WO2022141199A1 - 显示模组及其贴合方法 - Google Patents
显示模组及其贴合方法 Download PDFInfo
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- WO2022141199A1 WO2022141199A1 PCT/CN2020/141411 CN2020141411W WO2022141199A1 WO 2022141199 A1 WO2022141199 A1 WO 2022141199A1 CN 2020141411 W CN2020141411 W CN 2020141411W WO 2022141199 A1 WO2022141199 A1 WO 2022141199A1
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- WIPO (PCT)
- Prior art keywords
- display area
- curved
- thickness
- display module
- thinned
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 18
- 230000007423 decrease Effects 0.000 claims abstract description 10
- 238000010030 laminating Methods 0.000 claims description 11
- 239000012790 adhesive layer Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 abstract description 12
- 238000005336 cracking Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 14
- 230000007935 neutral effect Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000003475 lamination Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/03—Covers
Definitions
- the present invention relates to the field of display technology, and in particular, to a display module and a bonding method thereof.
- Embodiments of the present invention provide a display module and a bonding method thereof, so as to solve the problem of the bending position of the flexible display panel when the U-shaped cover plate is bonded with the flexible display panel or after the bonding is completed in the existing display module. It is easy to produce cracks, resulting in technical problems of dark lines during the reliability test of the product.
- An embodiment of the present invention provides a display module, including a flat display area and a curved display area bent and extended from the edge of the flat display area, including a curved cover plate, a flexible display panel attached to the curved cover plate, and a back plate , the back plate is disposed on the side of the flexible display panel away from the cover plate; wherein, the back plate includes a thinned portion, and the thickness of the thinned portion extends from the edge region of the flat display area to the surrounding area.
- the back panel includes a main body part located in the flat display area, the main body part is connected with the thinned part, and the thinned part extends from the edge of the main body part to the In the curved surface display area; the thickness of the thinned portion changes continuously.
- connection between the thinned portion and the main body portion is located in the flat display area.
- the vertical distance between the connection and the edge of the flat display area is smaller than the vertical distance between the connection and the center of the flat display area.
- the minimum thickness of the thinned portion is 1/2 ⁇ 1/3 of the thickness of the main body portion.
- the thickness of the thinned portion varies linearly.
- the thickness variation of the thinned portion is nonlinear.
- An embodiment of the present invention also provides a display module, including a flat display area and a curved display area bent and extended from the edge of the flat display area, including a curved cover plate, a flexible display panel attached to the curved cover plate, and a back
- the back plate is disposed on the side of the flexible display panel away from the cover plate; wherein, the back plate includes a thinned portion, and the thickness of the thinned portion extends from the edge region of the flat display area to the The curved display area gradually decreases.
- the back plate includes a main body part located in the flat display area, the main body part is connected with the thinned part, and the thinned part extends from the edge of the main body part to the curved surface display area.
- connection between the thinned portion and the main body portion is located in the flat display area.
- the vertical distance between the connection and the edge of the flat display area is smaller than the vertical distance between the connection and the center of the flat display area.
- the vertical distance from the connection to the corresponding edge of the curved display area is greater than 0 mm and less than 0.5 mm.
- the minimum thickness of the thinned portion is 1/2 ⁇ 1/3 of the thickness of the main body portion.
- the thickness of the thinned portion changes continuously.
- the thickness of the thinned portion varies linearly.
- the thickness variation of the thinned portion is nonlinear.
- an adhesive layer is attached between the curved cover plate and the flexible display panel, and a polarizer is arranged between the adhesive layer and the flexible display panel.
- An embodiment of the present invention also provides a method for laminating a display module, comprising the following steps:
- the curved cover plate defines a flat display area and a curved display area bent and extended from the edge of the flat display area;
- a backplane is provided on a side away from the light-emitting side of the flexible display panel, the backplane includes a thinned portion, and the thickness of the thinned portion extends from the edge region of the flat display area to the direction of the flat display area. the curved display area gradually decreases;
- the back plate includes a main body part located in the flat display area, the main body part is connected with the thinned part, and the thinned part extends from the edge of the main body part to the curved surface display area.
- the thickness of the thinned portion changes continuously.
- the thickness of the thinned portion varies linearly.
- the part of the backplane extending from the edge area of the flat display area to the curved display area can have a gradually decreasing thickness, the stress on the flexible display panel in the curved display area can be reduced, and the curved sides of the flexible display panel can be improved. The risk of cracking occurs, thereby increasing the reliability and competitiveness of the product.
