WO2020244255A1 - 显示屏及其制作方法、盖板和显示装置 - Google Patents

显示屏及其制作方法、盖板和显示装置 Download PDF

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Publication number
WO2020244255A1
WO2020244255A1 PCT/CN2020/076229 CN2020076229W WO2020244255A1 WO 2020244255 A1 WO2020244255 A1 WO 2020244255A1 CN 2020076229 W CN2020076229 W CN 2020076229W WO 2020244255 A1 WO2020244255 A1 WO 2020244255A1
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WO
WIPO (PCT)
Prior art keywords
area
base
display screen
cover plate
display panel
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Application number
PCT/CN2020/076229
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English (en)
French (fr)
Inventor
林立
Original Assignee
昆山国显光电有限公司
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Publication date
Application filed by 昆山国显光电有限公司 filed Critical 昆山国显光电有限公司
Publication of WO2020244255A1 publication Critical patent/WO2020244255A1/zh
Priority to US17/404,398 priority Critical patent/US20210375167A1/en

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    • 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
    • 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
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/022—Mechanical properties
    • 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
    • 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
    • G06F1/1641—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being formed by a plurality of foldable display components
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/51—Elastic
    • 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
    • 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

Definitions

  • This application relates to the field of display technology, and in particular to a display screen and a manufacturing method thereof, a cover plate and a display device.
  • the functions of terminal devices such as mobile phones have become more and more diversified, and the requirements for various performances of the display screen have gradually increased.
  • Utilizing the flexibility of the flexible display screen it can be bent or folded, thereby bringing convenience to the user's use and carrying.
  • the existing flexible display screens mostly use cover plates made of flexible or rigid materials.
  • the cover plate of the flexible material is not hard enough to protect the display screen well; while the cover plate of the rigid material has poor bendability, which is not conducive to the bending of the flexible display screen.
  • a display screen including:
  • the cover plate has a first area and a second area located on at least one side of the first area and adjacent to the first area, the cover plate is configured to be integrally bendable with the flexible display panel, so
  • the cover includes:
  • the first base is located in the first area
  • the second base is located in the second zone, and the second base and the first base are connected to each other, wherein the elastic modulus of the first base is greater than the elastic modulus of the second base Modulus.
  • the first base portion and the second base portion are arranged in regions, and the elastic modulus of the first base portion is greater than that of the second base portion, so that the display screen can correspond to the first area (flat area)
  • the part of the screen provides better flatness and hardness; while the elastic modulus of the second base is smaller, which can provide better stress absorption and impact resistance for the part of the display screen corresponding to the second zone (bending zone) Therefore, it is beneficial to the bending of the display screen and protects the sides of the display screen, so that the sides of the display screen have higher impact resistance.
  • a display device which includes the display screen described in the foregoing embodiment.
  • a cover plate having a first area and a second area located on at least one side of the first area and adjacent to the first area, the cover plate including:
  • the first base is located in the first area
  • the second base is located in the second zone, and the second base and the first base are connected to each other, wherein the elastic modulus of the first base is greater than the elastic modulus of the second base Modulus.
  • a cover plate for attachment to a flexible display panel, the cover plate having a first area and a second area adjacent to the first area, the first area being located On both sides of the second area, the cover plate includes:
  • the first base is located in the first area
  • An auxiliary cover layer is provided on the first base portion to define a receiving cavity with the flexible display panel and the first base portion;
  • the second base is located in the second area and fills the containing cavity.
  • the second base and the first base are connected to each other, wherein the elastic modulus of the first base is greater than The elastic modulus of the second base portion.
  • a method for manufacturing a display screen including:
  • the flexible display panel has a flat area and a bending area located on at least one side of the flat area and adjacent to the flat area;
  • a second base portion is formed in the bending area of the flexible display panel, wherein the elastic modulus of the first base portion is greater than the elastic modulus of the second base portion.
  • FIG. 1 is a schematic cross-sectional view of a display screen in an embodiment of the application.
  • Fig. 2 is a schematic cross-sectional view of the cover plate of the display screen shown in Fig. 1.
  • FIG. 3 is a schematic structural diagram of a cover plate of a display screen in an embodiment of the application, in which both sides of the cover plate are bent back to form an arc groove.
  • FIG. 4 is a schematic structural diagram of a U-shaped cover plate of the display screen in an embodiment of the application.
  • FIG. 5 is a schematic structural diagram of a cover plate with a 360-degree curved display screen in an embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional view of the auxiliary cover layer in an embodiment of the application.
  • FIG. 7 is a flowchart of a method for manufacturing a display screen in an embodiment of the application.
  • FIG. 8 is a flowchart of a method for manufacturing a display screen in another embodiment of the application.
  • FIG. 9 is a schematic cross-sectional view of the display screen corresponding to step S130.
  • terminal devices such as mobile phones are becoming more and more diversified.
  • terminal devices such as double-sided screens have appeared in the market.
  • most of the double-sided screen terminal equipment in the related technology is equipped with a main screen on the front and a secondary screen on the back panel. There is a metal middle frame between the main screen and the secondary screen. This kind of terminal equipment gives you both in terms of look and feel. People have a sense of fragmentation, and the user experience is not high.
  • the flexible display panel can be bent to display on the front and side of the product at the same time, as well as display on the front, side and back, so as to achieve a higher screen-to-body ratio, thereby increasing users Experience degree.
  • the material of the flexible display panel in the related art has low surface hardness and weak strength.
  • users In order to improve the service life of the flexible display panel, users should be prevented from directly operating on the flexible display panel and need to be protected by a cover plate. Therefore, for the flexible display
  • the screen and cover should also have sufficient rigidity and the ability to bend repeatedly.
  • the glass cover in the related art has a relatively high hardness (usually reaching above 7H), its bending performance is very poor.
  • the surface hardness of the flexible film cover for example, polymer film
  • the inventor found that when such a terminal device with a curved display screen falls, the hardness and impact resistance of the cover plate in the related technology cannot meet the requirements of drop resistance, especially the bending area of the flexible display screen ( The side display area) is easily in contact with the rigid interface, which causes the bending area to receive greater stress, which in turn causes the bending area of the flexible display screen to be more likely to display failure after being dropped.
  • an embodiment of the present application provides a display screen.
  • Elastic modulus refers to the stress in a unidirectional stress state divided by the strain in that direction. Specifically, the elastic modulus refers to the material in the elastic deformation stage, its stress and strain become a proportional relationship, and its proportional coefficient is called the elastic modulus. Among them, the elastic modulus is reflected in three aspects, specifically:
  • Shear modulus The shear stress divided by the shear strain equals the shear modulus of the material. For example, if a lateral force F (such as friction) is applied to a piece of elastic body, the elastic body will change from a square to a rhombus. The angle of this deformation is called “shear strain”, and the corresponding force F divided by the force area S is called It is "shear stress”.
