WO2021027098A1 - 柔性显示面板结构及制作方法 - Google Patents

柔性显示面板结构及制作方法 Download PDF

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Publication number
WO2021027098A1
WO2021027098A1 PCT/CN2019/115733 CN2019115733W WO2021027098A1 WO 2021027098 A1 WO2021027098 A1 WO 2021027098A1 CN 2019115733 W CN2019115733 W CN 2019115733W WO 2021027098 A1 WO2021027098 A1 WO 2021027098A1
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WIPO (PCT)
Prior art keywords
ocr
overflow
fluid
touch panel
quadrilateral
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Ceased
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PCT/CN2019/115733
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English (en)
French (fr)
Inventor
王芳
张卓
韩文
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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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Priority to US16/623,050 priority Critical patent/US11404663B2/en
Publication of WO2021027098A1 publication Critical patent/WO2021027098A1/zh
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/8722—Peripheral sealing arrangements, e.g. adhesives, sealants
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements

Definitions

  • the present invention relates to the field of display technology, and in particular to a flexible display panel structure and manufacturing method.
  • the flexible display panel can be expanded from a smaller volume to a larger display screen because it can achieve bending characteristics such as foldability and rollability, thus becoming the mainstream of the future display market.
  • the film layer used for bonding between the individual device stacks is limited by the modulus and bending performance of each film layer during the bending or curling process, which affects the stacking structure.
  • the degree of bending; on the other hand, each film layer has different degrees of stretching and compression due to the different positions of the laminated structure. Areas with larger bending stress usually have the risk of peeling of the panel laminated structure and cracking between the layers. This affects the development of flexible display panels in the application field.
  • Each film layer of the flexible display panel is stretched and compressed to different degrees due to different stacking positions, and areas with greater bending stress usually have the risk of peeling of the panel stacking and cracking between the film layers.
  • each functional film layer is squeezed or stretched to different degrees during the bending process, and the larger normal stress or shear stress causes the panel to increase cracking and peeling. risk.
  • the present invention provides a flexible display panel structure, including a cover plate, a touch panel, and an organic light emitting diode (Organic Light-Emitting Diode, OLED) device and a backplane, wherein a first quadrilateral anti-overflow barrier and a first optical transparent resin (Optical) are provided between the cover plate and the touch panel.
  • Clear Resin, OCR) fluid adhesive layer fills the space formed by the first quadrilateral overflow barrier and the cover plate, and the first OCR fluid adhesive layer connects the cover plate and the touch panel Glued together.
  • the first quadrilateral anti-overflow bar is a flat quadrilateral anti-overflow bar
  • a second quadrilateral anti-overflow bar is also included between the touch panel and the OLED device.
  • An overflow bar and a second OCR fluid adhesive layer cover the space formed by the second quadrilateral overflow barrier and the touch panel.
  • the second OCR fluid adhesive layer connects the touch panel and the touch panel.
  • the OLED devices are glued together.
  • the area of the first OCR fluid glue layer is greater than the area of the second OCR fluid glue layer, and the thickness of the second OCR fluid glue layer is greater than that of the first OCR fluid glue layer. The thickness of the OCR fluid glue layer.
  • an optically transparent adhesive is further included between the OLED device and the backplane.
  • Clear Adhesive, OCA glues the OLED device and the backplane together.
  • first quadrilateral overflow barrier and the second quadrilateral overflow barrier are composed of OCR fluid glue.
  • the back plate is a thin metal sheet.
  • the thickness of the OCA is 10 to 20 microns.
  • the thickness of the first OCR fluid glue layer is 3 to 5 microns.
  • the present invention also provides a manufacturing method of a flexible display panel structure, including the following steps:
  • Step S1 provide a cover plate
  • Step S2 Print the anti-overflow bar, print the anti-overflow bar by inkjet printing on the cover plate, and the anti-overflow bar is OCR fluid glue;
  • Step S3 pre-curing, through ultraviolet light (Ultraviolet Rays, UV) light irradiates the anti-overflow fence, and pre-cures the OCR fluid glue on the cover plate;
  • ultraviolet light Ultraviolet Rays, UV
  • Step S4 bonding the touch panel, bonding the touch panel above the cover plate with the pre-cured OCR fluid glue
  • Step S5 printing an anti-overflow bar, and printing the anti-overflow bar on the touch panel by inkjet printing, and the anti-overflow bar is made of OCR fluid glue;
  • Step S6 pre-curing, irradiating the anti-overflow bar on the touch panel with UV light, and pre-curing the OCR fluid glue on the touch panel;
  • Step S7 bonding the OLED device, and bonding the OLED device above the touch panel with the pre-cured OCR fluid glue.
  • the enclosed space formed between the overflow barrier and the cover in the step S2 has a first opening
  • the overflow barrier in the step S5 is The enclosed space formed between the touch panels has a second opening.
