WO2020124741A1 - 柔性显示装置 - Google Patents

柔性显示装置 Download PDF

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Publication number
WO2020124741A1
WO2020124741A1 PCT/CN2019/073235 CN2019073235W WO2020124741A1 WO 2020124741 A1 WO2020124741 A1 WO 2020124741A1 CN 2019073235 W CN2019073235 W CN 2019073235W WO 2020124741 A1 WO2020124741 A1 WO 2020124741A1
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WIPO (PCT)
Prior art keywords
flexible display
layer
fluid layer
display device
viscoelastic fluid
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2019/073235
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English (en)
French (fr)
Inventor
夏明勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/344,857 priority Critical patent/US11308827B2/en
Publication of WO2020124741A1 publication Critical patent/WO2020124741A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133331—Cover glasses
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—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 being semiconductor devices, e.g. diodes
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/868—Arrangements for polarized light emission
    • 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
    • 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
    • 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
    • H10K59/8793—Arrangements for polarized light emission
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F39/00—Integrated devices, or assemblies of multiple devices, comprising at least one element covered by group H10F30/00, e.g. radiation detectors comprising photodiode arrays
    • H10F39/10—Integrated devices
    • H10F39/12—Image sensors
    • H10F39/198—Contact-type image sensors [CIS]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • 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
    • H10K59/40—OLEDs integrated with touch screens
    • 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
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present disclosure relates to the field of display technology, and particularly to a flexible display device.
  • the existing flexible foldable display device has softer materials for each film layer, the outer layer is not protected by glass, and its impact resistance is poor. Moreover, the bending part of the flexible foldable display device adopts hinge transmission, and the auxiliary screen is pulled when it is bent, but in the flattened state, the middle area of the flexible foldable display device lacks support, so the flexible foldable display When the device is dropped, the damage of the hinge to the entire flexible foldable display device is also fatal.
  • the existing flexible foldable display device has softer materials for each film layer, the outer layer is not protected by glass, and its impact resistance is poor. Moreover, the bending part of the flexible foldable display device adopts hinge transmission, and the auxiliary screen is pulled when it is bent, but in the flattened state, the middle area of the flexible foldable display device lacks support. Therefore, the flexible foldable display device When the device is dropped, the damage of the hinge to the entire flexible foldable display device is also fatal.
  • the present disclosure provides a flexible display device.
  • the flexible display device includes a housing, a flexible display panel, and a cover window.
  • the flexible display panel is provided on the housing.
  • the cover window is provided on the flexible display panel.
  • the first viscoelastic fluid layer is disposed between the cover window and the flexible display panel.
  • the thickness of the first viscoelastic fluid layer is less than or equal to 25 ⁇ m.
  • the dispersion system of the first viscoelastic fluid layer includes a plurality of reinforcing particles and an organic solvent, the reinforcing particles are distributed in the organic solvent, and the matrix structure of the first viscoelastic fluid layer is a fiber structure.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, and an encapsulation layer that are sequentially arranged from bottom to top, and the first viscoelastic fluid layer is disposed on the cover window and the Said between the encapsulation layers.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, an encapsulation layer, and a polarizer arranged sequentially from bottom to top, and the first viscoelastic fluid layer is disposed on the cover Between the window and the polarizer.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, an encapsulation layer, a polarizer, and a touch layer that are sequentially arranged from bottom to top, and the first viscoelastic fluid layer is disposed Between the cover window and the touch control layer.
  • the flexible display device further includes a hinge structure and a second viscoelastic fluid layer, both of which are disposed in the housing, and the hinge structure is disposed between the flexible display panel and the first Between the two viscoelastic fluid layers, the first viscoelastic fluid layer is a first non-Newtonian fluid layer, and the second viscoelastic fluid layer is a second non-Newtonian fluid layer.
  • materials of the first non-Newtonian fluid layer and the second non-Newtonian fluid layer include a polymer and a plurality of reinforcing particles.
  • the particle size of the single reinforcing particles is less than or equal to 10 ⁇ m.
  • the ratio of the reinforcing particles to the organic solvent is 2:1.
  • the present disclosure also provides a flexible display device.
  • the flexible display device includes a housing, a flexible display panel, and a cover window.
  • the flexible display panel is provided on the housing.