  • Hardness refers to the ability of a material to locally resist hard objects pressed into its surface, called hardness, which is specifically divided into scratch hardness, indentation hardness, and rebound hardness.
  • Fig. 1 shows a schematic structural diagram of a display screen in an embodiment of the present application
  • Fig. 2 shows a schematic cross-sectional view of a cover plate of the display screen shown in Fig. 1.
  • Fig. 1 shows a schematic structural diagram of a display screen in an embodiment of the present application
  • Fig. 2 shows a schematic cross-sectional view of a cover plate of the display screen shown in Fig. 1.
  • Fig. 1 shows a schematic structural diagram of a display screen in an embodiment of the present application
  • Fig. 2 shows a schematic cross-sectional view of a cover plate of the display screen shown in Fig. 1.
  • the display screen 100 in an embodiment of the present application includes a flexible display panel 10 and a cover plate 20, and the flexible display panel 10 is attached to a surface of the cover plate 20.
  • the cover 20 is configured to be bendable integrally with the flexible display panel 10 to protect the flexible display panel 10 to reduce the influence of external shocks on the display panel, and to provide a certain surface hardness for the display screen 100 to facilitate subsequent terminal assembly .
  • different bending forms of the display screen 100 can realize different forms of curved display.
  • both sides of the flexible display panel 10 and the cover plate 20 may be integrally bent back to form an arc groove.
  • FIG. 3 both sides of the flexible display panel 10 and the cover plate 20 may be integrally bent back to form an arc groove.
  • the flexible display panel 10 and the cover 20 can be integrally bent into a U shape, so that the display screen 100 can realize the front of the product (for example, a mobile phone terminal) , U-shaped curved surface display on the back and one side.
  • the flexible display panel 10 and the cover plate 20 are integrally bent to form a full 360-degree surround, so that the circumference of the front, back and at least two sides of the product can be realized. To the 360-degree all-inclusive display.
  • the form in which the display screen 100 can be bent is not limited to this, but the cover 20 and the flexible display panel 10 are integrally bent, thereby protecting the display module and touch module of the flexible display panel, and reducing external impact on the display.
  • the influence of the screen 100 also provides a certain surface hardness for the display screen 100.
  • the cover plate 20 has a first area 22 and a second area 24 located on at least one side of the first area 22 and adjacent to the first area 22.
  • the first region 22 may be a straight region
  • the second region 24 may be a curved region (arc groove region)
  • the second region 24 and the first region 22 smoothly transition. It is easy to understand that when the display screen 100 is not bent, the first area 22 and the second area 24 are also flat areas, but the second area 24 is a bent area after the display screen 100 is bent.
  • the second area 24 may be located on multiple sides of the first area 22. In an embodiment, as shown in FIG.
  • the first region 22 may include a first subregion 22a and a second subregion 22b, the first subregion 22a and the second subregion 22b are located on both sides of the second region 24, respectively,
  • the two opposite sides of the second area 24 (curved area) of the cover plate 20 are respectively connected to the first sub-area 22a and the second sub-area 22b (flat area).
  • the second area 24 is located in the first area.
  • the second region 24 may include a third subregion 24a and a fourth subregion 24b; the cover plate 20 has a first subregion 22a and a second subregion 22b, and a third subregion 24a and a fourth subregion 24a.
  • Area 24b two sides of the third sub-area 24a are respectively connected to one side of the first sub-area 22a (flat area) and one side of the second sub-area 22b (flat area), the fourth sub-area The two sides of 24b are respectively connected to the other side of the first sub-region 22a (flat region) and the other side of the second sub-region 22b (flat region). More specifically, the first sub-area 22a and the second sub-area 22b are the middle area (front and back) of the cover plate 20, and are also relatively straight areas of the cover plate 20, and the second area 24 is located in the horizontal or longitudinal direction of the cover plate 20. One or both sides of the middle is a portion formed by bending back on one or both sides of the first zone 22 in the transverse or longitudinal direction.
  • the third sub-area 24a/fourth sub-area 24b located on one side of the first sub-area 22a/second sub-area 22b may be in a same shape as the first sub-area 22a/second sub-area when the display screen 100 is bent. 22b is a tangent semicircle.
  • the cover 20 and the display screen 100 may tend to bend inward, that is, bend toward the side of the flexible display panel.
  • the first sub-region 22a and the second sub-region 22b located on both sides of the second region 24 in the cover 20 are parallel to each other, that is, the bending angle of the display screen 100 is 180 degrees.
  • the first sub-region 22a and the second sub-region 22b located on both sides of the second region 24 in the cover 20 may not be parallel to each other, that is, the bending angle of the display screen 100 may be 90 degrees to 180 degrees. Between degrees, or even greater than 180 degrees.
  • the first area 22 and the second area 24 of the display screen 100 may not have a clear boundary, and the second area 24 may also include a part of the first area 22.
  • the flexible display panel 10 may be a flexible organic light emitting display panel, and specifically may be a flexible OLED light emitting display panel.
  • the flexible display panel 10 may also be other flexible and bendable screens, such as a Micro LED flexible display panel, a quantum dot flexible display panel, etc., which are not limited herein.
  • the flexible display panel 10 has a light-emitting side, and the cover plate 20 is located on the light-emitting side of the flexible display panel 10. For example, in the embodiment shown in FIG.
  • the outer surface of the flexible display panel 10 is the light-emitting surface
  • the cover plate 20 is attached to the light-emitting surface of the flexible display panel 10
  • Adhesives such as OCA adhesive layer or TPU adhesive layer can also be attached by electrostatic, which is not limited here.
  • the flexible display panel 10 includes a display panel body and a polarizer, and the polarizer is disposed between the display panel body and the cover 20. In other words, after a polarizer is attached to the light-emitting surface of the display panel body, the aforementioned cover plate 20 can be attached.
  • the cover plate 20 includes a first base portion 26 and a second base portion 28.
  • the first base portion 26 is provided in the first area 22, and the second base portion 28 is provided in the second area.
  • the second base portion 28 and the first base portion 26 are connected to each other, and the elastic modulus of the first base portion 26 is greater than the elastic modulus of the second base portion 28.
  • the first base portion 26 and the second base portion 28 may be formed of different materials.
  • the second base portion 28 may have a greater tensile strength than the first base portion 26.
  • the first base portion 26 may be formed of a material having greater hardness and flatness than the second base portion 28.
  • the elastic modulus is a measure of the ability of an object to resist elastic deformation, and from a micro point of view, it is a reflection of the bonding strength between atoms, ions or molecules.
  • the display screen 100 is bent, the display screen 100 is subjected to tensile stress and compressive stress along the bending direction.
  • the first base part 26 mainly bears tensile stress
  • the second base part 28 mainly bears compressive stress.
