WO2023246713A1 - 一种柔性盖板、显示模组及显示装置 - Google Patents
一种柔性盖板、显示模组及显示装置 Download PDFInfo
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- WO2023246713A1 WO2023246713A1 PCT/CN2023/101139 CN2023101139W WO2023246713A1 WO 2023246713 A1 WO2023246713 A1 WO 2023246713A1 CN 2023101139 W CN2023101139 W CN 2023101139W WO 2023246713 A1 WO2023246713 A1 WO 2023246713A1
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- Prior art keywords
- layer
- cover
- cover layer
- bending area
- thickness
- Prior art date
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- 238000005452 bending Methods 0.000 claims description 107
- 239000000463 material Substances 0.000 claims description 32
- 238000005530 etching Methods 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 15
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- 239000004831 Hot glue Substances 0.000 claims description 11
- 239000010410 layer Substances 0.000 description 369
- 238000010586 diagram Methods 0.000 description 21
- 239000002131 composite material Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 238000001723 curing Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
-
- 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
- G09F9/335—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 being organic light emitting diodes [OLED]
Definitions
- Embodiments of the present application relate to the technical field of display devices, specifically, to a flexible cover, a display module and a display device.
- foldable products often use flexible folding cover combinations such as CPI, PET or UTG to achieve bendability.
- Thin flexible cover designs are often not conducive to improving the impact resistance of the product.
- the mechanical properties of the product are often sacrificed. Therefore, compared with straight mobile phones, the mechanical properties of foldable products, especially the ball-dropping and pen-dropping performance, are not as good.
- Embodiments of the present application provide a flexible cover, a display module and a display device, aiming to improve the impact resistance and surface hardness of the flexible cover while also ensuring the folding performance of the flexible cover.
- the first aspect of the embodiment of the present application provides a flexible cover plate, including at least one layer of cover plate structure, wherein,
- the cover structure includes:
- the second cover layer being located on at least one surface of the first cover layer
- the second cover layer is directly attached to the first cover layer, and the elastic modulus of the second cover layer is substantially the same as the elastic modulus of the first cover layer.
- the first cover layer includes opposing first and second surfaces
- the second cover layer is located on one of the first surface and the second surface.
- the flexible cover plate includes a bending area and a non-bending area provided on at least one side of the bending area;
- the thickness of the second cover layer in the bending area is less than or equal to the thickness of the second cover layer in the non-bending area.
- the thickness of the fold area is less than or equal to the thickness of the second cover layer in the non-bending area.
- the orthographic projection of the second cover layer on the first cover layer does not overlap with the bending area.
- the bending area includes two first sides and a centerline located between the two first sides, and the two first sides are symmetrically arranged on both sides of the centerline. , the non-bending area is connected to the first side;
- the thickness of the second cover layer on the first side is greater than the thickness of the second cover layer on the center line side.
- the second cover layer includes a plurality of sub-regions between the first side and the center line, the second cover layer has different thicknesses in different sub-regions, and the second cover layer has The thickness of the second cover plate layer is smaller in the sub-region closer to the center line;
- the second cover layer has the same thickness in the same sub-region.
- the thickness of the second cover layer gradually decreases from the first side to the center line.
- the thickness of the second cover layer in the non-bending area is smaller than the thickness of the second cover layer in the non-bending area
- the thickness of the second cover layer in the non-bending area is The bending area includes a recessed area
- the flexible cover also includes:
- a leveling layer is located on a side of the second cover layer facing away from the first cover layer, and the leveling layer fills the recessed area.
- the second cover layer includes a third cover layer located on the first surface of the first cover layer and a fourth cover layer located on the second surface of the first cover layer;
- the thickness of the third cover layer in the bending area is equal to the thickness of the third cover layer in the non-bending area
- the thickness of the fourth cover layer in the bending area is smaller than the thickness of the fourth cover layer in the non-bending area.
- the thickness of the second cover layer is greater than or equal to 5 ⁇ m and less than or equal to 300 ⁇ m.
- the material of the first cover layer includes at least one of the following: PET, CPI and UTG.
- the elastic modulus of the second cover layer is greater than or equal to 1 GPa and less than or equal to 100 GPa.
- the material of the second cover layer is hot melt glue.
- the at least one layer of cover structure includes a first cover structure and a second cover structure that are stacked;
- a connecting glue layer is provided between the first cover plate structure and the second cover plate structure.
- a second aspect of the embodiment of the present application provides a display module, including a support layer, a display panel disposed on the support layer, and a flexible cover provided on the display panel as provided in the first aspect of the embodiment of the present application. plate.
- the display module includes a bending area and a non-bending area provided on at least one side of the bending area;
- An etching groove is provided on one side of the support layer close to the display panel, and the orthographic projection of the etching groove on the flexible cover plate is located within the bending area;
- a filling layer is provided between the support layer and the panel layer, and the filling layer at least partially fills the etching groove.
- the etching groove is disposed partially or completely through the support layer.
- a third aspect of the embodiment of the present application provides a display device, including the flexible cover provided by the first aspect of the embodiment of the present application, or a display module provided by the second aspect of the embodiment of the present application.
- the present application provides a flexible cover, a display module and a display device.
- the second cover layer is located between the first cover layer and the first cover layer.
- At least one surface, and the second cover layer is directly attached to the first cover layer, and the second cover layer can be bent following the first cover layer, using the first cover layer and the second cover layer.
- the formed flexible cover plate with a composite structure can improve the impact resistance and surface hardness of the flexible cover plate, and at the same time ensure the folding performance of the flexible cover plate.
- Figure 1 is a schematic structural diagram of a flexible cover plate proposed in an embodiment of the present application.
- Figure 2 is a schematic structural diagram of a flexible cover plate with a second cover plate layer on the other surface of the first cover plate layer proposed by an embodiment of the present application;
- Figure 3 is a schematic structural diagram of a flexible cover plate with a second cover plate layer on both surfaces of the first cover plate layer proposed by an embodiment of the present application;
- Figure 4 is a schematic structural diagram of a flexible cover plate without a second cover plate layer in the bending area proposed by an embodiment of the present application;
- Figure 5 is a schematic structural diagram of a flexible cover plate with a second cover plate layer on the other surface of the first cover plate layer and no second cover plate layer in the bending area proposed by an embodiment of the present application;
- Figure 6 is a schematic structural diagram of a flexible cover plate with a second cover plate layer on both surfaces of the first cover plate layer and no second cover plate layer in the bending area proposed by an embodiment of the present application;
- Figure 7 is a schematic structural diagram of a flexible cover plate with a second cover plate layer whose thickness gradually decreases in the bending area proposed by an embodiment of the present application;
- Figure 8 is a schematic structural diagram of a flexible cover plate with a second cover plate layer on the other surface of the first cover plate layer and a second cover plate layer whose thickness gradually decreases in the bending area proposed by an embodiment of the present application;
- Figure 9 is a schematic structural diagram of a flexible cover plate in which the second cover plate layer is on both surfaces of the first cover plate layer and the thickness of the second cover plate layer gradually decreases in the bending area proposed by an embodiment of the present application;
- Figure 10 is a schematic structural diagram of a flexible cover plate with a second cover plate layer whose thickness gradient is reduced in the bending area proposed by an embodiment of the present application;
- Figure 11 shows a second cover layer proposed by an embodiment of the present application on the other surface of the first cover layer and Structural diagram of the flexible cover plate of the second cover plate layer with reduced thickness gradient in the bending zone;
- Figure 12 is a schematic structural diagram of a flexible cover plate in which the second cover plate layer is on both surfaces of the first cover plate layer and the thickness gradient of the second cover plate layer is reduced in the bending area proposed by an embodiment of the present application;
- Figure 13 is a schematic structural diagram of a flexible cover plate in which the third cover layer has an equal-thickness structure and the fourth cover layer has an unequal-thickness structure proposed by an embodiment of the present application;
- Figure 14 is a schematic structural diagram of a flexible cover plate provided with a filling layer on the second cover plate layer according to an embodiment of the present application;
- Figure 15 is a schematic structural diagram of a flexible cover plate including a first cover plate structure and a second cover plate structure proposed by an embodiment of the present application;
- Figure 16 is a schematic structural diagram of a display module proposed by an embodiment of the present application.
