WO2017161919A1 - Bendable display substrate film, preparation method therefor, and display device - Google Patents

Bendable display substrate film, preparation method therefor, and display device Download PDF

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Publication number
WO2017161919A1
WO2017161919A1 PCT/CN2016/108986 CN2016108986W WO2017161919A1 WO 2017161919 A1 WO2017161919 A1 WO 2017161919A1 CN 2016108986 W CN2016108986 W CN 2016108986W WO 2017161919 A1 WO2017161919 A1 WO 2017161919A1
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WO
WIPO (PCT)
Prior art keywords
film
glass film
glass
display substrate
plastic film
Prior art date
Application number
PCT/CN2016/108986
Other languages
French (fr)
Chinese (zh)
Inventor
赵景罡
Original Assignee
大连东方科脉电子股份有限公司
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
Priority claimed from CN201620231266.1U external-priority patent/CN205564746U/en
Priority claimed from CN201610172080.8A external-priority patent/CN105679774B/en
Application filed by 大连东方科脉电子股份有限公司 filed Critical 大连东方科脉电子股份有限公司
Priority to JP2019500711A priority Critical patent/JP6671536B2/en
Publication of WO2017161919A1 publication Critical patent/WO2017161919A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
    • 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
    • B32B17/10—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 of synthetic resin
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
    • H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
    • H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
    • H01L21/76—Making of isolation regions between components
    • H01L21/762—Dielectric regions, e.g. EPIC dielectric isolation, LOCOS; Trench refilling techniques, SOI technology, use of channel stoppers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/12—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier the substrate being other than a semiconductor body, e.g. an insulating body

Definitions

  • the present invention relates to a flexible display substrate film, a method of manufacturing the same, and a display device.
  • liquid crystal display devices LCDs
  • organic light-emitting diode display devices OLEDs
  • electronic paper display devices E-paper
  • the substrate film having both flexibility and impact resistance becomes incapable of the curved surface display of a large panel for pursuing a realistic sense of presence, and the flexibility of a mobile terminal device pursuing portability, convenience, and safety. lack.
  • a substrate widely used in a flat panel display in the prior art is a glass substrate; if a flexible function is imparted to the glass substrate to realize a flexible display, it is possible to make the substrate have a bendable property by reducing the thickness of the substrate.
  • the thickness of the glass substrate is less than or equal to 0.1 mm
  • the glass substrate has the property of a flexible substrate film, that is, the glass film has a certain degree of flexibility similar to that of a plastic film.
  • the glass film still has serious problems such as weak bending and weak impact resistance, which causes the glass substrate film to be easily broken during the manufacturing process of the display screen, and the display screen is broken during use.
  • Occurrence especially transient over-bending, can easily cause hidden defects in the glass film, causing cracks during processing and use. Therefore, it has been one of the important research directions to study a plastic film which is excellent in impact resistance, light weight, and excellent in flexibility as a film for a display substrate instead of a glass substrate film.
  • a plastic film which is excellent in impact resistance, light weight, and excellent in flexibility as a film for a display substrate instead of a glass substrate film.
  • the negative effect of the thermal deformation of the film on the display is difficult to avoid, and the performance requirements of the display on the oxygen barrier and water vapor resistance of the film (such as oxygen barrier property and water vapor barrier property) are also Can not fufill. For this reason, it is common practice to vaporize a film made of an inorganic material on a plastic film.
  • JP-A-2004-82598 proposes a gas barrier laminate in which a metal oxide film and an organic material layer are laminated on a substrate.
  • a flexible film excellent in softness and good in gas barrier properties for example, comprising inorganic glass and a resin layer substrate disposed on both sides of the inorganic glass, and disposed on a side of the resin layer substrate on which the inorganic glass is not disposed
  • An inorganic film formed on at least one peripheral edge portion of the corresponding resin layer substrate; however, the film thus overlapped still has a problem that if the glass film is too thin, the impact resistance is insufficient to cause defects, and the glass film is too thick.
  • the bendability is significantly reduced. It can be seen that a simple superimposed glass film, a plastic film or a coating film cannot solve the problem that the bendability and impact resistance of the flexible substrate film are insufficient, and the defect is easily generated.
  • the present invention has been made in view of the above problems, and has developed a flexible display substrate film having excellent bendability and gas barrier properties, a method for manufacturing the same, and a display device.
  • a flexible display substrate film comprising:
  • the upper surface of the glass film has a plurality of convex portions
  • the lower surface of the plastic film has a plurality of recesses for accommodating the protrusions
  • a plurality of the convex portions are arranged horizontally, vertically, or in an array on the upper surface of the glass film;
  • the convex portion is provided within a predetermined distance from the edge of the glass film; when the plurality of convex portions are in the glass film When the upper surface is arranged in an array, the edge protrusion is disposed within a predetermined distance from the edge of the glass film;
  • the convex portions are semi-cylindrical, triangular prism-shaped, quadrangular prism-shaped, rectangular parallelepiped or square-shaped;
  • the convex portion is a quadrangular pyramid shape, a quadrangular prism shape, a spherical crown shape or a square shape;
  • the plastic film has a cover portion disposed opposite to an upper surface of the glass film and an edge portion disposed opposite to a side surface of the glass film;
  • the convex height of the convex portion and the concave depth of the concave portion are all less than or equal to 100 ⁇ m; the thickness of the portion of the glass film not including the convex portion is less than or equal to 100 ⁇ m;
  • the flexible display substrate film further includes:
  • An electrode disposed on a lower surface of the glass film and/or an upper surface of the plastic film;
  • a thin film transistor disposed on a lower surface of the glass film and/or an upper surface of the plastic film;
  • the width of the edge portion is greater than 100 ⁇ m; the thickness of the portion where the covering portion does not include the depressed portion is 400 ⁇ m or less; the surface waviness of the glass film is less than or equal to 0.5 ⁇ m/20 mm; the surface of the plastic film is rough The degree is less than or equal to 2 nm.
  • a method for manufacturing a flexible display substrate film for manufacturing the above-mentioned flexible display substrate film comprising the following steps:
  • the glass film and the plastic film are integrated by a lamination method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film and lower than the softening point temperature of the glass film;
  • the plastic film composited with the glass film is laser cut to obtain an edge portion of a desired size.
  • a display device comprising the flexible display substrate film according to any one of the above;
  • the display device is a liquid crystal display device, an organic light emitting diode display device, or an electronic paper display device.
  • the flexible display substrate film provided by the present invention, the manufacturing method thereof, and the display device are simple in manufacturing process and have excellent gas barrier properties.
  • the drop resistance and impact resistance of the bendable display substrate film are significantly improved by reducing the weight of the flexible display substrate film and the cushioning and damping of the plastic film. .
  • the occurrence of edge defects is effectively avoided.
  • the design of the convex portion of the glass film and the concave portion of the plastic film can effectively avoid over-bending defects and improve the thermal shock resistance and mechanical impact capability of the flexible display substrate film; at the same time, the glass film can resist water vapor and oxygen.
  • the plastic film is used as the inner surface, the oxygen and moisture infiltrated from the edge of the plastic, because the design of the convex portion or the edge projection provided at the edge of the glass film is reduced or largely blocked, the flexible display substrate film also has Similar to the gas barrier properties of the glass substrate film.
  • the present invention does not require vacuum coating, and can realize low-cost manufacturing of a flexible display device. Compared with pure glass film, it has better bendability and display performance with the same life.
  • the convex portion of glass film and the depression of plastic film can suppress thermal expansion of the plastic film having a high linear expansion coefficient, and a display substrate film having a small linear expansion coefficient can be obtained by using a glass film as a display reference surface.
  • the fracture of the glass film is caused by minute defects of the surface caused by stress concentration, and the thinner the thickness of the glass film, the more easily the film is broken, so that it is difficult to achieve thinning of the glass film.
  • the gas barrier property of the display substrate film does not require a complicated film structure, and can avoid the defects of the glass film, improve the tolerance to the manufacturing process environment, and the manufacturing cost is low.
  • FIG. 1 is a schematic structural view of a display substrate film according to the present invention.
  • FIG. 2 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention.
  • FIG. 3 is a schematic view showing the structure of a glass film according to an embodiment of the present invention.
  • FIG. 4 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural view showing a glass film according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view showing a glass film according to an embodiment of the present invention.
  • Fig. 7 is a schematic structural view showing a glass film according to an embodiment of the present invention.
  • FIG. 8 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention.
  • FIG. 9 is a schematic view showing the structure of a glass film according to an embodiment of the present invention.
  • Figure 10 is a flow chart of the manufacturing method of the present invention.
  • a flexible display substrate film comprises: a glass film 1 ;
  • the surface has a plurality of protrusions 10; a plastic film 2 covering the glass film 1; the lower surface of the plastic film 2 has a plurality of recesses 20 for accommodating the protrusions 10; further, a plurality of The raised portions 10 are laterally arranged, longitudinally arranged, or arranged in an array on the upper surface of the glass film 1; further, when the plurality of raised portions 10 are laterally arranged or longitudinally arranged on the upper surface of the glass film 1, at a distance Predetermined distance from the edge of the glass film 1
  • the raised portion 10 is disposed in a range; when the plurality of raised portions 10 are arranged in an array on the upper surface of the glass film 1, an edge protrusion 11 is provided within a predetermined distance from the edge of the glass film 1 Further,
  • Electrode configuration a thin film transistor of the lower surface of the glass film 1 and/or the upper surface of the plastic film 2; further, the width of the edge portion 22 is greater than 100 ⁇ m; the thickness of the portion of the covering portion 21 not including the depressed portion 20 is less than or equal to 400 ⁇ m;
  • the surface waviness of the glass film 1 is less than or equal to 0.5 ⁇ m / 20 mm; the surface roughness of the plastic film 2 is less than or equal to 2 nm;
  • FIG. 1 is a schematic structural view of the display substrate film of the present invention, and the pattern filling portions in FIG. The recessed portion 20 on the plastic film 2 and the raised portion 10 on the glass film 1 are.
  • a method for manufacturing a flexible display substrate film as shown in FIG. 10 for manufacturing the above-mentioned flexible display substrate film comprising the following steps:
  • the glass film 1 and the plastic film 2 are integrated by a lamination method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film 2 and lower than the softening point temperature of the glass film 1;
  • the plastic film 2 integrated with the glass film 1 is laser cut to obtain the edge portion 22 of a desired size.
