WO2021238434A1 - 曲面贴合装置及曲面贴合方法 - Google Patents

曲面贴合装置及曲面贴合方法 Download PDF

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Publication number
WO2021238434A1
WO2021238434A1 PCT/CN2021/086121 CN2021086121W WO2021238434A1 WO 2021238434 A1 WO2021238434 A1 WO 2021238434A1 CN 2021086121 W CN2021086121 W CN 2021086121W WO 2021238434 A1 WO2021238434 A1 WO 2021238434A1
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WO
WIPO (PCT)
Prior art keywords
flexible
curved
curved surface
jig
profiling jig
Prior art date
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PCT/CN2021/086121
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English (en)
French (fr)
Inventor
莫文蔚
青威
马朋莎
刘少奎
陈廷辉
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/636,718 priority Critical patent/US11884050B2/en
Publication of WO2021238434A1 publication Critical patent/WO2021238434A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B37/1018—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using only vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0046—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by constructional aspects of the apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/10—Removing layers, or parts of layers, mechanically or chemically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1866—Handling of layers or the laminate conforming the layers or laminate to a convex or concave profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1875—Tensioning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/003—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid air inclusion

Definitions

  • the present disclosure relates to the technical field of curved surface display, in particular to a curved surface bonding device and a curved surface bonding method.
  • OLED flexible display panels as display components of electronic devices have been widely used in various electronic products, and with the development of curved screens, the arc length of the outer glass cover of OLED modules is getting longer and longer. Higher requirements are put forward for the full bonding method of the glass cover plate and the flexible OLED.
  • the existing vacuum bonding technology can only meet the bonding of the small arc (30°-40°) glass cover plate and the display panel, and there is no corresponding solution for the bonding method of the large arc glass cover plate and the display panel.
  • the embodiment of the present disclosure provides a curved surface laminating device for realizing the bonding of a curved cover plate and a flexible panel, including:
  • a flexible profiling jig comprising: a pressing surface, the pressing surface having a shape that matches the curved cover plate;
  • a carrier film located between the pressing surface and the flexible panel, and extending to both sides of the pressing surface; the carrier film is configured to be attached to the flexible panel;
  • a tensioning device is in contact with the supporting film extending to both sides of the pressing surface, and the tensioning device is configured to tension the supporting film so that the supporting film and the pressing surface imitate shape.
  • the curvature of the bent portion of the pressing surface is 90°-180°.
  • the thickness of the flexible profiling jig is greater than 50 mm in the vertical direction of the plane where the flexible profiling jig is located.
  • the flexible profiling jig further includes: an inner concave surface connected with the end surface of the pressing surface.
  • the curvature of the inner concave surface is 80°-160°.
  • the tensioning device in the vertical direction of the thickness of the flexible profiling jig, is arranged coplanar with the waist of the inner concave surface.
  • the inner concave surface and the bearing squeezed by the tensioning device In the above-mentioned curved surface laminating device provided by the embodiment of the present disclosure, in the vertical direction of the thickness of the flexible profiling jig, the inner concave surface and the bearing squeezed by the tensioning device The distance between the films is less than 0.5mm.
  • the tensioning device is a pressing roller.
  • the curved surface laminating device provided by the embodiment of the present disclosure further includes: a first servo motor configured to drive the tensioning device to move in a direction perpendicular to the thickness of the flexible profiling jig.
  • the curved surface laminating device provided by the embodiment of the present disclosure further includes: a second servo motor configured to drive the carrier film to travel in a direction opposite to the movement direction of the tensioning device.
  • curved surface laminating device provided by the embodiment of the present disclosure, it further includes: an upper jig configured to fix the curved surface cover plate.
  • the curved surface cover plate includes a main body and two bending parts located at both ends of the main body;
  • the upper jig includes a first part and two second parts located at both ends of the first part; the first part matches the shape of the main body of the curved plate, and the two second parts are respectively connected to the The shape of the two bending parts of the protective cover plate is matched; the first part is detachably connected with the two second parts respectively.
  • a lower jig configured to fix the flexible profiling jig.
  • the embodiment of the present disclosure also provides a curved surface bonding method for bonding by using any one of the bonding devices described above, including:
  • the tensioning device is driven to squeeze the carrier film to bend toward the flexible profiling jig, so as to drive the flexible panel to bend with the carrier film to realize the imitating of the flexible panel and the pressing surface contained in the flexible profiling jig. shape;
  • the flexible profiling jig is driven toward the curved cover to drive the carrier film and the flexible panel to enter the opening of the curved cover, so that the non-bending area of the flexible panel and the curved cover Fit the non-bending area of the board;
  • the flexible profiling jig is continuously driven to move toward the curved cover plate to drive the two ends of the carrier film and the flexible panel to bend and deform, so that the bending area of the flexible substrate and the curved cover plate The bending area fits;
  • the carrier film and the flexible panel are peeled off.