  • the step S6 is pre-cured, it further includes using UV light to treat the OCR fluid glue on the cover plate and the touch panel
  • the OCR fluid glue is subjected to secondary curing, and then, an injection method is used to form a first OCR fluid glue layer through the first opening.
  • a second OCR fluid glue layer is formed in the space and through the second opening in the enclosed space formed between the overflow barrier formed in step S5 and the touch panel, and then OCR is used as a sealant
  • the first opening and the second opening are sealed, and the sealant is cured by UV.
  • the step S3 after the step S3 is pre-cured, it further includes forming a first OCR fluid glue layer to form a fence between the overflow barrier formed in the step S2 and the cover plate.
  • the method further includes forming a second OCR fluid glue layer in the enclosed space formed between the overflow barrier formed in the step S5 and the touch panel.
  • step S6 after the step S6 is pre-cured, it further comprises using UV light to apply UV light to the OCR fluid glue formed in the step S2 and the OCR fluid glue formed in the step S5
  • the secondary curing is performed, and the OCR fluid glue formed in the step S2 and the OCR fluid glue formed in the step S5 are quadrangular.
  • the OLED device in the step S7 further includes a back plate, and the back plate adheres the back plate and the OLED device together through OCA.
  • the back plate is a stainless steel sheet metal.
  • step S6 after the step S6 is pre-cured, it further includes applying UV light to the OCR fluid glue on the cover plate and the OCR fluid on the touch panel.
  • the glue is subjected to secondary curing, and then, the first OCR fluid glue layer is formed by the dropping method in the enclosed space formed between the overflow barrier and the cover formed in the step S2, and in the enclosed space formed in the step S5 In the enclosed space formed between the overflow barrier and the touch panel.
  • the present invention also provides a flexible display panel structure, including a cover plate, a touch panel, and an organic light-emitting diode (Organic Light-Emitting Diode, OLED) device, and a backplane, wherein a first quadrilateral overflow barrier and a first optical transparent resin (Optical Clear Resin, OCR) fluid adhesive layer fills the space formed by the first quadrilateral overflow barrier and the cover plate, and the first OCR fluid adhesive layer connects the cover plate and the touch panel Glued together, wherein the first quadrilateral overflow barrier is a flat quadrilateral overflow barrier, and the touch panel and the OLED device further include a second quadrilateral overflow barrier, and a second quadrilateral overflow barrier.
  • the OCR fluid adhesive layer fills the space formed by the second quadrilateral overflow barrier and the touch panel, and the second OCR fluid adhesive layer bonds the touch panel and the OLED device to together.
  • the area of the first OCR fluid glue layer is greater than the area of the second OCR fluid glue layer, and the thickness of the second OCR fluid glue layer is greater than that of the first OCR fluid glue layer. The thickness of the OCR fluid glue layer.
  • an optically transparent adhesive is further included between the OLED device and the backplane.
  • Clear Adhesive, OCA glues the OLED device and the backplane together.
  • the first quadrilateral overflow barrier and the second quadrilateral overflow barrier are composed of OCR fluid glue, and the thickness of the OCA is 10 to 20 microns .
  • the thickness of the first OCR fluid glue layer is 3 to 5 microns.
  • the OCR fluid glue of the present invention is used as an anti-overflow barrier, and the flexible display panel structure adopts a trapezoidal stacked structure.
  • an ultra-thin glue layer can be realized, or adjusted according to the requirements of the laminated position
  • the OCR fluid glue anti-overflow barrier and the glue layer are of any desired thickness; on the other hand, the flow characteristics of the OCR fluid glue can increase the displacement between the upper and lower membrane layers, reduce the shear stress, and reduce the risk of peeling between the membrane layers .
  • FIG. 1 is a schematic structural diagram of a flexible display panel provided by an embodiment of the present invention
  • FIG. 2 is a schematic diagram of the structure of the anti-overflow fence in the flexible display panel structure provided by an embodiment of the present invention
  • Fig. 3 is a schematic diagram of the structure of an overflow barrier provided by another embodiment of the present invention.
  • FIG. 4 is a schematic top view of an overflow prevention fence structure provided by an embodiment of the present invention.
  • FIG. 5 is a schematic top view of an overflow barrier structure provided by another embodiment of the present invention.
  • FIG. 6 is a flowchart of a manufacturing method of a flexible display panel structure provided by an embodiment of the present invention.
  • each functional film layer of the existing flexible display panel is squeezed or stretched to different degrees during the bending process, the panel increases the risk of cracking and peeling, and proposes a flexible display panel structure and manufacturing process. Helps reduce the risk of panel cracking and peeling.
  • the present invention will be described in detail below in conjunction with specific embodiments.
  • FIG. 1 is a schematic diagram of a flexible display panel structure provided by an embodiment of the present invention.