  • a display device comprising the flexible display substrate film according to any one of the above;
  • the display device is a liquid crystal display device, an organic light emitting diode display device, or an electronic paper display device.
  • the bending property of the flexible display substrate film provided by the present invention the material of the glass film 1, the material of the plastic film 2, the thickness of the glass film 1, the thickness of the plastic film 2, the shape of the convex portion 10, and the convexity
  • the distribution density of the starting portion 10 is directly related. Specifically, for the glass film 1, the thicker the glass film 1 is, the more difficult it is to bend, the heavier the weight, and the less likely to be dominant after being impacted by an external force.
  • the thickness of the glass film 1 is not necessary for improving the gas barrier property because even the glass film 1 having a thickness of 1 ⁇ m has a very high gas barrier ability; although the convex portion on the glass film 1 is increased
  • the distribution density of 10 increases the weight of the glass film 1, but this has a limited effect on the bendability of the display substrate film; for the plastic film 2, the thickness of the plastic film 2 is increased.
  • the weight will also increase, but it is advantageous for improving the mechanical impact resistance of the glass film 1, and the water blocking performance and the oxygen barrier property are improved.
  • the plastic film 2 Since the glass film 1 has sufficient gas barrier properties and water resistance, the plastic film 2 The thickness is only considered to be resistant to mechanical impact; in addition, the increase in the thickness of the plastic film 2 causes the transmittance of the display substrate to decrease, which offsets the bendable Display means efforts to reduce the film thickness of the substrate of the display.
  • a thin glass film 1 in order to improve the water blocking performance and gas barrier performance of the display substrate film, only a thin glass film 1 can be used, and the glass film 1 has a good bendability as the thickness is reduced.
  • the glass film 1 and the plastic film 2 are simply superimposed, it is difficult to avoid the occurrence of dominant or recessive defects, which is due to thermal shock, difference in expansion ratio of the glass film 1 and the plastic film 2, and glass in addition to mechanical impact.
  • the convex portion 10 is provided on the surface of the glass film 1, so that the glass film 1 has a strength close to that of the thicker glass film 1 when subjected to external impact and thermal shock; on the glass film 1
  • the convex portion 10 is received in the recessed portion 20 on the plastic film 2 to form a mosaic structure, which is advantageous for reducing the displacement caused by the difference in the expansion ratio, releasing the stress of the glass film 1 and preventing excessive stress accumulation, and compensating for the glass film 1 during bending.
  • the difference in elasticity from the plastic film 2 prevents the generation of peeling force.
  • the convex portion 10 of the present invention is arranged horizontally, vertically, or in an array on the upper surface of the glass film 1; the convex portion 10 is a quadrangular pyramid, a quadrangular prism, a spherical crown, a semi-cylindrical, and a third Prismatic, quadrangular, cuboid or cube.
  • FIG. 2 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention
  • FIG. 3 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention; as shown in FIG. 2 and FIG.
  • the convex portion 10 on the glass film 1 is set to have a triangular prism shape, preferably a triangular prism shape whose longitudinal section is an isosceles triangle, and the plurality of convex portions 10 are horizontally arranged on the upper surface of the glass film 1.
  • the thickness of the portion of the glass film 1 excluding the convex portion 10 is t g
  • the thickness of the portion of the plastic film 2 excluding the depressed portion 20 is t p
  • the convex height of the convex portion 10 and the concave depth of the depressed portion 20 are h
  • the center-to-center spacing between adjacent convex portions 10 is W
  • the maximum width of the convex portion 10 is W g , which is adjacent to the plastic film 2 support recesses 20 between the protrusions 23 of the maximum width W p
  • the radius of curvature of the convex portion 10 is R g
  • usually flexible display substrate film is greater than the radius of curvature of the plastic film 2, i.e., the radius of curvature R ⁇ R p
  • the supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 functions to support the glass film 1, ensuring that the glass film 1 does not excessively bend; likewise, the analysis shows that the substrate film is directed to the glass film 1 side.
  • Curved love The glass film 1 is provided with the convex portion 10, and the plastic deformation of the glass film 1 is negligible, so when the display substrate film is bent toward the glass film 1 side, the convex portion 10 on the glass film 1 is applied to the plastic film 2 With the support function, the bendable display substrate film can also not produce excessive bending, ensuring that the glass film 1 does not cause defects.
  • the maximum width of the support protrusion 23 of the plastic film 2 is larger than the maximum width of the convex portion 10 of the glass film 1. Due to the characteristics of the plastic film 2 itself, the support protrusion 23 portion 10 does not affect The bending property of the plastic film 2, and when the size of the boss portion 10 is large, the peeling of the support protrusion 23 on the plastic film 2 and the convex portion 10 of the glass film 1 tends to occur when the display substrate film is bent. expansion coefficient of the plastic film 2 is not effective in inhibiting binding between the glass material and a plastic material is not firmly against the glass film stress release.
  • FIG. 4 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention
  • FIG. 5 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention, as shown in FIG. 4 and FIG.
  • the convex portion 10 has a quadrangular prism shape
  • a quadrangular prism shape having an isosceles trapezoidal longitudinal section is preferred, and a plurality of convex portions 10 are laterally arranged on the upper surface of the glass film 1, assuming an isosceles trapezoidal shape.
  • the bottom width is W g0
  • the minimum width of the support protrusion 23 between the adjacent recessed portions 20 on the plastic film 2 is W p0
  • the bendable display substrate film has a longitudinal (vertical direction) bendability.
  • the plastic material has a large elastic deformation range, so R p is also much smaller than the radius of curvature of the glass film 1 in practical application, and if the convex height value of the convex portion 10 is [1 ⁇ m, 100 ⁇ m], the convexity
  • the maximum width of the portion 10 (the lower base width of the isosceles trapezoid) W g belongs to [1 ⁇ m, 100 ⁇ m], and W p0 is equal to 50 ⁇ m, then R g and R p are respectively less than 290 ⁇ m, which is much smaller than the glass film 1 having a thickness of 100 ⁇ m.
  • the radius of curvature (on the order of millimeters), the arrangement of the bosses 10 does not affect the bending property of the glass film 1 itself, and the support protrusions 23 between the adjacent recesses 20 do not affect the bending property of the plastic film 2 itself;
  • the support protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 is played under the plastic deformation condition of the plastic film 2 after the bending due to the presence of the plastic film 2.
  • the glass film 1 is supported to ensure that the glass film 1 does not excessively bend.
  • the analysis shows that the substrate film is bent toward the glass film 1 side.
  • the glass film 1 is provided with the convex portion 10, and the plasticity of the glass film 1 is provided.
  • the radius of curvature of the display substrate film having the convex portion 10 being a quadrangular prism is larger than the radius of curvature of the display substrate film having the triangular prism shape of the convex portion 10, so that the glass film is formed.
  • the use of the quadrangular prism structure of the convex portion 10 is more advantageous for avoiding excessive bending of the display substrate film;
  • W p> W g it is advantageous to reduce the weight of the display substrate film, preferably W p ⁇ 2W g, using prevent defects;
  • plastic film support boss projecting portion 23 is greater than the maximum width of the glass film 10 1 2
  • the maximum width due to the characteristics of the plastic film 2 itself, the support protrusion 23 portion 10 does not affect the bending property of the plastic film 2, and when the size of the boss portion 10 is large, plastic is likely to appear when the display substrate film is bent.
  • the convex portion 10 on the glass film 1 excessively affects the bending effect, and the weight of the display substrate film is increased; when the plurality of convex portions 10 are longitudinally arranged on the upper surface of the glass film 1
  • the description process of the plurality of convex portions 10 arranged in the lateral direction is the same except that the bending direction of the substrate film is displayed.
  • FIG. 6 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention.
  • the boss portion 10 has a quadrangular pyramid shape, and preferably a plurality of boss portions 10 is arranged in an array on the upper surface of the glass film 1, showing that the substrate film can be bent laterally or vertically Bending, but the bending effect in other directions is slightly worse, and the distribution density of the convex portions 10 is a spatially uniform array distribution, that is, the bottom edges of the respective convex portions 10 in the same direction are parallel, and the center of the bottom surface of each convex portion 10 is When the distances are equal, the apex distances of the convex portions 10 are equal, thereby ensuring the uniformity of bending of the display substrate film.
  • the convex portion 10 has a bending characteristic of the quadrangular pyramidal display substrate film in the lateral direction and the longitudinal direction, and the bending property of the display substrate film having the triangular portion of the convex portion 10, respectively, and the influence factors in other bending directions are complicated.
  • the bending effect is not good, and it is not recommended that the display substrate film of this embodiment be bent in other directions.
  • Fig. 7 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention.
  • the boss portion 10 has a quadrangular prism shape, and preferably a plurality of boss portions. 10 is arranged in an array on the upper surface of the glass film 1, and the bendability is slightly poor, but it is more advantageous to avoid excessive bending of the glass film 1.
  • the distribution density of the protrusions 10 is a spatially uniform array distribution, that is, the respective convex portions.
  • the sides of the upper and lower bottom surfaces of 10 are parallel, and the center distances of the adjacent upper and lower bottom surfaces of each convex portion 10 are equal and evenly distributed, thereby ensuring the uniformity of bending of the display substrate film.
  • the convex portion 10 has a bending characteristic of the quadrangular prism-shaped display substrate film in the lateral direction and the longitudinal direction, and the bending property of the display substrate film having the quadrangular prism shape of the convex portion 10, respectively, and the influence factors in other bending directions are complicated.
  • the bending effect is not good, and it is not recommended that the display substrate film of this embodiment be bent in other directions.
  • the bending effect is similar to the case where the convex portion 10 has a triangular prism shape and a quadrangular prism shape, and can be used in the actual processing of the display substrate film.
  • the radius and distribution density of the boss 10 are adjusted to obtain satisfactory bending performance.
  • the convex portion 10 in the preferred embodiment has the same bending property analysis process in which the upper surface of the glass film 1 is laterally aligned or longitudinally aligned, except that the bending direction of the substrate film is different.