  • Figure 1 is a schematic diagram of the structure of a curved surface laminating device in the related art
  • FIG. 2 is a schematic structural diagram of a curved surface laminating device provided by an embodiment of the disclosure
  • FIG. 3 is a schematic structural diagram of a flexible profiling jig provided by an embodiment of the disclosure.
  • FIG. 4 is a schematic structural diagram of a 180° inverted curved surface cover provided by an embodiment of the disclosure.
  • FIG. 5 is a flowchart of a curved surface bonding method provided by an embodiment of the disclosure.
  • the edge end surface of the OLED flexible panel is usually set as a curved surface, so that the image in the edge area can also be displayed normally during display. Therefore, the edge end surface of the protective cover is also usually
  • the curved surface is arranged to form a curved cover plate that is compatible with the flexible panel with the curved surface.
  • "fitting" means that the shapes are approximately the same.
  • the bonding of the curved cover 101 and the flexible panel 102 is usually achieved by the curved bonding device shown in FIG. 1.
  • the pressing surface of the flexible profiling jig 103 is used to carry the carrier film 104
  • the carrier film 104 is used to attach the flexible panel 102.
  • the flexible profiling jig 103 moves upward and close to the curved cover 101, and the air cylinder 105 clamps the carrier film 104 to realize the profiling of the flexible panel 102, that is, the shape of the flexible panel 102 and the pressing surface are similar, and the pressing surface
  • the shape of is the same as the shape of the curved cover 101, so that the flexible panel 102 and the curved cover 101 can be integrated in the order from the flat area in the middle to the bending areas on both sides.
  • an embodiment of the present disclosure provides a curved surface laminating device, as shown in FIG. 2, comprising: a flexible profiling jig 103, the flexible profiling jig 103 includes: a pressing surface 103' ,
  • the pressing surface 103' has a shape adapted to the curved cover 101, that is, the upper surface of the pressing surface 103' and the lower surface of the curved cover 101 are approximately the same in shape and size;
  • the carrier film 104 is located between the pressing surface 103' and the flexible panel 102 and extends to both sides of the pressing surface 103'; the carrier film 104 is configured to be attached to the flexible panel 102;
  • the tensioning device 201 is in contact with the supporting film 104 extending to both sides of the pressing surface 103'.
  • the tensioning device 201 is configured to tension the supporting film 104 so that the supporting film 104 drives the flexible panel 102 and the pressing surface 103' copying.
  • the tensioning device 201 is added on both sides of the pressing surface 103' of the flexible profiling jig 103, so that the carrier film 104 is subjected to the tensioning device 201 during the laminating process. Extrusion in the X direction is bent and deformed toward the flexible profiling jig 103 to drive the flexible panel 102 on the carrier film 104 to achieve good or even complete profiling with the pressing surface 103 ′ of the flexible profiling jig 103.
  • the profiling of the flexible panel 102 and the pressing surface 103' of the flexible profiling jig 103 is well completed before lamination, thereby avoiding the pre-contact between the side of the flexible panel 102 and the curved cover 101 causing bubbles and cracks And other defects, improve the bonding yield.
  • the tensioning device 201 can be driven to move in the vertical direction (ie, the X direction) of the thickness of the flexible profiling jig 103 by a driving element (for example, the first servo motor 202).
  • the curved cover 101 may be a glass cover, and the upper jig 106 fixes the curved cover 101 by vacuum suction and clamping by short sides.
  • the lower jig 107 is provided with a contour groove adapted to the lower end surface of the flexible contour jig 103 to fix the flexible contour jig 103 through the contour groove.
  • the curved cover 101 and the flexible panel 102 are glued together by optical adhesive (OCA).
  • the optical adhesive can be coated on the flexible panel 102 before the flexible panel 102 enters the accommodating space of the upper jig 106.
  • the panel 102 is in contact with the curved cover 101 under the combined action of the thrust of the lower jig 107 and the pressure of the upper jig 106, the two can be bonded together.
  • the lower jig 107 can be powered by a hydraulic column to realize up and down translation.
  • the lower jig 106 can be driven to drive the flexible panel 102 to move up to a distance of 1 mm from the inner area of the curved cover 101, Then reduce the moving speed of the lower jig 106 so that the inner flat area of the curved cover 101 and the optical glue are in contact from the middle to the two ends to complete the bonding process of the flat area; then the lower jig 106 is driven to continue to move upwards to Increasing the bonding pressure, the pressing surface 103' deforms to the left and right sides to match the bending area of the curved cover 101, and the tensioning device 201 squeezes the load-bearing film 104 to drive the flexible panel 102 to complete and press the left and right sides.
  • the profiling of the mating surface 103' realizes the bonding of the left and right bent parts.
  • the tensioning device 201 may be a pressing roller, a spring, a tensioner, and other components that can move back and forth in the X direction.
  • the number of tensioning devices 201 is not limited in the present disclosure.
  • FIG. 2 only exemplarily shows two tensioning devices 201 on both sides of the flexible profiling jig 103.
