WO2021036089A1 - 盖板及柔性显示装置 - Google Patents

盖板及柔性显示装置 Download PDF

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Publication number
WO2021036089A1
WO2021036089A1 PCT/CN2019/123946 CN2019123946W WO2021036089A1 WO 2021036089 A1 WO2021036089 A1 WO 2021036089A1 CN 2019123946 W CN2019123946 W CN 2019123946W WO 2021036089 A1 WO2021036089 A1 WO 2021036089A1
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WO
WIPO (PCT)
Prior art keywords
light
flexible display
responsive polymer
cover plate
display device
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Application number
PCT/CN2019/123946
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English (en)
French (fr)
Inventor
许峰
Original Assignee
武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/641,342 priority Critical patent/US20210056870A1/en
Publication of WO2021036089A1 publication Critical patent/WO2021036089A1/zh

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Classifications

    • 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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/03—Covers

Definitions

  • This application relates to the field of display technology, in particular to a cover plate and a flexible display device.
  • the flexible display device needs to have good bending performance to ensure that the flexible display device is flexible when it is bent. At the same time, the flexible display device needs to have a certain degree of mechanical strength so as not to be damaged during repeated use.
  • the part of the protective cover corresponding to the bending area of the flexible display device needs to have good flexibility when the flexible display device is bent, and sufficient machinery is required when the flexible display device is unfolded strength.
  • the purpose of the present application is to provide a cover plate and a flexible display device, the part of the cover plate corresponding to the bending area of the flexible display device has good flexibility when the flexible display device is folded, and has good mechanical properties when the flexible display device is flattened.
  • a cover plate the cover plate has at least one first bending area, the first bending area of the cover plate is provided with a photo-responsive polymer layer, and the preparation material of the photo-responsive polymer layer includes light
  • the light-responsive polymer is a rigid polymer under the first light condition, and the light-responsive polymer is a flexible polymer under the second light condition.
  • cover plate there are a plurality of the first bending regions, and a first non-bending region is respectively provided on opposite sides of each of the first bending regions.
  • the photo-responsive polymer layer extends from the first bending area to the first non-bending area.
  • the cover plate further includes a hard layer disposed on the surface of the photo-responsive polymer layer in the first non-bending area.
  • the first illumination condition is ambient light illumination and/or ultraviolet light illumination
  • the second illumination condition is any one of red light illumination, blue light illumination, green light illumination, and no illumination, so The light intensity of the red light, the light intensity of the blue light, and the green light are stronger than the light intensity of the light of the same color in the ambient light.
  • the photo-responsive polymer is selected from azo polymers or azo derivative polymers.
  • the photo-responsive polymer is an aromatic azo polymer.
  • the transition relaxation time of the photo-responsive polymer is less than 1 s.
  • the transition relaxation time of the photo-responsive polymer is less than 0.5 s.
  • a flexible display device the flexible display device includes a cover plate and a flexible display panel, the cover plate is arranged on the light emitting side of the flexible display panel,
  • the cover plate has at least one first bending area, the first bending area of the cover plate is provided with a photo-responsive polymer layer, and the preparation material of the photo-responsive polymer layer includes a photo-responsive polymer, so
  • the light-responsive polymer is a rigid polymer under the first illumination condition, and the light-responsive polymer is a flexible polymer under the second illumination condition,
  • the flexible display panel has at least one second bending area, and the second bending area corresponds to the first bending area one-to-one.
  • the flexible display device there are a plurality of the first bending regions, and a first non-bending region is respectively provided on opposite sides of each of the first bending regions.
  • the photo-responsive polymer layer extends from the first bending area to the first non-bending area.
  • the cover plate further includes a hard layer disposed on the surface of the photo-responsive polymer layer in the first non-bending area.
  • the first illumination condition is ambient light illumination and/or ultraviolet light illumination
  • the second illumination condition is any one of red light illumination, blue light illumination, green light illumination and no illumination
  • the light intensity of the red light, the light intensity of the blue light, and the green light are stronger than the light intensity of the light of the same color in the ambient light.
  • the red light irradiation, the blue light irradiation, and the green light irradiation are provided by the flexible display panel.
  • the photo-responsive polymer is selected from azo polymers or azo derivative polymers.
  • the light-responsive polymer is an aromatic azo polymer.
  • the transition relaxation time of the light-responsive polymer is less than 1 s.
  • the flexible display device further includes a touch layer disposed between the cover plate and the flexible display panel.
  • the present application provides a cover plate and a flexible display device.
  • the cover plate has at least one first bending area.
  • the first bending area of the cover plate is provided with a photo-responsive polymer layer.
  • the preparation material of the photo-responsive polymer layer includes the photo-responsive polymer layer.
  • Polymer, the light-responsive polymer is a rigid polymer under the first light condition, and the light-responsive polymer is a flexible polymer under the second light condition, so that the part of the cover plate corresponding to the bending area of the flexible display device is in the flexible display device. It has good flexibility in the bent state, and has good mechanical properties when the flexible display device is in the flat state, so as to play a protective role.
  • FIG. 1 is a schematic structural diagram of a flexible display device according to the first embodiment of the application
  • FIG. 2 is a schematic structural diagram of a cover plate of the flexible display device shown in FIG. 1;
  • Fig. 3 is a schematic diagram of the transition of the light-responsive polymer under the first illumination condition and the second illumination condition;
  • FIG. 4 is a schematic structural diagram of a flexible display device according to a second embodiment of the application.
  • FIG. 1 is a schematic structural diagram of a flexible display device according to a first embodiment of the application
  • FIG. 2 is a schematic structural diagram of a cover plate in the flexible display device shown in FIG.
  • the flexible display device is an inwardly bent flexible display device.
  • the flexible display device includes a flexible display panel 101, a cover plate 102, a touch layer 103, a polarizing layer 104, and a back cover plate 105.
  • the flexible display panel 101 is used to display images.
  • the flexible display panel 101 is a flexible organic light emitting diode display panel.
  • the flexible display panel 101 may be a top emission type organic light emitting diode display panel, or a bottom emission type organic light emitting diode display panel.
