WO2023010642A1 - 显示模组及其制作方法 - Google Patents

显示模组及其制作方法 Download PDF

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Publication number
WO2023010642A1
WO2023010642A1 PCT/CN2021/116465 CN2021116465W WO2023010642A1 WO 2023010642 A1 WO2023010642 A1 WO 2023010642A1 CN 2021116465 W CN2021116465 W CN 2021116465W WO 2023010642 A1 WO2023010642 A1 WO 2023010642A1
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WIPO (PCT)
Prior art keywords
display
display module
backplane
area
display area
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Ceased
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PCT/CN2021/116465
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English (en)
French (fr)
Inventor
胡鹏
段艳强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US17/606,767 priority Critical patent/US12579912B2/en
Publication of WO2023010642A1 publication Critical patent/WO2023010642A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
    • H05K7/20963—Heat transfer by conduction from internal heat source to heat radiating structure

Definitions

  • the present application relates to the field of display technology, in particular to a display module and a manufacturing method thereof.
  • the present application provides a display module and a manufacturing method thereof, so as to solve the technical problem of the existing display module that the backboard collapses due to insufficient stiffness of the backboard after bending, resulting in cracks or even breakage of the display panel.
  • a display module the display module includes a bending area
  • the display module includes a display panel and a backplane
  • the backplane is arranged on one side of the display panel
  • the backplane includes a base material
  • the base material is formed by splicing a first part and a second part, the second part is arranged near the terminal area of the display panel relative to the first part, and the stiffness of the second part is greater than that of the first part .
  • the thickness of the second part is greater than the thickness of the first part.
  • the display panel includes a display area and a non-display area, the bending area is located in the non-display area, the first part is set corresponding to the display area, and the second part is set corresponding to the non-display area , the second part is provided with a bar opening, and the bar opening is set corresponding to the bending area.
  • the thickness of the second part ranges from 70 ⁇ m to 100 ⁇ m
  • the thickness of the first part ranges from 10 ⁇ m to 50 ⁇ m.
  • the thickness of the second part is twice the thickness of the first part.
  • first part and the second part are made of the same material.
  • the material of the first part is polyimide
  • the material of the second part is selected from any one of polyethylene terephthalate, optical material COP, SRF material, and polyurethane.
  • the display panel includes a display area and a non-display area, the bending area is located in the non-display area, the first part is set corresponding to the display area, and the second part at least corresponds to the non-display area It is provided that the second part is provided with a bar mouth, and the bar mouth is set corresponding to the bending area.
  • the second part is set corresponding to the non-display area and part of the display area, and the width of the part of the second part corresponding to the display area is 100 ⁇ m-150 ⁇ m.
  • the display module further includes a heat dissipation buffering functional film layer, and the heat dissipation buffering functional film layer is attached to the surfaces of the first part and the second part facing away from the display panel.
  • a manufacturing method of a display module comprising the following steps:
  • a display panel and a backplane are provided, wherein the backplane comprises a substrate comprising a first portion and a second portion, the second portion having a greater stiffness than the first portion; and,
  • the back plate is attached to one side of the display panel, wherein the second part is closer to the bending area of the display module relative to the first part.
  • the backboard also includes a protective film and a release film, the first part and the second part are arranged between the release film and the protective film, and the step of sticking the backboard One side of the display panel includes:
  • a filling part is also provided between the first part and the protective film, the sum of the thicknesses of the first part and the filling part is equal to the thickness of the second part, and the filling part and the first Adhesion between one part is smaller than adhesion between the filling part and the protective film.
  • the substrate part of the back plate includes a first part and a second part, wherein the stiffness of the second part is greater than that of the Stiffness of the first part, when applied to the display module, the second part is arranged relative to the first part near the bending area of the display module, so that the backplane can be effectively strengthened when it is close to the display module.
  • Stiffness of the end of the bending region is improved, thereby effectively improving the collapse problem of the back plate caused by insufficient stiffness, thereby preventing cracks or even breakage of the display panel.
  • FIG. 1 is a schematic structural diagram of a display module in the prior art
  • Fig. 2 is a schematic structural diagram of the backplane provided by the first embodiment of the present application.
  • Figure 3 is a plan view of the substrate of the backsheet shown in Figure 2;
  • Fig. 4 is a partial structural schematic diagram of the display module provided by the first embodiment of the present application before bending;
  • Fig. 5 is a schematic structural view of the display module shown in Fig. 4 after bending;
  • FIG. 6 and FIG. 7 are structural schematic diagrams of the first module stacking of the display module of the present application in other embodiments.
  • Fig. 8 is a schematic structural diagram of the backplane provided by the second embodiment of the present application.
  • Fig. 9 is a partial structural schematic diagram of the display module provided by the second embodiment of the present application before bending;
  • Fig. 10 is a schematic structural view of the display module shown in Fig. 9 after bending;
  • FIG. 11 is a flow chart of a method for manufacturing a display module provided by an embodiment of the present application.