- FIG. 1 is a schematic structural diagram of a display module before a flexible display panel and a curved cover plate are attached according to an embodiment of the present invention.
- FIG. 2 is a schematic structural diagram of a display module after a flexible display panel and a curved cover plate are bonded together according to an embodiment of the present invention.
- FIG. 3 is a flow chart of steps of a method for laminating a display module according to an embodiment of the present invention.
- 4A-4D are schematic structural diagrams of a lamination process of laminating a flexible display panel and a curved cover plate according to an embodiment of the present invention.
- the present application provides a display module and a bonding method thereof.
- the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
- FIG. 1 is a schematic structural diagram of a display module before the flexible display panel and the curved cover plate are attached
- FIG. 2 is the flexible display panel and the curved cover plate after the flexible display panel according to the embodiment of the present invention is attached.
- An embodiment of the present invention provides a display module 100 .
- the display module 100 includes a flat display area 101 and a curved display area 102 , and the curved display area 102 is bent and extended from the edge of the flat display area 101 .
- the curved display area 102 is disposed on at least one side of the flat display area 101 .
- the curved display area 102 in the embodiment of the present invention may be disposed on two opposite sides of the flat display area 101 .
- the curved display area 102 may be disposed on the On two opposite long sides of the flat display area 101 , the flat display area 101 and the curved display area 102 together form a U-shaped display area.
- the display module 100 includes a curved cover plate 10 , a flexible display panel 30 and a back plate 20 , the flexible display panel 30 is attached to the curved cover plate 10 , and the back plate 20 is disposed on the flexible display panel 30 away from the back plate 20 .
- the back plate 20 supports and protects the flexible display panel 30 .
- the flexible display panel 30 When the curved cover plate 10 is attached to the flexible display panel 30, since the edge of the flexible display panel 30 needs to be bent into the same arc shape as the curved cover plate 10, the flexible display panel 30 to be The bending part is affected by greater stress, which is prone to cracks, resulting in dark lines during the reliability test of the product.
- the embodiment of the present invention reduces the stress on the flexible display panel 30 in the curved display area 102 by reducing the thickness of the portion of the back panel 20 corresponding to the curved display area 102 .
- a polarizer is attached to the flexible display panel 30, and a structure such as a heat dissipation material is attached.
- the traces of the flexible display panel 30 located in the curved display area 102 are located on the neutral layer and are subject to tensile stress. Therefore, reducing the thickness of the portion of the backplane 20 corresponding to the curved display area 102 can make the neutral layer move upward, so that the traces of the flexible display panel 30 are closer to the neutral layer, thereby making the neutral layer move up. The tensile stress of the traces is reduced, reducing the risk of cracks.
- the backplane 20 includes a thinned portion 21 , and the thickness of the thinned portion 21 gradually decreases from the edge region of the flat display area 101 to the curved display area 102 .
- the thinned portion 21 may extend along the direction of two opposite long sides of the flat display area 101 , and the thinned portion 21 is flush with the long side of the flat display area 101 , so
- the backplane 20 is thinned from the position where the two long sides of the flat display area 101 enter the curved display area 102, so as to improve the risk of cracks occurring on the long sides of the flexible display panel 30 that need to be bent, Improve product reliability and competitiveness.
- the thickness of the thinned portion 21 gradually decreases from the flat display area 101 , that is, the thickness of the back plate 20 can be thinned from the flat display area 101 .
- the back panel 20 further includes a main body portion 22 , and the main body portion 22 is located in the flat display area 101 .
- the thickness of the main body portion 22 does not change, that is, the thickness of the main body portion 22 is greater than the thickness of any part of the thinned portion 21 .
- the main body portion 22 is connected to the thinned portion 21 , and the thinned portion 21 extends from the edge of the main body portion 22 into the curved display area 102 .
- the first thickness H of the thinned portion 21 is 1/2 to 1/3 times the thickness of the main body portion 22 , and the first thickness H refers to the distance between the thinned portion 21 and the main body portion 22 .
- the thinning thickness range of the back plate 20 should not only meet the requirements of reducing the stress of the wiring, but also meet the requirements of no wrinkles when the back plate 20 is attached, as well as the convenience of cutting and processing. In other embodiments, the first thickness H may be adjusted according to actual products.
- the thinned portion 21 is designed to be gradually thinned, and also has the advantage of stronger supporting force for the curved display area 102 .