  • the flexible display panel 101 has good flexibility, so that it can be switched between a bent state or a flexible state.
  • the flexible display panel 101 has at least one second bending area 101a, so that the flexible display panel 101 can be switched between a bent state and an expanded state, so as to meet the foldability requirements of the flexible display device for the flexible display panel 101.
  • the flexible display panel 101 also has a plurality of second non-bending areas 101b, and each second bending area 101a has a second non-bending area 101b on opposite sides.
  • At least one second bending area 101a and a plurality of second non-bending areas 101b of the flexible display panel 101 both display images.
  • the flexible display panel 101 has a second bending area 101a, and two opposite sides of the second bending area 101a respectively have a second non-bending area 101b.
  • the two second non-bending areas 101b are symmetrically arranged on both sides of the second bending area 101a.
  • the flexible display panel 101 includes a flexible substrate and an organic light emitting diode array layer disposed on the flexible substrate.
  • the organic light emitting diode array layer includes a plurality of organic light emitting diodes arranged in an array.
  • Organic light emitting diodes include red organic light emitting diodes, blue organic light emitting diodes, and green organic light emitting diodes.
  • Each organic light emitting diode includes a cathode, an anode, and an organic light emitting layer arranged between the cathode and the anode.
  • the flexible display panel 101 may further include a thin film transistor array layer, the thin film transistor array layer includes a plurality of thin film transistors arranged in an array, and the thin film transistors are used to control the organic light emitting diode to emit light.
  • the cover plate 102 is used to protect the flexible display panel 101.
  • the cover plate 102 is disposed on the light emitting side of the flexible display panel 101.
  • the thickness of the cover plate 102 ranges from 40 nanometers to 200 nanometers.
  • the thickness of the cover plate 102 is 50 nanometers, 80 nanometers, 120 nanometers, and so on.
  • the cover plate 102 has at least one first bending area 102a, so that the cover plate 102 can be switched between the folded state and the unfolded state, so as to meet the requirement of the flexible display device for the cover plate 102 to have foldability.
  • the first bending area 102a and the second bending area 101a correspond one-to-one.
  • the flexible display panel 101 also has a first non-bending area 102b.
  • a first non-bending area 102b is provided on opposite sides of each first bending area 102a. As shown in FIG. 1, the cover plate 102 has a first bending area 102a, and opposite sides of the first bending area 102a respectively have a first non-bending area 102b.
  • the first bending area 102 a of the cover plate 102 is provided with a photo-responsive polymer layer 1021.
  • the preparation material of the photo-responsive polymer layer 1021 includes a photo-responsive polymer, the photo-responsive polymer is a rigid polymer under the first illumination condition, and the photo-responsive polymer is a flexible polymer under the second illumination condition.
  • the photo-responsive polymer is a rigid polymer under the first illumination condition, so that the photo-responsive polymer layer 1021 has good mechanical properties under the first illumination condition, such as hardness and strength, and can prevent the cover plate 102 from being scratched or broken. The role of.
  • the light-responsive polymer is a flexible polymer under the second light condition, so that the light-responsive polymer layer 1021 has good flexibility under the second light condition, such as excellent tensile performance or excellent bending resistance, and can be adapted to flexible display devices The bending requirements.
  • the light-responsive polymer layer 1021 of the first bending area 102a When the flexible display device is in the bent state, the light-responsive polymer layer 1021 of the first bending area 102a has good flexibility under the second light conditions, so that the cover plate 102 of the first bending area 102a can be better bent.
  • the photo-responsive polymer layer 1021 of the first bending area 102a When the flexible display device is in a flattened state, the photo-responsive polymer layer 1021 of the first bending area 102a has good mechanical properties under the first light conditions, so that the cover 102 of the first bending area 102a can avoid scratching Damage or breakage, play a protective role.
  • the light-responsive polymer layer 1021 extends from the first bending area 102a to the first non-bending area 102b, so that the entire cover plate 102 has good mechanical properties under the first illumination condition, and under the second illumination It has good flexibility under the conditions, which further makes the cover plate 102 suitable for flexible display devices.
  • the cover plate 102 further includes a hard layer 1022, which is disposed on the photo-responsive polymer layer 1021 of the first non-bending area 102b, so as to improve the surface of the cover plate 102 in the first non-bending area 102b.
  • the hardness further prevents the cover plate 102 from being damaged or damaged under the action of external force.
  • the hard layer 1022 is disposed on the surface of the photo-responsive polymer layer 1021 away from the flexible display panel 101.
  • the preparation material of the hard layer 1022 may be at least one of silicon oxide, silicon nitride, aluminum oxide, calcium fluoride, magnesium fluoride, aluminum fluoride, and barium fluoride.
  • the refractive index of the hard layer 1022 is greater than that of air, and the refractive index of the light-responsive polymer layer 1021 under the first illumination condition is greater than that of the hard layer 1022, so that the light emitted by the organic light-emitting diode passes through A medium layer with decreasing refractive index to improve the light output efficiency of the flexible display device.
  • the preparation material of the hard layer 1022 is at least one of aluminum fluoride, magnesium fluoride, calcium fluoride, and barium fluoride.
  • the cover plate 102 further includes an anti-reflection layer 1023.
  • the anti-reflection layer 1023 is disposed on the surface of the light-responsive polymer layer 1021 in the first bending area 102a away from the flexible display panel 101.
  • the refractive index of the anti-reflection layer 1023 is greater than that of air.
  • the refractive index of the light-responsive polymer layer 1021 under the first illumination condition is greater than the refractive index of the antireflection layer 1023.
  • the antireflection layer 1023 is a transparent organic layer.
  • the first lighting condition is any one of ambient light irradiation and/or ultraviolet light irradiation.
  • the ultraviolet light can also be derived from ambient light or provided by the flexible display panel 101.
  • Ambient light is composed of colored lights of different wavelengths, and the proportions of colored lights of different wavelengths are different, resulting in lower intensity of red, blue, green and other colored lights in the ambient light.
  • the intensity of red light in ambient light is higher than that of pure red.
  • the light intensity is low.
  • the wavelength of the ultraviolet light can range from 10 nanometers to 390 nanometers, and the wavelength of the ultraviolet light can range from 100 nanometers to 380 nanometers, for example, the wavelength of ultraviolet light is 360 nanometers.
