CN113327518A - Curved surface display screen and manufacturing method thereof - Google Patents
Curved surface display screen and manufacturing method thereof Download PDFInfo
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- CN113327518A CN113327518A CN202110649945.6A CN202110649945A CN113327518A CN 113327518 A CN113327518 A CN 113327518A CN 202110649945 A CN202110649945 A CN 202110649945A CN 113327518 A CN113327518 A CN 113327518A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 43
- 238000003825 pressing Methods 0.000 claims abstract description 57
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- 239000012530 fluid Substances 0.000 claims abstract description 25
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- 239000000853 adhesive Substances 0.000 claims description 19
- 230000001070 adhesive effect Effects 0.000 claims description 19
- 238000001723 curing Methods 0.000 claims description 14
- 238000005507 spraying Methods 0.000 claims description 12
- 238000000016 photochemical curing Methods 0.000 claims description 5
- 238000010030 laminating Methods 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 12
- 238000010586 diagram Methods 0.000 description 16
- 239000010410 layer Substances 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 5
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- 239000003921 oil Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
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- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
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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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Abstract
The invention relates to a method for manufacturing a curved surface display screen, wherein the curved surface display screen comprises a flexible display panel, and the method for manufacturing the curved surface display screen comprises the following steps: providing a curved cover plate and a deformable pressing body; one side of the curved surface cover plate is provided with a concave binding surface, and the binding surface is provided with a first adhesive layer; the pressing body is constructed to be capable of forming a profiling surface matched with the binding surface after being filled with fluid; bearing the flexible display panel on the profiling surface to keep a preset distance between the flexible display panel and the binding surface; filling fluid into the pressing body to enable the pressing body to expand so as to enable the flexible display panel to be in complete contact with the first adhesive layer and keep the contact state for a preset time T; and curing the first adhesive layer to bond the flexible display panel and the curved cover plate into a whole. The problem that the existing curved-surface cover plate and flexible display panel are poor in laminating effect on curved-surface cover plates with large curvature and/or large arc angles and prone to loosening after bonding is solved.
Description
Technical Field
The invention relates to the technical field of display devices, in particular to a curved surface display screen and a manufacturing method thereof.
Background
In the manufacturing process of the curved surface display screen, the curved surface cover plate is attached to the flexible display panel in a very important step, whether the curved surface cover plate is completely attached to the flexible display panel or not and whether the curved surface cover plate can be kept stable after being attached to the flexible display panel or not are achieved, and the quality of the curved surface display screen can be directly influenced. The current laminating mode of the curved surface cover plate and the flexible display panel comprises two modes of roller laminating and rubber cushion laminating. The roller attaching mode is specifically that the flexible display panel is arranged on one side of the curved cover plate, and the roller rolls on one side of the flexible display panel, which is back to the curved cover plate, so that the flexible display panel is attached to the curved cover plate. The rubber cushion attaching mode is characterized in that the flexible display panel is arranged on one side of the curved cover plate, and the rubber cushion matched with the curved cover plate in shape is extruded on one side, back to the curved cover plate, of the flexible display panel, so that the flexible display panel is attached to the curved cover plate.
When the camber of curved surface apron is great, and/or the arc angle of curved surface apron is great, for example, when the curved surface apron was the C type, the application of force direction of gyro wheel laminating and rubber cushion laminating received the restriction for the effort distributes unevenly, leads to present curved surface apron and flexible display panel's laminating mode to the great and/or great curved surface apron of arc angle laminating effect not good to the camber, the condition of the pine takes off after the laminating appears easily.
Disclosure of Invention
Therefore, it is necessary to provide a curved display screen and a manufacturing method thereof for solving the problems that the existing bonding method of the curved cover plate and the flexible display panel has a poor bonding effect on the curved cover plate with a large curvature and/or a large arc angle and is easy to loosen after bonding.