  • the flexible profiling jig 103 can be made of materials with high fatigue strength and high resilience characteristics such as rubber and silica gel.
  • the curvature ⁇ of the bending part of the pressing surface 103' is 90°-180°. Since the pressing surface 103' has a shape suitable for the curved cover 101, the curvature of the bent part of the curved cover 101 is also 90° ⁇ 180°, so as to realize the large-radius curved cover 101 and the flexible panel 102. fit.
  • the size of the flexible panel 102 in the X direction may be slightly smaller than the length of the opening of the curved cover 101, so that the flexible panel 102 can be Entering into the accommodating space of the curved cover 101 prevents the optical glue from contacting the curved cover 101 in advance, and facilitates the good matching and bonding of the flexible panel 102 and the curved cover 101.
  • the upper jig 106 can be designed to include a first part 1061 and two second parts 1062 located at both ends of the first part 1061, and the first part 1061 is detachably connected to the two second parts 1062 respectively.
  • the main body portion 1011 of the curved cover plate 101 may include a flat area D and two 1/4 arc bending areas R1 located at both ends of the flat area D; the sub-body portion 1012 of the curved cover plate 101 Including the 1/4 arc bending area R2; the 1/4 arc bending area R2 of the auxiliary body portion 1012 and the 1/4 arc bending area R1 of the main body portion 1011 are connected to form 180 degrees between the main body portion 1011 and the auxiliary body portion 1012 Bend.
  • the curved cover 101 is in a shape with both ends bent at 180 degrees, and the curved part is in the shape of a semi-circular arc.
  • the main body part 1011 and the auxiliary body part 1012 divide the semi-circular arc-shaped curved parts equally, and each has a 1/4 arc bending area.
  • the first part 1061 and the two second parts 1062 of the upper jig 106 are identical to the main body 1011 and the two auxiliary bodies 1012 of the curved cover 101.
  • the curved cover 101 can be fixed in the accommodating space formed by the upper jig 106 by the following methods: first, the two second parts 1062 and the first part 1061 of the upper jig 106 are disassembled and separated; and then the main body of the curved cover 101 The part 1011 is in contact with the first part 1061 of the upper jig 106; finally, the two second parts 1062 of the upper jig 106 are respectively covered on the two auxiliary body parts 1012 of the curved cover 101, and the two second parts 1062 are fixedly installed on the first part 1061 respectively.
  • the thickness h of the shaped jig 103 is greater than 50 mm.
  • the thickness h of the flexible profiling jig 103 is generally 16 mm.
  • the thickness h of the flexible profiling jig 103 is increased to increase the deformation of the flexible profiling jig 103, which is beneficial to realize the tensioning device.
  • 201 presses and contours the carrier film 104.
  • the flexible profiling jig 103 further includes an inner concave surface in contact with the end surface of the pressing surface 103 ′.
  • the design of the upper part expansion and the middle waist contraction can ensure that after the flexible profiling jig 103 is pressed, the pressing surface 103' is squeezed to the left and right sides and drives the bending part of the bearing film 104 and the flexible panel 102 to complete the curved cover The profiling fit of the bending part of 101.
  • the curvature ⁇ of the concave surface is 80°-160°, for example, it can be 80°, 90°, 100°, 110°. °, 120°, 130°, 140°, 150°, 160°, etc.
  • the tensioning device 201 it is convenient for the tensioning device 201 to apply the compressive stress to the carrier film 104, so that the carrier film 104 can better drive the flexible panel 102 to realize the profiling with the pressing surface 103'.
  • the waist is coplanar. Since the waist of the flexible profiling jig 103 (ie the middle area) has the largest concave width, the tensioning device 201 and the waist of the concave surface are arranged on the same plane to make the tensioning device 201 concave in the direction The stroke in the X direction is the largest, so that the carrier film 104 can be squeezed better to drive the flexible panel 102 to complete the profiling of the pressing surface 103'.
  • the tensioning device 201 can also be arranged near the waist of the inner concave surface along the Z direction, which is not specifically limited here.
  • the inner concave surface is squeezed by the tensioning device 201
  • the distance between the supporting films 104 is less than 0.5 mm.
  • the carrier film 104 will contact the concave surfaces on both sides of the flexible profiling jig 103 at zero distance to ensure that the carrier film 104 drives the flexible panel 102 to realize the contact with the flexible profiling jig 103
  • the second servo motor 203 is configured to drive the carrier film 104 to travel in a direction opposite to the direction of movement of the tensioning device 201. Since the direction of the pulling force is opposite to the direction of the compression stress of the tensioning device 201, there will be a certain distance between the inner concave surface and the carrier film 104 squeezed by the tensioning device 201 to a certain extent.
  • the distance between the carrier film 104 and the concave surfaces on both sides of the flexible profiling jig 103 under the squeezing action of the tensioning device 201 in the present disclosure is less than In the case of 0.5mm, a good profiling effect can still be guaranteed.
