WO2021003740A1 - 柔性盖板、柔性显示屏及显示面板 - Google Patents

柔性盖板、柔性显示屏及显示面板 Download PDF

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Publication number
WO2021003740A1
WO2021003740A1 PCT/CN2019/095619 CN2019095619W WO2021003740A1 WO 2021003740 A1 WO2021003740 A1 WO 2021003740A1 CN 2019095619 W CN2019095619 W CN 2019095619W WO 2021003740 A1 WO2021003740 A1 WO 2021003740A1
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WIPO (PCT)
Prior art keywords
layer
flexible cover
ultra
thin glass
cover plate
Prior art date
Application number
PCT/CN2019/095619
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English (en)
French (fr)
Inventor
温胜山
张琨
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 CN201980090086.2A priority Critical patent/CN113366556A/zh
Priority to PCT/CN2019/095619 priority patent/WO2021003740A1/zh
Publication of WO2021003740A1 publication Critical patent/WO2021003740A1/zh

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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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations

Definitions

  • the embodiments of the present application relate to the field of display technology, in particular to a flexible cover, a flexible display screen, and a display panel.
  • the embodiments of the present application aim to provide a flexible cover plate, a flexible display screen, and a display panel to solve the technical problem that the flexible cover plate in the prior art cannot satisfy the hardness and drop resistance characteristics at the same time, while having good bending characteristics.
  • a flexible cover plate applied to a flexible display screen, the flexible cover plate comprising: an ultra-thin glass layer, the ultra-thin glass layer is used to attach to the flexible display screen, the ultra-thin glass layer Flexibility;
  • the substrate is formed on the ultra-thin glass layer, and the substrate is used to increase the hardness of the flexible cover plate.
  • the thickness of the flexible cover plate ranges from 10 ⁇ m to 200 ⁇ m.
  • the flexible cover sheet further includes an ink layer laminated on the surface of the ultra-thin glass layer away from the substrate.
  • the thickness of the ink layer ranges from 3 ⁇ m to 30 ⁇ m.
  • the substrate is coated on the ultra-thin glass layer; the thickness of the substrate ranges from 1 ⁇ m to 100 ⁇ m.
  • the thickness of the ultra-thin glass layer ranges from 50 ⁇ m to 75 ⁇ m
  • the Young's modulus of the ultra-thin glass layer ranges from 10 to 100 Gpa
  • the surface hardness of the ultra-thin glass layer ranges from 3H to 9H.
  • the surface flatness of the ultra-thin glass layer is not greater than 10 nm.
  • the flexible cover plate further includes a functional coating, and the functional coating includes one or more of a hardened layer, an anti-fingerprint layer, an anti-glare layer, and an anti-reflection layer;
  • One or more of the hardened layer, the anti-fingerprint layer, the anti-glare layer, and the anti-reflection layer are laminated on the substrate or the ultra-thin glass layer, respectively.
  • the thickness of the functional coating ranges from 1 ⁇ m to 20 ⁇ m.
  • the flexible cover plate further includes an adhesive layer disposed between the ultra-thin glass layer and the substrate.
  • the adhesive layer is an adhesive layer, and the adhesive layer is used to reduce the stress experienced when the flexible cover is bent.
  • the viscosity of the adhesive layer ranges from 3N/inch to 15N/inch; and/or, when the external temperature in Celsius is -40°C, the storage modulus of the adhesive layer is not greater than 2000KPa;
  • the storage modulus of the adhesive layer is not more than 200KPa;
  • the storage modulus of the adhesive layer is in the range of 10-60KPa.
  • the adhesive layer is a tack-reducing layer, and the tack-reducing layer is used to separate the ultra-thin glass layer from the substrate under preset conditions.
  • the flexible cover plate further includes an energy reduction layer, and the energy reduction layer is disposed between the substrate and the glue layer.
  • the energy reduction layer is one or both of an ultraviolet absorption layer and a heat dissipation layer.
  • a flexible display screen comprising: the above-mentioned flexible cover plate, a display module and a bottom plate; the display module is arranged between the flexible cover plate and the bottom plate.
  • a display panel including: a first protective layer
  • An extruded deformation layer, the extruded deformation layer is located on the first protective layer;
  • the flexible display screen is located on a side of the squeezed deformation layer away from the first protective layer;
  • a second protective layer where the second protective layer is located on a side of the flexible display screen away from the first protective layer;
  • the pressure sensor is located between the second protective layer and the squeezed deformation layer.
  • the flexible cover due to the ultra-thin characteristics of the ultra-thin glass layer, the flexible cover has good bending characteristics, and the substrate does not affect the flexible cover.
  • the bending characteristics of the board also increase the hardness of the flexible cover, so that the flexible cover composed of the ultra-thin glass layer and the substrate has good bending characteristics, but also has hardness and resistance. The characteristics such as falling, meet the requirements of flexible cover in flexible display screen.
  • Fig. 1 is a schematic structural diagram of a flexible cover provided by one embodiment of the present application.
  • FIGS. 2 to 4 are schematic diagrams showing the structure of flexible cover plates according to different embodiments
  • FIG. 5 is a schematic structural diagram of a flexible display screen provided by one of the embodiments of the present application.
  • FIG. 6 is a schematic structural diagram of a display panel provided by one embodiment of the present application.
  • a flexible cover 100 provided by an embodiment of the present application is applied to a flexible display screen, and includes an ultra-thin glass layer 20 and a substrate 40.
  • the ultra-thin glass layer 20 is used to be attached to the flexible On the display screen, the ultra-thin glass layer 20 has bendability; due to the ultra-thin characteristics of the ultra-thin glass layer 20, it has good bending characteristics, and the ultra-thin glass layer 20 has good bending properties. On the basis of foldability, it can also have higher hardness and/or stiffness to meet the characteristics of drop resistance and recovery.
  • the substrate 40 is formed on the ultra-thin glass layer 20, and the substrate 40 is used to increase the hardness of the flexible cover 100. Since the base material 40 is formed on the ultra-thin glass layer 20 and faces the user, the base material 40 has the characteristics of scratch resistance and abrasion resistance while having a preset hardness. Furthermore, when the material of the base material 40 is an organic material, the base material 40 is provided with bending characteristics, which can further improve the bendability of the flexible cover 100.
  • the flexible cover 100 has good bending characteristics.
  • the substrate 40 does not affect the bending characteristics of the flexible cover 100 while improving The hardness of the flexible cover plate 100 is improved, so that the flexible cover plate 100 composed of the ultra-thin glass layer 20 and the base material 40 has good bending characteristics, and also has the characteristics of hardness, drop resistance, etc.
  • the requirements for the flexible cover 100 in the flexible display screen are met.
  • the flexible cover composed of the ultra-thin glass layer 20 and the substrate 40 is made
  • the thickness of the flexible cover 100 ranges from 10 ⁇ m to 200 ⁇ m.
