CN115953953B - Display module, manufacturing method thereof and display device - Google Patents
Display module, manufacturing method thereof and display device Download PDFInfo
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- CN115953953B CN115953953B CN202310089517.1A CN202310089517A CN115953953B CN 115953953 B CN115953953 B CN 115953953B CN 202310089517 A CN202310089517 A CN 202310089517A CN 115953953 B CN115953953 B CN 115953953B
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 239000012790 adhesive layer Substances 0.000 claims abstract description 135
- 238000005452 bending Methods 0.000 claims abstract description 128
- 239000003292 glue Substances 0.000 claims abstract description 96
- 239000010410 layer Substances 0.000 claims description 88
- 230000003287 optical effect Effects 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 49
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 47
- 239000000853 adhesive Substances 0.000 claims description 28
- 230000001070 adhesive effect Effects 0.000 claims description 28
- 239000004568 cement Substances 0.000 claims description 24
- 238000000576 coating method Methods 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 description 26
- 206010040954 Skin wrinkling Diseases 0.000 description 11
- 238000007906 compression Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 8
- 230000037303 wrinkles Effects 0.000 description 7
- 239000002131 composite material Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- -1 polydimethylsiloxane Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000003522 acrylic cement Substances 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000013464 silicone adhesive Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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Abstract
The application provides a display module, a manufacturing method thereof and a display device, wherein the display module comprises a display panel, an adhesive layer and a cover plate, the display panel comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area, the long-side bending area and the short-side bending area are arranged around the plane area at intervals along the circumferential direction of the plane area, and the long-side bending area and the short-side bending area are connected through the corner bending area; the corner bending region comprises a first middle region and a first edge region positioned at one side of the first middle region, and the first middle region is positioned between the first edge region and the plane region; the glue film includes first glue film and second glue film, and the second glue film sets up between display panel and first glue film, and first glue film covers display panel's plane district, long limit bending zone, minor face bending zone and bight bending zone, and the orthographic projection of second glue film on display panel corresponds display panel's plane district, long limit bending zone, minor face bending zone and first intermediate region.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display module, a manufacturing method thereof and a display device.
Background
Along with the continuous development of display technology, in order to realize a better display effect of a display device, a display module is required to have a larger screen duty ratio, at present, in a medium-high end display product, the duty ratio of a quadric display module is in an ascending trend, in the quadric display module, the specification of a terminal for the quadric display module entering a Lens compound curvature region R is also more and more severe, along with the continuous deep research of the quadric display module technology, when the display module enters the compound curvature region R, module materials are compressed, and after the compression amount exceeds a certain limit, the display module materials are wrinkled, so that the reliability of product performance is affected.
Disclosure of Invention
In order to solve the above problems, the present invention provides a display module, a manufacturing method thereof, and a display device, so as to reduce the risk of wrinkling of the quadric display module in the compound curvature region R.
In a first aspect, an embodiment of the present application provides a display module, where the display module includes a display panel, a glue layer, and a cover plate, and the glue layer is located between the display panel and the cover plate;
the display panel comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area, wherein the long-side bending area and the short-side bending area are arranged around the plane area at intervals along the circumferential direction of the plane area, and the long-side bending area and the short-side bending area are connected through the corner bending area;
The corner bending region comprises a first middle region and a first edge region positioned at one side of the first middle region, the first edge region is respectively connected with the long-side bending region and the short-side bending region, the first edge region is not contacted with the plane region, and the first middle region is positioned between the first edge region and the plane region;
The glue film includes first glue film and second glue film, first glue film sets up display panel with between the second glue film, first glue film covers display panel's plane district, long limit bending zone, minor face bending zone and bight bending zone, the orthographic projection on the display panel is in display panel corresponds display panel's plane district, long limit bending zone, minor face bending zone and first intermediate zone.
In a second aspect, an embodiment of the present application provides a method for manufacturing a display module, including the following steps:
The display panel comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area, wherein the long-side bending area and the short-side bending area are arranged around the plane area at intervals along the circumferential direction of the plane area, and the long-side bending area and the short-side bending area are connected through the corner bending area;
The corner bending region comprises a first middle region and a first edge region positioned at one side of the first middle region, the first edge region is respectively connected with the long-side bending region and the short-side bending region, the first edge region is not contacted with the plane region, and the first middle region is positioned between the first edge region and the plane region;
Coating a first liquid optical cement on the surface of the display panel, and semi-solidifying the first liquid optical cement by adopting a first UV irradiation condition to form a first semi-solidified glue layer, wherein a coating area of the first liquid optical cement comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area of the display panel;
coating a second liquid optical cement on the surface of the first semi-cured cement layer, and semi-curing the second liquid optical cement by adopting a second UV irradiation condition to form a second semi-cured cement layer, wherein the orthographic projection of a coating area of the second liquid optical cement on the display panel corresponds to a plane area, a long-side bending area, a short-side bending area and a first middle area of the display panel;
and curing the first semi-cured adhesive layer by adopting a third UV irradiation condition to form a first adhesive layer, curing the second semi-cured adhesive layer to form a second adhesive layer, and laminating the cover plate and the display panel and vacuum attaching to obtain the display module.
