WO2024000639A1 - 显示模组及显示装置 - Google Patents

显示模组及显示装置 Download PDF

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Publication number
WO2024000639A1
WO2024000639A1 PCT/CN2022/104969 CN2022104969W WO2024000639A1 WO 2024000639 A1 WO2024000639 A1 WO 2024000639A1 CN 2022104969 W CN2022104969 W CN 2022104969W WO 2024000639 A1 WO2024000639 A1 WO 2024000639A1
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Prior art keywords
layer
display module
hard
hard layer
surface hardness
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PCT/CN2022/104969
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English (en)
French (fr)
Inventor
胡晓静
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武汉华星光电半导体显示技术有限公司
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Priority to US17/759,855 priority Critical patent/US20240188385A1/en
Publication of WO2024000639A1 publication Critical patent/WO2024000639A1/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
    • 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
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • 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
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/351—Thickness
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Definitions

  • the present invention relates to the technical field of manufacturing display panels, and in particular, to a display module and a display device.
  • embodiments of the present invention provide a display module and a display device to effectively improve the bending performance of the flexible display device and the problem that scratches are easily formed on the surface of the film layer during operations such as touch, and improve the Quality and overall performance of flexible display devices.
  • a display module including:
  • a light-emitting layer arranged on one side of the substrate
  • a cover plate disposed on the side of the luminescent layer away from the substrate, the cover plate including: a protective layer and a hard layer disposed on the side of the luminescent layer away from the substrate in sequence, the hard layer
  • the surface hardness of the layer is greater than the surface hardness of the protective layer, and the thickness of the protective layer is less than or equal to 50um;
  • the hard layer includes a plurality of filling areas and a non-filling area arranged on one side of the filling area;
  • a reinforcement layer is provided in the filling area, and the surface hardness of the reinforcement layer is 0.6H-1.2H greater than the hardness of the hard layer in the non-filling area.
  • the ratio of the thickness of the hard layer to the thickness of the protective layer ranges from 0.05 to 0.15.
  • the surface hardness of the hard layer ranges from 5H to 9H
  • the surface hardness of the protective layer ranges from 3H to 5H.
  • the hard layer includes a hybrid organic and inorganic composite material
  • the protective layer includes ultra-thin glass
  • the display module further includes a buffer layer, and the buffer layer is disposed between the light-emitting layer and the cover plate.
  • an embodiment of the present invention also provides a display module, including:
  • a light-emitting layer arranged on one side of the substrate
  • a cover plate disposed on the side of the luminescent layer away from the substrate, the cover plate including: a protective layer and a hard layer disposed on the side of the luminescent layer away from the substrate in sequence, the hard layer
  • the surface hardness of the layer is greater than the surface hardness of the protective layer, and the thickness of the protective layer is less than or equal to 50um.
  • the ratio of the thickness of the hard layer to the thickness of the protective layer ranges from 0.05 to 0.15.
  • the surface hardness of the hard layer ranges from 5H to 9H
  • the surface hardness of the protective layer ranges from 3H to 5H.
  • the hard layer includes an organic and inorganic hybrid composite material
  • the protective layer includes ultra-thin glass
  • the display module further includes a buffer layer, and the buffer layer is disposed between the light-emitting layer and the cover plate.
  • the display module further includes a buffer layer, and the buffer layer is disposed between the light-emitting layer and the cover plate.
  • the interior of the buffer layer includes a honeycomb structure.
  • the ratio between the thickness of the buffer layer and the thickness of the cover plate ranges from 1 to 3.
  • the distance between the buffer layer and the cover plate is less than 150um.
  • the hard layer includes a plurality of filling areas and a non-filling area provided on one side of the filling area;
  • a reinforcement layer is provided in the filling area, and the surface hardness of the reinforcement layer is greater than the surface hardness of the hard layer in the non-filling area.
  • the filling areas are spaced on the hard layer, and the distribution density of the filling areas corresponding to the edge areas of the hard layer is greater than that of the filling areas in the center area of the hard layer.
  • the distribution density of the filling area is greater than that of the filling areas in the center area of the hard layer.
  • the hard layer includes a first hard layer, a flexible layer and a second hard layer.
  • the first hard layer is provided on the protective layer, and the flexible layer is provided on the protective layer.
  • the second hard layer is provided on the flexible layer;
  • the surface hardness of the first hard layer is greater than the surface hardness of the second hard layer.
  • the display module further includes a buffer layer, and the second hard layer is configured as a grid-like hollow structure.
  • micro-protrusions are provided on a surface of a side of the second hard layer close to the first hard layer.
  • a display device is also provided.
  • the display device includes the display module provided in the embodiment of the present application.
  • Embodiments of the present invention provide a display module and a display device, wherein the display module includes a substrate, a luminescent layer and a cover plate, wherein the cover plate includes a protective layer sequentially disposed on the side of the luminescent layer away from the substrate; Hard layer, the surface hardness of the hard layer is greater than the surface hardness of the protective layer, and the thickness of the protective layer is less than or equal to 50um.
  • the display module A buffer layer is also provided within the group, which can further protect the bending and touch process of the display module, thus improving the quality and other comprehensive performance of the flexible display device.
  • Figure 1 is a schematic diagram of the structure of each film layer of a flexible display device provided in the prior art
  • Figure 2 is a schematic diagram of the film layer structure of a flexible display device provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of the cover plate provided in the embodiment of the present application.
  • Figure 4 is a schematic plan view of the cover plate provided in the embodiment of the present application.
  • Figure 5 is a schematic diagram of the internal structure of the buffer layer provided in the embodiment of the present application.
  • Figure 6 is a schematic diagram of the film layer structure of another flexible display device provided by an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of the folded flexible display device provided in the embodiment of the present application.
  • Figure 8 is a schematic diagram of the film structure of the hard layer provided by the embodiment of the present application.
  • Figure 9 is a schematic cross-sectional view of the hard layer provided in the embodiment of the present application.
  • Figure 10 is a schematic diagram of the film structure of another hard layer provided by an embodiment of the present application.
  • Figure 11 is another structural schematic diagram of the hard layer provided in the embodiment of the present application.
  • Figure 1 is a schematic diagram of the structure of each film layer of a flexible display device provided in the prior art.
  • the display device includes a display module 100, an optical adhesive layer 101, a first cover plate 102, an optical adhesive layer 103 and a second cover plate 104.
  • the optical adhesive layer 101 and the optical adhesive layer 103 mainly serve the function of sticking
  • the first cover plate 102 and the second cover plate 104 mainly serve the functions of support and protection. Since the flexible display panel can be bent or folded, the thickness of each film layer is thin and the bending performance is good.
  • the bending performance is usually improved by reducing the hardness of the first cover plate 102 and the second cover plate 104 .
  • the hardness of the first cover 102 and the second cover 104 decreases, when a stylus or other object is used to touch or slide on the surface, more scratches will be left on the surface, thereby reducing the improve the quality and overall performance of flexible display devices.
  • Embodiments of the present application provide a display module and a display device to effectively improve the bending performance of the flexible display panel and the problem that scratches are easily formed on the surface film layer, thereby improving the quality and overall performance of the display device.
  • FIG. 2 is a schematic diagram of the film layer structure of a display device provided by an embodiment of the present application.
  • the display device provided in the embodiments of the present application is explained by taking a flexible display device as an example.
  • a display module is provided in the flexible display device.
  • the display module includes a stacked structure of multiple film layers.
  • the display module includes a display panel 20 and a cover 21 .
  • the cover 21 is disposed on the display panel 20 to protect the display panel 20 .
  • the display panel 20 is a flexible bendable or foldable panel, thereby achieving the bending performance of the display device.