  • the thickness of the flexible cover plate 100 ranges from 40 ⁇ m to 100 ⁇ m.
  • the ultra-thin glass layer 20 may be alkali-containing ultra-thin glass and alkali-free ultra-thin glass.
  • the alkali-containing ultra-thin glass may be soda lime silicate glass or aluminosilicate glass.
  • the alkali-free ultra-thin glass may be borate glass.
  • the ultra-thin glass layer 20 is thinned (etched) and strengthened (ion exchange) to meet the requirements of ultra-thin characteristics.
  • the thickness of the ultra-thin glass layer 20 may range from 10 ⁇ m to 100 ⁇ m.
  • the ultra-thin glass ranges from 50 ⁇ m to 75 ⁇ m.
  • the ultra-thin glass layer 20 in order to make the ultra-thin glass layer 20 on the basis of bendability, it may have higher hardness and/or rigidity at the same time, so as to meet the characteristics of drop resistance and recovery.
  • the surface hardness of the ultra-thin glass layer 20 ranges from 3H to 9H.
  • the surface hardness of the ultra-thin glass layer 20 ranges from 4H to 7H.
  • the Young's modulus (E ) Ranges from 10 GPa to 100 GPa.
  • the Young's modulus (E) of the ultra-thin glass layer 20 ranges from 50 Gpa to 80 Gpa, and the surface flatness of the ultra-thin glass layer is not greater than 10 nm.
  • the raw material of the aluminosilicate ultra-thin glass includes the following components according to weight percentages: 60 parts by weight of silica, 10 parts by weight of alumina, 11 parts by weight of sodium oxide, and 3 parts by weight of magnesium oxide;
  • the preparation method of the aluminosilicate ultra-thin glass includes the following steps:
  • Raw material melting The raw material of the above-mentioned aluminosilicate ultra-thin glass is directly added to the melting furnace at about 1300 degrees Celsius to form molten glass;
  • Clarification of molten glass increase the temperature to 1400-1500 degrees Celsius to form molten glass and discharge visible bubbles and dissolved gases in it;
  • the glass is kept at high temperature (for example: 1200-1300 degrees Celsius) for a long time to eliminate the stripes in the molten glass to form a homogenized molten glass;
  • the aluminosilicate ultra-thin glass produced in step 4) is processed by an ion exchange method.
  • the specific processing steps are as follows: ultrasonic cleaning and brushing of the glass are carried out to thin the aluminosilicate ultra-thin glass ( Etching) treatment, then pre-heat treatment at 200-300 degrees Celsius, and then immersed in 450 degrees Celsius molten KNO 3 for ion exchange treatment. Finally, the aluminosilicate ultra-thin glass is formed.
  • the material of the substrate 40 can be PI (polyimide, polyimide), CPI (colorless, colorless and transparent polyimide), PET (polyethylene terephthalate, polyethylene terephthalate), PMMA (Polyimide) Methyl Methacrylate methacrylic Acid, PC (Polycarbonate, polycarbonate).
  • PI polyimide, polyimide
  • CPI colorless, colorless and transparent polyimide
  • PET polyethylene terephthalate, polyethylene terephthalate
  • PMMA Polyimide
  • PC Polycarbonate, polycarbonate
  • roll-to-roll such as coating or printing can be used.
  • the to Roll process forms the substrate 40 on the ultra-thin glass layer 20.
  • the surface hardness of the substrate 40 ranges from 1H to 5H.
  • the surface hardness of the substrate 40 ranges from 3H to 4H.
  • the Young's modulus (E) of the base material 40 is in the range of 2Gpa ⁇ 10Gpa, preferably Preferably, the Young's modulus (E) of the substrate 40 ranges from 5 to 7 Gpa, and the thickness of the substrate 40 ranges from 10 to 100 ⁇ m. Preferably, the thickness of the substrate 40 ranges from 20 to 60 ⁇ m.
  • the flexible cover 100a provided by some embodiments of the present application is basically the same as the flexible cover 100 shown in FIG. 1, except that the flexible cover 100 further includes a functional coating 60.
  • the functional coating 60 Coated on the surface of the substrate 40 facing away from the ultra-thin glass layer 20, the functional coating 60 includes one or more of a hardened layer, an anti-fingerprint layer, an anti-glare layer, and an anti-reflection layer.
  • One of the hardened layer, the anti-fingerprint layer, the anti-glare layer, and the anti-reflection layer is laminated or coated on the surface of the substrate 40 facing away from the ultra-thin glass layer 20, when
  • the functional coating 60 includes multiple coatings
  • the stacking sequence of the multiple coatings can be set according to actual needs, which is not limited herein. Since the materials used for the above-mentioned different types of coatings are different, the corresponding uses are also different. In actual applications, in order to achieve different functions, one or more of the coatings can be selected to be applied to the The substrate 40 faces away from the surface of the ultra-thin glass layer 20.
  • the hardened layer is used to protect the substrate 40 and improve the scratch resistance and wear resistance of the flexible cover 100.
  • the hardened layer may be made of metal nitride, or pure metal or metal carbon. Or it can be composed of any combination of metal, nitride and carbon, and it can also be a so-called DLC-layer (diamond-like carbon layer).
  • the anti-fingerprint layer is used to improve the anti-fouling performance of the flexible cover 100, and the anti-fingerprint layer can reduce the adhesion of fingerprints, oil, dust, water, etc., to the flexible cover 100.
  • the anti-fingerprint layer may be made of organic fluoride.
  • the anti-glare layer is used to control light scattering/light reflection to suppress the deterioration of the visibility of the image display device
  • the material of the anti-glare layer may be a second (meth)acrylate-based crosslinked polymer And at least two light-transmitting fine particles of submicron (sub- ⁇ m) order dispersed on the second adhesive.
  • the anti-reflection layer is used to use light scattering or optical interference to reduce image reflection and light reflection
  • the material of the anti-reflection layer may be polyvinyl alcohol (PVA), but not This is a limit, and it can also be replaced by adding pigments to the liquid crystal to further reduce the thickness.
  • PVA polyvinyl alcohol
  • the thickness of the anti-reflection layer ranges from 3um to 50um, but is not limited to this.
  • the functional coating 60 may also be a transmission enhancing layer, a light shielding layer, a protective layer, and so on.
  • a transmission enhancing layer e.g., a transmission enhancing layer
  • a light shielding layer e.g., a light shielding layer
  • a protective layer e.g., a protective layer
  • One or more of them can be arbitrarily selected to be laminated and coated on the surface of the substrate 40 facing away from the ultra-thin glass layer 20 according to the required function.
  • the transmittance enhancement layer can enhance the color permeability of the flexible cover 100, and the transmittance enhancement layer can also enhance the brightness of the bottom phase of the cover 100 and the brightness of the appearance color of the flexible cover 100.