- Figure 17 is a schematic structural diagram of another display module proposed by an embodiment of the present application.
- Figure 18 is a schematic structural diagram of a support layer with etched grooves proposed by an embodiment of the present application.
- Figure 19 is a schematic structural diagram of a support layer for filling etching grooves with a filling layer proposed by an embodiment of the present application;
- Figure 20 is a schematic structural diagram of a filling layer partially filling an etching groove, and the etching groove penetrating the support layer proposed by an embodiment of the present application;
- FIG. 21 is a schematic structural diagram of a filling layer that completely fills the etching grooves and the etching grooves penetrate the support layer according to an embodiment of the present application.
- Cover plate structure 101. First cover plate layer; 102. Second cover plate layer; 1021. Third cover plate layer; 1022. Fourth cover plate layer; 103. Filling layer; 104 , first cover plate structure; 105, second cover plate structure; 20, support layer; 201, etching groove; 30, display panel; 40, buffer layer; 50, connecting glue layer; 60, filling layer; 701, First connection layer; 702, second connection layer; 703, third connection layer; A, bending area; B, non-bending area; C, recessed area.
- UTG ultra-thin glass
- UTG Ultra-Thin Glass
- the current solution is to achieve UTG by reducing the thickness of UTG. Therefore, using a simple UTG solution, the mechanical strength of the display module is still weak, and the UTG is thin, so there is a greater risk of fragmentation during use. In addition, the production process of UTG is more complicated and the cost is higher.
- the present application provides a flexible cover, a display module and a display device.
- the second cover layer is located on the first at least one surface of the cover layer, and the second cover layer is directly attached to the first cover layer, and the second cover layer can follow
- the flexible cover with a composite structure formed by the first cover layer and the second cover layer can improve the impact resistance and surface hardness of the flexible cover, while also ensuring that the flexible cover The folding performance of the board.
- the flexible cover plate includes at least one layer of cover plate structure 10 .
- the flexible cover may include a one-layer cover structure 10, a two-layer cover structure 10, a three-layer cover structure 10, and so on.
- the multi-layer cover plate structures 10 are stacked.
- the first layer cover plate structure is at the top
- the second layer cover plate structure is at the top of the first layer cover plate structure.
- the third cover structure is below the second cover structure.
- the cover structure 10 includes a first cover layer 101 and a second cover layer 102 disposed on the first cover layer 101 .
- the first cover layer 101 has two opposite surfaces, and the second cover layer 102 is located on at least one surface of the first cover layer 101 .
- the first cover layer 101 includes a first surface and a second surface.
- the second cover layer 102 may be located on the first surface of the first cover layer 101 or may be located on the first surface of the first cover layer 101 .
- the second cover layer 102 can also be provided on both the first surface and the second surface of the first cover layer 101 .
- the first cover layer 101 may have a single-layer structure or a multi-layer structure.
- the material of the first cover layer 101 may be CPI (transparent polyimide), PET (polyethylene terephthalate) or UTG.
- the material of each layer of the first cover layer 101 can be CPI, PET or UTG respectively; for example, the first cover 101 can be a layer of CPI material and a layer of PET.
- the composite structure formed by the material can also be a composite structure formed by a layer of PET material and a layer of UTG material, or a composite structure formed by a layer of CPI material and a layer of UTG material, or it can be a layer of CPI material and a layer of UTG material.
- the thickness of the first cover layer 101 is greater than or equal to 10 ⁇ m and less than or equal to 100 ⁇ m.
- the thickness of the first cover layer 101 may be 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 25 ⁇ m, 30 ⁇ m, 50 ⁇ m, 100 ⁇ m, etc.
- the second cover layer 102 is made of a material with certain foldability and viscosity, so that the second cover layer 102 can be directly attached to the first cover layer 101, and the second cover layer 102 can follow the first cover. Layer 101 is folded.
- the direct bonding means that there is no other layer between the first cover layer 101 and the second cover layer 102 .
- the cover structure 10 formed has high toughness and hardness.
- the second cover layer 102 may be made of a material that is in a molten state at a certain temperature (for example, 100°C) and is in a solidified state at normal temperature (for example, 25°C).
- the temperature of the material of the second cover layer 102 is heated to 100°C, so that the second cover layer 102 can be directly bonded to the first cover layer 101 without the need for other connecting materials, thereby making the flexible cover
- the preparation process of the board is simpler; and at normal temperature, the second cover layer 102 will solidify, thus not affecting the normal use of the flexible cover.
- the second cover layer 102 and the first cover layer 101 need to have a certain bonding strength, that is, the bonding strength between the two.
- the second cover layer 102 The bonding strength between 102 and the first cover layer 101 may be 1-30N/15mm.
- the elastic modulus of the second cover layer 102 is greater than or equal to 1 GPa and less than or equal to 100 GPa.
- the elastic modulus of the second cover layer 102 may be 1 GPa, 10 GPa, 20 GPa, 30 GPa, 40 GPa, 50 GPa, 100 GPa, or the like.
- the elastic modulus of the first cover layer 101 needs to be substantially the same as the elastic modulus of the second cover layer 102. In this way, when the cover structure 10 is bent, the second cover layer 102 and the first cover layer Layer 101 can bend together better.
- the elastic modulus of the first cover layer 101 and the elastic modulus of the second cover layer 102 are substantially the same refers to the elastic modulus of the first cover layer 101 and the elastic modulus of the second cover layer 102 .
- the absolute value of the difference is less than or equal to 10% of the first elastic modulus.
- the folding recoverability of the second cover layer 102 after curing needs to be maintained at 70%-100%, so as to satisfy the foldability of the flexible cover.
- the flexible cover includes a folded state and an unfolded state.
- the second cover layer 102 is arranged axially symmetrically with respect to the first cover layer 101 on the first cover layer 101, and any flexible cover provided by the embodiment of the present application satisfies this arrangement. .
- the cover structure 10 formed by the two has strong impact resistance and surface hardness, and The folding performance of the cover structure 10 can also be ensured.
- embodiments of the present application provide a flexible cover, in which the material of the second cover layer is hot melt adhesive.
- hot melt adhesive is selected for the second cover layer 102 .
- the hot melt adhesive material has a certain foldability, and the hot melt adhesive has high stiffness, strong impact resistance and high elasticity after thermal curing. modulus, and has the properties of fatigue resistance and low creep. Therefore, after the second cover layer 102 of hot melt adhesive material is compounded with the first cover layer 101, the cover structure 10 formed by the two has stronger Impact resistance and surface hardness, and the hot melt adhesive material can also meet the folding requirements of small radii such as R0.5 or R1, thus not affecting the folding performance of the cover structure 10 .
- the curing parameters of the second cover layer 102 that is, the curing temperature is 50°C-150°C, and the curing time is 5min-200min.
- the elastic modulus of layer 102 after curing is between 1 GPa and 70 GPa.
- the flexible cover plate includes a bending area A and a non-bending area B disposed on at least one side of the bending area A, and the second cover layer 102 is bent
- the thickness of region A is smaller than the thickness of the second cover layer 102 in the non-bending region B.
- the thickness of the second cover layer 102 may be greater than or equal to 5 ⁇ m and less than or equal to 300 ⁇ m.
- the thickness of the second cover layer 102 may be 5 ⁇ m, 10 ⁇ m, 15 ⁇ m, 20 ⁇ m, 25 ⁇ m, 50 ⁇ m, 100 ⁇ m, 150 ⁇ m, 200 ⁇ m, 250 ⁇ m, 300 ⁇ m, etc., which can be determined by those skilled in the art according to requirements during specific applications.