  • the flexible display panel structure includes a cover plate 10, a touch panel 20, and an organic light emitting diode (Organic Light-Emitting Diode, OLED) device 30, and a back plate 40, wherein a first quadrilateral anti-overflow barrier 15 and a first optical clear resin (Optical Clear Resin, OCR)
  • OCR Optical Clear Resin
  • the touch panel 10 and the OLED device 30 further include a second quadrilateral overflow barrier 25 and a second OCR fluid glue layer 26 covering the second quadrilateral overflow barrier 25 In the space formed with the touch panel 20, the second OCR fluid glue layer 26 bonds the touch panel 20 and the OLED device 30 together.
  • the first quadrilateral anti-overflow fence and the second quadrilateral anti-overflow fence are composed of OCR fluid glue.
  • OCR fluid glue with a transmittance greater than 95% and good optical performance is selected. .
  • the ladder-shaped stacking structure is selected in the stacking design, that is, the length of the upper film layer is slightly larger than that of the lower film layer, so that the edges of the panel are still relatively neat after bending; therefore, the first OCR fluid
  • the length of the adhesive layer 16 is greater than the length of the second OCR fluid adhesive layer 26, that is, the area of the first OCR fluid adhesive layer 16 is greater than the area of the second OCR fluid adhesive layer 26.
  • the thickness H2 of the second OCR fluid glue layer 26 is greater than the thickness H1 of the first OCR fluid glue layer 16.
  • the thickness H1 of the first OCR fluid adhesive layer 16 close to the cover plate 10 is relatively thin, about 3 micrometers ( ⁇ m) to 5 micrometers, which is beneficial to improve the hardness and scratch resistance of the flexible display panel.
  • a second quadrilateral overflow barrier 25 and a second OCR fluid glue layer 26 are provided on the stack containing the touch panel 20 to cover the second quadrilateral overflow barrier 25 and In the space formed by the touch panel 20, the second OCR fluid glue layer 26 is close to the OLED device 30, and the thickness H2 of the second OCR fluid glue layer 26 is much thicker than the thickness H1 of the first OCR fluid glue layer 16, which can be reduced
  • the OLED device 30 can also play a certain buffering effect against external shocks.
  • the OLED device 30 and the back plate 40 further include an optically transparent adhesive (Optically Clear Adhesive (OCA) 36 bonds the OLED device 30 and the back plate 40 together, and the thickness of the optically transparent adhesive 36 is 10 to 20 microns.
  • OCA optically Clear Adhesive
  • the backplane 40 can directly adopt a stainless steel sheet with a thickness of about 30 microns in the stacked design, which can simultaneously play the role of back support and facilitate the structure of the flexible display panel after bending Restoring force reduces the probability of wave formation.
  • an OCA 36 with a thickness of about 15 microns is selected to make the back plate 40 and the OLED device 30 more closely attached.
  • FIG. 2 is a schematic diagram of an overflow barrier structure in a flexible display panel structure provided by an embodiment of the present invention
  • FIG. 3 is a schematic diagram of an overflow barrier structure provided by another embodiment of the present invention.
  • Figure 2 shows that the quadrilateral overflow barrier is a single-layer structure, that is, on the cover 10 or the touch panel 20, only a circle of quadrilateral overflow barriers is set above
  • Figure 3 shows that the quadrilateral overflow barrier is a double-layer structure , That is, on the cover 10 or the touch panel 20, two circles of quadrilateral overflow prevention bars 55 are arranged above.
  • Figures 2 and 3 illustrate the relative positional relationship of the number of quadrilateral overflow barriers, and the present invention is not limited thereto.
  • FIG. 4 is a schematic top view of an overflow barrier structure provided by an embodiment of the present invention
  • FIG. 5 is another embodiment.
  • FIG. 6 is a flowchart of a manufacturing method of a flexible display panel structure provided by an embodiment of the present invention.
  • the manufacturing method of the flexible display panel structure includes the following steps: step S1, providing a cover plate 10; step S2, printing the anti-overflow fence 15, and performing inkjet printing on the cover plate 10.
  • Print the anti-overflow bar 15, the anti-overflow bar 15 is OCR fluid glue;
  • step S3 pre-curing, through ultraviolet light (Ultraviolet Rays, UV) light irradiates the anti-overflow bar 15, pre-curing OCR fluid glue on the cover plate 10;
  • step S4 bonding the touch panel 20, bonding the touch panel 20 to the cover plate 10 with pre-curing OCR fluid glue
  • Step S5 print the overflow prevention bar 25, print the overflow prevention bar 25 by inkjet printing on the touch panel 20, the overflow prevention bar 25 is OCR fluid glue;
  • the overflow prevention bar 25 on the control panel 20, the pre-cured OCR fluid glue is on the touch panel 20; and step S7, the OLED device 30 is attached, and the
  • step S6 after pre-curing in step S6, it further includes using UV light to perform secondary curing on the OCR fluid glue formed in step S2 and the OCR fluid glue formed in step S5, and the OCR fluid glue formed in step S2 and The OCR fluid glue formed in step S5 is quadrilateral.