  • the transmission enhancement layer can be formed by electroplating.
  • the material of the transmission enhancement layer includes silicon oxide and titanium oxide.
  • the flexible cover 100b provided by some embodiments of the present application is basically the same as the flexible cover 100 shown in FIG. 1, except that the flexible cover 100b further includes a glue layer 80, which is disposed on Between the ultra-thin glass layer 20 and the substrate 40.
  • the adhesive layer 80 can be an adhesive layer or a tack-reducing layer.
  • the glue layer 80 can be set to Adhesive layer.
  • the ultra-thin glass layer 20 and the substrate 40 are adhered together through the adhesive layer.
  • the adhesive layer can generate adhesion , So as to share the stress of the ultra-thin glass layer 20 and the substrate 40 during bending, thereby reducing the stress of the ultra-thin glass layer 20 and the substrate 40 during bending, and improving the flexible cover 100 bending characteristics.
  • the viscosity of the adhesive layer is set to be in the range of 3N/inch to 20N/inch.
  • the adhesive layer The viscosity range is 6N/inch ⁇ 12N/inch; when the external temperature is -40°C, the storage modulus of the adhesive layer is not more than 2000KPa; when the external temperature is -20°C, the adhesive layer The storage modulus is not more than 200KPa; when the external temperature in Celsius is in the range of 0°C-100°C, the storage modulus of the adhesive layer is in the range of 10-60KPa.
  • the material of the adhesive layer can be one of optical glue, pressure-sensitive adhesive and adhesive, etc.
  • the composition of the adhesive layer includes but is not limited to one of acrylic compounds, silicone compounds, rubber compounds, etc. Or multiple.
  • the adhesive layer 80 can be set as a viscosity-reducing layer. Under the conditions of light (UV light/laser, etc.), heating and voltage, the reduction is The adhesion layer decomposes or generates gas, which causes the interface adhesion (peel strength) of the adhesion reduction layer to drop sharply, and the adhesion of the adhesion reduction layer can drop to 1-50 g/inch.
  • the ultra-thin glass layer 20 peel off from the substrate 40 without damaging the interface of the ultra-thin glass layer 20
  • the problem of repeated processing is solved, and the cost of repeated processing is reduced.
  • the viscosity-reducing layer can be a UV viscosity-reducing layer, a laser viscosity-reducing layer, a heating viscosity-reducing layer, etc.
  • the viscosity-reducing layer is a UV viscosity-reducing layer, which is mainly composed of the following raw materials by weight percentage Made: Acrylic pressure-sensitive adhesive resin 20%-50%, multifunctional oligomer and/or multifunctional monomer 1%-30%, crosslinking agent 0.3%-2%, antistatic agent 0.1%- 5%, dispersant 0-2%, leveling agent 0.2%-2%, photoinitiator 0.5%-5% and solvent 25%-60%.
  • the acrylic pressure-sensitive adhesive resin is a solvent-based acrylic pressure-sensitive adhesive.
  • the molecular weight of the acrylic pressure-sensitive adhesive resin is 100,000 to 2 million. Further, preferably, the solid content of the solvent-based acrylate pressure-sensitive adhesive is 20%-60%, and the viscosity is 200cps-20000cps. The use of a specific acrylic pressure-sensitive adhesive resin helps to improve the peeling force and cohesive force of the UV adhesion reducing layer.
  • the material of the viscosity-reducing layer includes but not limited to Silsurf A010-D, Silub TMP D218, Silquat D208-CDA, Silmer OH C50, Silmer ACR D208, Silmer NCO Di-100, Silmer EP Di-50, BYK's UV3500 series products, Evonik's UV2700 series products, Momentive's UV9300, UV9430, Blue One or more of POLY360 and PLOY200 of Star Company.
  • the flexible cover 100c provided by some embodiments of the present application is basically the same as the flexible cover 100b shown in FIG. 3, the difference is that the flexible cover 100c further includes an energy reduction layer 30, which It is arranged between the adhesive layer 80 and the substrate 40.
  • the energy reduction layer 30 may be an ultraviolet absorption layer and/or a heat dissipation layer.
  • the energy reduction layer 30 can block the external environment (high temperature and ultraviolet rays) from damage to the flexible display screen, thereby prolonging the service life of the flexible display screen. For example, at noon in summer, the temperature of the external environment is high and the intensity of ultraviolet radiation is high. The flexible display screen is exposed to this external environment. If the energy reduction layer 30 is not provided, the high temperature and ultraviolet The flexible display screen has an impact and accelerates the aging speed. When the energy reduction layer 30 is provided, the energy reduction layer 30 can absorb the high temperature and ultraviolet rays, thereby avoiding the influence of the high temperature and ultraviolet rays on the flexible display screen, and improving the performance of the flexible display screen. Service life.
  • the energy reduction layer 30 can not only block the external environment (high temperature and ultraviolet) from damage to the flexible display screen, extend the service life of the flexible display screen, and can also avoid the Due to the influence of the high temperature and the ultraviolet rays, the adhesion-reducing layer sharply decreases its interface adhesion (peel strength), which causes the ultra-thin glass layer 20 to peel off the substrate 40, which affects the use of the product.
  • the energy reduction layer 30 includes but is not limited to an ultraviolet absorption layer and a heat dissipation layer.
  • the ultraviolet absorption layer is used to absorb ultraviolet rays from the external environment to reduce the absorption of ultraviolet rays by the flexible display screen.
  • the ultraviolet absorption layer can be used as a protective film to protect the ultra-thin glass layer 20 from being worn and prolong the service life.
  • the material of the ultraviolet absorption layer includes but is not limited to one or more of amorphous silicon, indium tin oxide, and indium gallium zinc oxide.
  • the heat dissipation layer is used to absorb the heat in the flexible cover 100 and quickly radiate it out of the flexible cover 100.
  • the ultraviolet absorption layer can be used as a protective film to protect the ultra-thin glass layer 20 from being damaged. Wear and prolong service life.
  • the heat dissipation layer is a graphene heat dissipation layer or a molybdenum dioxide heat dissipation layer;
  • step 2) Add ethylenediamine dropwise to the stirring material prepared in step 1), perform a hydrothermal reaction after the dispersion is uniform, and filter and dry the gel precipitate obtained by the hydrothermal reaction;
  • step 2) Calcining the dried gel precipitate in step 2) at 250-300°C for 10-25 minutes in a muffle furnace to obtain graphene-inlaid flake alumina;
  • the graphene-inlaid flake alumina prepared in step 3) is uniformly dispersed with powdered heat-resistant plastic, aluminum powder, lubricating powder, antioxidant, and plasticizer, and then extruded and calendered by a screw to form a sheet, and then stretched in both directions Stretching, quenching, and curling to finally obtain the graphene heat dissipation layer.
