CN112470447A - Flexible display screen cover plate, preparation method thereof and display screen - Google Patents
Flexible display screen cover plate, preparation method thereof and display screen Download PDFInfo
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- CN112470447A CN112470447A CN201880093886.5A CN201880093886A CN112470447A CN 112470447 A CN112470447 A CN 112470447A CN 201880093886 A CN201880093886 A CN 201880093886A CN 112470447 A CN112470447 A CN 112470447A
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- flexible
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- display screen
- flexible display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
Abstract
The invention provides a flexible display screen cover plate, a preparation method thereof and a display screen. The flexible display screen cover plate comprises a flexible base material, an adhesive layer and a hard coating. The glue layer is formed on the flexible substrate. The adhesive layer contains an ultraviolet absorbent. The hard coating layer is formed on one side of the glue layer far away from the flexible substrate. According to the flexible display screen cover plate, the preparation method thereof and the display screen, the glue layer containing the ultraviolet absorbent is additionally arranged between the hard coating and the flexible base material, so that the yellowing resistance and the bending resistance of the flexible display screen cover plate are improved.
Description
The invention relates to the technical field of display, in particular to a flexible display screen cover plate, a preparation method of the flexible display screen cover plate and a display screen.
The flexible display screen cover plate is used as one of main components of the display screen and is arranged at the outermost part of the display screen. The existing flexible display screen cover plate usually adopts a flexible base material as a substrate, so that the flexible display screen cover plate has better bending resistance. However, after the ultraviolet light is irradiated, the molecular structure of the substrate of the flexible display screen cover plate is easily changed, so that the flexible display screen cover plate is yellow, and the appearance and the display effect of the display screen are affected.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides an anti-yellowing flexible display cover and a method for manufacturing the same.
In addition, the invention also provides a display screen applying the flexible display screen cover plate.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
in a first aspect, the present invention provides a flexible display cover, comprising:
a flexible substrate;
a glue layer formed on the flexible substrate, the glue layer comprising an ultraviolet absorber; and
and the hard coating is formed on one side of the glue layer far away from the flexible substrate.
In a second aspect, the present invention further provides a method for manufacturing a flexible display cover plate, including the following steps:
providing a flexible substrate;
forming a glue layer on the flexible substrate, wherein the glue layer contains an ultraviolet absorbent; and
and forming a hard coating on the side of the glue layer far away from the flexible substrate.
In a third aspect, the invention further provides a display screen, which comprises the flexible display screen cover plate.
According to the flexible display screen cover plate, the preparation method thereof and the display screen, the glue layer containing the ultraviolet absorbent is additionally arranged between the hard coating and the flexible base material, so that the yellowing resistance and the bending resistance of the flexible display screen cover plate are improved.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible display screen cover according to an embodiment of the present invention.
Fig. 2 is a flowchart of a method for manufacturing the flexible display cover of fig. 1.
Fig. 3 is a stress distribution diagram of the flexible display cover of fig. 1 in a bent state.
Fig. 4 is a schematic structural diagram of a display screen according to an embodiment of the present invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Further, the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, elements, components, and/or groups thereof. The following description is of the preferred embodiment for carrying out the invention, and is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
Fig. 1 is a schematic diagram illustrating a flexible display panel according to an embodiment of the present invention. The flexible display cover 100 includes a flexible substrate 10, a glue layer 20, and a hard coating layer 30. The glue layer 20 is formed on the flexible substrate 10. The glue layer 20 contains an ultraviolet absorber. The hard coating layer 30 is formed on the side of the glue layer 20 away from the flexible substrate 10.
The flexible substrate 10 is made of a transparent material. The flexible substrate 10 is, for example, but not limited to, one of a Polyimide (PI) substrate, a Colorless transparent Polyimide (CPI) substrate, a polyethylene terephthalate (PET) substrate, a Polyamide (PA) substrate, a Polycarbonate (PC) substrate, a Polyethersulfone (PES) substrate, a polyethylene naphthalate (PEN) substrate, a polymethyl methacrylate (PMMA) substrate, a cycloolefin copolymer (COC) substrate, and a cycloolefin polymer (COP) substrate.
In this embodiment, the flexible substrate 10 has a flat attaching surface 11, and the adhesive layer 20 covers the attaching surface 11 of the flexible substrate 10 to prevent the ultraviolet light from irradiating the flexible substrate 10. It can be understood that, in other embodiments, the flexible substrate 10 has an uneven attaching surface, so that the internal stress generated when the flexible display screen cover 100 is bent can be effectively reduced, and therefore, no fault layer occurs, the service life of the flexible display screen cover 100 is prolonged, and the glue layer 20 can be more firmly adhered to the flexible substrate 10.
