer is positioned in the bending area;

preferably, the thickness of the decomposable adhesive layer is 80-120 μm;

preferably, the distance between the decomposable adhesive layer and the optical adhesive layer in the first direction is 150 to 250 μm.

4. The display panel according to claim 1, wherein the decomposable adhesive layer comprises a first subsection at the display area and a second subsection at the bending area, the first subsection and the second subsection are distributed in succession in the first direction, and the thickness of the first subsection is less than or equal to that of the optical adhesive layer;

preferably, the thickness of the second part is 80 to 120 μm;

preferably, the thickness of the first subsection is less than or equal to 25 μm;

preferably, the distance between the first branches and the optical adhesive layer in the first direction is 150 to 250 μm.

5. A display device characterized by comprising the display panel according to any one of claims 1 to 4.

6. A method for forming a display panel, wherein the display panel has a display area and a bending area distributed in succession in a first direction, the method comprising:

coating a sizing material on the array substrate, wherein the sizing material comprises a decomposable material which can be decomposed when a preset condition is met;

decomposing the decomposable material in the display area to form a decomposable glue layer;

coating an optical adhesive material on the array substrate to form an optical adhesive layer positioned in the display area;

and covering a cover plate on one side of the decomposable adhesive layer and the optical adhesive layer, which deviates from the array substrate, so as to form the display panel.

7. The method of claim 6, wherein the predetermined condition is a lighting condition, the decomposable material comprises a photolyzable material, and the step of decomposing the decomposable material in the display region to form a decomposable adhesive layer comprises:

covering a first mask plate with a first opening on one side of the glue stock, which is far away from the array substrate, wherein the first opening is arranged corresponding to the decomposable material in the display area;

and irradiating the glue material by adopting decomposition light to decompose the decomposable material positioned in the display area to form a decomposable glue layer.

8. The method of claim 6, wherein the predetermined condition is a lighting condition, the decomposable material comprises a photolyzable material, and after the step of decomposing the decomposable material in the display region to form a decomposable glue layer, the method further comprises:

covering a second mask plate with a second opening on one side of the decomposable adhesive layer, which is far away from the array substrate, so that the decomposable adhesive layer is exposed from the second opening;

and irradiating the decomposable adhesive layer by using decomposed light so as to decompose at least part of the decomposable adhesive layer deviating from the side of the array substrate, so that the thickness of the decomposable adhesive layer is within a preset thickness range.

9. The method of claim 7 or 8, wherein the decomposed light is pulsed laser light.

10. The method according to claim 7 or 8,

the wavelength of the decomposed light is greater than or equal to 400 nm;

preferably, the wavelength of the decomposed light is 500nm to 550 nm.

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