  • the flexible cover 100 further includes an ink layer, and the ink layer is laminated on the surface of the ultra-thin glass layer 20 away from the substrate 40.
  • the thickness of the ink layer ranges from 3 ⁇ m to 30 ⁇ m.
  • the ink layer is used to provide the flexible cover 100 with a desired appearance color, and the appearance color of the ink layer can be red, orange, yellow, green, cyan, blue, purple, pink, white, etc.
  • the ink layer may be formed by a screen printing (screen printing) process.
  • the material of the ink layer is black ink prepared by epoxy resin.
  • another embodiment of the present application further provides a flexible display screen 200, including: a flexible cover 210, a display module 220, and a bottom plate 230.
  • the display module 220 is disposed on the flexible cover 210 and Between the bottom plates 230.
  • the flexible cover 210 may be the flexible cover 100, 100a, 100b or 100c in any of the above embodiments.
  • the bottom plate 230 may use a flexible bottom plate, such as a flexible material including thin glass, metal foil, or plastic substrate, etc., for example, the plastic bottom plate has a flexible structure including coating on both sides of the base film,
  • the base film includes such as polyimide (PI), polycarbonate (PC), polyethylene glycol terephthalate (PET), polyethersulfone (PES), polyethylene film (PEN), fiber reinforced plastic (FRP) ) And so on resin.
  • the display module 220 includes a driving circuit, a pixel electrode, an organic light-emitting element, a common electrode, a gate line, a data line, etc.
  • the driving circuit includes a thin film transistor located on an island, and the drain of the thin film transistor is connected to the The pixel electrode is connected, the pixel electrode is electrically connected to one side of the organic light emitting element, and the opposite side of the organic light emitting element is electrically connected to the common electrode.
  • the driving circuit supplies current to the organic light-emitting element through the turned-on thin film transistor and pixel electrode, so that the organic light-emitting element emits light and displays the screen.
  • the display module 220 and the flexible cover 210 are encapsulated by non-conductive adhesive (NCA) technology.
  • the non-conductive adhesive is a material that does not contain conductive particles, and non-conductive adhesive ( NCP) and non-conductive film (NCF) are two types.
  • NCP non-conductive adhesive
  • NCF non-conductive film
  • the non-conductive adhesive is a non-conductive film
  • the non-conductive film is attached to the display module 220 and the flexible cover
  • pressurization causes the display module bumps to penetrate the non-conductive film directly below and directly contact the corresponding cover circuit, thereby achieving electrical connection.
  • the non-conductive film is cured by heat, and its shrinkage can fix the direct contact between the bumps of the display module and the printed lines.
  • the curing and shrinkage of the non-conductive film at a certain temperature not only ensures a stable electrical connection between the display module 220 and the flexible cover 210, but also provides a certain mechanical connection, which ensures a good package body from these two aspects. Bonding performance.
  • another embodiment of the present application further provides a display panel 300, including: a first protective layer 310, an extruded deformation layer 320, the flexible display screen 200 in any of the foregoing embodiments, and a second protective layer 340 And the pressure sensor; the extrusion deformation layer 320 is located on the first protection layer 310; the flexible display screen 200 is located on the side of the extrusion deformation layer 320 away from the first protection layer 310; the second protection layer 340 is located on the flexible display screen 200 away from the first protection layer 310 One side of the protective layer 310; the pressure sensor is located between the second protective layer 340 and the flexible display screen 200, or the pressure sensor is located between the flexible display screen 200 and the squeeze deformation layer 320.
  • the first protective layer 310 bends and squeezes the deformed layer 320, and the bending area corresponds to the squeezed
  • the compression deformation layer 320 will be compressed.
  • the compression deformation layer 320 converts the deformation force when the flexible display screen 200 is bent into a compression force, and transmits the compression force to the pressure sensor through the flexible display screen 200, and is flexible
  • the user can adjust the degree of bending of the flexible display panel 200 according to the force detected by the pressure sensor to make the flexible display panel 200 bend.
  • the force received by the fold is kept within a certain range, thereby improving the use safety of the flexible display screen 200 to a certain extent.
  • the first protective layer 310 is also used to protect the extrusion deformation layer 320 from being damaged
  • the second protective layer 340 is used to protect the pressure sensor from being damaged.
  • the second protective layer 340 can also protect the flexible display screen 200. effect.
  • the squeeze deformation layer 320 can be deformed under the action of force, when the side where the first protective layer 310 is provided in the display panel 300 is impacted, the squeeze deformation layer 320 can be deformed, which acts as a buffer. This further reduces the probability of damage to the display panel 300 when it receives an impact.
  • the flexible display 200 of the display panel 300 of the present application provides a flexible cover 100, 100a, 100b or 100c. Due to the ultra-thin characteristics of the ultra-thin glass layer, the flexible cover has Good bending characteristics, while the substrate does not affect the bending characteristics of the flexible cover plate, while improving the hardness of the flexible cover plate, the flexible cover plate composed of the ultra-thin glass layer and the substrate is While having good bending characteristics, it also has characteristics such as hardness and drop resistance, which meets the requirements for flexible cover plates in flexible display screens.