  • FIG. 8 is a schematic view showing a configuration of a display substrate film according to an embodiment of the present invention
  • FIG. 9 is a view showing a configuration of a glass film 1 according to an embodiment of the present invention, as shown in FIGS. 8 and 9
  • the convex portion 10 on the glass film 1 has a spherical crown shape
  • the convex portion 10 has an equal bending ability in any direction, and it is difficult to quantitatively analyze the radius of curvature of the convex portion 10.
  • the bending property of the display substrate film in the longitudinal or lateral direction is similar to that of the display substrate film in which the convex portion 10 is semi-cylindrical, and the radius and distribution density of the convex portion 10 can be adjusted during the actual processing of the display substrate film to obtain satisfactory Bending performance.
  • the number of the convex portions 10 distributed in the edge portion of the upper surface of the glass film 1 is larger than the number of the convex portions 10 distributed in the non-edge regions of the upper surface of the glass film 1; the weakest region of the glass film 1
  • the area where the defect is most likely to occur is an area in which the edge portion of the glass film 1 extends inward by several millimeters, and the purpose of providing the boss 10 in this area is to prevent edge defects and to effectively reduce Low generation of various defects.
  • the shape of the convex portion 10 may be designed to have a triangular shape, a trapezoidal shape, an arc shape, a semicircular shape or a semi-elliptical shape according to actual conditions; when the sum of the thickness of the glass film 1 and the height of the convex portion 10 is greater than 0.1 mm,
  • the plurality of convex portions 10 disposed on the edge region of the glass film 1 are aligned with the plurality of convex portions 10 disposed in the non-edge regions (internal regions) of the glass film 1 in the bending direction and the arrangement density, without affecting the bendability;
  • the plurality of convex portions 10 are longitudinally arranged or laterally arranged, it is ensured that the edge portion of the glass film 1 has the convex portion 10, and the bending property is preferentially ensured, and the impact resistance is inferior.
  • the plurality of convex portions 10 are arranged in an array, it is ensured that the number of the convex portions 10 distributed in the edge regions is larger than the number of the convex portions 10 distributed in the non-edge regions, and the bending property is preferentially ensured, and the impact resistance is inferior. .
  • the sum of the thickness of the glass film 1 and the protrusion height of the boss 10 is more than 0.1 mm, the bendability is high, and it is conceivable to design the edge of the glass film 1 to be completely closed or mostly closed, without considering the internal
  • the convex portion 10 is structured such that the display substrate film has a stronger ability to withstand edge impact, but the bending property is weak.
  • the protrusion height of the convex portion 10 and the depression depth of the concave portion 20 are both 100 ⁇ m or less; the higher the protrusion height of the convex portion 10 on the glass film 1 is, the more favorable it is to maintain
  • the mechanical stability of the glass film 1 itself is disadvantageous in that the bending property is deteriorated and the weight is heavy.
  • the supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 serves to support the glass film 1, and the thicker the support protrusion 23 is. The stronger the support.
  • the thickness of the portion of the glass film 1 excluding the convex portion 10 is 100 ⁇ m or less. It has been experimentally verified that various alkali glass or alkali-free glass have good bendability when the thickness is less than 100 ⁇ m.
  • the plastic film 2 includes a cover portion 21 disposed opposite to the glass film 1 and two edge portions 22 respectively disposed on both sides of the cover portion 21, the cover portion 21 not including a recess portion
  • the thickness of the portion of 20 is less than or equal to 400 ⁇ m.
  • the edge portion The width of 22 is greater than 100 ⁇ m, the thickness is less than or equal to 600 ⁇ m, and the thickness of the edge portion 22 is equal to the sum of the thickness of the cover portion 21 of the plastic film 2 and the thickness of the portion of the glass film 1 not including the projection 10, by wrapping the outer edge of the glass film 1.
  • the setting of the edge area can effectively reduce the probability of occurrence of defects.
  • the thickness of the display substrate film is uniform, that is, the thickness of the portion of the glass film 1 not including the convex portion 10, the convex height of the convex portion 10, and the covering portion 21 not including the concave portion
  • the sum of the thicknesses of the portions of the portion 20 is equal to the thickness of the display substrate film, and the edge portion of the plastic film 2
  • the thickness of the minute 22 is also equal to the thickness of the display substrate film and is 600 ⁇ m or less; the thinner the thickness of the display substrate film, the better the bendability.
  • the thickness of the glass film 1 is lowered, the bendability is improved, the weight of the entire display substrate film is reduced, and the drop resistance is improved.
  • the thickness of the glass film 1 is only a few micrometers, the bending property of the display substrate film is close to that of the plastic film 2, and the gas barrier property can still be comparable to that of a general glass substrate.
  • the thickness of the plastic film 2 affects the transmittance of the display substrate film. When the display substrate film is used as a non-backplane, the thickness of the plastic film 2 is reduced as much as possible, and the transmittance of the entire substrate is improved.
  • the surface waviness of the glass film 1 is less than or equal to 0.5 ⁇ m / 20 mm; the surface roughness of the plastic film 2 is less than or equal to 2 nm; when the lower surface of the glass film 1 is used as a display reference surface, The grinding method can effectively reduce the waviness to meet the requirements of the display substrate film; the plastic film 2 is easy to be bent due to the bending, the waviness is easy to be corrected during the processing, and the surface roughness is an indicator that needs more attention than the waviness. .
  • the display substrate film further includes an electrode disposed on a lower surface of the glass film 1 and/or an upper surface of the plastic film 2; the electrode type is divided into a transparent electrode and a non-transparent electrode.
  • the transparent electrode may be made of ITO material, PEDOT material, carbon nanotube material or graphene material;
  • the non-transparent electrode may be a metal electrode, specifically, a metal electrode such as aluminum, silver or copper; and the electrode is attached to the glass film. 1
  • the surface has the advantage of being able to withstand high temperature processing, showing that the substrate film has good thermal stability; when the temperature changes, the size of the plastic film 2 changes, it does not affect the electrode geometry, and has high heat stability.
  • the electrode is attached to the surface of the plastic film 2
  • a lower process temperature is required, but the electrode has very good bendability, especially an organic electrode material, such as a PEDOT material.
  • an organic electrode material such as a PEDOT material.
  • the display substrate film further includes a thin film transistor disposed on the lower surface of the glass film 1 and/or the upper surface of the plastic film 2; the thin film transistor type may be an organic thin film transistor or an inorganic thin film transistor as needed. If the thin film transistor is an inorganic thin film transistor, it is advantageous to be disposed on the side of the glass film 1.
  • the glass film 1 can withstand higher temperature processing without deformation, specifically, such as a-Si (amorphous silicon) thin film transistor, p -Si (polysilicon) thin film transistor, LTPS (low temperature polysilicon) thin film transistor, IGZO (indium gallium zinc oxide) thin film transistor, etc., can be placed on the glass side to adapt to the existing process manufacturing environment, if an organic TFT is used, that is, an OTFT (organic film)
  • the transistor When the transistor is provided, it can be disposed on the side of the glass film 1 or the plastic film 2 to satisfy the process manufacturing environment, but it is disposed on the side of the glass film 1, and the active device is manufactured with good dimensional stability and high uniformity, which is advantageous for the transistor.
  • the plastic film 2 needs to select a high-temperature resistant material such as a PI film or a PEN film, and at the same time in the manufacturing process. Some adjustments are needed to meet the thermal stability requirements of the materials.
  • the present invention further provides a display device comprising the flexible display substrate film according to any of the above embodiments; preferably, the display device may be a liquid crystal display device, an organic light emitting diode display device or an electronic paper display
  • the display device is a liquid crystal display device
  • a liquid crystal display device of different display modes such as TN (twisted nematic), STN (super twisted nematic), IPS, PDLC, Ch-LCD, VA, and FLC can be fabricated.
  • the liquid crystal display device of the TN display mode can be classified into two types: passive and active.
  • the plastic film 2 side can be used as the inner surface of the liquid crystal cell, or the glass film 1 side can be used as the The inner surface, or the side of the plastic film 2 and the side of the glass film 1 are respectively used as the inner surface, and the combination of the inner surface of the liquid crystal cell is low due to the low temperature of the manufacturing process environment, and the thickness uniformity of the liquid crystal cell is not high.
  • the glass film 1 is used as the inner surface of the liquid crystal cell, the manufacturing process environment in the process of manufacturing the liquid crystal cell can be satisfied, the expansion ratio is low, and the precision of the active device can be precisely controlled.
  • the plastic film 2 can be considered as the inner surface of the liquid crystal cell, and the flexible display substrate film of the liquid crystal display device is used in two. It is required that the bending directions of the two display substrate films are uniform. Specifically, assuming that one of the plurality of convex portions 10 of the display substrate film is longitudinally aligned on the glass film 1, the plurality of convex portions 10 of the other display substrate film are in the glass.
  • the film 1 is arranged longitudinally or in an array, and assuming that a plurality of convex portions 10 of the substrate film are laterally arranged on the glass film 1, the other plurality of convex portions 10 of the display substrate film are on the glass film 1. Horizontally arranged or arranged in an array.
  • liquid crystal display devices There are many kinds of liquid crystal display devices, and the material combination is selective. In the actual application process, according to the characteristics of the film and the manufacturing process environment, the optimal combination is not listed here. No matter which combination is used, the flexible display substrate film can be achieved. The purpose of bending can effectively avoid the occurrence of excessive bending defects, and the gas barrier property is not inferior to the pure glass substrate thin film liquid crystal cell.
  • the display device may be an organic light emitting diode display device, and when the display device is an organic light emitting diode display device, a display device capable of forming a top or bottom light; an organic light emitting diode (OLED) may be divided according to a driving principle.
  • OLED organic light emitting diode
  • active-driven OLEDs have more stringent requirements on charge mobility and uniformity than active-powered liquid crystal display devices because OLEDs are current-type devices.
  • materials constituting OLEDs such as The organic light-emitting layer, the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are all organic materials, and are more sensitive to oxygen molecules and water molecules, so that the gas barrier property of the display substrate film is very high, and reference is made.
  • the above related description of the liquid crystal display device, the bendable display substrate film is a very suitable form, because the OLED uses a single layer of a flexible display substrate film, and the electrodes and display materials are laminated, so the curved form seems to be easy to implement.