- the backplane 20 is thinned from the flat display area 101 . Specifically, the connection between the thinned portion 21 and the main body portion 22 is located in the flat display area 101 .
- the thinned portion 21 is close to the edge of the flat display area 101 , that is, the vertical distance between the connection point and the edge of the flat display area 101 is smaller than the connection point and the center of the flat display area 101 vertical distance between.
- the vertical distance D from the connection between the thinned portion 21 and the main body portion 22 to the corresponding edge of the flat display area 101 can be designed to be greater than 0 mm and less than 0.5 mm. That is, the horizontal and vertical distance between the initial thinning position of the back plate 20 and the initial bending position of the curved cover plate 10 is greater than 0 mm and less than 0.5 mm.
- the flat display area 101 corresponds to the flat portion of the curved cover plate 10
- the curved display area 102 corresponds to the curved portion of the curved cover plate 10 .
- the adhesive layer 50 is also attached between the curved cover plate 10 and the flexible display panel 30 .
- the adhesive layer 50 may be an optical adhesive layer, which is used for attaching the curved cover plate 1 and the curved cover plate 10 .
- a polarizer 40 is disposed between the adhesive layer 50 and the flexible display panel 30 to improve the contrast ratio of the display module 100 in a strong light environment.
- a heat-dissipating substrate is also disposed on the side of the backplane 20 away from the flexible display panel 30 to dissipate heat from the display module 100 .
- the flexible display panel 30 is closer to the film layer of the display module 100 than in the prior art.
- the neutral layer Since the film layer at the neutral layer is neither under tensile nor compressive stress, the length of the neutral layer during bending is the same as before bending, so the film layer close to the neutral layer is subjected to The stress will be relatively small.
- One side surface of the panel 30 is flush, and the side surface of the thinned portion 21 facing away from the flexible display panel 30 is an inclined surface.
- the thickness of the thinned portion 21 changes continuously.
- the thickness variation of the thinned portion 21 may be a linear variation, for example, a surface of the thinned portion 21 on one side away from the flexible display panel 30 may be a straight slope.
- the thickness variation of the thinned portion 21 is a non-linear variation, for example, a side surface of the thinned portion 21 away from the flexible display panel 30 may be an arc-shaped slope.
- the straight inclined plane is easier to realize in the process, but the stress effect of the curved inclined plane during bending will be relatively small.
- the two inclined planes have their own advantages, and the embodiment of the present invention is preferably straight. bevel.
- an embodiment of the present invention also provides a method for preparing the above-mentioned display module 100, including the following steps:
- a curved cover plate 10 is provided.
- the curved cover plate 10 defines a flat display area 101 and a curved display area 102 bent and extended from the edge of the flat display area 101 .
- a flexible display panel 30 is provided, and a backplane 20 is disposed on the side away from the light-emitting side of the flexible display panel 30.
- the backplane 20 includes a thinned portion 21, and the thickness of the thinned portion 21 is determined from the The edge area of the flat display area 101 gradually decreases toward the curved display area 102 .
- Step S30 attaching the light-emitting side of the flexible display panel 30 to the curved cover plate 10 .
- the lamination process of the curved cover plate 10 and the flexible display panel can be divided into two steps, including laminating the flat display area first, and then laminating the curved display area.
- the integrally formed curved cover plate 10 in a curved state is placed on a corresponding material table, and the flexible display panel 30 is placed on a support table 60 having a boss 61 . Only the flexible display panel 30 is illustrated in FIGS. 4A to 4D , and other film layers superimposed on the flexible display panel 30 are omitted here.
- a guide film 80 is arranged between the flexible display panel 30 and the boss 61 , and both ends of the guide film 80 are clamped by clamps 70 , and the clamping angle of the clamps 70 is changed by changing the size of the clamping angle. , to change the curvature of the guide film 80 , so as to guide the flexible display panel 30 to bend.
- the flat flexible display panel 30 and the guide film 80 are placed on the surface of the boss 61 , and after alignment is performed with a CCD camera, the adhesive on the flexible display panel 30 is After the layers are removed, the flexible display panel 30 is pre-bent.
- the flexible display panel 30 is bent into the same shape as the boss 61 by changing the direction of the clamp of the clamp 70 .
- the flat display area is then attached. Specifically, the support table 60 is moved in a vertical direction, so that the flexible display panel 30 and the flat display area of the curved cover 10 are in contact with each other. Partially fit.
