CN115359722A - Display panel and preparation method thereof - Google Patents
Display panel and preparation method thereof Download PDFInfo
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- CN115359722A CN115359722A CN202210932083.2A CN202210932083A CN115359722A CN 115359722 A CN115359722 A CN 115359722A CN 202210932083 A CN202210932083 A CN 202210932083A CN 115359722 A CN115359722 A CN 115359722A
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- light
- display module
- adhesive
- cover plate
- display panel
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- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000853 adhesive Substances 0.000 claims abstract description 99
- 230000001070 adhesive effect Effects 0.000 claims abstract description 99
- 239000003292 glue Substances 0.000 claims abstract description 66
- 230000008093 supporting effect Effects 0.000 claims abstract description 53
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000005452 bending Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 230000001678 irradiating effect Effects 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000000084 colloidal system Substances 0.000 abstract description 41
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000001723 curing Methods 0.000 description 22
- 229920002120 photoresistant polymer Polymers 0.000 description 8
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
- G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
Abstract
The application discloses a display panel and a preparation method thereof. The display panel comprises a display module, a cover plate and adhesive. The bonding glue is arranged on the cover plate and the display module, part of glue in the bonding glue is cured in advance to form a supporting structure, the supporting structure is supported between the cover plate and the display module to form a cavity with uniform thickness between the cover plate and the display module, and the rest glue is filled in the cavity and cured. This application is through right the partial colloid of bonding glue solidifies in advance for the colloid of solidifying in advance constitutes bearing structure, bearing structure supports between display module assembly and apron, can fully separate display module assembly and apron, and makes the interval between the two keep at the settlement within range, thereby through adjustment bearing structure's formation position and formation quantity, can ensure that the optional position between display module assembly and the apron all keeps even interval, ensure that the thickness of the colloid of not being solidified between display module assembly and apron is even.
Description
Technical Field
The application relates to the technical field of display devices, in particular to a display panel and a preparation method thereof.
Background
With the development of communication technology, products with display screens, such as smart phones, are becoming more and more popular. Taking an OLED (Organic Light-Emitting Diode) flexible display as an example, the current OLED flexible display mainly uses an OCA optical adhesive to bond a cover plate and a display module, and the thickness of the optical adhesive is generally between 50 to 200 um. But when pasting apron and display module assembly, because the atress is uneven, or when flexible display screen is the curved surface screen, the condition of attenuation can appear at the OCA edge, leads to apron and display module assembly interval inhomogeneous and produce mutual interference easily, and leads to the appearance of display screen not good, produces the quality bad.
Disclosure of Invention
The embodiment of the application provides a display panel and a preparation method thereof, and aims to solve the problem that when an existing cover plate and a display module are bonded through bonding glue, the bonding glue is not uniformly distributed, so that the quality of the display panel is poor.
An embodiment of the present application provides a display panel, including:
a display module;
the cover plate is arranged on one side of the display module; and the number of the first and second groups,
the bonding glue is arranged between the cover plate and the display module, part of the glue in the bonding glue is used for being cured in advance to form a supporting structure, the supporting structure is supported between the cover plate and the display module to form a cavity with uniform thickness between the cover plate and the display module, and the rest glue is filled in the cavity and is cured.
According to an embodiment of the application, bearing structure includes first brace rod and second brace rod, the extending direction of first brace rod with the extending direction of second brace rod is the cross arrangement.
According to an embodiment of the application, the first supporting ribs extend along a first direction, a plurality of the first supporting ribs are arranged side by side at intervals along a second direction, the second supporting ribs extend along the second direction, a plurality of the second supporting ribs are arranged side by side at intervals along the first direction, the first direction and the second direction are arranged in a crossed manner, and the first supporting ribs and the second supporting ribs jointly form a grid-shaped structure;
wherein at least one mesh of the mesh-like structure defines the cavity.
According to an embodiment of the present application, the bonding glue is an ultraviolet curing glue.
According to an embodiment of the application, the support structure is disposed near an edge of the display panel.
According to an embodiment of the present application, the display panel is a curved display panel, the display panel defines a bending region, and the support structure is at least formed in the bending region.
In addition, to achieve the above object, the present application also provides a method for manufacturing a display panel as described above, including:
providing a display module, and coating adhesive glue on one side of the display module;
locally curing the bonding glue to obtain a support structure;
and providing a cover plate, wherein the cover plate is covered on one side of the support structure back to the display module, and the bonding glue is integrally cured, so that the bonding glue is connected with the display module and the cover plate.