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Abstract

本申请实施例公开了一种柔性盖板、柔性显示屏及显示面板，其中柔性盖板（100），应用于柔性显示屏，包括超薄玻璃层（20）和基材（40），超薄玻璃层（20）用于贴附于柔性显示屏上，超薄玻璃层（20）具有可弯折性；基材（40）形成于超薄玻璃层（20）上，基材用于提高柔性盖板的硬度。由于超薄玻璃层（20）的超薄特性，使柔性盖板具有良好的弯折特性，同时基材（40）在不影响柔性盖板的弯折特性的同时，提高了柔性盖板的硬度，使所述由超薄玻璃层（20）和所述基材（40）共同组成的柔性盖板，在具有良好的弯折特性同时，还具有硬度、耐摔等特性。

Description

柔性盖板、柔性显示屏及显示面板 技术领域
本申请实施例涉及显示技术领域，特别是涉及一种柔性盖板、柔性显示屏及显示面板。
背景技术
随着科技的进步与社会的发展，柔性显示屏逐渐走入了消费者的视野，柔性显示屏在方便消费者生活的同时也为消费者带来了全新的用户体验。
然而，目前已开发的柔性显示屏的盖板很难做到具备传统硬屏盖板的硬度、耐摔特性的同时具有良好的弯折特性，这是因为硬度、耐摔等特性与弯折特性存在对立关系，要具备较好弯折特性必须会牺牲硬度、耐摔等特性。因此如何解决柔性显示屏的盖板在具备传统硬屏盖板的硬度特性的同时具有良好的弯折特性是柔性显示屏研究的重点方向。
发明内容
本申请实施例旨在提供一种柔性盖板、柔性显示屏及显示面板，以解决现有技术中柔性盖板不能同时满足硬度、耐摔特性的同时，具有良好的弯折特性的技术问题。
本申请实施例解决其技术问题提供以下技术方案：
一种柔性盖板，应用于柔性显示屏，所述柔性盖板包括：超薄玻璃层，所述超薄玻璃层用于贴附于所述柔性显示屏上，所述超薄玻璃层具有可弯折性；
基材，所述基材形成于所述超薄玻璃层上，所述基材用于提高所述柔性盖板的硬度。
可选地，所述柔性盖板的厚度范围为10μm～200μm。
可选地，所述柔性盖板还包括油墨层，所述油墨层层叠于超薄玻璃层远离所述基材的表面。
可选地，所述油墨层的厚度范围为3μm～30μm。
可选地，所述基材涂布于所述超薄玻璃层上；所述基材的厚度范围为1μm～100μm。
可选地，所述超薄玻璃层的厚度范围为50μm～75μm，所述超薄玻璃层的杨氏模量的范围为10～100Gpa，所述超薄玻璃层的表面硬度范围为3H～9H，所述超薄玻璃层的表面平整度不大于10nm。
可选地，所述柔性盖板还包括功能涂层，所述功能涂层包括硬化层、抗指纹层、防眩层及抗反射层中的一种或多种；
所述硬化层、所述抗指纹层、所述防眩层及所述抗反射层中的一种或多种分别层叠于所述基材或所述超薄玻璃层上。
可选地，所述功能涂层的厚度范围为1μm～20μm。
可选地，所述柔性盖板还包括胶层，所述胶层设置于所述超薄玻璃层和所述基材之间。
可选地，所述胶层为胶黏层，所述胶黏层用于减小所述柔性盖板被弯折时所受到的应力。
可选地，所述胶黏层的粘度范围为3N/inch～15N/inch；且/或，当外界摄氏温度为-40℃时，所述胶黏层贮能模量不大于2000KPa；
当外界摄氏温度为-20℃时，所述胶黏层贮能模量不大于200KPa；
当外界摄氏温度在0℃～100℃范围内时，所述胶黏层贮能模量的范围为10～60KPa。可选地，所述胶层为减粘层，所述减粘层用于在预设条件下，使所述超薄玻璃层与所述基材分离。
可选地，所述柔性盖板还包括能量降低层，所述能量降低层设置于所述基材和所述胶层之间。
可选地，所述能量降低层为紫外吸收层或散热层中的一种或两种。
本申请实施例解决其技术问题还提供以下技术方案：
一种柔性显示屏，包括：上述柔性盖板、显示模组及底板；所述显示模组设置于所述柔性盖板和所述底板之间。
本申请实施例解决其技术问题还提供以下技术方案：
一种显示面板，包括：第一保护层；
挤压变形层，所述挤压变形层位于所述第一保护层上；
上述柔性显示屏，所述柔性显示屏位于所述挤压变形层远离所述第一保护层的一侧；
第二保护层，所述第二保护层位于所述柔性显示屏远离所述第一保护层的一侧；
压力传感器，所述压力传感器位于所述第二保护层和所述挤压变形层之间。
与现有技术相比较，在本申请实施例提供的柔性盖板中，由于超薄玻璃层的超薄特性，使所述柔性盖板具有良好的弯折特性，同时基材在不影响柔性盖板的弯折特性的同时，提高了柔性盖板的硬度，使所述由超薄玻璃层和所述基材共同组成的柔性盖板，在具有良好的弯折特性同时，还具有硬度、耐摔等特性，满足了柔性显示屏中对柔性盖板的要求。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述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申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1是本申请其中一实施例提供的一种柔性盖板的结构示意图；
图2至图4是根据不同的一些实施例示出的柔性盖板的结构示意图；
图5是本申请其中一实施例提供的一种柔性显示屏的结构示意图；
图6是本申请其中一实施例提供的一种显示面板的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
请参阅图1，本申请一实施例提供的一柔性盖板100，应用于柔性显示屏，包括超薄玻璃层20及基材40，所述超薄玻璃层20用于贴附于所述柔性显示屏上，所述超薄玻璃层20具有可弯折性；由于所述超薄玻璃层20的超薄特性，使其具有良好的弯折特性，所述超薄玻璃层20在良好可弯折性的基础上，同时可具有较高硬度和/或刚度，以满足耐摔和恢复性等特性。
所述基材40形成于所述超薄玻璃层20上，所述基材40用于提高所述柔性盖板100的硬度。由于所述基材40形成于所述超薄玻璃层20且正对使用用户，所述基材40在具有预设硬度的同时，可具有耐刮、耐磨的特性。进一步地，所述基材40的材料为有机材料时，使所述基材40具备弯折特性，可进一步提高所述柔性盖板100的可弯折性。
在本实施例中，由于超薄玻璃层20的超薄特性，使所述柔性盖板100具有良好的弯折特性，同时基材40在不影响柔性盖板100的弯折特性的同时，提高了柔性盖板100的硬度，使所述由超薄玻璃层20和所述基材40共同组成的柔性盖板100，在具有良好的弯折特性同时，还具有硬度、耐摔等特性，满足了柔性显示屏中对柔性盖板100的要求。