  • the light-responsive polymer When the flexible display device is in a flat state, the light-responsive polymer becomes rigid under ambient light irradiation, so that the cover 102 of the first bending area 102a has good mechanical properties, or the flexible display device is under certain light conditions. It becomes rigid when exposed to strong ultraviolet light.
  • the second illumination condition is any one of red light, blue light, green light, and no light.
  • the intensity of red light, blue light, and green light are stronger than the light intensity of the same color in the ambient light.
  • Red light irradiation, blue light irradiation, and green light irradiation may be provided by the flexible display panel 101.
  • the blue organic light-emitting diode in the flexible display panel emits blue light, while neither the red organic light-emitting diode nor the green organic light-emitting diode emits light to display a pure blue image.
  • the cover plate 102 of the bending area 102a has good flexibility; or, when the flexible display device is in an inner bending state, the light-responsive polymer layer 1021 is in a non-lighting condition, and the cover plate of the first bending area 102a has good flexibility.
  • the light-responsive polymer layer 1021 of the first bending area 102a has good mechanical properties under ambient light or ultraviolet light irradiation, and the light emitted by the flexible display panel 101 is stronger than the environment.
  • the photo-responsive polymer layer 1021 receives the light from the flexible One of the blue light intensity, red light intensity, and green light intensity of the display panel 101 is greater than the light intensity of the same color light in the ambient light, and the photo-responsive polymer changes in response to one of blue light, red light, and green light.
  • the cover plate 102 it is beneficial for the cover plate 102 to adapt to the stretching during the bending process of the flexible display device. After the flexible display device is bent, the photo-responsive polymer layer 1021 still maintains good flexibility in the absence of light.
  • the photo-responsive polymer is selected from photo-responsive isomeric polymers, that is, the photo-responsive polymer undergoes configuration isomerism under the action of light.
  • the light-responsive polymer is selected from azo polymers or azo derivative polymers.
  • Azo polymers include aromatic azo polymers, such as azobenzene polymers and the like. Due to the aromatic structure of the aromatic azo polymer, the light-responsive polymer has better rigidity under light conditions, and can further improve the rigidity of the light-responsive polymer under light conditions.
  • Azo derivative polymers include polyether aromatic azo polymers and the like.
  • FIG. 3 is a schematic diagram of the transition of the photo-responsive polymer under the first light condition and the second light condition.
  • the light-responsive polymer (I) becomes a light-responsive polymer (II) under the first light condition
  • the light-responsive polymer (II) becomes a light-responsive polymer (I) under the second light condition, where R 1 Both and R 2 are substituents, and the substituents may be alkyl, phenyl, amine or other substituents.
  • the selection of the substituents depends on the light-responsive transition conditions of the light-responsive polymer on the one hand, and on the requirements for the flexibility and rigidity of the light-responsive polymer on the other hand.
  • the light-responsive polymer (I) is a trans-isomeric azo polymer, which has a small steric hindrance, so the light-responsive polymer (I) has good flexibility, which makes the light-responsive polymer under the second light condition
  • the layer 1021 has good flexibility.
  • the light-responsive polymer (II) is a cis-isomeric azo polymer with large steric hindrance, so the light-responsive polymer (II) is a rigid polymer, which makes the light-responsive polymer under the first light condition
  • the layer 1021 has good mechanical properties.
  • the transition relaxation time of the photo-responsive polymer is less than 1s, so that the photo-responsive polymer can complete the conversion from rigid polymer to flexible polymer or flexible polymer to rigid polymer in a short time, so as to adapt to flexible display devices.
  • the flexibility and rigidity of the cover plate 102 are required when changing between the folded state and the unfolded state.
  • the transition relaxation time of the photo-responsive polymer is less than 0.5s, so that the photo-responsive polymer can complete the conversion from rigid polymer to flexible polymer or flexible polymer to rigid polymer in a shorter time, so as to further Shorten the time required for the mechanical performance of the flexible display device to change when the inner bending state changes between the closed state and the unfolded state. Since the light energy required for the rigidity and flexibility of the photo-responsive polymer is small, the light energy of the milliwatt level drives the photo-responsive polymer to undergo a rigid transition.
  • the light-responsive polymer is a transparent material, so that the cover plate 102 prepared therefrom also has good light transmittance.
  • the touch layer 103 receives a touch signal to control the flexible display panel 101 to display image information.
  • the touch layer 103 is disposed between the cover plate 102 and the flexible display panel 101. Specifically, the touch layer 103 is attached to the light-emitting surface of the flexible display panel 101 through the optically transparent adhesive layer 106.
  • the touch layer 103 may include a capacitive touch component, the touch layer 103 may include a resistive touch component, and the touch layer 103 may also include an optical touch component and the like.
  • the polarizer 104 plays a role of deflecting light, so that light vibrating in a specific direction can pass, but light in other vibrating directions cannot pass.
  • the polarizer 104 is disposed between the touch layer 103 and the cover plate 102. Specifically, the polarizer 104 is attached to the side of the touch layer 103 away from the flexible display panel 101 through the optically transparent adhesive layer 106.
  • the polarizer 104 may be circularly polarized light to reduce the reflection of ambient light and improve the display effect of the flexible display device.
  • the rear cover 105 plays a role of protecting the flexible display panel 101.
  • the back cover 105 is attached to the side of the flexible display panel 101 away from the touch layer 103 through the optically transparent adhesive layer 106.
  • the cover plate of the flexible display device of the embodiment of the present application has at least one first bending area, and the first bending area of the cover plate is provided with a photo-responsive polymer layer.
  • the preparation material of the photo-responsive polymer layer includes a photo-responsive polymer,
  • the responsive polymer is a rigid polymer under the first light condition, and the light-responsive polymer is a flexible polymer under the second light condition, so that the part of the cover plate corresponding to the bending area of the flexible display device is in the bending state of the flexible display device It has good flexibility, and has good mechanical properties when the flexible display device is in a flat state, so as to play a protective role.
  • FIG. 4 is a schematic structural diagram of a flexible display device according to a second embodiment of the application.
  • the flexible display device shown in FIG. 4 is basically similar to the flexible display device shown in FIG. 1, except that the flexible display device has a plurality of bending regions 1, and correspondingly, the cover plate 102 has a plurality of first bending regions 102a, The flexible display panel 101 has a plurality of second bending regions 101b, so that the flexible display device has better flexibility.