  • orientation words such as “up” and “down” usually refer to the up and down of the device in actual use or working state, specifically the direction of the drawings in the drawings ; while “inside” and “outside” refer to the outline of the device.
  • the backplane of the flexible display module in the prior art is usually thinned to improve the bending/bending performance of the display module, especially for folding products.
  • the display module of this type of product is bent, it is close to the bending area of the display module, and the back plate is prone to collapse at its end due to insufficient stiffness.
  • the display module 100 shown in FIG. 1 For example, it adopts pad bending technology, as shown in the circles A and B in the figure, in the bending area close to the display module 100, the end of the backplane 10 is prone to collapse due to insufficient stiffness , so that the display panel 20 is cracked or even broken due to the collapse of the backplane 10 .
  • FIGS. 1 to 10 are schematic structural diagrams of a display module 100 of the present application. It should be noted that the structural diagrams in Figures 1 to 10 are only schematic diagrams, and are only used to indicate the relative positions of the various structures. The dimensions of the various structures in the drawings are schematic rather than actual. The dimensional relationship of the structures is not limited.
  • the display module 100 includes a display panel 20 and a backplane 10 , and the backplane 10 is disposed on one side of the display panel 20 .
  • the display module 100 includes a bending area BA.
  • the backplane 10 includes a base material 11, and the base material 11 includes a first portion 111 and a second portion 112, the second portion 112 is disposed close to the bending area BA relative to the first portion 111, and the second portion The stiffness of the portion 112 is greater than the stiffness of the first portion 111 .
  • the present application designs the backplane 10, the base material 11 of the backplane 10 includes a first part 111 and a second part 112, wherein the stiffness of the second part 112 is greater than that of the first part 111 , when the backplane 10 is applied to the display module 100, the second part 112 is arranged close to the bending area BA of the display module 100 relative to the first part 111, thus effectively enhancing the The stiffness of the backplane 10 near the end of the bending area BA can effectively improve the collapse of the backplane 10 caused by insufficient stiffness, thereby preventing the display panel 20 from cracking or even breaking.
  • the backplane 10 provided in this embodiment includes a base material 11 , a protective film 12 and a release film 13 .
  • the substrate 11 is sandwiched between the protective film 12 and the release film 13 .
  • the substrate 11 includes a first part 111 and a second part 112 , and the stiffness of the second part 112 is greater than that of the first part 111 .
  • the first part 111 and the second part 112 are spliced to form the base material 11 .
  • the thickness of the first portion 111 is equal to the thickness of the second portion 112 .
  • the first part 111 adopts polyimide (PI), and the material of the second part 112 is selected from polyethylene terephthalate (PET), optical material COP, SRF material, and polyurethane (PU) any of the It can be understood that, in other embodiments, the materials of the first part 111 and the second part 112 can also adopt other configurations, as long as the stiffness requirement is met.
  • FIG. 4 and FIG. 5 are respectively partial structural schematic diagrams of the display module 100 provided in this embodiment before and after bending.
  • the display module 100 includes the above-mentioned backplane 10 and a display panel 20 .
  • the backplane 10 is disposed on one side of the display panel 20 .
  • the display module 100 also includes a first module stack 30 disposed on the side of the display panel 20 facing away from the backplane 10 , and a first module stack 30 disposed on the side of the backplane 10 facing away from the display panel 20 .
  • the second module stack 40 is respectively partial structural schematic diagrams of the display module 100 provided in this embodiment before and after bending.
  • the display module 100 includes the above-mentioned backplane 10 and a display panel 20 .
  • the backplane 10 is disposed on one side of the display panel 20 .
  • the display module 100 also includes a first module stack 30 disposed on the side of the display panel 20 facing away from the backplane 10 , and a first module stack 30 disposed
  • the display module 100 provided in this embodiment adopts pad bending technology, including a bending area BA. It can be understood that in other embodiments, the display module 100 may also adopt other bending techniques.
  • the display panel 20 includes a display area AA and a non-display area NA.
  • the bending area BA is located in the non-display area NA and spaced from the edge of the display area AA.
  • the first part 111 of the backplane 10 is arranged corresponding to the display area AA
  • the second part 112 of the backplane 10 is arranged at least corresponding to the non-display area NA
  • the second part 112 is provided with A bar opening 113
  • the bar opening 113 is arranged corresponding to the bending area BA
  • the bar opening 113 divides the second part 112 into a back-bending part and a non-back-bending part.
  • the side of the display module 100 used for display is defined as the display side
  • the side opposite to the display side is defined as the back side.
  • the non-backbent portion supports the display panel 20 toward the display side
  • the backbend portion supports the display panel 20 toward the back side.
  • the second portion 112 is not only disposed corresponding to the non-display area NA, but also disposed corresponding to a part of the display area AA, so as to further enhance its rigidity.