在保证柔性盖板100具有一定硬度的基础上，为了使所述柔性盖板100具有更好的弯折特性，使所述由超薄玻璃层20和所述基材40共同组成的柔性盖板100的厚度范围为10μm～200μm，优选地，所述柔性盖板100的厚度范围为40μm～100μm。
所述超薄玻璃层20可为含碱超薄玻璃和无碱超薄玻璃，具体地，所述含碱超薄玻璃可为钠钙硅玻璃或铝硅酸盐玻璃。所述无碱超薄玻璃可为硼酸盐玻璃。
所述超薄玻璃层20经薄化(蚀刻)、强化(离子交换)达到超薄特性的要求，所述超薄玻璃层20的厚度范围可为10μm～100μm，优选地，所述超薄玻璃层20的厚度范围为50μm～75μm。
在一些实施中，为了使所述超薄玻璃层20在可弯折性的基础上，同时可具有较高硬度和/或刚度，以满足耐摔和恢复性特性。所述超薄玻璃层20的表面硬度范围为3H～9H，优选地，所述超薄玻璃层20的表面硬度范围为所4H～7H，所述超薄玻璃层20的杨氏模量(E)范围为10GPa～100GPa，优选地，所述超薄玻璃层20的杨氏模量(E)范围为50Gpa～80Gpa，所述超薄玻璃层的表面平整度不大于10nm。
以下为具体实现或制作过程，以铝硅酸盐超薄玻璃为例进行说明：
所述铝硅酸盐超薄玻璃的原料按照重量百分数包括以下成分：氧化硅60重量份，氧化铝10重量份，氧化钠11重量份，氧化镁3重量份；
所述的铝硅酸盐超薄玻璃的制备方法，包括如下步骤：
1)原料熔化：将上述铝硅酸盐超薄玻璃的原料直接加入到1300摄氏度 左右的熔窑中，形成玻璃液；
2)玻璃液澄清：将温度升高到1400-1500摄氏度，形成玻璃液，排出其中的可见气泡和溶解气体；
3)玻璃液均化：将玻璃长期处于高温(例如：1200-1300摄氏度)下，消除玻璃液中的条纹，形成均化的玻璃液；
4)玻璃液冷却：将澄清和均化后的玻璃液均匀降温，玻璃成型；
5)采用离子交换法对步骤4)制成的铝硅酸盐超薄玻璃进行处理，具体处理步骤如下：将玻璃进行超声波清洗、刷洗后对所述铝硅酸盐超薄玻璃经薄化(蚀刻)处理，然后经200～300摄氏度预热处理，然后浸入450摄氏度熔融KNO 3中进行离子交换处理。最终形成所述铝硅酸盐超薄玻璃。
所述基材40的材质可为PI(polyimide，聚酰亚胺)、CPI(colorless，无色透明聚酰亚胺)、PET(polyethylene terephthalate，聚对苯二甲酸乙二酯)、PMMA(Poly Methyl Methacrylatemethacrylic Acid，聚甲基丙烯酸甲酯)、PC(Polycarbonate，聚碳酸酯)。
为了使所述基材40形成于所述超薄玻璃层20上，并且使基材40具有一定硬度，进而提高所述柔性盖板100的硬度，可采用涂布或印刷等卷对卷(Roll to Roll)工艺在所述超薄玻璃层20上形成所述基材40。所述基材40的表面硬度范围为1H～5H，优选地，所述基材40的表面硬度范围为3H～4H。
为了使所述基材40具备一定的弯折特性，进一步提高了所述柔性盖板100的可弯折性，使所述基材40的杨氏模量(E)范围为2Gpa～10Gpa，优选地，所述基材40的杨氏模量(E)范围为5～7Gpa，所述基材40的厚度范围为10～100μm，优选地，所述基材40的厚度范围为20～60μm。
请参阅图2，本申请一些实施例提供的柔性盖板100a与图1所示的柔性盖板100基本相同，区别在于所述柔性盖板100还包括功能涂层60，所述功能涂层60涂覆于所述基材40背向所述超薄玻璃层20的表面上，所述功能涂层60包括硬化层、抗指纹层、防眩层及抗反射层中的一种或多种。所述硬化 层、抗指纹层、防眩层及抗反射层的其中一个层叠涂覆或其中多个依次层叠涂覆于所述基材40背向所述超薄玻璃层20的表面上，当所述功能涂层60包括多种涂层时，多种所述涂层的层叠顺序可根据实际情况的需要进行设置，在此不进行限定。由于上述不同类型的涂层使用的材质是不同的，所对应的用途也是不同的，在实际的应用中，为了实现不同的功能，可选取一种或多种所述涂层涂覆于所述基材40背向所述超薄玻璃层20的表面上。
具体地，所述硬化层用于保护所述基材40，提高所述柔性盖板100的耐刮、耐磨特性，所述硬化层的材质可为金属氮化物，也可由纯金属或金属碳或金属、氮化物和碳的任意组合构成，也可以是所谓的DLC-层(类金刚石层)。
具体地，所述抗指纹层用于提升所述柔性盖板100的抗污性能，所述抗指纹层能够减少指纹、油污、灰尘、水等粘附在所述柔性盖板100上。所述抗指纹层的材质可为有机氟化物。
具体地，所述防眩层用于控制光散射/光反射以抑制图像显示装置的可见性的劣化，所述防眩层的材质可为第二基于(甲基)丙烯酸酯的交联聚合物的第二粘合剂、和分散在第二粘合剂上的具有亚微米(亚μm)级的至少两种透光细颗粒。
具体地，所述抗反射层用于利用光的散射或光学干涉来减少图像的反射和光的反射，所述抗反射层的材质可为聚乙烯醇膜(polyvinyl alcohol，简称PVA)，但不以此为限，也可以用液晶中添加颜料来替代，以便进一步降低厚度。所述抗反射层的厚度范围是3um至50um，但不以此为限。
在一些实施例中，所述功能涂层60还可为增透射层、遮光层及保护层等等。可根据所需要实现的功能，任意择取其中一个或多种层叠涂覆于所述基材40背向所述超薄玻璃层20的表面上。
具体地，所述增透射层能够增强柔性盖板100的颜色的通透度，并且增透射层还能够增强盖板100底相明亮感并以及柔性盖板100的外观颜色的明艳度。增透射层可以通过电镀的方式形成。增透射层的材料包括氧化硅及氧 化钛。
请参阅图3，本申请一些实施例提供的柔性盖板100b与图1所示的柔性盖板100基本相同，区别在于所述柔性盖板100b还包括胶层80，所述胶层80设置于所述超薄玻璃层20和所述基材40之间。所述胶层80可为胶黏层也可为减粘层。
当所述柔性盖板100弯折过程时，为了降低超薄玻璃层20和基材40所受到应力，同时进一步提高所述柔性盖板100的弯折特性，可将所述胶层80设置为胶黏层，所述超薄玻璃层20和所述基材40通过所述胶黏层粘附在一起，当所述柔性盖板100弯折过程时，所述胶黏层可产生粘附力，从而可分担所述超薄玻璃层20和基材40在弯折时所受到应力，进而降低所述超薄玻璃层20和基材40在弯折时所受到应力，提高所述柔性盖板100的弯折特性。
为了更好的使所述胶黏层降低超薄玻璃层20和基材40所受到应力，设置所述胶黏层的粘度范围为3N/inch～20N/inch，优选地，所述胶黏层的粘度范围为6N/inch～12N/inch；当外界摄氏温度为-40℃时，所述胶黏层贮能模量不大于2000KPa；当外界摄氏温度为-20℃时，所述胶黏层贮能模量不大于200KPa；当外界摄氏温度在0℃～100℃范围内时，所述胶黏层贮能模量的范围为10～60KPa。