A manufacturing method of a curved surface display screen comprises a flexible display panel, and comprises the following steps: providing a curved cover plate and a deformable pressing body; one side of the curved surface cover plate is provided with a concave binding surface, and the binding surface is provided with a first adhesive layer; the pressing body is configured to be capable of forming a profiling surface matched with the attaching surface after being filled with fluid; bearing the flexible display panel on the curved surface of the press fit body, and enabling the flexible display panel to face the attaching surface of the curved cover plate and keep a preset distance from the attaching surface; filling fluid into the pressing body, and expanding the pressing body to completely contact the flexible display panel with the first adhesive layer and keep the contact state for a preset time T; and curing the first adhesive layer to bond the flexible display panel and the curved cover plate into a whole.
In one embodiment, the first adhesive layer has a viscosity of μ 1, and the profiling surface has a viscosity of μ 2; the carrying of the flexible display panel on the contour surface of the press-fit body and the facing of the flexible display panel to the curved cover plate and the keeping of the preset distance between the facing surfaces specifically include: attaching the flexible display panel to the profiling surface to form an attaching body, and moving the attaching body towards one side of the attaching surface of the curved surface cover plate to enable the flexible display panel and the attaching surface of the curved surface cover plate to keep a preset distance; wherein the viscosity mu 1 of the first adhesive layer and the viscosity mu 2 of the profiling surface meet the condition: mu 1 > mu 2.
In one embodiment, the viscosity μ 1 of the first adhesive layer satisfies the condition: 0cP < mu 1 < 100 cP.
In one embodiment, before the attaching the flexible display panel to the contoured surface to form an attached body and moving the attached body toward the side of the attaching surface of the curved cover plate to keep a preset distance between the flexible display panel and the attaching surface of the curved cover plate, the method further includes: and filling a part of fluid into the press fit body to ensure that the flexible display panel attached to the profiling surface is conformal with the attaching surface of the curved cover plate.
In one embodiment, the method for manufacturing the curved display screen further includes: and spraying an aqueous adhesive on the binding surface of the curved surface cover plate and carrying out pre-curing treatment to form the first adhesive layer.
In one embodiment, the first adhesive layer has a thickness of less than or equal to 30 microns.
In one embodiment, the spraying of the aqueous adhesive on the bonding surface of the curved cover plate and the pre-curing treatment specifically include: and spraying an aqueous adhesive on the binding surface of the curved cover plate and carrying out photocuring treatment.
In one embodiment, the fluid comprises one or more of water, oil, and gas.
In one embodiment, the preset time period T satisfies the condition: t is more than 0 and less than 10 seconds.
A curved display screen comprising: one side of the curved surface cover plate is provided with a binding surface; the flexible display panel is attached to the attaching surface of the curved cover plate; the curved surface display screen is manufactured by adopting the manufacturing method of the curved surface display screen as above to attach the flexible display panel to the curved surface cover plate.
According to the manufacturing method of the curved-surface display screen, the first adhesive layer is arranged on the binding surface of the curved-surface cover plate, the flexible display panel is arranged on one side, provided with the binding surface, of the curved-surface cover plate, and therefore the flexible display panel is bound to the binding surface of the curved-surface cover plate through the first adhesive layer; the shape of the profiling surface is matched with that of the binding surface, and the size of a gap between the curved surface cover plate and the pressing body is adjusted by adjusting the amount of the filled fluid, so that an accommodating space with the same shape as the curved surface cover plate can be formed, the shape of the flexible display panel positioned in the accommodating space is correspondingly limited, and the flexible display panel can be kept to be bound on the binding surface of the curved surface cover plate in the shape through curing treatment. The shape of the pressing body is influenced by the amount of the filling fluid, so that the amount of the filling fluid is controlled according to the shape of the curved cover plate, the extrusion force of the pressing body on each part of the curved cover plate can be uniformly distributed, and the problems that the existing bonding mode of the curved cover plate and the flexible display panel has poor bonding effect on the curved cover plate with larger curvature and/or larger arc angle and the curved cover plate is easy to loosen after bonding are solved.