According to an embodiment of the application, the bonding glue is an ultraviolet curing glue;
the step of locally curing the bonding glue to obtain a support structure comprises:
and providing a photomask with a light transmission area locally, and irradiating the bonding adhesive with ultraviolet light through the photomask so that the ultraviolet light passes through the light transmission area and is cured on the bonding adhesive to form a support structure.
According to an embodiment of the present application, a photomask with a light-transmitting area locally is provided, and the step of irradiating the bonding glue with ultraviolet light through the photomask to allow ultraviolet light to pass through the light-transmitting area and solidify on the bonding glue to form a support structure includes:
providing a first photomask with a first light-transmitting area locally, and performing ultraviolet irradiation on the adhesive through the first photomask so that ultraviolet light can penetrate through the first light-transmitting area and be cured on the adhesive to form a first supporting rib;
providing a second photomask with a second light-transmitting area locally, and performing ultraviolet irradiation on the adhesive through the second photomask so that ultraviolet light can penetrate through the second light-transmitting area and be cured on the adhesive to form second support ribs;
the extending direction of the first light-transmitting area and the extending direction of the second light-transmitting area are arranged in a crossed mode.
According to an embodiment of the application, the light shield is set to one, the light transmission area includes first light transmission area and second light transmission area, the extending direction in first light transmission area with the extending direction in second light transmission area is cross arrangement, first light transmission area with second light transmission area is used for forming first brace rod and second brace rod respectively.
The beneficial effects of the embodiment of the application are as follows: before the bonding glue is integrally cured, part of the glue of the bonding glue is pre-cured, so that the pre-cured glue forms a support structure, the support structure is supported between a display module and a cover plate, the display module and the cover plate can be fully spaced, and the distance between the display module and the cover plate is kept within a set range, so that the uniform distance between any part of the display module and the cover plate can be ensured by adjusting the forming positions and the forming quantity of the support structure, sufficient and appropriate space is formed for the uncured glue to flow, the uniform thickness of the uncured glue when the uncured glue is distributed between the display module and the cover plate can be ensured, the flow of the uncured glue can be retarded to a certain extent, the uncured glue is prevented from overflowing outwards, sufficient time is reserved for the uncured glue to uniformly diffuse, and defects such as bubbles generated in the glue are avoided; after the colloid that is not solidified distributes between display module assembly and apron in place, solidify the bonding glue again, reach the purpose that bonding glue connects display module assembly and apron.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic longitudinal sectional view of a display panel provided in an embodiment of the present application after being pre-cured;
FIG. 2 is a schematic top view of the display module and the bonding paste of FIG. 1 after pre-curing;
fig. 3 is a schematic flow chart illustrating a method for manufacturing a display panel according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of the display panel in FIG. 3 when step S200 is performed;
FIG. 5 is a schematic diagram of a first embodiment of a mask according to the present disclosure;
FIG. 6 is a schematic diagram of the second mask shown in FIG. 5;
fig. 7 is a schematic structural diagram of a mask according to a second embodiment of the present disclosure.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all 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.
Referring to fig. 1 to fig. 2, an embodiment of the present disclosure provides a display panel 1, where the display panel 1 includes a display module 110, a cover plate 120, and an adhesive 130. The cover plate 120 is disposed on one side of the display module 110; the adhesive 130 is disposed between the cover plate 120 and the display module 110, a part of the adhesive in the adhesive 130 is used to form a support structure 131 through pre-curing, the support structure 131 is supported between the cover plate 120 and the display module 110 to form a cavity with uniform thickness between the cover plate 120 and the display module 110, and the rest of the adhesive is filled in the cavity and cured.
