WO2020037543A1 - 光学胶及其制备方法、显示面板 - Google Patents

光学胶及其制备方法、显示面板 Download PDF

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Publication number
WO2020037543A1
WO2020037543A1 PCT/CN2018/101721 CN2018101721W WO2020037543A1 WO 2020037543 A1 WO2020037543 A1 WO 2020037543A1 CN 2018101721 W CN2018101721 W CN 2018101721W WO 2020037543 A1 WO2020037543 A1 WO 2020037543A1
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WIPO (PCT)
Prior art keywords
layer
base film
adhesive layer
adhesive
optical
Prior art date
Application number
PCT/CN2018/101721
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English (en)
French (fr)
Inventor
温胜山
Original Assignee
深圳市柔宇科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201880094167.5A priority Critical patent/CN113329877A/zh
Priority to PCT/CN2018/101721 priority patent/WO2020037543A1/zh
Publication of WO2020037543A1 publication Critical patent/WO2020037543A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the invention belongs to the field of display technology, and particularly relates to an optical adhesive, a preparation method thereof, and a display panel.
  • the present invention provides an optical glue that can be used for blocking devices or blocking light. Specific technical solutions are as follows.
  • An optical glue includes:
  • a first adhesive layer the first adhesive layer being disposed on the base film and covering the ink layer.
  • the base film includes a first ink area and a second ink area, the first ink area and the second ink area are disposed at two ends of the base film at intervals, and the ink layer is disposed at the The first ink region and the second ink region.
  • the optical glue further includes:
  • a second adhesive layer is disposed on a surface of the base film remote from the ink layer.
  • the first adhesive layer is a viscosity-reducing adhesive.
  • the viscosity-reducing condition includes ultraviolet light irradiation. , At least one of infrared light irradiation, laser light irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating.
  • the first adhesive layer includes a photoinitiator.
  • the photoinitiator can cause molecules in the first adhesive layer to decompose to reduce the The interfacial adhesion of the first adhesive layer is described.
  • the first adhesive layer includes a gas initiator.
  • the gas initiator can be cracked to generate a gas to reduce the interfacial adhesion of the first adhesive layer. .
  • the second adhesive layer is a viscosity-reducing adhesive.
  • the interface adhesive force of the second adhesive layer is reduced.
  • the viscosity-reducing condition includes ultraviolet light irradiation. , At least one of infrared light irradiation, laser light irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating.
  • a surface of the first adhesive layer far from the base film is flat.
  • the optical glue further includes:
  • a first release film the first release film being disposed on a surface of the first adhesive layer away from the base film;
  • the optical glue further includes:
  • a second release film which is disposed on a surface of the second optical glue away from the base film.
  • the adhesion force of the second release film to the second adhesive layer is different from the adhesion force of the first release film to the first adhesive layer.
  • the present invention also provides a display panel including the optical glue according to any one of the above.
  • the display panel further includes a cover plate, and the cover plate is disposed on a surface of the first adhesive layer in the optical adhesive away from the base film.
  • the cover plate includes a cover plate base film and a hardened layer disposed in a stacked manner, and the cover plate base film is disposed on a surface of the first adhesive layer remote from the base film.
  • the display panel includes a touch layer, and the touch layer is disposed in the base film in the optical glue.
  • the display panel includes:
  • a polarizer disposed on a side of the optical glue away from the cover plate
  • An organic electroluminescence display layer the organic electroluminescence display layer being disposed on a side of the polarizer away from the optical glue;
  • a thin film transistor layer disposed on a side of the organic electroluminescence display layer away from the polarizer;
  • a support film is disposed on a side of the thin film transistor layer facing away from the organic electroluminescence display layer.
  • the present invention also provides a method for preparing an optical glue.
  • the method for preparing the optical glue includes:
  • a first glue layer is formed on the base film, and the first glue layer covers the ink layer.
  • the method for preparing the optical adhesive further includes:
  • the base film is turned over, and a second glue layer is formed on a surface of the base film away from the first glue layer.
  • a first adhesive layer is formed on said base film, and said first adhesive layer covers said ink layer” and “flip base film, and the base film is far away from said Forming a second adhesive layer on the surface of the ink layer "further includes:
  • a second release film is formed on a surface of the second adhesive layer remote from the base film.
  • the present invention also provides a method for preparing an optical glue.
  • the method for preparing the optical glue includes:
  • a first adhesive layer is formed on the base film away from the second adhesive layer, and the first adhesive layer covers the ink layer.
  • the method for preparing an optical adhesive "forming a second adhesive layer on the base film” and “reversing the base film, forming an ink layer on a surface of the base film away from the second adhesive layer, and The area of the ink layer is smaller than the area of the base film "further includes:
  • the method further includes:
  • a first release film is formed on a surface of the first adhesive layer away from the base film.
  • the optical adhesive provided by the present invention can also be used to block the device or light-shielding when the device or film layer is bonded, and the ink layer is directly disposed between the optical adhesive and the base film to form an ink
  • the ink segment difference filling ability between the layer and the optical glue is stronger than the ink segment difference filling ability between the ink layer formed by using the optical glue layer for bonding the ink layer on the cover plate and the optical glue.
  • FIG. 1 is a schematic structural diagram of an optical adhesive according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another optical adhesive provided by the first embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of an ink region of an optical adhesive according to a first embodiment of the present invention
  • FIG. 4 is a schematic structural diagram of an optical adhesive provided by a second embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of an optical adhesive according to a third embodiment of the present invention.
  • 6a and 6b are schematic diagrams of a first adhesive layer provided by the present invention before and after decomposition under ultraviolet light;
  • FIG. 7 is a schematic structural diagram of an optical adhesive provided by a fourth embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a display panel provided by the present invention.
  • FIG. 9 is a schematic structural diagram of an ink layer provided on a cover plate
  • FIG. 10 is a schematic structural diagram of another display panel provided by the present invention.
  • FIG. 11 is a flowchart of a method for preparing an optical adhesive provided by the present invention.
  • FIG. 12 is a flowchart of another method for preparing an optical adhesive provided by the present invention.