  • the flexible display panel 20 is provided with a multi-film layer structure.
  • the display panel 20 is provided with a first optical adhesive layer 206, a buffer layer 205, a second optical adhesive layer 204, a polarizer 203, a light emitting layer 212, a first supporting back plate 202, a second buffer layer 201 and a metal supporting layer 200.
  • the second buffer layer 201 is disposed on the metal support layer 200, the second buffer layer 201 is directly attached to the metal support layer 200, and the first support backing plate 202 is disposed on the second buffer layer 201.
  • both the first supporting back plate 202 and the metal supporting layer 200 can play a certain role in fixing and supporting.
  • the first supporting back plate 202 and the metal supporting layer 200 can be made of the same material.
  • the metal supporting layer 200 can be made of a metal material with good heat dissipation performance, such as metal steel, aluminum and other materials.
  • the metal support layer 200 can absorb excess heat generated inside the display panel and dissipate the excess heat to the outside of the display module, thereby ensuring the stability of the internal temperature of the display device.
  • the metal support layer 200 can be made of steel sheets or other materials.
  • the light-emitting layer 212 is disposed on the first supporting back plate 202, and the light-emitting layer 212 is supported and fixed by the first supporting back plate 202.
  • a polarizer 203 is also provided on the light-emitting layer 212 .
  • a second optical adhesive layer 204 is provided on the polarizer 203, and a buffer layer 205 is provided on the second optical adhesive layer 204. The polarizer 203 and the buffer layer 205 are bonded and fixed through the second optical adhesive layer 204 .
  • the first optical glue layer 206 is disposed on the buffer layer 205, and the cover plate 21 is disposed on the first optical glue layer 206.
  • the first optical glue layer 206 connects the cover plate 21 to the inside of the display panel.
  • the buffer layer 205 is bonded together and forms the display module provided in the embodiment of the present application.
  • first optical glue layer 206 and the second optical glue layer 204 can be set to the same film layer and material, for example, the first optical glue layer 206 and the second optical glue layer 204 are both set to the same thickness, and the The first optical adhesive layer 206 and the second optical adhesive layer 204 both use pressure-sensitive adhesive with higher light transmittance or other adhesive materials with better adhesiveness.
  • a cover 21 is provided on the flexible display panel.
  • the cover 21 not only has good bending and folding properties, but also has high strength and hardness.
  • a stylus is used to perform touch operations on the cover 21, no scratches will be left on the cover 21. Remove scratches and other marks, thereby effectively improving the overall performance of the flexible display device.
  • Figure 3 is a schematic structural diagram of the cover plate 21 provided in the embodiment of the present application.
  • the cover 21 includes a hard layer 208 and a protective layer 207 arranged in sequence.
  • the hard layer 208 is disposed on the protective layer 207
  • the hard layer 208 is disposed on a side of the protective layer away from the light-emitting layer 212 .
  • the hard layer 208 and the protective layer 207 are combined to form the cover 21 .
  • the surface hardness of the hard layer 208 is greater than the surface hardness of the protective layer 207 . Since the surface hardness of the hard layer 208 is relatively high, when a stylus is used to touch and slide on the hard layer 208 , the stylus will not leave traces on the hard layer 208 .
  • the thickness of the protective layer 207 is less than or equal to 50um.
  • the thickness of the protective layer 207 is set between 30um and 50um, such as 50um. This ensures that it can achieve an ultra-thin panel while having a good supporting effect.
  • the surface hardness of the hard layer 208 is set to between 5H and 9H. Specifically, the surface hardness can be set according to the touch area and product model of the actual product.
  • the hard layer 208 can be directly coated on the protective layer 207 through a wet coating process, and dried to form a final hard film layer. Or the hard layer 208 can be directly attached to the protective layer 207 to improve the surface strength of the flexible display device provided in the embodiment of the present application.
  • the material of the hard layer 208 is a protective composite material that is a mixture or hybrid of organic and inorganic phases.
  • the material of the hard layer 208 is selected as an inorganic-organic material containing silicon.
  • the material of the hard layer 208 is a polymer of siloxane and acrylic, a semisiloxane polymer, and an inorganic silicon-based material. Any of aliphatic or aromatic polymer groups.
  • the surface hardness of the hard layer 208 can reach more than 7H.
  • the hardness of the stylus tip Generally between 3H-4H. Therefore, when the stylus slides, it will not leave scratches on the surface of the hard layer 208.
  • the hard layer 208 in the embodiment of the present application also has good recovery performance. For example, when the stylus or other hard object slides on the surface, when a larger force is used, smaller marks will be left on the surface.
  • the hard layer 208 has a self-healing function: when the stylus or other force-exerting object is removed, the marks formed by it can automatically repair and heal. Therefore, when the user observes, the surface of the hard layer 208 is still a flat surface. Therefore, the hard layer 208 in the embodiment of the present application effectively improves the performance of the film layer surface of the device and improves its overall performance.
  • the surface of the hard layer 208 can be provided with more siloxane organic materials. Since the siloxane organic material Polymer materials have good resilience properties, allowing micro-scratches formed on their surfaces to heal and disappear automatically. Specifically, the traces on the surface of the hard layer 208 can be slowly healed within 3 to 15 seconds during automatic repair and healing.
  • the film thickness of the hard layer 208 is set to 3um-40um.
  • the surface of the hard layer 208 has good oil resistance.
  • Figure 4 is a schematic plan view of the cover plate provided in the embodiment of the present application.
  • the cover plate 21 of the display module includes a bent area 400 and a straight area 401, wherein the straight area 401 is provided at least on one side of the bent area 400.
  • the cover plate 21 When the display module bends, the cover plate 21 will bend accordingly. Therefore, when the hard layer in the cover plate 21 is provided in the embodiment of the present application, the thickness of the hard layer can have an effect according to the bending force in different areas. Make settings. Preferably, in the embodiment of the present application, the hard layer is provided with the same thickness in different areas of the protective layer, thereby ensuring the performance of the hard layer.
  • the flexible display device in the embodiment of the present application can achieve a small or ultra-small bending radius.
  • the bending radius can be less than 1.5 mm. Since the bending radius is small, the bending stress is the largest in the bending area 400 . Therefore, in the embodiment of the present application, the thickness of the film layer at the central area of the bending area 400 can be smaller than the thickness of the hard layer at the edge area of the bending area 400, thereby ensuring the strengthening effect of the hard layer.
  • the flexible display device still has good bending performance.
  • the film thickness of the hard layer can gradually decrease from the straight region 401 to the bent region 400 .
  • the thickness of the hard layer decreases linearly.
  • the specific reduction range can be set according to the bending radius of the actual product. As a result, the film layers in different areas have better bending effects and performance.
  • Figure 8 is a schematic diagram of the film structure of the hard layer provided by the embodiment of the present application.
  • Figure 9 is a schematic cross-sectional view of the hard layer provided in the embodiment of the present application.
  • the hard layer 208 in the embodiment of the present application includes a plurality of filled areas 606 and non-filled areas 607. Through holes are provided at the positions of the filling areas 606 .
  • the shape of the filling area 606 and the structure of the through hole are the same as an example for description.
  • a reinforcement layer 608 is provided in the filling area 606 .
  • the reinforcement layer 608 fills each filling area, and when setting the filling area 606, the structure of each filling area 606 can be set to the same structure to ensure the consistency of the preparation process.
  • the plurality of filling areas 606 may be distributed in an array on the hard layer 208 .
  • the filling regions 606 are arranged in an array on the rows and columns corresponding to the hard layer 208, and the filling regions 606 are spaced apart on the hard layer.
  • the surface hardness of the reinforcement layer 608 is greater than the surface hardness of the corresponding hard layer in the non-filled area 607.