The beneficial effects of the embodiment of the application are as follows: before the adhesive 130 is integrally cured, part of the adhesive 130 is pre-cured, so that the pre-cured adhesive forms a support structure 131, the support structure 131 is supported between the display module 110 and the cover plate 120, the display module 110 and the cover plate 120 can be sufficiently spaced, and the distance between the display module 110 and the cover plate 120 is kept within a set range, so that by adjusting the forming position and the forming number of the support structure 131, a uniform distance can be kept between any part of the display module 110 and the cover plate 120, a sufficient and appropriate space is formed for the uncured adhesive in the adhesive 130 to flow, the uniform thickness of the uncured adhesive when the uncured adhesive is distributed between the display module 110 and the cover plate 120 can be ensured, the flow of the uncured adhesive can be retarded to a certain extent, the uncured adhesive is prevented from overflowing outwards, sufficient time is reserved for the uncured adhesive to uniformly diffuse, and the defects of bubbles and the like generated in the adhesive are avoided; after the uncured adhesive is distributed in place between the display module 110 and the cover plate 120, the adhesive 130 is cured, so that the purpose that the adhesive 130 connects the display module 110 and the cover plate 120 is achieved.
In the present application, the display module 110 has a display side, and the cover plate 120 is covered on the display side by the adhesive 130. The specific representation of the display module 110 and the cover plate 120 is not limited in this application.
It can be understood that the present application does not limit the arrangement order of the display module 110, the cover plate 120 and the adhesive 130. In an embodiment, after the display module 110 is molded, the display side of the display module 110 is coated with the adhesive 130, and then the cover plate 120 is covered on the side of the adhesive 130 opposite to the display module 110. Or in an embodiment, after the cover plate 120 is molded, the adhesive 130 is coated on one side of the cover plate 120, and then the cover plate 120 with the adhesive 130 is covered on the display side of the display module 110. Or in an embodiment, after the display module 110 and the cover plate 120 are assembled, a through hole is reserved at a connection position of the display module 110 and the cover plate 120, and the connection position of the display module 110 and the cover plate 120 is filled with the adhesive 130 through the through hole.
The present application is not limited to the specific representation of the adhesive 130. The adhesive glue 130 can be liquid glue, semi-solid glue, etc. made of any suitable material; the adhesive 130 may be applied to the entire area where the display module 110 and the cover plate 120 are connected, or may be applied locally, for example, in the circumferential direction of the connection. The adhesive 130 may be set to have a desired thickness according to actual requirements.
The application does not limit the curing manner of the adhesive 130. The adhesive 130 may be cured in a natural state or may be cured under a specific condition. The specific conditions may be temperature, airflow, light, pressure, etc. Specifically, for example, the adhesive 130 may be an ultraviolet curing adhesive, that is, an adhesive that can be cured under the irradiation of ultraviolet light UV.
For ease of understanding, the adhesive 130 is defined to include a first gel 130a and a second gel 130b, wherein the first gel 130a is a gel that is pre-cured to form the support structure 131, and the second gel 130b is a fluid that is flowable when the rest is uncured. The first colloid 130a and the second colloid 130b may be identical in material, size, curing method, and the like, or may be different. In an embodiment, the first sealant 130a and the second sealant 130b may be filled between the cover plate 120 and the display module 110 at the same time, and then the first sealant 130a is pre-cured by, for example, partial curing. Or in an embodiment, the first adhesive 130a may be filled between the cover plate 120 and the display module 110, and the second adhesive 130b may be refilled after the first adhesive 130a is cured in advance.
In an embodiment of the present disclosure, the first colloid 130a and the second colloid 130b are made of ultraviolet curing glue, and the first colloid 130a and the second colloid 130b are filled between the display module 110 and the cover plate 120 at the same time, which is helpful for simplifying the curing operation of the first colloid 130a and the second colloid 130b.
It is understood that the supporting structure 131 is supported between the cover plate 120 and the display module 110 after the cover plate 120 is assembled with the display module 110. That is, the supporting structure 131 protrudes from one of the cover plate 120 and the display module 110 and extends toward the other to be connected thereto. Thus, the supporting structure 131 supports the cover plate 120 and the display module 110, and maintains the distance between the cover plate 120 and the display module 110 within a predetermined range, which is helpful for forming a cavity with uniform and appropriate thickness between the cover plate 120 and the display module 110, and the second glue body 130b is filled in the cavity, which is not only free from local thinning of the second glue body 130b caused by the weight of the cover plate 120 or other stress, but also has enough time to fully spread the second glue body 130b, which is helpful for the coating area of the second glue body 130b to be uniform and uniform in thickness.