所述胶黏层的材质可为光学胶、压敏胶及胶黏剂等的一种，所述胶黏层的成分包含但不限定丙烯酸系化合物，硅胶系化合物，橡胶系化合物等的一种或多种。
为了当所述基材40受到损伤或破坏，解决重复加工问题，可将所述胶层80设置为减粘层，在光照(UV光/激光等)、加热及电压等条件下，所述减粘层分解或产生气体，致使所述减粘层的界面黏附力(剥离强度)急剧的下降，所述减粘层的粘性可下降至1-50g/inch。以使所述超薄玻璃层20从所述基材40上剥离而不破坏超薄玻璃层20的界面，进而解决了重复加工的问题，降低了重复加工的成本。
所述减粘层可为UV减粘层、激光减粘层及加热减粘层等等，在本实施例中，所述减粘层为UV减粘层，主要由按重量百分比计的如下原料制成：丙烯酸酯压敏胶树脂20％-50％、多官能度低聚物和/或多官能度单体1％-30％、交联剂0.3％-2％、抗静电剂0.1％-5％、分散剂0-2％、流平剂0.2％-2％、光引发剂0.5％-5％和溶剂25％-60％。本申请一种优选的具体实施例中，所述丙烯酸酯压敏胶树脂为溶剂型丙烯酸酯压敏胶粘剂。更优选的，所述丙烯酸酯压敏胶树脂的分子量为10万-200万。进一步，优选的，所述溶剂型丙烯酸酯压敏胶粘剂的固含量为20％-60％，粘度为200cps-20000cps。采用特定的丙烯酸酯压敏胶树脂，有助于提高所述UV减粘层的剥离力和内聚力。
为了进一步提高减粘层的减粘性能，同时提高所述减粘层的铺展性能、固化性能及其他物理性能，减粘层的材质包括但不限于Slitech公司的Silsurf A010-D、Silub TMP D218、Silquat D208-CDA、Silmer OH C50、Silmer ACR D208、Silmer NCO Di-100、Silmer EP Di-50、毕克公司的UV3500系列产品、赢创公司的UV2700系列产品、迈图公司的UV9300、UV9430、蓝星公司的POLY360及PLOY200中一种或几种。
请参阅图4，本申请一些实施例提供的柔性盖板100c与图3所示的柔性盖板100b基本相同，区别在于所述柔性盖板100c还包括能量降低层30，所述能量降低层30设置于所述胶层80和所述基材40之间。所述能量降低层30可为紫外吸收层和/或散热层。
当所述胶层80为胶黏层时，所述能量降低层30可阻挡外界环境(高温及紫外线)对柔性显示屏的损害，延长所述柔性显示屏的使用寿命。例如，当夏日正午，外界环境的温度较高且紫外线照射的强度较大，所述柔性显示屏暴露于此外界环境下，如未设置所能量降低层30，则所述高温和紫外线会所述柔性显示屏产生影响，加快老化的速度。当设置所述能量降低层30时，所述能量降低层30可吸收所述高温和紫外线，从而避免了所述高温和紫外线对所述柔性显示屏产生的影响，提高了所述柔性显示屏的使用寿命。
当所述胶层80为减粘层时，所述能量降低层30不仅可阻挡外界环境(高温及紫外线)对柔性显示屏的损害，延长所述柔性显示屏的使用寿命，还可以避免所述减粘层因为所述高温和所述紫外线的影响致使其界面黏附力(剥离强度)急剧的下降，使所述超薄玻璃层20从所述基材40上剥离，影响了产品的使用。
能量降低层30包括但不限定于紫外吸收层和散热层等。
所述紫外吸收层用于吸收外界环境的紫外线，以减少柔性显示屏对紫外线的吸收，同时所述紫外吸收层可作为保护膜，保护所述超薄玻璃层20不被磨损，延长使用寿命。
所述紫外吸收层的材质包括但不限定于非晶硅、氧化铟锡、铟稼锌氧化物中的一种或几种。
所述散热层用于吸收所述柔性盖板100中的热量，并迅速散发出所述柔性盖板100外，同时所述紫外吸收层可作为保护膜，保护所述超薄玻璃层20不被磨损，延长使用寿命。
为了提高所述散热层的散热效率，同时实现横向散热/传热，纵向不散热/传热的效果，在本实施例中，所述散热层为石墨烯散热层或二氧化钼散热层；
以石墨烯散热层为例，具体制备步骤如下：
1)将石墨烯分散于有机溶剂，超声分散处理后，加入铝盐和三乙醇胺，高速搅拌30-60min；
2)向步骤1)制备得到的搅拌物中滴加乙二胺，分散均匀后进行水热反应，将水热反应得到的凝胶沉淀物进行过滤干燥处理；
3)将步骤2)中经干燥处理的凝胶沉淀物在马弗炉中在250-300℃煅烧10-25min，得到镶嵌石墨烯的片状氧化铝；
4)将步骤3)制备的镶嵌石墨烯的片状氧化铝与粉末状耐高温塑料、铝粉、润滑粉、抗氧剂、增塑剂分散均匀，经螺杆挤出压延形成片，然后双向拉伸、急冷，卷曲，最终得到所述石墨烯散热层。
在一些实施例中，所述柔性盖板100还包括油墨层，所述所述油墨层层叠于超薄玻璃层20远离所述基材40的表面。所述油墨层的厚度范围为3μm～30μm。
所述油墨层用于给所述柔性盖板100提供所需要的外观颜色，所述油墨层的外观颜色可以为红色、橙色、黄色、绿色、青色、蓝色、紫色、粉色、白色等。油墨层可以通过丝印(丝网印刷，Screen Printing)工艺形成，在本实施例中，所述油墨层的材料为由环氧树脂调制形成的黑色油墨。
请参阅图5，本申请另一实施例还提供一种柔性显示屏200，包括：柔性盖板210、显示模组220及底板230，所述显示模组220设置于所述柔性盖板210和所述底板230之间。柔性盖板210可为上述任一实施例中的所述柔性盖板100、100a、100b或100c。
所述底板230可以使用柔性底板，所述柔性底板诸如包括薄玻璃、金属箔片或塑料基底等等具有柔性的材料，例如，塑料底板具有包括涂覆在基膜的两侧上的柔性结构，基膜包括诸如聚酰亚胺(PI)、聚碳酸酯(PC)、聚乙二醇对酞酸酯(PET)、聚醚砜(PES)、聚乙烯薄膜(PEN)、纤维增强塑料(FRP)等等树脂。
所述显示模组220包括驱动电路、像素电极、有机发光元件、公共电极、栅极线和数据线等，所述驱动电路包括位于岛状部上的薄膜晶体管，所述薄膜晶体管的漏极与所述像素电极相连，所述像素电极与所述有机发光元件的一侧电连接，所述有机发光元件相对的另一侧与所述公共电极电连接。栅极线向驱动电路传输扫描信号、数据线向驱动电路传输数据信号后，驱动电路通过导通的薄膜晶体管和像素电极向有机发光元件提供电流，以使有机发光元件发光、进行画面的显示。
在本实施例中，所述显示模组220与所述柔性盖板210之间采用非导电胶(NCA)技术封装，所述非导电胶是不含导电颗粒的材料，可采用非导电胶(NCP)和非导电膜(NCF)两种类型，在本实施例中，所述非导电胶采用 的是非导电膜，所述非导电膜被贴合于所述显示模组220与所述柔性盖板210之间，加压使显示模组凸点穿透其正下方的所述非导电膜而与对应的盖板线路直接接触，由此实现电连接。所述非导电膜受热固化，其收缩可以固定显示模组凸点和印制线间的直接接触。所述非导电膜在一定温度下的固化收缩不仅能保证了显示模组220和柔性盖板210之间稳定的电连接，还提供了一定的机械连接，从这两方面保证了封装体良好的键合性能。