  • the harder reinforced layer can prevent the stylus from forming scratches on it.
  • the hard layer in the non-filled area The hard layer 208 can ensure that the film layer has good flexibility, thereby improving the overall performance of the panel.
  • the hardness of the reinforcement layer 608 can be 0.6H-1.2H greater than the hardness of the hard layer in the non-filled area 607.
  • the surface hardness of the reinforcement layer 608 is 1H greater than the surface hardness of the hard layer.
  • the distribution density of the corresponding reinforcement layer in the edge area of the hard layer can be greater than the distribution density of the corresponding reinforcement layer in the central area. Thereby ensuring the bending effect of the hard layer.
  • Figure 10 is a schematic diagram of the film structure of another hard layer provided by an embodiment of the present application.
  • the hard layer 208 also includes a multi-layer film structure.
  • the hard layer 208 includes a first hard layer 33 , a flexible layer 34 and a second hard layer 35 .
  • the second hard layer 35 is provided on the protective layer 207
  • the flexible layer 34 is provided on the second hard layer 35
  • the first hard layer 33 is provided on the flexible layer 34 .
  • the material hardness corresponding to the flexible layer is smaller than the material hardness of the first hard layer 33 and the second hard layer 35 .
  • the surface hardness of the first hard layer 33 may be greater than the surface hardness of the second hard layer 35 .
  • the surface hardness of the first hard layer 33 is 0.3H greater than the surface hardness of the second hard layer. Therefore, without reducing the high hardness of the hard layer, the hard layer also has a certain elastic recovery performance, thereby improving the performance of the display panel.
  • the second hard layer 35 can also be provided with a grid-like structure, such as a hollow grid structure.
  • the hollow grid can be set into structures such as polygonal grids, circular grids, and strip grids.
  • the specific structure can be set according to the needs of the actual product. By setting it as a hollow structure, the bending performance of the hard layer is improved.
  • the grid structure further increases the bending performance of the film layer, when the hard layer is bent, bending is more likely to occur.
  • the above-mentioned hollow grid can also be filled with flexible glue to ensure that the hard layer has better overall performance.
  • the thickness of the first hard layer 33 is greater than the thickness of the second hard layer 35.
  • the thickness of the flexible layer 34 can be set according to the actual product requirements and the overall thickness, which will not be specified here. limited.
  • Figure 11 is another structural schematic diagram of the hard layer provided in the embodiment of the present application.
  • a micro-protrusion 66 structure is also provided on the surface of the second hard layer 35 close to the first hard layer 33 .
  • the micro-protrusions 66 may be configured as wavy protrusions or other shaped structures.
  • the structure of the micro-protrusions can be set according to the size of the actual product.
  • the hard layer 208 is configured as a transparent hard layer. And ensure that the light transmittance of the hard layer 208 is greater than 90%. Thereby reducing the light blocking by the hard layer and effectively improving the display effect of the flexible display device.
  • a protective layer 207 is also provided in the cover plate 21 in the embodiment of the present application.
  • the protective layer 207 is adhered to the flexible display panel.
  • the surface hardness of the protective layer 207 is smaller than the surface hardness of the hard layer.
  • the surface hardness of the protective layer 207 can be set to 3H-5H, and the ratio between the thickness of the hard layer and the thickness of the protective layer is between 0.05-0.15. Since the thickness of the protective layer 207 is small, the hard layer can well strengthen the strength of its surface.
  • the thickness of the hard layer is set to 6um, and the corresponding thickness of the protective layer is set to 50um.
  • the ratio between the thickness of the hard layer and the thickness of the protective layer is 0.12.
  • the protective layer 207 mainly plays a supporting role.
  • the stylus touches the display panel the problem of collapse will not occur, thereby improving the performance of the display panel.
  • the protective layer 207 can be selected as ultra-thin glass (UTG) or other organic film layers with certain hardness and support effect.
  • the protective layer 207 can be an outer cover of the flexible display device.
  • the thickness of the protective layer is set to less than or equal to 50um.
  • the thickness of the protective layer 207 is set between 30um and 50um, such as 50um. This ensures that it can achieve an ultra-thin panel while having a good supporting effect. If the protective layer 207 is within the above thickness range, it will not affect the bending performance of the flexible display device. At the same time, it can effectively realize an ultra-thin display device, thereby achieving the purpose of improving the overall performance of the flexible display device.
  • a buffer layer 205 is also provided in the flexible display panel.
  • the buffer layer 205 is provided between the flexible display panel and the cover.
  • the buffer layer 205 can be disposed within the film layer of the flexible display panel 20 .
  • the buffer layer 205 is provided between the first optical glue layer 206 and the second optical glue layer 204 .
  • the film layer material of the buffer layer 205 is set as a porous material, for example, the buffer layer 205 is set as a film layer with a dense honeycomb hole structure.
  • Figure 5 is a schematic diagram of the internal structure of the buffer layer provided in the embodiment of the present application.
  • the buffer layer 205 includes a plurality of honeycomb holes 501 inside.
  • the cross-sections of the plurality of honeycomb holes 501 in Figure 5 are all arranged in a hexagonal structure.
  • the cross-sectional shape of the honeycomb hole 501 can also be set to other structures, which will not be described in detail here.
  • the honeycomb hole 501 can be configured as either an open-cell honeycomb hole or a closed-cell honeycomb hole.
  • adjacent open-hole honeycombs can be connected to each other and form the above-mentioned dense hole structure.
  • the open-hole honeycomb can form a certain gas circulation channel, thereby increasing the sparseness inside the film layer. Confidence performance.
  • the interior of the buffer layer is configured as a closed-cell honeycomb
  • the two adjacent closed-cell honeycombs are isolated from each other and are not connected to each other. That is, there is no intersection area between adjacent honeycomb holes.
  • the honeycomb structure inside the buffer layer can be configured as any one of open cells, closed cells, and a mixed structure according to actual needs. Therefore, the specific honeycomb holes can be set according to the actual product, and are not specifically limited here.
  • the density of the honeycomb holes in different areas of the buffer layer can be set to the same density.
  • the size and shape of each honeycomb hole 501 in the buffer layer can be set to be the same or different.
  • the buffer layer has better symmetry, thereby improving the buffering effect of the buffer layer.
  • the ratio between the thickness of the buffer layer 205 and the thickness of the cover plate can be between 1 and 3 times.
  • the ratio between the thickness of the buffer layer 205 and the cover plate 21 is 2, or is set according to the bending radius of the actual product.
  • the distance between the buffer layer 205 and the cover plate is less than 150um.
  • the distance between the buffer layer 205 and the cover plate is set to 50um to ensure its buffering effect.
  • the material of the buffer layer 205 can be selected as thermoplastic polyurethane elastomer material or thermoplastic polyurethane elastomer rubber.
  • a foaming agent can be added to the above materials through a foaming process, and the thermoplastic polyurethane elastomer rubber material in the embodiment of the present application is prepared, and the material is disposed in the display module.
  • the buffer layer 205 has good elastic performance.
  • the elastic modulus of the buffer layer 205 is preferably 1Mpa-1Gpa, and the elongation at break of the buffer layer 205 is greater than or equal to 200%.
  • each film layer will be dented under the action of a large touch force.
  • the ultra-thin glass layer will be dented. Because the ultra-thin glass The hardness of the layer is relatively high. If it cannot be buffered, it will break and even affect the polarizer 203 in the lower layer, thus reducing the reliability and quality of the display device.
  • the buffer layer 205 by providing the buffer layer 205, the stress between the film layers can be effectively buffered, thereby protecting the ultra-thin glass layer and the polarizer 203.
  • Table 1 shows various experimental performance data of corresponding display devices under different film layers provided in the embodiments of the present application.