As can be understood, because the glue layer 20 contains the ultraviolet absorbent, the problem of yellowing caused by the change of the molecular structure due to the irradiation of ultraviolet light to the flexible substrate 10 can be avoided, so that the yellowing resistance of the flexible display panel cover plate 100 is improved, and the appearance and display effect of the flexible display panel cover plate 100 are improved. The ultraviolet absorber is, for example, but not limited to, one or a combination of a salicylate compound, a benzophenone compound, a benzotriazole compound, a substituted acrylonitrile compound, or a triazine compound.
As can be understood, since the glue layer material is formed by doping an organic heterocyclic compound such as hydroxybenzotriazine, the chemical bond of the organic heterocyclic compound changes from a ground state (low energy level) to a non-ground state (high energy level) and generates ions after being irradiated by ultraviolet light, and the process is a reversible chemical change; finally, the organic heterocyclic compound of the hydroxyphenyltriazine can fully absorb ultraviolet light, so that the ultraviolet light is prevented from irradiating the flexible base material 10, and the flexible base material 10 can avoid the problem of yellowing caused by the change of a molecular structure due to the absorption of the ultraviolet light.
Preferably, in this embodiment, the ultraviolet absorber includes a triazine compound. Triazine compounds are, for example, but not limited to, 2, 4, 6-tris (2 '4' -dihydroxyphenyl) -1, 3, 5-triazine, 2, 4, 6-tris (2 '-hydroxy-4' -n-butoxyphenyl) or a combination thereof.
The glue layer 20 further includes a glue material with adhesive property. The colloid material is selected from various existing adhesive glues, and is not limited herein. Specifically, in the present embodiment, the colloid material of the adhesive layer 20 is, for example, an optical adhesive, a pressure-sensitive adhesive, or an adhesive. Further, the adhesive layer 20 may further include, for example, but not limited to, one or a combination of acrylate compounds, polyurethane compounds, silicone compounds, or rubber compounds, so as to adhere the adhesive layer 20 to the flexible substrate 10.
In the present embodiment, the thickness of the glue layer 20 is approximately 0.025mm to 0.3 mm. In this embodiment, the uv absorber is 0.1-20% by weight of the adhesive layer 20.
Further, the glue layer 20 further includes glass beads dispersed in the colloidal material. When the ultraviolet light passes through the colloid material, the ultraviolet light can be reflected for multiple times by the glass beads in the colloid material, so that the propagation path of the ultraviolet light in the colloid material is changed and prolonged, and the ultraviolet light can be fully absorbed by the ultraviolet absorbent in the colloid material, so that the transmittance of the ultraviolet laser is reduced, and the problem of yellowing caused by the change of the molecular structure of the flexible substrate due to ultraviolet irradiation is avoided. Wherein, the glass beads are made of reflecting materials or the surfaces of the glass beads are coated with the reflecting materials. The reflective material is, for example, but not limited to, silver, aluminum, or other metallic material.
It is understood that the material of the hard coating layer 30 is different from the material of the glue layer 20, so that the glue layer 20 can absorb the stress of the hard coating layer 30 in the bent state, and the hardness and the abrasion resistance and scratch resistance of the flexible display cover 100 are improved. In the present embodiment, the dielectric constant of the hard coating layer 30 is different from the dielectric constant of the glue layer 20. The stress absorption by the adhesive layer 20 reduces the stress of the hard coat layer 30 and reduces the transmittance of ultraviolet rays. In the present embodiment, the hard coat layer 30 is made of a transparent material. The hard coat layer 30 includes organic compounds such as acrylates and polyethylene terephthalate, and inorganic compounds such as titanium nitride, aluminum titanium carbonitride, and tungsten sulfide.
It can be understood that the smaller the thickness of the hard coating layer 30, the better the bending resistance of the flexible display screen cover 100, however, the smaller the thickness of the hard coating layer, the poorer the hardness, abrasion resistance and scratch resistance of the flexible display screen cover 100. Therefore, in order to ensure a balance among the bending resistance, the hardness, and the scratch resistance of the flexible display cover 100, the thickness of the hard coating layer 30 is approximately 5 μm to 50 μm.
Fig. 2 is a flowchart of a method for manufacturing a flexible display cover according to an embodiment of the present invention. The preparation method of the flexible display screen cover plate 100 comprises the following steps:
s201, providing a flexible base material;
s203, forming a glue layer on the flexible base material, wherein the glue layer contains an ultraviolet absorbent; and
and S205, forming a hard coating on one side of the glue layer away from the flexible substrate.
Referring to fig. 1 and fig. 2, in one embodiment, a glue layer 20 is formed on a flexible substrate 10, which includes:
preparing liquid glue containing ultraviolet absorbent;
the liquid glue is coated on the flexible substrate 10 and cured to attach the glue layer 20 to the flexible substrate 10.