  • the cover window is provided on the flexible display panel.
  • the first viscoelastic fluid layer is disposed between the cover window and the flexible display panel.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, and an encapsulation layer that are sequentially arranged from bottom to top, and the first viscoelastic fluid layer is disposed on the cover window and the Said between the encapsulation layers.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, an encapsulation layer, and a polarizer arranged sequentially from bottom to top, and the first viscoelastic fluid layer is disposed on the cover Between the window and the polarizer.
  • the flexible display panel includes a flexible substrate, an organic light-emitting layer, an encapsulation layer, a polarizer, and a touch layer that are sequentially arranged from bottom to top, and the first viscoelastic fluid layer is disposed Between the cover window and the touch control layer.
  • the flexible display device further includes a hinge structure and a second viscoelastic fluid layer, both of which are disposed in the housing, and the hinge structure is disposed between the flexible display panel and the first Between the two viscoelastic fluid layers, the first viscoelastic fluid layer is a first non-Newtonian fluid layer, and the second viscoelastic fluid layer is a second non-Newtonian fluid layer.
  • materials of the first non-Newtonian fluid layer and the second non-Newtonian fluid layer include a polymer and a plurality of reinforcing particles.
  • the thickness of the first viscoelastic fluid layer is less than or equal to 25 ⁇ m.
  • the dispersion system of the first viscoelastic fluid layer includes a plurality of reinforcing particles and an organic solvent, the reinforcing particles are distributed in the organic solvent, and the The matrix structure is a fiber structure.
  • the particle size of the single reinforcing particles is less than or equal to 10 ⁇ m.
  • the ratio of the reinforcing particles to the organic solvent is 2:1.
  • the first viscoelastic fluid layer is disposed between the cover window and the flexible display panel.
  • the first viscoelastic fluid layer has flexibility in a normal state and can meet the requirements of dynamic bending. When subjected to external impact, due to shear thickening, it can effectively block external impact and protect the flexible display device.
  • the second viscoelastic fluid layer By filling the second viscoelastic fluid layer in the housing provided with the hinge structure, damage to the hinge structure due to falling can be reduced, and the service life of the flexible display device can be increased.
  • FIG. 1 shows a schematic diagram of an expanded state of a flexible display device according to an embodiment of the present disclosure
  • FIG. 2 shows a schematic diagram of a folded state of a flexible display device according to an embodiment of the present disclosure
  • FIG. 3 shows a schematic diagram of changes of a flexible display device according to an embodiment of the present disclosure when impacted
  • FIG. 4 shows a schematic diagram of an expanded state of a flexible display device according to an embodiment of the present disclosure
  • FIG. 5 shows a schematic diagram of the expanded state of the flexible display device according to an embodiment of the present disclosure
  • FIG. 6 shows a schematic diagram of an expanded state of a flexible display device according to an embodiment of the present disclosure
  • FIG. 7 shows a schematic diagram of a second viscoelastic fluid layer disposed in a housing according to an embodiment of the present disclosure.
  • FIG. 8 shows a schematic structural diagram of a first viscoelastic fluid layer according to an embodiment of the present disclosure.
  • the flexible display device 10 of the exemplary embodiment of the present disclosure includes a housing 100, a flexible display panel 200, a cover window 300 and a first viscoelastic fluid layer 400.
  • the flexible display panel 200 is disposed on the casing 100.
  • the cover window 300 is disposed on the flexible display panel 200.
  • the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the flexible display panel 200.
  • the flexible display device 10 may be, for example, an organic light emitting diode device, and may be applied to electronic devices such as mobile phones, televisions, and tablet computers.
  • the unfolded and folded state of the flexible display device 10 is shown in FIGS. 1 and 2.
  • the first viscoelastic fluid layer 400 has flexibility and can assist the bending of the flexible display panel 200
  • the flexible display device 10 has a good resistance to deformation. Since the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the flexible display panel 200.
  • the first viscoelastic fluid layer 400 is flexible under normal conditions, and can meet the requirements of dynamic bending (an example is shown in FIG. 2). When subjected to external impact, it can effectively block external impact due to shear thickening characteristics Force 20 protects the flexible display device (an example is shown in FIG. 3).