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  • General Physics & Mathematics (AREA)
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Abstract

一种盖板(102)及柔性显示装置，盖板（102）具有至少一第一弯折区（102a），盖板（102）的第一弯折区（102a）设置有光响应聚合物层（1021），光响应聚合物层（1021）的制备材料包括光响应聚合物，光响应聚合物在第一光照条件下为刚性聚合物，光响应聚合物在第二光照条件下为柔性聚合物。

Description

盖板及柔性显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种盖板及柔性显示装置。
 背景技术
柔性显示设备需要具有良好的弯折性能以保证柔性显示设备在弯折时具有柔性。同时，柔性显示设备需要具备一定的机械强度，才不至于在反复使用过程中发生损坏。目前，使用保护盖板作为柔性显示设备的保护层时，保护盖板对应柔性显示设备弯折区域的部分在柔性显示装置弯折时需要具有良好的柔性，在柔性显示装置展开时需要足够的机械强度。
因此，有必要提出一种技术方案以解决传统保护盖板应用于柔性显示设备时，保护盖板对应柔性显示设备弯折区域的部分机械性能与弯折性能很难兼顾的问题。
 技术问题
本申请的目的在于提供一种盖板及柔性显示装置，该盖板对应柔性显示装置弯折区域的部分在柔性显示装置折叠时具有良好的柔性，在柔性显示装置展平时具有良好的机械性能。
 技术解决方案
一种盖板，所述盖板具有至少一第一弯折区，所述盖板的所述第一弯折区设置有光响应聚合物层，所述光响应聚合物层的制备材料包括光响应聚合物，所述光响应聚合物在第一光照条件下为刚性聚合物，所述光响应聚合物在第二光照条件下为柔性聚合物。
在上述盖板中，所述第一弯折区为多个，每个所述第一弯折区的相对两侧分别设置有一第一非弯折区。
在上述盖板中，所述光响应聚合物层从所述第一弯折区延伸至所述第一非弯折区。
在上述盖板中，所述盖板还包括硬质层，所述硬质层设置于所述第一非弯折区的所述光响应聚合物层表面。
在上述盖板中，所述第一光照条件为环境光照射和/或紫外光照射，所述第二光照条件为红光光照、蓝光照射、绿光光照和无光照中的任意一种，所述红光的光强、所述蓝光的光强以及所述绿光的光强大于所述环境光中相同色光的光强。
在上述盖板中，所述光响应聚合物选自偶氮聚合物或偶氮衍生物聚合物。
在上述盖板中，所述光响应聚合物为芳香偶氮聚合物。
在上述盖板中，所述光响应聚合物的转变弛豫时间小于1s。
在上述盖板中，所述光响应聚合物的转变豫弛时间小于0.5s。
一种柔性显示装置，所述柔性显示装置包括盖板和柔性显示面板，所述盖板设置于所述柔性显示面板的出光侧，
所述盖板具有至少一第一弯折区，所述盖板的所述第一弯折区设置有光响应聚合物层，所述光响应聚合物层的制备材料包括光响应聚合物，所述光响应聚合物在第一光照条件下为刚性聚合物，所述光响应聚合物在第二光照条件下为柔性聚合物，
所述柔性显示面板具有至少一第二弯折区，所述第二弯折区与所述第一弯折区一一对应。
在上述柔性显示装置中，所述第一弯折区为多个，每个所述第一弯折区的相对两侧分别设置有一第一非弯折区。
在上述柔性显示装置中，所述光响应聚合物层从所述第一弯折区延伸至所述第一非弯折区。
在上述柔性显示装置中，所述盖板还包括硬质层，所述硬质层设置于所述第一非弯折区的所述光响应聚合物层表面。
在上述柔性显示装置中，所述第一光照条件为环境光照射和/或紫外光照射，所述第二光照条件为红光照射、蓝光照射、绿光光照和无光照中的任意一种，所述红光的光强、所述蓝光的光强以及所述绿光的光强大于所述环境光中相同色光的光强。
在上述柔性显示装置中，所述红光照射、所述蓝光照射以及所述绿光照射由所述柔性显示面板提供。
在上述柔性显示装置中，所述光响应聚合物选自偶氮聚合物或偶氮衍生物聚合物。
在上述柔性显示装置中，所述光响应聚合物为芳香偶氮聚合物。
在上述柔性显示装置中，所述光响应聚合物的转变弛豫时间小于1s。
在上述柔性显示装置中，所述柔性显示装置还包括触控层，所述触控层设置于所述盖板和所述柔性显示面板之间。
 有益效果
本申请提供一种盖板及柔性显示装置，盖板具有至少一第一弯折区，盖板的第一弯折区设置有光响应聚合物层，光响应聚合物层的制备材料包括光响应聚合物，光响应聚合物在第一光照条件下为刚性聚合物，光响应聚合物在第二光照条件下为柔性聚合物，使得盖板对应柔性显示装置弯折区域的部分在柔性显示装置处于弯折状态时具有良好的柔性，在柔性显示装置处于展平状态时具有良好的机械性能，以起到保护的作用。
 附图说明
图1为本申请第一实施例柔性显示装置的结构示意图；
图2为图1所示柔性显示装置的盖板的结构示意图；
图3为光响应聚合物在第一光照条件下和第二光照条件下的转变示意图；
图4为本申请第二实施例柔性显示装置的结构示意图。
 本发明的实施方式
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。