  • Plan 1 and Plan 2 are comparative experimental groups.
  • Scheme 1 uses a flexible display device prepared in the prior art
  • Scheme 2 uses a flexible display device prepared in an embodiment of the present application.
  • the cover plate in Scheme 1 uses a conventional cover layer
  • the cover plate uses the cover plate provided by the embodiment of the present application, such as ultra-thin glass.
  • the thermoplastic polyurethane elastomer rubber buffer layer in the embodiment of the present application is not provided in Solution 1, and the other film layers and structures are the same.
  • the flexible display device provided in the embodiments of the present application has better anti-scratch and bending properties than the flexible devices in the prior art.
  • FIG. 6 is a schematic diagram of the film layer structure of another flexible display device provided by an embodiment of the present application.
  • a depolarizer process is used for preparation.
  • the polarizer film layer is omitted in the display module.
  • the film structure of the luminescent layer 242 provided in the flexible display device is different from the structure of the luminescent layer provided in Figure 2.
  • the remaining film layer structures The arrangement can be made with reference to the structure in Figure 2, and finally the flexible display device in the embodiment of the present application is formed.
  • omitting the polarizer 203 can further reduce the thickness of the device, thereby effectively improving the bending performance of the device.
  • the flexible display device further includes a second protective layer 209, which is disposed on the outermost side of the flexible display device. That is, the second protective layer 209 is a surface film layer of the display device. The user can peel off or attach the second protective layer 209 according to personal preference.
  • the second protective layer 209 is mainly a flexible film layer material, such as polyethylene terephthalate, polyimide or other polymer flexible film layers.
  • the flexible display device provided in the embodiment of the present application also includes a flexible circuit board 211 and an integrated circuit 213.
  • the flexible circuit board 211 and the integrated circuit 213 are both disposed on one side of the display module, for example, both are disposed on one side of the luminescent layer 212, and are adhered to the extended portion of the luminescent layer 212. , thereby providing control signals to the light-emitting layer through the flexible circuit board 211.
  • the flexible display device also includes a second backplane 210 .
  • the second back plate 210 is disposed on one side of the light-emitting layer 212, and the second back plate 210 and the flexible circuit board 211 are respectively disposed on both sides of the light-emitting layer 212, so that the second back plate 210 is better
  • the luminescent layer is supported to further improve the reliability and comprehensive performance of the flexible display device.
  • the first support back plate 202 can be made of lightweight material, such as carbon fiber material that is easy to bend.
  • the first supporting back plate 202 is made of polyacrylonitrile-based carbon fiber, polyurethane resin carbon-based fiber, polyimide and other materials.
  • the thickness of the first supporting back plate 202 is set to less than 90um, so as to achieve a thin and light design while ensuring the performance of the display device.
  • the first supporting back plate 202 can also be configured as a hollow structure.
  • the first supporting back plate 202 can be configured as a plurality of hollow strip structures in its curved area.
