WO2021213048A1 - 柔性显示结构及其制造方法、显示装置 - Google Patents

柔性显示结构及其制造方法、显示装置 Download PDF

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Publication number
WO2021213048A1
WO2021213048A1 PCT/CN2021/079928 CN2021079928W WO2021213048A1 WO 2021213048 A1 WO2021213048 A1 WO 2021213048A1 CN 2021079928 W CN2021079928 W CN 2021079928W WO 2021213048 A1 WO2021213048 A1 WO 2021213048A1
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WO
WIPO (PCT)
Prior art keywords
flexible display
display panel
reinforcing
strip
adhesive
Prior art date
Application number
PCT/CN2021/079928
Other languages
English (en)
French (fr)
Inventor
刘少奎
青威
汤强
王志会
刘兴国
毕先磊
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
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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 US17/613,120 priority Critical patent/US20220206538A1/en
Priority to GB2208284.6A priority patent/GB2606874A/en
Publication of WO2021213048A1 publication Critical patent/WO2021213048A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1656—Details related to functional adaptations of the enclosure, e.g. to provide protection against EMI, shock, water, or to host detachable peripherals like a mouse or removable expansions units like PCMCIA cards, or to provide access to internal components for maintenance or to removable storage supports like CDs or DVDs, or to mechanically mount accessories
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/18—Telephone sets specially adapted for use in ships, mines, or other places exposed to adverse environment
    • H04M1/185—Improving the rigidity of the casing or resistance to shocks

Definitions

  • the present disclosure relates to the field of display devices, and in particular to a flexible display structure, a manufacturing method thereof, and a display device.
  • Flexible display screen refers to a display screen that can be bent and deformed. Compared with traditional display screens, flexible display screens can be bent or folded, and have many advantages such as impact resistance, strong shock resistance, light weight, and convenient portability. Therefore, flexible display screens are becoming more and more widely used.
  • the flexible display structure is an important part of the flexible display screen, and the flexible display structure usually includes a flexible display panel and a support layer.
  • the flexible display panel and the support layer are bonded as a whole.
  • the flexible display screen will experience multiple bends during use, and the related flexible display screen is prone to the problem of separation and delamination of the flexible display panel and the support layer after multiple bends, which affects the normal use of the flexible display screen.
  • the embodiments of the present disclosure provide a flexible display structure, a manufacturing method thereof, and a display device.
  • the technical solution is as follows:
  • the embodiments of the present disclosure provide a flexible display structure, including a reinforcing adhesive strip, a stacked flexible display panel and a supporting layer, the flexible display panel has a first surface and a second surface opposite to each other, and is connected to the On the first side surface of the first surface and the second surface, the reinforcing adhesive strip is located on the first side surface, and the reinforcing adhesive strip adheres the flexible display panel and the support layer.
  • the supporting layer has a third surface and a fourth surface opposite to each other, and a second side surface connecting the third surface and the fourth surface, and the third surface is attached to the second surface,
  • the orthographic projection of the flexible display panel on the third surface is located in the third surface, the reinforcing adhesive strip adheres the third surface and the first side surface, or the reinforcing adhesive strip is also Located on the second side surface, the reinforcing adhesive strip adheres to the third surface, the first side surface and the second side surface.
  • the supporting layer has a third surface and a fourth surface opposite to each other, and a second side surface connecting the third surface and the fourth surface, and the third surface is attached to the second surface,
  • the orthographic projection of the flexible display panel on the third surface coincides with the third surface, and the reinforcing adhesive strip adheres the first side surface and the second side surface.
  • the reinforcing adhesive strips are distributed between the plane where the first surface is located and the plane where the surface of the support layer is away from the flexible display panel.
  • the flexible display structure further includes a transparent cover plate, the transparent cover plate is stacked on the flexible display panel, and the flexible display panel is located between the transparent cover plate and the support layer,
  • the reinforcing adhesive strip adheres the transparent cover plate and the flexible display panel.
  • the transparent cover has a fifth surface and a sixth surface opposite to each other, and a third side surface connecting the fifth surface and the sixth surface, and the sixth surface is attached to the first surface ,
  • the orthographic projection of the flexible display panel on the sixth surface is located in the sixth surface; the reinforcing adhesive strip adheres the sixth surface and the first side surface, or the reinforcing adhesive strip It is also located on the third side surface, and the reinforcing adhesive strip adheres to the first side surface, the sixth surface and the third side surface.
  • the transparent cover has a fifth surface and a sixth surface opposite to each other, and a third side surface connecting the fifth surface and the sixth surface, and the sixth surface is attached to the first surface
  • the orthographic projection of the flexible display panel on the sixth surface coincides with the sixth surface, and the reinforcing adhesive strip adheres the first side surface and the third side surface.
  • the reinforcing rubber strips are distributed between the plane where the fifth surface is located and the plane where the fourth surface is located.
  • the surface of the reinforcing rubber strip away from the first side surface is a flat surface or a smooth curved surface.
  • the distance between the surface of the reinforcing strip away from the first side surface and the first side surface is 5 ⁇ m to 300 ⁇ m.
  • the reinforcing rubber strip is arranged around the first side surface.
  • the reinforcing rubber strip is formed by curing with an ultraviolet-moisture dual curing glue.
  • the storage modulus of the reinforcing rubber strip is 60 kpa to 150 kpa, and the shear strength is 3 kgf/cm 2 to 5 kgf/cm 2 .
  • an adhesive layer is provided between the flexible display panel and the supporting layer, and the orthographic projection of the adhesive layer on the supporting layer is located on the flexible display panel on the supporting layer. Within the orthographic projection.
  • the flexible display panel includes a panel body, a polarizer, and a polyethylene terephthalate film that are stacked, and the polarizer and the polyethylene terephthalate film are respectively located in the On both sides of the panel body, the polyethylene terephthalate film and the supporting layer are located on the same side of the panel body.
  • embodiments of the present disclosure also provide a method for manufacturing a flexible display structure, the method including:
  • the flexible display panel having a first surface and a second surface opposed to each other, and a first side surface connecting the first surface and the second surface;
  • a reinforcing adhesive strip is formed on the first side surface, and the reinforcing adhesive strip adheres the flexible display panel and the support layer.
  • the forming a reinforcing rubber strip on the first side surface includes:
  • the ultraviolet-moisture dual curing adhesive is cured to form the reinforcing adhesive strip.
  • the curing of the ultraviolet-moisture dual curing adhesive to form the reinforcing adhesive strip includes:
  • the ultraviolet-moisture dual-curing adhesive While spraying the ultraviolet-moisture dual-curing adhesive on the first side surface, the ultraviolet-moisture dual-curing adhesive sprayed on the first side by ultraviolet light irradiation until the ultraviolet-moisture dual-curing adhesive is cured Is the reinforcing strip.
  • the curing of the ultraviolet-moisture dual curing adhesive to form the reinforcing adhesive strip includes:
  • the ultraviolet-moisture dual-curing adhesive sprayed on the first side by ultraviolet light is applied to half of the ultraviolet-moisture dual-curing adhesive.
  • the flexible display panel is allowed to stand until the ultraviolet-moisture dual curing adhesive is completely cured.
  • embodiments of the present disclosure also provide a display device, including the flexible display structure as described above.