  • the tensile stress is less than the compressive stress.
  • the elastic modulus of the first base portion 26 is greater than the elastic modulus of the second base portion 28, which can provide better flatness and hardness for the area of the display screen 100 corresponding to the first region 22; and the second base portion 28
  • the elastic modulus of the display screen 100 is small, which can provide better stress absorption and impact resistance for the area of the display screen 100 corresponding to the second zone 24 (bending zone), thereby facilitating the bending of the display screen 100 and the resistance to the display screen 100
  • the sides are protected, so that the sides of the display screen 100 have higher impact resistance.
  • the first base part 26 and the second base part 28 are connected, which will not affect the overall hardness of the display screen 100, but will facilitate the subsequent terminal assembly and will not bring other bad experiences.
  • the molding process can also be changed.
  • the glass cover plate of the 360-degree all-enclosed screen in the related design is difficult to be attached to the flexible display panel 10, and is not conducive to subsequent terminal assembly.
  • the flexible display panel 10 can be bent into a specific shape in advance by arranging the bases with different elastic modulus in zones, and then the first base 26 and the second base 28 are formed on the flexible display panel 10.
  • the first base 26 may be strengthened glass. Tempered glass, also known as tempered glass, is glass with compressive stress on the surface, which is obtained by strengthening the glass with a tempering method. The use of strengthened glass can provide higher hardness and flatness for the first area 22 of the cover 20, and improve the impact resistance of the display screen 100.
  • the first base 26 may be ultra-thin glass. Ultra-thin glass has the rigidity of glass materials, and also takes into account a certain degree of bendability. Therefore, the use of ultra-thin glass can make the cover plate 20 of the display screen 100 ultra-thin, but also make it have better bendability and sufficient hardness.
  • the thickness of the first base portion 26 is 0.1-1 mm. It is easy to understand that the thickness of the first base 26 affects various physical properties of the cover 20 to a certain extent. For example, the greater the thickness of the cover 20, the stronger its rigidity and impact resistance, but its bending and flatness will be affected to a certain extent; the smaller the thickness of the cover 20, the greater its bending and flatness. Will be better, but the hardness and impact resistance will decrease. In addition, in order to facilitate the internal space design of terminal products such as mobile phones, the thickness of the cover plate 20 tends to be thinner, but the aforementioned hardness, flatness and impact resistance must be taken into consideration. The applicant of the present application found that the thickness range of the first base portion 26 is set to 0.1 to 1 mm, which can make the cover plate 20 ultra-thin, while having better bendability, sufficient hardness and reliable impact resistance. performance.
  • the second base portion 28 may be formed of an energy-absorbing material, that is, the second base portion 28 has a higher stress absorption capacity than the first base portion 26.
  • the second base portion 28 completely covers the second region 24 and is connected to the first base portion 26.
  • the energy-absorbing material may be an optically clear resin (OCR), which completely covers the second area 24 of the display screen 100.
  • OCR optically clear resin
  • Optically transparent resin can suppress light scattering caused by external light and backlight, has a refractive index and light transmittance similar to glass, and is resistant to yellowing, can withstand the expansion and contraction of a variety of different substrates, to resist high and low temperature changes The problem that arises.
  • the optically transparent resin has a rapid reaction molding ability to UV light, and can be produced by various methods such as dispensing or coating and cured by ultraviolet UV, and the production process is simple. It is worth emphasizing that the optically transparent resin also has a strong ability to absorb stress. When it is placed in the second zone 24, it can provide the side surface (curved surface) of the display screen 100 with strong impact resistance, thereby improving the display The reliability of the screen 100.
  • the energy absorbing material is transparent silica gel.
  • Transparent silica gel is a colorless or skin-colored oily liquid, which becomes a soft elastic material after vulcanization.
  • This elastic material can be used for a long time in the temperature range of -65°C to 200°C and maintain its soft and elastic properties, electrical properties and chemical stability, water resistance, ozone resistance, weathering resistance, non-corrosion, and physiological inertness. Non-toxic, tasteless, and low linear shrinkage.
  • the use of transparent silica gel can provide the second region 24 of the cover 20 with better hardness, flatness, and better stress absorption performance, and can also improve the reliability of the display screen 100.
  • the refractive index of the transparent silica gel can be adjusted to be suitable for display devices in different application scenarios.
  • the cover plate 20 further includes an auxiliary cover plate layer 29.
  • the auxiliary cover layer 29 is provided on the side of the first base portion 26 and the second base portion 28 away from the flexible display panel 10. In this way, the surface integrity of the display screen 100 can be improved, and a good touch feeling can be provided, and it can also play a protective role, thereby further improving the reliability of the display screen 100.
  • FIG. 6 shows a schematic cross-sectional view of the auxiliary cover layer 29 in an embodiment of the present application.
  • the auxiliary cover layer 29 has a composite laminated structure, and includes at least a flexible glass layer 292 and an organic layer 294 that are stacked on each other.
  • the rigidity of the glass material can further ensure the hardness of the cover plate 20, thereby protecting the display screen 100.
  • Utilizing the flexibility of organic materials can improve the bendability of the cover plate 20, so that the display screen 100 can achieve better bendability; and the organic material can also release part of the external force through deformation under the impact of external force to reduce the impact of external force on the cover.
  • the impact of the plate 20 and the display screen 100 improves the bendability of the cover plate 20; at the same time, after the flexible glass layer 292 is damaged due to strong external force, the fragments of the flexible glass layer 292 can adhere to the organic layer 294 to prevent fragments The scattering and damage to the display screen 100.
  • the material of the flexible glass layer 292 may be ultra-thin glass, and the material of the organic layer 294 may be selected from polyimide (PI), transparent polyamide (CPI), polyethylene (PE), and polymethyl methacrylate. (PMMA) one or more. It can be understood that the number of the flexible glass layer 292 and the organic layer 294 can be two or more, which is not limited herein.
  • the auxiliary cover layer 29 may include a An ultra-thin glass layer and a transparent polyamide (CPI) layer laminated with the ultra-thin glass layer.
  • CPI transparent polyamide
  • the number of the flexible glass layer 292 and the organic layer 294 is not limited herein, for example, both of them may be two or more layers.
  • the stacking order of the flexible glass layer 292 and the organic layer 294 is not limited, and may or may not be alternately stacked.
  • the flexible glass layer 292 and the organic layer 294 and the auxiliary cover layer 29 and the first base part 26 and the second base part 28 can be bonded by providing an optical adhesive layer 21.
  • the optical adhesive layer 21 is an optically transparent adhesive (hereinafter referred to as OCA), which is colorless and transparent, has a light transmittance of more than 90%, has good bonding strength, can be cured at room temperature or medium temperature and shrinks during curing. Small and other characteristics.