- the thickness of the second cover layer 102 is not specifically limited in the embodiment of this application.
- the second cover layer 102 on the first cover layer 101 may have an equal thickness structure or may have an unequal thickness structure. That is to say, as shown in FIG. 1 , the thickness of the second cover layer 102 in the bending area A may be equal to the thickness of the second cover layer 102 in the non-bending area B. At this time, the second cover layer 102 is in first cover layer 101 has an equal thickness structure; at the same time, as shown in Figure 4, the thickness of the second cover layer 102 in the bending area A can also be smaller than the thickness of the second cover layer 102 in the non-bending area B. In this case, the second cover layer 102 has an equal thickness structure. The cover layer 102 has an unequal thickness structure on the first cover layer 101, and when the second cover layer 102 has an unequal thickness structure, the cover structure 10 itself has better folding performance.
- the second cover layers 102 on both surfaces of the first cover layer 101 can all have the same thickness structure, They may all have unequal thickness structures, or the second cover layer 102 on one surface of the first cover layer 101 may have an equal thickness structure, and the second cover layer 102 on the other surface of the first cover layer 101 may have unequal thickness structures. Thick structure.
- embodiments of the present application will introduce various structures in which the thickness of the second cover layer 102 in the bending area A is smaller than the thickness of the second cover layer 102 in the non-bending area B.
- the present application also provides a flexible cover.
- this flexible cover as shown in FIG. 4 , the second cover layer 102 is not provided in the bending area A.
- the orthographic projection of the second cover layer 102 on the first cover layer 101 does not overlap with the bending area A. That is to say, on the plane of the first cover layer 101, the second cover layer 102 will be broken in the bending area A.
- the thickness of the second cover layer 102 in the bending area A is 0, therefore it can be understood that the thickness of the second cover layer 102 in the bending area A is smaller than the thickness of the second cover layer 102 in the non-bending area B.
- the second cover layer 102 when the second cover layer 102 is distributed on the other surface of the first cover layer 101 , or on both surfaces of the first cover layer 101 , it can also be The second cover layer 102 is not provided in the bending area A.
- the second cover layer 102 can be made into a stepped design, and a protective film can be used to protect the second cover layer 102, and then the second cover layer 102 and the first cover can be combined.
- layer 101 it is only necessary to use a laminating jig to bond the second cover layer 102 to the first cover layer 101, and make the position where there is a step difference in the second cover layer 102 correspond to the bending area A, and then align
- the second cover layer 102 is thermally cured to complete the composite of the first cover layer 101 and the second cover layer 102 .
- the thickness of the second cover layer 102 in the bending area A is set to 0, so that the cover structure 10 formed by the composite of the first cover layer 101 and the second cover layer 102 It has better folding performance, and after the second cover layer 102 and the first cover layer 101 are combined, the impact resistance and surface hardness of the flexible cover are improved, and the folding performance of the flexible cover is also ensured.
- the embodiment of the present application provides a flexible cover.
- the bending area A includes two first sides (not shown in the figure). (out) and the centerline (not shown in the figure) located on the two first sides, the two first sides are symmetrically arranged on both sides of the centerline, and the non-bending area B is connected to the first sides.
- both sides of the bending area A are non-bending areas B, so the two first sides are connected to the two non-bending areas B respectively. Therefore, the first side It can be understood as the boundary line between the bending area A and the non-bending area B, and the center line can be understood as the center line of the first cover layer 101 .
- the thickness of the second cover layer 102 close to the first side is greater than the thickness of the second cover layer 102 close to the center line.
- the thickness of the second cover plate layer 102 in the bending area A is not 0, but the thickness of the second cover plate layer 102 in the bending area A is not the same, but It decreases from the first side toward the centerline.
- the thickness of the second cover layer 102 in the bending area A may gradually decrease from the first side toward the center line. At this time, the second cover layer 102 is in the bending area A.
- the thickness is gradient.
- the second cover layer 102 can be formed on the first cover layer 101 through a mold, and the thickness gradient of the second cover layer 102 in the bending area A is realized through the mold, and then cooled to achieve the first cover layer.
- the composite of the plate layer 101 and the second cover layer 102 is
- the second cover layer 102 when the second cover layer 102 is distributed on the other surface of the first cover layer 101 , or is distributed on both surfaces of the first cover layer 101 , it can also be The thickness of the second cover layer 102 in the bending area A may gradually decrease from the first side toward the center line.
- cover structure 10 it should be noted that during the preparation process of the cover plate structure 10, there will be glue overflow areas on both sides of the second cover plate layer 102. Therefore, after cooling, the glue overflow area needs to be cut off with a laser to form the final structure. cover structure 10.
- the thickness of the second cover layer 102 in the bending area A may not be gradient.
- the second cover layer 102 includes multiple sub-regions from the first side to the center line. The thickness of each sub-region is different, and the closer the sub-region is to the center line, the smaller its thickness is. However, the thickness of the second cover layer 102 located in the same sub-region is the same.
- the second cover layer 102 when the second cover layer 102 is distributed on the other surface of the first cover layer 101 , or is distributed on both surfaces of the first cover layer 101 , it can also be The thickness of the second cover layer 102 in the bending area A does not need to be gradual.
- the second cover layer 102 includes five sub-regions from the first side to the center line, where the first sub-region is closest to the first side and the fifth sub-region is closest to the center line. of.
- the thickness of the first sub-region is 100 ⁇ m
- the thickness of the second sub-region is 90 ⁇ m
- the thickness of the third sub-region is 80 ⁇ m
- the thickness of the fourth sub-region is 70 ⁇ m
- the thickness of the fifth sub-region is 60 ⁇ m.
- a structure can also be formed in which the thickness of the second cover layer 102 in the bending area A decreases from the first side to the center line.
- the thickness of the second cover layer 102 in the bending area A is reduced from the first side to the center line, so that the flexible cover has better folding performance, and the second The cover layer 102 is distributed in the bending area A, which also makes the flexible cover have a certain impact resistance and surface hardness in the bending area A, further improving the use effect of the flexible cover.
- the embodiment of the present application also provides a flexible cover.
- the flexible cover the second cover layer 102 is located on the first surface and the opposite surface of the first cover layer 101 at the same time.
- the second cover layer 102 located on the first surface is the third cover layer 1021
- the second cover layer 102 located on the second surface is the fourth cover layer 1022 .
- the thickness of the third cover layer 1021 in the bending area A is equal to the thickness of the third cover layer 1021 in the non-bending area B
- the thickness of the fourth cover layer 1022 in the bending area A is equal to the thickness of the third cover layer 1021 in the non-bending area B.
- the thickness is smaller than the thickness of the fourth cover layer 1022 in the non-bending region B. That is to say, in this flexible cover, on the first cover layer 101
- the second cover layer 102 is provided on both surfaces, and the third cover layer 1021 of the second cover layer 102 has an equal thickness structure, and the fourth cover layer 1022 has an unequal thickness structure.
- the unequal thickness structure of the fourth cover layer 1022 may include any of the situations described above.
- the thickness of the fourth cover layer 1022 in the bending area A may be 0, or may decrease from the first side toward the center.
- FIG. 13 only shows the thickness of the fourth cover layer 1022 in the bending area.
- the thickness of A is 0.
- the third cover layer 1021 has an equal thickness structure
- the fourth cover layer 1022 has an unequal thickness structure, so that the foldable cover can have strong impact resistance and surface In addition to its hardness, it also has strong folding performance.
- the embodiment of the present application also provides a flexible cover, in which the flexible cover further includes a filling layer 103 .
- the second cover layer 102 in the bending area A when the thickness of the second cover layer 102 in the bending area A is smaller than the thickness of the second cover layer 102 in the non-bending area B, the second cover layer 102 is in the bending area.