  • Figure 1 is a layered schematic diagram of a flexible display structure in the related art
  • FIG. 2 is a partial structural diagram of a flexible display structure provided by an embodiment of the present disclosure
  • Fig. 3 is a cross-sectional view of A-A in Fig. 2;
  • FIG. 4 is a partial structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 5 is a partial structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 10 is a manufacturing method of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 11 is a manufacturing method of a flexible display structure provided by an embodiment of the present disclosure.
  • FIG. 12 is a schematic diagram of the structure of a flexible display panel and a supporting layer provided by an embodiment of the present disclosure
  • FIG. 13 is a schematic structural diagram of a flexible display panel provided with a transparent cover provided by an embodiment of the present disclosure
  • FIG. 14 is a schematic diagram of the process of spraying UV-moisture dual curing adhesive provided by an embodiment of the present disclosure.
  • FIG. 1 is a layered schematic diagram of a flexible display structure in the related art.
  • the flexible display structure includes a flexible display panel 1 and a support layer 2, and the support layer 2 is usually made of stainless steel.
  • the flexible display panel 1 and the support layer 2 are adhered by an adhesive layer 3. Due to the large difference in modulus between the flexible display panel 1 and the support layer 2, when the flexible display structure is bent, the deformation between the flexible display panel 1 and the support layer 2 is not synchronized, so that the flexible display panel 1 and the support layer 2 are not synchronized. There is a large misalignment between the layers 2.
  • the stress generated by the misalignment has the component force F shown in Figure 1, and the cohesive force generated by the adhesive layer 3 is not enough to offset the generated misalignment, and finally in the component force F
  • the flexible display panel 1 and the support layer 2 are separated, and the flexible display structure is layered, which affects the normal use of the flexible display screen.
  • the flexible display structure is usually subjected to a bending test, and only products that pass the bending test can be sold.
  • the flexible display panel and the support layer will be separated and layered, and the product cannot pass the bending test. The yield is low.
  • FIG. 2 is a partial top view of a flexible display structure provided by an embodiment of the present disclosure.
  • Fig. 3 is a cross-sectional view taken along the line A-A in Fig. 2.
  • the display device includes a reinforcing rubber strip 10, a stacked flexible display panel 20 and a supporting layer 30.
  • the flexible display panel 20 has a first surface 21 and a second surface 22 opposite to each other, and a first side surface 23 connecting the first surface 21 and the second surface 22.
  • the reinforcing rubber strip 10 is located on the first side surface 23, and the reinforcing rubber strip 10 The flexible display panel 20 and the support layer 30 are bonded.
  • the flexible display panel has a first surface and a second surface opposite to each other, and a first side surface connecting the first surface and the second surface.
  • a reinforcing adhesive strip is arranged on the first side, and the reinforcing adhesive strip adheres the flexible display panel and the support.
  • the layer makes the flexible display panel and the support layer more tightly combined, and the reinforcing tape can improve the bending performance of the flexible display structure and reduce the possibility of the flexible display panel and the support layer being separated and stratified in normal use.
  • an adhesive layer 40 is provided between the flexible display panel 20 and the support layer 30.
  • the orthographic projection of the adhesive layer 40 on the support layer 30 is located on the orthographic projection of the flexible display panel 20 on the support layer 30. Inside.
  • the adhesive layer 40 is used to bond the flexible display panel 20 and the support layer 30. Since the adhesive layer 40 is squeezed and deformed during bonding, it may overflow between the flexible display panel 20 and the support layer 30. Therefore, by controlling the area of the adhesive layer 40, the adhesive layer The orthographic projection of 40 on the support layer 30 is within the orthographic projection of the flexible display panel 20 on the support layer 30, which can prevent the adhesive layer 40 from overflowing after being squeezed.
  • the adhesive layer 40 may be optical glue or foam.
  • FIG. 4 is a partial structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • the flexible display panel 20 may include a stacked panel body 201, a polarizer 202, and a PET (polyethylene terephthalate) film 203.
  • the polarizer 202 and the PET film 203 are located on the panel body 201, respectively.
  • the PET film 203 and the support layer 30 are located on the same side of the panel body 201, the PET film 203 can be bonded to the panel body 201 by pressure sensitive adhesive 204, and the PET film 203 and the support layer 30 are bonded by the adhesive layer 40 .
  • the panel body 201 may adopt an OLED (Organic Light-Emitting Diode, Organic Light-Emitting Diode) display panel.
  • OLED Organic Light-Emitting Diode, Organic Light-Emitting Diode
  • the reinforcing rubber strip 10 is formed by curing with an ultraviolet-moisture dual curing glue.
  • the reinforcing rubber strip 10 formed by curing by the UV-moisture dual curing adhesive is soft in texture.
  • the storage modulus of the reinforcing rubber strip 10 is 60kpa ⁇ 150kpa, and the shear strength is 3kgf/cm 2 ⁇ 5kgf/cm 2 , which is more
  • the high storage modulus enables the reinforcing rubber strip 10 to absorb most of the impact force, and the high shear strength can overcome the stress generated when the flexible display structure is bent, and reduce the risk of delamination of the flexible display structure.
  • the reinforcing rubber strip 10 can absorb more than 60% of the impact force.
  • the UV-moisture dual curing adhesive also has the characteristics of low glass transition temperature. The glass transition temperature reaches -35°C ⁇ -48°C, and it has good waterproof performance. It can prevent the flexible display panel 20 and the support layer 30 from delamination at the same time. The flexible display structure is well protected, and the flexible display structure is prevented from being damaged by bumps or being corroded by water vapor.
  • the surface 10a of the reinforcing rubber strip 10 away from the first side surface 23 may be a flat surface or a smooth curved surface, that is, the surface 10a of the reinforcing rubber strip 10 is smooth. If the surface 10a of the reinforcing rubber strip 10 is uneven, the reinforcing rubber strip 10 is likely to be damaged during the use of the flexible display structure. Making the surface 10a of the reinforcing rubber strip 10 a flat surface can help extend the life of the reinforcing rubber strip 10.
  • the distance between the surface 10a of the reinforcing strip 10 away from the first side surface 23 and the first side surface 23 may be 5 ⁇ m to 300 ⁇ m. That is, the thickness of the reinforcing rubber strip 10 may be 5 ⁇ m to 300 ⁇ m. Excessively thick reinforcing tape 10 is not conducive to the use of the flexible display structure. In the case of ensuring that the reinforcing tape 10 has sufficient strength to connect the flexible display panel 20 and the support layer 30, the reinforcing tape 10 can be set as much as possible Thin. Exemplarily, the thickness of the reinforcing rubber strip 10 may be 5 ⁇ m-50 ⁇ m.
  • the reinforcing rubber strip 10 is arranged around the first side surface 23 of the display panel 20.
  • the shape of the flexible display structure provided by the embodiments of the present disclosure may be a rectangle or an irregular shape, such as a circle or an ellipse.
  • the shape of the flexible display structure is an irregular shape, The bending of the flexible display structure is more prone to delamination.
  • the reinforcing rubber strips 10 are arranged around the flexible display panel 20, which can effectively avoid the delamination phenomenon of the flexible display structure.
  • the support layer 30 has a third surface 31 and a fourth surface 32 opposed to each other, and a second side surface 33 connecting the third surface 31 and the fourth surface 32, and the third surface 31 is attached to the second surface 22,
  • the orthographic projection of the flexible display panel 20 on the third surface 31 is located in the third surface 31.