  • the first viscoelastic fluid layer 400 is disposed below the cover window 300, but is not limited to this position, and may also be placed between other film layers of the flexible display device 10 to enhance the flexible display device 10. Reliability when impacted or dropped can increase the height of the falling ball of the flexible display device.
  • the flexible display device 10 further includes a hinge structure 500 and a second viscoelastic fluid layer 600, both of which are disposed in the housing 100.
  • the hinge structure 500 is disposed between the flexible display panel 200 and the second viscoelastic fluid layer 600.
  • the shell is made of a metal material, for example, to have light weight, bending resistance and good impact resistance, and to increase the service life of the bending mechanism.
  • the first viscoelastic fluid layer 400 is a first non-Newtonian fluid layer
  • the second viscoelastic fluid layer 600 is a second non-Newtonian fluid layer.
  • the material of the first non-Newtonian fluid layer and the second non-Newtonian fluid layer includes a polymer and a plurality of reinforcing particles.
  • the polymer may include high-temperature polyimide (polyimide, PI)
  • the reinforcing particles may include silica
  • the diameter of the reinforcing particles is on the micrometer level.
  • the particle size of the single reinforcing particles is less than or equal to 10 ⁇ m.
  • the thickness of the first viscoelastic fluid layer 400 is less than or equal to 25 ⁇ m.
  • the dispersion system of the first viscoelastic fluid layer includes a plurality of reinforcing particles and an organic solvent, the reinforcing particles are distributed in the organic solvent, and the matrix structure of the first viscoelastic fluid layer is a fiber structure.
  • the particle size of the single reinforcing particles is less than or equal to 10 ⁇ m.
  • the ratio of the reinforcing particles to the organic solvent is 2:1, and the ratio can be adjusted to meet different usage requirements.
  • the flexible display panel 200 includes a flexible substrate 210, an organic light-emitting layer 220, and an encapsulation layer 230 that are sequentially arranged from bottom to top, and the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the encapsulation layer 230.
  • the flexible display panel 200 includes a flexible substrate 210, an organic light-emitting layer 220, an encapsulation layer 230, and a polarizer 240 that are sequentially arranged from bottom to top.
  • the first The viscoelastic fluid layer 400 is disposed between the cover window 300 and the polarizer 240.
  • the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the polarizer 240, however, the first viscoelastic fluid layer 400 is not limited to being disposed on the cover
  • the window 300 and the polarizer 240 may also be placed between other film layers.
  • the first viscoelastic fluid layer 400 may be disposed between the film layers of the flexible display device 10 by coating.
  • the flexible display panel 200 includes a flexible substrate 210, an organic light-emitting layer 220, an encapsulation layer 230, a polarizer 240, and a touch layer 250 that are sequentially arranged from bottom to top
  • the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the touch layer 250.
  • FIG. 7 shows a schematic diagram of a second viscoelastic fluid layer disposed in a housing according to an embodiment of the present disclosure.
  • the second viscoelastic fluid layer 600 is disposed in the housing 100. Specifically, the second viscoelastic fluid layer 600 is surrounded by the bottom surface of the housing 100 and a plurality of side walls. The second viscoelastic fluid layer 600 is at the same level as the side wall of the casing 100.
  • FIG. 8 shows a schematic structural diagram of a first viscoelastic fluid layer according to an embodiment of the present disclosure.
  • the first viscoelastic fluid layer 400 has shear thickening characteristics, and the dispersion system of the first viscoelastic fluid layer 400 includes reinforcing particles and an organic solvent.
  • the reinforcing particles of this dispersion system are used to increase the hardness of the first viscoelastic fluid layer 400, and the organic solvent is used to disperse the flow of the reinforcing particles so that the reinforcing particles are evenly distributed.
  • the reinforcing particles in the non-Newtonian fluid can be extremely fine and uniformly distributed in the organic solvent. Both ends of the first viscoelastic fluid layer 400 may have barrier layers.
  • the matrix structure is a fiber structure, and the fibers soaked with this dispersion system have a large resistance when subjected to severe impact.
  • the types of reinforcing particles include but are not limited to extremely fine SiO2 particles, and the types of solvents include but are not limited to polyethylene glycol.