If it is defined that the total thickness of the adhesive 130 needs to satisfy a after the display module 110 and the cover plate 120 are attached by the adhesive 130, it should be noted that, the application does not limit that the height of the supporting structure 131 formed after the first adhesive 130a is cured in advance to be a, and in practical application, for example, when the adhesive 130 has a certain elastic deformation capability after being cured, the height of the supporting structure 131 may be slightly higher than a, so that the formed cavity is relatively larger and can be completely filled with the second adhesive 130 b; or when the adhesive 130 is coated on the display module 110 before the cover plate 120 is covered, the height of the support structure 131 may be slightly lower than a, which not only can ensure that the cover plate 120 and the display module 110 are spread, but also when the cavity is filled with the second adhesive 130b, a part of the adhesive can extend to the free end of the support structure 131, so that after the second adhesive 130b is cured, the free end of the support structure 131 can be fastened with the cover plate 120 through the part of the adhesive, thereby increasing the connection strength between the cover plate 120 and the display module 110.
In addition, after the second glue body 130b is fully filled in the cavity, the adhesive glue 130, especially the second glue body 130b, needs to be integrally cured. Based on this, in an embodiment, by adjusting the curing range or changing the shape of the structure such as the mask, the support structure can form an outer ring and be cured to form a cylindrical structure, and the colloid in the cylindrical structure is not cured. After the second adhesive 130b is fully filled in the cavity, the adhesive in the cylindrical structure is cured together with the second adhesive 130b, thereby enhancing the connection strength between the supporting structure and the cover plate 120 or the display module 110.
Of course, by changing the material of the first colloid 130a, the first colloid 130a may be set to be incompletely cured when being cured in advance to form the supporting structure 131, and then after the second colloid 130b is fully filled in the cavity, the first colloid 130a and the second colloid 130b are completely cured together.
It should be noted that, when the materials, the sizes, and the like of the first colloid 130a and the second colloid 130b are the same, the appearance states of the integrally cured first colloid 130a and the second colloid 130b are basically the same and are connected into a whole; when the materials, sizes, and the like of the first colloid 130a and the second colloid 130b are different, the appearances of the integrally cured first colloid 130a and the second colloid 130b are different, so that the first colloid 130a (i.e., the supporting structure 131) and the second colloid 130b can be easily distinguished to form two structures.
Further, the supporting structures 131 may be disposed in a multi-point manner and distributed in each region between the cover plate 120 and the display module 110; alternatively, the support structure 131 may be provided in a column shape, a long strip shape, or the like. In an embodiment, the supporting structure 131 includes a first supporting rib 131a and a second supporting rib 131b, and an extending direction of the first supporting rib 131a and an extending direction of the second supporting rib 131b are arranged to intersect. For convenience of understanding, it is defined that the first support rib 131a extends along a first direction, and the second support rib 131b extends along a second direction, and the first direction and the second direction are crossed. It should be noted that the angle formed by the crossing arrangement may be between 0 ° and 180 °, but does not include 0 ° and 180 °. The first supporting rib 131a and the second supporting rib 131b arranged in a crossed manner may form an approximately triangular supporting surface together, which is helpful for forming a better supporting effect between the cover plate 120 and the display module 110. In addition, the first and second supporting ribs 131a and 131b disposed in a cross manner may form barriers for at least two directions (i.e., the first and second directions), which helps to limit the flow path of the second colloid 130b. Especially, when the first supporting rib 131a and the second supporting rib 131b are disposed at least at two edges of the display panel 1, the second glue 130b can be prevented from overflowing from between the cover plate 120 and the display module 110.
The shape, size, distribution area, and the like of the first support rib 131a and the second support rib 131b are not limited.
Furthermore, in an embodiment, the first supporting rib 131a and the second supporting rib 131b may be respectively provided in a plurality of numbers, specifically, the first supporting rib 131a extends along a first direction and is arranged in a plurality of numbers along a second direction at intervals side by side, the second supporting rib 131b extends along the second direction and is arranged in a plurality of numbers along the first direction at intervals side by side, the first direction and the second direction are arranged in a cross manner, and the first supporting rib 131a and the second supporting rib 131b together form a grid structure; wherein at least one mesh of the grid-like structure defines the cavity. It can be understood that the cavities defined by the respective grids, which cover the respective regions between the cover plate 120 and the display module 110, facilitate uniform filling of the second gel 130b in the respective regions. The shape of the grid is not limited, for example, as shown in fig. 2, the grid may be rectangular. The staggered arrangement of the plurality of first support ribs 131a and the plurality of second support ribs 131b contributes to increase of the support area and the range of the support region, and further contributes to formation of the cavity having a uniform thickness everywhere.