  • the reinforcing rubber strip 10 may be located on the third surface 31. That is, the reinforcing adhesive strip 10 adheres the first side surface 23 of the flexible display panel 20 and the third surface 31 of the support layer 30, so as to prevent the flexible display panel 20 from detaching from the support layer 30 when the flexible display structure is bent, resulting in a flexible display Structure layering.
  • FIG. 5 is a partial structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • the difference between the flexible display structure shown in FIG. 5 and the flexible display structure shown in FIG. 4 is that the reinforcing rubber strip 10 is also located on the second side surface 33.
  • the reinforcing tape 10 adheres to the first side surface 23 of the flexible display panel 20, the third surface 31 and the second side surface 33 of the supporting layer 30, and a part of the reinforcing tape 10 covers the second side surface 33, which can increase
  • the large contact area between the reinforcing rubber strip 10 and the support layer 30 increases the bonding force between the reinforcing rubber strip 10 and the support layer 30, and further prevents the flexible display panel 20 from detaching from the support layer 30, resulting in delamination of the flexible display structure.
  • the reinforcing adhesive strip 10 may be distributed between the plane where the first surface 21 of the flexible display panel 20 is located and the plane where the fourth surface 32 of the support layer 30 is located. If the reinforcing adhesive strip 10 covers the first surface 21 of the flexible display panel 20 or the fourth surface 32 of the support layer 30, it will protrude from the first surface 21 and the fourth surface 32, which is not only unsightly, but also during use. The part of the middle reinforcing rubber strip 10 on the first surface 21 and the fourth surface 32 is easy to fall off, which may cause the reinforcing rubber strip 10 on the first side surface 23 to also fall off.
  • the reinforcing rubber strip 10 can be flush with the first surface 21 and the fourth surface 32, so that the contact area of the reinforcing rubber strip 10 with the flexible display panel 20 and the support layer 30 can be maximized.
  • the bonding force between the reinforcing rubber strip 10 and the support layer 30 is greater, and the flexible display panel 20 and the support layer 30 are further prevented from being separated, resulting in delamination of the flexible display structure.
  • FIG. 6 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure. The difference from the flexible display structure shown in FIG. 5 is that, in FIG. 6, the orthographic projection of the flexible display panel 20 on the third surface 31 coincides with the third surface 31.
  • the reinforcing adhesive strip 10 is also located on the second side 33, that is, the reinforcing adhesive strip 10 adheres to the first side 23 of the flexible display panel 20 and the second side 33 of the support layer 30, thereby avoiding flexible display.
  • the flexible display panel 20 separates from the support layer 30, resulting in delamination of the flexible display structure.
  • FIG. 7 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • the flexible display structure further includes a transparent cover 50.
  • the transparent cover 50 is stacked on the flexible display panel 20, and the flexible display panel 20 is located between the transparent cover 50 and the support layer 30.
  • the transparent cover 50 can provide protection for the flexible display panel 20 and prevent the flexible display panel 20 from being scratched.
  • the transparent cover 50 can be adhered to the flexible display panel 20 through the optical adhesive layer 60.
  • the transparent cover 50 may be polyimide (Colorless Polyimide; CPI) or ultra-thin glass (Ultra Thin Glass; UTG). Both CPI and UTG have good transparency and strength, and can protect the flexible display structure without affecting the brightness of the flexible display structure.
  • CPI Colorless Polyimide
  • UTG Ultra-thin glass
  • the transparent cover 50 has a fifth surface 51 and a sixth surface 52 opposite to each other, and a third side surface 53 connecting the fifth surface 51 and the sixth surface 52, and the sixth surface 52 is attached to the first surface 21.
  • the orthographic projection of the flexible display panel 20 on the sixth surface 52 is located in the sixth surface 52.
  • the reinforcing adhesive strip 10 can bond the transparent cover 50 and the flexible display panel 20. Therefore, the transparent cover 50 and the flexible display panel 20 are prevented from being separated.
  • the reinforcing rubber strip 10 may be located on the sixth surface 52. That is, the reinforcing adhesive strip 10 adheres the sixth surface 52 of the transparent cover 50 and the first side surface 23 of the flexible display panel 20, so as to prevent the flexible display panel 20 from separating from the transparent cover 50 when the flexible display structure is bent. Flexible display structure is layered.
  • FIG. 8 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure.
  • the difference between the flexible display structure and the flexible display structure shown in FIG. 7 is that in the flexible display structure shown in FIG. 8, the reinforcing rubber strip 10 is still located on the third side surface 53. That is, the reinforcing adhesive strip 10 adheres the first side surface 23 of the flexible display panel 20, the sixth surface 52 and the third side surface 53 of the transparent cover 50. A part of the reinforcing rubber strip 10 is covered on the third side surface 53, so that the contact area between the reinforcing rubber strip 10 and the transparent cover 50 can be increased, and the binding force of the reinforcing rubber strip 10 and the transparent cover 50 can be greater. It is further avoided that the flexible display panel 20 is separated from the transparent cover 50, resulting in delamination of the flexible display structure.
  • the reinforcing rubber strip 10 may be distributed between the plane where the fifth surface 51 of the transparent cover 50 is located and the plane where the fourth surface 32 of the support layer 30 is located. If the reinforcing rubber strip 10 covers the fifth surface 51 of the transparent cover 50 or the fourth surface 32 of the support layer 30, it will protrude from the fifth surface 51 and the fourth surface 32, which is not only unsightly, but also during use. The part of the middle reinforcing rubber strip 10 on the fifth surface 51 and the fourth surface 32 is easy to fall off, which may cause the reinforcing rubber strip 10 on the first side surface 23 to also fall off.
  • the reinforcing rubber strip 10 can be flush with the fifth surface 51 and the fourth surface 32, so that the contact between the reinforcing rubber strip 10 and the transparent cover 50, the flexible display panel 20, and the support layer 30 can be maximized. area.
  • the bonding force between the reinforcing rubber strip 10 and the transparent cover plate 50 is greater, and the flexible display panel 20 and the transparent cover plate 50 are further prevented from being separated, resulting in delamination of the flexible display structure.
  • FIG. 9 is a schematic structural diagram of a flexible display structure provided by an embodiment of the present disclosure. The difference from the flexible display structure shown in FIG. 8 is that in the flexible display structure shown in FIG. 9, the orthographic projection of the flexible display panel 20 on the sixth surface 52 coincides with the sixth surface 52.
  • the reinforcing adhesive strip 10 is also located on the third side surface 53, that is, the reinforcing adhesive strip 10 adheres to the first side surface 23 of the flexible display panel 20 and the third side surface 53 of the transparent cover 50 to avoid bending
  • the flexible display panel 20 is separated from the transparent cover 50, causing the flexible display structure to be layered.
  • the supporting layer 30 may also adopt the arrangement in FIG. 6.
  • the embodiment of the present disclosure also provides a display device, which includes any of the display structures shown in FIGS. 3 to 9.
  • the display device may be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or a navigator.
  • FIG. 10 is a manufacturing method of a flexible display structure provided by an embodiment of the present disclosure. This method is used to manufacture flexible display structures as shown in FIGS. 3-9. As shown in Figure 10, the method includes:
  • step S11 a stacked flexible display panel and a supporting layer are provided.