  • the material selected for the first viscoelastic fluid layer 400 may require its refractive index and density to be similar to OCA optically clear adhesive to ensure that the overall display effect of the flexible display device 10 is not affected.
  • the first viscoelastic fluid layer 400 includes two states (a soft state and a relatively rigid state). When not subjected to an impact, the soft state is maintained and when subjected to an impact, it exhibits a strong shear increase. A thick state with thick behavior.
  • the first viscoelastic fluid layer 400 when the first viscoelastic fluid layer 400 is in a soft state, the elastic modulus and Poisson are relatively low, and after a large deformation occurs, it can be restored to the initial state.
  • the first viscoelastic fluid layer 400 includes but is not limited to porous polymers and hollow transparent electrode materials.
  • the first viscoelastic fluid layer 400 and the second viscoelastic fluid layer 600 may be the same material or different materials. Both the first viscoelastic fluid layer 400 and the second viscoelastic fluid layer 600 have shear thickening properties, and the second viscoelastic fluid layer 600 may not be as compared to the first viscoelastic fluid layer 400 With good optical characteristics. Since the second viscoelastic fluid layer 600 is disposed in the housing 100, and the first viscoelastic fluid layer 400 is disposed between the cover window 300 and the flexible display panel 200, the second viscoelastic fluid layer Compared with the first viscoelastic fluid layer 400, the fluid layer 600 does not affect the overall display effect of the flexible display device 10.
  • the flexible display device 10 has many advantages such as lightness, thinness, and portability.
  • the embodiments of the present disclosure provide the first viscoelastic fluid layer 400 with shear thickening characteristics, which is flexible when normally bent and unfolded. Coordinate the deformation of each film layer of the flexible display device 10, thereby eliminating the peeling phenomenon during the bending of the flexible display device 10, and having strong resistance when subjected to external impact (such as falling balls, falling, etc.)