In a third aspect, an embodiment of the present application further provides a display device, where the display device includes the display module set according to the first aspect or the display module set manufactured by the manufacturing method according to the second aspect.
The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:
in the application, in the composite curvature area R of the display module, only the first adhesive layer is arranged between the cover plate and the display panel, and the second adhesive layer is not arranged, so that the thickness of the adhesive layer in the composite curvature area R is smaller than that of the adhesive layer in other areas, when the display module is compressed, the adhesive layer in the composite curvature area R can reduce the risk of wrinkling of the adhesive layer in the compression process due to the smaller thickness, and meanwhile, in other areas except the composite curvature area R, the surfaces of the adhesive layer are respectively contacted with the cover plate and the display module, the thickness of the adhesive layer in the area is thicker, and the adhesive layer is not easy to generate bubbles or foam return in the compression process, thereby being beneficial to improving the reliability of the display module.
The application provides a manufacturing method of a display module, which utilizes the fluidity and solidification characteristics of liquid optical glue, adopts first liquid optical glue to manufacture a first half solidified glue layer on the surface of one side of a display panel facing a cover plate, covers the surface of the whole display panel facing one side of the cover plate, adopts second liquid optical glue to manufacture a second half solidified glue layer on the surface of one side of the first half solidified glue layer facing the cover plate, does not cover a compound curvature area R corresponding to the first half solidified glue layer, and finally adopts UV light source irradiation to solidify the first half solidified glue layer to form the first glue layer before the display panel and the cover plate are subjected to vacuum lamination, and the second half solidified glue layer is solidified to form the second glue layer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a four-curved screen in the related art;
FIG. 2 is a cross-sectional view of D-D' of FIG. 1;
FIG. 3 is a side view of a display module according to an embodiment of the present application;
FIG. 4 is a schematic top view of a display panel according to the present application;
fig. 5 is a schematic top view of a glue layer according to an embodiment of the present application;
Fig. 6 is a schematic top view of a first adhesive layer according to an embodiment of the present application;
Fig. 7 is a schematic top view of a second adhesive layer according to an embodiment of the present application;
fig. 8 is a side view structural diagram of a glue layer of a display module according to an embodiment of the present application, where the glue layer includes a first glue layer, a second glue layer, and a third glue layer;
FIG. 9 is a side view of a glue layer and a display panel provided by an embodiment of the application;
FIG. 10 is a flowchart of a method for manufacturing a display module according to an embodiment of the present application;
fig. 11 is a schematic structural diagram of a display device provided by the present application.
In the accompanying drawings:
100-a display device;
10-a display module;
1-a cover plate;
2-an adhesive layer;
21-a first glue layer;
22-a second glue layer;
221-a second intermediate region;
222-a second edge region;
23-a third adhesive layer;
3-a display panel;
31-planar region;
32-a long-side bending region;
33-short edge bending region;
34-corner inflection zones;
341-a first intermediate region;
342-first edge region.
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The quadric screen is a curved screen with curved surfaces at the upper end and the lower end on the basis of the bending of the screen at the left side and the right side of the plane screen at the middle part (hyperbolic screen), namely the quadric screen is provided with curved surfaces in the upper direction, the lower direction, the left direction and the right direction, and compared with the hyperbolic display screen, the quadric display screen has larger improvement on the performance of the screen in the aspects of screen occupation ratio and the like.
The applicant has found that the four corners of a quadric screen have curved overlapping regions of long and short sides when attached, and that the display panel is compressed during attachment when the display panel enters the curved overlapping region, which region is referred to as the compound curvature region (R' angle in fig. 1). Specifically, in the process of attaching the display panel, since the display panel is further covered with the cover plate, according to the appearance requirement of the cover plate covered on the display panel, as the bending angle of the compound curvature region R' increases, the stress deformation degree of the display panel is in an increasing trend, so that the use reliability of the display module is reduced, and the requirement of a user cannot be met.