  • the flexible display panel has a first surface and a second surface opposite to each other, and a first side surface connecting the first surface and the second surface.
  • step S12 a reinforcing rubber strip is formed on the first side surface.
  • Reinforcing adhesive strips bond the flexible display panel and the support layer.
  • the flexible display panel has a first surface and a second surface opposite to each other, and a first side surface connecting the first surface and the second surface.
  • a reinforcing adhesive strip is arranged on the first side, and the reinforcing adhesive strip adheres the flexible display panel and the support.
  • the layer makes the flexible display panel and the support layer more tightly combined, and the reinforcing tape can improve the bending performance of the flexible display structure and reduce the possibility of the flexible display panel and the support layer being separated and stratified in normal use.
  • FIG. 11 is a manufacturing method of a flexible display structure provided by an embodiment of the present disclosure. This method can be used to manufacture the flexible display structure shown in FIGS. 3-9. Hereinafter, taking the flexible display structure shown in FIG. 7 as an example, the method will be described in detail with reference to FIGS. 12 to 14. As shown in Figure 11, the method includes:
  • step S21 a stacked flexible display panel and a supporting layer are provided.
  • FIG. 12 is a schematic structural diagram of a flexible display panel and a supporting layer provided by an embodiment of the present disclosure.
  • the flexible display panel 20 has a first surface 21 and a second surface 22 opposite to each other, a first side surface 23 connecting the first surface 21 and the second surface 22, and the support layer 30 has a third surface 31 opposite to each other.
  • the fourth surface 32, the second side surface 33 connecting the third surface 31 and the fourth surface 32, and the third surface 31 is attached to the second surface 22.
  • the flexible display panel 20 may include a panel body 201, a polarizer 202, and a PET film 203 that are stacked.
  • the polarizer 202 and the PET film 203 are respectively located on both sides of the panel body 201, and the PET film 203 and the support layer 30 are located on the same side of the panel body 201.
  • the PET film 203 can be bonded to the panel body 201 by pressure-sensitive adhesive, and the PET film 203 and the support layer 30 are bonded by the adhesive layer 40.
  • the flexible display panel 20 After the flexible display panel 20 is bonded to the support layer 30, the flexible display panel 20 can be laser cut to ensure that the tolerance of the outer contour of the flexible display panel 20 meets the design requirements.
  • step S22 a transparent cover is provided on the flexible display panel.
  • FIG. 13 is a schematic structural diagram of a flexible display panel provided with a transparent cover provided by an embodiment of the present disclosure. As shown in FIG. 13, the transparent cover 50 is stacked on the flexible display panel 20, and the flexible display panel 20 is located between the transparent cover 50 and the support layer 30. The transparent cover 50 can provide protection for the flexible display panel 20 and prevent the flexible display panel 20 from being scratched.
  • the transparent cover 50 can be adhered to the flexible display panel 20 through the optical adhesive layer 60.
  • the transparent cover 50 may be CPI or UTG. Both CPI and UTG have good transparency and strength, and can protect the flexible display structure without affecting the brightness of the flexible display structure.
  • the transparent cover 50 has a fifth surface 51 and a sixth surface 52 opposite to each other, a third side surface 53 connecting the fifth surface 51 and the sixth surface 52, and the sixth surface 52 is attached to the first surface 21. .
  • step S23 an ultraviolet-moisture dual curing glue is sprayed on the first side through a nozzle.
  • FIG. 14 is a schematic diagram of the process of spraying UV-moisture dual curing adhesive provided by an embodiment of the present disclosure.
  • the UV-moisture dual curing adhesive 70 is sprayed through the nozzle 80.
  • the pressure generated by the nozzle 80 is conducive to the UV-moisture dual curing adhesive 70 filling the tiny gaps on the first surface 23.
  • the bonding force between the reinforcing rubber strip 10 and the first surface 23 is greater.
  • step S24 the ultraviolet-moisture dual curing adhesive is cured to form a reinforcing adhesive strip.
  • the curing of the UV-moisture dual curing adhesive 70 can be performed in the following manner:
  • the ultraviolet-moisture dual-curing adhesive 70 sprayed on the first side 23 is irradiated by ultraviolet light to reach the UV-humidity.
  • the air dual curing adhesive 70 is cured into a reinforcing adhesive strip 10.
  • the ultraviolet-moisture dual curing adhesive 70 can be cured under the irradiation of ultraviolet light.
  • the ultraviolet-moisture dual-curing adhesive 70 has good fluidity before curing. By spraying the ultraviolet-moisture dual-curing adhesive 70 while irradiating with ultraviolet light, the ultraviolet-moisture dual-curing adhesive 70 can be rapidly solidified and formed. Avoid the UV-moisture dual curing glue 70 from flowing.
  • the ultraviolet-moisture dual curing adhesive 70 can be completely cured by controlling the intensity and irradiation time of the ultraviolet light, and the reinforcing adhesive strip 10 can be obtained. In the process of performing ultraviolet light, the ultraviolet light device 90 can move together with the nozzle 80.
  • the UV-moisture dual curing adhesive 70 can be sprayed on the first side 23 while using ultraviolet light to spray the UV-moisture dual curing adhesive 70 on the first side 23 to the ultraviolet -The moisture dual curing adhesive 70 is semi-cured, and the flexible display panel 20 is left to stand until the UV-moisture dual curing adhesive 70 is completely cured.
  • the ultraviolet-moisture dual curing adhesive 70 can not only be cured under ultraviolet light, but can also be cured spontaneously by absorbing moisture in the air. By controlling the intensity and irradiation time of ultraviolet light, the UV-moisture dual curing adhesive 70 can be semi-cured. For example, the UV-moisture dual curing adhesive 70 can be cured by 60% to 70%. The fluidity of 70 is judged, and the UV-moisture dual curing adhesive 70 does not flow when irradiated. Then, by standing still, the UV-moisture dual curing adhesive 70 is completely cured. In the process of performing ultraviolet light, the ultraviolet light device 90 can move together with the nozzle 80.
  • the occupation time of the UV illumination device 90 by a single flexible display structure can be reduced, which is beneficial to improve production efficiency and reduce production costs.