  • the flexible display substrate film can be used not only as a display substrate film, but also as a protection
  • the substrate film of the back electrode is used at a low cost; the structure of the flexible display substrate film has a resistance
  • the performance of the gas film can achieve the bending of the entire OLED display device when the arrangement direction of the protrusions 10 and the bending direction required for the display substrate film are uniform.
  • the glass film 1 is The plurality of raised portions 10 may be arranged longitudinally or in an array.
  • the display substrate film When the display substrate film is required to be laterally curved, the plurality of raised portions 10 on the glass film 1 may be arranged side by side or in an array; since no coating is required The process can achieve high gas barrier properties and reduce the cost of the OLED display device.
  • the display device may be an electronic paper display device; using the above flexible display substrate film to fabricate a driving back plate, the cost of the flexible electronic paper display can be effectively reduced; the electronic paper display is mainly satisfied with the replacement of the paper, and the low cost is basic requirements.
  • the flexible display substrate film can meet the requirements by using the inexpensive plastic film 2 and the glass film 1, and create conditions for the popular use of electronic paper.
  • the present invention also provides a method for manufacturing a flexible display substrate film for manufacturing the above-described flexible display substrate film, and comprising the steps of: forming a plurality of convex portions 10 on the upper surface by calendering or etching.
  • the glass film 1 and the plastic film 2 are integrated by a pressing method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film 2 and lower than the softening point temperature of the glass film 1; and the plastic film integrated with the glass film 1 2 Laser cutting is performed to obtain the edge portion 22 of a desired size.
  • both the glass film 1 and the plastic film 2 use a plate-like material, which is advantageous for forming the high-precision protrusions 10, and is also advantageous for increasing the tightness of the combination of the two materials, and at the same time, the glass film 1 and the plastic film 2 even There are a few defects, which are also automatically repaired during the heating process of the manufacturing method; the laminating process usually does not require the use of an adhesive, and can be compounded by simple heating, when the superposed plastic film 2 and the glass film 1 are directly When bonding is difficult, it is conceivable to use a transparent adhesive for bonding.
  • the invention has simple manufacturing process, excellent gas barrier property and low cost. Since the thickness of the glass film 1 is easily adjusted, it is easy to reduce the weight of the film of the flexible display substrate, and the shock absorption of the film is utilized to make the film of the curved display substrate have high drop resistance and mechanical shock resistance.
  • the thickness of the glass film 1 is significantly increased, thereby improving the thermal shock resistance of the display substrate film; the convex portion 10 is disposed on the edge of the glass film 1, supplemented by the wrapping of the plastic film 2, The occurrence of edge defects is effectively avoided; the design of the convex portion 10 of the glass film 1 and the recess portion 20 of the plastic film 2 can effectively avoid over-bending defects and improve the thermal shock resistance and mechanical impact capability of the flexible display substrate film;
  • the glass film 1 can function as a water blocking and oxygen barrier.
  • the oxygen and moisture infiltrated from the edge of the plastic are reduced or largely blocked by the design of the edge protrusions 11, and the gas barrier property of the entire display substrate film is realized, and an expensive vacuum-plated inorganic film is not required.
  • the structure can avoid the defects of the glass film 1 and improve the tolerance to the manufacturing process environment, and can realize a low-cost bendable display.
  • the produced OLED display device has display performance of the same lifetime as that of the single glass film 1, and is therefore particularly suitable for use in long-life display device manufacturing.
  • the convex portion 10 of the glass film 1 and the depressed portion 20 of the plastic film 2 can suppress thermal expansion of the plastic film 2 having a high linear expansion coefficient, thereby obtaining a display substrate film material having a small linear expansion coefficient, and is suitable for a high resolution display device. Applications.
  • the rupture of the glass film 1 is caused by a small defect in which the stress concentrates on the surface, and the thickness of the glass film 1 becomes thinner, and the rupture is more likely to occur, so that it is difficult to achieve thinning, and the display substrate film of the present invention is
  • the convex portion 10 having a proper shape and density disposed on the surface of the glass film 1 remarkably enhances the strength and toughness of the glass film 1 itself, and the plastic film 2 reduces the impact of the external force impact, so that the tearing stress in the direction of the defect during deformation is alleviated. Excellent substrate properties can be obtained, so that secondary workability and operability can be significantly improved.
  • the invention can avoid the occurrence of defect of the substrate film due to excessive bending, and has the characteristics of strong rigidity, low expansion ratio and good planar ductility, and at the same time has excellent oxygen barrier and water vapor barrier properties, and is non-transparent or transparent.
  • the form can be realized, the processing is simple and the cost is low, and the substrate film has the characteristics of high temperature tolerance by selecting the high temperature resistant plastic film 2 material. Low cost, high reliability, can avoid the dominant or hidden defects caused by external impact, and is durable.
  • All the edges (sides) of the glass film 1 of the present invention are surrounded by the plastic film 2; the plastic film 2 and the glass film 1 are integrally bonded by heat bonding or using a transparent adhesive, and the surfaces of the glass film 1 and the plastic film 2 are integrated. Both are smooth planes; glass film 1 is preferably made of alkali glass and alkali-free glass material, and plastic film 2 is preferably made of materials such as PET, PEN, TAC and PI.
  • the glass film 1 (including the convex portion 10) is made of alkali-free glass, and the plastic film 2 is made of PEN material;
  • the boss portion 10 is formed in a triangular prism shape and arranged laterally on the surface of the glass film 1, preferably a triangular prism having a longitudinal section of an isosceles triangle, and a center between adjacent convex portions 10.
  • the pitch W is 80 ⁇ m
  • the maximum width of the support protrusion 23 between the adjacent depressed portions 20 is 80 ⁇ m
  • the maximum width W g of the convex portion 10 is 80 ⁇ m
  • the convex height h of the convex portion 10 is 100 ⁇ m;
  • the supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 cooperates with the convex portion 10 on the glass film 1 to form a mixed layer having a thickness of about 100 ⁇ m, and the bending property mainly depends on the glass film 1 The bending ability of the boss 10.
  • the presence of the support protrusions 23 between the adjacent depressed portions 20 on the plastic film 2 serves as a buffering effect, and the plastic film is neglected under the condition of plastic deformation of the plastic film 2.
  • the support protrusions 23 of 2 function to support the glass film 1, ensuring that the glass film 1 does not cause excessive bending defects.
  • the convex portion 10 on the glass film 1 supports the plastic film 2, and the plastic film 2 does not excessively bend, thereby ensuring that the glass film 1 does not cause defects.
  • the thickness t g of the portion other than the convex portion 10 of the glass film 1 is 100 ⁇ m
  • the thickness t p of the portion of the plastic film 2 other than the depressed portion 20 is 200 ⁇ m
  • the thickness of the entire display substrate film is 400 ⁇ m
  • the curvature is bendable.
  • the radius depends on the radius of curvature of the glass film 1.
  • the boss portion 10 is formed in a quadrangular prism shape and arranged laterally on the surface of the glass film 1, preferably in a quadrangular prism shape having an isosceles trapezoidal longitudinal section, and an upper base width W g0 of the isosceles trapezoid.
  • the radius of curvature of the glass film 1 is larger than the radius of curvature of the triangular portion 10 of the convex portion 10, but is much smaller than the radius of curvature of the glass film 1 having a thickness of 100 ⁇ m, so that the convex portion 10 does not affect the bending property of the glass film 1;
  • the supporting protrusions 23 between the adjacent depressed portions 20 cooperate with the convex portions 10 on the glass film 1 to form a mixed layer having a thickness of about 100 ⁇ m, and the bending property mainly depends on the bending ability of the convex portion 10 on the glass film 1. .
  • the presence of the support protrusions 23 between the adjacent depressed portions 20 on the plastic film 2 serves as a buffering function, and the support protrusions 23 of the plastic film 2 serve to support the glass film 1 under the condition of ignoring the plastic deformation of the plastic film 2.
  • the effect is to ensure that the glass film 1 does not cause excessive bending defects.
  • the convex portion 10 on the glass film 1 is applied to the plastic film 2 With the support effect, the plastic film 2 also does not excessively bend, ensuring that the glass film 1 does not cause defects.
  • the convex portion 10 has a radius of curvature of a quadrangular prism shape larger than that of the convex portion 10 as a triangular prism shape, so when the bending property of the glass film 1 is low, a quadrangular prism is used.
  • the raised portion 10 is more advantageous in avoiding excessive bending of the bendable display substrate film.
  • the thickness t g of the portion other than the convex portion 10 of the glass film 1 is 100 ⁇ m
  • the thickness t p of the portion of the plastic film 2 other than the depressed portion 20 is 200 ⁇ m
  • the thickness of the entire display substrate film is 400 ⁇ m
  • the curvature is bendable.
  • the radius depends on the radius of curvature of the glass film 1.
  • the protrusions 10 are arranged in a quadrangular pyramid shape and arranged in an array on the surface of the glass film 1.
  • the pyramidal geometry of the protrusions 10 is 80 ⁇ m on the low side and 100 ⁇ m on the height.
  • the longitudinal center-to-center or lateral center-to-center distance between the bosses 10 is 120 ⁇ m
  • the thickness of the portion of the glass film 1 excluding the boss portion 10 is 100 ⁇ m
  • the thickness of the portion of the plastic film 2 excluding the recessed portion 20 is 200 ⁇ m
  • the geometry of the recess 20 is also a low side length of 80 ⁇ m and a height of 100 ⁇ m.
  • Entire display The thickness of the substrate film is 400 ⁇ m, and the radius of curvature depends on the glass film 1, and the optimum bending direction is along the bottom side of the quadrangular pyramid.
  • the protrusions 10 are arranged in a quadrangular shape and arranged in an array on the surface of the glass film 1.
  • the quadrangular geometry of the protrusions 10 is 40 ⁇ m on the upper side and the side on the bottom side is 80 ⁇ m, height is 100 ⁇ m, the center distance between the upper and lower surfaces of each convex portion 10 is 120 ⁇ m, or the center distance between the lower bottom surfaces of the convex portions 10 is 120 ⁇ m, and the thickness of the glass film 1 excluding the convex portion 10
  • the thickness of the plastic film 2 other than the depressed portion 20 is 200 ⁇ m, and the geometrical size of the depressed portion 20 of the plastic film 2 is also 40 ⁇ m in the upper bottom side, 80 ⁇ m in the lower bottom side, and 100 ⁇ m in height.