  • OCA optically transparent adhesive
  • the OCA layer can also absorb and release part of the external force, so as to reduce the impact of the external force on the cover plate 20 and the flexible display panel 10.
  • FIG. 7 shows a flowchart of a manufacturing method of the display screen 100 in an embodiment of the present application.
  • the present application also provides a manufacturing method of the display screen 100, including:
  • Step S110 Provide a flexible display panel 10
  • Step S120 forming a first base 26 in the flat area of the flexible display panel 10;
  • Step S140 forming a second base portion 28 in the bending area of the flexible display panel 10.
  • the flexible display panel 10 has a flat area and a bending area located on at least one side of the flat area.
  • the flexible display panel 10 can be folded into a predetermined shape, for example, it can be folded into a U-shaped cross-section or a 360-degree all-enclosed shape, and the flat areas are located on opposite sides of each curved area.
  • the first base 26 may be attached to the flexible display panel 10 by using the optical adhesive layer 21.
  • the optical adhesive layer 21 may be an optically transparent adhesive (hereinafter referred to as OCA).
  • the second base portion 28 formed of an energy-absorbing material may be bonded to the flexible display panel 10 through the optical adhesive layer 21, and the second base portion 28 and the first base portion 26 are connected.
  • the elastic modulus of the first base portion 26 is greater than the elastic modulus of the second base portion 28.
  • the energy-absorbing material is optically transparent resin or transparent silica gel.
  • FIG. 8 shows a flow chart of a manufacturing method of the display screen 100 in another embodiment of the present application
  • FIG. 9 shows a schematic cross-sectional view of the cover plate corresponding to step S130.
  • the first area 22 is located on both sides of the second area 24.
  • the method further includes:
  • Step S130 forming an auxiliary cover layer 29 on the first base 26 to define a receiving cavity 23 with the flexible display panel 10 and the first base 26.
  • a flexible glass layer 292 and an organic layer 294 may be sequentially formed on the first base 26 to define the aforementioned receiving cavity 23.
  • the flexible glass layer 292 and the organic layer 294 are bonded together by an optically transparent adhesive (OCA).
  • OCA optically transparent adhesive
  • the material of the flexible glass layer 292 may be ultra-thin glass
  • the organic layer 294 may be selected from polyimide (PI), transparent polyamide (CPI), polyethylene (PE), and polymethacrylate.
  • PI polyimide
  • CPI transparent polyamide
  • PE polyethylene
  • PMMA esters
  • the second base portion 28 can be formed by injecting energy absorbing material into the containing cavity 23.
  • the possibility of stress concentration during the production process and the bending process of the display screen 100 is reduced, thereby improving the reliability of the display screen 100; on the other hand, compared with the prior art, it is convenient to attach to the display panel.
  • U-shaped and 360-degree all-inclusive screens it has the advantages of easy production and assembly.
  • step S140 specifically includes:
  • An energy absorbing material is injected into the receiving cavity 23 to form the second base portion 28.