- the folding area A includes a recessed area C, and the filling layer 103 is located on the side of the second cover layer 102 away from the first cover layer 101 , and the filling layer 103 completely fills the recessed area C.
- the shapes of the recessed areas C are also different.
- the shape of the recessed area C is a trapezoid; as shown in Figure 7, the thickness of the second cover layer 102 is from the first side to When the centerline gradually decreases, the shape of the recessed area C is a triangle; as shown in FIG. 10 , when the thickness of the second cover layer 102 gradually decreases from the first side to the centerline, the shape of the recessed area C is a step shape.
- the side of the second cover layer close to the bending area is set as a bevel, so the shape of the recessed area C is trapezoidal. In other embodiments, the bevel may not be provided at this position. At this time, the shape of the recessed area C is a rectangle.
- a filler layer 103 is provided on the side of the second cover layer 102 away from the back plate.
- the filling layer 103 can be made of inorganic materials, such as SiO 2 ; or it can be made of organic materials, such as acrylic or polyimide.
- the embodiment of the present application also provides a flexible cover.
- at least one cover structure 10 includes a stacked first cover.
- the structure 104 and the second cover structure 105 are provided with a connecting glue layer 50 between the first cover structure 104 and the second cover structure 105 .
- the first cover plate structure 104 can be any of the cover plate structures 10 described in the embodiments of the present application
- the second cover plate structure 105 can also be any of the cover plate structures 10 described in the embodiments of the present application. 10.
- a connecting glue layer 50 is provided between the first cover plate structure 104 and the second cover plate structure 105.
- the connecting glue layer 50 can be OCA ( Optically Clear Adhesive optical glue, using the connecting glue layer 50 to make the first cover structure 104 and the second cover structure 105 more tightly connected.
- the connecting glue layer 50 may not be provided between the first cover plate structure 104 and the second cover plate structure 105, and the connection between the two may be realized only through the second cover plate layer 102 of hot melt adhesive material.
- an embodiment of the present application discloses a display module.
- the display module includes a support layer 20 , a display panel 30 provided on the support layer 20 , and a display panel 30 provided on the display panel 30 .
- the support layer 20 provides support capability for the display module
- the material of the support layer 20 may be SUS or carbon fiber.
- a buffer layer 40 may also be provided between the support layer 20 and the display panel 30 .
- the material of the buffer layer 40 may be foam or PET.
- the support layer 20 and the buffer layer 40 are connected through a first connection layer 701
- the buffer layer 40 and the display panel 30 are connected through a second connection layer 702
- the display panel 30 and the cover structure 10 are connected through a third connection layer 703 connect.
- the first connection layer 701, the second connection layer 702 and the third connection layer 703 are all glue materials, such as OCA optical glue.
- the display panel 30 and the flexible cover may not be connected through the third connection layer 703 , but directly through the adhesive second cover layer 102 . connect.
- the display module provided by the embodiment of the present application combines a flexible cover composed of the second cover layer 102 and the first cover layer 101, so that the display module has stronger impact resistance and surface hardness, while also ensuring Improve the folding performance of the display module.
- the embodiment of the present application also provides a display module.
- the display module includes a bending area A and a Non-bent area B on at least one side.