  • an embodiment herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention.
  • the appearances of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
  • a first embodiment of the present invention provides an optical adhesive 10.
  • the optical adhesive 10 includes a base film 100, an ink layer 200, and a first adhesive layer 300.
  • the ink layer 200 is disposed on a surface of the base film 100, and the ink The area of the layer 200 is smaller than that of the base film 100.
  • the first adhesive layer 300 is disposed on the base film 100 and covers the ink layer 200.
  • the optical adhesive 10 is used for bonding devices or film layers, and can also be used for light shielding, shielding devices or marking devices that require an ink layer, and the ink layer 200 is disposed between the base film 100 and the optical adhesive layer 300
  • the first optical adhesive 300 can completely absorb the ink segment difference of the ink layer 200. It can be understood that, when preparing, a fluid optical adhesive layer material is coated or printed on the base film 100 and covers the ink layer 200. The fluid optical adhesive layer material can be more closely attached to the ink layer 200 and filled. This ink segment is poor.
  • a surface 310 of the first adhesive layer 300 away from the base film 100 is planar.
  • the first optical adhesive 300 and the cover plate in the electronic display device are adhered, so that the first optical adhesive 300 and the cover plate are completely adhered to each other.
  • it is ensured that the interface between the first optical adhesive 300 and the cover plate does not peel off during the bending process after the close bonding.
  • a fluid optical adhesive layer material is coated or printed on the base film 100 and covers the ink layer 200. The fluid optical adhesive layer material is cured to form a semi-solid optical with a sticky surface. gum.
  • the material of the base film 100 includes, but is not limited to, polyethylene terephthalate (PET), colorless polyimide (polyimide), and polymethyl methacrylate (PMMA). ).
  • PET polyethylene terephthalate
  • PMMA polymethyl methacrylate
  • the material of the base film 100 and the material of the ink layer 200 have better adsorption force, so that the ink layer 200 is better printed on the base film 100.
  • the thickness of the base film 100 is less than or equal to 25 ⁇ m, to ensure that the base film 100 occupies less thickness ratio of the entire optical adhesive 10 and has higher bending characteristics.
  • the base film 100 includes a first ink region 110 and a second ink region 120.
  • the first ink region 110 and the second ink region 120 are disposed at two ends of the base film 100 at intervals, and the ink layer 200 is disposed at the first Inside an ink region 110 and a second ink region 120.
  • the ink region 130 of the base film 100 may be arranged around the periphery of the base film 100 (see FIG. 3), where the ink region 130 refers to the ink layer 200. your region.
  • the ink region 130 may also be patterned according to different appearance requirements, sizes, etc., and may be adjusted according to the actual application of the optical adhesive 10. It can be understood that the ink patterning includes, but is not limited to, rectangles, diamonds, circles, triangles, and the like.
  • a second embodiment of the present invention provides an optical adhesive 10 a.
  • the optical adhesive 10 a further includes a second adhesive layer 500.
  • the second adhesive layer 500 is disposed on a surface of the base film 100 away from the ink layer 200.
  • the optical adhesive 10a in this embodiment is provided with a first adhesive layer 300 and a second adhesive layer 500 on the upper and lower sides, respectively.
  • the first adhesive layer 300 is used for bonding one side thereof, and the second adhesive layer 500 is used for bonding the other side.
  • both the upper and lower sides of the optical glue 10a can be used for bonding devices or film layers.
  • the first adhesive layer 300 is used for bonding a cover plate
  • the second adhesive layer 500 is used for bonding a polarizer in the flexible electronic display device.
  • the thickness of the first adhesive layer 300 and the second adhesive layer 500 is controlled to be less than 100 ⁇ m, and the thickness is preferably controlled to be less than 50 ⁇ m to ensure that the optical adhesive layer is thinned and has better bending characteristics.
  • the components of the first adhesive layer 300 and the second adhesive layer 500 include, but are not limited to, at least one of an acrylic compound, a silica gel compound, a rubber compound, and a polyurethane compound.
  • the first adhesive layer 300 is a viscosity-reducing adhesive.
  • the viscosity-reducing conditions include ultraviolet light irradiation, At least one of infrared light irradiation, laser light irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating.
  • Interfacial adhesion refers to the adhesion between the adhesive layer and the interface.
  • the first adhesive layer 300 when used to bond the cover plate, a problem occurs in the cover plate.
  • the first adhesive layer 300 is subjected to a viscosity reduction treatment to reduce the adhesive force, and the cover plate can be peeled off to facilitate heavy work.
  • the adhesive force of the first adhesive layer 300 can be reduced below 100 g / inch.
  • the first adhesive layer 300 When the viscosity reduction condition is applied, the first adhesive layer 300 is placed in a light field (such as ultraviolet light / infrared light / laser irradiation), and external energy acts on the first adhesive layer 300, causing the molecular structure of the first adhesive layer 300 to occur.
  • a light field such as ultraviolet light / infrared light / laser irradiation
  • the change causes the interface adhesive force to be adhered to the target device or film layer to be reduced; or the first adhesive layer 300 is placed in an electric field (current and voltage are applied and electricity generates heat), and the first adhesive layer 300 absorbs a certain amount of energy, causing the first The adhesive force at the interface where the adhesive layer 300 adheres to the target device or the film layer is reduced; or the first adhesive layer 300 is placed in a magnetic field (applying a magnetic field to convert the magnetic field into an electric field, which generates heat), and the first adhesive layer 300 absorbs A certain amount of energy causes the interface adhesive force of the first adhesive layer 300 to adhere to the target device or film layer to decrease; or a force field, for example, the first adhesive layer 300 is made of a viscous piezoelectric material and exerts force on the When the piezoelectric material is described, the piezoelectric material generates a voltage, which is equivalent to applying an electric field to the first adhesive layer 300.
  • the first adhesive layer 300 absorbs a certain amount of energy, which causes the first adhesive layer 300 to adhere to the target device or film layer. Interface adhesion decreases; or, Heating an adhesive layer 300, a first adhesive layer 300 must absorb energy, resulting in the first adhesive layer 300 adheres to the interface adhesion layer on the target device or decreased.