  • the energy absorbing material is optically transparent resin or transparent silica gel.
  • materials with a smaller elastic modulus in the prior art such as thermoplastic polyurethane elastomers (TPU), which are used in subsequent processes. If the temperature is higher, the flexible display panel 10 is prone to failure at a high temperature; while using injection-molded optically transparent resin or transparent silicone material, the temperature in the process is lower, and it can be molded by heat curing or UV curing. In this way, the production yield of the display screen 100 can be improved.
  • the present application also provides a cover plate 20, which is the cover plate 20 in the foregoing embodiment.
  • the first area 22 of the cover plate 20 is located on both sides of the second area 24, the cover plate 20 further includes an auxiliary cover plate layer 29, and the auxiliary cover plate layer 29 is provided on the first base portion 26 away from the flexible display panel 10.
  • One side of the flexible display panel 10 and the first base 26 define a receiving cavity 23.
  • the first base 26 corresponds to the flat area of the flexible display panel 10
  • the second base 28 corresponds to the curved area of the flexible display panel 10.
  • the second base portion 28 is filled in the receiving cavity 23 and connected to the first base portion 26; wherein an optically transparent resin or transparent silicone material can be injected into the receiving cavity 23 to form a second base portion 26 connected to the first base portion 26.
  • the present application also provides a display device, which includes the display screen 100 in the foregoing embodiment.
  • the display device can be applied to fields such as mobile phone terminals, bionic electronic devices, electronic skins, wearable devices, vehicle-mounted devices, Internet of Things devices, and artificial intelligence devices.
  • the above-mentioned display device may be a digital device such as a mobile phone, a tablet computer, a palmtop computer, an ipod player, and a smart watch.

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Abstract

一种显示屏，包括柔性显示面板(10)和盖板(20)，盖板(20)具有第一区(22)及位于第一区(22)至少一侧且与第一区(22)相邻的第二区(24)，盖板(20)被配置为与柔性显示面板(10)一体地可弯曲，盖板(20)包括：第一基底部(26)，设于第一区(22)；第二基底部(28)设于第二区(24)，第二基底部(28)与第一基底部(26)彼此连接；第一基底部(26)的弹性模量大于第二基底部(28)的弹性模量。还提供一种盖板、显示装置及显示屏的制作方法。

Description

显示屏及其制作方法、盖板和显示装置 技术领域
本申请涉及显示技术领域，特别是涉及一种显示屏及其制作方法、盖板和显示装置。
背景技术
随着显示技术的发展，例如手机等终端设备的功能越来越多样化，对于显示屏的各项性能的要求也逐渐升高。利用柔性显示屏的柔性特点，可以将其进行弯曲或折叠，从而给用户的使用和携带带来便利。然而，现有的柔性显示屏多是采用柔性或刚性材料的盖板。柔性材料的盖板硬度不够，不能对显示屏起到很好的保护作用；而刚性材料的盖板的可弯折性较差，不利于柔性显示屏的弯折。
发明内容
基于此，有必要提供一种显示屏及其制作方法、盖板和显示装置，以具有较佳的硬度和弯折性能，提高产品的可靠性。
根据本申请一个方面，提供一种显示屏，包括：
柔性显示面板；及
盖板，具有第一区及位于所述第一区至少一侧且与所述第一区相邻的第二区，所述盖板被配置为与所述柔性显示面板一体地可弯曲，所述盖板包括：
第一基底部，设于所述第一区；及
第二基底部，设于所述第二区，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
上述显示屏中，第一基底部和第二基底部分区设置，第一基底部的弹性模量大于第二基底部的弹性模量，这样可以为显示屏对应于第一区(平直区)的部分提供较佳的平面度和硬度；而第二基底部的弹性模量较小，这样可以为显示屏对应于第二区(弯曲区)的部分提供较佳的吸收应力的能力和抗冲击的能力，从而有利于显示屏的弯曲且对显示屏的侧面进行保护，以使显示屏的侧面具有较高的抗冲击能力。
根据本申请另一个方面，提供一种显示装置，包括上述实施例所述的显示屏。
根据本申请又一个方面，提供一种盖板，具有第一区及位于所述第一区至少一侧且与 所述第一区相邻的第二区，所述盖板包括：
第一基底部，设于所述第一区；及
第二基底部，设于所述第二区，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
根据本申请又一个方面，提供一种盖板，用于附接于柔性显示面板，所述盖板具有第一区及与所述第一区相邻的第二区，所述第一区位于所述第二区两侧，所述盖板包括：
第一基底部，设于所述第一区；
辅助盖板层，设于所述第一基底部上，以与所述柔性显示面板和所述第一基底部界定出容纳腔；
第二基底部，设于所述第二区，且填充满所述容纳腔，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
根据本申请再一个方面，提供一种显示屏的制作方法，包括：
提供一柔性显示面板；所述柔性显示面板具有平直区及位于所述平直区至少一侧且与平直区相邻的弯曲区；
在柔性显示面板的平直区形成第一基底部；