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Abstract

一种柔性显示结构及其制造方法、显示装置，属于显示设备领域。该柔性显示结构包括补强胶条（10）、叠置的柔性显示面板（20）和支撑层（30），柔性显示面板（20）具有相对的第一表面（21）和第二表面（22）、连接第一表面（21）和第二表面（22）的第一侧面（23），补强胶条（10）位于第一侧面上（23），补强胶条（10）粘接柔性显示面板（20）和支撑层（30）。通过在第一侧面设置补强胶条（10），并且补强胶条（10）粘接柔性显示面板（20）和支撑层（30），使柔性显示面板（20）和支撑层（30）结合的更紧密，补强胶条（10）能够改善柔性显示结构的折弯性能，降低在正常使用中，柔性显示面板（20）与支撑层（30）脱开分层的可能性。

Description

柔性显示结构及其制造方法、显示装置
本公开要求于2020年4月20日提交的申请号为202010312890.5、发明名称为“柔性显示结构及其制造方法、显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示设备领域，特别涉及一种柔性显示结构及其制造方法、显示装置。
背景技术
柔性显示屏是指可弯曲变形的显示屏。与传统的显示屏相比，柔性显示屏可弯曲或者折叠，具有耐冲击、抗震能力强、重量轻、携带方便等诸多优点，因此柔性显示屏获得越来越广泛的应用。
柔性显示结构是柔性显示屏重要组成部分，柔性显示结构通常包括柔性显示面板和支撑层。柔性显示面板和支撑层粘接为一个整体。柔性显示屏在使用中会经历多次的弯折，相关的柔性显示屏在经历多次弯折后容易出现柔性显示面板与支撑层脱开分层的问题，影响柔性显示屏的正常使用。
发明内容
本公开实施例提供了一种柔性显示结构及其制造方法、显示装置。所述技术方案如下：
一方面，本公开实施例提供了一种柔性显示结构，包括补强胶条、叠置的柔性显示面板和支撑层，所述柔性显示面板具有相对的第一表面和第二表面、连接所述第一表面和所述第二表面的第一侧面，所述补强胶条位于所述第一侧面上，所述补强胶条粘接所述柔性显示面板和所述支撑层。
可选地，所述支撑层具有相对的第三表面和第四表面、连接所述第三表面和所述第四表面的第二侧面，所述第三表面与所述第二表面相贴，所述柔性显 示面板在所述第三表面的正投影位于所述第三表面内，所述补强胶条粘接所述第三表面和所述第一侧面，或者所述补强胶条还位于所述第二侧面上，所述补强胶条粘接所述第三表面、所述第一侧面和所述第二侧面。
可选地，所述支撑层具有相对的第三表面和第四表面、连接所述第三表面和所述第四表面的第二侧面，所述第三表面与所述第二表面相贴，所述柔性显示面板在所述第三表面的正投影与所述第三表面重合，所述补强胶条粘接所述第一侧面和所述第二侧面。
可选地，所述补强胶条分布于所述第一表面所在平面和所述支撑层远离所述柔性显示面板的表面所在平面之间。
可选地，所述柔性显示结构还包括透明盖板，所述透明盖板叠置在所述柔性显示面板上，且所述柔性显示面板位于所述透明盖板和所述支撑层之间，所述补强胶条粘接所述透明盖板和所述柔性显示面板。
可选地，所述透明盖板具有相对的第五表面和第六表面、连接所述第五表面和所述第六表面的第三侧面，所述第六表面与所述第一表面相贴，所述柔性显示面板在所述第六表面的正投影位于所述第六表面内；所述补强胶条粘接所述第六表面和所述第一侧面，或者所述补强胶条还位于所述第三侧面上，所述补强胶条粘接所述第一侧面、所述第六表面和所述第三侧面。
可选地，所述透明盖板具有相对的第五表面和第六表面、连接所述第五表面和所述第六表面的第三侧面，所述第六表面与所述第一表面相贴，所述柔性显示面板在所述第六表面的正投影与所述第六表面重合，所述补强胶条粘接所述第一侧面和所述第三侧面。
可选地，所述补强胶条分布于所述第五表面所在平面和所述第四表面所在平面之间。
可选地，所述补强胶条远离所述第一侧面的表面为平面或平滑曲面。
可选地，所述补强胶条远离所述第一侧面的表面与所述第一侧面的间距为5μm～300μm。
可选地，所述补强胶条围绕所述第一侧面布置。
可选地，所述补强胶条采用紫外-湿气双重固化胶固化形成。
可选地，所述补强胶条的储能模量为60kpa～150kpa，抗剪强度为3kgf/cm 2～5kgf/cm 2。
可选地，所述柔性显示面板和所述支撑层之间设置有粘合剂层，所述粘合剂层在所述支撑层上的正投影位于所述柔性显示面板在所述支撑层上的正投影内。
可选地，所述柔性显示面板包括叠置的面板本体、偏光片和聚对苯二甲酸乙二醇酯薄膜，所述偏光片和所述聚对苯二甲酸乙二醇酯薄膜分别位于所述面板本体的两侧，所述聚对苯二甲酸乙二醇酯薄膜和所述支撑层位于所述面板本体的同侧。
另一方面，本公开实施例还提供了一种柔性显示结构的制造方法，所述方法包括：
提供叠置的柔性显示面板和支撑层，所述柔性显示面板具有相对的第一表面和第二表面、连接所述第一表面和所述第二表面的第一侧面；
在所述第一侧面上形成补强胶条，所述补强胶条粘接所述柔性显示面板和所述支撑层。
可选地，所述在所述第一侧面上形成补强胶条，包括：
通过喷嘴在所述第一侧面喷涂紫外-湿气双重固化胶；
使所述紫外-湿气双重固化胶固化形成所述补强胶条。
可选地，所述使所述紫外-湿气双重固化胶固化形成所述补强胶条，包括：
在所述第一侧面喷涂紫外-湿气双重固化胶的同时，利用紫外光照射喷涂至所述第一侧面的所述紫外-湿气双重固化胶，至所述紫外-湿气双重固化胶固化为所述补强胶条。
可选地，所述使所述紫外-湿气双重固化胶固化形成所述补强胶条，包括：
在所述第一侧面喷涂紫外-湿气双重固化胶的同时，利用紫外光照射喷涂至所述第一侧面的所述紫外-湿气双重固化胶，至所述紫外-湿气双重固化胶半固化；
静置所述柔性显示面板至所述紫外-湿气双重固化胶完全固化。
又一方面，本公开实施例还提供了一种显示装置，包括如前所述的柔性显示结构。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，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是相关技术中的一种柔性显示结构的分层示意图；
图2是本公开实施例提供的一种柔性显示结构的局部结构示意图；
图3是图2的A-A截面图；
图4是本公开实施例提供的一种柔性显示结构的局部结构示意图；
图5是本公开实施例提供的一种柔性显示结构的局部结构示意图；
图6是本公开实施例提供的一种柔性显示结构的结构示意图；
图7是本公开实施例提供的一种柔性显示结构的结构示意图；
图8是本公开实施例提供的一种柔性显示结构的结构示意图；
图9是本公开实施例提供的一种柔性显示结构的结构示意图；
图10是本公开实施例提供的一种柔性显示结构的制造方法；
图11是本公开实施例提供的一种柔性显示结构的制造方法；
图12是本公开实施例提供的柔性显示面板和支撑层的结构示意图；
图13是本公开实施例提供的设置有透明盖板的柔性显示面板的结构示意图；
图14是本公开实施例提供的喷涂紫外-湿气双重固化胶的过程示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