- the curved display area is then attached. Specifically, the guide film 80 is stretched by a clamp, so that the guide film 80 moves toward the curved display area, thereby driving the flexible display panel 30 Approaching the part of the curved display area of the curved cover plate 10 , so that the flexible display panel 30 is attached to the part of the curved display area of the curved cover plate 10 .
- Components such as a polarizer and a touch layer may also be attached between the curved cover plate 10 and the flexible display panel 30 , and these components have the same bending shape and angle as the flexible display panel 30 when they are attached.
- a heat-dissipating substrate is also disposed on the side of the backplane 20 away from the flexible display panel 30 to dissipate heat from the display module 100 .
- the first thickness H of the thinned portion 21 of the back panel 20 in the embodiment of the present invention is the main body
- the first thickness H refers to the thickness of the end portion of the thinned portion 21 on the side away from the main body portion 22 . That is, the minimum thickness of each portion of the thinned portion 21 is 1/2 to 1/3 times the thickness of the main body portion 22 . In other embodiments, the first thickness H may be adjusted according to actual products.
- the thinned portion 21 can be designed on two opposite long sides of the flat display area 101 , and the back plate 20 starts from the position where the two long sides of the flat display area 101 enter the curved display area 102
- the thinning process is performed to improve the risk of cracks occurring on the long sides of the flexible display panel 30 that need to be bent, thereby improving the reliability and competitiveness of the product.
- the thinned portion 21 can be made into a straight slope with a gradually decreasing thickness; in other embodiments, the thinned portion 21 can also be made into a gradually reduced thickness Small arc-shaped inclined surface, the curved inclined surface is more conducive to bending when bending than the straight inclined surface.
- the portion of the backplane 20 extending from the edge region of the flat display area 101 to the curved display area 102 to have a gradually decreasing thickness, the stress of the flexible display panel 30 in the curved display area 102 can be reduced. , improving the risk of cracks occurring on the curved sides of the flexible display panel 102, thereby improving the reliability and competitiveness of the product.