请参阅图1和图2，图1为本申请第一实施例柔性显示装置的结构示意图，图2为图1所示柔性显示装置中盖板的结构示意图。柔性显示装置为内弯折柔性显示装置。柔性显示装置包括柔性显示面板101、盖板102、触控层103、偏光层104以及后盖板105。
柔性显示面板101用于显示图像。柔性显示面板101为柔性有机发光二极管显示面板。柔性显示面板101可以为顶发光型有机发光二极管显示面板，也可以为底发光型有机发光二极管显示面板。柔性显示面板101具有良好的柔性，使得其可以在弯折态或柔性态之间转换。
柔性显示面板101具有至少一第二弯折区101a，以使柔性显示面板101在弯折态和展开态之间切换，以适应柔性显示装置对柔性显示面板101可折叠性的要求。柔性显示面板101还具有多个第二非弯折区101b，每个第二弯折区101a相对的两侧分别有一个第二非弯折区101b。柔性显示面板101的至少一第二弯折区101a和多个第二非弯折区101b均显示图像。具体地，如图1所示，柔性显示面板101具有一个第二弯折区101a，第二弯折区101a的相对两侧分别具有一个第二非弯折区101b。两个第二非弯折区101b对称设置于第二弯折区101a的两侧。
柔性显示面板101包括一柔性基材和设置于柔性基材上的有机发光二极管阵列层。有机发光二极管阵列层包括多个阵列排布的有机发光二极管。有机发光二极管包括红色有机发光二极管、蓝色有机发光二极管以及绿色有机发光二极管。每个有机发光二极管包括一阴极、一阳极以及设置于阴极和阳极之间的有机发光层。柔性显示面板101还可以包括薄膜晶体管阵列层，薄膜晶体管阵列层包括多个阵列排布的薄膜晶体管，薄膜晶体管用于控制有机发光二极管发光。
盖板102用于保护柔性显示面板101。盖板102设置于柔性显示面板101的出光侧。盖板102的厚度的取值范围为40纳米-200纳米，例如，盖板102的厚度为50纳米、80纳米、120纳米等。盖板102具有至少一第一弯折区102a，以使盖板102在折叠态和展开态之间切换，以适应柔性显示装置对盖板102具有可折叠性的要求。第一弯折区102a和第二弯折区101a一一对应。柔性显示面板101还具有第一非弯折区102b。每个第一弯折区102a的相对两侧分别设置有一第一非弯折区102b。如图1所示，盖板102具有一个第一弯折区102a，该第一弯折区102a的相对两侧分别具有一个第一非弯折区102b。
盖板102的第一弯折区102a设置有光响应聚合物层1021。光响应聚合物层1021的制备材料包括光响应聚合物，光响应聚合物在第一光照条件下为刚性聚合物，光响应聚合物在第二光照条件下为柔性聚合物。光响应聚合物在第一光照条件下为刚性聚合物，使得光响应聚合物层1021在第一光照条件下具有良好的机械性能，例如硬度以及强度，能起到防止盖板102划伤或者破裂的作用。光响应聚合物在第二光照条件下为柔性聚合物，使得光响应聚合物层1021在第二光照条件下具有良好的柔性，例如抗拉性能优良或耐弯折性能优良，能适应柔性显示装置的弯折要求。
柔性显示装置处于弯折态时，第一弯折区102a的光响应聚合物层1021的在第二光照条件下具有良好的柔性，使得第一弯折区102a的盖板102能更好的弯折；柔性显示装置处于展平态时，第一弯折区102a的光响应聚合物层1021在第一光照条件下具有良好的机械性能，使得第一弯折区102a的盖板102能避免划伤或者破损，起到保护作用。
在本实施例中，光响应聚合物层1021从第一弯折区102a延伸至第一非弯折区102b，使得整个盖板102在第一光照条件下具有良好的机械性能，在第二光照条件下具有良好的柔性，进一步使盖板102适用于柔性显示装置。
进一步地，盖板102还包括硬质层1022，硬质层1022设置于第一非弯折区102b的光响应聚合物层1021上，以提高第一非弯折区102b的盖板102表面的硬度，进一步地避免盖板102受到损伤或在外力作用下破损。具体地，硬质层1022设置于光响应聚合物层1021远离柔性显示面板101的表面。硬质层1022的制备材料可以为氧化硅、氮化硅、三氧化二铝、氟化钙、氟化镁、氟化铝以及氟化钡中的至少一种。
更进一步地，硬质层1022的折射率大于空气的折射率，光响应聚合物层1021在第一光照条件下的折射率大于硬质层1022的折射率，以使得有机发光二极管发出的光经过折射率递减的介质层，以提高柔性显示装置的出光效率。例如硬质层1022的制备材料为氟化铝、氟化镁、氟化钙以及氟化钡中的至少一种。
进一步地，盖板102还包括增透层1023，增透层1023设置于第一弯折区102a的光响应聚合物层1021远离柔性显示面板101的表面上，增透层1023的折射率大于空气的折射率，光响应聚合物层1021在第一光照条件下的的折射率大于增透层1023的折射率。增透层1023为透明有机层。
在本实施例中，第一光照条件为环境光照射和/或紫外光照射中的任意一种。紫外光也可以来源于环境光或者由柔性显示面板101提供。环境光是由不同波长的色光组成，不同波长的色光的比例不同，导致环境光中的红光、蓝光、绿光以及其他色光光强较低，例如环境光中的红光光强比纯红光的光强低。紫外光的波长的取值范围可以10纳米-390纳米，紫外光的波长的取值范围可以100纳米-380纳米，例如紫外光的波长为360纳米。柔性显示装置为处于展平态时，光响应聚合物在环境光照射的情况下变为刚性，使得第一弯折区102a的盖板102具有良好的机械性能，或者，柔性显示装置在一定光强的紫外光照射的情况下变为刚性。