  • step S3 after step S3 is pre-cured, it further includes forming a first OCR fluid glue layer 16 in the enclosed space formed between the overflow barrier 15 formed in step S2 and the cover 10
  • step S6 after step S6 is pre-cured, it further includes forming a second OCR fluid glue layer 26 in the enclosed space formed between the overflow prevention bar 25 formed in step S5 and the touch panel 20.
  • the overflow prevention bar when printing the overflow prevention bar in step S2 and step S5, the overflow prevention bar has an opening.
  • the positional relationship between the overflow prevention bar 75 and the substrate 50 is whether there is a side above the substrate 50.
  • the substrate 50 can be the cover 10 or the touch panel 20 in FIG. 1, and the anti-overflow bar 75 can be the corresponding anti-overflow bar 15 or 25. That is, the enclosed space formed between the overflow barrier 15 and the cover 10 in step S2 has a first opening, and the overflow barrier 15 is shown in FIG.
  • step S2 and step S5 are used to print the anti-overflow bar, if the anti-overflow bar has an opening, after pre-curing in step S6, it also includes applying UV light to the OCR fluid glue 15 on the cover 10 and the OCR on the touch panel 20 The fluid glue 25 undergoes secondary curing.
  • the first OCR fluid glue layer 16 is formed through the first opening by the injection method in the enclosed space formed between the overflow barrier 15 formed in step S2 and the cover plate 10, and through the second The opening forms the second OCR fluid glue layer 26 in the enclosed space formed between the overflow prevention fence 25 formed in step S5 and the touch panel 20.
  • OCR is used as a sealant to seal the first opening and the second opening, and UV Curing frame glue.
  • the OLED device 30 in step S7 further includes a back plate 40, and the back plate 40 bonds the back plate 40 and the OLED device 30 together through the OCA 36.
  • OCR fluid glue with a transmittance greater than 95% and good optical performance is selected as the anti-overflow barrier, and the flexible display panel structure adopts a trapezoidal stack structure, so that the four sides of the device and the device stack have quadrangular OCR fluid glue Anti-overflow fence, as a fixed OCR fluid glue layer.
  • an ultra-thin glue layer can be realized, that is, the thickness is between 3 microns and 5 microns, or adjusted according to the requirements of the laminated position