在柔性显示面板的弯曲区形成第二基底部，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
附图说明
图1为本申请一实施例中的显示屏的截面示意图。
图2为图1所示的显示屏的盖板的截面示意图。
图3为本申请一实施例中的显示屏的盖板的结构示意图，其中盖板的两侧向回弯折形成弧沟。
图4为本申请一实施例中的显示屏的弯曲呈U形的盖板的结构示意图。
图5为本申请一实施例中的显示屏的弯曲呈360度全包围形的盖板的结构示意图。
图6为本申请一实施例中的辅助盖板层的截面示意图。
图7为本申请一实施例中的显示屏的制作方法的流程框图。
图8为本申请另一实施例中的显示屏的制作方法的流程框图。
图9为步骤S130对应的显示屏的截面示意图。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的部分实施例。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本申请的公开内容的理解更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“及/或”包括一个或多个相关的所列项目的任意的和所有的组合。
随着通讯技术不断发展，手机等终端设备的功能越来越多样化。为满足用户对终端设备多样化、体验度高的要求，市场中除了全面屏终端设备外，又出现了例如双面屏终端设备。但是，相关技术中的双面屏终端设备，大多数前面设置一个主屏，背板设置一个副屏，主屏和副屏之间有金属中框阻隔，这种终端设备无论从观感还是手感上都给人一种割裂感，用户体验度不高。而随着柔性显示的柔性特点不断被开发利用，将柔性显示面板弯折，可同时在产品正面和侧面显示，以及正面、侧面和背面均显示，从而达到更高的屏占比，进而提高用户体验度。
相关技术中的柔性显示面板的材料表面硬度低、强度弱，为了提高柔性显示屏的使用寿命，应避免用户直接在柔性显示面板上直接进行操作，需要有盖板的保护，因此，针对柔性显示屏，盖板也应当具有足够的刚度和可反复弯折的能力。但相关技术中的玻璃盖板虽然具备了较高的硬度(通常达到7H以上)，但其弯折性能很差。而具备较好弯折性能的柔性薄膜盖板(例如，聚合物薄膜)的表面硬度较差(通常只有2H)。
与此同时，随着曲面显示技术的发展，双边曲面、四边曲面，甚至前述的360度全包屏幕显示装置正迅速走向市场。而在曲面显示技术领域中，柔性显示面板和盖板之间的贴合以及后续的终端组装也是曲面显示装置生产过程中的一项技术难点。例如，针对曲面设计趋于向内弯曲，甚至是360度全包的曲面显示装置，玻璃盖板很难进行柔性显示面板的贴合和后续的终端组装。而柔性薄膜盖板表面硬度差，难以对柔性显示面板进行保护且无法保证终端组装的正常进行。
此外，二者均不具备较强的抗外力冲击性能。例如，针对市面上出现的360度全包屏幕的终端设备，发生跌落或弯折时显示屏的可靠性是用户最关心的方面，也是用户眼中可靠性的代名词。日常使用中的跌落，大部分是从用户手中、背包或桌子上跌落，高度通常 为0.8～1.2m。发明人在研究过程中发现，针对此类具有曲面显示屏的终端设备在跌落时，相关技术中的盖板的硬度和抗冲击能力无法满足抗跌落的要求，尤其是柔性显示屏的弯曲区(侧面显示区)易与刚性界面接触，导致弯曲区会受到较大的应力，进而导致柔显示屏的弯曲区更容易在跌落后显示失效。
为解决上述问题，本申请实施例提供了一种显示屏。
在对本申请进行详细说明之前，首先对一些技术术语进行定义和解释。
弹性模量：是指单向应力状态下应力除以该方向的应变。具体而言，弹性模量是指材料在弹性变形阶段，其应力和应变成正比例关系，其比例系数称为弹性模量。其中，弹性模量体现在三个方面，具体为：
1)杨氏模量：线应力除以线应变等于材料的杨氏模量。例如，对一根细杆施加一个拉力F，拉力F除以杆的截面积S，称为“线应力”，杆的伸长量dL除以原长L，称为“线应变”。
2)剪切模量：剪切应力除以剪切应变等于材料的剪切模量。例如，对一块弹性体施加一个侧向的力F(例如摩擦力)，弹性体会由方形变为菱形，这个形变的角度称为“剪切应变”，相应的力F除以受力面积S称为“剪切应力”。
3)体积模量：体积应力除以体积应变等于体积模量。例如，对弹性体施加一个整体的压强P，这个压强称为“体积应力”，弹性体的体积减少量dV除以原来的体积V称为“体积应变”。
硬度：是指材料局部抵抗硬物压入其表面的能力称为硬度，具体分为划痕硬度、压入硬度、回跳硬度。
图1示出了本申请一实施例中的显示屏的结构示意图；图2示出了图1所示的显示屏的盖板的截面示意图。为了便于说明，仅示出了与本申请实施例相关的部分。
参阅附图1及图2，本申请一实施例中的显示屏100，包括柔性显示面板10及盖板20，柔性显示面板10附接于盖板20的一侧的表面。
盖板20被配置为与柔性显示面板10一体地可弯曲，用于保护柔性显示面板10以降低外部冲击对显示面板的影响，同时为显示屏100提供一定的表面硬度，以便于后续的终端组装。例如，显示屏100的弯折形式不同，可以实现不同形式的曲面显示。如图3所示的实施方式中(仅示出盖板20)，柔性显示面板10和盖板20的两侧可以被一体地向回弯折形成弧沟。如图4所示的实施方式中(仅示出盖板20)，柔性显示面板10和盖板20可以被一体地弯曲呈U形，这样显示屏100可以实现产品(例如，手机终端)的正面、背面 和一个侧面的U型曲面显示。如图5所示实施方式中(仅示出盖板20)，柔性显示面板10和盖板20被一体地弯曲呈360度全包围，这样可以实现产品的正面、背面和至少两个侧面的周向360度全包式显示。总而言之，显示屏100能够弯折的形式不限于此，但盖板20与柔性显示面板10一体地弯曲，从而保护柔性显示面板的显示模组以及触控模组等部件，以降低外部冲击对显示屏100的影响，同时为显示屏100提供一定的表面硬度。
盖板20具有第一区22及位于第一区22至少一侧且与第一区22相邻的第二区24。例如，结合图2至图4所示，第一区22可以为平直区，第二区24可以为弯曲区(弧沟区)，第二区24与第一区22平滑过渡。容易理解，当显示屏100未弯折时，第一区22和第二区24同样为平直区，但第二区24在显示屏100弯折后为被弯折的弯曲区。第二区24可位于第一区22多侧。在一实施例中，如图4所示，第一区22可包括第一子区22a和第二子区22b，第一子区22a和第二子区22b分别位于第二区24两侧，盖板20的第二区24(弯曲区)彼此相对的两个侧边分别与第一子区22a和第二子区22b(平直区)相连，此时，第二区24即位于第一区中任一子区的一侧。如图5所示，第二区24可包括第三子区24a和第四子区24b；盖板20具有第一子区22a和第二子区22b，以及第三子区24a和第四子区24b；第三子区24a的两个侧边分别与第一子区22a(平直区)的一个侧边和第二子区22b(平直区)的一个侧边相连，第四子区24b的两个侧边分别与第一子区22a(平直区)的另一个侧边和第二子区22b(平直区)的另一个侧边相连。更确切地说，第一子区22a和第二子区22b是盖板20的中间区域(正面和背面)，也是盖板20较为平直的区域，第二区24位于盖板20横向或纵向中的一侧或两侧，是第一区22横向或纵向的一侧或两侧具有的向回弯折形成的部分。示例地，位于第一子区22a/第二子区22b一侧的第三子区24a/第四子区24b在显示屏100弯折状态下可以呈与第一子区22a/第二子区22b相切的半圆状。
可以理解，在另一些实施例中，盖板20及显示屏100可以趋于向内弯曲，即向柔性显示面板侧弯曲。例如，如图3所示，盖板20中位于第二区24两侧的第一子区22a和第二子区22b彼此平行，也就是说，显示屏100的弯曲角度为180度。当然，在其他一些实施例中，盖板20中位于第二区24两侧的第一子区22a和第二子区22b可以不相互平行，即显示屏100的弯曲角度可以为90度～180度之间，或者甚至大于180度。显示屏100的第一区22与第二区24之间可不限定明确的界限，第二区24也可包括部分第一区22。