  • a third embodiment of the present invention provides an optical adhesive 10b.
  • the first adhesive layer 300 includes a photoinitiator 310.
  • the photo initiator can cause molecules in the first adhesive layer 300 to decompose to reduce the interfacial adhesion of the first adhesive layer 300.
  • FIG. 6a before decomposition
  • FIG. 6b after decomposition
  • the first adhesive layer 300 is composed of a polyacrylic compound material.
  • the photoinitiator 310 is irradiated with ultraviolet light, molecular decomposition of the polyacrylic compound is caused. Pyrolysis into small molecular substances, which reduces the interface molecular force and achieves the purpose of reducing peel strength.
  • a fourth embodiment of the present invention provides an optical adhesive 10c.
  • the first adhesive layer 300 includes a gas initiator 320.
  • the gas initiator 320 can be cracked to generate a gas to reduce the interfacial adhesion of the first adhesive layer 300.
  • the first adhesive layer 300 includes a polyurethane-based compound, nitrogen gas is generated under the irradiation of ultraviolet light. During the nitrogen generation process, the first adhesive layer 300 is separated from the bonding interface, which greatly reduces the peel strength.
  • the second adhesive layer 500 is a viscosity-reducing adhesive.
  • the viscosity-reducing conditions include ultraviolet light irradiation, At least one of infrared light irradiation, laser light irradiation, applied electric field, applied force field, applied magnetic field, low temperature, and heating.
  • the viscosity reduction property ensures that the target device or film layer to be bonded to the second adhesive layer 500 is reworked.
  • the optical adhesive 10 may be one or both of the first adhesive layer 300 or the second optical adhesive 500 as a viscosity-reducing adhesive as required.
  • optical adhesive properties of the first adhesive layer 300 and the second adhesive layer 500 can also be set with different functions according to requirements.
  • the properties of the optical adhesive include, but are not limited to, peeling force, low water vapor transmission rate, high / low dielectric constant, and bending property. Wait.
  • the optical adhesive 10 a further includes a first release film 400.
  • the first release film 400 is disposed on a surface of the first adhesive layer 300 away from the base film 100.
  • the first release film 400 is used to protect the first adhesive layer 300.
  • the first release film 400 includes at least one of a PE (polyethylene) release film, a PET release film, an OPP (polypropylene) release film, and a composite release film.
  • the first release film 400 is composed of two or more materials of PE, PET, and OPP.
  • the optical adhesive 10 a further includes a second release film 600, and the second release film 600 is disposed on a surface of the second optical adhesive 500 away from the base film 100.
  • the second release film 600 is used to protect the second optical adhesive 500.
  • the adhesive force of the second release film 600 to the second adhesive layer 500 is different from the adhesive force of the first release film 400 to the first adhesive layer 300. In other words, it is ensured that one side of the release film is peeled off first, and the other side of the release film is peeled off later.
  • the optical adhesive 10a of this embodiment can be used to first peel off the first release film 400, and the first adhesive layer 300 precedes the second adhesive.
  • the layer 500 bonds the target device or film layer.
  • the adhesive force of the second release film 600 to the second adhesive layer 500 is then The adhesion force of the first release film 400 to the first adhesive layer 300 is smaller than that of the first release film 400.
  • the adhesive layer corresponding to the release film that is easier to peel off is used to adhere the target device first.
  • the present invention further provides a display panel 20.
  • the display panel 20 includes the optical adhesive 10 according to any one of the above embodiments. It can be understood that, for the release film for protecting the optical adhesive layer, when the optical adhesive 10 is used for the display panel 20, the first release film 400 and the second release film 600 are peeled off, and then the optical adhesive 10 is peeled off. Bonded in the display panel 20.
  • the display panel 20 further includes a cover plate 210, which is disposed on a surface of the first adhesive layer 300 in the optical adhesive 10 away from the base film 100.
  • the cover 210 does not include an ink layer.
  • the ink layer 200 in the optical glue 10 provided in this embodiment is used to block light at the border of the display panel 20 or other film layers and devices under the cover plate 210.
  • a layer of conventional optical adhesive 11 covers the ink layer 200 and bonds the cover plate 210, the cover plate in FIG.
  • the first adhesive layer of the optical adhesive 10 provided in the embodiment of the present invention covers the ink layer to form a flat surface when in a liquid state, so that the first adhesive layer and the cover plate 210 are in planar contact and do not exist. The problem of step differences.
  • the cover plate 210 includes a cover substrate film 211 and a hardened layer 212 which are disposed in a stacked manner, and the cover substrate film 211 is disposed on a surface of the first adhesive layer 300 away from the base film 100 .
  • the hardening layer 212 is used to enhance the strength of the cover plate 210 and protect devices under the cover plate 210.
  • the display panel 20 includes a touch layer 220, and the touch layer 220 is disposed in the base film 100 in the optical adhesive 10. Disposing the touch layer 200 in the base film 100 can reduce the thickness of the display panel 20.
  • the display panel 20 includes a polarizer 230, an organic electroluminescent display layer 240, a thin film transistor layer 250, and a support film 260.
  • the polarizer 230 is disposed on the side of the optical glue 10 away from the cover plate 210, and the organic electroluminescence display layer 240 is disposed on the side of the polarizer 230 away from the optical glue 10.
  • the polarizer 230 is used to emit the organic electroluminescent device 240 The light is filtered to form polarized light.
  • the thin film transistor layer 250 is disposed on a side of the organic electroluminescent display layer 240 away from the polarizer 230, and the support film 260 is disposed on a side of the thin film transistor layer 250 facing away from the organic electroluminescent display layer 240.
  • the present invention further provides a method for preparing an optical adhesive 10.
  • the method for preparing the optical adhesive 10 includes steps S100, S200, and S300. The detailed steps are described below.
  • a base film 100 is provided.
  • the material of the base film 100 includes, but is not limited to, one of polyethylene terephthalate, polyimide, and polymethyl methacrylate. Preferably, two or more are used.