  • the OCR fluid glue anti-overflow barrier and the glue layer are of any desired thickness; on the other hand, the flow characteristics of the OCR fluid glue can increase the displacement between the upper and lower membrane layers, reduce the shear stress, and reduce the risk of peeling between the membrane layers .

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Abstract

一种柔性显示面板结构及制作方法。柔性显示面板结构包括依次设置的盖板、触控面板、有机发光二极管器件、以及背板，其中盖板与触控面板之间具有第一光学透明树酯流体胶层，第一光学透明树酯流体胶层将盖板与触控面板粘合在一起，从而有利于降低面板破裂及剥落风险。

Description

柔性显示面板结构及制作方法 技术领域
本发明涉及显示技术领域，尤其涉及一种柔性显示面板结构及制作方法。
 背景技术
柔性显示面板因可实现可折叠及可卷曲等弯曲特性，可以从较小的体积展开成为更大的显示屏幕，从而成为未来显示市场的主流。但是，柔性显示面板结构中各别器件叠构之间用以结合的膜层，在弯折或卷曲的过程中，一方面受到各膜层模量和弯折性能的限制，影响到叠构的可弯折程度；另一方面，各个膜层因所在叠构位置不同而出现不同程度的拉伸和压缩，弯折应力较大的区域通常会有面板叠构剥落及膜层间破裂的风险，从而影响柔性显示面板在应用领域的发展。
 技术问题
柔性显示面板各个膜层因所在叠构位置不同而出现不同程度的拉伸和压缩，弯折应力较大的区域通常会有面板叠构剥落及膜层间破裂的风险。
 技术解决方案
在制备可折叠及可卷曲显示器时，必须保证面板叠构中所用材料具有一定的弯折性能。但由于各膜层材料的模量大不相同，在弯折过程中，各功能膜层受到不同程度的挤压或拉伸，较大的法向应力或剪切应力使得面板增加了破裂及剥落风险。
为解决上述问题，本发明提供一种柔性显示面板结构，包括依次设置的盖板、触控面板、有机发光二极管(Organic Light-Emitting Diode, OLED)器件、以及背板，其中，所述盖板与所述触控面板之间具有第一四边形防溢栏、以及第一光学透明树酯(Optical Clear Resin, OCR)流体胶层填覆于所述第一四边形防溢栏与所述盖板形成的空间中，所述第一OCR流体胶层将所述盖板与所述触控面板粘合在一起。
在本发明的至少一种实施例中，其中所述第一四边形防溢栏为一平形四边形防溢栏，所述触控面板与所述OLED器件之间还包括第二四边形防溢栏、以及第二OCR流体胶层填覆于所述第二四边形防溢栏与所述触控面板形成的空间中，所述第二OCR流体胶层将所述触控面板与所述OLED器件粘合在一起。
在本发明的至少一种实施例中，其中所述第一OCR流体胶层的面积大于所述第二OCR流体胶层的面积，且所述第二OCR流体胶层的厚度大于所述第一OCR流体胶层的厚度。
在本发明的至少一种实施例中，其中所述OLED器件与所述背板之间还包括光学透明粘结剂(Optically Clear Adhesive, OCA)将所述OLED器件与所述背板粘合在一起。
在本发明的至少一种实施例中，其中所述第一四边形防溢栏、以及第二四边形防溢栏为OCR流体胶所组成。
在本发明的至少一种实施例中，其中所述背板为金属薄片。
在本发明的至少一种实施例中，其中所述OCA的厚度为10微米至20微米。
在本发明的至少一种实施例中，其中所述第一OCR流体胶层的厚度为3微米至5微米。
本发明还提供一种柔性显示面板结构的制作方法，包括如下步骤：
步骤S1、提供盖板；
步骤S2、打印防溢栏，在所述盖板上通过喷墨打印方式进行所述打印防溢栏，所述防溢栏为OCR流体胶；
步骤S3、预固化，通过紫外光线(Ultraviolet Rays，UV)光照射所述防溢栏，预固化所述OCR流体胶在所述盖板上；
步骤S4、贴合触控面板，将所述触控面板贴合在具有预固化所述OCR流体胶的所述盖板的上方；
步骤S5、打印防溢栏，在所述触控面板上通过喷墨打印方式进行所述打印防溢栏，所述防溢栏为OCR流体胶；
步骤S6、预固化，通过UV光照射所述触控面板上的所述防溢栏，预固化所述OCR流体胶在所述触控面板上；以及
步骤S7、贴合OLED器件，将所述OLED器件贴合在具有预固化所述OCR流体胶的所述触控面板的上方。
在本发明的至少一种实施例中，所述步骤S2的所述防溢栏与所述盖板间形成的围合空间中具有第一开口，所述步骤S5的所述防溢栏与所述触控面板间形成的围合空间中具有第二开口，在所述步骤S6预固化之后，还包括使用UV光对所述盖板上的所述OCR流体胶及所述触控面板上的所述OCR流体胶进行二次固化，之后，采用注入法经由所述第一开口形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中、及经由所述第二开口形成第二OCR流体胶层于所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中，接着，使用OCR作为框胶密封所述第一开口与所述第二开口、并使用UV固化所述框胶。