  • the external force capability can increase the height of the falling ball of the screen, protect the hinge structure 500 of the bending mechanism from damage, increase the life of the flexible display device 10, enhance the user experience, and meet the mass production index of the flexible display device 10. It can bring higher economic benefits to the flexible display industry.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

一种柔性显示装置（10），包括外壳（100）、柔性显示面板（200）、盖窗（300）和第一粘弹性流体层（400）。柔性显示面板（200）设置在外壳（100）上。盖窗（300）设置在柔性显示面板（200）上。第一粘弹性流体层（400）设置在盖窗（300）和柔性显示面板（200）之间。

Description

柔性显示装置 技术领域
本揭示涉及显示技术领域，特别涉及一种柔性显示装置。
 背景技术
目前，人们对手机、平板电脑、智能穿戴设备等电子产品越来越来越依赖。为了增强用户体验及提升产品竞争力，采用大屏幕化已经成为一种发展的趋势。而对于大屏幕的电子设备的携带不便问题，柔性可折叠显示装置应运而生，其可以将移动设备折叠为小尺寸的形态。随着柔性可折叠的显示技术的发展，柔性可折叠显示装置的结构研究也在进行。
现有的柔性可折叠显示装置为了满足弯折性的要求，各膜层材料较软，外层没有玻璃的保护，抗冲击能力较差。而且柔性可折叠显示装置的弯曲部位采用铰链(hinge)传动，辅助屏幕在弯折时受到的拉扯，但在展平状态时，柔性可折叠显示装置的中间区域缺少支撑，因此，柔性可折叠显示装置在跌落时，铰链受到损伤对整个柔性可折叠显示装置的影响也是致命的。
故，有需要提供一种柔性显示装置，以解决现有技术存在的问题。
 技术问题
现有的柔性可折叠显示装置为了满足弯折性的要求，各膜层材料较软，外层没有玻璃的保护，抗冲击能力较差。而且柔性可折叠显示装置的弯曲部位采用铰链(hinge)传动，辅助屏幕在弯折时受到的拉扯，但在展平状态时，柔性可折叠显示装置的中间区域缺少支撑，因此，柔性可折叠显示装置在跌落时，铰链受到损伤对整个柔性可折叠显示装置的影响也是致命的。
 技术解决方案
为解决上述技术问题，本揭示提供柔性显示装置。所述柔性显示装置包括外壳、柔性显示面板以及盖窗。所述柔性显示面板设置在所述外壳上。所述盖窗设置在所述柔性显示面板上。所述第一粘弹性流体层设置在所述盖窗和所述柔性显示面板之间。所述第一粘弹性流体层的厚度小于或等于25μm。所述第一粘弹性流体层的分散体系包括多个增强粒子和有机溶剂，所述增强粒子分布于所述有机溶剂，所述第一粘弹性流体层的基体结构为纤维结构。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层和封装层，所述第一粘弹性流体层设置在所述盖窗和所述封装层之间。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层和偏光片，所述第一粘弹性流体层设置在所述盖窗和所述偏光片之间。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层、偏光片和触控层，所述第一粘弹性流体层设置在所述盖窗和所述触控层之间。
于本揭示其中的一实施例中，所述柔性显示装置还包括铰链结构和第二粘弹性流体层，均设置于所述外壳中，所述铰链结构设置在所述柔性显示面板和所述第二粘弹性流体层之间，所述第一粘弹性流体层是第一非牛顿流体层，所述第二粘弹性流体层是第二非牛顿流体层。
于本揭示其中的一实施例中，所述第一非牛顿流体层和所述第二非牛顿流体层的材料包括聚合物和多个增强粒子。
于本揭示其中的一实施例中，单个所述增强粒子的粒径小于或等于10μm。
于本揭示其中的一实施例中，所述增强粒子和所述有机溶剂的比例为2:1。