  • the thickness of the entire flexible display substrate film is 400 ⁇ m, and the bendable radius of curvature depends on the glass film 1, and the optimum bending direction is along the bottom edge direction of the quadrangular prism.
  • the protrusions 10 are spherically shaped and arranged in an array on the surface of the glass film 1.
  • the spherical crown of the protrusion 10 has a radius of 120 ⁇ m and a height of 100 ⁇ m.
  • the center distance between the bottom surfaces of the convex portions 10 is 160 ⁇ m, the thickness of the glass film 1 except the convex portion 10 is 100 ⁇ m, the thickness of the plastic film 2 except the concave portion 20 is 200 ⁇ m, and the concave portion of the plastic film 2 is spherical.
  • the geometrical dimensions are a radius of the bottom surface of 100 ⁇ m and a height of 100 ⁇ m, and the center distance of the bottom surface of each convex portion 10 is 160 ⁇ m.
  • the thickness of the entire flexible display substrate film is 400 ⁇ m, and the bendable radius of curvature depends on the glass film 1, and there is no fixed optimum bending direction, which is substantially the same in each bending direction.
  • Edge projections 11 are also provided on the upper surface of the glass film 1, and the edge projections 11 are located within a predetermined distance from the edge of the glass film 1. These edge projections 11 can effectively reduce the occurrence of various defects.
  • the convex cross-sectional shape is designed to be triangular, trapezoidal, curved, semi-circular or semi-elliptical.
  • the cross-sectional shape is set to a semicircle with a radius of 100 ⁇ m and a height of 100 ⁇ m.
  • the edge protrusion 11 can also be designed with reference to the convex shape, distribution direction and density on the glass film 1.
  • the disadvantage is that it does not necessarily have an optimum protection effect, and the advantage is that the substrate film of any area is matched, and the bending property is consistent with the substrate film.
  • the edge protrusion 11 is provided in a closed shape to more effectively prevent the occurrence of defects without affecting the bending property.
  • alkali glass such as soda glass and neutral borosilicate glass
  • alkali-free glass mainly alkali-free aluminosilicate glass
  • the glass has good chemical stability and electrical insulation; preferably, the width of the edge portion 22 of the plastic film 2 is selected to be 500 ⁇ m; when the surface of the glass film 1 is used as a display reference surface, the surface of the glass film 1 is ground by grinding.
  • the waviness is equal to 0.3 ⁇ m / 20 mm.
  • a glass substrate having a thickness of 0.3 mm is melted, and a glass film 1 having a plurality of convex portions 10 having a triangular prism shape is formed by a calendering method, wherein the glass film 1 has a thickness of 100 ⁇ m excluding the convex portion 10, and the convex portion
  • the protrusion height of 10 is 100 ⁇ m, and the maximum width of the protrusion 10 is 100 ⁇ m; laser cutting of the formed glass film 1 is performed to obtain a glass film 1 of a desired size, and the edge of the glass film 1 is longitudinally triangular prism-shaped.
  • the shape, the lateral convex distribution density and the direction are consistent with the inside of the glass film 1; the glass film 1 and the plastic film 2 are cleaned and dried; the plastic film 2 having a thickness of 400 ⁇ m is covered on the glass film 1 to ensure that the outer edge of the plastic film 2 is larger than The glass film is 11 mm, and the glass film 1 and the plastic film 2 are integrated by a lamination method; the width of the edge portion 22 of the plastic film 2 is corrected to 500 ⁇ m by laser cutting, and the thickness of the edge portion 22 of the plastic film 2 is 350 ⁇ m; The surface of the film 1 was such that the surface waviness of the glass film 1 was equal to 0.3 ⁇ m / 20 mm, and the thickness of the entire flexible display substrate film was 350 ⁇ m.
  • a plurality of convex portions 10 having a quadrangular prism shape are formed on a glass substrate having a thickness of 100 ⁇ m by an etching method, and a thickness of a portion of the glass film 1 excluding the convex portion 10 is 50 ⁇ m, and a convex height of the convex portion 10 is 50 ⁇ m, the maximum width of the convex portion 10 is 50 ⁇ m, the closed protrusion of the edge of the glass film 1 is a triangular prism shape, the height is 50 ⁇ m, and the width is 50 ⁇ m; the formed glass film 1 is laser-cut to obtain a desired size.
  • the glass film 1 ensures that the periphery of the glass is surrounded by a triangular prism shape; the glass film 1 and the plastic film 2 are cleaned and dried; the plastic film 2 having a thickness of 200 ⁇ m is covered on the glass film 1 to ensure that the outer edge of the plastic film 2 is larger than the glass. 11 mm, the glass film 1 and the plastic film 2 are integrated by lamination; the width of the edge portion 22 of the plastic film 2 is 500 ⁇ m by laser cutting, and the thickness of the edge portion 22 of the plastic film 2 is 200 ⁇ m;
  • the surface of the glass film 1 has a surface waviness of 0.5 ⁇ m/20 mm, the thickness of the entire flexible display substrate film is 200 ⁇ m, and the thickness of the plastic film 2 is 100 ⁇ m.
  • the plastic film 2 is made of a PEN material, and the lamination method has a film deposition temperature of 300 ° C, and the plastic film 2 can be formed to uniformly cover the surface of the glass film 1.

Abstract

A bendable display substrate film, a preparation method therefor, and a display device. The bendable display substrate film comprises: a glass film (1), the upper surface of the glass film (1) having multiple protruding portions (10); and a plastic film (2) covering the glass film (1), the lower surface of the plastic film (2) having multiple recessed portions (20) used for accommodating the protruding portions (10). The multiple protruding portions (10) are arranged horizontally, longitudinally, or in an array on the upper surface of the glass film (1). The bendable display substrate film has a simple preparation process and excellent gas and vapor barrier properties. To avoid fractures or cracks of the glass film caused by mechanical shock and thermal shock, drop resistance and shock resistance of the bendable display substrate film are significantly improved by reducing the weight of the bendable display substrate film and using the cushioning and shock absorption functions of the plastic film.

Description

可弯曲显示基板薄膜及其制造方法、显示装置Flexible display substrate film, manufacturing method thereof, and display device 技术领域Technical field
本发明涉及一种可弯曲显示基板薄膜及其制造方法、显示装置。The present invention relates to a flexible display substrate film, a method of manufacturing the same, and a display device.
背景技术Background technique
近年来，在移动终端显示设备和电视等需求的推动下，液晶显示装置(LCD，Liquid Crystal Display)、有机发光二极管显示装置(OLED，Organic Light-emitting Diode)和电子纸显示装置(E-paper，Electronic paper)等在显示屏幕薄型化、轻量化和柔性化方面正在不断取得进展。目前，对于追求逼真临场感的大型面板的曲面显示，以及追求便携性、便利性和安全性的移动终端设备的可挠性化而言，兼具柔性与耐冲击性的基板薄膜变得不可或缺。In recent years, liquid crystal display devices (LCDs), organic light-emitting diode display devices (OLEDs), and electronic paper display devices (E-paper) have been driven by the demand for mobile terminal display devices and televisions. , Electronic paper), etc. are making progress in thinning, lightweight and flexible display screens. At present, the substrate film having both flexibility and impact resistance becomes incapable of the curved surface display of a large panel for pursuing a realistic sense of presence, and the flexibility of a mobile terminal device pursuing portability, convenience, and safety. lack.
现有技术中的平板显示屏广泛使用的基板为玻璃基板；若对玻璃基板赋予柔性功能而实现柔性化显示，通过降低基板厚度使得基板具有可弯曲特性，是可能的。当玻璃基板厚度小于等于0.1mm时，玻璃基板则具有可弯曲基板薄膜的特性，即玻璃薄膜具有一定程度的类似于塑料薄膜的可弯曲性。但是，玻璃薄膜仍然会产生如下严重问题：因弯曲程度比较弱和耐冲击性弱，而导致玻璃基板薄膜在显示屏的制造工序中容易碎裂，显示屏在使用过程中发生碎裂也时有发生，特别是瞬间过度弯曲容易造成玻璃薄膜的隐性缺陷，造成以后加工和使用过程中发生龟裂。因此，研究使用耐冲击性优异、轻量、以及柔软性优异的塑料薄膜作为显示屏基板用薄膜，来代替玻璃基板薄膜也是重要研究方向之一。不过若仅使用塑料薄膜，薄膜热形变给显示所带来的负面影响也很难避免，而且显示屏对薄膜的阻氧、阻水蒸气的性能要求(例如氧气阻隔性、水蒸气阻隔性)也不能满足。正因如此，通常做法是在塑料薄膜上蒸镀无机材料构成的膜层，这样的膜层成本很高且效果并不十分理想，不利于降低显示器成本及提高显示屏的寿命，阻碍可弯曲显示屏获得更广泛的应用。为了提高塑料薄膜的阻氧、阻水气的性能，JP特开2004-82598的日本专利提出了在基材上层叠有金属氧化物膜和有机材料层的阻气性层叠材料，这种方式是有代表性的做法之一，但是在要求阻氧、阻水气的性能的有机电致发光显示装置中，上述日本专利中所采用的层叠材料的阻气性仍然不充分；由此自然想到，通过多层叠加实现柔 软性优异且阻气性性能良好的柔性薄膜，例如，包含无机玻璃及分别配置于该无机玻璃两侧的树脂层基材、并在其中一树脂层基材的未配置无机玻璃的一侧配置无机薄膜，且该无机薄膜形成在相应的树脂层基材的至少单面周缘部；不过这样重叠的薄膜仍然存在问题：玻璃薄膜过薄，则耐冲击力不足容易产生缺陷，玻璃薄膜过厚则可弯曲性显著下降。可见简单的叠加玻璃薄膜、塑料薄膜或镀膜，均无法解决可弯曲基板薄膜的可弯曲性和耐冲击力不足，进而容易产生缺陷的强度问题。A substrate widely used in a flat panel display in the prior art is a glass substrate; if a flexible function is imparted to the glass substrate to realize a flexible display, it is possible to make the substrate have a bendable property by reducing the thickness of the substrate. When the thickness of the glass substrate is less than or equal to 0.1 mm, the glass substrate has the property of a flexible substrate film, that is, the glass film has a certain degree of flexibility similar to that of a plastic film. However, the glass film still has serious problems such as weak bending and weak impact resistance, which causes the glass substrate film to be easily broken during the manufacturing process of the display screen, and the display screen is broken during use. Occurrence, especially transient over-bending, can easily cause hidden defects in the glass film, causing cracks during processing and use. Therefore, it has been one of the important research directions to study a plastic film which is excellent in impact resistance, light weight, and excellent in flexibility as a film for a display substrate instead of a glass substrate film. However, if only a plastic film is used, the negative effect of the thermal deformation of the film on the display is difficult to avoid, and the performance requirements of the display on the oxygen barrier and water vapor resistance of the film (such as oxygen barrier property and water vapor barrier property) are also Can not fufill. For this reason, it is common practice to vaporize a film made of an inorganic material on a plastic film. Such a film is costly and not very satisfactory, which is disadvantageous for reducing display cost and improving the life of the display, and hindering the bendable display. Screens are available for a wider range of applications. In order to improve the oxygen barrier property of the plastic film, the Japanese patent of JP-A-2004-82598 proposes a gas barrier laminate in which a metal oxide film and an organic material layer are laminated on a substrate. One of the representative practices, but in an organic electroluminescence display device which requires oxygen barrier properties and water vapor barrier properties, the gas barrier properties of the laminate materials used in the above Japanese Patent are still insufficient; Soft by multiple layers A flexible film excellent in softness and good in gas barrier properties, for example, comprising inorganic glass and a resin layer substrate disposed on both sides of the inorganic glass, and disposed on a side of the resin layer substrate on which the inorganic glass is not disposed An inorganic film formed on at least one peripheral edge portion of the corresponding resin layer substrate; however, the film thus overlapped still has a problem that if the glass film is too thin, the impact resistance is insufficient to cause defects, and the glass film is too thick. The bendability is significantly reduced. It can be seen that a simple superimposed glass film, a plastic film or a coating film cannot solve the problem that the bendability and impact resistance of the flexible substrate film are insufficient, and the defect is easily generated.