Fig. 1 is a schematic structural view of a related art quadric screen, and fig. 2 is a sectional view of D-D' in fig. 1, wherein a stacked structure of the quadric screen includes: the cover plate 1', the adhesive layer 2', the polaroid layer 3', the display panel 4' and the supporting piece 5' which are sequentially stacked, wherein the supporting piece 5' is mainly used for supporting the display panel 4', and plays a certain buffering role on the display panel 4' so as to prevent the display panel 4' from deforming, generally, when a compound curvature region R ' of the adhesive layer 2', the polaroid layer 3', the display panel 4' and the supporting piece 5' enters a compound curvature region R ' of the cover plate, the display module is compressed, and when the compression amount of each film layer (the adhesive layer 2', the polaroid layer 3', the display panel 4' and the supporting piece 5 ') of the display module is higher than the compression characteristic of each film layer, a wrinkling phenomenon can occur, so that the reliability of the four-curve screen is affected.
Through intensive research on the quadric screen, when the compound curvature area R 'of the display module enters the compound curvature area R' of the cover plate, wrinkles are generated when the extrusion on each film layer of the display module exceeds a certain compression amount, and in the process of researching how to reduce the risk of the wrinkles, the applicant finds that the process for improving the polaroid layer, the display panel and the supporting piece is more complex, the cost is higher, the manufacturing process of the adhesive layer is simple, the manufacturing cost is lower, and at present, researchers generally reduce the risk of the wrinkles by reducing the thickness of the adhesive layer erected between the display panel and the cover plate, however, the simple reduction of the thickness of the adhesive layer can cause the problems of bubbles, foam returning and the like in the use process of the display module.
Based on the above consideration, in order to solve the problem that the display module is easy to generate the risk of wrinkles in the compound curvature region R, the application provides the display module, which can reduce the risk of wrinkles of the adhesive layer in the compound curvature region R, thereby preventing the display module from generating wrinkles in the compound curvature region R, and simultaneously avoiding the problems of bubbles, foam returning and the like of the adhesive layer in the use process, so as to improve the reliability of the four-curve screen.
The following description refers to the accompanying drawings and specific embodiments.
Fig. 3 is a side view of a display module 10 according to an embodiment of the present application, where the display module 10 includes: the display panel 3, the adhesive layer 2 and the cover plate 1, the adhesive layer 2 is located between the display panel 3 and the cover plate 1, and the light emitting surface of the display panel 3 is opposite to the cover plate 1, as the arrow direction Z in fig. 1 indicates the light emitting direction of the display module 10.
It should be noted that, fig. 3 only illustrates the display module 10 of the present application by taking a rectangle as an example, and the specific shape of the display module 10 is not limited, and in some other embodiments of the present application, the shape of the display module 10 may also be a circle, an ellipse, or other shapes different from the rectangle. In addition, fig. 3 only illustrates the relative positional relationship among the display panel 3, the adhesive layer 2, and the cover plate 1 in the display module 10, and does not represent the actual dimensions of each film layer.
In some embodiments, the display panel 3 includes a display area and a non-display area, wherein the display area of the display panel 3 forms the display area of the display module 10, and the non-display area of the display panel 3 forms the non-display area of the display module 10. Specifically, as shown in fig. 4, the display panel 3 includes a planar area 31, a long-side bending area 32, a short-side bending area 33, and a corner bending area 34, wherein the long-side bending area 32 and the short-side bending area 33 are disposed around the planar area 31 along the circumferential direction of the planar area 31 at intervals, and the long-side bending area 32 and the short-side bending area 33 are connected through the corner bending area 34. In the present application, the flat area 31 is a display area of the display panel 3, and the long-side bending area 32, the short-side bending area 33, and the corner bending area 34 are non-display areas of the display panel 3, wherein the non-display areas are formed around the flat area 31.
The display panel 3 is illustratively a flexible display panel, wherein the display area of the display panel 3 comprises a plurality of light emitting devices, optionally organic light emitting diodes. The display panel 3 includes a substrate and a driving layer provided with pixel circuits for driving the light emitting devices to emit light. The substrate is a flexible substrate. The display panel 3 further comprises a packaging layer, which is positioned on one side of the light emitting device far away from the driving layer, and the packaging layer is used for packaging and protecting the light emitting device so as to prolong the service life of the light emitting device. In some embodiments, the display panel 3 further includes a touch layer, which is located on a side of the encapsulation layer away from the light emitting device, and the touch layer includes a touch electrode, so that the display module 10 has a touch function. Optionally, the display panel 3 further includes an anti-reflection layer, where the anti-reflection layer is used to reduce reflection of ambient light by the display panel 3 to improve display effect, and the anti-reflection layer is located on a side of the touch layer away from the encapsulation layer. In some embodiments, the anti-reflective layer includes a color filter that overlaps the light emitting device.