- a display module and a bonding method thereof provided by the embodiments of the present invention have been introduced in detail above.
- the principles and implementations of the present invention are described with specific examples in this paper.
- the descriptions of the above embodiments are only used to help Understand the technical solution of the present invention and its core idea; those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or The replacement does not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
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Abstract
公开一种显示模组，包括平面显示区和自平面显示区边缘弯曲延伸的曲面显示区，显示模组包括曲面盖板、与曲面盖板贴合的柔性显示面板以及背板，背板包括减薄部，减薄部的厚度自平面显示区的边缘区域向曲面显示区逐渐减小。本申请能够降低柔性显示面板在曲面显示区的受力，改善柔性显示面板的弯曲的边侧发生裂纹的风险。
Description
本发明涉及显示技术领域，尤其涉及一种显示模组及其贴合方法。
在现代通信行业中，手机、电视、平板、笔记本以及数码相机等产品的市场需求越来越大，各种显示设备也正向全面屏发展，在柔性全面屏显示模组制造中，侧边显示设计正在成为下一代显示产品发展的潮流。现在的U形贴合产品的弯曲角度大于90度，在贴U形盖板时和完成后，由于显示面板的受力过大，显示面板的两个长边侧的弯曲位置容易产生裂纹，导致产品在做信赖性测试时出现暗线。
因此，现有的U形贴合产品存在易发生裂纹的风险，现有的U形贴合产品亟需改进。
本发明实施例提供一种显示模组及其贴合方法，以解决现有的显示模组中，U形盖板在与柔性显示面板贴合时或贴合完成后，柔性显示面板的弯曲位置易产生裂纹，导致产品在做信赖性测试时出现暗线的技术问题。
为解决上述问题，本发明提供的技术方案如下：
本发明实施例提供一种显示模组，包括平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区，包括曲面盖板、与所述曲面盖板贴合的柔性显示面板以及背板，所述背板设置于所述柔性显示面板背离所述盖板的一侧；其中，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小；所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内；所述减薄部的厚度变化呈连续性变化。
在本发明的一种实施例中，所述减薄部与所述主体部的连接处位于所述平面显示区。
在本发明的一种实施例中，所述连接处与所述平面显示区边缘之间的垂直距离小于所述连接处与所述平面显示区中心之间的垂直距离。
在本发明的一种实施例中，所述减薄部的最小厚度为所述主体部的厚度的1/2~1/3。
在本发明的一种实施例中，所述减薄部的厚度变化呈线性变化。
在本发明的一种实施例中，所述减薄部的厚度变化呈非线性变化。
本发明实施例还提供一种显示模组，包括平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区，包括曲面盖板、与所述曲面盖板贴合的柔性显示面板以及背板，所述背板设置于所述柔性显示面板背离所述盖板的一侧；其中，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小。
在本发明的一种实施例中，所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内。
在本发明的一种实施例中，所述减薄部与所述主体部的连接处位于所述平面显示区。
在本发明的一种实施例中，所述连接处与所述平面显示区边缘之间的垂直距离小于所述连接处与所述平面显示区中心之间的垂直距离。
在本发明的一种实施例中，所述连接处至对应的所述曲面显示区边缘的垂直距离大于0毫米且小于0.5毫米。
在本发明的一种实施例中，所述减薄部的最小厚度为所述主体部的厚度的1/2~1/3。
在本发明的一种实施例中，所述减薄部的厚度变化连续性变化。
在本发明的一种实施例中，所述减薄部的厚度变化呈线性变化。
在本发明的一种实施例中，所述减薄部的厚度变化呈非线性变化。
在本发明的一种实施例中，所述曲面盖板与所述柔性显示面板之间贴附有胶层，所述胶层与所述柔性显示面板之间设置有偏光片。
本发明实施例还提供一种显示模组的贴合方法，包括以下步骤：
S10，提供一曲面盖板，所述曲面盖板上定义有平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区；