发明内容Summary of the invention
本发明针对以上问题的提出，而研制一种具有优异的可弯曲性能和阻气性能的可弯曲显示基板薄膜及其制造方法、显示装置。The present invention has been made in view of the above problems, and has developed a flexible display substrate film having excellent bendability and gas barrier properties, a method for manufacturing the same, and a display device.
本发明的技术手段如下：The technical means of the present invention are as follows:
一种可弯曲显示基板薄膜，包括：A flexible display substrate film comprising:
玻璃薄膜；所述玻璃薄膜上表面具有多个凸起部；a glass film; the upper surface of the glass film has a plurality of convex portions;
包覆所述玻璃薄膜的塑料薄膜；所述塑料薄膜下表面具有多个用于容纳所述凸起部的凹陷部；a plastic film covering the glass film; the lower surface of the plastic film has a plurality of recesses for accommodating the protrusions;
进一步地，多个所述凸起部在玻璃薄膜上表面横向排列、纵向排列、或者呈阵列式排列；Further, a plurality of the convex portions are arranged horizontally, vertically, or in an array on the upper surface of the glass film;
进一步地，当多个凸起部在玻璃薄膜上表面横向排列或纵向排列时，在距所述玻璃薄膜边缘的预定距离范围内设置有所述凸起部；当多个凸起部在玻璃薄膜上表面呈阵列式排列时，在距所述玻璃薄膜边缘的预定距离范围内设置有边缘凸起；Further, when the plurality of convex portions are arranged laterally or longitudinally on the upper surface of the glass film, the convex portion is provided within a predetermined distance from the edge of the glass film; when the plurality of convex portions are in the glass film When the upper surface is arranged in an array, the edge protrusion is disposed within a predetermined distance from the edge of the glass film;
进一步地，当多个凸起部在玻璃薄膜上表面横向排列或纵向排列时，所述凸起部为半圆柱形、三棱柱形、四棱柱形、长方体形或正方体形；当多个凸起部在玻璃薄膜上表面呈阵列式排列时，所述凸起部为四棱锥形、四棱台形、球冠形或正方体形；Further, when the plurality of convex portions are arranged laterally or longitudinally on the upper surface of the glass film, the convex portions are semi-cylindrical, triangular prism-shaped, quadrangular prism-shaped, rectangular parallelepiped or square-shaped; When the upper surface of the glass film is arranged in an array, the convex portion is a quadrangular pyramid shape, a quadrangular prism shape, a spherical crown shape or a square shape;
进一步地，所述塑料薄膜具有：与所述玻璃薄膜上表面相对设置的覆盖部分和与所述玻璃薄膜侧面相对设置的边缘部分；Further, the plastic film has a cover portion disposed opposite to an upper surface of the glass film and an edge portion disposed opposite to a side surface of the glass film;
进一步地，further,
所述凸起部的凸起高度、以及凹陷部的凹陷深度均小于等于100μm；所述玻璃薄膜不包括凸起部的部分的厚度小于等于100μm；The convex height of the convex portion and the concave depth of the concave portion are all less than or equal to 100 μm; the thickness of the portion of the glass film not including the convex portion is less than or equal to 100 μm;
所述可弯曲显示基板薄膜还包括： The flexible display substrate film further includes:
配置于玻璃薄膜下表面和/或塑料薄膜上表面的电极；An electrode disposed on a lower surface of the glass film and/or an upper surface of the plastic film;
配置于玻璃薄膜下表面和/或塑料薄膜上表面的薄膜晶体管；a thin film transistor disposed on a lower surface of the glass film and/or an upper surface of the plastic film;
进一步地，所述边缘部分的宽度大于100μm；所述覆盖部分不包括凹陷部的部分的厚度小于等于400μm；所述玻璃薄膜的表面波纹度小于等于0.5μm/20mm；所述塑料薄膜的表面粗糙度小于等于2nm。Further, the width of the edge portion is greater than 100 μm; the thickness of the portion where the covering portion does not include the depressed portion is 400 μm or less; the surface waviness of the glass film is less than or equal to 0.5 μm/20 mm; the surface of the plastic film is rough The degree is less than or equal to 2 nm.
一种可弯曲显示基板薄膜制造方法，用于制造上述所述的可弯曲显示基板薄膜，且包括如下步骤：A method for manufacturing a flexible display substrate film for manufacturing the above-mentioned flexible display substrate film, comprising the following steps:
利用压延法或蚀刻法成型上表面具有多个凸起部的玻璃薄膜；Forming a glass film having a plurality of convex portions on the upper surface by calendering or etching;
对成型后的玻璃薄膜进行激光切割，得到所需尺寸的玻璃薄膜；Laser cutting the formed glass film to obtain a glass film of a desired size;
对玻璃薄膜和塑料薄膜进行清洗干燥；Cleaning and drying glass film and plastic film;
将塑料薄膜包覆到玻璃薄膜上；Coating a plastic film onto the glass film;
利用层压法将玻璃薄膜和塑料薄膜复合一体；进行层压时的加热温度高于塑料薄膜的软化点温度且低于玻璃薄膜的软化点温度；The glass film and the plastic film are integrated by a lamination method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film and lower than the softening point temperature of the glass film;
对与玻璃薄膜复合一体的塑料薄膜进行激光切割得到所需尺寸的边缘部分。The plastic film composited with the glass film is laser cut to obtain an edge portion of a desired size.
一种显示装置，具有上述任一项所述的可弯曲显示基板薄膜；A display device comprising the flexible display substrate film according to any one of the above;
所述显示装置为液晶显示装置、有机发光二极管显示装置或电子纸显示装置。The display device is a liquid crystal display device, an organic light emitting diode display device, or an electronic paper display device.
由于采用了上述技术方案，本发明提供的可弯曲显示基板薄膜及其制造方法、显示装置，制造工艺简单，具有优异的阻气性。为避免机械冲击和热冲击造成玻璃薄膜断裂或裂纹产生，通过降低可弯曲显示基板薄膜重量、以及利用塑料薄膜的缓冲减震，使得可弯曲显示基板薄膜的抗跌落和耐冲击性得到了显著提高。通过在玻璃薄膜边缘具有凸起部，并辅以塑料薄膜的包裹，有效避免了边缘缺陷的发生。玻璃薄膜的凸起部和塑料薄膜的凹陷部的设计，能够有效避免过弯曲缺陷，提高可弯曲显示基板薄膜的热耐冲击和机械冲击能力；同时玻璃薄膜可起到阻水蒸汽、阻氧气的作用；当塑料薄膜作为内表面时，从塑料边缘渗入的氧气和水分，因为设置在玻璃薄膜边缘的凸起部或边缘凸起的设计被降低或大部分被阻隔，可弯曲显示基板薄膜也具有和玻璃基板薄膜类似的阻气性。本发明不需要真空镀膜，可以实现可弯曲显示装置的低成本制造。和单纯玻璃薄膜相比，可弯曲性能更优，具有相同寿命的显示性能，特别适合用于长寿命的有机电致发光显示装置的制造；玻璃薄膜的凸起部和塑料薄膜的凹陷 部可抑制具有高线性膨胀系数的塑料薄膜的热膨胀，通过使用玻璃薄膜做显示基准面，进而获得线性膨胀系数较小的显示基板薄膜。一般而言，玻璃薄膜的断裂是由应力集中造成表面的微小缺陷而引起的，玻璃薄膜厚度变薄则越容易产生断裂，故玻璃薄膜难以实现薄型化，在本发明所述显示基板薄膜中，由于在玻璃薄膜表面配置合适形状和适中密度的凸起部，显著增强玻璃薄膜自身的耐冲击特性，同时塑料薄膜以及附着于其表面的支撑凸起能缓冲外力冲击，使形变时朝向缺陷撕裂方向上的应力得以抑制，获得柔软性优异的可弯曲显示基板薄膜，同时能适应现有的制造工艺，显示装置加工过程的环境温度和变形及搬运过程的冲击产生缺陷的概率都很低。综上所述，显示基板薄膜的阻气性实现不需要复杂的薄膜结构，又能避免玻璃薄膜的缺陷，提高对制造工艺环境的耐受力，制造成本低廉。Since the above technical solution is adopted, the flexible display substrate film provided by the present invention, the manufacturing method thereof, and the display device are simple in manufacturing process and have excellent gas barrier properties. In order to avoid the breakage or crack of the glass film caused by mechanical shock and thermal shock, the drop resistance and impact resistance of the bendable display substrate film are significantly improved by reducing the weight of the flexible display substrate film and the cushioning and damping of the plastic film. . By having a raised portion at the edge of the glass film and wrapping it with a plastic film, the occurrence of edge defects is effectively avoided. The design of the convex portion of the glass film and the concave portion of the plastic film can effectively avoid over-bending defects and improve the thermal shock resistance and mechanical impact capability of the flexible display substrate film; at the same time, the glass film can resist water vapor and oxygen. When the plastic film is used as the inner surface, the oxygen and moisture infiltrated from the edge of the plastic, because the design of the convex portion or the edge projection provided at the edge of the glass film is reduced or largely blocked, the flexible display substrate film also has Similar to the gas barrier properties of the glass substrate film. The present invention does not require vacuum coating, and can realize low-cost manufacturing of a flexible display device. Compared with pure glass film, it has better bendability and display performance with the same life. It is especially suitable for the manufacture of long-life organic electroluminescent display devices; the convex portion of glass film and the depression of plastic film The portion can suppress thermal expansion of the plastic film having a high linear expansion coefficient, and a display substrate film having a small linear expansion coefficient can be obtained by using a glass film as a display reference surface. In general, the fracture of the glass film is caused by minute defects of the surface caused by stress concentration, and the thinner the thickness of the glass film, the more easily the film is broken, so that it is difficult to achieve thinning of the glass film. In the display substrate film of the present invention, Due to the arrangement of the appropriate shape and moderate density of the convex portion on the surface of the glass film, the impact resistance of the glass film itself is remarkably enhanced, and the plastic film and the supporting protrusion attached to the surface thereof can buffer the external force impact, and tear the deformation toward the defect during the deformation. The stress in the direction is suppressed, and a flexible display substrate film excellent in flexibility is obtained, and at the same time, it can adapt to the existing manufacturing process, and the probability of occurrence of defects in the ambient temperature and deformation of the display device processing process and the impact of the handling process are low. In summary, the gas barrier property of the display substrate film does not require a complicated film structure, and can avoid the defects of the glass film, improve the tolerance to the manufacturing process environment, and the manufacturing cost is low.