在本实施例中，第二光照条件为红光照射、蓝光照射、绿光照射和无光照中的任意一种。红光的光强、蓝光的光强以及绿光的光强大于环境光中相同色光的光强。红光照射、蓝光照射、绿光照射可以由柔性显示面板101提供。例如，柔性显示装置为内弯折柔性显示装置时，柔性显示面板中蓝色有机发光二极管发出蓝光，而红色有机发光二极管和绿色有机发光二极管均不发光，以显示纯蓝色画面，使第一弯折区102a的盖板102具有良好的柔性；或者，柔性显示装置处于内弯折状态时，光响应聚合物层1021处于无光照条件，第一弯折区102a的盖板具有良好的柔性。
柔性显示装置处于展平态时，第一弯折区102a的光响应聚合物层1021在环境光照射或者紫外光照射的条件下具有良好的机械性，通过使柔性显示面板101发出光强大于环境光中蓝光光强的蓝光、光强大于环境光中红光光强的红光以及光强大于环境光中绿光光强的绿光中的一种，使得光响应聚合物层1021接收来自柔性显示面板101的蓝光光强、红光光强以及绿光光强中的一种大于环境光中相同色光的光强，光响应聚合物响应于蓝光、红光以及绿光中的一种而变为柔性，有利于盖板102适应柔性显示装置弯折过程中的拉伸，柔性显示装置弯折后，光响应聚合物层1021在无光照条件下仍保持良好的柔性。
在本实施例中，光响应聚合物选自光响应异构聚合物，即光响应聚合物在光的作用下会发生构型异构。光响应聚合物选自偶氮聚合物或偶氮衍生物聚合物。偶氮聚合物包括芳香偶氮聚合物，例如偶氮苯聚合物等。芳香偶氮聚合物由于具有芳香结构，使得光响应聚合物在光照条件下具有更好的刚性，能进一步地提高光响应聚合物在光照条件下的刚性。偶氮衍生物聚合物包括聚醚型芳香偶氮聚合物等。
请参阅图3，其为光响应聚合物在第一光照条件下和第二光照条件下的转变示意图。光响应聚合物（Ⅰ）在第一光照条件下变为光响应聚合物（Ⅱ），光响应聚合物（Ⅱ）在第二光照条件下变为光响应聚合物（Ⅰ），其中，R 1和R 2均为取代基，取代基可以为烷基、苯基、胺基或者其他取代基。取代基的选择一方面取决于光响应聚合物的光响应转变条件，另一方面取决于对光响应聚合物柔性以及刚性的要求。光响应聚合物（Ⅰ）为反式异构偶氮聚合物，具有较小的空间位阻，故光响应聚合物（Ⅰ）具有良好的柔性，使得在第二光照条件下的光响应聚合物层1021具有良好的柔性。光响应聚合物（Ⅱ）为顺式异构偶氮聚合物，具有较大的空间位阻，故光响应聚合物（Ⅱ）为刚性聚合物，使得在第一光照条件下的光响应聚合物层1021具有良好的机械性能。
光响应聚合物的转变豫弛时间小于1s，以使得光响应聚合物在较短的时间内完成刚性聚合物至柔性聚合物或柔性聚合物至刚性聚合物的转化，以适应柔性显示装置在内弯折关闭状态和展开状态之间变化时对盖板102的柔性和刚性的要求。进一步地，光响应聚合物的转变豫弛时间小于0.5s，以使得光响应聚合物在更短的时间内完成刚性聚合物至柔性聚合物或柔性聚合物至刚性聚合物的转化，以进一步地缩短柔性显示装置在内弯折关闭和展开状态之间变化时机械性能变化所需的时间。由于光响应聚合物发生刚性和柔性变化所需的光能量较小，毫瓦级的光能量即驱动光响应聚合物发生刚性的转变。
需要说明的是，光响应聚合物为透明材料，使得其制备的盖板102也具有良好的透光性。
触控层103接收触控信号以控制柔性显示面板101显示图像信息。触控层103设置于盖板102和柔性显示面板101之间。具体地，触控层103通过光学透明胶层106贴附至柔性显示面板101的出光表面上。触控层103可以包括电容式触控组件，触控层103可以包括电阻式触控组件，触控层103还可以包括光学触控组件等。
偏光片104起到对光进行偏转的作用，使得特定方向振动的光通过，而其他振动方向的光线不能通过。偏光片104设置于触控层103和盖板102之间。具体地，偏光片104通过光学透明胶层106贴附至触控层103远离柔性显示面板101的一侧。偏光片104可以为圆偏光，以起到减少环境光的反射的作用，提高柔性显示装置的显示效果。
后盖板105起到保护柔性显示面板101的作用。后盖板105通过光学透明胶层106贴附至柔性显示面板101远离触控层103的一侧。
本申请实施例柔性显示装置的盖板具有至少一第一弯折区，盖板的第一弯折区设置有光响应聚合物层，光响应聚合物层的制备材料包括光响应聚合物，光响应聚合物在第一光照条件下为刚性聚合物，光响应聚合物在第二光照条件下为柔性聚合物，使得盖板对应柔性显示装置弯折区域的部分在柔性显示装置处于弯折状态时具有良好的柔性，在柔性显示装置处于展平状态时具有良好的机械性能，以起到保护的作用。
请参阅图4，其为本申请第二实施例柔性显示装置的结构示意图。图4所示柔性显示装置与图1所示柔性显示装置基本相似，不同之处在于，柔性显示装置具有多个弯折区1，对应的，盖板102具有多个第一弯折区102a，柔性显示面板101具有多个第二弯折区101b，以使柔性显示装置具有更好的柔性。
以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；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的技术方案的范围。