  • the embodiments of the present disclosure provide a curved surface bonding method using the above-mentioned curved surface bonding device for bonding. Since the principle of the bonding method to solve the problem is similar to the principle of the above-mentioned curved surface bonding device to solve the problem, For the implementation of the curved surface laminating method provided in the embodiment of the present invention, reference may be made to the implementation of the curved surface laminating device provided in the embodiment of the present invention, and repetitions are not repeated here.
  • a curved surface fitting method provided by an embodiment of the present disclosure, as shown in FIG. 5, may specifically include the following steps:
  • the flexible profiling jig needs to be driven away from the accommodating space of the upper jig 106, because the flexible profiling jig itself is prone to damage.
  • the force is deformed and can be restored to its original state after the external force is removed. Therefore, the jig 107 can be moved downward under the control of a hydraulic column, so that the flexible profiling jig moves down with the lower jig 107. During the downward movement, the flexible profiling jig moves down.
  • the shaped jig will be separated from the carrier film 104 and leave the accommodating space from the opening of the accommodating space.
  • the side of the carrier film 104 in contact with the flexible panel 102 can be made of a UV-viscosity adhesive, and its viscosity can be greatly reduced by ultraviolet radiation, so that the carrier film 104 can be easily peeled off from the flexible panel 102.
  • the above-mentioned curved surface laminating device and curved surface laminating method provided by the embodiments of the present disclosure include: a flexible profiling jig, the flexible profiling jig includes: a pressing surface, the pressing surface has a shape matching the curved cover;
  • the load-bearing film is located between the pressing surface and the flexible panel and extends to both sides of the pressing surface; the load-bearing film is configured to attach the flexible panel;
  • the tensioning device is in contact with the load-bearing film extending to both sides of the pressing surface, The tensioning device is configured to tension the carrier film so that the carrier film conforms to the pressing surface.