本揭示还提供柔性显示装置。所述柔性显示装置包括外壳、柔性显示面板以及盖窗。所述柔性显示面板设置在所述外壳上。所述盖窗设置在所述柔性显示面板上。所述第一粘弹性流体层设置在所述盖窗和所述柔性显示面板之间。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层和封装层，所述第一粘弹性流体层设置在所述盖窗和所述封装层之间。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层和偏光片，所述第一粘弹性流体层设置在所述盖窗和所述偏光片之间。
于本揭示其中的一实施例中，所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层、偏光片和触控层，所述第一粘弹性流体层设置在所述盖窗和所述触控层之间。
于本揭示其中的一实施例中，所述柔性显示装置还包括铰链结构和第二粘弹性流体层，均设置于所述外壳中，所述铰链结构设置在所述柔性显示面板和所述第二粘弹性流体层之间，所述第一粘弹性流体层是第一非牛顿流体层，所述第二粘弹性流体层是第二非牛顿流体层。
于本揭示其中的一实施例中，所述第一非牛顿流体层和所述第二非牛顿流体层的材料包括聚合物和多个增强粒子。
于本揭示其中的一实施例中，所述第一粘弹性流体层的厚度小于或等于25μm。
于本揭示其中的一实施例中，所述第一粘弹性流体层的分散体系包括多个增强粒子和有机溶剂，所述增强粒子分布于所述有机溶剂，所述第一粘弹性流体层的基体结构为纤维结构。
于本揭示其中的一实施例中，单个所述增强粒子的粒径小于或等于10μm。
于本揭示其中的一实施例中，所述增强粒子和所述有机溶剂的比例为2:1。
 有益效果
相较于现有技术，为解决上述技术问题，本揭示的实施例的柔性显示装置中，所述第一粘弹性流体层设置在所述盖窗和所述柔性显示面板之间。所述第一粘弹性流体层在正常状态下具有柔韧性，可满足动态弯折的要求，当受外界冲击时由于具有剪切增稠的特性，可有效阻挡外界冲击力，保护柔性显示装置。通过在设置有所述铰链结构的所述外壳中填充所述第二粘弹性流体层，可减少由于跌落造成的所述铰链结构的损伤，提高所述柔性显示装置的使用寿命。
 附图说明
图1显示根据本揭示的一实施例的柔性显示装置的展开状态示意图；
图2显示根据本揭示的一实施例的柔性显示装置的折叠状态示意图；
图3显示根据本揭示的一实施例的柔性显示装置受冲击时的变化示意图；
图4显示根据本揭示的一实施例的柔性显示装置的展开状态示意图；
图5显示根据本揭示的一实施例的柔性显示装置的展开状态示意图；
图6显示根据本揭示的一实施例的柔性显示装置的展开状态示意图；
图7显示根据本揭示的一实施例的第二粘弹性流体层设置于外壳中的示意图；以及
图8显示根据本揭示的一实施例的第一粘弹性流体层的结构示意图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图式，用以例示本揭示可用以实施的特定实施例。
为了让本揭示的上述及其他目的、特征、优点能更明显易懂，下文将特举本揭示优选实施例，并配合所附图式，作详细说明如下。再者，本揭示所提到的方向用语，例如上、下、顶、底、前、后、左、右、内、外、侧层、周围、中央、水平、横向、垂直、纵向、轴向、径向、最上层或最下层等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本揭示，而非用以限制本揭示。
在图中，结构相似的单元是以相同标号表示。
参照图1至图3，本揭示的示例性实施例的柔性显示装置10包括外壳100、柔性显示面板200、盖窗300和第一粘弹性流体层400。所述柔性显示面板200设置在所述外壳100上。所述盖窗300设置在所述柔性显示面板200上。所述第一粘弹性流体层400设置在所述盖窗300和所述柔性显示面板200之间。
所述柔性显示装置10例如可为有机发光二极管装置，可应用于手机、电视及平板计算机等电子装置。所述柔性显示装置10展开及折叠状态如图1和图2所示，在用户正常弯折时，所述第一粘弹性流体层400具有柔软性，可辅助所述柔性显示面板200的弯折，当收到外界冲击时，如图3所示，所述柔性显示装置10具有良好的抵抗变形能力。由于所述第一粘弹性流体层400设置在所述盖窗300和所述柔性显示面板200之间。所述第一粘弹性流体层400在正常状态下具有柔韧性，可满足动态弯折的要求(示例于图2)，当受外界冲击时由于具有剪切增稠的特性，可有效阻挡外界冲击力20，保护柔性显示装置(示例于图3)。
所述第一粘弹性流体层400设置在所述盖窗300的下方，但不限于此位置，也可以放置于所述柔性显示装置10的其他膜层之间，用以增强所述柔性显示装置10受冲击、跌落时的可靠性，可以提高所述柔性显示装置的落球高度。
于本揭示其中的一实施例中，所述柔性显示装置10还包括铰链(hinge)结构500和第二粘弹性流体层600，均设置于所述外壳100中。所述铰链结构500设置在所述柔性显示面板200和所述第二粘弹性流体层600之间。所述外壳例如为金属材料以具备轻质、耐弯折特性和良好的抗冲击能力，提高弯折机构的使用寿命。
通过在设置有所述铰链结构500的所述外壳100中填充所述第二粘弹性流体层600，可减少由于跌落造成的所述铰链结构500的损伤，提高所述柔性显示装置10的使用寿命。