Based on any of the above embodiments, when the support structure 131 is locally disposed on the display panel 1, the support structure 131 may be disposed closer to the edge of the display panel 1 than to the middle of the display panel 1. Therefore, the stress concentration formed at the display panel 1 can be prevented from pressing the cover plate 120 and the display module 110 to reduce the distance between the cover plate and the display module, and meanwhile, the supporting structure 131 can block the second colloid 130b to prevent the second colloid 130b from overflowing from the edge of the display panel 1.
Based on any of the above embodiments, when the display panel 1 is a curved display panel 1, that is, when the OLED flexible panel is used, the display panel 1 defines the bending region 11, the bending region 11 is generally close to the edge of the display panel 1, and under the action of stress, the adhesive 130 is easily extruded along the bending region 11, so that the thickness of the adhesive 130 at the position is reduced. In the present application, the supporting structure 131 is at least formed in the bending region 11, and can support the cover plate 120 and the display module 110 of the bending region 11, so as to specifically solve the problem that the thickness of the adhesive 130 at the edge of the OLED flexible panel is easy to be thinned.
In addition, based on the display panel 1 according to any of the embodiments, the present application further provides a method for manufacturing the display panel 1, and please refer to fig. 3 to fig. 7, and the method for manufacturing the display panel 1 will be described below with reference to the main drawings.
Referring to fig. 3, the method for manufacturing the display panel 1 includes the following steps:
step S100: providing a display module 110, and coating adhesive 130 on one side of the display module 110;
as described above, the adhesive 130 may be coated on the cover plate 120 side, or may be poured after the display module 110 and the cover plate 120 are assembled, and in the present embodiment, the adhesive 130 is mainly coated on the display module 110 side. The adhesive 130 is coated on the display side of the display module 110 according to a set area and an adhesive amount, and at this time, the first adhesive 130a and the second adhesive 130b are coated on the display side of the display module 110.
Step S200: locally curing the bonding glue 130 to obtain a support structure 131;
in this embodiment, the adhesive 130 is locally cured, that is, the first adhesive body 130a is cured in a targeted manner.
Specifically, referring to fig. 4, when the adhesive 130, particularly the first adhesive 130a, is uv-cured, the step S200: the partial curing of the glue 130 to obtain the support structure 131 comprises:
step S210: providing a photomask 2 partially provided with a light-transmitting area 220, and irradiating the bonding glue 130 with ultraviolet light through the photomask 2, so that the ultraviolet light passes through the light-transmitting area 220 and is cured on the bonding glue 130 to form a support structure 131.
It is understood that the mask 2 includes a body, and a light-transmitting region 220 and a light-shielding region 210 defined on the body. The transparent region 220 is also an area through which the ultraviolet light passes, and the light-shielding region 210 is also an area capable of blocking at least part of the ultraviolet light. The ultraviolet curing photoresist can be divided into a positive photoresist and a negative photoresist according to the exposure and development mechanisms of the ultraviolet curing photoresist. When the first colloid 130a is a positive photoresist, the shape of the light-transmitting region 220 corresponds to the shape of the support structure 131; on the contrary, when the first colloid 130a is a negative photoresist, the shape of the light-shielding region 210 is adapted to the shape of the support structure 131. For convenience of understanding, the embodiment shown in the figures of the present application is described by taking the first colloid 130a as a positive photoresist as an example, and based on this, the shape and size of the light-transmitting region 220 can be specifically configured according to the shape and size of the support structure 131 as required.
However, when the first colloid 130a is a negative photoresist, it is still within the scope of the present application to adjust the suitability of the following embodiments.
Further, in view of the above explanation about the specific structure of the supporting structure 131, in an embodiment, when the supporting structure 131 includes a first supporting rib 131a and a second supporting rib 131b, and the first supporting rib 131a extends along a first direction and is arranged in a plurality of rows along a second direction at intervals, the second supporting rib 131b extends along the second direction and is arranged in a plurality of rows along the first direction at intervals, the first direction and the second direction are arranged in a cross manner, and the first supporting rib 131a and the second supporting rib 131b together form a grid structure.