  • the carrier film is squeezed by the tensioning device in the X direction to bend and deform toward the flexible profiling jig during the lamination process.
  • the flexible panel will complete the profiling of the pressing surface of the flexible profiling jig along with the carrier film. That is, a good profiling of the flexible panel and the pressing surface with the flexible profiling jig is completed before lamination, thereby avoiding the pre-contact of the side of the flexible panel and the curved cover, causing defects such as bubbles and cracks, and improving the good lamination. Rate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Electroluminescent Light Sources (AREA)
  • Liquid Crystal (AREA)

Abstract

本公开提供了一种曲面贴合装置及曲面贴合方法，用于实现曲面盖板与柔性面板的贴合，包括：柔性仿形治具，柔性仿形治具包括：压合面，压合面具有与曲面盖板相适配的形状；承载膜，位于压合面与柔性面板之间，并延伸至压合面的两侧；承载膜被配置为贴附柔性面板；张紧装置，与延伸至压合面两侧的承载膜接触，张紧装置被配置为将承载膜张紧，以使承载膜与压合面仿形。

Description

曲面贴合装置及曲面贴合方法
相关申请的交叉引用
本申请要求在2020年05月28日提交中国专利局、申请号为202010467136.9、申请名称为“曲面贴合装置及曲面贴合方法”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。
技术领域
本公开涉及曲面显示技术领域，尤其涉及一种曲面贴合装置及曲面贴合方法。
背景技术
目前，OLED柔性显示面板作为电子设备的显示部件已经广泛的应用于各种电子产品中，且随着曲面屏的开发，OLED模组外玻璃盖板的弧区长度也越来越长，这就对玻璃盖板与柔性OLED的全贴合方法提出了更高的要求。现有的真空贴合技术只能满足小弧度(30°～40°)玻璃盖板与显示面板的贴合，对于大弧度玻璃盖板与显示面板的贴合方式缺乏相应的应对方案。
发明内容
本公开实施例提供了一种曲面贴合装置，用于实现曲面盖板与柔性面板的贴合，包括：
柔性仿形治具，所述柔性仿形治具包括：压合面，所述压合面具有与所述曲面盖板相适配的形状；
承载膜，位于所述压合面与所述柔性面板之间，并延伸至所述压合面的两侧；所述承载膜被配置为贴附所述柔性面板；
张紧装置，与延伸至所述压合面两侧的所述承载膜接触，所述张紧装置被配置为将所述承载膜张紧，以使所述承载膜与所述压合面仿形。
可选地，在本公开实施例提供的上述曲面贴合装置中，所述压合面中弯折部分的弧度为90°～180°。
可选地，在本公开实施例提供的上述曲面贴合装置中，在所述柔性仿形治具所在平面的垂直方向上，所述柔性仿形治具的厚度大于50mm。
可选地，在本公开实施例提供的上述曲面贴合装置中，所述柔性仿形治具还包括：与所述压合面的端面连接的内凹面。
可选地，在本公开实施例提供的上述曲面贴合装置中，所述内凹面的弧度为80°～160°。
可选地，在本公开实施例提供的上述曲面贴合装置中，在所述柔性仿形治具厚度的垂直方向上，所述张紧装置与所述内凹面的腰部共面设置。
可选地，在本公开实施例提供的上述曲面贴合装置中，在所述柔性仿形治具厚度的垂直方向上，所述内凹面与受所述张紧装置挤压作用的所述承载膜之间的距离小于0.5mm。
可选地，在本公开实施例提供的上述曲面贴合装置中，所述张紧装置为压附滚轮。
可选地，在本公开实施例提供的上述曲面贴合装置中，还包括：第一伺服马达，被配置为驱动所述张紧装置在所述柔性仿形治具厚度的垂直方向上运动。
可选地，在本公开实施例提供的上述曲面贴合装置中，还包括：第二伺服马达，被配置为驱动所述承载膜朝向与所述张紧装置的运动方向相反的方向行进。
可选地，在本公开实施例提供的上述曲面贴合装置中，还包括：上治具，被配置为固定所述曲面盖板。
可选地，在本公开实施例提供的上述曲面贴合装置中，所述曲面盖板包括主体部以及位于所述主体部两端的两个弯折部；
所述上治具包括第一部分以及位于所述第一部分两端的两个第二部分；所述第一部分与所述曲面板的主体部形状相适配，所述两个第二部分分别与 所述保护盖板的两个弯折部形状相适配；所述第一部分分别与所述两个第二部分可拆卸地连接。
可选地，在本公开实施例提供的上述曲面贴合装置中，还包括：下治具，被配置为固定所述柔性仿形治具。
本公开实施例还提供了一种采用上述任一项所述的贴合装置进行贴合的曲面贴合方法，包括：
驱动张紧装置挤压承载膜使其朝向柔性仿形治具弯曲，以带动柔性面板随着所述承载膜弯曲，实现所述柔性面板与所述柔性仿形治具所含压合面的仿形；