  • a plurality of hollow strips are arranged alternately on the first supporting back plate 202 in sequence.
  • the hollow strips can effectively reduce the bending stress of the back plate when bending, thereby improving the bending performance of the flexible display device.
  • the hollow strips can further reduce the weight of the backplane, thereby achieving a thinner and lighter design of the flexible display device.
  • Figure 7 is a schematic structural diagram of the folded flexible display device provided in the embodiment of the present application.
  • the flexible display device 70 After the flexible display device 70 is folded, its volume and expansion area are reduced to half of the original size, and the flexible display device 70 has a smaller bending radius at the bending area 400 .
  • the bending radius is less than 1.5 mm, thereby achieving an ultra-small bending radius.
  • the flexible display device is unfolded and a stylus is used to slide on the surface, no scratches will be formed on the surface film layer, thereby effectively improving the quality and overall performance of the flexible display device.
  • the display module and display device can be applied to any product or component with flexible bending or folding functions such as mobile phones, computers, laptops, digital photo frames, etc.
  • the specific type is not specifically limited.

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Abstract

一种显示模组及显示装置(70)，显示模组包括衬底、发光层(212,242)及盖板(21)，盖板(21)包括硬质层(208)及保护层(207)。硬质层(208)的表面硬度大于保护层(207)的表面硬度，保护层(207)的厚度小于等于50um。当使用触控笔对柔性面板触控时，硬质层(208)能防止其表面出现划痕，同时显示模组具有较好的弯折性能，进而提高柔性显示装置(70)的综合性能。

Description

显示模组及显示装置 技术领域
本发明涉及显示面板的制造技术领域，尤其涉及一种显示模组及显示装置。
背景技术
随着显示面板制备工艺等显示技术的发展，人们对显示面板及显示装置的性能和质量均提出了更高的要求。
其中，柔性材料的发展及日渐成熟，具备柔性可折叠有机发光二极管(Organic light-emitting diode，OLED)器件的手机设备掀起近年高端手机的浪潮。越来越多的手机厂商投入到柔性可折叠手机的开发中。对于柔性显示面板而言，由于柔性面板具有较好弯曲性能，其可随使用工况的不同而进行一定程度的弯曲或者折叠，因此，被广泛应用于多种领域中。对于柔性显示面板而言，由于其可弯曲和折叠的特点，因此，就要求显示面板内的膜层具有较好的弯曲性能。但是，现有技术中制备的到的显示面板虽然能在一定程度上保证其弯曲和折叠性能，却无法保证对应的膜层的硬度和强度。并且现有的柔性显示面板中通常配备有触控笔以提高操作性能，当使用者使用触控笔对柔性显示面板进行触控或在其上滑动时，由于该柔性膜层的硬度和强度不理想，很容易在该触控的膜层上留下划痕，严重情况甚至会造成该膜层开裂，进而降低其柔性装置的可靠性和质量，不利于柔性显示面板综合性能的进一步提高。
因此需要对现有技术中的问题提出解决方法。
技术问题
综上所述，现有技术中提供的柔性显示面板及显示装置中，当在该柔性显示面板及装置的表面进行触控等操作时，容易在膜层表面形成多条划痕，进而降低使用感受，不利于柔性显示设备的综合性能的提高。
技术解决方案
为解决上述问题，本发明实施例提供一种显示模组及显示装置，以有效的改善柔性显示装置的弯曲性能以及在进行触控等操作时，膜层表面容易形成划痕的问题，并提高柔性显示装置的质量及综合性能。
为解决上述技术问题，本发明提供一种显示模组，包括：
衬底；
发光层，设置在所述衬底的一侧；
盖板，设置在所述发光层远离所述衬底的一侧，所述盖板包括：依次设置在所述发光层远离所述衬底一侧的保护层和硬质层，所述硬质层的表面硬度大于所述保护层的表面硬度，所述保护层的厚度小于等于50um；
其中，所述硬质层包括多个填充区域以及设置在所述填充区域一侧的非填充区域；
所述填充区域内设置有强化层，所述强化层的表面硬度比非填充区域内的硬质层的硬度大0.6H-1.2H。
根据本发明一实施例，所述硬质层的厚度与所述保护层厚度的比值范围为0.05-0.15。
根据本发明一实施例，所述硬质层的表面硬度范围为5H-9H，所述保护层的表面硬度范围为3H-5H。
根据本发明一实施例，所述硬质层包含有机与无机杂化的复合材料，所述保护层包括超薄玻璃。
根据本发明一实施例，所述显示模组还包括缓冲层，所述缓冲层设置在所述发光层与所述盖板之间。
根据本发明实施例提供第二方面，还提供一种显示模组，包括：
衬底；
发光层，设置在所述衬底的一侧；
盖板，设置在所述发光层远离所述衬底的一侧，所述盖板包括：依次设置在所述发光层远离所述衬底一侧的保护层和硬质层，所述硬质层的表面硬度大于所述保护层的表面硬度，所述保护层的厚度小于等于50um。
根据本发明一实施例，所述硬质层的厚度与所述保护层厚度的比值范围为0.05-0.15。
根据本发明一实施例，所述硬质层的表面硬度范围为5H-9H，所述保护层的表面硬度范围为3H-5H。
根据本发明一实施例，所述硬质层包含有机与无机杂化的复合材料，所述保护层包括超薄玻璃。
根据本发明一实施例，所述显示模组还包括缓冲层，所述缓冲层设置在所述发光层与所述盖板之间。
根据本发明一实施例，所述显示模组还包括缓冲层，所述缓冲层设置在所述发光层与所述盖板之间。
根据本发明一实施例，所述缓冲层的内部包括蜂窝孔结构。
根据本发明一实施例，所述缓冲层的厚度与所述盖板的厚度之间的比值范围为1-3。
根据本发明一实施例，所述缓冲层与所述盖板之间的距离小于150um。
根据本发明一实施例，所述硬质层包括多个填充区域以及设置在所述填充区域一侧的非填充区域；
其中，所述填充区域内设置有强化层，所述强化层的表面硬度大于所述非填充区域内的所述硬质层的表面硬度。
根据本发明一实施例，所述填充区域间隔的设置在所述硬质层上，且所述硬质层边缘区域对应的所述填充区域的分布密度，大于所述硬质层中心区域处对应的所述填充区域的分布密度。
根据本发明一实施例，所述硬质层包括第一硬质层、柔性层以及第二硬质层，所述第一硬质层设置在所述保护层上，所述柔性层设置在上第一硬质层上，所述第二硬质层设置在所述柔性层上；
其中，所述第一硬质层的表面硬度大于所述第二硬质层的表面硬度。
根据本发明一实施例，所述显示模组还包括缓冲层，所述第二硬质层设置为网格状镂空结构。
根据本发明一实施例，所述第二硬质层靠近所述第一硬质层的一侧的表面上设置有微凸起。
根据本发明实施例的第三方面，还提供一种显示装置，显示装置包括本申请实施例中提供的显示模组。