  • the width W1 of the part of the second part 112 corresponding to the display area AA is 100 ⁇ m-150 ⁇ m, so as to further strengthen the stiffness of the second part 112 while taking into account the display mode.
  • the bending performance of the first part 111 of the group 100 meets the bending performance requirements of flexible display devices, especially folding products; the non-backbending part of the second part 112 corresponds to the width of the part of the non-display area NA
  • the range W2 is 900 ⁇ m–1500 ⁇ m.
  • the first module stack 30 includes a cover plate 31 disposed on the display side of the display panel 20 and a polarizer 32 adhered to the inner side of the cover plate 31 by optical glue 33 . It can be understood that in other embodiments, the first module stack 30 can also adopt other combination modes, which can be specifically set according to product requirements.
  • the first module stack 30 can also consist of a cover plate 31 disposed on the display side of the display panel 20 and adhered to the polarizer 32 inside the cover plate 31 by optical glue 33 , and a protective layer 34 adhered to the outside of the cover plate 31 by optical glue 33 .
  • the first module stack 30 can also be made of a base 36 , adhered to the ultra-thin glass 35 on the display side of the base 36 through an optical glue 33 , and adhered to the substrate through an optical glue 33 .
  • the second module stack 40 is conventionally configured to support the display panel 20 .
  • the second module stack 40 includes a heat dissipation buffer function film layer 41 , a steel plate (SUS) 42 and a reinforcement layer 43 .
  • the heat dissipation buffer function film layer 41 and the reinforcement layer 43 are respectively provided on opposite sides of the steel plate 42, specifically, the heat dissipation buffer function film layer 41 is provided on the display side of the steel plate 42, and the reinforcement layer 43 It is provided on the back side of the steel plate 42 .
  • the thermal buffering function film layer 41 is pasted on one side surface of the first part 111 and the non-backbending part of the second part 112 .
  • the reinforcement layer 43 is attached to one side surface of the back-curved portion of the second portion 112 .
  • the display module 100 also includes a UV adhesive layer 50 and a flexible circuit board 60 .
  • the UV adhesive layer 50 is disposed on the display panel 20 and covers the bending area BA and part of the second portion 112 .
  • the width of the UV adhesive layer 50 covering the second portion 112 (excluding the bar opening 113 ) is greater than 150 um.
  • the flexible circuit board 60 is disposed at the terminal area of the non-display area NA of the display panel 20 , and after being bent, it is back-bent to the back side of the display module 100 .
  • the stiffness of the second part 112 is greater than that of the first part 111, when the back plate 10 is applied to the display module
  • the second part 112 is arranged close to the bending area BA of the display module 100, so as to effectively enhance the stiffness of the back plate 10 at the end close to the bending area BA, thereby effectively
  • the collapse problem of the back plate 10 caused by insufficient stiffness is improved, thereby preventing the display panel 20 from cracking or even breaking.
  • the structure of the backplane 10 provided in this embodiment is substantially the same as the structure of the backplane 10 provided in Embodiment 1, except that the first part 111 and the first part 111 in this embodiment
  • the thickness of the second portion 112 is different.
  • the thickness of the second portion 112 is greater than that of the first portion 111
  • the material of the first portion 111 is the same as that of the second portion 112 .
  • the second portion 112 has a thickness ranging from 70 ⁇ m to 100 ⁇ m
  • the first portion 111 has a thickness ranging from 10 ⁇ m to 50 ⁇ m.
  • the thickness of the second part 112 is 90 ⁇ m, and the thickness of the first part 111 is 20 ⁇ m-40 ⁇ m.
  • the thickness of the second portion 112 may be twice the thickness of the first portion 111 .
  • the difference between the structure of the backplane 10 provided in this embodiment and the structure of the backplane 10 provided in Embodiment 1 is that the non-backbending part of the second part 112 only corresponds to the non-display area.
  • the NA setting does not correspond to the display area AA setting.
  • the thickness of the back plate 10 corresponding to the display area AA can be made as thin as possible, that is, the thickness of the first part 111 can be made as thin as possible.
  • the thinness meets the requirements of flexible display products, especially folding products, for the AA bending performance of the display area.
  • the material of the first part 111 and the material of the second part 112 can be selected from polyimide (PI), polyethylene terephthalate (PET), optical Material COP, SRF material, and any one of polyurethane (PU). It can be understood that, in other embodiments, the materials of the first part 111 and the second part 112 can also adopt other configurations, as long as the stiffness requirement is met.
  • PI polyimide
  • PET polyethylene terephthalate
  • SRF material any one of polyurethane
  • the backplane 10 further includes a filling part 14 .
  • the filling part 14 is provided between the first part 111 and the protective film 12, and is used to fill the gap between the first part 111 and the protective film 12, so as to flatten the backplane 10, and facilitate Transportation and storage of the backplane 10 product.
  • the sum of the thicknesses of the filling part 14 and the first part 111 is equal to the thickness of the second part 112.