具体地，所述第一粘弹性流体层400是第一非牛顿流体层，所述第二粘弹性流体层600是第二非牛顿流体层。所述第一非牛顿流体层和所述第二非牛顿流体层的材料包括聚合物和多个增强粒子。举例而言，聚合物可包括高温聚酰亚胺（polyimide, PI），增强粒子可包括二氧化硅，且增强粒子的直径在微米级别。单个所述增强粒子的粒径小于或等于10μm。
所述第一粘弹性流体层400的厚度小于或等于25μm。所述第一粘弹性流体层的分散体系包括多个增强粒子和有机溶剂，所述增强粒子分布于所述有机溶剂，所述第一粘弹性流体层的基体结构为纤维结构。单个所述增强粒子的粒径小于或等于10μm。所述增强粒子和所述有机溶剂的比例为2:1，可以调控比例来达到不同的使用需求。
参照图4，于本揭示其中的一实施例中，所述柔性显示面板200包括由下而上依序设置的柔性基板210、有机发光层220和封装层230，所述第一粘弹性流体层400设置在所述盖窗300和所述封装层230之间。
参照图5，于本揭示其中的一实施例中，所述柔性显示面板200包括由下而上依序设置的柔性基板210、有机发光层220、封装层230和偏光片240，所述第一粘弹性流体层400设置在所述盖窗300和所述偏光片240之间。于本揭示的实施例中，所述第一粘弹性流体层400设置在所述盖窗300和所述偏光片240之间，然而所述第一粘弹性流体层400不限于设置在所述盖窗300和所述偏光片240之间，也可以放置在其他膜层之间。所述第一粘弹性流体层400可以采用涂布的方式设置在所述柔性显示装置10的膜层之间。
参照图6，于本揭示其中的一实施例中，所述柔性显示面板200包括由下而上依序设置的柔性基板210、有机发光层220、封装层230、偏光片240和触控层250，所述第一粘弹性流体层400设置在所述盖窗300和所述触控层250之间。
图7显示根据本揭示的一实施例的第二粘弹性流体层设置于外壳中的示意图。
参照图7，所述第二粘弹性流体层600设置于所述外壳100中。具体地，所述第二粘弹性流体层600被所述外壳100的底面及多个侧壁所围绕。所述第二粘弹性流体层600与被所述外壳100的所述侧壁位于同一水平。
通过在设置有所述铰链结构500的所述外壳100中填充所述第二粘弹性流体层600，可减少由于跌落造成的所述铰链结构500的损伤，提高所述柔性显示装置10的使用寿命。
图8显示根据本揭示的一实施例的第一粘弹性流体层的结构示意图。
参照图8，所述第一粘弹性流体层400具备剪切增稠特性，所述第一粘弹性流体层400的分散体系包括增强粒子和有机溶剂。这种分散体系的增强粒子用于提高所述第一粘弹性流体层400的硬度，所述有机溶剂用于分散所述增强粒子的流动，使所述增强粒子均匀分布。所述非牛顿流体中的增强粒子可以极细小且均匀分布于有机溶剂中。所述第一粘弹性流体层400的两端可以具有阻挡层。
基体结构为纤维结构，用此分散体系浸泡的纤维，受到剧烈冲击时，抵抗力大。所述增强粒子的类型包括但不限于极细小的SiO2颗粒，溶剂类型包括但不限于聚乙二醇。
所述第一粘弹性流体层400选用材料可要求其折射率和密度与OCA光学胶(optically clear adhesive)相近，以保证不影响所述柔性显示装置10的整体显示效果。
具体地，所述第一粘弹性流体层400包括两种状态(柔软性的状态和较大刚性的状态)，不受冲击时，保持柔软性的状态和受到冲击时，表现强烈的剪切增稠行为而具备较大刚性的状态。
具体地，所述第一粘弹性流体层400在柔软性的状态时，弹性模量和泊松比较低，并在发生大变形以后，可以恢复到初始状态。所述第一粘弹性流体层400包括但不限于多孔聚合物及空心透明电极材料等。
具体地，所述第一粘弹性流体层400和所述第二粘弹性流体层600可以是同种材料也可以是不同材料。所述第一粘弹性流体层400和所述第二粘弹性流体层600都具有剪切增稠特性，所述第二粘弹性流体层600相较于所述第一粘弹性流体层400可以不具备较好的光学特性。因所述第二粘弹性流体层600设置于所述外壳100中，而所述第一粘弹性流体层400设置在所述盖窗300和所述柔性显示面板200之间，因此第二粘弹性流体层600相较于所述第一粘弹性流体层400，比较不会影响所述柔性显示装置10的整体显示效果。
所述柔性显示装置10具有轻薄及易携带等诸多优势，本揭示的实施例提供具有剪切增稠特性的所述第一粘弹性流体层400，其在正常弯折及展开时具有柔韧性，协调所述柔性显示装置10的各膜层的变形，从而消除所述柔性显示装置10弯折过程中剥离(peeling)现象，当受外界冲击时(如落球、跌落等)，具有较强的抵抗外力能力，可提高屏幕落球高度，保护弯折机构的所述铰链结构500免受损伤，提高所述柔性显示装置10的寿命，增强用户体验，达到所述柔性显示装置10的量产指标，预期可为柔性显示产业带来较高的经济效益。