With continued reference to fig. 4, the corner bending region 34 includes a first middle region 341 and a first edge region 342 located at one side of the first middle region 341, where the first edge region 342 is connected to the long-edge bending region 32 and the short-edge bending region 33, the first edge region 342 is not in contact with the plane region 31, and the first middle region 341 is located between the first edge region 342 and the plane region 31, and the first edge region 342 is the compound curvature region R of the display module 10 provided in the embodiment of the application.
With continued reference to fig. 3 and 4, the adhesive layer 2 includes a first adhesive layer 21 and a second adhesive layer 22, where the first adhesive layer 21 is disposed between the display panel 3 and the second adhesive layer 22, that is, the display module 10 of the present application includes a cover plate 1, the second adhesive layer 22, the first adhesive layer 21 and the display panel 3 sequentially stacked, where the first adhesive layer 21 covers a planar area 31, a long-side bending area 32, a short-side bending area 33 and a corner bending area 34 of the display panel 3, and an orthographic projection of the second adhesive layer 22 on the display panel 3 corresponds to the planar area 31, the long-side bending area 32, the short-side bending area 33 and the first middle area 341 of the display panel 3. Referring to fig. 5 to 7, fig. 5 is a schematic top view structure of the adhesive layer 2, fig. 6 is a schematic top view structure of the first adhesive layer, and fig. 7 is a schematic top view structure of the second adhesive layer, so that in the first edge region 342 of the corner bending region 34, i.e. in the compound curvature region R of the display module 10, only the first adhesive layer 21 is disposed, but the second adhesive layer 22 is not disposed, so that the thickness of the adhesive layer 2 including the first adhesive layer 21 and the second adhesive layer 22 in the compound curvature region R is smaller than that of the adhesive layer 2 in other regions, and when the display module 10 is compressed, the adhesive layer 2 in the compound curvature region R can reduce the risk of wrinkles generated in the compression process of the adhesive layer 2, meanwhile, the surface of the adhesive layer 2 is respectively contacted with the cover plate 1 and the display module 10 in other regions except the compound curvature region R, and the thickness of the adhesive layer 2 in other regions except the compound curvature region R is thicker, so that the adhesive layer 2 is not easy to generate bubbles or bubbles in the compression process, which is beneficial to improving the reliability of the display module 10.
In some embodiments, the cover 1 includes a plane area and a bending area (the plane area and the bending area are not shown in the drawings), the plane area of the cover 1 corresponds to the display area of the display panel 3, the bending area of the cover 1 corresponds to the non-display area of the display panel 3, the bending area is located at the edge of the cover 1, the cover 1 at the position of the bending area has a certain bending shape, the cover 1 is used for protecting the display panel 3, and the cover 1 may be a resin cover or a glass cover.
In some embodiments, the display module 10 further includes a support (the support is not shown in the drawings), where the support is located on a side of the display module 10 away from the adhesive layer 2, and the support is used to protect and support the back side of the display panel 3, so as to improve the overall mechanical stability of the display module 10.
In some embodiments, the back side of the display panel 3 is further provided with foam, mesh glue, a light shielding layer, an electrostatic discharge layer, and the like.
In some embodiments, the second glue layer 22 has a thickness D 2 and the first glue layer 21 has a thickness D 1, wherein 0 < D 2≤D1/2. So set up for the thickness ratio of second glue film 22 in glue film 2 is less than the thickness ratio of first glue film 21 in glue film 2 far away, when making first glue film 21 can guarantee close connection apron 1 and display module assembly 10, make the thickness of glue film 2 in the compound curvature district R thinner, and then reduce compound curvature district R's stress size, thereby reduce the risk that display module assembly 10 takes place the fold, prolong the life of display module assembly 10, the reliability performance of reinforcing display module assembly 10.
In some embodiments, the thickness D 1 of the first adhesive layer 21 is 80 μm to 150 μm, specifically, may be 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm or 150 μm, or the like, but may be other values within the above range, and the present application is not limited thereto.
In some embodiments, the thickness D 2 of the second adhesive layer 22 is 10 μm to 60 μm, specifically 10 μm, 20 μm, 30 μm, 40 μm, 50 μm or 60 μm, etc., but other values within the above range are also possible, and the application is not limited thereto.