附图说明DRAWINGS
图1是本发明所述显示基板薄膜的结构示意图；1 is a schematic structural view of a display substrate film according to the present invention;
图2是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图；2 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention;
图3是表示本发明的一实施方式所涉及的玻璃薄膜的结构示意图；3 is a schematic view showing the structure of a glass film according to an embodiment of the present invention;
图4是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图；4 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention;
图5是表示本发明的一实施方式所涉及的玻璃薄膜的结构示意图；FIG. 5 is a schematic structural view showing a glass film according to an embodiment of the present invention; FIG.
图6是表示本发明的一实施方式所涉及的玻璃薄膜的结构示意图；6 is a schematic structural view showing a glass film according to an embodiment of the present invention;
图7是表示本发明的一实施方式所涉及的玻璃薄膜的结构示意图；Fig. 7 is a schematic structural view showing a glass film according to an embodiment of the present invention;
图8是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图；8 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention;
图9是表示本发明的一实施方式所涉及的玻璃薄膜的结构示意图；9 is a schematic view showing the structure of a glass film according to an embodiment of the present invention;
图10是本发明所述制造方法的流程图。Figure 10 is a flow chart of the manufacturing method of the present invention.
图中：1、玻璃薄膜，2、塑料薄膜，10、凸起部，11、边缘凸起，20、凹陷部，21、覆盖部分，22、边缘部分，23、支撑凸起。In the figure: 1, glass film, 2, plastic film, 10, raised portion, 11, edge protrusion, 20, depressed portion, 21, covering portion, 22, edge portion, 23, supporting protrusion.
具体实施方式detailed description
如图1、图2、图3、图4、图5、图6、图7、图8和图9所示的一种可弯曲显示基板薄膜，包括：玻璃薄膜1；所述玻璃薄膜1上表面具有多个凸起部10；包覆所述玻璃薄膜1的塑料薄膜2；所述塑料薄膜2下表面具有多个用于容纳所述凸起部10的凹陷部20；进一步地，多个所述凸起部10在玻璃薄膜1上表面横向排列、纵向排列、或者呈阵列式排列；进一步地，当多个凸起部10在玻璃薄膜1上表面横向排列或纵向排列时，在距所述玻璃薄膜1边缘的预定距 离范围内设置有所述凸起部10；当多个凸起部10在玻璃薄膜1上表面呈阵列式排列时，在距所述玻璃薄膜1边缘的预定距离范围内设置有边缘凸起11；进一步地，当多个凸起部10在玻璃薄膜1上表面横向排列或纵向排列时，所述凸起部10为半圆柱形、三棱柱形、四棱柱形、长方体形或正方体形；当多个凸起部10在玻璃薄膜1上表面呈阵列式排列时，所述凸起部10为四棱锥形、四棱台形、球冠形或正方体形；进一步地，所述塑料薄膜2具有：与所述玻璃薄膜1上表面相对设置的覆盖部分21和与所述玻璃薄膜1侧面相对设置的边缘部分22；进一步地，所述凸起部10的凸起高度、以及凹陷部20的凹陷深度均小于等于100μm；所述玻璃薄膜1不包括凸起部10的部分的厚度小于等于100μm；所述可弯曲显示基板薄膜还包括：配置于玻璃薄膜1下表面和/或塑料薄膜2上表面的电极；配置于玻璃薄膜1下表面和/或塑料薄膜2上表面的薄膜晶体管；进一步地，所述边缘部分22的宽度大于100μm；所述覆盖部分21不包括凹陷部20的部分的厚度小于等于400μm；所述玻璃薄膜1的表面波纹度小于等于0.5μm/20mm；所述塑料薄膜2的表面粗糙度小于等于2nm；图1是本发明所述显示基板薄膜的结构示意图，图1中的图案填充部分分别示意的是塑料薄膜2上的凹陷部20和玻璃薄膜1上的凸起部10。As shown in FIG. 1 , FIG. 2 , FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 , FIG. 7 , FIG. 8 and FIG. 9 , a flexible display substrate film comprises: a glass film 1 ; The surface has a plurality of protrusions 10; a plastic film 2 covering the glass film 1; the lower surface of the plastic film 2 has a plurality of recesses 20 for accommodating the protrusions 10; further, a plurality of The raised portions 10 are laterally arranged, longitudinally arranged, or arranged in an array on the upper surface of the glass film 1; further, when the plurality of raised portions 10 are laterally arranged or longitudinally arranged on the upper surface of the glass film 1, at a distance Predetermined distance from the edge of the glass film 1 The raised portion 10 is disposed in a range; when the plurality of raised portions 10 are arranged in an array on the upper surface of the glass film 1, an edge protrusion 11 is provided within a predetermined distance from the edge of the glass film 1 Further, when the plurality of convex portions 10 are laterally arranged or longitudinally arranged on the upper surface of the glass film 1, the convex portions 10 are semi-cylindrical, triangular prism-shaped, quadrangular prism-shaped, rectangular parallelepiped or square-shaped; When the plurality of convex portions 10 are arranged in an array on the upper surface of the glass film 1, the convex portion 10 has a quadrangular pyramid shape, a quadrangular prism shape, a spherical crown shape or a square shape; further, the plastic film 2 has: a cover portion 21 disposed opposite to an upper surface of the glass film 1 and an edge portion 22 disposed opposite to a side surface of the glass film 1; further, a protrusion height of the boss portion 10, and a recess depth of the recess portion 20 The thickness of the portion of the glass film 1 excluding the convex portion 10 is less than or equal to 100 μm; the flexible display substrate film further includes: disposed on the lower surface of the glass film 1 and/or the upper surface of the plastic film 2. Electrode; configuration a thin film transistor of the lower surface of the glass film 1 and/or the upper surface of the plastic film 2; further, the width of the edge portion 22 is greater than 100 μm; the thickness of the portion of the covering portion 21 not including the depressed portion 20 is less than or equal to 400 μm; The surface waviness of the glass film 1 is less than or equal to 0.5 μm / 20 mm; the surface roughness of the plastic film 2 is less than or equal to 2 nm; FIG. 1 is a schematic structural view of the display substrate film of the present invention, and the pattern filling portions in FIG. The recessed portion 20 on the plastic film 2 and the raised portion 10 on the glass film 1 are.
如图10所示的一种可弯曲显示基板薄膜制造方法，用于制造上述所述的可弯曲显示基板薄膜，且包括如下步骤：A method for manufacturing a flexible display substrate film as shown in FIG. 10 for manufacturing the above-mentioned flexible display substrate film, comprising the following steps:
利用压延法或蚀刻法成型上表面具有多个凸起部10的玻璃薄膜1；Forming a glass film 1 having a plurality of convex portions 10 on the upper surface by calendering or etching;
对成型后的玻璃薄膜1进行激光切割，得到所需尺寸的玻璃薄膜1；Laser-cutting the formed glass film 1 to obtain a glass film 1 of a desired size;
对玻璃薄膜1和塑料薄膜2进行清洗干燥；Cleaning and drying the glass film 1 and the plastic film 2;
将塑料薄膜2包覆到玻璃薄膜1上；Coating the plastic film 2 onto the glass film 1;
利用层压法将玻璃薄膜1和塑料薄膜2复合一体；进行层压时的加热温度高于塑料薄膜2的软化点温度且低于玻璃薄膜1的软化点温度；The glass film 1 and the plastic film 2 are integrated by a lamination method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film 2 and lower than the softening point temperature of the glass film 1;
对与玻璃薄膜1复合一体的塑料薄膜2进行激光切割得到所需尺寸的边缘部分22。The plastic film 2 integrated with the glass film 1 is laser cut to obtain the edge portion 22 of a desired size.
一种显示装置，具有上述任一项所述的可弯曲显示基板薄膜；A display device comprising the flexible display substrate film according to any one of the above;
所述显示装置为液晶显示装置、有机发光二极管显示装置或电子纸显示装置。The display device is a liquid crystal display device, an organic light emitting diode display device, or an electronic paper display device.