- An etching groove 201 is provided on the side of the support layer 20 close to the display panel 30.
- the orthographic projection of the etching groove 201 on the flexible cover plate is located within the bending area A, and the etching groove 201 partially or completely penetrates A support layer 20 is provided.
- a filling layer 60 is provided between the support layer 20 and the display panel 30 , and the filling layer 60 at least partially fills the etching groove 201 .
- the filling layer 60 can completely fill the etching groove 201 ; as shown in FIG. 20 , if the etching groove 201 completely penetrates support layer 20, the filling layer 60 can partially fill the etching groove 201 that penetrates the supporting layer 20; as shown in FIG. 21, when the etching groove 201 completely penetrates the supporting layer 20, the filling layer 60 can also completely fill it.
- Etching grooves 201 penetrating the support layer 20 those skilled in the art can set them according to actual needs.
- the material of the filling layer 60 can be hot melt glue. Since the hot melt adhesive material has a high elastic modulus, by compounding the filling layer 60 of the hot melt adhesive material with the support layer 20 having the etched grooves 201, the mechanical properties of the entire display module can be improved, and at the same time, Reduce the creases of the display module, making the display module more effective.
- embodiments of the present application also provide a display device, which includes any flexible cover plate described in the embodiments of the present application, or any display module described in the embodiments of the present application.
- the display device may include an OLED (Organic Light-Emitting Diode).
- Photodiode 20 display screen
- mobile devices such as mobile phones, wearable devices such as watches, VR devices, etc.
- wearable devices such as watches, VR devices, etc.
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Abstract
一种柔性盖板、显示模组及显示装置，盖板结构（10）包括：第一盖板层（101）；第二盖板层（102），第二盖板层（102）位于第一盖板层（101）的至少一个表面上；第二盖板层（102）直接贴合在第一盖板层（101）上，且第二盖板层（102）和第一盖板层（101）的弹性模量大致相同。盖板结构（10）提高柔性盖板的抗冲击性和表面硬度的同时，也保证了柔性盖板的折叠性能。
Description
相关申请的交叉引用
本申请要求于2022年6月21日提交中国专利局，申请号为202210706338.3，发明名称为“一种柔性盖板、显示模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本申请实施例涉及显示器件技术领域，具体而言，涉及一种柔性盖板、显示模组及显示装置。
近年来，折叠产品应用越来越广泛，围绕其弯折形态，弯折半径，及抗冲击性提升有极大研究前景。
目前折叠产品往往采用CPI、PET或UTG等柔性折叠盖板组合来实现可弯折性，较薄的柔性盖板设计往往不利于产品的抗冲击性能提升。当前行业内为保证产品优异的折叠性能，如更小折叠半径、更长折叠寿命，其往往会舍弃产品的机械性能。因此与直板手机相比，折叠产品的机械性能，特别是落球落笔性能表现欠佳。
发明内容
本申请实施例在于提供一种柔性盖板、显示模组及显示装置，旨在提高柔性盖板的抗冲击性、表面硬度，同时也保证了柔性盖板的折叠性能。
本申请实施例第一方面提供一种柔性盖板，包括至少一层盖板结构，其中，
所述盖板结构包括：
第一盖板层；以及
第二盖板层，所述第二盖板层位于所述第一盖板层的至少一个表面上；
其中，所述第二盖板层直接贴合在所述第一盖板层上，所述第二盖板层的弹性模量与所述第一盖板层的弹性模量大致相同。
可选地，所述第一盖板层包括相对的第一表面和第二表面；
所述第二盖板层位于所述第一表面和所述第二表面之一上。
可选地，所述柔性盖板包括弯折区和设置于所述弯折区至少一侧的非弯折区；
所述第二盖板层在所述弯折区的厚度小于或等于所述第二盖板层在所述非弯
折区的厚度。
可选地，所述第二盖板层在所述第一盖板层上的正投影与所述弯折区无交叠。
可选地，所述弯折区包括两个第一侧边和位于两个所述第一侧边之间的中心线，两个所述第一侧边对称设置在所述中心线的两侧，所述非弯折区与所述第一侧边相连；
其中，在所述弯折区内，第二盖板层在所述第一侧边侧的厚度大于第二盖板层在所述中心线侧的厚度。
可选地，所述第二盖板层在所述第一侧边到所述中心线之间包括多个子区域，所述第二盖板层在不同子区域的厚度不相同，且所述第二盖板层在越靠近所述中心线的子区域的厚度越小；
其中，所述第二盖板层在同一个子区域内的厚度相同。
可选地，所述第二盖板层的厚度由所述第一侧边到所述中心线逐渐减小。
可选地，在所述第二盖板层在所述弯折区的厚度小于所述第二盖板层在所述非弯折区的厚度的情况下，所述第二盖板层在所述弯折区包括凹陷区域，所述柔性盖板还包括：
填平层，所述填平层位于所述第二盖板层背离所述第一盖板层的一侧，且所述填平层填充所述凹陷区域。
可选地，所述第二盖板层包括位于所述第一盖板层的第一表面的第三盖板层以及位于所述第一盖板层的第二表面的第四盖板层；
其中，所述第三盖板层在所述弯折区的厚度等于所述第三盖板层在所述非弯折区的厚度；
所述第四盖板层在所述弯折区的厚度小于所述第四盖板层在所述非弯折区的厚度。
可选地，所述第二盖板层的厚度为大于或等于5μm，且小于或等于300μm。
可选地，所述第一盖板层的材料至少包括以下之一：PET、CPI和UTG。
可选地，所述第二盖板层的弹性模量为大于或等于1GPa，且小于或等于100GPa。
可选地，所述第二盖板层的材料为热熔胶。
可选地，所述至少一层盖板结构包括层叠设置的第一盖板结构和第二盖板结构；
其中，所述第一盖板结构和所述第二盖板结构之间设置有连接胶层。
本申请实施例第二方面提供一种显示模组，包括支撑层、设置在所述支撑层上的显示面板、以及设置在所述显示面板上的如本申请实施例第一方面提供的柔性盖板。
可选地，所述显示模组包括弯折区和设置于所述弯折区至少一侧的非弯折区；
所述支撑层靠近所述显示面板的一侧设置有刻蚀凹槽，所述刻蚀凹槽在所述柔性盖板上的正投影位于所述弯折区范围内；
所述支撑层与所述面板层之间设置有填充层，所述填充层至少部分填充所述刻蚀凹槽。
可选地，所述刻蚀凹槽部分贯穿或完全贯穿所述支撑层设置。
本申请实施例第三方面提供一种显示装置，包括如本申请实施例第一方面提供的柔性盖板，或者，包括如本申请实施例第二方面提供的显示模组。
本申请提供一种柔性盖板、显示模组和显示装置，通过设置至少一层包含第一盖板层和第二盖板层的盖板结构，第二盖板层位于第一盖板层的至少一个表面，且第二盖板层直接贴合到第一盖板层上，同时第二盖板层可以跟随第一盖板层发生弯折，利用第一盖板层和第二盖板层形成的具有复合结构的柔性盖板，可以提高柔性盖板的抗冲击性和表面硬度，同时也可以保证柔性盖板的折叠性能。
为了更清楚地说明本申请实施例的技术方案，下面将对本申请实施例的描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1是本申请一实施例提出的一种柔性盖板的结构示意图；