图1是相关技术中的一种柔性显示结构的分层示意图。如图1所示，柔性显示结构包括柔性显示面板1和支撑层2，支撑层2通常是不锈钢材质。柔性显示面板1和支撑层2之间通过粘合剂层3粘接。由于柔性显示面板1和支撑层2之间的模量相差较大，因此柔性显示结构在进行弯折时，柔性显示面板1和支撑层2之间的形变不同步，使得柔性显示面板1和支撑层2之间产生较大的错动，错动产生的应力具有图1中所示的分力F，并且粘合剂层3产生的内聚力不足以抵消产生的错动，最终在分力F的作用下，柔性显示面板1和支撑层2脱 开，柔性显示结构出现分层，影响柔性显示屏的正常使用。目前为了降低柔性显示屏在使用中出现分层的可能性，通常会对柔性显示结构进行弯折测试，只有通过弯折测试的产品才能出售。但是相关的柔性显示屏在弯折测试过程中，例如弯折半径为2.5mm的弯折测试中，就会出现柔性显示面板与支撑层脱开分层的情况，无法通过弯折测试，导致产品良率低。
图2是本公开实施例提供的一种柔性显示结构的局部俯视图。图3是图2的A-A截面图。如图3所示，该显示装置包括补强胶条10、叠置的柔性显示面板20和支撑层30。
柔性显示面板20具有相对的第一表面21和第二表面22、连接第一表面21和第二表面22的第一侧面23，补强胶条10位于第一侧面23上，补强胶条10粘接柔性显示面板20和支撑层30。
柔性显示面板具有相对的第一表面和第二表面、连接第一表面和第二表面的第一侧面，通过在第一侧面设置补强胶条，并且补强胶条粘接柔性显示面板和支撑层，使柔性显示面板和支撑层结合的更紧密，补强胶条能够改善柔性显示结构的折弯性能，降低在正常使用中，柔性显示面板与支撑层脱开分层的可能性。
如图3所示，柔性显示面板20和支撑层30之间设置有粘合剂层40，粘合剂层40在支撑层30上的正投影位于柔性显示面板20在支撑层30上的正投影内。粘合剂层40用于粘接柔性显示面板20和支撑层30。由于在粘接时粘合剂层40会受到一定的挤压而变形，可能会从柔性显示面板20和支撑层30之间溢出，因此通过控制粘合剂层40的面积，使粘合剂层40在支撑层30上的正投影位于柔性显示面板20在支撑层30上的正投影内，可以避免粘合剂层40受到挤压后溢出。
示例性地，粘合剂层40可以是光学胶或者泡棉。
图4是本公开实施例提供的一种柔性显示结构的局部结构示意图。如图4所示，柔性显示面板20可以包括叠置的面板本体201、偏光片202、PET(聚对苯二甲酸乙二醇酯)薄膜203，偏光片202和PET薄膜203分别位于面板本体201的两侧，PET薄膜203和支撑层30位于面板本体201的同侧，PET薄膜203可以通过压敏胶204与面板本体201粘接，PET薄膜203与支撑层30通过粘合 剂层40粘接。
其中，面板本体201可以采用OLED(Organic Light-Emitting Diode，有机发光二极管)显示面板。
可选地，补强胶条10采用紫外-湿气双重固化胶固化形成。由紫外-湿气双重固化胶固化后形成的补强胶条10质地柔软，补强胶条10的储能模量为60kpa～150kpa，抗剪强度为3kgf/cm 2～5kgf/cm 2，较高的储能模量，使得补强胶条10可以吸收大部分的冲击力，较高的抗剪强度可以克服柔性显示结构弯折时产生的应力，降低柔性显示结构分层的风险。在储能模量为60kpa～150kpa的情况下，补强胶条10能吸收超过60％的冲击力。紫外-湿气双重固化胶还具有玻璃化转变温度低的特点，玻璃化转变温度达到-35℃～-48℃，并且防水性能好，在防止柔性显示面板20与支撑层30分层的同时可以很好地保护柔性显示结构，避免柔性显示结构在磕碰中受损或是受到水汽的侵蚀。
补强胶条10远离第一侧面23的表面10a可以为平面或平滑曲面，即补强胶条10的表面10a光滑。如果补强胶条10的该表面10a凹凸不平，在柔性显示结构的使用过程中，补强胶条10容易出现破损。使补强胶条10的该表面10a为平面，可以有利于延长补强胶条10的寿命。
可选地，补强胶条10远离第一侧面23的表面10a与第一侧面23的间距可以为5μm～300μm。即补强胶条10的厚度可以为5μm～300μm。过厚的补强胶条10不利于柔性显示结构的使用，在保证补强胶条10有足够的强度连接柔性显示面板20和支撑层30的情况下，可以将补强胶条10设置的尽量薄。示例性地，补强胶条10的厚度可以为5μm～50μm。
补强胶条10围绕显示面板20的第一侧面23布置。柔性显示结构在弯折时，四周均可能出现分层，通过在柔性显示面板20的四周都布置补强胶条10，可以进一步避免柔性显示结构出现分层现象。值得说明的是，本公开实施例提供的柔性显示结构的形状可以为矩形，也可以为不规则形状，例如圆形或椭圆形，相关技术中，若柔性显示结构的形状为不规则形状，对柔性显示结构进行弯折更容易出现分层现象。而本公开实施例中，在柔性显示面板20的四周都布置补强胶条10，可以有效避免柔性显示结构出现分层现象。
如图4所示，支撑层30具有相对的第三表面31和第四表面32、连接第三表面31和第四表面32的第二侧面33，第三表面31与第二表面22相贴，柔性 显示面板20在第三表面31的正投影位于第三表面31内。
补强胶条10可以位于第三表面31。即补强胶条10粘接柔性显示面板20的第一侧面23与支撑层30的第三表面31，从而避免柔性显示结构在弯折时柔性显示面板20与支撑层30脱开，造成柔性显示结构分层。
图5是本公开实施例提供的一种柔性显示结构的局部结构示意图。图5所示的柔性显示结构与图4所示的柔性显示结构的区别在于，补强胶条10还位于第二侧面33。即补强胶条10粘接柔性显示面板20的第一侧面23、支撑层30的第三表面31和第二侧面33，补强胶条10的一部分覆盖在第二侧面33上，这样能够增大补强胶条10与支撑层30的接触面积，使补强胶条10与支撑层30的结合力更大，进一步避免柔性显示面板20与支撑层30脱开，造成柔性显示结构分层。
补强胶条10可以分布于柔性显示面板20的第一表面21所在平面和支撑层30的第四表面32所在平面之间。补强胶条10如果覆盖到柔性显示面板20的第一表面21或支撑层30的第四表面32上，则会突出于第一表面21和第四表面32，不仅不美观，而且在使用过程中补强胶条10位于第一表面21和第四表面32上的部分容易脱落，可能导致位于第一侧面23的补强胶条10也一同脱落。
如图5所示，补强胶条10可以与第一表面21和第四表面32平齐，这样可以最大化补强胶条10与柔性显示面板20、支撑层30的接触面积。使补强胶条10与支撑层30的结合力更大，进一步避免柔性显示面板20与支撑层30脱开，造成柔性显示结构分层。
图6是本公开实施例提供的一种柔性显示结构的结构示意图。与图5所示的柔性显示结构的区别在于，图6中，柔性显示面板20在第三表面31的正投影与第三表面31重合。
在该柔性显示结构中，补强胶条10还位于第二侧面33，即补强胶条10粘接柔性显示面板20的第一侧面23和支撑层30的第二侧面33，从而避免柔性显示结构在弯折时柔性显示面板20与支撑层30脱开，造成柔性显示结构分层。
图7是本公开实施例提供的一种柔性显示结构的结构示意图。如图7所示，该柔性显示结构还包括透明盖板50。透明盖板50叠置在柔性显示面板20上， 且柔性显示面板20位于透明盖板50和支撑层30之间。透明盖板50可以为柔性显示面板20提供保护，避免柔性显示面板20被划伤。
透明盖板50可以通过光学胶层60与柔性显示面板20粘接。