  • step S200 an ink layer 200 is formed on the base film 100, and the area of the ink layer 200 is smaller than the area of the base film 100.
  • the ink layers 200 of different sizes / thicknesses can be printed on the base film 100 by ink printing technology.
  • a first adhesive layer 300 is formed on the base film 100, and the first adhesive layer 300 covers the ink layer 200.
  • the liquid first adhesive layer 300 material is printed and coated on the base film 100 and covers the ink layer 200.
  • the fluid optical adhesive layer material can be more closely attached to the ink layer 200, and is further away from the base film 100.
  • the surface can be cured into a flat surface, so that the interface adhesive force between the first optical adhesive 300 and the target device or film layer to be bonded is stronger.
  • the method for preparing the optical adhesive 10 further includes step S400 after forming the first adhesive layer 300.
  • step S400 the base film 100 is turned over, and a second glue layer 500 is formed on a surface of the base film 100 away from the first glue layer 300.
  • the thickness of the first adhesive layer 300 and the second adhesive layer 500 is less than or equal to 100 ⁇ m, and the thickness is preferably controlled to be less than 50 ⁇ m to ensure that the optical adhesive layer is thinner and has better bending characteristics.
  • Its components include, but are not limited to, acrylic At least one of a compound, a silica gel-based compound, a rubber-based compound, and a polyurethane-based compound.
  • the method for preparing the optical adhesive 10 includes “forming a first adhesive layer 300 on the base film 100, and covering the ink layer 200 with the first adhesive layer 300” and “reversing the base film 100, leaving the base film 100 away from Step S300a is further included between forming the second adhesive layer 500 "on the surface of the ink layer 200.
  • step S300a a first release film 400 is formed on a surface of the first adhesive layer 300 away from the base film 100.
  • step S500 is further included.
  • step S500 a second release film 600 is formed on a surface of the second adhesive layer 500 away from the base film 100.
  • the present invention also provides another method for preparing the optical adhesive 10, wherein the second adhesive layer 500 is formed before the first adhesive layer 300.
  • the method for preparing the optical adhesive 10 includes steps S100-I, step S200-I, step S300-I, and step S400-I. Details are as follows.
  • step S100-I a base film 100 is provided.
  • step S200-I a second adhesive layer 500 is formed on the base film 100.
  • step S300-I the base film 100 is inverted, and an ink layer 200 is formed on the surface of the base film 100 away from the second adhesive layer 500, and the area of the ink layer 200 is smaller than the area of the base film 100.