Drawings
FIG. 1 is a block diagram illustrating a process of a method for manufacturing a curved display screen according to an embodiment of the present invention;
FIG. 2 is a block diagram illustrating a process of another embodiment of a method for manufacturing a curved display screen according to the present invention;
FIG. 3 is a block diagram illustrating a manufacturing method of a curved display screen according to another embodiment of the present invention;
FIG. 4 is a block diagram illustrating a process of another embodiment of a method for manufacturing a curved display screen according to the present invention;
FIG. 5 is a block diagram illustrating a process of another embodiment of a method for manufacturing a curved display screen according to the present invention;
FIG. 6 is a schematic structural diagram illustrating a first adhesive layer formed on an attachment surface of a curved cover plate according to an embodiment of the method for manufacturing a curved display screen of the present invention;
FIG. 7 is a schematic structural diagram of a curved display screen according to an embodiment of the present invention, in which a flexible display panel and a pressing member are disposed on a platform and close to a curved cover plate;
FIG. 8 is a schematic structural diagram of a curved display screen according to an embodiment of the present invention, in which water is filled into the pressing body to form a profiling surface matching the attachment surface of the curved cover plate on the outer surface of the pressing body;
FIG. 9 is a schematic structural diagram of the pressing member being further inflated with water to expand the pressing member according to an embodiment of the method for manufacturing a curved display screen of the present invention;
FIG. 10 is a schematic structural view illustrating the expansion of the pressing member and the complete contact between the flexible display panel and the first adhesive layer according to the embodiment of the method for manufacturing a curved display panel of the present invention;
FIG. 11 is a schematic structural diagram of a method for manufacturing a curved display screen according to an embodiment of the present invention, in which water in a pressing body is pumped out to shrink the pressing body;
fig. 12 is a schematic structural view illustrating a flexible display panel and a curved cover plate bonded together according to an embodiment of the method for manufacturing a curved display screen of the present invention.
The reference numbers illustrate:
100: curved surface cover plate 200: flexible display panel
110: first adhesive layer 300: press-fit body
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
In the manufacturing process of the curved surface display screen, the curved surface cover plate is attached to the flexible display panel in a very important step, whether the curved surface cover plate is completely attached to the flexible display panel or not and whether the curved surface cover plate can be kept stable after being attached to the flexible display panel or not are achieved, and the quality of the curved surface display screen can be directly influenced. The current laminating mode of the curved surface cover plate and the flexible display panel comprises two modes of roller laminating and rubber cushion laminating.
The roller attaching mode is specifically that the flexible display panel is arranged on one side of the curved cover plate, and the roller rolls on one side of the flexible display panel, which is back to the curved cover plate, so that the flexible display panel is attached to the curved cover plate. However, when the curvature of the curved cover plate is large and/or the arc angle of the curved cover plate is large, for example, when the curved cover plate is C-shaped, the roller rolls along the C-shaped path, and when the roller rolls at the corner, the situation of uneven acting force is likely to occur, thereby easily causing poor connection of the line or local bubbles.
The rubber cushion attaching mode is characterized in that the flexible display panel is arranged on one side of the curved cover plate, and the rubber cushion matched with the curved cover plate in shape is extruded on one side, back to the curved cover plate, of the flexible display panel, so that the flexible display panel is attached to the curved cover plate. However, when the curvature of the curved cover plate is large and/or the arc angle of the curved cover plate is large, for example, when the curved cover plate is C-shaped, the rubber cushion has insufficient pressing force to both sides in the force application direction, which may result in insecure attachment of both sides.
Therefore, it is desirable to provide a method for manufacturing a curved display panel to solve the above problems.
Referring to fig. 1, fig. 1 is a block flow diagram illustrating a manufacturing method of a curved display screen according to an embodiment of the present invention, where the curved display screen includes a flexible display panel, and the manufacturing method of the curved display screen includes the following steps:
step S1, providing a curved cover plate and a pressing body; one side of the curved surface cover plate is provided with a binding surface, and the binding surface of the curved surface cover plate is provided with a first adhesive layer; the pressing body is constructed to be capable of forming a profiling surface matched with the attaching surface after being filled with fluid;
step S2, bearing the flexible display panel on the contour surface of the pressing body, and enabling the flexible display panel to face the binding surface of the curved cover plate and keep a preset distance from the binding surface;
step S3, filling fluid into the pressing body to make the pressing body expand to make the flexible display panel and the first adhesive layer completely contact and keep the contact state for a preset time T;
and step S4, curing the first adhesive layer to bond the flexible display panel and the curved cover plate into a whole.