驱动所述柔性仿形治具朝向曲面盖板运动，以带动所述承载膜和所述柔性面板进入所述曲面盖板的开口后，使得所述柔性面板的非弯折区与所述曲面盖板的非弯折区贴合；
持续驱动所述柔性仿形治具朝向所述曲面盖板运动，以带动所述承载膜和所述柔性面板的两端发生弯曲形变，使得所述柔性基板的弯折区与所述曲面盖板的弯折区贴合；
驱动所述柔性仿形治具远离所述曲面盖板运动；
将所述承载膜与所述柔性面板进行剥离。
附图说明
图1为相关技术中曲面贴合装置的结构示意图；
图2为本公开实施例提供的曲面贴合装置的结构示意图；
图3为本公开实施例提供的柔性仿形治具的结构示意图；
图4为本公开实施例提供的180°倒扣式曲面盖板的结构示意图；
图5为本公开实施例提供的曲面贴合方法的流程图。
具体实施方式
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公 开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本公开内容。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其它实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“内”、“外”、“上”、“下”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
目前，OLED柔性面板在制备完成后，在其显示屏外侧均需贴设保护盖板，以对OLED柔性面板形成保护。为了实现OLED柔性面板的3D曲面显示，通常将OLED柔性面板的边缘端面设置为弧形面，如此，在显示时，其边缘区域的图像也可以正常显示，因此，保护盖板的边缘端面也通常设置为弧形面，以形成与具有弧形面的柔性面板相适配的曲面盖板。在本公开中“相适配”的意思是形状大致相同。
相关技术中，曲面盖板101和柔性面板102的贴合通常是通过图1所示的曲面贴合装置实现。具体地，在图1中柔性仿形治具103的压合面用于承载承载膜104，承载膜104用于贴附柔性面板102。贴合时，柔性仿形治具103向上靠近曲面盖板101移动，气缸105夹持承载膜104实现柔性面板102的仿形，即实现柔性面板102与压合面的形状相似，且压合面的形状与曲面盖板101的形状相同，从而使柔性面板102与曲面盖板101整体按照由中间平坦区至两侧弯折区接触的顺序实现贴合。
由图1可见，柔性仿形治具103在上移贴合的过程中，气缸105的固定 拉力不足容易导致柔性面板102在真空贴合前的仿形不足，从而使得柔性面板102提前接触曲面盖板101的边缘，致使贴合过程中柔性面板102绷的太紧或太松，绷的太松容易在柔性面板102与曲面盖板101之间产生气泡，绷的太紧容易导致柔性面板102破裂(Crack)损坏，严重影响其与曲面盖板101的贴合质量。
此外，在大弧度的曲面盖板101与柔性面板102贴合过程中，因柔性面板102不能很好地仿形，在弯折区贴合时就不可避免的会出现光学胶(OCA)与曲面盖板101边缘提前接触现象，一旦接触，无法有效分离再次贴合，导致弯折区贴合不完全，产生气泡/褶皱等不良问题。
针对相关技术中存在的上述问题，本公开实施例提供了一种曲面贴合装置，如图2所示，包括：柔性仿形治具103，柔性仿形治具103包括：压合面103'，压合面103'具有与曲面盖板101相适配的形状，即压合面103'的上表面与曲面盖板101的下表面形状尺寸大致相同；
承载膜104，位于压合面103'与柔性面板102之间，并延伸至压合面103'的两侧；承载膜104被配置为贴附柔性面板102；
张紧装置201，与延伸至压合面103'两侧的承载膜104接触，张紧装置201被配置为将承载膜104张紧，以使承载膜104带动柔性面板102与压合面103'仿形。
在本公开实施例提供的上述曲面贴合装置中，通过在柔性仿形治具103的压合面103'两侧增加张紧装置201，使得在贴合过程中承载膜104受张紧装置201在X方向的挤压而朝向柔性仿形治具103弯曲变形，以带动承载膜104上的柔性面板102实现与柔性仿形治具103的压合面103'的良好甚至完全仿形。即在贴合前很好地完成了柔性面板102和与柔性仿形治具103的压合面103'的仿形，从而避免了柔性面板102侧边和曲面盖板101提前接触造成气泡和裂纹等不良，提高了贴合良率。
具体地，可通过驱动元件(例如第一伺服马达202)驱动张紧装置201在柔性仿形治具103厚度的垂直方向(即X方向)上运动。曲面盖板101可以 为玻璃盖板，上治具106通过真空吸附结合短边夹持的方式固定曲面盖板101。下治具107上具有与柔性仿形治具103的下端面适配的仿形槽，以通过仿形槽固定柔性仿形治具103。曲面盖板101与柔性面板102之间通过光学胶(OCA)实现粘性贴合，一般可以在柔性面板102进入上治具106的容纳空间之前，在柔性面板102上涂敷光学胶，然后当柔性面板102在下治具107的推力和上治具106的压力共同作用下与曲面盖板101接触时即能够实现两者的贴合。具体地，下治具107可通过液压柱提供动力以实现上下平移。
具体地，在完成柔性面板102和与柔性仿形治具103的压合面103'的仿形后，可驱动下治具106带动柔性面板102上移至距离曲面盖板101内侧区域1mm处，然后降低下治具106的移动速度，使得曲面盖板101内侧平坦区和光学胶按照由中间至两端接触的顺序，完成平坦区的贴合过程；然后驱动下治具106继续向上运动，以增加贴合压力，压合面103'向左右两边发生与曲面盖板101的弯折区相适配的形变，张紧装置201挤压承载膜104，以带动柔性面板102向左右两边完成与压合面103'的仿形，实现左右弯折部分的贴合。