柔性显示面板10可以是具有柔性的有机发光显示面板，具体可以为柔性OLED发光显示面板。柔性显示面板10亦可以为其他具有柔性、能够弯曲的屏体，例如，Micro LED柔性显示面板、量子点柔性显示面板等，在此不作限定。其中，柔性显示面板10具有出 光侧，盖板20位于柔性显示面板10的出光侧。例如，如图1所示的实施例中，柔性显示面板10外侧表面为出光面，则盖板20贴合于柔性显示面板10的出光面上，盖板20和柔性显示面板10之间可通过OCA胶层或TPU胶层等胶粘，亦可通过静电贴附，在此不作限定。一些实施例中，柔性显示面板10包括显示面板本体及偏光片，偏光片设于显示面板本体与盖板20之间。换言之，可以是在显示面板本体的出光面上贴合有偏光片之后，再贴合前述的盖板20。
本申请的实施例中，如图2所示，盖板20包括第一基底部26及第二基底部28，第一基底部26设于第一区22，第二基底部28设于第二区24，第二基底部28与第一基底部26彼此连接，第一基底部26的弹性模量大于第二基底部28的弹性模量。示例地，第一基底部26和第二基底部28可以由不同的材料形成，具体地到实施方式中，第二基底部28相较于第一基底部26可以由具有更大的拉伸强度和吸收应力能力的材料形成，第一基底部26相较于第二基底部28可以由具有更大的硬度和平面度的材料形成。
应当理解的是，从宏观角度来说，弹性模量是衡量物体抵抗弹性变形能力大小的尺度，从微观角度来说，则是原子、离子或分子之间键合强度的反映。当显示屏100被弯曲，沿弯曲方向显示屏100承受有拉伸应力和压缩应力。第一基底部26主要承受拉伸应力，而第二基底部28主要承受压缩应力。通常，拉伸应力小于压缩应力。因此，第一基底部26的弹性模量大于第二基底部28的弹性模量，其可以为显示屏100对应第一区22的区域提供较佳的平面度和硬度；而第二基底部28的弹性模量较小，可以为显示屏100对应第二区24(弯曲区)的区域提供较佳的吸收应力的能力和抗冲击的能力，从而利于显示屏100的弯曲且对显示屏100的侧面进行保护，使显示屏100的侧面具有较高的抗冲击力。此外，第一基底部26和第二基底部28相连，不会影响显示屏100整体的硬度，反而有利于后续的终端组装，且不会带来其他不良体验。
值得注意，由于第一基底部26和第二基底部28分区设置，还可以改变成型工艺的方式。例如，相关设计中的360度全包屏的玻璃盖板很难与柔性显示面板10进行贴合，且不利于后续终端的组装。而采用分区设置不同弹性模量的基底部，可以预先将柔性显示面板10弯折成特定形状，再在柔性显示面板10上形成第一基底部26和第二基底部28。相较于相关技术中的成型方式，一方面，一定程度上降低了显示屏生产过程中和弯曲过程中应力集中的可能性，从而提高了显示屏的可靠性；另一方面，便于盖板与显示面板的贴合以及后续的终端组装，尤其针对U型(如图4所示)和360度全包屏(如图5所示)一类显示屏更具有便于制作和组装的优点。
一些实施例中，第一基底部26可以为强化玻璃。强化玻璃又称钢化玻璃，是表面具有压应力的玻璃，即采用钢化方法对玻璃进行增强处理而得。采用强化玻璃可以为盖板20的第一区22提供较高的硬度和平面度，且提高了显示屏100的抗冲击能力。另一些实施例中，第一基底部26可以为超薄玻璃。超薄玻璃具备玻璃材料的刚性特性，并且也兼顾一定的可弯折性。因此，使用超薄玻璃能够在使显示屏100的盖板20超薄化的同时也使其具备较好的可弯折性和足够的硬度。
进一步地，第一基底部26的厚度为0.1～1毫米。容易理解，第一基底部26的厚度一定程度上影响盖板20的各项物理性能。例如，盖板20的厚度越大，则其刚度和抗冲击性能则越强，但其弯折性、平面度会受到一定的影响；盖板20的厚度越小，其弯折性和平面度会更佳，但硬度和抗冲击性能会有所下降。此外，为了利于例如手机等终端产品的内部空间设计，盖板20厚度趋于更薄，但又要兼顾前述的硬度、平面度及抗冲击性能。本申请的申请人研究发现，将第一基底部26的厚度范围设置为0.1～1毫米，可以使盖板20超薄化的同时具备较好的可弯折性、足够的硬度及可靠抗冲击性能。
一些实施例中，第二基底部28可以由吸能材料形成，即第二基底部28相较于第一基底部26具有更高的吸收应力能力。第二基底部28完全覆盖第二区24，并与第一基底部26相连。例如，一些实施方式中，吸能材料可以为光学透明树脂(OCR，Optical Clear Resin)，其完全覆盖显示屏100的第二区24。光学透明树脂可抑制外部光照与背光等导致的光散射情况，具有与玻璃相近的折射率和透光率，且耐黄变、可承受多种不同基材的膨胀收缩率，以抵挡高低温变化产生的问题。此外，光学透明树脂对UV光照具有迅速的反应成型能力，可通过点胶或涂布等多种方式制作并利用紫外UV固化，制作工艺简单。值得强调的是，光学透明树脂还具有较强的吸收应力的能力，当其设置于第二区24，可以为显示屏100的侧面(弯曲弧面)提供较强的抗冲击能力，从而提高显示屏100的可靠性。
又例如，在另一些实施方式中，该吸能材料为透明硅胶。透明硅胶是无色或皮肤色油状液体，硫化后成为柔软的弹性材料。这种弹性材料在-65℃至200℃的温度范围内可长期使用并保持其柔软弹性性能，有电性能和化学稳定性，耐水、耐臭氧、耐气候老化，无腐蚀性，有生理惰性，无毒无味，线收缩率低。如此，采用透明硅胶可以为盖板20的第二区24提供较佳的硬度、平面度以及较佳的应力吸收性能，同样可以提高显示屏100的可靠性。可以理解，作为一种实施例，透明硅胶的折射率可调，以适用于不同的应用场景下的显示装置。
本申请的一些实施例中，如图1所示，盖板20还包括辅助盖板层29。辅助盖板层29 设于第一基底部26和第二基底部28背离柔性显示面板10的一侧。这样，可以提高显示屏100表面的完整性，并提供良好的触感，且还能够起到保护作用，从而进一步提高显示屏100的可靠性。
图6示出了本申请一实施例中的辅助盖板层29的截面示意图。
进一步地，该辅助盖板层29具有复合层叠结构，至少包括相互层叠的柔性玻璃层292和有机层294。如此，利用玻璃材料的刚性特性可以进一步保证盖板20的硬度，从而对显示屏100起到保护作用。利用有机材料的柔性特性可以提高盖板20的可弯折性，使得显示屏100实现更好的可弯折性；并且在外力冲击下有机材料也可以通过形变释放部分外力，以降低外力对盖板20及显示屏100的冲击，提高盖板20的可弯折性；同时在柔性玻璃层292因遭受强大外力而破损后，柔性玻璃层292的碎片能粘附在有机层294上，防止碎片的散落以及对显示屏100的损坏。
示例地，柔性玻璃层292的材料可以为超薄玻璃，有机层294的材料可以选自聚酰亚胺(PI)、透明聚酰胺(CPI)、聚乙烯(PE)和聚甲基丙烯酸甲酯(PMMA)中的一种或多种。可以理解，柔性玻璃层292和有机层294的数量可以为两个或两个以上，在此不作限定。考虑到辅助盖板层29的厚度，且基于提高显示屏100表面的完整性、提供良好的触感，且还能够起到保护作用的目的，作为一种实施方式，辅助盖板层29可包括一层超薄玻璃层及一层与超薄玻璃层层叠的透明聚酰胺(CPI)层。
可以理解，柔性玻璃层292和有机层294的数量在此不作限定，例如，两者均可以为两层或两层以上。且柔性玻璃层292和有机层294的层叠顺序也不作限定，可以交替层叠，亦可不交替层叠。
在一实施例中，柔性玻璃层292和有机层294之间，以及辅助盖板层29与第一基底部26和第二基底部28之间可通过设置光学胶层21进行粘结。具体地，该光学胶层21为光学透明粘接剂(以下简称OCA)，OCA具有无色透明、光透过率在90％以上、粘接强度好、可在室温或中温下固化且固化收缩小等特点。通过设置OCA粘接柔性玻璃层292和有机层294，以及粘结辅助盖板层29与第一基底部26和第二基底部28，可以在不影响显示屏100的显示效果的情况下实现稳固粘接。并且，通过OCA层的设置，当盖板20受到外力冲击时，OCA层也可以吸收和释放部分外力，以降低外力对于盖板20和柔性显示面板10的冲击力。
应当理解，本申请中可以根据不同的应用场景选取不同的粘接剂来实现柔性玻璃层292与有机层294，以及辅助盖板层29与基底部之间的粘接，所选取的粘接剂能够保证较 佳的粘接强度且不影响显示效果即可，具体类型不作限定。
图7示出了本申请一实施例中的显示屏100的制作方法的流程框图。
参阅附图7，为便于更好地理解本申请的技术效果，本申请还提供一种显示屏100的制作方法，包括：
步骤S110：提供一柔性显示面板10；
步骤S120：在柔性显示面板10的平直区形成第一基底部26；及