  • the viscosity between the filling part 14 and the first part 111 is smaller than the viscosity between the filling part 14 and the protective film 12 .
  • the viscosity between the filling part 14 and the protective film 12 is smaller than the viscosity between the filling part 14 and the protective film 12 .
  • the structure of the display module 100 provided in this embodiment is substantially the same as the structure of the display module 100 provided in Embodiment 1, the difference lies in the structure of the backplane 10 , and at the same time,
  • the heat dissipation and buffering function film layer 41 fills the empty space after the filling part 14 is torn off, so as to planarize the backplane 10 . That is, the heat dissipation and buffering function film layer 41 is pasted on the surface of the non-backbent portion of the first portion 111 and the second portion 112 facing away from the display panel 20 .
  • the stiffness of the second part 112 is greater than the stiffness of the first part 111 by designing the thickness of different parts of the backboard 10.
  • the second part 112 is arranged close to the bending area BA of the display module 100, so as to effectively improve the collapse problem of the backplane 10 caused by insufficient stiffness, thereby preventing the display panel from 20 cracks or even fractures.
  • this embodiment designs the thickness of different parts of the backplane 10 so that the thickness of the first part 111 of the display area AA can be as thin as possible, which meets the needs of flexible display products, especially foldable products. , the requirements for the bending performance of the display area AA.
  • the structure of the backplane 10 provided in this embodiment is substantially the same as the structure of the backplane 10 provided in Embodiment 2, except that the material of the first part 111 is different from that of the second part 112 , see Figure 9 and Figure 10 for specific illustrations.
  • the first part 111 is made of polyimide (PI), and the material of the second part 112 is selected from polyethylene terephthalate (PET), optical material COP, SRF material, and any one of polyurethane (PU). It can be understood that, in other embodiments, the materials of the first part 111 and the second part 112 can also adopt other configurations, as long as the stiffness requirement is met.
  • PI polyimide
  • PET polyethylene terephthalate
  • COP optical material
  • SRF material any one of polyurethane
  • the structure of the display module 100 provided in this embodiment is substantially the same as that of the display module 100 provided in Embodiment 2, except that the materials of different parts of the backplane 10 are different.