The embodiment of the invention also provides a manufacturing method of the display module 10, which can be used for manufacturing the display module 10 provided by the embodiment of the invention. Before the display panel 3 and the cover plate 1 are vacuum bonded, the first adhesive layer 21 is manufactured on one side of the display panel 3 facing the cover plate 1, the first adhesive layer 21 is in a semi-cured state, the second adhesive layer 22 is manufactured on one side surface of the first adhesive layer 21 facing the cover plate 1, and the second adhesive layer 22 is in a semi-cured state. The elastic modulus of the glue in the fully cured state is greater than that of the glue in the semi-cured state, and the fluidity of the glue in the semi-cured state is greater than that of the glue in the fully cured state. The glue can be made semi-cured or fully cured by controlling the UV (Ultraviolet) irradiation conditions used when irradiating the glue.
In some embodiments, the first adhesive layer 21 is made of a Liquid Optical adhesive (LOCA, liquid Optical CLEAR ADHESIVE) in the display module 10 of the present application. Liquid optical adhesives that may be used include silicone water (mainly composed of polydimethylsiloxane) or acrylic glue (mainly composed of polyurethane or rubber modified acrylate). Compared with the conventional solid optical adhesive, the liquid optical adhesive has better fluidity, can be manufactured at a required position by adopting a coating process, can control the coating position relatively accurately, and can reach a fully cured state after being irradiated by a UV light source.
In some embodiments, the second adhesive layer 22 is also made of liquid optical adhesive in the display module 10 of the present application. Liquid optical adhesives that may be used include silicone water (mainly composed of polydimethylsiloxane) or acrylic glue (mainly composed of polyurethane or rubber modified acrylate).
In some embodiments, the materials of the first adhesive layer 21 and the second adhesive layer 22 are the same, so that the material cost can be reduced.
In some embodiments, the materials of the first adhesive layer 21 and the second adhesive layer 22 are different, because the first adhesive layer 21 is manufactured first in the process of manufacturing the display module 10, and the first adhesive layer 21 is in a semi-cured state, when the second adhesive layer 22 is manufactured on the surface of the first adhesive layer 21, at the boundary between the second adhesive layer 22 and the first adhesive layer 21, the glue of the first adhesive layer 21 and the second adhesive layer 22 is partially mixed, so as to form a mixture formed by the material of the second adhesive layer 22 and the material of the first adhesive layer 21, namely, the third adhesive layer 23, as shown in fig. 8, the adhesive layer of the display module comprises a side view structure diagram of the first adhesive layer, the second adhesive layer 22, the third adhesive layer 23, the first adhesive layer 21 and the display panel 3, and the existence of the third adhesive layer 23, which are sequentially laminated, thereby being beneficial to improving the integrity and mechanical strength of the adhesive layer 2, ensuring that crease, pinhole, light leakage and the like are not easy to occur in the use process of the adhesive layer 2, and being beneficial to improving the reliability of the display module 10.
In some embodiments, please continue to refer to fig. 7 and 9, fig. 7 is a top view of the second adhesive layer, fig. 9 is a side view of the adhesive layer and the display panel, the second adhesive layer 22 includes a second middle region 221 and a second edge region 222, the second edge region 222 is disposed around the second middle region 221 and extends along the direction of the plane region 31 pointing to the corner bending region 34, that is, the second edge region extends along the Y-axis direction shown in fig. 7, in fig. 9, the dashed line is a parallel line parallel to the surface of the display panel 3, and the thickness of the second adhesive layer 22 sequentially decreases along the direction of the second middle region 221 pointing to the second edge region 222, so that the second adhesive layer 22 sequentially presents a thickness decreasing variation along the direction of the second middle region 221 pointing to the second edge region 222 and the direction of the compound curvature region R, which can avoid the problem of uneven stress of the adhesive layer 2, thereby improving the reliability of the display module 10.
In some embodiments, the minimum thickness of the second adhesive layer 22 is D 2min, and the maximum thickness of the second adhesive layer 22 is D 2max, where D 2max/2≤D2min＜D2max is set so that the thickness variation of the second adhesive layer 22 is smaller, which is beneficial to improving the surface flatness of the cover plate 1 after the cover plate 1 is connected to the display panel 3 through the adhesive layer 2. Illustratively, the minimum thickness of the second glue layer 22 is 30 μm for D 2min and the maximum thickness of the second glue layer 22 is 50 μm for D 2max.
Fig. 10 is a flowchart of a manufacturing method of a display module 10 according to an embodiment of the present application, where, as shown in fig. 10, the manufacturing method includes the following steps:
Step S10, providing a display panel 3, wherein the display panel 3 comprises a plane area 31, a long-side bending area 32, a short-side bending area 33 and a corner bending area 34, wherein the long-side bending area 32 and the short-side bending area 33 are arranged at intervals around the plane area 31 along the circumferential direction of the plane area 31, and the long-side bending area 32 and the short-side bending area 33 are connected through the corner bending area 34;
the corner bending region 34 includes a first middle region 341 and a first edge region 342 located at one side of the first middle region 341, the first edge region 342 is connected to the long-side bending region 32 and the short-side bending region 33, the first edge region 342 is not in contact with the plane region 31, and the first middle region 341 is located between the first edge region 342 and the plane region 31.