可选地，在本公开实施例提供的上述曲面贴合装置中，张紧装置201可以为压附滚轮、弹簧、张紧器等可在X方向上进行来回移动的元件。另外，在本公开中张紧装置201的数量不限。具体地，图2中仅示例性地给出了分居柔性仿形治具103两侧的两个张紧装置201。柔性仿形治具103可由橡胶、硅胶等具有高疲劳强度、高回弹特性的材料制作而成。
可选地，在本公开实施例提供的上述曲面贴合装置中，如图3所示，压合面103'中弯折部分的弧度λ为90°～180°。由于压合面103'具有与曲面盖板101相适配的形状，因此，曲面盖板101的弯折部分弧度也为90°～180°，以实现大弧度曲面盖板101与柔性面板102的贴合。具体地，在曲面盖板101的弯折部分弧度为90°～180°的情况下，柔性面板102的在X向上的尺寸可略小于曲面盖板101开口的长度，这样可以使得柔性面板102能够进入曲面盖板101的容纳空间内，避免光学胶提前接触曲面盖板101，并且有利于柔性 面板102与曲面盖板101能够良好的匹配贴合。另外，为便于实现上治具106对大角度(例如两端180度弯折形状的倒扣式)曲面盖板101的夹持固定，如图4所示，可设计上治具106包括第一部分1061以及位于第一部分1061两端的两个第二部分1062，且第一部分1061分别与两个第二部分1062可拆卸地连接。
具体地，如图4所示，曲面盖板101的主体部1011可以包括平坦区D及分别位于平坦区D两端的两个1/4圆弧弯曲区R1；曲面盖板101的副体部1012包括1/4圆弧弯曲区R2；副体部1012的1/4圆弧弯曲区R2与主体部1011的1/4圆弧弯曲区R1连接形成主体部1011与副体部1012之间180度弯折。换句话说，曲面盖板101呈两端180度弯折的形状，弯曲部分呈半圆弧状，主体部1011与副体部1012将半圆弧状的弯曲部分平均分割，各具有1/4圆弧弯曲区。相应地，上治具106的第一部分1061以及两个第二部分1062与曲面盖板101的主体部1011和两个副体部1012设置相同。
具体可通过以下方式将曲面盖板101固定于上治具106形成的容纳空间内：首先将上治具106的两个第二部分1062与第一部分1061拆卸分离；再将曲面盖板101的主体部1011与上治具106的第一部分1061接触匹配；最后将上治具106的两个第二部分1062分别罩在曲面盖板101的两个副体部1012上，并将两个第二部分1062分别固定安装于第一部分1061上。
可选地，在本公开实施例提供的上述曲面贴合装置中，如图2所示，在柔性仿形治具103所在平面的垂直方向(即图2所示的Z方向)上，柔性仿形治具103的厚度h大于50mm。相关技术中，柔性仿形治具103的厚度h一般为16mm，在本公开中通过增加柔性仿形治具103的厚度h，来提升柔性仿形治具103的变形量，利于实现张紧装置201对承载膜104的压附仿形。
可选地，在本公开实施例提供的上述曲面贴合装置中，如图2所示，柔性仿形治具103还包括：与压合面103'的端面接触的内凹面。采用上部外扩、中腰收缩的设计，可确保柔性仿形治具103受压后，压合面103'向左右两边 挤压并带动承载膜104和柔性面板102的弯折部分完成与曲面盖板101的弯折部分的仿形贴合。
可选地，在本公开实施例提供的上述曲面贴合装置中，如图3所示，内凹面的弧度δ为80°～160°，例如具体可以为80°、90°、100°、110°、120°、130°、140°、150°、160°等。如此，便于张紧装置201对承载膜104施加挤压应力，使得承载膜104可以更好地带动柔性面板102实现与压合面103'的仿形。
可选地，在本公开实施例提供的上述曲面贴合装置中，如图2所示，在柔性仿形治具103厚度h的垂直方向(即X方向)上，张紧装置201与内凹面的腰部共面设置。由于柔性仿形治具103在内凹面的腰部(即中间区域)的内凹幅度最大，因此将张紧装置201与内凹面的腰部设置在同一平面上，可使得张紧装置201在内凹方向(即X方向)上的行程最大，从而可更好地挤压承载膜104以带动柔性面板102完成与压合面103'的仿形。当然，在具体实施时，张紧装置201还可设置在与内凹面的腰部沿Z向的附近，在此不做具体限定。
可选地，在本公开实施例提供的上述曲面贴合装置中，在与柔性仿形治具103的厚度h垂直的方向(即X方向)上，内凹面与受张紧装置201挤压作用的承载膜104之间的距离小于0.5mm。理想状态下，承载膜104在张紧装置201的挤压作用下会与柔性仿形治具103的两侧内凹面零距离接触，以保证承载膜104带动柔性面板102实现与柔性仿形治具103的压合面103'的完美仿形效果。但在实际压附仿形过程中，一般还需要通过驱动元件(例如第二伺服马达203)沿X方向拉伸承载膜104，在承载膜104所受拉力的带动作用下，柔性面板102的两个端部即可以弯曲以与曲面盖板101的两个弯折部分匹配。示例性地，第二伺服马达203被配置为驱动承载膜104朝向与张紧装置201的运动方向相反的方向行进。由于该拉力的方向与张紧装置201的挤压应力的方向相反，因此，会在一定程度上使得内凹面与受张紧装置201 挤压作用的承载膜104之间具有一定的距离。综合考虑张紧装置201与第二伺服马达203的协同作用，在本公开中承载膜104在张紧装置201的挤压作用下与柔性仿形治具103的两侧内凹面之间的距离小于0.5mm的情况下，依然可以保证良好的仿形效果。
基于同一发明构思，本公开实施例提供了一种采用上述曲面贴合装置进行贴合的曲面贴合方法，由于该贴合方法解决问题的原理与上述曲面贴合装置解决问题的原理相似，因此，本发明实施例提供的该曲面贴合方法的实施可以参见本发明实施例提供的上述曲面贴合装置的实施，重复之处不再赘述。