  • the stiffness of the second part 112 is greater than that of the first part 111.
  • the second part 112 When applied to the display module 100, the second part 112 is disposed close to the bending area BA of the display module 100, so as to effectively strengthen the end of the back plate 10 near the bending area BA. Stiffness, thereby effectively improving the collapse problem of the back plate 10 caused by insufficient stiffness, thereby preventing the display panel 20 from cracking or even breaking.
  • the present application also provides a manufacturing method of the above-mentioned display module 100, and the manufacturing method includes the following steps:
  • the backplane includes a substrate, the substrate includes a first part and a second part, and the stiffness of the second part is greater than that of the first part;
  • step S2 further includes:

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Abstract

一种显示模组（100）及其制作方法，显示模组（100）包括折弯区（BA），显示模组（100）包括显示面板（20）和设于显示面板（20）一侧的背板（10），背板（10）包括基材（11），基材（11）包括第一部分（111）和第二部分（112），第二部分（112）相对第一部分（111）靠近显示模组（100）的折弯区（BA）设置，第二部分（112）的硬挺性大于第一部分（111）的硬挺性。

Description

显示模组及其制作方法 技术领域
本申请涉及显示技术领域，尤其涉及一种显示模组及其制作方法。
背景技术
柔性显示产品逐渐成为市场的新趋势。为了提高柔性显示产品的弯折/弯曲性能，行业内一般采用减薄背板的方式，如在折叠显示产品中，使用超薄背板替代传统相对较厚的背板。然而，当背板减薄后，其硬挺性会随之降低，如此，在折弯(bending)作业之后，靠近显示模组的折弯区，背板由于挺性不足在其端部容易产生塌陷，从而导致显示面板因背板的塌陷而产生裂纹，甚至断裂。
技术问题
本申请提供一种显示模组及其制作方法，以解决现有的显示模组因在折弯之后因为背板挺性不足导致的背板塌陷，从而导致显示面板出现裂纹甚至断裂的技术问题。
技术解决方案
为解决上述问题，本申请提供的技术方案如下：
一种显示模组，所述显示模组包括折弯区，所述显示模组包括显示面板和背板，所述背板设于所述显示面板的一侧，所述背板包括基材，所述基材由第一部分和第二部分拼接形成，所述第二部分相对所述第一部分靠近所述显示面板的端子区设置，所述第二部分的硬挺性大于所述第一部分的硬挺性。
进一步的，所述第二部分的厚度大于所述第一部分的厚度。进一步的，所述显示面板包括显示区和非显示区，所述折弯区位于所述非显示区，所述第一部分对应所述显示区设置，所述第二部分对应所述非显示区设置，所述第二部分设有条口，所述条口对应所述折弯区设置。
进一步地，所述第二部分的厚度范围为70μm-100μm，所述第一部分的厚度范围为10μm-50μm。
进一步地，所述第二部分的厚度为所述第一部分的厚度的两倍。
进一步地，所述第一部分和所述第二部分的材料相同。
进一步地，所述第一部分的材料采用聚酰亚胺，所述第二部分的材料选自聚对苯二甲酸乙二醇酯，光学材料COP，SRF材料，和聚氨酯中的任意一种。
进一步地，所述显示面板包括显示区和非显示区，所述折弯区位于所述非显示区，所述第一部分对应所述显示区设置，所述第二部分至少对应所述非显示区设置，所述第二部分设有条口，所述条口对应所述折弯区设置。
进一步地，所述第二部分对应所述非显示区和部分所述显示区设置，所述第二部分对应所述显示区的部分的宽度范围为100μm–150μm。
进一步地，所述显示模组还包括散热缓冲功能膜层，所述散热缓冲功能膜层贴设于所述第一部分和所述第二部分的背向所述显示面板的一侧表面。
一种显示模组的制作方法，所述制作方法包括以下步骤：
提供显示面板和背板，其中，所述背板包括基材，所述基材包括第一部分和第二部分，所述第二部分的硬挺性大于所述第一部分的硬挺性；以及，
将所述背板贴合于所述显示面板的一侧，其中，所述第二部分相对所述第一部分靠近所述显示模组的折弯区。
进一步地，所述背板还包括保护膜和离型膜，所述第一部分和所述第二部分设于所述离型膜和所述保护膜之间，所述步骤将所述背板贴合于所述显示面板的一侧包括：
撕除所述背板的所述保护膜，将所述背板朝向所述保护膜的一侧贴合于所述显示面板的一侧；以及
撕除所述背板的所述离型膜。
进一步地，所述第一部分和所述保护膜之间还设有填充部，所述第一部分和所述填充部的厚度之和等于所述第二部分的厚度，所述填充部和所述第一部分之间的粘性小于所述填充部和所述保护膜之间的黏性。
有益效果