尽管已经相对于一个或多个实现方式示出并描述了本揭示，但是本领域技术人员基于对本说明书和附图的阅读和理解将会想到等价变型和修改。本揭示包括所有这样的修改和变型，并且仅由所附权利要求的范围限制。特别地关于由上述组件执行的各种功能，用于描述这样的组件的术语旨在对应于执行所述组件的指定功能（例如其在功能上是等价的）的任意组件（除非另外指示），即使在结构上与执行本文所示的本说明书的示范性实现方式中的功能的公开结构不等同。此外，尽管本说明书的特定特征已经相对于若干实现方式中的仅一个被公开，但是这种特征可以与如可以对给定或特定应用而言是期望和有利的其他实现方式的一个或多个其他特征组合。而且，就术语“包括”、“具有”、“含有”或其变形被用在具体实施方式或权利要求中而言，这样的术语旨在以与术语“包含”相似的方式包括。
以上仅是本揭示的优选实施方式，应当指出，对于本领域普通技术人员，在不脱离本揭示原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本揭示的保护范围。

Claims (18)

  1. 一种柔性显示装置，包括:
    外壳；
    柔性显示面板，设置在所述外壳上；
    盖窗，设置在所述柔性显示面板上；以及
    第一粘弹性流体层，设置在所述盖窗和所述柔性显示面板之间；
    其中所述第一粘弹性流体层的厚度小于或等于25μm；
    其中所述第一粘弹性流体层的分散体系包括多个增强粒子和有机溶剂，所述增强粒子分布于所述有机溶剂，所述第一粘弹性流体层的基体结构为纤维结构。
  2. 如权利要求1所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层和封装层，所述第一粘弹性流体层设置在所述盖窗和所述封装层之间。
  3. 如权利要求1所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层和偏光片，所述第一粘弹性流体层设置在所述盖窗和所述偏光片之间。
  4. 如权利要求1所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层、偏光片和触控层，所述第一粘弹性流体层设置在所述盖窗和所述触控层之间。
  5. 如权利要求1所述的柔性显示装置，还包括铰链结构和第二粘弹性流体层，均设置于所述外壳中，其中所述铰链结构设置在所述柔性显示面板和所述第二粘弹性流体层之间，所述第一粘弹性流体层是第一非牛顿流体层，所述第二粘弹性流体层是第二非牛顿流体层。
  6. 如权利要求5所述的柔性显示装置，其中所述第一非牛顿流体层和所述第二非牛顿流体层的材料包括聚合物和多个增强粒子。
  7. 如权利要求1所述的柔性显示装置，其中单个所述增强粒子的粒径小于或等于10μm。
  8. 如权利要求1所述的柔性显示装置，其中所述增强粒子和所述有机溶剂的比例为2:1。
  9. 一种柔性显示装置，包括:
    外壳；
    柔性显示面板，设置在所述外壳上；
    盖窗，设置在所述柔性显示面板上；以及
    第一粘弹性流体层，设置在所述盖窗和所述柔性显示面板之间。
  10. 如权利要求9所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层和封装层，所述第一粘弹性流体层设置在所述盖窗和所述封装层之间。
  11. 如权利要求9所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层和偏光片，所述第一粘弹性流体层设置在所述盖窗和所述偏光片之间。
  12. 如权利要求9所述的柔性显示装置，其中所述柔性显示面板包括由下而上依序设置的柔性基板、有机发光层、封装层、偏光片和触控层，所述第一粘弹性流体层设置在所述盖窗和所述触控层之间。
  13. 如权利要求9所述的柔性显示装置，还包括铰链结构和第二粘弹性流体层，均设置于所述外壳中，其中所述铰链结构设置在所述柔性显示面板和所述第二粘弹性流体层之间，所述第一粘弹性流体层是第一非牛顿流体层，所述第二粘弹性流体层是第二非牛顿流体层。
  14. 如权利要求13所述的柔性显示装置，其中所述第一非牛顿流体层和所述第二非牛顿流体层的材料包括聚合物和多个增强粒子。
  15. 如权利要求9所述的柔性显示装置，其中所述第一粘弹性流体层的厚度小于或等于25μm。
  16. 如权利要求9所述的柔性显示装置，其中所述第一粘弹性流体层的分散体系包括多个增强粒子和有机溶剂，所述增强粒子分布于所述有机溶剂，所述第一粘弹性流体层的基体结构为纤维结构。
  17. 如权利要求16所述的柔性显示装置，其中单个所述增强粒子的粒径小于或等于10μm。
  18. 如权利要求16所述的柔性显示装置，其中所述增强粒子和所述有机溶剂的比例为2:1。
PCT/CN2019/073235 2018-12-19 2019-01-25 柔性显示装置 Ceased WO2020124741A1 (zh)

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