可选地，透明盖板50可以是聚酰亚胺(Colorless Polyimide；CPI)或超薄玻璃(Ultra Thin Glass；UTG)。CPI和UTG均具有较好的透明度和强度，可以在不影响柔性显示结构亮度的情况下对柔性显示结构提供保护。
如图7所示，透明盖板50具有相对的第五表面51和第六表面52、连接第五表面51和第六表面52的第三侧面53，第六表面52与第一表面21相贴，柔性显示面板20在第六表面52的正投影位于第六表面52内。
补强胶条10可以粘接透明盖板50和柔性显示面板20。从而避免透明盖板50和柔性显示面板20脱开。
补强胶条10可以位于第六表面52。即补强胶条10粘接透明盖板50的第六表面52和柔性显示面板20的第一侧面23，从而避免柔性显示结构在弯折时柔性显示面板20与透明盖板50脱开，造成柔性显示结构分层。
图8是本公开实施例提供的一种柔性显示结构的结构示意图。如图8所示，该柔性显示结构与图7中所示的柔性显示结构的区别在于，图8所示的柔性显示结构中，补强胶条10还位于第三侧面53。即补强胶条10粘接柔性显示面板20的第一侧面23、透明盖板50的第六表面52和第三侧面53。补强胶条10的一部分覆盖在第三侧面53上，这样能够增大补强胶条10与透明盖板50的接触面积，使补强胶条10与透明盖板50的结合力更大，进一步避免柔性显示面板20与透明盖板50脱开，造成柔性显示结构分层。
补强胶条10可以分布于透明盖板50的第五表面51所在平面和支撑层30的第四表面32所在平面之间。补强胶条10如果覆盖到透明盖板50的第五表面51或支撑层30的第四表面32上，则会突出于第五表面51和第四表面32，不仅不美观，而且在使用过程中补强胶条10位于第五表面51和第四表面32上的部分容易脱落，可能导致位于第一侧面23的补强胶条10也一同脱落。
如图8所示，补强胶条10可以与第五表面51和第四表面32平齐，这样可以最大化补强胶条10与透明盖板50、柔性显示面板20、支撑层30的接触面积。使补强胶条10与透明盖板50的结合力更大，进一步避免柔性显示面板20与透 明盖板50脱开，造成柔性显示结构分层。
图9是本公开实施例提供的一种柔性显示结构的结构示意图。与图8所示的柔性显示结构的区别在于，图9所示的柔性显示结构中，柔性显示面板20在第六表面52的正投影与第六表面52重合。
在该柔性显示结构中，补强胶条10还位于第三侧面53，即补强胶条10粘接柔性显示面板20的第一侧面23和透明盖板50的第三侧面53，避免在弯折柔性显示结构时，柔性显示面板20与透明盖板50脱开，造成柔性显示结构分层。
对于图7～图9所示的柔性显示结构，支撑层30也可以采用图6中的设置方式。
本公开实施例还提供了一种显示装置，该显示装置包括如图3～图9所示的任一种显示结构。示例性地，该显示装置可以是手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
图10是本公开实施例提供的一种柔性显示结构的制造方法。该方法用于制造如图3～图9所示的柔性显示结构。如图10所示，该方法包括：
在步骤S11中，提供叠置的柔性显示面板和支撑层。
其中，柔性显示面板具有相对的第一表面和第二表面、连接第一表面和第二表面的第一侧面。
在步骤S12中，在第一侧面上形成补强胶条。
补强胶条粘接柔性显示面板和支撑层。
柔性显示面板具有相对的第一表面和第二表面、连接第一表面和第二表面的第一侧面，通过在第一侧面设置补强胶条，并且补强胶条粘接柔性显示面板和支撑层，使柔性显示面板和支撑层结合的更紧密，补强胶条能够改善柔性显示结构的折弯性能，降低在正常使用中，柔性显示面板与支撑层脱开分层的可能性。
图11是本公开实施例提供的一种柔性显示结构的制造方法。该方法可以用于制造图3～图9所示的柔性显示结构。以下以图7所示的柔性显示结构为例， 结合图12～图14对该方法进行具体说明。如图11所示，该方法包括：
在步骤S21中，提供叠置的柔性显示面板和支撑层。
图12是本公开实施例提供的柔性显示面板和支撑层的结构示意图。如图12所示，柔性显示面板20具有相对的第一表面21和第二表面22、连接第一表面21和第二表面22的第一侧面23，支撑层30具有相对的第三表面31和第四表面32、连接第三表面31和第四表面32的第二侧面33，第三表面31与第二表面22相贴。
柔性显示面板20可以包括叠置的面板本体201、偏光片202、PET薄膜203，偏光片202和PET薄膜203分别位于面板本体201的两侧，PET薄膜203和支撑层30位于面板本体201的同侧，PET薄膜203可以通过压敏胶与面板本体201粘接，PET薄膜203与支撑层30通过粘合剂层40粘接。
柔性显示面板20与支撑层30粘接后可以对柔性显示面板20进行激光切割，以保证柔性显示面板20外轮廓的公差满足设计要求。
在步骤S22中，在柔性显示面板上设置透明盖板。
图13是本公开实施例提供的设置有透明盖板的柔性显示面板的结构示意图。如图13所示，透明盖板50叠置在柔性显示面板20上，且柔性显示面板20位于透明盖板50和支撑层30之间。透明盖板50可以为柔性显示面板20提供保护，避免柔性显示面板20被划伤。
透明盖板50可以通过光学胶层60与柔性显示面板20粘接。
可选地，透明盖板50可以是CPI或UTG。CPI和UTG均具有较好的透明度和强度，可以在不影响柔性显示结构亮度的情况下对柔性显示结构提供保护。
如图13所示，透明盖板50具有相对的第五表面51和第六表面52、连接第五表面51和第六表面52的第三侧面53，第六表面52与第一表面21相贴。
在步骤S23中，通过喷嘴在第一侧面喷涂紫外-湿气双重固化胶。
图14是本公开实施例提供的喷涂紫外-湿气双重固化胶的过程示意图。如图14所示，通过喷嘴80喷涂紫外-湿气双重固化胶70，喷嘴80产生的压力有利于使紫外-湿气双重固化胶70填充第一表面23上微小的缝隙，这样在紫外-湿气双重固化胶70凝固后，补强胶条10与第一表面23的结合力更大。
在步骤S24中，使紫外-湿气双重固化胶固化形成补强胶条。
参照图14，紫外-湿气双重固化胶70的固化可以采用如下方式进行：
在一种可能的实现方式中，在第一侧面23喷涂紫外-湿气双重固化胶70的同时，利用紫外光照射喷涂至第一侧面23的紫外-湿气双重固化胶70，至紫外-湿气双重固化胶70固化为补强胶条10。
紫外-湿气双重固化胶70可以在紫外光的照射下发生固化。紫外-湿气双重固化胶70在固化前具有较好的流动性，通过在喷涂紫外-湿气双重固化胶70的同时进行紫外光照射，可以使紫外-湿气双重固化胶70快速凝固成型，避免紫外-湿气双重固化胶70流动。可以通过控制紫外光的强度和照射时间，使紫外-湿气双重固化胶70完全固化，得到补强胶条10。在进行紫外光照的过程中，紫外光照设备90可以与喷嘴80一起运动。
在另一种可能的实现方式中，可以在第一侧面23喷涂紫外-湿气双重固化胶70的同时，利用紫外光照射喷涂至第一侧面23的紫外-湿气双重固化胶70，至紫外-湿气双重固化胶70半固化，静置柔性显示面板20至紫外-湿气双重固化胶70完全固化。