本申请的有益效果为：本申请提供的所述显示模组及其制作方法中，所述背板的基材部分包括第一部分和第二部分，其中，所述第二部分的硬挺性大于所述第一部分的硬挺性，在应用到所述显示模组中时，所述第二部分相对所述 第一部分靠近所述显示模组的折弯区设置，如此有效增强所述背板在靠近所述折弯区的端部的硬挺性，从而有效改善所述背板因硬挺性不足导致的塌陷问题，进而防止所述显示面板产生裂纹甚至断裂。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术中的显示模组的结构示意图；
图2是本申请的第一实施例提供的背板的结构示意图；
图3是图2中所示背板的基材的平面图；
图4是本申请的第一实施例提供的显示模组在折弯之前的部分结构示意图；
图5是图4所示显示模组在折弯之后的结构示意图；
图6和图7是本申请的显示模组的第一模组叠构在其它实施例中的结构示意图；
图8是本申请的第二实施例提供的背板的结构示意图；
图9是本申请的第二实施例提供的显示模组在折弯之前的部分结构示意图；
图10是图9所示显示模组在折弯之后的结构示意图；
图11是本申请实施例提供的显示模组的制作方法的流程图。
附图标记说明：
显示模组                          100
背板                              10
基材                              11
第一部分                          111
第二部分                          112
条口                              113
保护膜                            12
离型膜                            13
填充部                            14
显示面板                          20
显示区                            AA
非显示区                          NA
折弯区                            BA
第一模组叠构                      30
盖板                              31
偏光片                            32
光学胶                            33
保护层                            34
超薄玻璃                          35
基底                              36
第二模组叠构                      40
散热缓冲功能膜层                  41
钢板                              42
加固层                            43
UV胶层                            50
柔性电路板                        60
本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施例仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下” 通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
现有技术中的柔性显示模组的背板通常经过减薄处理，以提升显示模组的弯折/弯曲性能，尤其是折叠产品。然而，此类产品的显示模组在折弯(bending)作业之后，靠近显示模组的折弯区，背板由于挺性不足在其端部容易产生塌陷，以图1所示显示模组100为例，其采用垫弯(pad bending)技术，如图中圈A和圈B所示，在靠近显示模组100的折弯区，由于背板10的挺性不足在其端部容易产生塌陷，从而导致显示面板20因背板10的塌陷而产生裂纹，甚至断裂。
为了解决上述技术问题，本申请提供一种新的显示模组。图1至图10示出了本申请的显示模组100的结构示意图。需要说明的是，图1至图10的结构图仅为示意图，仅用于表明各个结构之间的相对位置，图档中的各个结构的尺寸为示意性，而非实际尺寸，图档对于各个结构的尺寸关系并不做限定。
请参见图4、图5、图9和图10，所述显示模组100包括显示面板20和背板10，所述背板10设于所述显示面板20的一侧。所述显示模组100包括折弯区(bending area)BA。所述背板10包括基材11，所述基材11包括第一部分111和第二部分112，所述第二部分112相对所述第一部分111靠近所述折弯区BA设置，所述第二部分112的硬挺性大于所述第一部分111的硬挺性。
本申请对所述背板10进行设计，所述背板10的基材11包括第一部分111和第二部分112，其中，所述第二部分112的硬挺性大于所述第一部分111的硬挺性，当所述背板10在应用到所述显示模组100中时，所述第二部分112相对所述第一部分111靠近所述显示模组100的折弯区BA设置，如此有效增强所述背板10在靠近所述折弯区BA的端部的硬挺性，从而有效改善所述背板10因硬挺性不足导致的塌陷问题，进而防止所述显示面板20产生裂纹甚至断裂。
下面对本申请提供的所述显示模组100及其背板10的具体实施例进行说明。
实施例一
请参见图2和图3，本实施例提供的背板10包括基材11、保护膜12和离型膜13。所述基材11夹设与所述保护膜12和所述离型膜13之间。所述基材11包括第一部分111和第二部分112，且所述第二部分112的硬挺性大于所述第一部分111的硬挺性。所述第一部分111和所述第二部分112通过拼接构成所述基材11。
在本实施例中，所述第一部分111的厚度等于所述第二部分112的厚度。所述第一部分111采用聚酰亚胺(PI)，所述第二部分112的材料选自聚对苯二甲酸乙二醇酯(PET)，光学材料COP，SRF材料，和聚氨酯(PU)中的任意一种。可以理解地，在其它实施例中，所述第一部分111和所述第二部分112的材料也可以采用其它的配置，只要满足硬挺性要求即可。