Step S20, coating a first liquid optical cement on the surface of the display panel 3, and semi-solidifying the first liquid optical cement by adopting a first UV irradiation condition to form a first semi-solidified glue layer, wherein a coating area of the first liquid optical cement comprises a plane area 31, a long-side bending area 32, a short-side bending area 33 and a corner bending area 34 of the display panel 3;
Step S30, coating a second liquid optical cement on the surface of the first semi-cured cement layer, and semi-curing the second liquid optical cement to form a second semi-cured cement layer by adopting a second UV irradiation condition, wherein the orthographic projection of the coating area of the second liquid optical cement on the display panel 3 corresponds to the plane area 31, the long-side bending area 32, the short-side bending area 33 and the first middle area 341 of the display panel 3;
In step S40, the first semi-cured adhesive layer is cured by using the third UV irradiation condition to form the first adhesive layer 21, the second semi-cured adhesive layer is cured to form the second adhesive layer 22, and the cover plate 1 and the display panel 3 are laminated and vacuum bonded to obtain the display module 10.
In the above-mentioned scheme, the manufacturing method of the display module 10 provided by the application utilizes the fluidity and solidification characteristics of the liquid optical glue, the first liquid optical glue is adopted to manufacture the first semi-solidified glue layer on the surface of one side of the display panel 3 facing the cover plate 1, the first semi-solidified glue layer covers the surface of the whole display panel 3 facing one side of the cover plate 1, the second liquid optical glue is adopted to manufacture the second semi-solidified glue layer on the surface of one side of the first semi-solidified glue layer facing the cover plate 1, the second semi-solidified glue layer does not cover the compound curvature area R corresponding to the first semi-solidified glue layer, finally, the first semi-solidified glue layer is solidified by adopting the irradiation of the UV light source to form the first glue layer before the display panel 3 and the cover plate 1 are subjected to vacuum lamination, the second semi-solidified glue layer is solidified to form the second glue layer, and the thickness of the glue layer 2 in the compound curvature area R is thinner when the subsequent display panel 3 and the cover plate 1 are subjected to vacuum lamination, so that the risk of the glue layer 2 is reduced in the compression process, and meanwhile, the glue layer 2 is not easy to generate bubbles and returns.
In some embodiments, the first liquid optical adhesive and the second liquid optical adhesive are the same, and when the display module 10 is manufactured, the first liquid optical adhesive adopted in the step S20 and the second liquid optical adhesive adopted in the step S30 are the same optical adhesive, so that the material cost can be reduced.
In other embodiments, the first liquid optical adhesive and the second liquid optical adhesive are different, and the first liquid optical adhesive is acrylic adhesive, the second liquid optical adhesive is organic silicone adhesive, before the display panel 3 and the cover plate 1 are subjected to vacuum lamination, the first liquid optical adhesive is first used for manufacturing a first semi-cured adhesive layer on the display panel 3, and then the second liquid optical adhesive is used for manufacturing a second semi-cured adhesive layer on the first semi-cured adhesive layer, and the first semi-cured adhesive layer and the second semi-cured adhesive layer both have certain fluidity, so that a mixture layer of the first liquid optical adhesive and the second liquid optical adhesive is formed in a contact area of the first semi-cured adhesive layer and the second semi-cured adhesive layer, namely a third semi-cured adhesive layer, and finally, the first semi-cured adhesive layer is irradiated by a UV light source, so that the first adhesive layer 21 is formed after the first semi-cured adhesive layer is fully cured, the second semi-cured adhesive layer 22 is formed, and the third semi-cured adhesive layer 23 is formed after the third semi-cured adhesive layer is fully cured, and thus the third adhesive layer 23 is mainly connected before the first semi-cured adhesive layer 21 and the second semi-cured adhesive layer 22 is fully cured, so that the overall mechanical strength and the mechanical strength of the first semi-cured adhesive layer and the second semi-cured adhesive layer are improved.
In some embodiments, the first semi-cured adhesive layer and the second semi-cured adhesive layer in the semi-cured state are manufactured by using the UV light source, and then the semi-cured state of the first semi-cured adhesive layer and the second semi-cured adhesive layer is converted into the full-cured state by using the UV light source, and the second semi-cured layer in the semi-cured state has certain fluidity, so that a small amount of the second liquid optical adhesive flows into the compound curvature region R in the manufacturing process, and the thickness of the second semi-cured layer in the compound curvature region R is smaller than the thickness of the second semi-cured layer in the plane region 31, the long-side bending region 32, the short-side bending region 33 and the first middle region 341, and the risk of wrinkling of the adhesive layer 2 in the compression process can be reduced.