According to the manufacturing method of the curved-surface display screen, the first adhesive layer is arranged on the binding surface of the curved-surface cover plate, for example, a layer of adhesive is pasted on the binding surface, or a layer of adhesive is coated on the binding surface, the flexible display panel is loaded on the profiling surface of the pressing body, the flexible display panel faces the binding surface of the curved-surface cover plate and keeps a preset distance with the binding surface, and therefore the first adhesive layer can be used for pasting the flexible display panel on the binding surface of the curved-surface cover plate.
The laminating body is constructed to be capable of forming a profiling surface matched with the laminating surface after being filled with fluid, when the flexible display panel is arranged between one side of the curved cover plate with the laminating surface and the laminating body and a preset distance is kept between the flexible display panel and the laminating surface of the curved cover plate, the laminating body is expanded to reduce the distance between the flexible display panel and the laminating surface of the curved cover plate by filling the fluid into the laminating body, and then the flexible display panel can be completely contacted with the first adhesive layer. The shape of the profiling surface is matched with that of the binding surface, the size of a gap between the curved surface cover plate and the pressing body is adjusted by adjusting the amount of the filled fluid, so that the shape of the flexible display panel can be limited to be the same as that of the curved surface cover plate, and the flexible display panel can be bound to the binding surface of the curved surface cover plate by curing. The size of the preset distance can be flexibly adjusted according to the sizes of the curved cover plate and the first adhesive layer, and is not limited herein.
And because the shape of the pressing body is influenced by the amount of the filling fluid, the amount of the filling fluid is controlled according to the shape of the curved cover plate, so that the pressing force of the pressing body on each part of the curved cover plate can be uniformly distributed, and the problems that the existing bonding mode of the curved cover plate and the flexible display panel has poor bonding effect on the curved cover plate with larger curvature and/or larger arc angle and is easy to loosen after bonding are solved.
Referring to fig. 2, fig. 2 is a block diagram illustrating a flow chart of another embodiment of the method for manufacturing a curved display screen according to the present invention. In some embodiments, the first adhesive layer has a viscosity of μ 1, and the side of the lamination body facing the curved cover plate has a viscosity of μ 2;
bear flexible display panel in the profiling face of the pressure fit to make flexible display panel towards the binding face of curved surface apron and with keep presetting the distance between the binding face and specifically include:
step S21, attaching the flexible display panel to the profiling surface to form an attaching body, and moving the attaching body towards one side of the attaching surface of the curved cover plate to keep a preset distance between the flexible display panel and the attaching surface of the curved cover plate;
wherein, the viscosity mu 1 of the first adhesive layer and the viscosity mu 2 of the profiling surface meet the condition:
μ1＞μ2。
in the above embodiment, the flexible display panel and the press-fit body form the fitting body through the viscosity of the side of the press-fit body facing the curved cover plate, and the fitting body formed by the flexible display panel and the press-fit body is arranged on the side of the fitting surface of the curved cover plate together, so that when the press-fit body expands, the flexible display panel can be accurately abutted to the fitting surface of the curved cover plate. In the process, the relative position between the binding face of the binding body and the curved cover plate is accurate only by ensuring, the relative position between the flexible display panel and the pressing body is not required to be adjusted repeatedly, so that the working efficiency is improved, the acting force applied by the pressing body to the flexible display panel is distributed more uniformly, and the binding effect is better. And the viscosity mu 1 of the first adhesive layer and the viscosity mu 2 of the profiling surface meet the condition: mu 1 is less than mu 2, so that the pressfitting body can be easily separated from the flexible display panel after the flexible display panel is attached to the first adhesive layer of the attaching surface of the curved cover plate.
In other embodiments, a second adhesive layer is disposed on a side of the pressing body facing the curved cover plate, the second adhesive layer has a viscosity of μ 2, and the flexible display panel and the pressing body form a fitting body through the second adhesive layer, so as to prevent the flexible display panel from separating from the pressing body in a process that the flexible display panel and the pressing body are close to the curved cover plate. And the viscosity mu 1 of the first adhesive layer and the viscosity mu 2 of the profiling surface meet the condition: mu 1 is less than mu 2, so that the pressfitting body can be easily separated from the flexible display panel after the flexible display panel is attached to the first adhesive layer of the attaching surface of the curved cover plate.