请参见图4和图5，二者分别是本实施例提供的所述显示模组100在折弯之前和折弯之后的部分结构示意图。所述显示模组100包括上述背板10和显示面板20。所述背板10设于所述显示面板20的一侧。所述显示模组100还包括设于所述显示面板20背向所述背板10一侧的第一模组叠构30，以及设于所述背板10背向所述显示面板20一侧的第二模组叠构40。
请参见图4和图5，本实施例提供的所述显示模组100采用垫弯(pad bending)技术，包括折弯区BA。可以理解地，在其它实施例中，所述显示模组100也可以采用其它折弯技术。所述显示面板20包括显示区AA和非显示区NA。所述折弯区BA位于所述非显示区NA内，且与所述显示区AA的边缘间隔。所述背板10的所述第一部分111对应所述显示区AA设置，所述背板10的所述第二部分112至少对应所述非显示区NA设置，所述第二部分112上设有条口113，所述条口113对应所述折弯区BA设置，所述条口113将所述第二部分112分为背弯部分和非背弯部分。为方便说明，定义所述显示模组100用于显示的一侧为显示侧，与所述显示侧背对的一侧为背侧。所述非背弯部分支撑所述显示面板20朝向显示侧，所述背弯部分支撑所述显示面板20朝向背侧。
优选地，所述第二部分112除了对应所述非显示区NA设置之外，还对应部分所述显示区AA设置，以进一步加强其硬挺性。在本实施例中，所述第二部分112对应所述显示区AA的部分的宽度范围W1为100μm–150μm，以 在进一步加强所述第二部分112的硬挺性的同时，兼顾所述显示模组100的所述第一部分111的弯折性能，满足柔性显示装置，尤其是折叠产品的弯折性能要求；所述第二部分112的非背弯部分对应所述非显示区NA的部分的宽度范围W2为900μm–1500μm。在本实施例中，所述第一模组叠构30包括设于所述显示面板20的显示侧的盖板31和通过光学胶33粘附于所述盖板31内侧的偏光片32。可以理解地，在其它实施例中，所述第一模组叠构30还可以采用其它组合模式，具体可以按照产品需求进行设置。
如图6所示，所述第一模组叠构30还可以由设于所述显示面板20的显示侧的盖板31，通过光学胶33粘附于所述盖板31内侧的偏光片32，以及通过光学胶33粘附于所述盖板31外侧的保护层34组成。
如图7所示，所述第一模组叠构30还可以由基底36，通过光学胶33粘附于所述基底36的显示侧的超薄玻璃35，通过光学胶33粘附于所述基底36的背侧的偏光片32，以及通过光学胶33粘附于所述超薄玻璃35的显示侧的保护层34组成。
所述第二模组叠构40采用常规设置，用以支撑所述显示面板20。在本实施例中，所述第二模组叠构40包括散热缓冲功能膜层41、钢板(SUS)42和加固层43。所述散热缓冲功能膜层41和加固层43分别设于所述钢板42的相对两侧，具体地，所述散热缓冲功能膜层41设于所述钢板42的显示侧，所述加固层43设于所述钢板42的背侧。所述散热缓冲功能膜层41贴设于所述第一部分111和所述第二部分112的非背弯部分的一侧表面。所述加固层43贴设于所述第二部分112的背弯部分的一侧表面。
进一步地，所述显示模组100还包括UV胶层50和柔性电路板60。在本实施例中，所述UV胶层50设于所述显示面板20上，且覆盖所述折弯区BA和部分所述第二部分112。所述UV胶层50覆盖所述第二部分112(不包括所述条口113)的宽度大于150um。所述柔性电路板60设于所述显示面板20的非显示区NA的端子区，且在折弯之后，背弯至所述显示模组100的背侧。
在本实施例中，通过对所述背板10的材料进行设计，使得所述第二部分112的硬挺性大于所述第一部分111的硬挺性，当所述背板10应用到所述显示模组100中时，所述第二部分112靠近所述显示模组100的折弯区BA设置， 如此有效增强所述背板10在靠近所述折弯区BA的端部的硬挺性，从而有效改善所述背板10因硬挺性不足导致的塌陷问题，进而防止所述显示面板20产生裂纹甚至断裂。
实施例二
请参见图8，本实施例提供的所述背板10的结构和实施例一提供的所述背板10的结构大致相同，不同之处在于：本实施例中的所述第一部分111和所述第二部分112的厚度不同。所述第二部分112的厚度大于所述第一部分111的厚度，且所述第一部分111的材料与所述第二部分112的材料相同。
具体地，在本实施例中，所述第二部分112的厚度范围为70μm-100μm，所述第一部分111的厚度范围为10μm-50μm。
优选地，所述第二部分112厚度采用90μm，所述第一部分111的厚度采用20μm-40μm。
优选地，所述第二部分112的厚度可以是第一部分111的厚度的2倍。
本实施例提供的所述背板10的结构和实施例一提供的所述背板10的结构的不同之处还在于，所述第二部分112的非背弯部分仅对应所述非显示区NA设置，而不对应所述显示区AA设置。如此，在保证所述第二部分112的硬挺性的同时，可以使得所述背板10对应所述显示区AA的厚度可以尽可能的薄，即可以使得所述第一部分111的厚度可以尽可能的薄，满足了柔性显示产品，尤其是折叠产品，对于显示区AA弯折性能的要求。
具体地，在本实施例中，所述第一部分111的材料和所述第二部分112的材料可以选自聚酰亚胺(PI)，聚对苯二甲酸乙二醇酯(PET)，光学材料COP，SRF材料，和聚氨酯(PU)中的任意一种。可以理解地，在其它实施例中，所述第一部分111和所述第二部分112的材料也可以采用其它的配置，只要满足硬挺性要求即可。
优选地，在本实施例中，所述背板10还包括填充部14。所述填充部14设于所述第一部分111和所述保护膜12之间，用以填充所述第一部分111和所述保护膜12之间的间隙，以平坦化所述背板10，方便所述背板10产品的运输和保存。所述填充部14和所述第一部分111的厚度之和等于所述第二部 分112的厚度。
优选地，所述填充部14和所述第一部分111之间的粘性小于所述填充部14和所述保护膜12之间的黏性。如此，在后续将所述背板10组装至所述显示模组100中时，有利于在撕离所述保护膜12时顺带撕离所述填充部14。
请参见图9和图10，本实施例提供的显示模组100的结构和实施例一提供的所述显示模组100的结构大致相同，不同之处在于所述背板10的结构，同时，在本实施例中，所述散热缓冲功能膜层41填充撕离所述填充部14后的空白处，以平坦化所述背板10。即，所述散热缓冲功能膜层41贴设于所述第一部分111和所述第二部分112的非背弯部分背向所述显示面板20的一侧表面。