  • step S400-I a first adhesive layer 300 is formed on the base film 100 away from the second adhesive layer 500, and the first adhesive layer 300 covers the ink layer 200.
  • the method for preparing the optical adhesive 10 includes forming a second adhesive layer 500 on the base film 100 and flipping the base film 100 to form an ink layer on a surface of the base film 100 away from the second adhesive layer 500. 200, and the area of the ink layer 200 is smaller than the area of the base film 100 "further includes steps S200a-I.
  • a second release film 600 is formed on a surface of the second adhesive layer 500 away from the base film 100.
  • step S500-I is further included.
  • a first release film 400 is formed on a surface of the first adhesive layer 300 away from the base film 100.

Abstract

一种光学胶(10)、显示面板(20)和光学胶的制备方法，所述光学胶(10)包括基底膜(100)、油墨层(200)及第一胶层(300)，所述油墨层(200)设置在所述基底膜(100)的表面上，且所述油墨层(200)的面积小于所述基底膜(100)的面积，所述第一胶层(300)设置在所述基底膜(100)上且覆盖所述油墨层(200)。所述光学胶用于粘结器件或者膜层时还能用于遮挡器件或者遮光，且直接将油墨层设置在光学胶与基底膜之间，所形成油墨层与光学胶之间的油墨段差填充能力，相较于将光学胶层用于粘结盖板上的油墨层而形成的油墨层与光学胶之间的油墨段差填充能力更强。

Description

光学胶及其制备方法、显示面板 技术领域
本发明属于显示技术领域，具体涉及一种光学胶及其制备方法、显示面板。
背景技术
柔性显示屏作为智能设备新一代显示屏幕，是下一代人机交互及万物互联技术和产品。显示屏制备过程中通常需要光学胶粘结上下两层膜层或者器件，显示屏中通常还需要油墨层将需要遮挡的器件挡住或者用于遮光防止漏光，现有的油墨层是设置在盖板的背面，光学胶与具有油墨层的盖板贴合时，光学胶与油墨层之间具有段差从而导致粘结界面贴合不紧密具有空隙，容易产生气泡进而导致显示效果下降，在生产过程中容易剥离脱落，影响产品良率。
发明内容
有鉴于此，本发明提供一种能够用于遮挡器件或者遮光的光学胶。具体技术方案如下。
一种光学胶，所述光学胶包括：
基底膜；
油墨层，所述油墨层设置在所述基底膜的表面上，且所述油墨层的面积小于所述基底膜的面积；
第一胶层，所述第一胶层设置在所述基底膜上且覆盖所述油墨层。
优选的，所述基底膜包括第一油墨区和第二油墨区，所述第一油墨区和所述第二油墨区间隔设置在所述基底膜的两端，所述油墨层设置在所述第一油墨区和所述第二油墨区内。
优选的，所述光学胶还包括：
第二胶层，所述第二胶层设置在所述基底膜远离所述油墨层的表面上。
优选的，所述第一胶层为减粘胶，所述第一胶层在满足减粘条件下时，所述第一胶层的界面粘结力下降，所述减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。
优选的，所述第一胶层中包括光起始剂，当第一胶层在紫外光照射照射下时，所述光起始剂能够引发所述第一胶层中的分子分解以降低所述第一胶层的界面粘结力。
优选的，所述第一胶层中包括气体引发剂，当第一胶层在紫外光照射照射下时，所述气体引发剂能够裂解产生气体以降低所述第一胶层的界面粘结力。
优选的，所述第二胶层为减粘胶，所述第二胶层在满足减粘条件下时，所述第二胶层的界面粘结力下降，所述减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。
优选的，所述第一胶层远离所述基底膜的表面为平面。
优选的，所述光学胶还包括：
第一离型膜，所述第一离型膜设置在所述第一胶层远离所述基底膜的表面上。
优选的，所述光学胶还包括：
第二离型膜，所述第二离型膜设置在所述第二光学胶远离所述基底膜的表面上。
优选的，所述第二离型膜黏附所述第二胶层的粘结力与所述第一离型膜黏附所述第一胶层的粘结力不同。
本发明还提供一种显示面板，所述显示面板包括如上述任一项所述的光学胶。
优选的，所述显示面板还包括盖板，所述盖板设置在所述光学胶中的所述第一胶层远离所述基底膜的表面上。
优选的，所述盖板包括层叠设置的盖板基底膜和硬化层，且所述盖板基底膜设置在所述第一胶层远离所述基底膜的表面上。
优选的，所述显示面板包括触控层，所述触控层设置在所述光学胶中的所述基底膜中。
优选的，所述显示面板包括：
偏光片，所述偏光片设置在所述光学胶远离所述盖板的一侧；
有机电致发光显示层，所述有机电致发光显示层设置在所述偏光片远离所述光学胶的一侧；
薄膜晶体管层，所述薄膜晶体管层设置在所述有机电致发光显示层远离所述偏光片的一侧；
支撑膜，所述支撑膜设置在所述薄膜晶体管层背离所述有机电致发光显示层的一侧。
本发明还提供一种光学胶的制备方法，所述光学胶的制备方法包括：
提供一基底膜；
在所述基底膜上形成油墨层，且所述油墨层的面积小于所述基底膜的面积；
在所述基底膜上形成第一胶层，所述第一胶层覆盖所述油墨层。
优选的，所述光学胶的制备方法在形成第一胶层后还包括：
翻转基底膜，在所述基底膜远离所述第一胶层的表面上形成第二胶层。
优选的，所述光学胶的制备方法在“在所述基底膜上形成第一胶层，所述第一胶层覆盖所述油墨层”与“翻转基底膜，在所述基底膜远离所述油墨层的表面上形成第二胶层”之间还包括：
在所述第一胶层远离所述基底膜的表面上形成第一离型膜；
在“翻转基底膜，在所述基底膜远离所述第一胶层的表面上形成第二胶层”之后还包括：
在所述第二胶层远离所述基底膜的表面上形成第二离型膜。
本发明还提供一种光学胶的制备方法，所述光学胶的制备方法包括：
提供一基底膜；
在所述基底膜上形成第二胶层；
翻转基底膜，在所述基底膜远离所述第二胶层的表面上形成油墨层，且所述油墨层的面积小于所述基底膜的面积；
在所述基底膜远离所述第二胶层上形成第一胶层，所述第一胶层覆盖所述油墨层。
优选的，所述光学胶的制备方法在“在所述基底膜上形成第二胶层”与“翻转基底膜，在所述基底膜远离所述第二胶层的表面上形成油墨层，且所述油墨层的面积小于所述基底膜的面积”之间还包括：
在所述第二胶层远离所述基底膜的表面上形成第二离型膜；