紫外-湿气双重固化胶70不仅可以在紫外光的照射下固化，也可以吸收空气中的水分而自发的固化。通过控制紫外光的强度和照射时间，使紫外-湿气双重固化胶70半固化，例如照射至紫外-湿气双重固化胶70固化60％～70％，具体可以根据紫外-湿气双重固化胶70的流动性进行判断，照射至紫外-湿气双重固化胶70不发生流动即可。再通过静置，使紫外-湿气双重固化胶70完全固化。在进行紫外光照的过程中，紫外光照设备90可以与喷嘴80一起运动。由于只需要通过紫外光照设备90将紫外-湿气双重固化胶70照射至半固化，因此可以减少单个柔性显示结构对紫外光照设备90的占用时间，有利于提高生产效率，降低生产成本。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (20)

  1. 一种柔性显示结构，包括补强胶条(10)、叠置的柔性显示面板(20)和支撑层(30)，所述柔性显示面板(20)具有相对的第一表面(21)和第二表面(22)、连接所述第一表面(21)和所述第二表面(22)的第一侧面(23)，所述补强胶条(10)位于所述第一侧面(23)上，所述补强胶条(10)粘接所述柔性显示面板(20)和所述支撑层(30)。
  2. 根据权利要求1所述的柔性显示结构，其中，所述支撑层(30)具有相对的第三表面(31)和第四表面(32)、连接所述第三表面(31)和所述第四表面(32)的第二侧面(33)，所述第三表面(31)与所述第二表面(22)相贴，所述柔性显示面板(20)在所述第三表面(31)的正投影位于所述第三表面(31)内；所述补强胶条(10)粘接所述第三表面(31)和所述第一侧面(23)，或者所述补强胶条(10)还位于所述第二侧面(33)上，所述补强胶条(10)粘接所述第三表面(31)、所述第一侧面(23)和所述第二侧面(33)。
  3. 根据权利要求1所述的柔性显示结构，其中，所述支撑层(30)具有相对的第三表面(31)和第四表面(32)、连接所述第三表面(31)和所述第四表面(32)的第二侧面(33)，所述第三表面(31)与所述第二表面(22)相贴，所述柔性显示面板(20)在所述第三表面(31)的正投影与所述第三表面(31)重合，所述补强胶条(10)粘接所述第一侧面(23)和所述第二侧面(33)。
  4. 根据权利要求2或3所述的柔性显示结构，其中，所述补强胶条(10)分布于所述第一表面(21)所在平面和所述第四表面(32)所在平面之间。
  5. 根据权利要求1所述的柔性显示结构，其中，所述柔性显示结构还包括透明盖板(50)，所述透明盖板(50)叠置在所述柔性显示面板(20)上，且所述柔性显示面板(20)位于所述透明盖板(50)和所述支撑层(30)之间，所述补强胶条(10)粘接所述透明盖板(50)和所述柔性显示面板(20)。
  6. 根据权利要求5所述的柔性显示结构，其中，所述透明盖板(50)具有相对的第五表面(51)和第六表面(52)、连接所述第五表面(51)和所述第六表面(52)的第三侧面(53)，所述第六表面(52)与所述第一表面(21)相贴，所述柔性显示面板(20)在所述第六表面(52)的正投影位于所述第六表面(52)内；所述补强胶条(10)粘接所述第六表面(52)和所述第一侧面(23)，或者所述补强胶条(10)还位于所述第三侧面(53)上，所述补强胶条(10)粘接所述第一侧面(23)、所述第六表面(52)和所述第三侧面(53)。
  7. 根据权利要求5所述的柔性显示结构，其中，所述透明盖板(50)具有相对的第五表面(51)和第六表面(52)、连接所述第五表面(51)和所述第六表面(52)的第三侧面(53)，所述第六表面(52)与所述第一表面(21)相贴，所述柔性显示面板(20)在所述第六表面(52)的正投影与所述第六表面(52)重合，所述补强胶条(10)粘接所述第一侧面(23)和所述第三侧面(53)。
  8. 根据权利要求6或7所述的柔性显示结构，其中，所述补强胶条(10)分布于所述第五表面(51)所在平面和所述支撑层(30)远离所述柔性显示面板(20)的表面所在平面之间。
  9. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述补强胶条(10)远离所述第一侧面(23)的表面为平面或平滑曲面。
  10. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述补强胶条(10)远离所述第一侧面(23)的表面与所述第一侧面(23)的间距为5μm～300μm。
  11. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述补强胶条(10)围绕所述第一侧面(23)布置。
  12. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述补强胶条(10)采用紫外-湿气双重固化胶固化形成。
  13. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述补强胶条(10)的储能模量为60kpa～150kpa，抗剪强度为3kgf/cm 2～5kgf/cm 2。
  14. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述柔性显示面板(20)和所述支撑层(30)之间设置有粘合剂层(40)，所述粘合剂层(40)在所述支撑层(30)上的正投影位于所述柔性显示面板(20)在所述支撑层(30)上的正投影内。
  15. 根据权利要求1～3任一项所述的柔性显示结构，其中，所述柔性显示面板(20)包括叠置的面板本体(201)、偏光片(202)和聚对苯二甲酸乙二醇酯薄膜(203)，所述偏光片(202)和所述聚对苯二甲酸乙二醇酯薄膜(203)分别位于所述面板本体(201)的两侧，所述聚对苯二甲酸乙二醇酯薄膜(203)和所述支撑层(30)位于所述面板本体(201)的同侧。
  16. 一种柔性显示结构的制造方法，所述方法包括：
    提供叠置的柔性显示面板和支撑层，所述柔性显示面板具有相对的第一表面和第二表面、连接所述第一表面和所述第二表面的第一侧面；
    在所述第一侧面上形成补强胶条，所述补强胶条粘接所述柔性显示面板和所述支撑层。
  17. 根据权利要求16所述的制造方法，其中，所述在所述第一侧面上形成补强胶条，包括：
    通过喷嘴在所述第一侧面喷涂紫外-湿气双重固化胶；
    使所述紫外-湿气双重固化胶固化形成所述补强胶条。
  18. 根据权利要求17所述的制造方法，其中，所述使所述紫外-湿气双重固化胶固化形成所述补强胶条，包括：
    在所述第一侧面喷涂紫外-湿气双重固化胶的同时，利用紫外光照射喷涂至所述第一侧面的所述紫外-湿气双重固化胶，至所述紫外-湿气双重固化胶固化为所述补强胶条。
  19. 根据权利要求17所述的制造方法，其中，所述使所述紫外-湿气双重固化胶固化形成所述补强胶条，包括：
    在所述第一侧面喷涂紫外-湿气双重固化胶的同时，利用紫外光照射喷涂至所述第一侧面的所述紫外-湿气双重固化胶，至所述紫外-湿气双重固化胶半固化；
    静置所述柔性显示面板至所述紫外-湿气双重固化胶完全固化。
  20. 一种显示装置，包括如权利要求1～15任一项所述的柔性显示结构。
PCT/CN2021/079928 2020-04-20 2021-03-10 柔性显示结构及其制造方法、显示装置 WO2021213048A1 (zh)

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