在本实施例中，通过对所述背板10的不同部位的厚度设计，使得所述第二部分112的硬挺性大于所述第一部分111的硬挺性，当所述背板10应用到所述显示模组100中时，所述第二部分112靠近所述显示模组100的折弯区BA设置，从而有效改善所述背板10因硬挺性不足导致的塌陷问题，进而防止所述显示面板20产生裂纹甚至断裂。另外，本实施例通过对所述背板10的不同部位的厚度设计，使得对于所述显示区AA的所述第一部分111的厚度可以尽可能的薄，满足了柔性显示产品，尤其是折叠产品，对于显示区AA弯折性能的要求。
实施例三
本实施例提供的所述背板10的结构和实施例二提供的所述背板10的结构大致相同，不同之处在于：所述第一部分111的材料与所述第二部分112的材料不同，具体图示可以参见图9和图10。
具体地，在本实施例中，所述第一部分111采用聚酰亚胺(PI)，所述第二部分112的材料选自聚对苯二甲酸乙二醇酯(PET)，光学材料COP，SRF材料，和聚氨酯(PU)中的任意一种。可以理解地，在其它实施例中，所述第一部分111和所述第二部分112的材料也可以采用其它的配置，只要满足硬挺性要求即可。
本实施例提供的显示模组100的结构和实施例二提供的所述显示模组100 的结构大致相同，不同之处在于所述背板10的不同部位的材料。
在本实施例中，通过同时对所述背板10的不同部位的厚度和材料进行设计，使得所述第二部分112的硬挺性大于所述第一部分111的硬挺性，当所述背板10应用到所述显示模组100中时，所述第二部分112靠近所述显示模组100的折弯区BA设置，如此有效增强所述背板10在靠近所述折弯区BA的端部的硬挺性，从而有效改善所述背板10因硬挺性不足导致的塌陷问题，进而防止所述显示面板20产生裂纹甚至断裂。
请参见图11，本申请还提供一种上述显示模组100的制作方法，所述制作方法包括以下步骤：
S1，提供显示面板和背板，其中，所述背板包括基材，所述基材包括第一部分和第二部分，所述第二部分的硬挺性大于所述第一部分的硬挺性；以及，
S2，将所述背板贴合于所述显示面板的一侧，其中，所述第二部分相对所述第一部分靠近所述显示模组的折弯区。
其中，所述步骤S2进一步包括：
撕除所述背板的所述保护膜，将所述背板朝向所述保护膜的一侧贴合于所述显示面板的一侧；以及
撕除所述背板的所述离型膜。
其中，所述显示面板20和所述背板10的结构如上述实施例所示，此处不再重复赘述。
综上所述，虽然本申请已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申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (14)

  1. 一种显示模组，其中，所述显示模组包括折弯区，所述显示模组包括显示面板和背板，所述背板设于所述显示面板的一侧，所述背板包括基材，所述基材包括第一部分和第二部分，所述第二部分相对所述第一部分靠近所述折弯区设置，所述第二部分的硬挺性大于所述第一部分的硬挺性。
  2. 根据权利要求1所述的显示模组，其中，所述第二部分的厚度大于所述第一部分的厚度。
  3. 根据权利要求2所述的显示模组，其中，所述显示面板包括显示区和非显示区，所述折弯区位于所述非显示区，所述第一部分对应所述显示区设置，所述第二部分对应所述非显示区设置，所述第二部分设有条口，所述条口对应所述折弯区设置。
  4. 根据权利要求2所述的显示模组，其中，所述第二部分的厚度范围为70μm-100μm，所述第一部分的厚度范围为10μm-50μm。
  5. 根据权利要求2所述的显示模组，其中，所述第二部分的厚度为所述第一部分的厚度的两倍。
  6. 根据权利要求2所述的显示模组，其中，所述第一部分和所述第二部分的材料相同。
  7. 根据权利要求2所述的显示模组，其中，所述第一部分的材料采用聚酰亚胺，所述第二部分的材料选自聚对苯二甲酸乙二醇酯，光学材料COP，SRF材料，和聚氨酯中的任意一种。
  8. 根据权利要求1所述的显示模组，其中，所述第一部分的材料采用聚酰亚胺，所述第二部分的材料选自聚对苯二甲酸乙二醇酯，光学材料COP，SRF材料，和聚氨酯中的任意一种。
  9. 根据权利要求1所述的显示模组，其中，所述显示面板包括显示区和非显示区，所述折弯区位于所述非显示区，所述第一部分对应所述显示区设置，所述第二部分至少对应所述非显示区设置，所述第二部分设有条口，所述条口对应所述折弯区设置。
  10. 根据权利要求9所述的显示模组，其中，所述第二部分对应所述非显示区和部分所述显示区设置，所述第二部分对应所述显示区的部分的宽度范围 为100μm–150μm。
  11. 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散热缓冲功能膜层，所述散热缓冲功能膜层贴设于所述第一部分和所述第二部分的背向所述显示面板的一侧表面。
  12. 一种显示模组的制作方法，其中，所述制作方法至少包括以下步骤：
    提供显示面板和背板，其中，所述背板包括基材，所述基材包括第一部分和第二部分，所述第二部分的硬挺性大于所述第一部分的硬挺性；以及，
    将所述背板贴合于所述显示面板的一侧，其中，所述第二部分相对所述第一部分靠近所述显示模组的折弯区。
  13. 根据权利要求12所述的制作方法，其中，所述背板还包括保护膜和离型膜，所述第一部分和所述第二部分设于所述离型膜和所述保护膜之间，所述步骤将所述背板贴合于所述显示面板的一侧包括：
    撕除所述背板的所述保护膜，将所述背板朝向所述保护膜的一侧贴合于所述显示面板的一侧；以及
    撕除所述背板的所述离型膜。
  14. 根据权利要求13所述的制作方法，其中，所述第一部分和所述保护膜之间还设有填充部，所述第一部分和所述填充部的厚度之和等于所述第二部分的厚度，所述填充部和所述第一部分之间的粘性小于所述填充部和所述保护膜之间的黏性。
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