The mixed solution is uniformly coated on the binding surface 11 of the flexible substrate 10, so that the prepared adhesive layer 20 covers the flexible substrate 10, and the adhesive layer 20 can absorb ultraviolet light, thereby avoiding the problem that the ultraviolet light irradiates the flexible substrate 10 to cause the change of the molecular structure and cause yellowing, and further improving the yellowing resistance of the flexible display screen cover plate 100. The ultraviolet absorber is, for example, but not limited to, one or a combination of a salicylate-based compound, a benzophenone-based compound, a benzotriazole-based compound, a substituted acrylonitrile-based compound, or a triazine-based compound.
Preferably, in this embodiment, the ultraviolet absorber includes a triazine compound. Triazine compounds are, for example, but not limited to, 2, 4, 6-tris (2 '4' -dihydroxyphenyl) -1, 3, 5-triazine, 2, 4, 6-tris (2 '-hydroxy-4' -n-butoxyphenyl) or a combination thereof.
The mixed solution also comprises a colloid material and glass beads. The glass beads are made of a reflective material or the surfaces of the glass beads are coated with a reflective material. The reflective material is, for example, but not limited to, silver, aluminum, or other metallic material. The colloid material is a colloid material with adhesive property. The colloid material is selected from various existing adhesive glues, and is not limited herein. Specifically, in the present embodiment, the colloid material of the adhesive layer 20 is, for example, an optical adhesive, a pressure-sensitive adhesive, or an adhesive. Further, the adhesive layer 20 may further include, for example, but not limited to, one or a combination of acrylate compounds, polyurethane compounds, silicone compounds, or rubber compounds, so as to adhere the adhesive layer 20 to the flexible substrate 10.
In another embodiment, the forming of the glue layer 20 on the flexible substrate 10 specifically includes:
preparing a solid glue layer 20 containing an ultraviolet absorbent in advance;
the adhesive layer 20 is laminated on the flexible substrate 10 and then bonded thereto by applying pressure and heat, so that the adhesive layer 20 is attached to the flexible substrate 10.
The adhesive layer 20 covers the attachment surface 11 of the flexible substrate 10 to prevent ultraviolet light from irradiating. The hard coating layer 30 may also be formed on the adhesive layer 20 by coating or attaching to make the flexible display cover 100.
It is understood that the material composition, structure and dosage ratio of the flexible substrate 10, the adhesive layer 20 and the hard coating layer 30 can be referred to the structural description of the flexible display cover 100 in the above embodiments, and are not described herein again.
Referring to fig. 3, a stress distribution diagram of a flexible display cover in a bent state according to an embodiment of the present invention is provided. As shown in fig. 3, the flexible display cover 100 has a bending section 101 and a non-bending section 102. When the flexible display panel cover 100 is in a bent state, the bending section 101 is stressed most. It is understood that in the present embodiment, the adhesive layer 20 is a viscoelastic body, i.e., the adhesive layer 20 has viscosity and elasticity. The stress of the bending section 101 can be effectively absorbed by the glue layer 20. Further, the reduction of the stress borne by the hard coating layer 30 at the bending section 101 may correspondingly improve the bending resistance of the hard coating layer 30, so that the glue layer 20 is disposed between the flexible substrate 10 and the hard coating layer 30, so as to absorb the stress of the flexible substrate 10 and the hard coating layer 30, thereby improving the bending resistance of the hard coating layer 30.
Please refer to fig. 4, which is a schematic structural diagram of a display screen according to an embodiment of the present invention. The display screen 1000 includes the flexible display screen cover 100 and the touch assembly 200 described above. The flexible display cover 100 is formed over the touch assembly 200.
In the present embodiment, the display screen 1000 is, for example, a flexible touch screen or a flexible display screen. Examples of the flexible Display screen include, but are not limited to, products or components having a Display function, such as a Liquid Crystal Display (LCD) panel, a Quantum Dot Display (QLED) panel, an electronic paper (E-paper Display, EPD), a Touch screen (Touch panel), a flexible solar cell (PV) panel, and a Radio Frequency tag (Radio Frequency Identification, RFID).
According to the flexible display screen cover plate, the preparation method thereof and the display screen, the glue layer containing the ultraviolet absorbent is additionally arranged between the hard coating and the flexible base material, so that the yellowing resistance and the bending resistance of the flexible display screen cover plate are improved.
The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the principle of the above-described embodiments should be included in the protection scope of the technical solution.
Claims (15)
- A flexible display screen cover, comprising:a flexible substrate;a glue layer formed on the flexible substrate, the glue layer comprising an ultraviolet absorber; andand the hard coating is formed on one side of the glue layer far away from the flexible substrate.