In some embodiments, the viscosity μ 1 of the first adhesive layer satisfies the condition: 0cP < mu 1 < 100cP, wherein the viscosity of the first adhesive layer, mu 1, is in centipoise (cP). Adopt the lower first gluing layer of viscosity to laminate flexible display panel and curved surface apron, be convenient for distribute first gluing layer in the binding face of curved surface apron more evenly to make the laminating between follow-up flexible display panel and the curved surface apron more even, it is more stable after the laminating.
Referring to fig. 3, fig. 3 is a block diagram illustrating a flow chart of another embodiment of the method for manufacturing a curved display screen according to the present invention. In some embodiments, the step of attaching the flexible display panel to the curved surface to form an attachment body, and moving the attachment body toward one side of the attachment surface of the curved cover plate, so that a preset distance is maintained between the flexible display panel and the attachment surface of the curved cover plate further includes:
step S201, filling a part of fluid into the pressing body, so that the flexible display panel attached to the profiling surface conforms to the attachment surface of the curved cover plate.
In the above embodiment, the flexible display panel is attached to the curved surface to form the attachment body, and the attachment body is moved toward one side of the attachment surface of the curved surface cover plate, before the attachment surface of the flexible display panel and the curved surface cover plate is kept at the preset distance, a part of fluid is filled into the attachment body, so that the flexible display panel attached to the curved surface is conformal with the attachment surface of the curved surface cover plate, that is, the curvature of the flexible display panel attached to the curved surface is equal to that of the curved surface cover plate, so that the flexible display panel is more conveniently attached to the outer surface of the attachment body, the shape of the attachment body is closer to the shape matched with the attachment surface of the curved surface cover plate, and the attachment body is enabled to attach the flexible display panel to the curved surface cover plate better.
Referring to fig. 4, fig. 4 is a block diagram illustrating a flow chart of another embodiment of the method for manufacturing a curved display screen according to the present invention. In some embodiments, the method for manufacturing the curved display screen further comprises:
step S11, spraying water-based adhesive on the binding surface of the curved cover plate and carrying out pre-curing treatment to form a first adhesive layer.
In the above embodiments, an aqueous adhesive is sprayed on the bonding surface of the curved cover plate to form the first adhesive layer. On one hand, the water-based adhesive is an environment-friendly adhesive prepared by using natural polymers or synthetic polymers as adhesives and water as a solvent or a dispersant to replace toxic organic solvents polluting the environment, so that the environmental protection of the product is improved; on the other hand, the viscosity of aqueous gluing agent is steerable in lower scope to be convenient for with its uniformly spray coating at the binding face of curved surface apron, with the homogeneity of guarantee first gluing layer, after the uniform spray coating, through the precuring treatment, can ensure that curved surface apron and flexible display panel laminate steadily.
In some embodiments, the first adhesive layer has a thickness of less than or equal to 30 micrometers. It can be understood that, the larger the thickness of the first adhesive layer is, the more the amount of the adhesive used is, the higher the cost is, and the larger the thickness of the first adhesive layer is, the larger the influence on the display effect of the curved surface display screen is, therefore, the above-mentioned embodiment limits the thickness of the first adhesive layer to be less than or equal to 30 micrometers, and when reducing the cost, reduces the influence of the first adhesive layer on the display effect of the curved surface display screen.
Referring to fig. 5, fig. 5 is a block diagram illustrating a flow chart of another embodiment of the method for manufacturing a curved display screen according to the present invention. In some embodiments, the step of spraying an aqueous adhesive on the bonding surface of the curved cover plate and performing a pre-curing treatment specifically includes:
and S111, spraying an aqueous adhesive on the binding surface of the curved cover plate and carrying out photocuring treatment.
In the embodiment, the aqueous adhesive sprayed on the binding surface of the curved cover plate is subjected to pre-curing treatment in a photocuring mode, so that the treatment efficiency is high, and the treatment process is economic, energy-saving and environment-friendly.