有益效果
综上所述，本发明实施例的有益效果为：
本发明实施例提供一种显示模组及显示装置，其中，该显示模组包括衬底、发光层以及盖板，其中，该盖板包括依次设置在发光层远离衬底一侧的保护层和硬质层，该硬质层的表面硬度大于保护层的表面硬度，且保护层的厚度小于等于50um。当使用触控笔等物品对该柔性面板进行触控时，该硬质层具有一定的硬度和强度，进而降低该触控笔在柔性膜层表面上形成的划痕问题，同时，该显示模组内还设置有缓冲层，能进一步的对显示模组的弯曲以及触控过程进行保护，从而提高了柔性显示装置的质量等综合性能。
附图说明
图1为现有技术中提供的柔性显示装置的各膜层结构示意图；
图2为本申请实施例提供的一种柔性显示装置的膜层结构示意图；
图3为本申请实施例中提供的该盖板的结构示意图；
图4为本申请实施例中提供的该盖板的平面示意图；
图5为本申请实施例中提供的缓冲层的内部结构示意图；
图6为本申请实施例提供的另一柔性显示装置的膜层结构示意图；
图7为本申请实施例中提供的柔性显示装置折叠后的结构示意图；
图8为本申请实施例提供的硬质层的膜层结构示意图；
图9为本申请实施例中提供的硬质层的截面示意图；
图10为本申请实施例提供的另一硬质层的膜层结构示意图；
图11为本申请实施例中提供的硬质层的再一结构示意图。
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。
随着显示面板制备技术的不断发展，尤其是对于柔性折叠显示装置制备技术的发展，人们对柔性弯曲以及折叠显示装置的性能和显示效果提出了更高的要求。
如图1所示，图1为现有技术中提供的柔性显示装置的各膜层结构示意图。该显示装置包括显示模组100、光学胶层101、第一盖板102、光学胶层103以及第二盖板104。其中，光学胶层101和光学胶层103主要起到粘贴功能，第一盖板102和第二盖板104主要用来支撑和保护的作用。由于柔性显示面板可弯曲或者折叠，因此，各膜层的厚度较薄，且弯曲性能好。
为了不降低该柔性显示装置的弯曲性能，因此，现有技术中，通常通过降低该第一盖板102和第二盖板104的硬度来提高其弯曲性能。而当该第一盖板102和第二盖板104的硬度降低时，当使用触控笔等物体在其表面进行触控或滑动时，其表面就会留下较多的划痕，进而降低了柔性显示装置的质量以及综合性能。
本申请实施例提供一种显示模组及显示装置，以有效的改善柔性显示面板的弯曲性能以及其表面膜层容易形成划痕的问题，以提高显示装置的质量和综合性能。
如图2所示，图2为本申请实施例提供的一种显示装置的膜层结构示意图。本申请实施例中提供的显示装置以柔性显示装置为例进行说明。该柔性显示装置内设置有显示模组，具体的，该显示模组包括多膜层的堆叠结构。如该显示模组包括显示面板20以及盖板21。其中，该盖板21设置在该显示面板20之上，以对显示面板20进行保护。本申请实施例中，该显示面板20为柔性可弯折或折叠面板，且从而实现显示装置的弯曲性能。
具体的，本申请实施例中，该柔性显示面板20内设置为多膜层的结构。显示面板20内设置有第一光学胶层206、缓冲层205、第二光学胶层204、偏光片203、发光层212、第一支撑背板202、第二缓冲层201以及金属支撑层200。
其中，该第二缓冲层201设置在金属支撑层200上，第二缓冲层201直接与该金属支撑层200相贴合，第一支撑背板202设置在该第二缓冲层201上，本申请实施例中，该第一支撑背板202和金属支撑层200均可起到一定的固定以及支撑的作用。
同时，该第一支撑背板202和金属支撑层200可选用相同的材料，优选的，该金属支撑层200可选用散热性能较好的金属材料，如金属钢、铝等材料。当显示面板正常工作时，该金属支撑层200可吸收显示面板内部产生的多余热量，并将多余的热量散出到显示模组外部，从而保证显示装置内部温度的稳定。优选的，金属支撑层200可为钢片等材料。
进一步的，该发光层212设置在第一支撑背板202上，通过该第一支撑背板202对发光层212进行支撑并固定。同时，在该发光层212上还设置有偏光片203。以及在该偏光片203上设置有第二光学胶层204，在该第二光学胶层204上设置有缓冲层205。通过该第二光学胶层204将偏光片203与缓冲层205相粘合并固定。
优选的，该第一光学胶层206设置在该缓冲层205上，且盖板21设置在该第一光学胶层206上，通过该第一光学胶层206将盖板21与该显示面板内的缓冲层205相粘合，并形成本申请实施例中提供的显示模组。
其中，该第一光学胶层206和第二光学胶层204可设置为相同的膜层及材料，如该第一光学胶层206和第二光学胶层204均设置为相同的厚度，且该第一光学胶层206和第二光学胶层204均采用具有较高透光率的压敏胶或者其他粘接性较好的粘接材料。
进一步的，在本申请实施例中，该柔性显示面板上设置有盖板21。具体的，该盖板21不仅具有较好的弯曲以及折叠性能，同时具 有较高的强度和硬度，当使用触控笔在其上进行触控等操作时，不会在该盖板21上留下划痕等痕迹，进而有效的提高了柔性显示装置的综合性能。
具体的，如图3所示，图3为本申请实施例中提供的该盖板21的结构示意图。结合图2中的装置结构，该盖板21包括依次设置的硬质层208以及保护层207。其中，该硬质层208设置在保护层207上，且硬质层208设置在该保护层远离发光层212的一侧膜层上。
本申请实施例中，硬质层208和保护层207相结合并形成该盖板21。其中，该硬质层208的表面硬度大于该保护层207的表面硬度值。由于该硬质层208的表面硬度较大，因此，当使用触控笔在该硬质层208上进行触控滑动时，触控笔不会在该硬质层208上留下痕迹。
同时，本申请实施例中，该保护层207的厚度小于等于50um。优选的，在设置时，该保护层207的厚度设置在30um-50um之间，如设置为50um。从而保证其在具有较好的支撑作用的同时还能实现超薄面板。
优选的，本申请实施例中，该硬质层208的表面硬度设置为5H-9H之间，具体的，其表面硬度大小可根据实际产品的触控面积以及产品型号进行设定。同时，在设置该硬质层208时，该硬质层208可通过湿法涂布工艺直接涂布在该保护层207上，并干燥形成最终的硬质膜层。或者将设置好的该硬质层208直接贴附在该保护层207上，以提高本申请实施例中提供的柔性显示装置的表面强度。
进一步的，本申请实施例中，该硬质层208的材料为保护有机与无机相杂糅或杂化的复合材料。如，该硬质层208的材料选取为含有硅的无机-有机材料，具体的，该硬质层208的材料为硅氧烷与亚克力的聚合物、半硅氧烷聚合物以及含有无机硅基团的脂族或芳香族聚合物中的任意一种。
当该硬质层208的材料选取为硅氧烷与亚克力的聚合物材料时，该硬质层208的表面硬度可达到7H以上，当使用触控笔进行触控时，该触控笔尖的硬度一般为3H-4H之间。因此，该触控笔滑动时，不 会在该硬质层208的表面留下划痕。
进一步的，本申请实施例中的该硬质层208还具有较好的回复性能。如，当该触控笔或者其他较硬的物体在其表面进行滑动时，当采用较大的力进行作用时，会在表面留下较小程度的痕迹。但是，该硬质层208具有自修复功能：当触控笔或其他施力物体离开后，其形成的为痕迹能自动修复并愈合。从而，使用者在进行观察时，该硬质层208的表面仍为一平整的表面。因此，本申请实施例中的硬质层208有效的提高了该装置膜层表面的性能，并提高其综合性能。
其中，本申请实施例中，由于该硬质层208为无机-有机相杂糅的材料，因此，可使得该硬质层208的表层设置较多的硅氧烷有机材料，由于该硅氧烷有机高分子材料具有较好的回复弹性性能，从而使得其表面形成的微划痕能自动愈合并消失。具体的，该硬质层208表面的痕迹在进行自动修复愈合时，在3s-15s内可缓慢愈合。
为了保证该硬质层208的作用效果，本申请实施例中，该硬质层208的膜层厚度设置为3um-40um，同时，该硬质层208的表面具有较好的抗油污性能。
优选的，如图4所示，图4为本申请实施例中提供的该盖板的平面示意图。该显示模组的盖板21包括弯折区域400以及平直区域401，其中，平直区域401至少设置在该弯折区域400的一侧。
当显示模组发生弯曲时，该盖板21会随之弯曲，因此本申请实施例在设置该盖板21内的硬质层时，该硬质层的厚度可根据不同区域的弯曲力作用效果进行设定。优选的，本申请实施例中，该硬质层在保护层的不同区域处，其设置的厚度均相同，从而保证该硬质层的性能。
同时，本申请实施例中的柔性显示装置可实现较小或超小的弯曲半径，具体的，该弯曲半径可低于1.5mm。由于弯曲半径较小，因此，在该弯折区域400内，其受到的弯曲应力最大。因此，本申请实施例中，在该弯折区域400中心区域处的膜层厚度可小于弯折区域400边缘区域处的该硬质层的膜层厚度，从而在保证硬质层强化作用效果的 同时，还使得该柔性显示装置仍具有较好的弯折性能。