S20，提供一柔性显示面板，背离所述柔性显示面板出光侧的一侧设置有背板，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小；
S30，将所述柔性显示面板的出光侧与所述曲面盖板贴合。
在本发明的一种实施例中，所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内。
在本发明的一种实施例中，所述减薄部的厚度变化呈连续性变化。
在本发明的一种实施例中，所述减薄部的厚度变化呈线性变化。
通过将背板的自平面显示区的边缘区域延伸至曲面显示区内的部分设计成厚度逐渐递减的结构，能够降低柔性显示面板在曲面显示区的受力，改善柔性显示面板的弯曲的边侧发生裂纹的风险，进而提升产品的可靠性和竞争力。
图1为本发明实施例提供的柔性显示面板与曲面盖板贴合之前的显示模组的结构示意图。
图2为本发明实施例提供的柔性显示面板与曲面盖板贴合之后的显示模组的结构示意图。
图3为本发明实施例提供的显示模组的贴合方法的步骤流程图。
图4A-4D为本发明实施例提供的柔性显示面板与曲面盖板贴合的贴合过程的结构示意图。
本申请提供一种显示模组及其贴合方法，为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
请参阅图1和图2，图1为柔性显示面板与曲面盖板贴合之前的显示模组的结构示意图，图2为为本发明实施例提供的柔性显示面板与曲面盖板贴合之后的显示模组的结构示意图。本发明实施例提供一种显示模组100，所述显示模组100包括平面显示区101和曲面显示区102，所述曲面显示区102自所述平面显示区101边缘弯曲延伸。
所述曲面显示区102至少设置于所述平面显示区101的一侧边，本发明实施例的曲面显示区102可设置于所述平面显示区101的两相对侧边，具体可设置于所述平面显示区101的两相对的长边侧，所述平面显示区101和所述曲面显示区102一起形成U形的显示区。
所述显示模组100包括曲面盖板10、柔性显示面板30以及背板20，所述柔性显示面板30与所述曲面盖板10贴合，背板20设置于所述柔性显示面板30背离所述曲面盖板10的一侧，所述背板20对所述柔性显示面板30起到支撑和保护作用。
所述曲面盖板10在与所述柔性显示面板30贴合时，由于需要将柔性显示面板30的边缘部位弯曲成与所述曲面盖板10相同的弧状，因此所述柔性显示面板30的待弯曲部位受到较大的应力影响，容易产生裂纹，导致产品在做信赖性测试时出现暗线。本发明实施例通过削减所述背板20的对应于所述曲面显示区102内的部分的厚度，来降低所述柔性显示面板30在所述曲面显示区102内所受的应力。
一般在所述柔性显示面板30与所述曲面盖板10贴合之前，还会对柔性显示面板30贴附偏光片，以及贴附散热材等结构，在所述柔性显示面板30与所述曲面盖板10贴合之后，所述柔性显示面板30的位于所述曲面显示区102内的走线处于中性层之上，受到拉应力。因此削减所述背板20的对应于所述曲面显示区102内的部分的厚度，能够使得中性层上移，从而使得所述柔性显示面板30的走线更靠近于中性层，进而使得走线的拉应力减小，降低发生裂纹的风险。
具体地，所述背板20包括减薄部21，所述减薄部21的厚度自所述平面显示区101的边缘区域向所述曲面显示区102逐渐减小。
具体地，所述减薄部21可沿着所述平面显示区101的两相对的长边侧的方向延伸，所述减薄部21与所述平面显示区101的长边侧平齐，所述背板20自所述平面显示区101的两长边侧进入所述曲面显示区102的位置开始做减薄处理，从而改善所述柔性显示面板30需要弯曲的长边侧发生裂纹的风险，提升产品的可靠性和竞争力。
一种实施例中，所述减薄部21的厚度自所述平面显示区101内逐渐减小，即所述背板20的厚度可从所述平面显示区101内开始做减薄处理。
所述背板20还包括主体部22，所述主体部22位于所述平面显示区101。所述主体部22的厚度不做改变，即所述主体部22的厚度大于所述减薄部21任一处的厚度。
所述主体部22与所述减薄部21连接，所述减薄部21自所述主体部22边缘延伸至所述曲面显示区102内。所述减薄部21的第一厚度H为所述主体部22的厚度的1/2~1/3倍，所述第一厚度H指的是所述减薄部21远离所述主体部22一侧的端部的厚度。即所述减薄部21的最小厚度为所述主体部22的厚度的1/2~1/3倍。对所述背板20的减薄厚度范围既要考虑能满足减小走线的应力，同时也要满足所述背板20贴附时不发生褶皱，以及裁切和加工的便利性。在其他实施例中，所述第一厚度H可视实际产品做出调整。
相比较于直接对所述减薄部21进行均一厚度的减薄设计，所述减薄部21为渐变减薄的设计，还具有对所述曲面显示区102的支撑力更强的优势。
一种实施例中，所述背板20自所述平面显示区101开始做减薄处理。具体地，所述减薄部21与所述主体部22的连接处位于所述平面显示区101。
优选地，所述减薄部21靠近所述平面显示区101的边缘，即所述连接处与所述平面显示区101边缘之间的垂直距离小于所述连接处与所述平面显示区101中心之间的垂直距离。
考虑到贴合设备的贴合精度以及裁切精度，所述减薄部21与所述主体部22的连接处至对应的所述平面显示区101边缘的垂直距离D可设计为大于0毫米且小于0.5毫米。即所述背板20的减薄起始位置距离所述曲面盖板10的起始弯曲位置的水平垂直距离大于0毫米且小于0.5毫米。
所述平面显示区101对应于所述曲面盖板10的平面部分，所述曲面显示区102对应于曲面盖板10的曲面部分。
所述曲面盖板10与所述柔性显示面板30之间还贴附有胶层50。所述胶层50可为光学胶层，用于贴合所述曲面盖板1与所述曲面盖板10。