In some embodiments, when the display module 10 is manufactured, the light intensity of the UV light source adopted by the first UV irradiation condition is smaller than the light intensity of the UV light source adopted by the third UV irradiation condition, the light intensity of the UV light source adopted by the second UV irradiation condition is smaller than the light intensity of the UV light source adopted by the third UV irradiation condition, and the irradiation duration in the first UV irradiation condition, the second UV irradiation condition and the third UV irradiation condition is the same.
In this embodiment, the light intensities of the first UV irradiation condition and the second UV irradiation condition may be the same or different, and may be selected according to the curing rates of the first semi-cured adhesive layer and the second semi-cured adhesive layer. Preferably, the light intensities of the first UV irradiation condition and the second UV irradiation condition are the same, so that the glue layer of the finally prepared display module 10 has relatively uniform stress distribution, which is beneficial to prolonging the service life of the display module 10.
In some embodiments, when the display module 10 is manufactured, the irradiation time length of the UV light source adopted by the first UV irradiation condition is shorter than the irradiation time length of the UV light source adopted by the third UV irradiation condition, the irradiation time length of the UV light source adopted by the second UV irradiation condition is shorter than the irradiation time length of the UV light source adopted by the third UV irradiation condition, the irradiation light intensities in the first UV irradiation condition, the second UV irradiation condition and the third UV irradiation condition are the same, the first liquid optical adhesive and the second liquid optical adhesive are made to be in a semi-cured state after being irradiated by the UV light source with shorter irradiation time length, and the first optical adhesive and the second liquid optical adhesive which are made to be in a fully cured state after being semi-cured by the UV light source with longer irradiation time length are controlled to realize different irradiation energy so as to realize the treatments of different curing degrees of the liquid optical adhesive.
In this embodiment, the irradiation time periods of the first UV irradiation condition and the second UV irradiation condition may be the same or different, and may be selected according to the curing rates of the first semi-cured adhesive layer and the second semi-cured adhesive layer. Preferably, the irradiation time periods of the first UV irradiation condition and the second UV irradiation condition are the same, so that the glue layer of the finally prepared display module 10 has relatively uniform stress distribution, which is beneficial to prolonging the service life of the display module 10.
In some embodiments, when the display module 10 is manufactured, the light intensity of the UV light source used in the first UV irradiation condition is smaller than the light intensity of the UV light source used in the third UV irradiation condition, the light intensity of the UV light source used in the second UV irradiation condition is smaller than the light intensity of the UV light source used in the third UV irradiation condition, and the duration of the UV light source used in the first UV irradiation condition is smaller than the duration of the UV light source used in the third UV irradiation condition, and the duration of the UV light source used in the second UV irradiation condition is smaller than the duration of the UV light source used in the third UV irradiation condition.
Based on the same inventive concept, an embodiment of the present application further provides a display device 100, as shown in fig. 11, fig. 11 is a schematic diagram of the display device 100 according to the embodiment of the present application, where the display device 100 includes the display module 10 described above. The specific structure of the display module 10 is described in detail in the above embodiments, and will not be described herein. Of course, the display device 100 shown in fig. 11 is only a schematic illustration, and the display device 100 may be any electronic apparatus having a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.
Claims (11)
1. The display module is characterized by comprising a display panel, a glue layer and a cover plate, wherein the glue layer is positioned between the display panel and the cover plate;
The display panel comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area, wherein the long-side bending area and the short-side bending area are arranged around the plane area at intervals along the circumferential direction of the plane area, and the long-side bending area and the short-side bending area are connected through the corner bending area;
The corner bending region comprises a first middle region and a first edge region positioned at one side of the first middle region, the first edge region is respectively connected with the long-side bending region and the short-side bending region, the first edge region is not contacted with the plane region, and the first middle region is positioned between the first edge region and the plane region;
The glue film includes first glue film and second glue film, first glue film sets up display panel with between the second glue film, first glue film covers display panel's plane district, long limit bending zone, minor face bending zone and bight bending zone, the orthographic projection on the display panel is in display panel corresponds display panel's plane district, long limit bending zone, minor face bending zone and first intermediate zone.
2. The display module of claim 1, wherein the second glue layer has a thickness D 2 and the first glue layer has a thickness D 1, wherein 0 < D 2≤D1/2.
3. The display module of claim 1, wherein the first adhesive layer is made of liquid optical adhesive; and/or
The second adhesive layer is made of liquid optical adhesive.