在“在所述基底膜远离所述第二胶层上形成第一胶层，所述第一胶层覆盖所述油墨层”之后还包括：
在所述第一胶层远离所述基底膜的表面上形成第一离型膜。
本发明的有益效果：本发明提供的一种光学胶用于粘结器件或者膜层时还能用于遮挡器件或者遮光，且直接将油墨层设置在光学胶与基底膜之间，所形成油墨层与光学胶之间的油墨段差填充能力，相较于将光学胶层用于粘结盖板上的油墨层而形成的油墨层与光学胶之间的油墨段差填充能力更强。
附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例中所需要 使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明第一实施例提供的一种光学胶的结构示意图；
图2为本发明第一实施例提供的另一种光学胶的结构示意图；
图3为本发明第一实施例提供的一种光学胶的油墨区的结构示意图；
图4为本发明第二实施例提供的一种光学胶的结构示意图；
图5为本发明第三实施例提供的一种光学胶的结构示意图；
图6a和图6b为本发明提供的一种第一胶层在紫外光下分解前后的示意图；
图7为本发明第四实施例提供的一种光学胶的结构示意图；
图8为本发明提供的一种显示面板的结构示意图；
图9为油墨层设置在盖板上的结构示意图；
图10为本发明提供的另一种显示面板的结构示意图；
图11为本发明提供的一种光学胶的制备方法流程图；
图12为本发明提供的另一种光学胶的制备方法流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的说明书和权利要求书及所述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一系列步骤或单 元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本发明的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
请参阅图1，本发明第一实施例提供一种光学胶10，光学胶10包括基底膜100、油墨层200及第一胶层300，油墨层200设置在基底膜100的表面上，且油墨层200的面积小于基底膜100的面积，第一胶层300设置在基底膜100上且覆盖油墨层200。该光学胶10用于粘结器件或者膜层的同时还可用于需要油墨层遮光、遮挡器件或者用于需要标记的器件中，并且将油墨层200设置在基底膜100与光学胶层300之间，可以使第一光学胶300完全吸收掉油墨层200的油墨段差。可以理解的是，在制备时将具有流体状的光学胶层材料涂布或印刷在基底膜100上并覆盖油墨层200，流体状的光学胶层材料能够与油墨层200贴合更紧密，填充此油墨段差。
请参阅图2，在进一步的实施例中，第一胶层300远离基底膜100的表面310为平面。以使第一光学胶300与所要粘结的目标器件或者膜层之间界面粘结更紧密，例如与电子显示装置中的盖板粘结，使得第一光学胶300与盖板之间完全贴合，当用于柔性电子显示装置中时，紧密贴合后在弯折过程中保证第一光学胶300与盖板的界面不发生剥离。可以理解的是，在制备时将具有流体状的光学胶层材料涂布或印刷在基底膜100上并覆盖油墨层200，流体状的光学胶层材料经固化形成平面具黏性的半固体光学胶。
其中基底膜100的材料包括但不限于聚对苯二甲酸乙二醇酯(Polyethylene terephthalate，PET)、高透无色聚酰亚胺(Colorless Polyimide)、聚甲基丙烯酸甲酯(polymethyl methacrylate，PMMA)。优选的，所述基底膜100的材料与油墨层200的材料之间具有较好的吸附力，以使油墨层200更好印刷在基底膜100上。优选的，所述基底膜100的厚度小于等于25μm，保证基底膜100占整个光学胶10的厚度比例更少，且具有较高弯折特性。
在进一步的实施例中，基底膜100包括第一油墨区110和第二油墨区120，第一油墨区110和第二油墨区120间隔设置在基底膜100的两端，油墨层200设置在第一油墨区110和第二油墨区120内。可以理解的是，当光学胶10用于电子显示装置中时，基底膜100的油墨区130可以是沿基底膜100的周边设置一圈(参阅图3)，其中油墨区130是指油墨层200所在区域。在其他一些实施例中，油墨区130还可以按照不同外观要求，尺寸大小等设置成图案化，根据光学胶10实际应用情况可调整。可以理解的是，油墨图案化包括但不限定于矩形、菱形、圆形、三角形等。
请参阅图4，本发明第二实施例提供一种光学胶10a，光学胶10a还包括第二胶层500，第二胶层500设置在基底膜100远离油墨层200的表面上。该实施例中的光学胶10a在上下两面分别设置了第一胶层300和第二胶层500，第一胶层300用于粘结其中的一面，第二胶层500用于粘结另一面，以使光学胶10a上下两面均能够粘结器件或者膜层。例如当光学胶10a用于柔性电子显示装置中时，第一胶层300用于粘结盖板，第二胶层500用于粘结柔性电子显示装置中的偏光片。
其中，第一胶层300和第二胶层500的厚度控制在100μm以下，厚度优选控制在50μm以下，保证光学胶层薄化的同时具有更好弯折特性。第一胶层 300和第二胶层500的成分包括但不限定于丙烯酸系化合物、硅胶系化合物、橡胶系化合物、聚氨酯系化合物中的至少一种。
在进一步的实施例中，第一胶层300为减粘胶，第一胶层300在满足减粘条件下时，第一胶层300的界面粘结力下降，减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。界面粘结力是指胶层与界面之间的粘结力。将第一胶层300采用减粘胶，可以保证第一胶层300所要粘结的目标器件或者膜层进行重工，例如当第一胶层300用与粘结盖板时，当盖板出现问题需要重工时，将第一胶层300进行减粘处理降低粘结力，就可以将盖板剥离，方便重工。优选的，第一胶层300的粘结力可下降到100g/inch以下。
当施加减粘条件为，将第一胶层300置于光场(如紫外光/红外光/激光照射)中，外界能量作用于第一胶层300，导致第一胶层300分子结构发生变化致使黏附于目标器件或者膜层上的界面粘结力下降；或者将第一胶层300置于电场(施加电流电压，电产生热)中，第一胶层300吸收一定能量，导致第一胶层300黏附于目标器件或者膜层上的界面粘结力下降；或者将第一胶层300置于磁场(施加磁场，将磁场转变为电场，电场产生热)中，第一胶层300吸收一定能量，导致第一胶层300黏附于目标器件或者膜层上的界面粘结力下降；或者力场，例如，第一胶层300由一具粘性的压电材料制成，施力给所述压电材料时，所述压电材料会产生电压，即相当于向第一胶层300施加电场，第一胶层300吸收一定能量，导致第一胶层300黏附于目标器件或者膜层上的界面粘结力下降；又或者，对第一胶层300进行加热，第一胶层300吸收一定能量，导致第一胶层300黏附于目标器件或者膜层上的界面粘结力下降。