进一步的，由于柔性面板在进行弯曲时，其弯曲会存在不规则弯曲的情况。因此，本申请实施例中，在设置该盖板21内的硬质层时，该硬质层的膜层厚度可从平直区域401向该弯折区域400，逐渐减小。优选的，该硬质层的厚度线性减小。其中，具体的减小变化幅度可根据实际产品的弯曲半径大小进行设定。从而使得不同区域处的膜层均具有较好的弯曲效果及性能。
进一步的，详见图8所示，图8为本申请实施例提供的硬质层的膜层结构示意图。以及图9所示，图9为本申请实施例中提供的硬质层的截面示意图。本申请实施例的该硬质层208包括多个填充区域606以及非填充区域607。在该填充区域606对位置处设置有通孔。本申请实施例中，该填充区域606的形状与该通孔的结构相同为例进行说明。同时，在该填充区域606内设置有强化层608。
具体的，该强化层608填充每一个填充区域，并且，在设置该填充区域606时，每个填充区域606的结构均可设置为相同的结构，以保证制备工艺的一致性。同时，该多个填充区域606可阵列的分布在该硬质层208上。优选的，该填充区域606在该硬质层208对应的行和列上阵列排布设置，且该填充区域606间隔的设置在硬质层上。
本申请实施例中，在设置每个填充区域606内的强化层608时，该强化层608的表面硬度大于该非填充区域607内对应的硬质层的表面硬度。当使用触控笔在该硬质层表面进行触控，并对该硬质层进行弯曲时，硬度较大的强化层能避免触控笔在其上形成划痕，同时，非填充区域内的硬质层208可保证该膜层具有较好的弯曲性，进而提高面板的综合性能。
具体的，该强化层608的硬度可比非填充区域607内的硬质层的硬度大0.6H-1.2H，优选的，该强化层608的表面硬度比硬质层的表面硬度大1H。
优选的，在设置上述强化层时，在硬质层边缘区域内对应的该强化层的分布密度可大于中心区域处对应的该强化层的分布密度。从而 保证该硬质层的弯曲效果。
详见图10所示，图10为本申请实施例提供的另一硬质层的膜层结构示意图。本申请实施例中，该硬质层208还包括多层膜层结构。具体的，该硬质层208包括第一硬质层33、柔性层34以及第二硬质层35。
其中，该第二硬质层35设置在保护层207上，柔性层34设置在第二硬质层35上，同时，该第一硬质层33设置在柔性层34上。本申请实施例中，为了提高其膜层的弯曲效果，该柔性层对应的材料硬度均小于第一硬质层33和第二硬质层35的材料硬度。
优选的，本申请实施例中，该第一硬质层33的表面硬度可大于第二硬质层35的表面硬度。具体的，第一硬质层33的表面硬度比第二硬质层的表面硬度大0.3H。从而在不降低硬质层具有较高硬度的前提下，使得唉硬质层还具有一定的弹性恢复性能，进而提高显示面板的性能。
同时，本申请实施例中，该第二硬质层35还可设置为网格状结构，如设置为镂空网格结构。其中，该镂空网格可设置为多边形网格、圆形网格以及长条网格等结构，具体的结构可根据实际产品的需求进行设置。通过设置为镂空结构，以提高硬质层的弯曲性能。并且，在本申请实施例中，由于网格结构进一步增大了该膜层的弯曲性能，当对该硬质层进行弯曲时，更容易发生弯曲。
进一步的，还可在上述镂空网格内填充柔性胶，以保证该硬质层具有较好的综合性能。本申请实施例中，上述第一硬质层33的厚度大于第二硬质层35的厚度，同时，该柔性层34的膜层厚度可根据实际产品的需求及总体厚度进行设置，这里不作具体限定。
进一步的，详见图11所示，图11为本申请实施例中提供的硬质层的再一结构示意图。本申请实施例中，在设置柔性层34及第二硬质层35时，该第二硬质层35靠近第一硬质层33一侧的表面上还设置有微凸起66结构。其中，该微凸起66可设置为波浪形凸起或者其他形状的结构。
本申请实施例中，相邻的两微凸起66之间存在一缓冲凹陷，当触控笔在第一硬质层上触控时，若该触控笔的触控力度较大，该较大的触控力在划到对应的缓冲凹陷内时，其部分作用力会被缓冲降低，进而降低其在硬性膜层上的作用力，从而达到减少划痕的目的。具体的，该微凸起的结构可根据实际产品的大小来进行设定。
优选的，本申请实施例中，该硬质层208设置为透明硬质层。且保证该硬质层208的光透过率大于90％。从而降低硬质层对光线的遮挡，并有效的提高柔性显示装置的显示效果。
进一步的，本申请实施例中的盖板21内还设置有保护层207。该保护层207与该柔性显示面板相贴合。本申请实施例中，该保护层207的表面硬度小于该硬质层的表面硬度。优选的，该保护层207的表面硬度可设置为3H-5H，同时，该硬质层的厚度与该保护层厚度之间的比值介于0.05-0.15之间。由于该保护层207的厚度较小，而该硬质层能很好的对其表面的强度进行强化。优选的，该硬质层的厚度设置为6um，同时，该保护层对应的厚度设置为50um。此时，该硬质层的厚度与该保护层的厚度之间的比值为0.12。从而通过对该盖板中不同的膜层之间的参数进行控制，以进一步提高面板的综合性能。或者根据实际产品对上述膜层参数进行限定，这里不再赘述。
本申请实施例中，该保护层207主要起到支撑的作用，当触控笔在显示面板上进行触控时，不会发生塌陷的问题，从而提高显示面板的性能。
具体的，该保护层207可选取为超薄玻璃(Ultra thin glass，UTG)或者其他具有一定硬度及支撑效果的有机膜层。本申请实施例中，该保护层207可为该柔性显示装置的外层盖板，通过在该柔性显示装置的最外层处设置超薄玻璃盖板，在不增加装置的厚度的情况下，可保证装置的可靠性以及质量。
优选的，该保护层的厚度设置为小于等于50um。优选的，在设置时，该保护层207的厚度设置在30um-50um之间，如设置为50um。从而保证其在具有较好的支撑作用的同时还能实现超薄面板。将该保 护层207在上述厚度范围内，不会对柔性显示装置的弯曲性能造成影响，同时，还能有效的实现超薄显示装置，进而达到提高柔性显示装置综合性能的目的。
进一步的，本申请实施例中，该柔性显示面板内还设置有缓冲层205。该缓冲层205设置在该柔性显示面板与盖板之间。具体的，可将该缓冲层205设置在该柔性显示面板20的膜层内。
其中，本申请实施例中，该缓冲层205设置在第一光学胶层206和第二光学胶层204之间。且该缓冲层205的膜层材料设置为多孔的材料，如该缓冲层205设置为具有密集的蜂窝孔结构膜层。
如图5所示，图5为本申请实施例中提供的缓冲层的内部结构示意图。该缓冲层205内部包括多个蜂窝孔501。图5中的多个蜂窝孔501的截面均设置为六边形结构。其中，该蜂窝孔501的截面形状还可设置为其他结构，这里不再详细赘述。
本申请实施例中，该蜂窝孔501可设置为开孔蜂窝孔以及闭孔蜂窝中的任意一种。其中，当设置为开孔蜂窝时，相邻的各个开孔蜂窝之间可相互连接并形成上述致密的孔洞结构，该开孔蜂窝可形成一定的气体流通通道，进而增加该膜层内部的疏密性能。
而当该缓冲层内部设置为闭孔蜂窝，此时，相邻的两个闭孔蜂窝之间彼此孤立不连接。即相邻的蜂窝孔之间无交集区域。优选的，本申请实施例中，该缓冲层内部的蜂窝孔结构可根据实际需求，设置为开孔、闭孔以及相互混合的结构中的任意一种。因此，具体的蜂窝孔可根据实际产品进行设定，这里不作具体限定。
进一步的，本申请实施例中，该缓冲层不同区域处的该蜂窝孔的密度可均设置为相同。且在设置该蜂窝孔501时，该缓冲层内的各蜂窝孔501的大小以及形状可设置为相同或者不同。当均设置为相同结构时，该缓冲层具有较好的对称性，从而提高缓冲层的缓冲效果。
优选的，本申请实施例中，在设置上述缓冲层205以及盖板21时，该缓冲层205的厚度有与该盖板的厚度之间的比值可在1倍-3倍之间，优选的，该缓冲层205与该盖板21厚度之间的比值为2， 或者根据实际产品的弯折半径来进行设定。同时，为了进一步提高该缓冲层205的作用效果，本申请实施例中，该缓冲层205与该盖板之间的距离小于150um，优选的，该缓冲层与该盖板之间的距离设置为50um，从而保证其缓冲效果。
具体的，本申请实施例中，该缓冲层205的材料可选取为热塑性聚氨酯弹性体材料，或者热塑性聚氨酯弹性体橡胶。在进行制备时，可通过发泡工艺，在上述材料中添加发泡剂，并制备得到本申请实施例中的热塑性聚氨酯弹性体橡胶材料，并将该材料设置在该显示模组内。
本申请实施例中，该缓冲层205具有较好的弹性性能。其中，该缓冲层205的弹性模量优选为1Mpa-1Gpa，且缓冲层205的断裂拉伸率大于等于200％。本申请实施例中，当触控笔在对该柔性显示装置进行触控时，在较大触控力作用时，各膜层会发生凹陷，如超薄玻璃层发生凹陷，由于该超薄玻璃层的硬度较高，若不能对其进行缓冲，其会发生断裂，甚至对下层的偏光片203造成影响，进而降低显示装置的可靠性及质量。
因此，本申请实施例中，通过设置该缓冲层205，能有效的缓冲各膜层之间的应力作用，从而对超薄玻璃层与偏光片203进行保护。