4. The display module of claim 1, wherein the second glue layer and the first glue layer are of different materials.
5. The display module assembly of claim 4, wherein a third glue layer is further disposed between the second glue layer and the first glue layer, and wherein the material of the third glue layer comprises a mixture of the second glue layer material and the first glue layer material.
6. The display module of claim 1, wherein the second adhesive layer includes a second middle region and a second edge region, the second edge region is disposed around the second middle region and extends along the direction in which the planar region points to the corner bending region, and the thickness of the second adhesive layer decreases in sequence along the direction in which the second middle region points to the second edge region.
7. The display module of claim 6, wherein the minimum thickness of the second glue layer is D 2min and the maximum thickness of the second glue layer is D 2max, wherein D 2max/2≤D2min＜D2max.
8. The manufacturing method of the display module is characterized by comprising the following steps:
The display panel comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area, wherein the long-side bending area and the short-side bending area are arranged around the plane area at intervals along the circumferential direction of the plane area, and the long-side bending area and the short-side bending area are connected through the corner bending area;
The corner bending region comprises a first middle region and a first edge region positioned at one side of the first middle region, the first edge region is respectively connected with the long-side bending region and the short-side bending region, the first edge region is not contacted with the plane region, and the first middle region is positioned between the first edge region and the plane region;
Coating a first liquid optical cement on the surface of the display panel, and semi-solidifying the first liquid optical cement by adopting a first UV irradiation condition to form a first semi-solidified glue layer, wherein a coating area of the first liquid optical cement comprises a plane area, a long-side bending area, a short-side bending area and a corner bending area of the display panel;
coating a second liquid optical cement on the surface of the first semi-cured cement layer, and semi-curing the second liquid optical cement by adopting a second UV irradiation condition to form a second semi-cured cement layer, wherein the orthographic projection of a coating area of the second liquid optical cement on the display panel corresponds to a plane area, a long-side bending area, a short-side bending area and a first middle area of the display panel;
and curing the first semi-cured adhesive layer by adopting a third UV irradiation condition to form a first adhesive layer, curing the second semi-cured adhesive layer to form a second adhesive layer, and laminating the cover plate and the display panel and vacuum attaching to obtain the display module.
9. The method of claim 8, wherein the intensity of the UV light source used in the first UV irradiation condition is less than the intensity of the UV light source used in the third UV irradiation condition; and/or
The irradiation duration adopted by the first UV irradiation condition is smaller than the irradiation duration adopted by the third UV irradiation condition.
10. The method of claim 8, wherein the second UV irradiation condition employs a UV light source having a light intensity less than that of the third UV irradiation condition; and/or
The second UV irradiation condition employs an irradiation period of time that is less than the irradiation period of time employed by the third UV irradiation condition.
11. A display device, characterized in that the display device comprises the display module set according to any one of claims 1 to 7 or the display module set manufactured by the manufacturing method according to any one of claims 8 to 10.
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| CN112053633A (en) * | 2020-09-16 | 2020-12-08 | 京东方科技集团股份有限公司 | Display device |
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| JP2776344B2 (en) * | 1995-10-26 | 1998-07-16 | 日本電気株式会社 | Liquid crystal display |
| JP2004151549A (en) * | 2002-10-31 | 2004-05-27 | Seiko Epson Corp | Electro-optical panel, electro-optical device, electronic apparatus, and method of manufacturing electro-optical panel |
| KR101844432B1 (en) * | 2017-11-08 | 2018-04-03 | 삼성디스플레이 주식회사 | Display apparatus |
| CN112449033B (en) * | 2019-08-30 | 2023-04-14 | Oppo广东移动通信有限公司 | Electronic equipment, display screen assembly and display screen cover plate |
| CN111739413A (en) * | 2020-06-03 | 2020-10-02 | Oppo广东移动通信有限公司 | Terminal device, flexible screen and flexible display substrate |
| KR20220073234A (en) * | 2020-11-26 | 2022-06-03 | 엘지디스플레이 주식회사 | Display apparatus |
| CN216904951U (en) * | 2021-12-01 | 2022-07-05 | 荣耀终端有限公司 | Curved display module and terminal device |
| CN114882794B (en) * | 2022-05-23 | 2023-09-26 | 武汉华星光电半导体显示技术有限公司 | display module |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103955306A (en) * | 2014-03-07 | 2014-07-30 | 业成光电（深圳）有限公司 | Three-dimension curve surface touch control panel |
| CN112053633A (en) * | 2020-09-16 | 2020-12-08 | 京东方科技集团股份有限公司 | Display device |
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