请参阅图6，本申请另一实施例还提供一种显示面板300，包括：第一保护层310、挤压变形层320、上述任一实施例中的柔性显示屏200，第二保护层340和压力传感器；挤压变形层320位于第一保护层310上；柔性显示屏200位于挤压变形层320远离第一保护层310的一侧；第二保护层340位于柔性显示屏200远离第一保护层310的一侧；压力传感器位于第二保护层340与柔性显示屏200之间，或者压力传感器位于柔性显示屏200与挤压变形层320之间。
将压力传感器设置在柔性显示屏200和第二保护层340之间后，在柔性显示屏200发生弯折时，第一保护层310弯曲并挤压挤压变形层320，弯折区域对应的挤压变形层320会被压缩，此时挤压变形层320将弯折柔性显示屏200时的形变力转变为了挤压力，并通过柔性显示屏200将挤压力传递到压力传感器上，并且柔性显示屏200弯折的程度越大，则传递至压力传感器上的力也就越大，用户可以根据压力传感器检测到的力的大小调整柔性显示面板200的弯折程度，使柔性显示屏200的弯折处受到的力保持在一定范围内，从而在一定程度上提高了柔性显示屏200的使用安全性。其中，第一保护层310还用于保护挤压变形层320不被损坏，第二保护层340用于保护压力传感器不被损坏，该第二保护层340还能够起到保护柔性显示屏200的作用。并且，由于挤压变形层320在力的作用下能够发生形变，因此当显示面板300中设置有第一保护层310的一侧受到撞击时，挤压变形层320能够发生形变，起到缓冲的作用，进而降低了显示面板300收到撞击时损坏的概率。
与现有技术相比较，本申请显示面板300的柔性显示屏200中提供了一种柔性盖板100、100a、100b或100c，由于超薄玻璃层的超薄特性，使所述柔性盖板具有良好的弯折特性，同时基材在不影响柔性盖板的弯折特性的同时，提高了柔性盖板的硬度，使所述由超薄玻璃层和所述基材共同组成的柔性盖板，在具有良好的弯折特性同时，还具有硬度、耐摔等特性，满足了柔性显示屏中对柔性盖板的要求。
最后应说明的是：以上实施例仅用以说明本申请的技术方案，而非对其限制；在本申请的思路下，以上实施例或者不同实施例中的技术特征之间也可以进行组合，步骤可以以任意顺序实现，并存在如上所述的本申请的不同方面的许多其它变化，为了简明，它们没有在细节中提供；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (16)

  1. 一种柔性盖板，应用于柔性显示屏，其特征在于，所述柔性盖板包括：
    超薄玻璃层，所述超薄玻璃层用于贴附于所述柔性显示屏上，所述超薄玻璃层具有可弯折性；
    基材，所述基材形成于所述超薄玻璃层上，所述基材用于提高所述柔性盖板的硬度。
  2. 根据权利要求1所述的柔性盖板，其特征在于，
    所述柔性盖板的厚度范围为10μm～200μm。
  3. 根据权利要求1所述的柔性盖板，其特征在于，
    所述柔性盖板还包括油墨层，所述油墨层层叠于所述超薄玻璃层远离所述基材的表面上。
  4. 根据权利要求1所述的柔性盖板，其特征在于，
    所述油墨层的厚度范围为3μm～30μm。
  5. 根据权利要求1所述的柔性盖板，其特征在于，
    所述基材涂布于所述超薄玻璃层上；
    所述基材的厚度范围为1μm～100μm。
  6. 根据权利要求1-5任一项所述的柔性盖板，其特征在于，
    所述超薄玻璃层的厚度范围为50μm～75μm，所述超薄玻璃层的杨氏模量的范围为10～100Gpa，所述超薄玻璃层的表面硬度范围为3H～9H，所述超薄玻璃层的表面平整度不大于10nm。
  7. 根据权利要求1-5任一项所述的柔性盖板，其特征在于，
    所述柔性盖板还包括功能涂层，所述功能涂层包括硬化层、抗指纹层、防眩层及抗反射层中的一种或多种；
    所述硬化层、所述抗指纹层、所述防眩层及所述抗反射层中的一种或多种分别层叠于所述基材或所述超薄玻璃层上。
  8. 根据权利要求7所述的柔性盖板，其特征在于，
    所述功能涂层的厚度范围为1μm～20μm。
  9. 根据权利要求1-5任一项所述的柔性盖板，其特征在于，
    所述柔性盖板还包括胶层，所述胶层设置于所述超薄玻璃层和所述基材之间。
  10. 根据权利要求9所述的柔性盖板，其特征在于，
    所述胶层为胶黏层，所述胶黏层用于减小所述柔性盖板被弯折时所受到的应力。
  11. 根据权利要求10所述的柔性盖板，其特征在于，
    所述胶黏层的粘度范围为3N/inch～15N/inch；且/或，当外界摄氏温度为-40℃时，所述胶黏层贮能模量不大于2000KPa；
    当外界摄氏温度为-20℃时，所述胶黏层贮能模量不大于200KPa；
    当外界摄氏温度在0℃～100℃范围内时，所述胶黏层贮能模量的范围为10～60KPa。
  12. 根据权利要求11所述的柔性盖板，其特征在于，
    所述胶层为减粘层，所述减粘层用于在预设条件下，使所述超薄玻璃层与所述基材分离。
  13. 根据权利要求12所述的柔性盖板，其特征在于，
    所述柔性盖板还包括能量降低层，所述能量降低层设置于所述基材和所述胶层之间。
  14. 根据权利要求13所述的柔性盖板，其特征在于，
    所述能量降低层为紫外吸收层或散热层中的一种或两种。
  15. 一种柔性显示屏，其特征在于，包括：
    如权利要求1至14任一项所述的柔性盖板、显示模组及底板；
    所述显示模组设置于所述柔性盖板和所述底板之间。
  16. 一种显示面板，其特征在于，包括：
    第一保护层；
    挤压变形层，所述挤压变形层位于所述第一保护层上；
    如权利要求15所述的柔性显示屏，所述柔性显示屏位于所述挤压变形层远离所述第一保护层的一侧；
    第二保护层，所述第二保护层位于所述柔性显示屏远离所述第一保护层的一侧；
    压力传感器，所述压力传感器位于所述第二保护层和所述挤压变形层之间。
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CN113035065A (zh) * 2021-03-05 2021-06-25 京东方科技集团股份有限公司 盖板和显示装置
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