图2是本申请一实施例提出的一种第二盖板层在第一盖板层的另一个表面的柔性盖板的结构示意图；
图3是本申请一实施例提出的一种第二盖板层在第一盖板层的两个表面的柔性盖板的结构示意图；
图4是本申请一实施例提出的一种在弯折区不设置第二盖板层的柔性盖板的结构示意图；
图5是本申请一实施例提出的一种第二盖板层在第一盖板层的另一个表面且在弯折区不设置第二盖板层的柔性盖板的结构示意图；
图6是本申请一实施例提出的一种第二盖板层在第一盖板层的两个表面且在弯折区不设置第二盖板层的柔性盖板的结构示意图；
图7是本申请一实施例提出的一种在弯折区厚度逐渐减小的第二盖板层的柔性盖板的结构示意图；
图8是本申请一实施例提出的一种第二盖板层在第一盖板层的另一个表面且在弯折区厚度逐渐减小的第二盖板层的柔性盖板的结构示意图；
图9是本申请一实施例提出的一种第二盖板层在第一盖板层的两个表面且在弯折区厚度逐渐减小的第二盖板层的柔性盖板的结构示意图；
图10是本申请一实施例提出的一种在弯折区厚度梯度减小的第二盖板层的柔性盖板的结构示意图；
图11是本申请一实施例提出的一种第二盖板层在第一盖板层的另一个表面且
在弯折区厚度梯度减小的第二盖板层的柔性盖板的结构示意图；
图12是本申请一实施例提出的一种第二盖板层在第一盖板层的两个表面且在弯折区厚度梯度减小的第二盖板层的柔性盖板的结构示意图；
图13是本申请一实施例提出的一种第三盖板层为等厚结构，第四盖板层为不等厚结构的柔性盖板的结构示意图；
图14是本申请一实施例提出的一种在第二盖板层上设置有填平层的柔性盖板的结构示意图；
图15是本申请一实施例提出的一种包括第一盖板结构和第二盖板结构的柔性盖板的结构示意图；
图16是本申请一实施例提出的一种显示模组的结构示意图；
图17是本申请一实施例提出的另一种显示模组的结构示意图；
图18是本申请一实施例提出的一种具有刻蚀凹槽的支撑层的结构示意图；
图19是本申请一实施例提出的一种填充层填充刻蚀凹槽的支撑层的结构示意图；
图20是本申请一实施例提出的一种填充层部分填充刻蚀凹槽，且刻蚀凹槽贯通支撑层的结构示意图；
图21是本申请一实施例提出的一种填充层完全填充刻蚀凹槽，且刻蚀凹槽贯通支撑层的结构示意图。
附图标记说明：10、盖板结构；101、第一盖板层；102、第二盖板层；1021、第三盖板层；1022、第四盖板层；103、填平层；104、第一盖板结构；105、第二盖板结构；20、支撑层；201、刻蚀凹槽；30、显示面板；40、缓冲层；50、连接胶层；60、填充层；701、第一连接层；702、第二连接层；703、第三连接层；A、弯折区；B、非弯折区；C、凹陷区域。
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，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
相关技术中，在显示模组的盖板结构中引入超薄玻璃(UTG，Ultra-Thin Glass)，可以提升显示模组的机械性能，但是目前采用的方案是通过降低UTG的厚度来实现UTG的弯折，因此，采用单纯UTG的方案，显示模组的机械强度还是较弱，且UTG较薄，在使用过程中碎裂风险较大。另外，UTG的生产工艺较复杂，成本较高。
有鉴于此，本申请提供一种柔性盖板、显示模组和显示装置，通过设置至少一层包含第一盖板层和第二盖板层的盖板结构，第二盖板层位于第一盖板层的至少一个表面，且第二盖板层直接贴合到第一盖板层上，同时第二盖板层可以跟随
第一盖板层发生弯折，利用第一盖板层和第二盖板层形成的具有复合结构的柔性盖板，可以提高柔性盖板的抗冲击性和表面硬度，同时也可以保证柔性盖板的折叠性能。
参照图1所示，为本申请实施例公开的一种柔性盖板，该柔性盖板包括至少一层盖板结构10。示例性地，柔性盖板可以包括一层盖板结构10、两层盖板结构10、三层盖板结构10等等。并且，在柔性盖板包括多层盖板结构10时，多层盖板结构10是层叠设置的，例如，第一层盖板结构在最上方，第二层盖板结构在第一层盖板结构的下方，第三层盖板结构在第二层盖板结构的下方。
具体地，参照图1、图2和图3所示，盖板结构10包括第一盖板层101和设置在第一盖板层101上的第二盖板层102。其中，第一盖板层101具有相对的两个表面，第二盖板层102位于第一盖板层101的至少一个表面。
示例性地，第一盖板层101包括有第一表面和第二表面，第二盖板层102可以位于第一盖板层101的第一表面，也可以位于第一盖板层101的第二表面，也可以在第一盖板层101的第一表面和第二表面均设置第二盖板层102。
第一盖板层101可以为单层结构，也可以为多层结构。在第一盖板层101为单层结构时，第一盖板层101的材料可以为CPI(透明聚酰亚胺)、PET(聚对苯二甲酸乙二醇酯)或UTG。在第一盖板层101为多层结构时，第一盖板层101每层的材料则可以分别选用CPI、PET或UTG；例如，第一盖板101可以为一层CPI材料和一层PET材料形成的复合结构，也可以为一层PET材料和一层UTG材料形成的复合结构，也可以为一层CPI材料和一层UTG材料形成的复合结构，也可以为一层CPI材料，一层PET材料和一层UTG材料形成的复合结构。
第一盖板层101的厚度大于或等于10μm，且小于或等于100μm，示例性地，第一盖板层101的厚度可以为10μm、15μm、20μm、25μm、30μm、50μm、100μm等等。
第二盖板层102选用具有一定可折叠能力和粘性的材料，使得第二盖板层102可以直接贴合到第一盖板层101上，且第二盖板层102可以跟随第一盖板层101发生折叠。所述直接贴合是指第一盖板层101与第二盖板层102之间不存在任何其他层。这样，将第二盖板层102与第一盖板层101复合后，形成的盖板结构10具有较高的韧性和硬度。示例性地，第二盖板层102可以选用在一定温度(例如100℃)时为熔融状态，并且，在常温(例如25℃)时为固化状态的材料。在制备过程中，将第二盖板层102材料的温度加热到100℃，使得第二盖板层102可以直接粘接到第一盖板层101上，无需其他的连接材料，从而使得柔性盖板的制备工艺更加简便；而在常温下，第二盖板层102则会固化，从而不影响到柔性盖板的正常使用。
并且，在固化状态下，第二盖板层102与第一盖板层101之间需要具有一定的接着强度，也即是两者之间的粘结强度，示例性地，第二盖板层102与第一盖板层101之间的接着强度可以为1-30N/15mm。
第二盖板层102的弹性模量大于或等于1GPa，且小于或等于100GPa。示例性地，第二盖板层102的弹性模量可以为1GPa、10GPa、20GPa、30GPa、40GPa、50GPa、100GPa等等。并且，第一盖板层101的弹性模量需要与第二盖板层102的弹性模量大致相同，这样，盖板结构10在发生弯折时，第二盖板层102与第一盖板层101才可以更好地一起发生弯折。特别地，第一盖板层101的弹性模量与第二盖板层102的弹性模量大致相同是指第一盖板层101的弹性模量与第二盖板层102的弹性模量的差值的绝对值小于等于第一弹性模量的10％。
此外，第二盖板层102固化后的折叠回复性需要保持在70％-100％，从而满足柔性盖板的可折叠。
需要说明的是，柔性盖板包括折叠状态和展开状态。其中，在展开状态下，第二盖板层102在第一盖板层101上是关于第一盖板层101轴对称设置的，且本申请实施例提供的任一柔性盖板均满足该设置。
通过本申请实施例公开的柔性盖板，在将第二盖板层102与第一盖板层101复合后，使得两者形成的盖板结构10具有较强的抗冲击性和表面硬度，并且盖板结构10的折叠性能也可以得到保证。
在一种可选的实施方式中，本申请实施例提供一种柔性盖板，在该柔性盖板中，第二盖板层的材料为热熔胶。
第二盖板层102选用热熔胶的原因是：热熔胶材料具有一定的可折叠能力，并且热熔胶在热固化后具有较高的刚度、较强的抗冲击性和较高的弹性模量，并且具有耐疲劳和低蠕变的特性，因此在将热熔胶材料的第二盖板层102与第一盖板层101复合后，两者形成的盖板结构10具有较强的抗冲击性和表面硬度，并且，热熔胶材料还可以满足R0.5或R1等小半径的折叠，因而不会影响到盖板结构10的折叠性能。
具体地，在选用热熔胶作为第二盖板层102的材料时，第二盖板层102的固化参数，即固化温度为50℃-150℃，固化时间为5min-200min，第二盖板层102固化后的弹性模量为1GPa-70GPa。
在一种可选的实施方式中，参照图4所示，柔性盖板包括弯折区A和设置于弯折区A至少一侧的非弯折区B，第二盖板层102在弯折区A的厚度小于第二盖板层102在非弯折区B的厚度。
具体地，第二盖板层102的厚度可以大于或等于5μm，且小于或等于300μm。示例性地，第二盖板层102的厚度可以为5μm、10μm、15μm、20μm、25μm、50μm、100μm、150μm、200μm、250μm、300μm等等，在具体应用时本领域技术人员可以根据需求确定第二盖板层102的厚度，在本申请实施例中不做具体限定。
进一步地，第二盖板层102在第一盖板层101上可以为等厚结构，也可以为不等厚结构。也就是说，参照图1所示，第二盖板层102在弯折区A的厚度可以等于第二盖板层102在非弯折区B的厚度，此时，第二盖板层102在第一盖板层
101上为等厚结构；同时，参照图4所示，第二盖板层102在弯折区A的厚度也可以小于第二盖板层102在非弯折区B的厚度，此时第二盖板层102在第一盖板层101上为不等厚结构，且在第二盖板层102为不等厚结构的情况下，盖板结构10本身具有更好的折叠性能。