步骤S140：在柔性显示面板10的弯曲区形成第二基底部28。
在步骤S110中，柔性显示面板10具有平直区及位于平直区至少一侧的弯曲区。具体到实施方式中，可以将柔性显示面板10折成预定的形状，例如，可以折成截面为U型或360度全包状，平直区位于每一弯曲区的相对两侧。
在步骤S120中，可以利用光学胶层21将第一基底部26贴附于柔性显示面板10。更具体地，该光学胶层21可以为光学透明粘接剂(以下简称OCA)。
在步骤S140中，可以将由吸能材料形成的第二基底部28通过光学胶层21粘结于柔性显示面板10，且第二基底部28与第一基底部26相连。其中，所述第一基底部26的弹性模量大于所述第二基底部28的弹性模量。作为一种实施方式，该吸能材料为光学透明树脂或透明硅胶。
图8示出了本申请另一实施例中的显示屏100的制作方法的流程框图；图9示出了步骤S130对应的盖板的截面示意图。
在其中一实施例中，所述第一区22位于所述第二区24两侧。步骤S140之前，该方法还包括：
步骤S130：在第一基底部26上形成辅助盖板层29，以与柔性显示面板10和第一基底部26界定出容纳腔23。
具体地，可以在第一基底部26上依次形成柔性玻璃层292和有机层294，从而界定出前述的容纳腔23。其中，柔性玻璃层292和有机层294通过光学透明粘接剂(OCA)粘结为一体。具体到实施方式中，柔性玻璃层292的材料可以为超薄玻璃，有机层294可以选自聚酰亚胺(PI)、透明聚酰胺(CPI)、聚乙烯(PE)和聚甲基丙烯酸甲酯(PMMA)中的一种或多种。
如此，可以通过向容纳腔23内注塑吸能材料形成第二基底部28。这样，一方面，降低了生产过程及显示屏100弯曲过程中应力集中的可能性，从而提高了显示屏100的可靠性；另一方面，相比现有技术，便于与显示面板的贴合，尤其针对U型和360度全包屏更 具有便于制作和组装的优点。
在其中一实施例中，步骤S140具体包括：
在所述容纳腔23注塑吸能材料，以形成所述第二基底部28。
具体地，该吸能材料为光学透明树脂或透明硅胶。应当理解的是，现有技术中存在的相较于钢化玻璃或超薄玻璃的弹性模量较小的材料，例如热塑性聚氨酯弹性体橡胶(Thermoplastic polyurethanes，TPU)，该类材料在后续的工艺中温度较高，柔性显示面板10容易在高温下失效；而采用注塑成型光学透明树脂或透明硅胶的材料，工艺中温度较低，采用热固化或UV固化即可成型。如此，可提高显示屏100的生产良率。
基于同样的发明构思，本申请还提供一种盖板20，该盖板20为上述实施例中的盖板20。
一些实施例中，盖板20的第一区22位于第二区24的两侧，盖板20还包括辅助盖板层29，辅助盖板层29设于第一基底部26背离柔性显示面板10的一侧，以与柔性显示面板10和第一基底部26界定出容纳腔23。其中，第一基底部26对应于柔性显示面板10的平直区，第二基底部28对应于柔性显示面板10的弯曲区。第二基底部28填充于容纳腔23内，并与第一基底部26彼此连接；其中可以向容纳腔23内注塑光学透明树脂或透明硅胶的材料，以形成与第一基底部26相连的第二基底部28。
基于同样的发明构思，本申请还提供一种显示装置，该显示装置包括上述实施例中的显示屏100。
具体地，该显示装置可以应用于手机终端、仿生电子设备、电子皮肤、可穿戴设备、车载设备、物联网设备及人工智能设备等领域。例如，上述显示装置可以为手机、平板电脑、掌上电脑、ipod播放器、智能手表等数码设备。
需要说明的是，在描述位置关系时，除非另有规定，否则当一元件例如层、膜或基板被指为在另一膜层“上”时，其能够直接在另一膜层上，亦可存在一个或多个中间膜层。进一步地说，当层被指为在另一膜层“下”时，其可直接在另一膜层下方，亦可存在一个或多个中间膜层。亦可以理解的是，当膜层被指为在两膜层“之间”时，其可为两膜层之间的唯一膜层，亦可存在一个或多个中间膜层。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述。然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能 因此而理解为对本申请专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (20)

  1. 一种显示屏，包括：
    柔性显示面板；
    盖板，具有第一区及位于所述第一区至少一侧且与所述第一区相邻的第二区，所述盖板被配置为与所述柔性显示面板一体地可弯曲，所述盖板包括：
    第一基底部，设于所述第一区；及
    第二基底部，设于所述第二区，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
  2. 根据权利要求1所述的显示屏，其中，所述第二基底部相较于所述第一基底部具有更高的吸收应力能力。
  3. 根据权利要求1所述的显示屏，其中，所述第一基底部的硬度大于所述第二基底部的硬度。
  4. 根据权利要求1所述的显示屏，其中，所述第一基底部的平面度大于所述第二基底部的平面度。
  5. 根据权利要求1所述的显示屏，其中，所述第一区位于所述第二区两侧。
  6. 根据权利要求1所述的显示屏，其中，所述第一基底部的材料为强化玻璃。
  7. 根据权利要求6所述的显示屏，其中所述第一基底部的厚度范围为0.1～1毫米。
  8. 根据权利要求1所述的显示屏，其中，所述第二基底部由吸能材料形成，所述第二基底部完全覆盖所述第二区。
  9. 根据权利要求8所述的显示屏，其中所述吸能材料为光学透明树脂或硅胶。
  10. 根据权利要求1所述的显示屏，其中，所述盖板还包括辅助盖板层，所述辅助盖板层设于所述第一基底部和所述第二基底部的背离所述柔性显示面板的一侧。
  11. 根据权利要求10所述的显示屏，其中所述辅助盖板层至少包括层叠设置的柔性玻璃层和有机层。
  12. 根据权利要求11所述的显示屏，其中，所述柔性玻璃层的材料为超薄玻璃。
  13. 根据权利要求11所述的显示屏，其中，所述有机层的材料选自聚酰亚胺、透明聚酰胺、聚乙烯和聚甲基丙烯酸甲酯中的一种或多种。
  14. 根据权利要求1所述的显示屏，其中，所述柔性显示面板包括显示面板本体及偏光片，所述偏光片设于所述显示面板本体与所述盖板之间。
  15. 一种显示装置，包括权利要求1所述的显示屏。
  16. 一种盖板，具有第一区及位于所述第一区至少一侧且与所述第一区相邻的第二区，所述盖板包括：
    第一基底部，设于所述第一区；及
    第二基底部，设于所述第二区，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
  17. 一种盖板，用于附接于柔性显示面板，所述盖板具有第一区及与所述第一区相邻的第二区，所述第一区位于所述第二区两侧，所述盖板包括：
    第一基底部，设于所述第一区；
    辅助盖板层，设于所述第一基底部上，以与所述柔性显示面板和所述第一基底部界定出容纳腔；
    第二基底部，设于所述第二区，且填充满所述容纳腔，所述第二基底部与所述第一基底部彼此连接，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
  18. 一种显示屏的制作方法，包括：
    提供一柔性显示面板，所述柔性显示面板具有平直区及位于所述平直区至少一侧且与平直区相邻的弯曲区；
    在柔性显示面板的平直区形成第一基底部；
    在柔性显示面板的弯曲区形成第二基底部，其中，所述第一基底部的弹性模量大于所述第二基底部的弹性模量。
  19. 根据权利要求18所述的显示屏的制作方法，其中，所述第一区位于所述第二区两侧，所述在柔性显示面板的弯曲区形成第二基底部之前，所述制作方法还包括：
    在所述第一基底部上形成辅助盖板层，以与所述柔性显示面板和所述第一基底部界定出容纳腔。
  20. 根据权利要求19所述的显示屏的制作方法，其中
    所述在柔性显示面板的弯曲区形成第二基底部包括：
    在所述容纳腔注塑吸能材料，以形成所述第二基底部。
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