Based on this, referring to fig. 5 and fig. 6, in the first embodiment, the step S210: providing a mask 2 partially provided with a light-transmitting area 220, and performing ultraviolet irradiation on the adhesive 130 through the mask 2, so that ultraviolet light passes through the light-transmitting area 220 and is cured on the adhesive 130 to form a support structure 131 specifically includes:
step S211: providing a first photomask 21 partially provided with a first light-transmitting area 221, and performing ultraviolet irradiation on the adhesive 130 through the first photomask 21 so that ultraviolet light passes through the first light-transmitting area 221 and is cured on the adhesive 130 to form a first support rib 131a;
step S212: providing a second light shield 22 with a second light-transmitting area 222 locally, and performing ultraviolet irradiation on the adhesive 130 through the second light shield 22 so that ultraviolet light passes through the second light-transmitting area 222 and is cured on the adhesive 130 to form a second support rib 131b;
the extending direction of the first light-transmitting region 221 and the extending direction of the second light-transmitting region 222 are arranged in a cross manner.
In this embodiment, the sequence of the step S211 and the step S212 may be replaced according to actual needs. Referring to fig. 5 and 6, on the first mask 21, a plurality of first light-transmitting regions 221 may be disposed, each first light-transmitting region 221 extends along the first direction, and the plurality of first light-transmitting regions 221 are arranged side by side at intervals along the second direction, so that the plurality of first light-transmitting regions 221 are in a grid shape. The energy of the ultraviolet light can be adjusted by adjusting the energy parameters of the ultraviolet light, for example, by adjusting parameters such as the irradiation time of the ultraviolet light, the power of the light source, and the distance between the light source and the display panel 1, and the portions of the first colloid 130a corresponding to the plurality of first light-transmitting regions 221 are cured to form the first support ribs 131a. On the second mask 22, a plurality of second light-transmitting areas 222 may be disposed, each second light-transmitting area 222 extends along the second direction, and the plurality of second light-transmitting areas 222 are arranged side by side at intervals along the first direction, so that the plurality of second light-transmitting areas 222 are in a grid shape. Similarly, the adjustment of the energy of the ultraviolet light can be realized by adjusting the energy parameters of the ultraviolet light, for example, by adjusting the irradiation time of the ultraviolet light, the power of the light source, the distance between the light source and the display panel 1, and the portions of the first colloid 130a corresponding to the plurality of second light-transmitting areas 222 are cured to form the second support ribs 131b. Of course, the energy of the ultraviolet light curing to form the first support rib 131a and the energy of the ultraviolet light curing to form the second support rib 131b may be the same or different.
It should be noted that, when the shapes and sizes of the bodies of the first mask 21 and the second mask 22 are substantially the same, and the shapes, sizes and arrangements of the first light-transmitting region 221 and the second light-transmitting region 222 are substantially the same, the first mask 21 and the second mask 22 can be obtained by rotating the same mask 2 by a set angle, which helps to reduce the number of masks 2. For example, in fig. 5 and fig. 6, when the first mask 21 and the second mask 22 are substantially rectangular with the same shape and size, and the first direction and the second direction are two diagonal directions of the rectangle, respectively, the second mask 22 is equivalent to the first mask 21 and rotates 180 °, and the first support rib 131a and the second support rib 131b can be formed in sequence directly by the same mask 2 structure.
In addition, referring to fig. 7, in the second embodiment, the mask 2 is set to be one, and for distinction, the mask 2 is a third mask 23. The light-transmitting regions 220 of the third mask 23 include first light-transmitting regions 221 and second light-transmitting regions 222, and similar to the first light-transmitting regions 221 and the second light-transmitting regions 222 in the first embodiment, the first light-transmitting regions 221 extend along a first direction, and a plurality of light-transmitting regions are arranged side by side and at intervals along a second direction; the second light-transmitting area 222 extends along the second direction, and is arranged in a plurality of rows along the first direction at intervals side by side, so that the extending direction of the first light-transmitting area 221 and the extending direction of the second light-transmitting area 222 are arranged in a cross manner, and the first light-transmitting area 221 and the second light-transmitting area 222 are used for forming the first support rib 131a and the second support rib 131b respectively. This contributes to reducing the number of masks 2 to be arranged.
After the first colloid 130a is pre-cured, step S300: providing a cover plate 120, wherein the cover plate 120 covers one side of the support structure 131 opposite to the display module 110, and integrally curing the adhesive 130, so that the adhesive 130 connects the display module 110 and the cover plate 120.