In the above embodiments, the fluid comprises one or more of water, oil and gas. The pressing body is filled with water, oil or gas, so that on one hand, the pressing body can expand to extrude the flexible display panel and attach the flexible display panel to the attaching surface of the curved cover plate; on the other hand, the extrusion force generated by water, oil or gas is more uniform, and the pressing body is prevented from being broken or the flexible display panel is prevented from being damaged.
In the above embodiment, the preset time period T satisfies the condition: t is more than 0 and less than 10 seconds. After the pressfitting body expands and makes flexible display panel and first gluing layer contact completely, need make the contact state keep a period of time, and this period of time that keeps the contact state is longer, and whole work efficiency is lower, consequently, it predetermines time T and satisfies the condition to inject: t is more than 0 and less than 10 seconds, so that the bonding effect of the flexible display panel and the first adhesive layer is guaranteed, and meanwhile, the working efficiency is improved.
Fig. 6 to 12 are schematic structural diagrams illustrating a process of attaching a flexible display panel to a curved cover plate according to an embodiment of the method for manufacturing a curved display screen of the present invention. In a specific embodiment, the manufacturing method of the curved surface display screen comprises the following steps: referring to fig. 6, the curved surface cover plate 100 is placed in a jig cavity with a shape adapted to the shape of the curved surface cover plate 100, so that the curved surface cover plate 100 is attached to the inner wall of the cavity, and the curved surface cover plate 100 is fixed to the inner wall of the cavity in an adsorption manner by means of vacuum pumping; spraying water-based adhesive on the binding surface of the curved cover plate 100, and performing pre-curing treatment on the water-based adhesive sprayed on the binding surface in a photocuring manner to form a first adhesive layer 110 with a thickness of 25 micrometers after the pre-curing treatment.
Referring to fig. 7 and 8, in an embodiment of the present invention, a water bag is provided, the water bag is used as the pressing body 300, the pressing body 300 is placed on the platform below the curved cover plate 100, the flexible display panel 200 is placed on the pressing body 300, the platform is used to drive the pressing body 300 and the flexible display panel 200 to approach the curved cover plate 100, and water is filled into the pressing body 300 during the approach process, so that the outer surface of the pressing body 300 forms a profiling surface matching the attaching surface of the curved cover plate 100. The material of the pressing body 300 is silica gel or other alternative materials, which is not limited herein, and the adhesion between the flexible display panel 200 and the silica gel is used to ensure that the flexible display panel 200 does not fall off during the expansion process of the pressing body 300. In addition, the water bag is used as a pressing body 300, and in order to avoid water leakage, the water inlet and the water outlet of the water bag control water inlet and outlet through water valves; the water inlet and the water outlet are the same opening or two different openings.
Referring to fig. 9 and 10, the bonding body 300 and the flexible display panel 200 supported on the bonding body 300 are continuously moved toward the bonding surface of the curved cover 100, the flexible display panel 200 and the bonding surface are spaced apart from each other and kept in a spaced state, and part of water is further filled into the bonding body 300 to expand the bonding body 300, so that the flexible display panel 200 and the first adhesive layer 110 are completely contacted and kept in a contact state for 4 to 8 seconds.
Referring to fig. 11, the water in the pressing body 300 is pumped out or released, so that the pressing body 300 shrinks and separates from the flexible display panel 200. In any embodiment of the present invention, the pressing body 300 may be filled with other fluids, gases or change the fluid into a solid (e.g., ice), and the invention is not limited thereto.
Referring to fig. 12, the platform is separated from the curved cover plate, and the first adhesive layer 110 is photo-cured, so that the flexible display panel 200 and the curved cover plate 100 are bonded together. After the pressing body 300 is expanded, pressure can be uniformly applied to the flexible display panel 200 from all directions, so that all parts of the flexible display panel 200 can be uniformly and stably attached to the curved cover plate 100. Moreover, since the viscosity of the profiling surface is less than that of the first adhesive layer 110, the bonded body 300 can be smoothly separated from the flexible display panel 200 after the bonding is completed, and the bonding state between the flexible display panel 200 and the curved cover plate 100 is not affected.