所述胶层50与所述柔性显示面板30之间设置有偏光片40，用于提高所述显示模组100在强光环境下的对比度。
所述背板20背离所述柔性显示面板30的一侧还设置有散热基材，以对所述显示模组100进行散热。
通过设置厚度逐渐减薄的所述减薄部21，使得在所述曲面显示区102内，相比于现有技术，所述柔性显示面板30会更靠近所述显示模组100的膜层中的中性层。由于在所述中性层处的膜层既不受拉应力也不受压应力，所述中性层在弯曲过程中的长度和弯曲前一样，因此靠近所述中性层的膜层所受的应力会相对较小一些。
一种实施例中，请参阅图1，所述柔性显示面板处于平直状态时，所述减薄部21靠近所述柔性显示面板30的一侧表面与所述主体部22靠近所述柔性显示面板30的一侧表面平齐，所述减薄部21背离所述柔性显示面板30的一侧表面为斜面。
所述减薄部21的厚度变化呈连续性变化。一种实施例中，所述减薄部21的厚度变化可为线性变化，如所述减薄部21背离所述柔性显示面板30的一侧表面可为平直斜面。在其他实施例中，所述减薄部21的厚度变化呈非线性变化，如所述减薄部21背离所述柔性显示面板30的一侧表面可为弧形斜面。平直斜面相较于弧形斜面来说，在工艺上更易实现，但弧形斜面在弯曲时受到的应力影响会相对较小一些，两种斜面各有优势，本发明实施例优选为平直斜面。
请参阅图3和图1，基于上述显示模组100的结构，本发明实施例还提供上述显示模组100的制备方法，包括以下步骤：
步骤S10，提供一曲面盖板10，所述曲面盖板10上定义有平面显示区101和自所述平面显示区101边缘弯曲延伸的曲面显示区102。
步骤S20，提供一柔性显示面板30，背离所述柔性显示面板30出光侧的一侧设置有背板20，所述背板20包括减薄部21，所述减薄部21的厚度自所述平面显示区101的边缘区域向所述曲面显示区102逐渐减小。
步骤S30，将所述柔性显示面板30的出光侧与所述曲面盖板10贴合。
所述曲面盖板10与所述柔性显示面板的贴合过程可分为两步进行，包括先进行平面显示区的贴合，再进行曲面显示区的贴合。
请参阅图4A至图4D，首先将已一体成型的呈弯曲状态的曲面盖板10置于相应的物料台上，所述柔性显示面板30置于一具有凸台61的支撑台60上。图4A至图4D中仅示意出柔性显示面板30，其他与柔性显示面板30叠加的膜层在这里略去。
具体地，在所述柔性显示面板30与所述凸台61之间设置一导向膜80，所述导向膜80的两端利用夹具70夹持，通过改变所述夹具70的夹持角度的大小，来改变所述导向膜80弯曲的弧度大小，从而引导所述柔性显示面板30弯曲。
请参阅图4A，将平直状态的所述柔性显示面板30和所述导向膜80置于所述凸台61表面，利用CCD相机进行对位之后，将所所述柔性显示面板30上的胶层撕除后，对所述柔性显示面板30进行预弯。
请参阅图4B，具体地，通过改变所述夹具70的夹头的方向使得所述柔性显示面板30弯曲成与所述凸台61相同的形状。
请参阅图4C，之后进行平面显示区的贴合，具体地，将所述支撑台60进行竖直方向的移动，以使得所述柔性显示面板30与所述曲面盖板10的平面显示区的部分进行贴合。
请参阅图4D，再进行曲面显示区的贴合，具体地，利用夹具拉伸所述导向膜80，使得所述导向膜80向靠近所述曲面显示区移动，进而带动所述柔性显示面板30向所述曲面盖板10的曲面显示区的部分靠近，使得所述柔性显示面板30与所述曲面盖板10的曲面显示区的部分贴合。
所述曲面盖板10与所述柔性显示面板30之间还可贴附有偏光片、触摸层等部件，在贴合时这些部件与柔性显示面板30的弯曲形状以及角度相同。
所述背板20背离所述柔性显示面板30的一侧还设置有散热基材，以对所述显示模组100进行散热。
为了保证在曲面显示区贴合时，所述背板20贴附时不发生褶皱，因此本发明实施例中的所述背板20的所述减薄部21的第一厚度H为所述主体部22的厚度的1/2~1/3倍，所述第一厚度H指的是所述减薄部21远离所述主体部22一侧的端部的厚度。即所述减薄部21的各个部位中的最小的厚度为所述主体部22的厚度的1/2~1/3倍。在其他实施例中，所述第一厚度H可视实际产品做出调整。
所述减薄部21可设计于所述平面显示区101的两相对的长边侧，所述背板20自所述平面显示区101的两长边侧进入所述曲面显示区102的位置开始做减薄处理，从而改善所述柔性显示面板30需要弯曲的长边侧发生裂纹的风险，提升产品的可靠性和竞争力。
在本实施例中，考虑到工艺制程的便利性，所述减薄部21可做成厚度逐渐递减的平直斜面；在其他实施例中，所述减薄部21也可做成厚度逐渐减小的弧形斜面，弧形斜面较平直斜面在弯曲时可更有利于弯折。
通过将背板20的自所述平面显示区101的边缘区域延伸至所述曲面显示区102内的部分设计成厚度逐渐减小的结构，能够降低柔性显示面板30在曲面显示区102的受力，改善柔性显示面板102的弯曲的边侧发生裂纹的风险，进而提升产品的可靠性和竞争力。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本发明实施例所提供的一种显示模组及其贴合方法进行了详细介绍，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；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例的技术方案的范围。
Claims (20)