In this embodiment, the cover plate 120 covers the side of the supporting structure 131 opposite to the display module 110, and is supported by the supporting structure 131, a cavity with uniform thickness is defined between the cover plate 120 and the display module 110, and a sufficient safety distance is reserved for the second colloid 130b to fully flow in each grid in the cavity, but due to the separation of the grids, the second colloid does not overflow from the grids, so that the thickness reduction of the colloid in the partial region of the adhesive 130 can be prevented, and the overflow of the adhesive 130 can be avoided.
Of course, as mentioned above, the cover plate 120 and the display module 110 may be assembled first, and then the adhesive 130 is poured between the cover plate and the display module, and then the support structure 131 is formed by partially curing the adhesive 130 by referring to the above steps, and then the entire curing is performed, so as to ensure that the thickness of the adhesive 130 is not reduced before the support structure 131 is formed.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.
The display panel and the manufacturing method thereof provided by the embodiments of the present application are described in detail above, and the principle and the implementation manner of the present application are explained by applying specific examples herein, and the description of the embodiments above is only used to help understanding the technical scheme and the core idea of the present application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A display panel, comprising:
a display module;
the cover plate is arranged on one side of the display module; and (c) a second step of,
the bonding glue is arranged between the cover plate and the display module, part of the glue in the bonding glue is used for being cured in advance to form a supporting structure, the supporting structure is supported between the cover plate and the display module to form a cavity with uniform thickness between the cover plate and the display module, and the rest glue is filled in the cavity and is cured.
2. The display panel according to claim 1, wherein the support structure comprises a first support rib and a second support rib, and an extending direction of the first support rib and an extending direction of the second support rib are arranged to intersect.
3. The display panel according to claim 2, wherein the first support rib extends along a first direction and is arranged in a plurality of rows along a second direction at intervals, the second support rib extends along the second direction and is arranged in a plurality of rows along the first direction at intervals, the first direction and the second direction are arranged in a cross manner, and the first support rib and the second support rib together form a grid-shaped structure;
wherein at least one mesh of the mesh-like structure defines the cavity.
4. The display panel according to claim 1, wherein the adhesive glue is an ultraviolet curing glue.
5. The display panel of claim 1, wherein the support structure is disposed proximate to an edge of the display panel.
6. The display panel of claim 1, wherein the display panel is a curved display panel, the display panel defines a bending region, and the support structure is formed at least in the bending region.
7. A method for manufacturing a display panel according to any one of claims 1 to 6, comprising:
providing a display module, and coating adhesive glue on one side of the display module;
locally curing the bonding glue to obtain a support structure;
and providing a cover plate, wherein the cover plate is covered on one side of the support structure back to the display module, and the bonding glue is integrally cured, so that the bonding glue is connected with the display module and the cover plate.
8. The method for manufacturing a display panel according to claim 7, wherein the adhesive glue is an ultraviolet curing glue;
the step of locally curing the bonding glue to obtain a support structure comprises:
and providing a photomask with a light transmission area at part, and irradiating the bonding glue with ultraviolet light through the photomask so that the ultraviolet light passes through the light transmission area and is cured on the bonding glue to form a support structure.
9. The method for manufacturing a display panel according to claim 8, wherein the step of providing a mask partially having a transparent region, and irradiating the adhesive through the mask with ultraviolet light to allow the ultraviolet light to pass through the transparent region and to cure on the adhesive to form a support structure comprises:
providing a first photomask with a first light-transmitting area locally, and performing ultraviolet irradiation on the adhesive through the first photomask so that ultraviolet light can penetrate through the first light-transmitting area and be cured on the adhesive to form a first supporting rib;
providing a second photomask with a second light-transmitting area locally, and performing ultraviolet irradiation on the adhesive through the second photomask so that ultraviolet light can penetrate through the second light-transmitting area and be cured on the adhesive to form second support ribs;
the extending direction of the first light-transmitting area and the extending direction of the second light-transmitting area are arranged in a crossed mode.
10. The method according to claim 8, wherein the number of the light-transmitting regions is one, wherein the light-transmitting regions include a first light-transmitting region and a second light-transmitting region, an extending direction of the first light-transmitting region and an extending direction of the second light-transmitting region are arranged to intersect with each other, and the first light-transmitting region and the second light-transmitting region are used to form a first support rib and a second support rib, respectively.
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| CN115359722B (en) | 2024-03-19 |
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