在本发明的至少一种实施例中，其中所述步骤S3预固化之后，还包括形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中，以及，所述步骤S6预固化之后，还包括形成第二OCR流体胶层于所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中。
在本发明的至少一种实施例中，其中在所述步骤S6预固化之后，还包括使用UV光对所述步骤S2形成的所述OCR流体胶及所述步骤S5形成的所述OCR流体胶进行二次固化，且所述步骤S2形成的所述OCR流体胶及所述步骤S5形成的所述OCR流体胶为四边形。
在本发明的至少一种实施例中，其中所述步骤S7的所述OLED器件还包括背板，所述背板通过OCA将所述背板与所述OLED器件粘合在一起。
在本发明的至少一种实施例中，其中所述背板为不锈钢金属薄片。
在本发明的至少一种实施例中，其中在所述步骤S6预固化之后，还包括使用UV光对所述盖板上的所述OCR流体胶及所述触控面板上的所述OCR流体胶进行二次固化，之后，采用滴加法形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中、及所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中。
本发明还提供一种柔性显示面板结构，包括依次设置的盖板、触控面板、有机发光二极管(Organic Light-Emitting Diode, OLED)器件、以及背板，其中所述盖板与所述触控面板之间具有第一四边形防溢栏、以及第一光学透明树酯(Optical Clear Resin, OCR)流体胶层填覆于所述第一四边形防溢栏与所述盖板形成的空间中，所述第一OCR流体胶层将所述盖板与所述触控面板粘合在一起，其中所述第一四边形防溢栏为一平形四边形防溢栏，所述触控面板与所述OLED器件之间还包括第二四边形防溢栏、以及第二OCR流体胶层填覆于所述第二四边形防溢栏与所述触控面板形成的空间中，所述第二OCR流体胶层将所述触控面板与所述OLED器件粘合在一起。
在本发明的至少一种实施例中，其中所述第一OCR流体胶层的面积大于所述第二OCR流体胶层的面积，且所述第二OCR流体胶层的厚度大于所述第一OCR流体胶层的厚度。
在本发明的至少一种实施例中，其中所述OLED器件与所述背板之间还包括光学透明粘结剂(Optically Clear Adhesive, OCA)将所述OLED器件与所述背板粘合在一起。
在本发明的至少一种实施例中，其中所述第一四边形防溢栏、以及第二四边形防溢栏为OCR流体胶所组成，所述OCA的厚度为10微米至20微米。
在本发明的至少一种实施例中，其中所述第一OCR流体胶层的厚度为3微米至5微米。
 有益效果
通过本发明的OCR流体胶当做防溢栏，并且柔性显示面板结构采用梯形叠构，如此，由于OCR流体胶层流体的优势，一方面可以实现超薄胶层，或根据叠层位置需要，调节OCR流体胶防溢栏和胶层为任意所需厚度；另一方面，通过OCR流体胶的流动特性，可以增加上下膜层间的错动，减小剪切应力，减缓膜层间剥落的风险。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例提供的柔性显示面板结构示意图；
图2为本发明实施例提供的柔性显示面板结构中的防溢栏结构示意图；
图3为本发明另一实施例提供的防溢栏结构示意图；
图4为本发明实施例提供的防溢栏结构俯视示意图；
图5为本发明另一实施例提供的防溢栏结构俯视示意图；以及
图6为本发明实施例提供的柔性显示面板结构的制作方法流程图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
本发明针对现有的柔性显示面板在弯折过程中，各功能膜层受到不同程度的挤压或拉伸，使得面板增加了破裂及剥落风险，提出一种柔性显示面板结构与制程工序，从而有利于降低面板破裂及剥落风险。下面结合具体实施例，对本发明进行详细说明。
请参考图1，图1为本发明实施例提供的柔性显示面板结构示意图，所述柔性显示面板结构包括依次设置的盖板10、触控面板20、有机发光二极管(Organic Light-Emitting Diode, OLED)器件30、以及背板40，其中，盖板10与触控面板20之间具有第一四边形防溢栏15、以及第一光学透明树酯(Optical Clear Resin, OCR)流体胶层16填覆于第一四边形防溢栏15与盖板10形成的空间中，第一OCR流体胶层16将盖板10与触控面板20粘合在一起。
在本发明一实施例中，触控面板10与OLED器件30之间还包括第二四边形防溢栏25、以及第二OCR流体胶层26填覆于第二四边形防溢栏25与触控面板20形成的空间中，第二OCR流体胶层26将触控面板20与OLED器件30粘合在一起。
在本发明一实施例中，第一四边形防溢栏以及第二四边形防溢栏为OCR流体胶所组成，优选地，选用透过率大于95%、光学性能良好的OCR流体胶。
所述柔性显示面板结构，在叠构设计上选择梯形叠构，即上层膜层的长度略大于下层膜层，从而有利于面板在弯折之后，边缘处仍较整齐；所以，第一OCR流体胶层16的长度大于第二OCR流体胶层26的长度，也就是第一OCR流体胶层16的面积大于第二OCR流体胶层26的面积。另一方面，在梯形叠构考量下，优选地，第二OCR流体胶层26的厚度H2大于第一OCR流体胶层16的厚度H1。接近盖板10的第一OCR流体胶层16的厚度H1较薄，约为3微米(μm)至5微米，有利于提升柔性显示面板的硬度及耐刮擦性能。贴合触控面板20后，在含有触控面板20的叠层上设置第二四边形防溢栏25、以及第二OCR流体胶层26填覆于第二四边形防溢栏25与触控面板20形成的空间中，第二OCR流体胶层26靠近OLED器件30，第二OCR流体胶层26的厚度H2远厚于第一OCR流体胶层16的厚度H1，如此可以达到减小剪切应力的同时，对OLED器件30也能起到一定抵抗外部冲击的缓冲作用。