请参阅图5，本发明第三实施例提供一种光学胶10b，在光学胶10b中，第一胶层300中包括光起始剂310，当第一胶层300在紫外光照射下时，光起 始剂能够引发第一胶层300中的分子分解以降低第一胶层300的界面粘结力。请参阅图6a(分解前)和图6b(分解后)，例如第一胶层300是包括聚丙烯酸系化合物材料，在光起始剂310被紫外光照射时引发聚丙烯酸系化合物发生分子分解，裂解成小分子物质，从而降低了界面分子作用力，达到剥离强度下降的目的。
请参阅图7，本发明第四实施例提供一种光学胶10c，在光学胶10c中，第一胶层300中包括气体引发剂320，当第一胶层300在紫外光照射照射下时，气体引发剂320能够裂解产生气体以降低第一胶层300的界面粘结力。例如当第一胶层300中包括聚氨酯系化合物时，在紫外光照射下会产生氮气，氮气生成过程中将第一胶层300与粘结界面分离，使其剥离强度大大降低。
在进一步的实施例中，第二胶层500为减粘胶，第二胶层500在满足减粘条件下时，第二胶层500的界面粘结力下降，减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。同样的，减粘特性保证第二胶层500所要粘结的目标器件或者膜层进行重工。可以理解的是，光学胶10可以根据需要将第一胶层300或者第二光学胶500中的一个或者两个同时为减粘胶。可以理解的是，所述第一胶层300和第二胶层500的光学胶性能也可根据要求进行不同功能设置。所述的光学胶性能包括但不限定于剥离强度(peeling force)、低水汽透过率(lowwater vapor transmission rate)、高/低介电常数(high/low dielectric constant)、弯折特性(bending)等。
请再次参阅图4，在进一步的实施例中，在光学胶10a中还包括第一离型膜400，第一离型膜400设置在第一胶层300远离基底膜100的表面上。第一离型膜400用于保护第一胶层300。其中第一离型膜400包括PE(聚乙烯)离型膜、PET离型膜、OPP(聚丙烯)离型膜、复合离型膜中的至少一种。优选 的，第一离型膜400是由PE、PET、OPP中的两种及两种以上材料构成。
在进一步的实施例中，光学胶10a还包括第二离型膜600，第二离型膜600设置在第二光学胶500远离基底膜100的表面上。第二离型膜600用于保护第二光学胶500。
在进一步的实施例中，第二离型膜600黏附第二胶层500的粘结力与第一离型膜400黏附第一胶层300的粘结力不同。也就是说保证一面离型膜先剥离，另一面离型膜后剥离，该实施例的光学胶10a可用于首先将第一离型膜400剥离下来，将第一胶层300先于第二胶层500粘结目标器件或者膜层。可以理解的是，当光学胶10a中的第二胶层500先于第一胶层300粘结目标器件或者膜层时，那么第二离型膜600黏附第二胶层500的粘结力则小于第一离型膜400黏附第一胶层300的粘结力。也就说更容易剥离下来的离型膜对应的胶层先用于粘结目标器件。
请参阅图8，本发明还提供一种显示面板20，显示面板20包括如上述任一项实施例所述的光学胶10。可以理解的是，对于用于保护光学胶层的离型膜，当该光学胶10用于显示面板20时，将第一离型膜400和第二离型膜600剥离掉后将光学胶10粘结在显示面板20中。
在进一步的实施例中，显示面板20还包括盖板210，盖板210设置在光学胶10中的第一胶层300远离基底膜100的表面上。其中盖板210中没有包括油墨层。该实施例提供的光学胶10中的油墨层200用于遮挡显示面板20边界的光线或者遮挡盖板210下其他的膜层以及器件。当将油墨层200直接设置在盖板210邻近光学胶10的表面上(参阅图9)，再将一层常规的光学胶11覆盖油墨层200并粘结盖板210时，图9中盖板210上因具有油墨层200，在贴合胶状的光学胶11后，光学胶11与油墨层200之间具有段差，使得盖板210与光学胶11之间的段差空隙12较难填充。与之相对的，本发明实施例提 供的光学胶10的第一胶层在液态时即覆盖住油墨层而形成平整的表面，使得第一胶层与盖板210之间为平面接触，不存在段差的问题。
请再次参阅图8，在进一步的实施例中，盖板210包括层叠设置的盖板基底膜211和硬化层212，且盖板基底膜211设置在第一胶层300远离基底膜100的表面上。硬化层212用于增强盖板210的强度，保护盖板210下方的器件。
请参阅图10，在进一步的实施例中，显示面板20包括触控层220，触控层220设置在光学胶10中的基底膜100中。将触控层200设置在基底膜100中可降低显示面板20的厚度。
在进一步的实施例中，显示面板20包括偏光片230、有机电致发光显示层240、薄膜晶体管层250及支撑膜260。其中偏光片230设置在光学胶10远离盖板210的一侧，有机电致发光显示层240设置在偏光片230远离光学胶10的一侧，偏光片230用于对有机电致发光器件240发出的光过滤形成偏振光。薄膜晶体管层250设置在有机电致发光显示层240远离偏光片230的一侧，支撑膜260设置在薄膜晶体管层250背离有机电致发光显示层240的一侧。
请参阅图11，本发明还提供一种光学胶10的制备方法，光学胶10的制备方法包括步骤S100、步骤S200及步骤S300。详细步骤见下述。
步骤S100，提供一基底膜100。其中基底膜100的材料包括但不限于聚对苯二甲酸乙二醇酯、聚酰亚胺、聚甲基丙烯酸甲酯中的一种。优选的，采用两种及两种以上。
步骤S200，在基底膜100上形成油墨层200，且油墨层200的面积小于基底膜100的面积。可通过油墨印刷技术将不同尺寸/厚度的油墨层200印刷在基底膜100上。
步骤S300，在基底膜100上形成第一胶层300，第一胶层300覆盖油墨层200。优选的将液体状的第一胶层300材料印刷涂布于基底膜100上并覆盖油 墨层200，流体状的光学胶层材料能够与油墨层200贴合更紧密，且在远离基底膜100的表面可固化成平面，以使第一光学胶300与所要粘结的目标器件或者膜层之间的界面粘结力更强。
在进一步的实施例中，光学胶10的制备方法在形成第一胶层300后还包括步骤S400。
步骤S400，翻转基底膜100，在基底膜100远离第一胶层300的表面上形成第二胶层500。
其中，第一胶层300和第二胶层500的厚度小于等于100μm，厚度优选控制在50μm以下，保证光学胶层薄化的同时具有更好弯折特性，其成分包括但不限定于丙烯酸系化合物、硅胶系化合物、橡胶系化合物、聚氨酯系化合物中的至少一种。
在进一步的实施例中，光学胶10的制备方法在“在基底膜100上形成第一胶层300，第一胶层300覆盖油墨层200层”与“翻转基底膜100，在基底膜100远离油墨层200的表面上形成第二胶层500”之间还包括步骤S300a。
步骤S300a，在第一胶层300远离基底膜100的表面上形成第一离型膜400。
在“翻转基底膜100，在基底膜100远离第一胶层300的表面上形成第二胶层500”之后还包括步骤S500。
步骤S500，在第二胶层500远离基底膜100的表面上形成第二离型膜600。