Claims (19)

  1. 一种盖板，其中，所述盖板具有至少一第一弯折区，所述盖板的所述第一弯折区设置有光响应聚合物层，所述光响应聚合物层的制备材料包括光响应聚合物，所述光响应聚合物在第一光照条件下为刚性聚合物，所述光响应聚合物在第二光照条件下为柔性聚合物。
  2. 根据权利要求1所述的盖板，其中，所述第一弯折区为多个，每个所述第一弯折区的相对两侧分别设置有一第一非弯折区。
  3. 根据权利要求2所述的盖板，其中，所述光响应聚合物层从所述第一弯折区延伸至所述第一非弯折区。
  4. 根据权利要求3所述的盖板，其中，所述盖板还包括硬质层，所述硬质层设置于所述第一非弯折区的所述光响应聚合物层表面。
  5. 根据权利要求1所述的盖板，其中，所述第一光照条件为环境光照射和/或紫外光照射，所述第二光照条件为红光照射、蓝光照射、绿光光照和无光照中的任意一种，所述红光的光强、所述蓝光的光强以及所述绿光的光强大于所述环境光中相同色光的光强。
  6. 根据权利要求1所述的盖板，其中，所述光响应聚合物选自偶氮聚合物或偶氮衍生物聚合物。
  7. 根据权利要求6所述的盖板，其中，所述光响应聚合物为芳香偶氮聚合物。
  8. 根据权利要求1所述的盖板，其中，所述光响应聚合物的转变弛豫时间小于1s。
  9. 根据权利要求8所述的盖板，其中，所述光响应聚合物的转变豫弛时间小于0.5s。
  10. 一种柔性显示装置，其中，所述柔性显示装置包括盖板和柔性显示面板，所述盖板设置于所述柔性显示面板的出光侧，
    所述盖板具有至少一第一弯折区，所述盖板的所述第一弯折区设置有光响应聚合物层，所述光响应聚合物层的制备材料包括光响应聚合物，所述光响应聚合物在第一光照条件下为刚性聚合物，所述光响应聚合物在第二光照条件下为柔性聚合物，
    所述柔性显示面板具有至少一第二弯折区，所述第二弯折区与所述第一弯折区一一对应。
  11. 根据权利要求10所述的柔性显示装置，其中，所述第一弯折区为多个，每个所述第一弯折区的相对两侧分别设置有一第一非弯折区。
  12. 根据权利要求11所述的柔性显示装置，其中，所述光响应聚合物层从所述第一弯折区延伸至所述第一非弯折区。
  13. 根据权利要求12所述的柔性显示装置，其中，所述盖板还包括硬质层，所述硬质层设置于所述第一非弯折区的所述光响应聚合物层表面。
  14. 根据权利要求10所述的柔性显示装置，其中，所述第一光照条件为环境光照射和/或紫外光照射，所述第二光照条件为红光照射、蓝光照射、绿光光照和无光照中的任意一种，所述红光的光强、所述蓝光的光强以及所述绿光的光强大于所述环境光中相同色光的光强。
  15. 根据权利要求14所述的柔性显示装置，其中，所述红光照射、所述蓝光照射以及所述绿光照射由所述柔性显示面板提供。
  16. 根据权利要求10所述的柔性显示装置，其中，所述光响应聚合物选自偶氮聚合物或偶氮衍生物聚合物。
  17. 根据权利要求16所述的柔性显示装置，其中，所述光响应聚合物为芳香偶氮聚合物。
  18. 根据权利要求10所述的柔性显示装置，其中，所述光响应聚合物的转变弛豫时间小于1s。
  19. 根据权利要求10所述的柔性显示装置，其中，所述柔性显示装置还包括触控层，所述触控层设置于所述盖板和所述柔性显示面板之间。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115240539A (zh) * 2021-04-22 2022-10-25 华为技术有限公司 一种屏幕盖板、其制备方法、显示模组和终端