在本发明一实施例中，OLED器件30与背板40之间还包括光学透明粘结剂(Optically Clear Adhesive, OCA)36将OLED器件30与背板40粘合在一起，光学透明粘结剂36的厚度为10微米至20微米。由于OCR流体胶层较软，在叠构设计中背板40可以直接采用厚度约为30微米的不锈钢金属薄片，如此可以同时起到背部支撑的作用，又有利于弯折后的柔性显示面板结构恢复力，减小波状的产生机率。其中，金属薄片与OLED器件30中的阵列基板贴合时，选用厚度约为15微米左右的OCA36，使背板40与OLED器件30贴合更为紧密。
请参考图2和图3，图2为本发明实施例提供的柔性显示面板结构中的防溢栏结构示意图，图3为本发明另一实施例提供的防溢栏结构示意图。其中，图2显示四边形防溢栏为单层结构，也就是在盖板10，或触控面板20，上方只设置一圈四边形防溢栏；而图3则显示四边形防溢栏为双层结构，也就是在盖板10，或触控面板20，上方设置两圈四边形防溢栏55。图2、图3为举例说明四边形防溢栏的数量其相对设置的位置关系，本发明不以此为限。
本发明还提供一种柔性显示面板结构的制作方法，请同时参考图4、图5和图6，图4为本发明实施例提供的防溢栏结构俯视示意图、图5为另一实施例的防溢栏结构俯视示意图，图6为本发明实施例提供的柔性显示面板结构的制作方法流程图。
请参考图6并对照图1，所述柔性显示面板结构的制作方法包括如下步骤：步骤S1、提供盖板10；步骤S2、打印防溢栏15，在盖板10上通过喷墨打印方式进行打印防溢栏15，防溢栏15为OCR流体胶；步骤S3、预固化，通过紫外光线(Ultraviolet Rays，UV)光照射防溢栏15，预固化OCR流体胶在盖板10上；步骤S4、贴合触控面板20，将触控面板20贴合在具有预固化OCR流体胶的盖板10的上方；步骤S5、打印防溢栏25，在触控面板20上通过喷墨打印方式进行打印防溢栏25，防溢栏25为OCR流体胶；步骤S6、预固化，通过UV光照射触控面板20上的防溢栏25，预固化OCR流体胶在触控面板20上；以及步骤S7、贴合OLED器件30，将OLED器件30贴合在具有预固化OCR流体胶的触控面板20的上方。
在本发明一实施例中，在步骤S6预固化之后，还包括使用UV光对步骤S2形成的OCR流体胶及步骤S5形成的OCR流体胶进行二次固化，且步骤S2形成的OCR流体胶及步骤S5形成的OCR流体胶为四边形。
在本发明一实施例中，如图4所示，步骤S3预固化之后，还包括形成第一OCR流体胶层16于步骤S2形成的防溢栏15与盖板10间形成的围合空间中，以及，步骤S6预固化之后，还包括形成第二OCR流体胶层26于步骤S5形成的防溢栏25与触控面板20间形成的围合空间中。
在本发明一实施例中，在步骤S2、步骤S5打印防溢栏时，防溢栏具有开口，如图5俯视图所示，防溢栏75与基板50的位置关系，基板50上方有一边没有防溢栏75；基板50可以是图1中的盖板10或触控面板20，而防溢栏75可以是对应的防溢栏15或防溢栏25。也就是，步骤S2的防溢栏15与盖板10间形成的围合空间中具有第一开口，防溢栏15如图5所示的防溢栏75；步骤S5的防溢栏25与触控面板20间形成的围合空间中具有第二开口，防溢栏25如图5所示的防溢栏75。当步骤S2、步骤S5打印防溢栏时，防溢栏若具有开口，则在步骤S6预固化之后，还包括使用UV光对盖板10上的OCR流体胶15及触控面板20上的OCR流体胶25进行二次固化，之后，采用注入法经由第一开口形成第一OCR流体胶层16于步骤S2形成的防溢栏15与盖板10间形成的围合空间中、及经由第二开口形成第二OCR流体胶层26于步骤S5形成的防溢栏25与触控面板20间形成的围合空间中，接着，使用OCR作为框胶密封第一开口与第二开口、并使用UV固化框胶。
在本发明一实施例中，步骤S7的OLED器件30还包括背板40，背板40通过OCA36将背板40与OLED器件30粘合在一起。
通过本发明选用透过率大于95%、光学性能良好的OCR流体胶当做防溢栏，并且柔性显示面板结构采用梯形叠构，使器件与器件叠构的四个边都具有四边形的OCR流体胶防溢栏，作为固定OCR流体胶层。如此，由于OCR流体胶层流体的优势，可通过注入或滴加等工艺手段，一方面可以实现超薄胶层，也就是厚度在3微米到5微米之间，或根据叠层位置需要，调节OCR流体胶防溢栏和胶层为任意所需厚度；另一方面，通过OCR流体胶的流动特性，可以增加上下膜层间的错动，减小剪切应力，减缓膜层间剥落的风险。
综上所述，虽然本发明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发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种柔性显示面板结构，包括依次设置的盖板、触控面板、有机发光二极管(Organic Light-Emitting Diode, OLED)器件、以及背板，其中所述盖板与所述触控面板之间具有第一四边形防溢栏、以及第一光学透明树酯(Optical Clear Resin, OCR)流体胶层填覆于所述第一四边形防溢栏与所述盖板形成的空间中，所述第一OCR流体胶层将所述盖板与所述触控面板粘合在一起。
  2. 如权利要求1所述的柔性显示面板结构，其中所述第一四边形防溢栏为一平形四边形防溢栏，所述触控面板与所述OLED器件之间还包括第二四边形防溢栏、以及第二OCR流体胶层填覆于所述第二四边形防溢栏与所述触控面板形成的空间中，所述第二OCR流体胶层将所述触控面板与所述OLED器件粘合在一起。