- The flexible display cover sheet of claim 1, wherein the ultraviolet absorber comprises one or a combination of a salicylate-based compound, a benzophenone-based compound, a benzotriazole-based compound, a substituted acrylonitrile-based compound, or a triazine-based compound.
- The flexible display cover sheet of claim 2 wherein the triazine compound comprises one or a combination of 2, 4, 6-tris (2 '4' -dihydroxyphenyl) -1, 3, 5-triazine, 2, 4, 6-tris (2 '-hydroxy-4' -n-butoxyphenyl).
- The flexible display cover of claim 1, wherein the adhesive layer material is an optical adhesive, a pressure sensitive adhesive, or an adhesive.
- The cover of claim 1, wherein the adhesive layer further comprises one or a combination of acrylate compounds, polyurethane compounds, silica gel compounds, and rubber compounds.
- The flexible display cover sheet of claim 1, wherein the flexible substrate is a polyimide substrate, a colorless transparent polyimide substrate, a polyethylene terephthalate substrate, a polyamide substrate, a polycarbonate substrate, a polyphenylene ether sulfone substrate, a polyethylene naphthalate substrate, a polymethyl methacrylate substrate, a cyclic olefin copolymer substrate, or a cyclic olefin polymer substrate.
- The flexible display cover of claim 1, wherein the glue layer has a thickness of 0.025mm to 0.3 mm.
- The flexible display cover sheet of claim 1, wherein the hard coating has a thickness of 5 μ ι η to 50 μ ι η.
- The flexible display cover of claim 1, wherein the dielectric constant of the glue layer is different from the dielectric constant of the hard coat layer.
- A preparation method of a flexible display screen cover plate comprises the following steps:providing a flexible substrate;forming a glue layer on the flexible substrate, wherein the glue layer contains an ultraviolet absorbent; andand forming a hard coating on the side of the glue layer far away from the flexible substrate.
- The method for manufacturing a cover plate of a flexible display screen according to claim 10, wherein forming a glue layer on the flexible substrate specifically comprises:preparing liquid glue containing the ultraviolet absorbent;and coating the liquid glue on the flexible substrate, and curing to form the glue layer on the flexible substrate.
- The method for manufacturing a cover plate of a flexible display screen according to claim 10, wherein forming a glue layer on the flexible substrate specifically comprises:preparing the solid glue layer containing the ultraviolet absorbent in advance;and laminating and attaching the adhesive layer and the flexible base material to attach the adhesive layer to the flexible base material.
- The method for manufacturing a flexible display screen cover plate according to claim 10, wherein the ultraviolet absorber comprises one or a combination of a salicylate-based compound, a benzophenone-based compound, a benzotriazole-based compound, a substituted acrylonitrile-based compound or a triazine-based compound.
- The method for preparing a flexible display screen cover plate according to claim 10, wherein the triazine compound comprises one or a combination of 2, 4, 6-tris (2 '4' -dihydroxyphenyl) -1, 3, 5-triazine and 2, 4, 6-tris (2 '-hydroxy-4' -n-butoxyphenyl).
- A display screen comprising a flexible screen cover as claimed in any one of claims 1 to 9.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/090873 WO2019237254A1 (en) | 2018-06-12 | 2018-06-12 | Flexible display screen cover plate and preparation method therefor, and display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112470447A true CN112470447A (en) | 2021-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201880093886.5A Pending CN112470447A (en) | 2018-06-12 | 2018-06-12 | Flexible display screen cover plate, preparation method thereof and display screen |
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| Country | Link |
|---|---|
| CN (1) | CN112470447A (en) |
| WO (1) | WO2019237254A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113035067A (en) * | 2021-03-11 | 2021-06-25 | 京东方科技集团股份有限公司 | Flexible film and display device |
| CN114774019A (en) * | 2022-04-24 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Display screen cover plate and display device |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP7097959B2 (en) | 2017-10-27 | 2022-07-08 | アプライド マテリアルズ インコーポレイテッド | Flexible cover lens film |
| US11579339B2 (en) | 2018-05-10 | 2023-02-14 | Applied Materials, Inc. | Replaceable cover lens for flexible display |
| JP7404407B2 (en) | 2019-06-26 | 2023-12-25 | アプライド マテリアルズ インコーポレイテッド | Flexible multilayer cover lens laminate for foldable display |
| CN111136960A (en) * | 2019-12-27 | 2020-05-12 | 武汉华星光电半导体显示技术有限公司 | Cover plate and display device |
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| US6664950B1 (en) * | 1999-11-17 | 2003-12-16 | L-3 Communications | Resistive touch panel using removable, tensioned top layer |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019237254A1 (en) | 2019-12-19 |
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Application publication date: 20210309 |