同时，在第一盖板层101的两个表面均设置有第二盖板层102的情况下，第一盖板层101两个表面上的第二盖板层102可以均为等厚结构，也可以均为不等厚结构，或者，第一盖板层101一个表面的第二盖板层102为等厚结构，第一盖板层101另一个表面的第二盖板层102为不等厚结构。
下面，本申请实施例将关于第二盖板层102在弯折区A的厚度小于第二盖板层102在非弯折区B的厚度的多种结构进行介绍。
在一种可选的实施方式中，本申请还提供一种柔性盖板，在该柔性盖板中，参照图4所示，在弯折区A内不设置第二盖板层102，此时，第二盖板层102在第一盖板层101上的正投影与弯折区A无交叠。也就是说，在第一盖板层101的平面上，第二盖板层102会在弯折区A内断开，这种情况下，第二盖板层102在弯折区A的厚度为0，因此可以理解为第二盖板层102在弯折区A的厚度小于第二盖板层102在非弯折区B的厚度。
进一步地，参照图5和图6所示，在第二盖板层102分布于第一盖板层101的另一个表面，或者分布于第一盖板层101的两个表面上时，也可以在弯折区A内不设置第二盖板层102。
具体地，该种情况下，可以先将第二盖板层102做成有段差设计，并使用保护膜将第二盖板层102保护起来，在复合第二盖板层102与第一盖板层101时，只需利用贴合冶具将第二盖板层102贴合到第一盖板层101上，并且使第二盖板层102存在段差的位置与弯折区A对应起来，再对第二盖板层102进行热固化，即可完成第一盖板层101与第二盖板层102的复合。
通过本申请实施例提供的柔性盖板，将第二盖板层102在弯折区A的厚度设置为0，使得第一盖板层101与第二盖板层102复合形成的盖板结构10具有更好的折叠性能，并且第二盖板层102和第一盖板层101复合后，提高了柔性盖板的抗冲击性、表面硬度，同时也保证了柔性盖板的折叠性能。
在一种可选的实施方式中，本申请实施例提供一种柔性盖板，在该柔性盖板中，参照图7所示，弯折区A包括两个第一侧边(图中未示出)和位于两个第一侧边的中心线(图中未示出)，两个第一侧边对称设置在中心线的两侧，非弯折区B与第一侧边相连。
具体地，在该柔性盖板中，弯折区A两侧均为非弯折区B，因此两个第一侧边是分别与两个非弯折区B连接的，因此，第一侧边可以理解为弯折区A与非弯折区B的交界线，而中心线则可以理解为第一盖板层101的中心线。
同时，在该柔性盖板中，在弯折区A内，靠近第一侧边的第二盖板层102的厚度大于靠近中心线的第二盖板层102的厚度。也就是说，不同于前文所述的柔
性盖板，在该柔性盖板中，第二盖板层102在弯折区A内的厚度不为0，但是第二盖板层102在弯折区A内的厚度并非是相同的，而是由第一侧边朝向中心线减小的。
示例性地，参照图7所示，第二盖板层102在弯折区A的厚度可以由第一侧边朝向中心线逐渐减小，此时第二盖板层102在弯折区A内的厚度是渐变的。该第二盖板层102可以通过模具形成在第一盖板层101上，并且通过模具实现第二盖板层102在弯折区A内的厚度渐变，再经过冷却，即可实现第一盖板层101与第二盖板层102的复合。
进一步地，参照图8和图9所示，在第二盖板层102分布于第一盖板层101的另一个表面，或者分布于第一盖板层101的两个表面上时，也可以使第二盖板层102在弯折区A的厚度可以由第一侧边朝向中心线逐渐减小。
需要说明的是，在该盖板结构10的制备过程中，第二盖板层102的两侧会存在有溢胶区，因此在冷却后，需要利用激光将溢胶区切除，才可以形成最终的盖板结构10。
示例性地，参照图10所示，第二盖板层102在弯折区A的厚度也可以不是渐变的。此时，第二盖板层102在第一侧边到中心线之间包括多个子区域，每个子区域的厚度是不相同的，并且越靠近中心线的子区域，其厚度也就越小，但是位于同一个子区域内的第二盖板层102的厚度是相同的。
进一步地，参照图11和图12所示，在第二盖板层102分布于第一盖板层101的另一个表面，或者分布于第一盖板层101的两个表面上时，也可以使第二盖板层102在弯折区A的厚度也可以不是渐变的。
举例来说，第二盖板层102在第一侧边到中心线之间包括五个子区域，其中，第一个子区域是最靠近第一侧边的，第五个子区域是最靠近中心线的。第一个子区域的厚度为100μm，第二个子区域的厚度为90μm，第三个子区域的厚度为80μm，第四个子区域的厚度为70μm，第五个子区域的厚度为60μm。这样也可以形成第二盖板层102在弯折区A内的厚度由第一侧边到中心线减小的结构。
通过本申请实施例提供的柔性盖板，使第二盖板层102在弯折区A的厚度由第一侧边到中心线减小，使得柔性盖板具有更好的折叠性能，并且第二盖板层102在弯折区A内有分布，也使得柔性盖板在弯折区A也具有一定的抗冲击能力和表面硬度，进一步提高了柔性盖板的使用效果。
在一种可选的实施方式中，本申请实施例还提供一种柔性盖板，在该柔性盖板中，第二盖板层102同时位于第一盖板层101相对的第一表面和第二表面，位于第一表面的第二盖板层102为第三盖板层1021，位于第二表面的第二盖板层102为第四盖板层1022。
具体地，参照图13所示，第三盖板层1021在弯折区A的厚度等于第三盖板层1021在非弯折区B的厚度，第四盖板层1022在弯折区A的厚度小于第四盖板层1022在非弯折区B的厚度。也就是说，在该柔性盖板中，在第一盖板层101的
两个表面均设置有第二盖板层102，且第二盖板层102中的第三盖板层1021为等厚结构，第四盖板层1022为不等厚结构。其中，第四盖板层1022的不等厚结构可以包括前文所述的任一种情况。例如，第四盖板层1022在弯折区A的厚度可以为0，也可以是由第一侧边朝向中心减小的，图13中仅示出了第四盖板层1022在弯折区A的厚度为0的情况。
通过本申请实施例提供的柔性盖板，使第三盖板层1021为等厚结构，第四盖板层1022为不等厚结构，可以使折叠盖板在具备较强的抗冲击能力和表面硬度的同时，也具备较强的折叠性能。
在一种可选的实施方式中，本申请实施例还提供一种柔性盖板，在该柔性盖板中，柔性盖板还包括填平层103。
具体地，参照图5所示，在第二盖板层102在弯折区A的厚度小于第二盖板层102在非弯折区B的厚度的情况下，第二盖板层102在弯折区A包括凹陷区域C，填平层103则位于第二盖板层102背离第一盖板层101的一侧，且填平层103完全填充该凹陷区域C。
具体地，在第二盖板层102为不同结构时，凹陷区域C的形状也是不同的。如图5所示，在弯折区A不设置第二盖板层102时，凹陷区域C的形状为梯形；如图7所示，在第二盖板层102的厚度由第一侧边到中心线逐渐减小时，凹陷区域C的形状为三角形；如图10所示，在第二盖板层102的厚度由第一侧边到中心线梯度减小时，凹陷区域C的形状为台阶形。需要说明的是，在图5中，第二盖板层靠近弯折区的侧边设置为斜边，因此凹陷区域C的形状呈梯形，在其他实施方式中，也可以在这个位置不设置斜边，此时凹陷区域C的形状则为矩形。
在盖板结构10与其他结构(例如另一层盖板结构10或者显示面板30)连接时，若第二盖板层102本身是包括凹陷区域C的，那么就容易出现连接不紧密的问题，因此，为了使盖板结构10可以更好地与其他结构连接，参照图14所示，在第二盖板层102远离背板的一侧设置了填平层103。其中，填平层103可以选用无机材料，例如SiO2；也可以选用有机材料，例如亚克力或聚酰亚胺。
在一种可选的实施方式中，本申请实施例还提供一种柔性盖板，在该柔性盖板中，参照图15所示，至少一层盖板结构10包括层叠设置的第一盖板结构104和第二盖板结构105，并且第一盖板结构104和第二盖板结构105之间设置有连接胶层50。
具体地，第一盖板结构104可以为本申请实施例前文所述的任一种盖板结构10，第二盖板结构105也可以为本申请实施例前文所述的任一种盖板结构10。为了更好地连接第一盖板结构104和第二盖板结构105，在第一盖板结构104和第二盖板结构105之间设置了连接胶层50，连接胶层50可以选用OCA(Optically Clear Adhesive)光学胶，利用连接胶层50使得第一盖板结构104和第二盖板结构105的连接更为紧密。当然，第一盖板结构104和第二盖板结构105之间也可以不设置连接胶层50，两者之间的连接可以仅通过热熔胶材料的第二盖板层102实现。
基于同一发明构思，本申请实施例公开一种显示模组，参照图16所示，该显示模组包括支撑层20、设置在支撑层20上的显示面板30，以及设置在显示面板30上的本申请实施例所述的任一种柔性盖板。
具体地，支撑层20为显示模组提供支撑能力，支撑层20的材料可以是SUS或碳纤维。在支撑层20与显示面板30之间还可以设置缓冲层40，缓冲层40的材料可以选用泡棉或PET。支撑层20与缓冲层40之间通过第一连接层701连接，缓冲层40与显示面板30之间通过第二连接层702连接，显示面板30与盖板结构10之间通过第三连接层703连接。其中，第一连接层701、第二连接层702和第三连接层703均为胶材，例如OCA光学胶。
此外，参照图17所示，在一种可选的实施方式中，显示面板30与柔性盖板之间也可以不通过第三连接层703连接，并直接通过具有粘性的第二盖板层102连接。
通过本申请实施例提供的显示模组，集合了第二盖板层102与第一盖板层101复合的柔性盖板，使得显示模组具有更强的抗冲击性和表面硬度，同时也保证了显示模组的折叠性能。
在一种可选的实施方式中，本申请实施例还提供一种显示模组，在该显示模组中，参照图18所示，显示模组包括弯折区A和设置于弯折区A至少一侧的非弯折区B。支撑层20靠近显示面板30的一侧设置刻蚀凹槽201，刻蚀凹槽201在柔性盖板上的正投影位于弯折区A的范围内，且刻蚀凹槽201部分贯穿或完全贯穿支撑层20设置。
具体地，在支撑层20与显示面板30之间设置有填充层60，且填充层60至少部分填充刻蚀凹槽201。