- 一种显示模组，包括平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区，其中，所述显示模组包括：曲面盖板；柔性显示面板，与所述曲面盖板贴合；以及背板，设置于所述柔性显示面板背离所述盖板的一侧；其中，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小；所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内；所述减薄部的厚度变化呈连续性变化。
- 根据权利要求1所述的显示模组，其中，所述减薄部与所述主体部的连接处位于所述平面显示区。
- 根据权利要求2所述的显示模组，其中，所述连接处与所述平面显示区边缘之间的垂直距离小于所述连接处与所述平面显示区中心之间的垂直距离。
- 根据权利要求2所述的显示模组，其中，所述减薄部的最小厚度为所述主体部的厚度的1/2~1/3。
- 根据权利要求1所述的显示模组，其中，所述减薄部的厚度变化呈线性变化。
- 根据权利要求1所述的显示模组，其中，所述减薄部的厚度变化呈非线性变化。
- 一种显示模组，包括平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区，其中，所述显示模组包括：曲面盖板；柔性显示面板，与所述曲面盖板贴合；以及背板，设置于所述柔性显示面板背离所述盖板的一侧；其中，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小。
- 根据权利要求7所述的显示模组，其中，所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内。
- 根据权利要求8所述的显示模组，其中，所述减薄部与所述主体部的连接处位于所述平面显示区。
- 根据权利要求9所述的显示模组，其中，所述连接处与所述平面显示区边缘之间的垂直距离小于所述连接处与所述平面显示区中心之间的垂直距离。
- 根据权利要求10所述的显示模组，其中，所述连接处至对应的所述平面显示区边缘的垂直距离大于0毫米且小于0.5毫米。
- 根据权利要求9所述的显示模组，其中，所述减薄部的最小厚度为所述主体部的厚度的1/2~1/3。
- 根据权利要求7所述的显示模组，其中，所述减薄部的厚度变化呈连续性变化。
- 根据权利要求13所述的显示模组，其中，所述减薄部的厚度变化呈线性变化。
- 根据权利要求13所述的显示模组，其中，所述减薄部的厚度变化呈非线性变化。
- 根据权利要求7所述的显示模组，其中，所述曲面盖板与所述柔性显示面板之间贴附有胶层，所述胶层与所述柔性显示面板之间设置有偏光片。
- 一种显示模组的贴合方法，包括以下步骤：S10，提供一曲面盖板，所述曲面盖板上定义有平面显示区和自所述平面显示区边缘弯曲延伸的曲面显示区；S20，提供一柔性显示面板，背离所述柔性显示面板出光侧的一侧设置有背板，所述背板包括减薄部，所述减薄部的厚度自所述平面显示区的边缘区域向所述曲面显示区逐渐减小；S30，将所述柔性显示面板的出光侧与所述曲面盖板贴合。
- 根据权利要求17所述的显示模组的贴合方法，其中，所述背板包括位于所述平面显示区的主体部，所述主体部与所述减薄部连接，所述减薄部自所述主体部边缘延伸至所述曲面显示区内。
- 根据权利要求17所述的显示模组的贴合方法，其中，所述减薄部的厚度变化呈连续性变化。
- 根据权利要求19所述的显示模组的贴合方法，其中，所述减薄部的厚度变化呈线性变化。
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|---|---|---|---|---|
| CN115116335A (zh) * | 2022-07-19 | 2022-09-27 | 武汉华星光电半导体显示技术有限公司 | 显示模组及显示装置 |
| CN115273686A (zh) * | 2022-08-19 | 2022-11-01 | 京东方科技集团股份有限公司 | 盖板及其制备方法、曲面屏 |
| CN115273663A (zh) * | 2022-07-19 | 2022-11-01 | 武汉华星光电半导体显示技术有限公司 | 显示面板及显示装置 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114170900B (zh) * | 2021-11-30 | 2023-11-17 | 京东方科技集团股份有限公司 | 柔性显示面板及显示装置 |
| CN114842744B (zh) * | 2022-03-28 | 2024-02-23 | 昆山国显光电有限公司 | 曲面盖板及显示装置、电子设备 |
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| CN115273663A (zh) * | 2022-07-19 | 2022-11-01 | 武汉华星光电半导体显示技术有限公司 | 显示面板及显示装置 |
| CN115273663B (zh) * | 2022-07-19 | 2024-03-26 | 武汉华星光电半导体显示技术有限公司 | 显示面板及显示装置 |
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| CN115273686A (zh) * | 2022-08-19 | 2022-11-01 | 京东方科技集团股份有限公司 | 盖板及其制备方法、曲面屏 |
| CN115273686B (zh) * | 2022-08-19 | 2023-12-26 | 京东方科技集团股份有限公司 | 盖板及其制备方法、曲面屏 |
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