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112670328A (zh) * 2020-12-21 2021-04-16 天马微电子股份有限公司 显示面板以及显示装置
CN115083272A (zh) * 2022-06-10 2022-09-20 武汉华星光电半导体显示技术有限公司 柔性显示装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106910432A (zh) * 2017-05-10 2017-06-30 京东方科技集团股份有限公司 一种柔性显示装置及其控制方法
CN108281549A (zh) * 2018-02-05 2018-07-13 深圳市华星光电技术有限公司 制作柔性显示器的基板及柔性显示器的制作方法
CN108766244A (zh) * 2018-06-06 2018-11-06 京东方科技集团股份有限公司 一种柔性显示面板及其制备方法、显示装置
CN109345958A (zh) * 2018-09-25 2019-02-15 武汉华星光电半导体显示技术有限公司 用于柔性显示屏的盖板和柔性显示屏
CN109448553A (zh) * 2018-11-22 2019-03-08 京东方科技集团股份有限公司 盖板、显示装置以及盖板制作方法
KR20190043349A (ko) * 2017-10-18 2019-04-26 엘지디스플레이 주식회사 플렉서블 영상 표시용 지지 프레임 및 이를 포함하는 플렉서블 표시장치
KR20190078226A (ko) * 2017-12-26 2019-07-04 엘지디스플레이 주식회사 플렉서블 표시장치
CN110047393A (zh) * 2019-04-28 2019-07-23 武汉华星光电半导体显示技术有限公司 一种可弯折显示面板的盖板、可弯折显示面板及显示装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20150002148A (ko) * 2013-06-28 2015-01-07 한국과학기술원 접히는 투명 복합체 커버 윈도우, 이의 제조 방법, 및 이를 포함하는 접히는 디스플레이 장치
CN208428776U (zh) * 2018-06-15 2019-01-25 深圳市柔宇科技有限公司 柔性盖板及柔性电子装置
CN208589222U (zh) * 2018-08-17 2019-03-08 京东方科技集团股份有限公司 一种盖板和一种显示装置
CN109920331B (zh) * 2019-02-23 2020-05-05 昆山工研院新型平板显示技术中心有限公司 显示面板及显示装置

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106910432A (zh) * 2017-05-10 2017-06-30 京东方科技集团股份有限公司 一种柔性显示装置及其控制方法
KR20190043349A (ko) * 2017-10-18 2019-04-26 엘지디스플레이 주식회사 플렉서블 영상 표시용 지지 프레임 및 이를 포함하는 플렉서블 표시장치
KR20190078226A (ko) * 2017-12-26 2019-07-04 엘지디스플레이 주식회사 플렉서블 표시장치
CN108281549A (zh) * 2018-02-05 2018-07-13 深圳市华星光电技术有限公司 制作柔性显示器的基板及柔性显示器的制作方法
CN108766244A (zh) * 2018-06-06 2018-11-06 京东方科技集团股份有限公司 一种柔性显示面板及其制备方法、显示装置
CN109345958A (zh) * 2018-09-25 2019-02-15 武汉华星光电半导体显示技术有限公司 用于柔性显示屏的盖板和柔性显示屏
CN109448553A (zh) * 2018-11-22 2019-03-08 京东方科技集团股份有限公司 盖板、显示装置以及盖板制作方法
CN110047393A (zh) * 2019-04-28 2019-07-23 武汉华星光电半导体显示技术有限公司 一种可弯折显示面板的盖板、可弯折显示面板及显示装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115240539A (zh) * 2021-04-22 2022-10-25 华为技术有限公司 一种屏幕盖板、其制备方法、显示模组和终端

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