请参阅图12，本发明还提供另一种光学胶10的制备方法，其中第二胶层500先于第一胶层300形成。具体的，光学胶10的制备方法包括步骤S100-Ⅰ、步骤S200-Ⅰ、步骤S300-Ⅰ及步骤S400-Ⅰ。详细介绍如下。
步骤S100-Ⅰ，提供一基底膜100。
步骤S200-Ⅰ，在基底膜100上形成第二胶层500。
步骤S300-Ⅰ，翻转基底膜100，在基底膜100远离第二胶层500的表面 上形成油墨层200，且油墨层200的面积小于基底膜100的面积。
步骤S400-Ⅰ，在基底膜100远离第二胶层500上形成第一胶层300，第一胶层300覆盖油墨层200。
在进一步的实施例中，光学胶10的制备方法在“在基底膜100上形成第二胶层500”与“翻转基底膜100，在基底膜100远离第二胶层500的表面上形成油墨层200，且油墨层200的面积小于基底膜100的面积”之间还包括步骤S200a-Ⅰ。
步骤S200a-Ⅰ，在第二胶层500远离基底膜100的表面上形成第二离型膜600。
在“在基底膜100远离第二胶层500上形成第一胶层300，第一胶层300覆盖油墨层”之后还包括步骤S500-Ⅰ。
S500-Ⅰ，在第一胶层300远离基底膜100的表面上形成第一离型膜400。
以上实施例仅表达了本发明的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对本发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。

Claims (21)

  1. 一种光学胶，其特征在于，所述光学胶包括：
    基底膜；
    油墨层，所述油墨层设置在所述基底膜的表面上，且所述油墨层的面积小于所述基底膜的面积；
    第一胶层，所述第一胶层设置在所述基底膜上且覆盖所述油墨层。
  2. 如权利要求1所述的光学胶，其特征在于，所述基底膜包括第一油墨区和第二油墨区，所述第一油墨区和所述第二油墨区间隔设置在所述基底膜的两端，所述油墨层设置在所述第一油墨区和所述第二油墨区内。
  3. 如权利要求1-2任一项所述的光学胶，其特征在于，所述光学胶还包括：
    第二胶层，所述第二胶层设置在所述基底膜远离所述油墨层的表面上。
  4. 如权利要求1-3任意一项所述的光学胶，其特征在于，所述第一胶层为减粘胶，所述第一胶层在满足减粘条件下时，所述第一胶层的界面粘结力下降，所述减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。
  5. 如权利要求4所述的光学胶，其特征在于，所述第一胶层中包括光起始剂，当第一胶层在紫外光照射照射下时，所述光起始剂能够引发所述第一胶层中的分子分解以降低所述第一胶层的界面粘结力。
  6. 如权利要求4所述的光学胶，其特征在于，所述第一胶层中包括气体引发剂，当第一胶层在紫外光照射照射下时，所述气体引发剂能够裂解产生气体以降低所述第一胶层的界面粘结力。
  7. 如权利要求3所述的光学胶，其特征在于，所述第二胶层为减粘胶，所述第二胶层在满足减粘条件下时，所述第二胶层的界面粘结力下降，所述减粘条件包括紫外光照射、红外光照射、激光照射、施加电场、施加力场、施加磁场、低温及加热的其中至少一种。
  8. 如权利要求1-7任意一项所述的光学胶，其特征在于，所述第一胶层远离所述基底膜的表面为平面。
  9. 如权利要求3所述的光学胶，其特征在于，所述光学胶还包括：
    第一离型膜，所述第一离型膜设置在所述第一胶层远离所述基底膜的表面上。
  10. 如权利要求9所述的光学胶，其特征在于，所述光学胶还包括：
    第二离型膜，所述第二离型膜设置在所述第二光学胶远离所述基底膜的表面上。
  11. 如权利要求10所述的光学胶，其特征在于，所述第二离型膜黏附所述第二胶层的粘结力与所述第一离型膜黏附所述第一胶层的粘结力不同。
  12. 一种显示面板，其特征在于，所述显示面板包括如权利要求1-8任一 项所述的光学胶。
  13. 如权利要求12所述的显示面板，其特征在于，所述显示面板还包括盖板，所述盖板设置在所述光学胶中的所述第一胶层远离所述基底膜的表面上。
  14. 如权利要求13所述的显示面板，其特征在于，所述盖板包括层叠设置的盖板基底膜和硬化层，且所述盖板基底膜设置在所述第一胶层远离所述基底膜的表面上。
  15. 如权利要求13所述的显示面板，其特征在于，所述显示面板包括触控层，所述触控层设置在所述光学胶中的所述基底膜中。
  16. 如权利要求13所述的显示面板，其特征在于，所述显示面板包括：
    偏光片，所述偏光片设置在所述光学胶远离所述盖板的一侧；
    有机电致发光显示层，所述有机电致发光显示层设置在所述偏光片远离所述光学胶的一侧；
    薄膜晶体管层，所述薄膜晶体管层设置在所述有机电致发光显示层远离所述偏光片的一侧；
    支撑膜，所述支撑膜设置在所述薄膜晶体管层背离所述有机电致发光显示层的一侧。
  17. 一种光学胶的制备方法，其特征在于，所述光学胶的制备方法包括：
    提供一基底膜；
    在所述基底膜上形成油墨层，且所述油墨层的面积小于所述基底膜的面积；
    在所述基底膜上形成第一胶层，所述第一胶层覆盖所述油墨层。
  18. 如权利要求17所述的制备方法，其特征在于，所述光学胶的制备方法在形成第一胶层后还包括：
    翻转基底膜，在所述基底膜远离所述第一胶层的表面上形成第二胶层。
  19. 如权利要求18所述的制备方法，其特征在于，所述光学胶的制备方法在“在所述基底膜上形成第一胶层，所述第一胶层覆盖所述油墨层”与“翻转基底膜，在所述基底膜远离所述油墨层的表面上形成第二胶层”之间还包括：
    在所述第一胶层远离所述基底膜的表面上形成第一离型膜；
    在“翻转基底膜，在所述基底膜远离所述第一胶层的表面上形成第二胶层”之后还包括：
    在所述第二胶层远离所述基底膜的表面上形成第二离型膜。
  20. 一种光学胶的制备方法，其特征在于，所述光学胶的制备方法包括：
    提供一基底膜；
    在所述基底膜上形成第二胶层；
    翻转基底膜，在所述基底膜远离所述第二胶层的表面上形成油墨层，且所述油墨层的面积小于所述基底膜的面积；
    在所述基底膜远离所述第二胶层上形成第一胶层，所述第一胶层覆盖所述油墨层。
  21. 如权利要求20所述的制备方法，其特征在于，所述光学胶的制备方法在“在所述基底膜上形成第二胶层”与“翻转基底膜，在所述基底膜远离所 述第二胶层的表面上形成油墨层，且所述油墨层的面积小于所述基底膜的面积”之间还包括：
    在所述第二胶层远离所述基底膜的表面上形成第二离型膜；
    在“在所述基底膜远离所述第二胶层上形成第一胶层，所述第一胶层覆盖所述油墨层”之后还包括：
    在所述第一胶层远离所述基底膜的表面上形成第一离型膜。
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