  3. 如权利要求2所述的柔性显示面板结构，其中所述第一OCR流体胶层的面积大于所述第二OCR流体胶层的面积，且所述第二OCR流体胶层的厚度大于所述第一OCR流体胶层的厚度。
  4. 如权利要求3所述的柔性显示面板结构，其中所述OLED器件与所述背板之间还包括光学透明粘结剂(Optically Clear Adhesive, OCA)将所述OLED器件与所述背板粘合在一起。
  5. 如权利要求4所述的柔性显示面板结构，其中所述第一四边形防溢栏、以及第二四边形防溢栏为OCR流体胶所组成。
  6. 如权利要求3所述的柔性显示面板结构，其中所述背板为金属薄片。
  7. 如权利要求4所述的柔性显示面板结构，其中所述OCA的厚度为10微米至20微米。
  8. 如权利要求4所述的柔性显示面板结构，其中所述第一OCR流体胶层的厚度为3微米至5微米。
  9. 一种柔性显示面板结构的制作方法，其中包括如下步骤：
    步骤S1、提供盖板；
    步骤S2、打印防溢栏，在所述盖板上通过喷墨打印方式进行所述打印防溢栏，所述防溢栏为OCR流体胶；
    步骤S3、预固化，通过紫外光线(Ultraviolet Rays，UV)光照射所述防溢栏，预固化所述OCR流体胶在所述盖板上；
    步骤S4、贴合触控面板，将所述触控面板贴合在具有预固化所述OCR流体胶的所述盖板的上方；
    步骤S5、打印防溢栏，在所述触控面板上通过喷墨打印方式进行所述打印防溢栏，所述防溢栏为OCR流体胶；
    步骤S6、预固化，通过UV光照射所述触控面板上的所述防溢栏，预固化所述OCR流体胶在所述触控面板上；以及
    步骤S7、贴合OLED器件，将所述OLED器件贴合在具有预固化所述OCR流体胶的所述触控面板的上方。
  10. 如权利要求9所述的制作方法，其中所述步骤S2的所述防溢栏与所述盖板间形成的围合空间中具有第一开口，所述步骤S5的所述防溢栏与所述触控面板间形成的围合空间中具有第二开口，在所述步骤S6预固化之后，还包括使用UV光对所述盖板上的所述OCR流体胶及所述触控面板上的所述OCR流体胶进行二次固化，之后，采用注入法经由所述第一开口形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中、及经由所述第二开口形成第二OCR流体胶层于所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中，接着，使用OCR作为框胶密封所述第一开口与所述第二开口、并使用UV固化所述框胶。
  11. 如权利要求9所述的制作方法，其中所述步骤S3预固化之后，还包括形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中，以及，所述步骤S6预固化之后，还包括形成第二OCR流体胶层于所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中。
  12. 如权利要求9所述的制作方法，其中在所述步骤S6预固化之后，还包括使用UV光对所述步骤S2形成的所述OCR流体胶及所述步骤S5形成的所述OCR流体胶进行二次固化，且所述步骤S2形成的所述OCR流体胶及所述步骤S5形成的所述OCR流体胶为四边形。
  13. 如权利要求9所述的制作方法，其中所述步骤S7的所述OLED器件还包括背板，所述背板通过OCA将所述背板与所述OLED器件粘合在一起。
  14. 如权利要求13所述的制作方法，其中所述背板为不锈钢金属薄片。
  15. 如权利要求9所述的制作方法，其中在所述步骤S6预固化之后，还包括使用UV光对所述盖板上的所述OCR流体胶及所述触控面板上的所述OCR流体胶进行二次固化，之后，采用滴加法形成第一OCR流体胶层于所述步骤S2形成的所述防溢栏与所述盖板间形成的围合空间中、及所述步骤S5形成的所述防溢栏与所述触控面板间形成的围合空间中。
  16. 一种柔性显示面板结构，包括依次设置的盖板、触控面板、有机发光二极管(Organic Light-Emitting Diode, OLED)器件、以及背板，其中所述盖板与所述触控面板之间具有第一四边形防溢栏、以及第一光学透明树酯(Optical Clear Resin, OCR)流体胶层填覆于所述第一四边形防溢栏与所述盖板形成的空间中，所述第一OCR流体胶层将所述盖板与所述触控面板粘合在一起，其中所述第一四边形防溢栏为一平形四边形防溢栏，所述触控面板与所述OLED器件之间还包括第二四边形防溢栏、以及第二OCR流体胶层填覆于所述第二四边形防溢栏与所述触控面板形成的空间中，所述第二OCR流体胶层将所述触控面板与所述OLED器件粘合在一起。
  17. 如权利要求16所述的柔性显示面板结构，其中所述第一OCR流体胶层的面积大于所述第二OCR流体胶层的面积，且所述第二OCR流体胶层的厚度大于所述第一OCR流体胶层的厚度。
  18. 如权利要求17所述的柔性显示面板结构，其中所述OLED器件与所述背板之间还包括光学透明粘结剂(Optically Clear Adhesive, OCA)将所述OLED器件与所述背板粘合在一起。
  19. 如权利要求18所述的柔性显示面板结构，其中所述第一四边形防溢栏、以及第二四边形防溢栏为OCR流体胶所组成，所述OCA的厚度为10微米至20微米。
  20. 如权利要求17所述的柔性显示面板结构，其中所述第一OCR流体胶层的厚度为3微米至5微米。
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