示例性地，参照图19所示，若刻蚀凹槽201没有完全贯穿支撑层20，填充层60则可以完全填充刻蚀凹槽201；参照图20所示，若刻蚀凹槽201完全贯穿支撑层20，则填充层60可以部分填充贯穿支撑层20的刻蚀凹槽201；参照图21所示，在刻蚀凹槽201完全贯穿支撑层20的情况下，填充层60也可以完全填充贯穿支撑层20的刻蚀凹槽201；本领域技术人员可以根据实际需求进行设置。
填充层60的材料可以热熔胶。由于热熔胶材料具有较高的弹性模量，因此通过将热熔胶材料的填充层60与具有刻蚀凹槽201的支撑层20复合，可以提高整个显示模组的机械性能，同时还可以减小显示模组的折痕，使得显示模组的使用效果更好。
基于同一发明构思，本申请实施例还提供一种显示装置，该显示装置包括本申请实施例所述的任一种柔性盖板，或者包括本申请实施例所述的任一种显示模组。
具体地，该显示装置可以包括OLED(OrganicLight-Emitting Diode，有机发
光二极管20)显示屏、手机等移动装置、手表等可穿戴设备、VR装置等等，本领域技术人员可根据该显示设备的具体用途进行相应地选择，在此不再赘述。
需要说明的是，本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。
还需要说明的是，在本文中，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，诸如“第一”和“第二”之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序，也不能理解为指示或暗示相对重要性。而且，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
以上对本申请所提供的技术方案进行了详细介绍，本文中应用了具体个例对本申请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申请，本说明书内容不应理解为对本申请的限制。同时，对于本领域的一般技术人员，依据本申请，在具体实施方式及应用范围上均会有不同形式的改变之处，这里无需也无法对所有的实施方式予以穷举，而由此所引伸出的显而易见的变化或变动仍处于本申请的保护范围之中。
Claims (18)
- 一种柔性盖板，包括至少一层盖板结构，其中，所述盖板结构包括：第一盖板层；以及第二盖板层，所述第二盖板层位于所述第一盖板层的至少一个表面上；其中，所述第二盖板层直接贴合在所述第一盖板层上，所述第二盖板层的弹性模量与所述第一盖板层的弹性模量大致相同。
- 根据权利要求1所述的柔性盖板，其中，所述第一盖板层包括相对的第一表面和第二表面；所述第二盖板层位于所述第一表面和所述第二表面至少之一上。
- 根据权利要求2所述的柔性盖板，其中，所述柔性盖板包括弯折区和设置于所述弯折区至少一侧的非弯折区；所述第二盖板层在所述弯折区的厚度小于或等于所述第二盖板层在所述非弯折区的厚度。
- 根据权利要求3所述的柔性盖板，其中，所述第二盖板层在所述第一盖板层上的正投影与所述弯折区无交叠。
- 根据权利要求3所述柔性盖板，其中，所述弯折区包括两个第一侧边和位于两个所述第一侧边之间的中心线，两个所述第一侧边对称设置在所述中心线的两侧，所述非弯折区与所述第一侧边相连；其中，在所述弯折区内，所述第二盖板层在所述第一侧边侧的厚度大于所述第二盖板层在所述中心线侧的厚度。
- 根据权利要求5所述的柔性盖板，其中，所述第二盖板层在所述第一侧边到所述中心线之间包括多个子区域，所述第二盖板层在不同子区域的厚度不相同，且所述第二盖板层在越靠近所述中心线的子区域的厚度越小；其中，所述第二盖板层在同一个子区域内的厚度相同。
- 根据权利要求5所述的柔性盖板，其中，所述第二盖板层的厚度由所述第一侧边到所述中心线逐渐减小。
- 根据权利要求3-7任一项所述的柔性盖板，其中，在所述第二盖板层在所述弯折区的厚度小于所述第二盖板层在所述非弯折区的厚度的情况下，所述第二盖板层在所述弯折区包括凹陷区域，所述柔性盖板还包括：填平层，所述填平层位于所述第二盖板层背离所述第一盖板层的一侧，且所述填平层填充所述凹陷区域。
- 根据权利要求8所述的柔性盖板，其中，所述第二盖板层包括位于所述第一盖板层的第一表面的第三盖板层以及位于所述第一盖板层的第二表面的第四盖板层；其中，所述第三盖板层在所述弯折区的厚度等于所述第三盖板层在所述非弯折区的厚度；所述第四盖板层在所述弯折区的厚度小于所述第四盖板层在所述非弯折区的厚度。
- 根据权利要求1所述的柔性盖板，其中，所述第二盖板层的厚度为大于或等于5μm，且小于或等于300μm。
- 根据权利要求1所述的柔性盖板，其中，所述第一盖板层的材料至少包括以下之一：PET、CPI和UTG。
- 根据权利要求1所述的柔性盖板，其中，所述第二盖板层的弹性模量为大于或等于1GPa，且小于或等于100GPa。
- 根据权利要求9-12任一项所述的柔性盖板，其中，所述第二盖板层的材料为热熔胶。
- 根据权利要求13所述的柔性盖板，其中，所述至少一层盖板结构包括层叠设置的第一盖板结构和第二盖板结构；其中，所述第一盖板结构和所述第二盖板结构之间设置有连接胶层。
- 一种显示模组，包括：支撑层；设置在所述支撑层上的显示面板；以及设置在所述显示面板上的如权利要求1-14任一项所述的柔性盖板。
- 根据权利要求15所述的显示模组，其中，所述显示模组包括弯折区和设置于所述弯折区至少一侧的非弯折区；所述支撑层靠近所述显示面板的一侧设置有刻蚀凹槽，所述刻蚀凹槽在所述柔性盖板上的正投影位于所述弯折区范围内；所述支撑层与所述显示面板之间设置有填充层，所述填充层至少部分填充所述刻蚀凹槽。
- 根据权利要求16所述的显示模组，其中，所述刻蚀凹槽部分贯穿或完全贯穿所述支撑层设置。
- 一种显示装置，包括：如权利要求1-14任一项所述的柔性盖板；或者如权利要求15-17任一项所述的显示模组。
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| US20170062742A1 (en) * | 2015-08-31 | 2017-03-02 | Samsung Display Co., Ltd. | Flexible display apparatus |
| 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 |
| US20210217975A1 (en) * | 2019-03-07 | 2021-07-15 | Boe Technology Group Co., Ltd. | Support Structure, Manufacturing Method Thereof, and Display Device |
| US20220007530A1 (en) * | 2019-08-30 | 2022-01-06 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Cover plate and flexible display device |
| CN113990206A (zh) * | 2021-11-29 | 2022-01-28 | 京东方科技集团股份有限公司 | 一种用于柔性显示的盖板以及可折叠的显示装置 |
| CN114141149A (zh) * | 2021-12-17 | 2022-03-04 | 合肥维信诺科技有限公司 | 柔性显示模组及显示装置 |
| CN114999327A (zh) * | 2022-06-21 | 2022-09-02 | 京东方科技集团股份有限公司 | 一种柔性盖板、显示模组及显示装置 |
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| US20170062742A1 (en) * | 2015-08-31 | 2017-03-02 | Samsung Display Co., Ltd. | Flexible display apparatus |
| US20210217975A1 (en) * | 2019-03-07 | 2021-07-15 | Boe Technology Group Co., Ltd. | Support Structure, Manufacturing Method Thereof, and Display Device |
| 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 |
| US20220007530A1 (en) * | 2019-08-30 | 2022-01-06 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Cover plate and flexible display device |
| CN113990206A (zh) * | 2021-11-29 | 2022-01-28 | 京东方科技集团股份有限公司 | 一种用于柔性显示的盖板以及可折叠的显示装置 |
| CN114141149A (zh) * | 2021-12-17 | 2022-03-04 | 合肥维信诺科技有限公司 | 柔性显示模组及显示装置 |
| CN114999327A (zh) * | 2022-06-21 | 2022-09-02 | 京东方科技集团股份有限公司 | 一种柔性盖板、显示模组及显示装置 |
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