具体地，本公开实施例提供的一种曲面贴合方法，如图5所示，具体可以包括以下步骤：
S501、驱动张紧装置挤压承载膜使其朝向柔性仿形治具弯曲，以带动柔性面板随着承载膜弯曲，实现柔性面板与柔性仿形治具所含压合面的仿形；
S502、驱动柔性仿形治具朝向曲面盖板运动，以带动承载膜和柔性面板进入曲面盖板的开口后，使得柔性面板的非弯折区与曲面盖板的非弯折区贴合；
S503、持续驱动柔性仿形治具朝向曲面盖板运动，以带动承载膜和柔性面板的两端发生弯曲形变，使得柔性基板的弯折区与曲面盖板的弯折区贴合；
S504、驱动柔性仿形治具远离曲面盖板运动；
S505、将承载膜与柔性面板进行剥离。
可以理解的是，当完成柔性面板102与曲面盖板101两者的贴合操作后，需要驱动柔性仿形治具离开上治具106的容纳空间，因柔性仿形治具自身很容易发生受力变形，在外力撤销之后又可恢复原状，因此，可以通过液压柱等控制下治具107向下移动，使得柔性仿形治具随着下治具107下移，在下移过程中，柔性仿形治具就会与承载膜104分开并从容纳空间的开口离开容纳空间。之后，一般还需要将承载膜104从柔性面板102上剥离。示例性的，承载膜104与柔性面板102接触的一侧可以采用UV减黏胶，通过紫外线照射即可以大大降低其粘性，从而可以很容易将承载膜104从柔性面板102上 剥离掉。
本公开实施例提供的上述曲面贴合装置及曲面贴合方法，包括：柔性仿形治具，柔性仿形治具包括：压合面，压合面具有与曲面盖板相适配的形状；承载膜，位于压合面与柔性面板之间，并延伸至压合面的两侧；承载膜被配置为贴附柔性面板；张紧装置，与延伸至压合面两侧的承载膜接触，张紧装置被配置为将承载膜张紧，以使承载膜与压合面仿形。通过在柔性仿形治具的压合面两侧增加张紧装置，使得在贴合过程中承载膜受张紧装置在X方向的挤压而朝向柔性仿形治具弯曲变形，承载膜上的柔性面板会随着承载膜一起完成与柔性仿形治具的压合面的仿形。即在贴合前完成了柔性面板和与柔性仿形治具的压合面的良好仿形，从而避免了柔性面板侧边和曲面盖板提前接触造成气泡和裂纹等不良，提高了贴合良率。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (14)

  1. 一种曲面贴合装置，用于实现曲面盖板与柔性面板的贴合，其中，包括：
    柔性仿形治具，所述柔性仿形治具包括：压合面，所述压合面具有与所述曲面盖板相适配的形状；
    承载膜，位于所述压合面与所述柔性面板之间，并延伸至所述压合面的两侧；所述承载膜被配置为贴附所述柔性面板；
    张紧装置，与延伸至所述压合面两侧的所述承载膜接触，所述张紧装置被配置为将所述承载膜张紧，以使所述承载膜与所述压合面仿形。
  2. 如权利要求1所述的曲面贴合装置，其中，所述压合面中弯折部分的弧度为90°～180°。
  3. 如权利要求1所述的曲面贴合装置，其中，在所述柔性仿形治具所在平面的垂直方向上，所述柔性仿形治具的厚度大于50mm。
  4. 如权利要求1所述的曲面贴合装置，其中，所述柔性仿形治具还包括：与所述压合面的端面连接的内凹面。
  5. 如权利要求4所述的曲面贴合装置，其中，所述内凹面的弧度为80°～160°。
  6. 如权利要求4所述的曲面贴合装置，其中，在所述柔性仿形治具厚度的垂直方向上，所述张紧装置与所述内凹面的腰部共面设置。
  7. 如权利要求4所述的曲面贴合装置，其中，在所述柔性仿形治具厚度的垂直方向上，所述内凹面与受所述张紧装置挤压作用的所述承载膜之间的距离小于0.5mm。
  8. 如权利要求1所述的曲面贴合装置，其中，所述张紧装置为压附滚轮。
  9. 如权利要求1～8任一项所述的曲面贴合装置，其中，还包括：第一伺服马达，被配置为驱动所述压附滚轮在所述柔性仿形治具厚度的垂直方向上运动。
  10. 如权利要求9所述的曲面贴合装置，其中，还包括：第二伺服马达，被配置为驱动所述承载膜朝向与所述压附滚轮的运动方向相反的方向行进。
  11. 如权利要求1～8任一项所述的曲面贴合装置，其中，还包括：上治具，被配置为固定所述曲面盖板。
  12. 如权利要求11所述的曲面贴合装置，其中，所述曲面盖板包括主体部以及位于所述主体部两端的两个弯折部；
    所述上治具包括第一部分以及位于所述第一部分两端的两个第二部分；所述第一部分与所述曲面板的主体部形状相适配，所述两个第二部分分别与所述保护盖板的两个弯折部形状相适配；所述第一部分分别与所述两个第二部分可拆卸地连接。
  13. 如权利要求1～8任一项所述的曲面贴合装置，其中，还包括：下治具，被配置为固定所述柔性仿形治具。
  14. 一种采用如权利要求1～13任一项所述贴合装置进行贴合的曲面贴合方法，其中，包括：
    驱动张紧装置挤压承载膜使其朝向柔性仿形治具弯曲，以带动柔性面板随着所述承载膜弯曲，实现所述柔性面板与所述柔性仿形治具所含压合面的仿形；
    驱动所述柔性仿形治具朝向曲面盖板运动，以带动所述承载膜和所述柔性面板进入所述曲面盖板的开口后，使得所述柔性面板的非弯折区与所述曲面盖板的非弯折区贴合；
    持续驱动所述柔性仿形治具朝向所述曲面盖板运动，以带动所述承载膜和所述柔性面板的两端发生弯曲形变，使得所述柔性基板的弯折区与所述曲面盖板的弯折区贴合；
    驱动所述柔性仿形治具远离所述曲面盖板运动；
    将所述承载膜与所述柔性面板进行剥离。
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