The invention also provides a curved surface display screen which comprises a curved surface cover plate and a flexible display screen, wherein one side of the curved surface cover plate is provided with a binding surface, and the flexible display panel is arranged on the binding surface of the curved surface cover plate. The curved surface display screen is manufactured by the manufacturing method of the curved surface display screen, and the flexible display panel is attached to the curved surface cover plate.
In the above embodiment, because the problem that the attaching effect of the attaching mode of the current curved surface cover plate and the flexible display panel to the curved surface cover plate with larger curvature and/or larger arc angle is not good and the situation of loosening after bonding is easy to occur is solved, the bending angle of the curved surface display screen can be increased relative to the bending angle of the current existing curved surface display screen, based on this, the curved surface display screen not only can achieve the effect of the current waterfall screen on the front, the left side and the right side of the display screen to display pictures, but also can achieve the effect of displaying pictures on the front, the left side, the right side and the reverse side of the display screen.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The manufacturing method of the curved surface display screen comprises a flexible display panel, and is characterized by comprising the following steps:
providing a curved cover plate and a deformable pressing body; one side of the curved surface cover plate is provided with a concave binding surface, and the binding surface is provided with a first adhesive layer; the pressing body is configured to be capable of forming a profiling surface matched with the attaching surface after being filled with fluid;
bearing the flexible display panel on the curved surface of the press fit body, and enabling the flexible display panel to face the attaching surface of the curved cover plate and keep a preset distance from the attaching surface;
filling fluid into the pressing body, and expanding the pressing body to completely contact the flexible display panel with the first adhesive layer and keep the contact state for a preset time T;
and curing the first adhesive layer to bond the flexible display panel and the curved cover plate into a whole.
2. The method for manufacturing a curved display screen according to claim 1, wherein the first adhesive layer has a viscosity of μ 1, and the profiling surface has a viscosity of μ 2;
the carrying of the flexible display panel on the contour surface of the press-fit body and the facing of the flexible display panel to the curved cover plate and the keeping of the preset distance between the facing surfaces specifically include:
attaching the flexible display panel to the profiling surface to form an attaching body, and moving the attaching body towards one side of the attaching surface of the curved surface cover plate to enable the flexible display panel and the attaching surface of the curved surface cover plate to keep a preset distance;
wherein the viscosity mu 1 of the first adhesive layer and the viscosity mu 2 of the profiling surface meet the condition:
μ1＞μ2。
3. the method for manufacturing the curved display screen according to claim 2, wherein the viscosity μ 1 of the first adhesive layer satisfies the condition:
0cP＜μ1＜100cP。
4. the method for manufacturing a curved display screen according to claim 2, wherein before the attaching the flexible display panel to the curved surface to form an attached body and moving the attached body toward the attaching surface side of the curved cover plate, the method further includes:
and filling a part of fluid into the press fit body to ensure that the flexible display panel attached to the profiling surface is conformal with the attaching surface of the curved cover plate.
5. The method for manufacturing a curved display screen according to claim 1, wherein the method for manufacturing a curved display screen further comprises:
and spraying an aqueous adhesive on the binding surface of the curved surface cover plate and carrying out pre-curing treatment to form the first adhesive layer.
6. The method for manufacturing a curved display screen according to claim 5, wherein the thickness of the first adhesive layer is less than or equal to 30 μm.
7. The method for manufacturing the curved display screen according to claim 5, wherein the step of spraying the adhesive on the bonding surface of the curved cover plate and performing the pre-curing treatment specifically comprises:
and spraying an aqueous adhesive on the binding surface of the curved cover plate and carrying out photocuring treatment.
8. The method of any one of claims 1 to 7, wherein the fluid comprises one or more of water, oil and gas.
9. The method for manufacturing the curved surface display screen according to any one of claims 1 to 7, wherein the preset time length T satisfies a condition:
t is more than 0 and less than 10 seconds.
10. A curved display screen, comprising:
one side of the curved surface cover plate is provided with a binding surface; and
the flexible display panel is attached to the attaching surface of the curved cover plate;
the curved display screen is manufactured by the method according to any one of claims 1 to 9, and the flexible display panel is attached to the curved cover plate.
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Application publication date: 20210831 |