进一步的，如下表1所示。其中，表1为本申请实施例提供的不同膜层下对应的显示装置的各项实验性能数据。
表1：显示装置的各项实验性能数据
  落笔/cm 落球/cm 划痕/条 硬度/H 弯曲力/N
方案1 2-3 ＜2 4-6 3-4 15
方案2 9-10 4-5 1 5-9 ＜10
方案1和方案2为对比实验组。其中，上述各实验组中，方案1为采用现有技术中制备得到的柔性显示装置，方案2中为采用本申请实施例中制备得到的柔性显示装置。两者的区别在于，方案1中的盖板采用常规的盖板层，而在方案2中盖板采用本申请实施例提供的盖 板，如超薄玻璃。同时，方案1中不设置本申请实施例中的热塑性聚氨酯弹性体橡胶缓冲层，其他各膜层以及结构均相同。
由上表中的实验数据可知，现有技术中得到的柔性显示装置的落笔和落球实验得到的数据，均小于本申请实施例中提供的柔性显示装置得到的落笔和落球实验数据。且当采用相同的力，使用触控笔在该装置表面进行滑动时，方案1中的表层会出现4-6条划痕，而在方案2中，其仅产生1条划痕，且该划痕的深度小于方案1中的划痕深度。
且当将方案1和方案2中的柔性装置均弯曲到相同的半径时，如弯曲半径为1.5mm时，方案2中所需要的弯曲力小于10N即可实现，而对比实验组中所需要的弯曲力较大。因此，本申请实施例中提供的柔性显示装置在防划和弯曲性能均优于现有技术中的柔性装置。
进一步的，如图6所示，图6为本申请实施例提供的另一柔性显示装置的膜层结构示意图。结合图2中的膜层结构，本申请实施例中，采用去偏光片工艺进行制备。本申请实施例中，该显示模组内省去偏光片膜层，同时，该柔性显示装置中设置的发光层242的膜层结构与图2中设置的发光层的结构不同，其余膜层结构可参照图2中的结构进行设置，并最终形成本申请实施例中的柔性显示装置。
本申请实施例中，省去偏光片203能进一步的降低该装置的厚度，从而有效的提高了该装置的弯曲性能。
进一步的，该柔性显示装置还包括第二保护层209，该第二保护层209设置在该柔性显示装置的最外侧，即第二保护层209为显示装置的表面膜层。使用者可根据个人喜好随之将该第二保护层209撕去或者贴合。
本申请实施例中，该第二保护层209主要为柔性膜层材料，如聚对苯二甲二乙酯、聚酰亚胺或者其他高分子柔性膜层。
进一步的，本申请实施例中提供的柔性显示装置还包括柔性电路板211以及集成电路213。其中，该柔性电路板211和该集成电路213均设置在显示模组的一侧，如均设置在该发光层212的一侧位置处，并与该发光层212延伸的部分膜层相贴合，从而通过柔性电路板211 以向该发光层提供控制信号。进一步的，该柔性显示装置还包括第二背板210。该第二背板210设置在该发光层212的一侧，且该第二背板210与柔性电路板211分别设置在该发光层212的两侧，从而使得该第二背板210较好的对发光层进行支撑，进一步提高该柔性显示装置的可靠性及综合性能。
优选的，本申请实施例中，该第一支撑背板202可设置为轻质材料，如易于弯曲的碳纤维材料。优选的，该第一支撑背板202设置为聚丙烯腈基碳纤维、聚氨醋树脂碳基纤维，聚酰亚胺等材料。且该第一支撑背板202的厚度设置为小于90um，以在保证显示装置性能的情况下，实现轻薄化设置。
优选的，还可将该第一支撑背板202设置为镂空结构，如该第一支撑背板202在其弯曲区域内设置为多个镂空条结构。多个镂空条依次交替的设置在第一支撑背板202上。本申请实施例中，通过在第一支撑背板202上设置多个镂空条，当进行弯曲时，镂空条能有效的降低背板的弯曲应力，进而提高柔性显示装置的弯曲性能。同时，镂空条能进一步降低该背板的重量，进而实现柔性显示装置的轻薄化设计。
优选的，如图7所示，图7为本申请实施例中提供的柔性显示装置折叠后的结构示意图。该柔性显示装置70折叠后，其体积以及展开面积缩小至原来的一半，且在该弯折区域400处，具有更小的弯曲半径。本申请实施例中，该弯曲半径小于1.5mm，从而实现超小弯曲半径。同时，当将该柔性显示装置展开，并使用触控笔在其表面进行滑动时，不会在其表面膜层上形成划痕，从而有效的提高该柔性显示装置的质量及综合性能。
进一步的，本发明实施例中，该显示模组及显示装置可应用于手机、电脑、笔记本电脑、数码相框等任何具有柔性弯曲或者折叠功能的产品或部件，其具体类型不做具体限制。
综上所述，以上对本发明实施例所提供的一种显示模组及显示装置进行了详细介绍，本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的技术方 案及其核心思想；虽然本发明以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为基准。

Claims (20)

  1. 一种显示模组，包括：
    衬底；
    发光层，设置在所述衬底的一侧；
    盖板，设置在所述发光层远离所述衬底的一侧，所述盖板包括：依次设置在所述发光层远离所述衬底一侧的保护层和硬质层，所述硬质层的表面硬度大于所述保护层的表面硬度，所述保护层的厚度小于等于50um；
    其中，所述硬质层包括多个填充区域以及设置在所述填充区域一侧的非填充区域；
    所述填充区域内设置有强化层，所述强化层的表面硬度比非填充区域内的硬质层的硬度大0.6H-1.2H。
  2. 根据权利要求1所述的显示模组，其中所述硬质层的厚度与所述保护层厚度的比值范围为0.05-0.15。
  3. 根据权利要求2所述的显示模组，其中所述硬质层的表面硬度范围为5H-9H，所述保护层的表面硬度范围为3H-5H。
  4. 根据权利要求3所述的显示模组，其中所述硬质层包含有机与无机杂化的复合材料，所述保护层包括超薄玻璃。
  5. 根据权利要求1所述的显示模组，其中所述显示模组还包括缓冲层，所述缓冲层设置在所述发光层与所述盖板之间。
  6. 一种显示模组，包括：
    衬底；
    发光层，设置在所述衬底的一侧；
    盖板，设置在所述发光层远离所述衬底的一侧，所述盖板包括：依次设置在所述发光层远离所述衬底一侧的保护层和硬质层，所述硬质层的表面硬度大于所述保护层的表面硬度，所述保护层的厚度小于等于50um。
  7. 根据权利要求6所述的显示模组，其中所述硬质层的厚度与 所述保护层厚度的比值范围为0.05-0.15。
  8. 根据权利要求7所述的显示模组，其中所述硬质层的表面硬度范围为5H-9H，所述保护层的表面硬度范围为3H-5H。
  9. 根据权利要求8所述的显示模组，其中所述硬质层包含有机与无机杂化的复合材料，所述保护层包括超薄玻璃。
  10. 根据权利要求6所述的显示模组，其中所述显示模组还包括缓冲层，所述缓冲层设置在所述发光层与所述盖板之间。
  11. 根据权利要求10所述的显示模组，其中所述缓冲层的弹性模量范围为1Mpa-1Gpa，所述缓冲层的断裂拉伸率大于或等于200％。
  12. 根据权利要求11所述的显示模组，其中所述缓冲层的内部包括蜂窝孔结构。
  13. 根据权利要求10所述的显示模组，其中所述缓冲层的厚度与所述盖板的厚度之间的比值范围为1-3。
  14. 根据权利要求10所述的显示模组，其中所述缓冲层与所述盖板之间的距离小于150um。
  15. 根据权利要求6所述的显示模组，其中所述硬质层包括多个填充区域以及设置在所述填充区域一侧的非填充区域；
    其中，所述填充区域内设置有强化层，所述强化层的表面硬度大于所述非填充区域内的所述硬质层的表面硬度。
  16. 根据权利要求15所述的显示模组，其中所述填充区域间隔的设置在所述硬质层上，且所述硬质层边缘区域对应的所述填充区域的分布密度，大于所述硬质层中心区域处对应的所述填充区域的分布密度。
  17. 根据权利要求6所述的显示模组，其中所述硬质层包括第一硬质层、柔性层以及第二硬质层，所述第一硬质层设置在所述保护层上，所述柔性层设置在上第一硬质层上，所述第二硬质层设置在所述柔性层上；
    其中，所述第一硬质层的表面硬度大于所述第二硬质层的表面硬度。
  18. 根据权利要求17所述的显示模组，其中所述第二硬质层设置为网格状镂空结构。
  19. 根据权利要求17所述的显示模组，其中所述第二硬质层靠近所述第一硬质层的一侧的表面上设置有微凸起。
  20. 一种显示装置，包括显示模组，所述显示模组包括：
    衬底；
    发光层，设置在所述衬底的一侧；
    盖板，设置在所述发光层远离所述衬底的一侧，所述盖板包括：依次设置在所述发光层远离所述衬底一侧的保护层和硬质层，所述硬质层的表面硬度大于所述保护层的表面硬度，所述保护层的厚度小于等于50um。
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