本发明提供的可弯曲显示基板薄膜的弯曲性能与玻璃薄膜1的材质、塑料薄膜2的材质、玻璃薄膜1的厚度、塑料薄膜2的厚度、凸起部10的形状、凸 起部10的分布密度均有直接关系，具体地，对于玻璃薄膜1来说，玻璃薄膜1的厚度越厚，越难于弯曲，重量也越重，同时在受到外力冲击后也不容易产生显性缺陷和隐性缺陷；故增加玻璃薄膜1的厚度对改善阻气性没有必要，因为即使厚度为1μm的玻璃薄膜1，也具有非常高的气体阻隔能力；虽然增加玻璃薄膜1上的凸起部10的分布密度，与增加玻璃薄膜1的厚度一样均会增加玻璃薄膜1的重量，但是这样对显示基板薄膜的可弯曲性的影响比较有限；对于塑料薄膜2来说，增加塑料薄膜2的厚度则重量也会增加，不过却对提高玻璃薄膜1的耐机械冲击能力是有利的，同时阻水性能、阻氧性能会改善，由于玻璃薄膜1具有充分的阻气性和阻水性，塑料薄膜2的厚度只考虑耐机械冲击力的特性即可；另外，塑料薄膜2的厚度增加会导致显示基板的透过率降低，会抵消可弯曲显示基板薄膜降低显示装置厚度的努力。综上所述，为提高显示基板薄膜的阻水性能和阻气性能，只需使用较薄的玻璃薄膜1便可以达到要求，并且玻璃薄膜1随着厚度减小，可弯曲性也逐渐良好，但是若简单的把玻璃薄膜1和塑料薄膜2叠加难以避免显性或隐性缺陷的产生，这是由于除机械力冲击之外，热冲击、玻璃薄膜1和塑料薄膜2的膨胀率差异、玻璃薄膜1应力累积、弯曲时的玻璃薄膜1与塑料薄膜2的弹性差异等因素都难以避免裂纹缺陷的发生。通过在玻璃薄膜1表面设置凸起部10，增加了玻璃薄膜1的局部厚度，使得玻璃薄膜1在耐受外力冲击和热冲击时，具有与较厚玻璃薄膜1相近的强度；玻璃薄膜1上的凸起部10容纳在塑料薄膜2上的凹陷部20中，构成镶嵌结构，有利于缩小膨胀率差异造成的移位，释放玻璃薄膜1应力，防止应力过度累积，弥补弯曲时的玻璃薄膜1与塑料薄膜2的弹性差异，避免剥离力产生。The bending property of the flexible display substrate film provided by the present invention, the material of the glass film 1, the material of the plastic film 2, the thickness of the glass film 1, the thickness of the plastic film 2, the shape of the convex portion 10, and the convexity The distribution density of the starting portion 10 is directly related. Specifically, for the glass film 1, the thicker the glass film 1 is, the more difficult it is to bend, the heavier the weight, and the less likely to be dominant after being impacted by an external force. Defects and recessive defects; therefore, increasing the thickness of the glass film 1 is not necessary for improving the gas barrier property because even the glass film 1 having a thickness of 1 μm has a very high gas barrier ability; although the convex portion on the glass film 1 is increased The distribution density of 10, as with increasing the thickness of the glass film 1, increases the weight of the glass film 1, but this has a limited effect on the bendability of the display substrate film; for the plastic film 2, the thickness of the plastic film 2 is increased. The weight will also increase, but it is advantageous for improving the mechanical impact resistance of the glass film 1, and the water blocking performance and the oxygen barrier property are improved. Since the glass film 1 has sufficient gas barrier properties and water resistance, the plastic film 2 The thickness is only considered to be resistant to mechanical impact; in addition, the increase in the thickness of the plastic film 2 causes the transmittance of the display substrate to decrease, which offsets the bendable Display means efforts to reduce the film thickness of the substrate of the display. In summary, in order to improve the water blocking performance and gas barrier performance of the display substrate film, only a thin glass film 1 can be used, and the glass film 1 has a good bendability as the thickness is reduced. However, if the glass film 1 and the plastic film 2 are simply superimposed, it is difficult to avoid the occurrence of dominant or recessive defects, which is due to thermal shock, difference in expansion ratio of the glass film 1 and the plastic film 2, and glass in addition to mechanical impact. It is difficult to avoid the occurrence of crack defects by factors such as stress accumulation of the film 1 and the difference in elasticity between the glass film 1 and the plastic film 2 at the time of bending. By providing the convex portion 10 on the surface of the glass film 1, the partial thickness of the glass film 1 is increased, so that the glass film 1 has a strength close to that of the thicker glass film 1 when subjected to external impact and thermal shock; on the glass film 1 The convex portion 10 is received in the recessed portion 20 on the plastic film 2 to form a mosaic structure, which is advantageous for reducing the displacement caused by the difference in the expansion ratio, releasing the stress of the glass film 1 and preventing excessive stress accumulation, and compensating for the glass film 1 during bending. The difference in elasticity from the plastic film 2 prevents the generation of peeling force.
本发明所述凸起部10在玻璃薄膜1上表面横向排列、纵向排列、或者呈阵列式排列；所述凸起部10为四棱锥形、四棱台形、球冠形、半圆柱形、三棱柱形、四棱柱形、长方体形或正方体形。下面结合凸起部10的不同具体结构对显示基板薄膜的弯曲性能影响进行说明：The convex portion 10 of the present invention is arranged horizontally, vertically, or in an array on the upper surface of the glass film 1; the convex portion 10 is a quadrangular pyramid, a quadrangular prism, a spherical crown, a semi-cylindrical, and a third Prismatic, quadrangular, cuboid or cube. The following describes the influence of the bending performance of the display substrate film in combination with the different specific structures of the protrusions 10:
图2是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图，图3是表示本发明的一实施方式所涉及的玻璃薄膜1的结构示意图；如图2、图3所示，作为一种优选实施方式，设定玻璃薄膜1上的凸起部10为三棱柱形，优选纵截面为等腰三角形的三棱柱形，且多个凸起部10在玻璃薄膜1上表面横向排列，假设玻璃薄膜1除凸起部10外的部分的厚度为tg，塑料薄膜2除凹陷部20外的部分的厚度为tp，凸起部10的凸起高度和凹陷部20的凹陷深度为h，则显 示基板薄膜的总厚度t＝tg+tp+h，相邻凸起部10之间的中心间距是W，凸起部10的最大宽度为Wg，塑料薄膜2上相邻凹陷部20之间的支撑凸起23的最大宽度为Wp，凸起部10的曲率半径为Rg，相邻凹陷部20之间的支撑凸起23的曲率半径为Rp，通常情况下可弯曲显示基板薄膜的曲率半径大于塑料薄膜2的曲率半径即R≥Rp；本发明显示基板薄膜具有纵向可弯曲性，当
Figure PCTCN2016108986-appb-000001
时，假设塑料薄膜2可以自由压缩，当显示基板薄膜向塑料薄膜2一侧弯曲时(假设玻璃薄膜1在下，塑料薄膜2在上，那么指的是显示基板薄膜向上弯曲)，凸起部10的曲率半径为
Figure PCTCN2016108986-appb-000002
同理可以进一步分析显示基板向玻璃薄膜1一侧弯曲时(假设玻璃薄膜1在下，塑料薄膜2在上，那么指的是显示基板薄膜向下弯曲)凸起部10的曲率半径；在
Figure PCTCN2016108986-appb-000003
时，在忽略玻璃薄膜1存在的条件下，塑料薄膜2上置于相邻凹陷部20之间的支撑凸起23的曲率半径为
Figure PCTCN2016108986-appb-000004
如果Wp＝Wg，则塑料薄膜2上置于相邻凹陷部20之间的支撑凸起23与凸起部10具有相同的曲率半径，这主要是忽略材料形变单纯从凸起部10的几何形状考虑得到的结论。实际上由于塑料有很大的弹性形变范围，所以Rp在实际应用过程中也远远小于玻璃薄膜1的曲率半径，故塑料薄膜2不会影响玻璃薄膜1的弯曲，如果凸起部10的凸起高度值属于[1μm，100μm]，凸起部10的最大宽度(等腰三角形的边长)Wg属于[1μm，100μm]，则凸起部10的曲率半径Rg、支撑凸起23的曲率半径Rp均小于120μm，该数值远小于厚度为100μm的玻璃薄膜1曲率半径(毫米量级)，故凸起部10的设置不会影响玻璃薄膜1自身的弯曲特性，相邻凹陷部20之间的支撑凸起23也不会影响塑料薄膜2自身的弯曲特性；当显示基板薄膜向塑料薄膜2一侧弯曲时，因塑料薄膜2的存在，在弯曲后忽略塑料薄膜2的塑性形变条件下，塑料薄膜2上相邻凹陷部20之间的支撑凸起23起到支撑玻璃薄膜1的作用，确保玻璃薄膜1不产生过度弯曲；同样地，分析显示基板薄膜向玻璃薄膜1一侧弯曲的情况，玻璃薄膜1上设置有凸起部10，且玻璃薄膜1的塑性形变可以忽略不计，因此当显示基板薄膜向玻璃薄膜1一侧弯曲时，玻璃薄膜1上的凸起部10对塑料薄膜2有支撑作用，可弯曲显示基板薄膜同样不能产生过度弯曲，确保玻璃薄膜1不产生缺陷。
Figure PCTCN2016108986-appb-000005
且Wp>Wg时，塑料薄膜2的支撑凸起23的最大宽 度大于玻璃薄膜1的凸起部10的最大宽度，由于塑料薄膜2本身的特性，支撑凸起23部10分不会影响塑料薄膜2的弯曲性能，同时当凸起部10尺寸较大时，则在显示基板薄膜发生弯曲时容易出现塑料薄膜2上的支撑凸起23与玻璃薄膜1的凸起部10剥离的现象，塑料薄膜2的膨胀系数得不到有效抑制，玻璃材料和塑料材料之间的结合不牢固，不利于玻璃薄膜1的应力释放；当Wp<Wg时，则相当于塑料薄膜2和玻璃薄膜1简单层叠的情况，这种情况会带来不良的后果，前文已经阐述过，在此不再重述，因此
Figure PCTCN2016108986-appb-000006
且Wp<Wg的参数情况要避免，玻璃薄膜1上的凸起部10过大会影响弯曲效果，增加显示基板薄膜的重量；当多个凸起部10在玻璃薄膜1上表面纵向排列时，除显示基板薄膜的弯曲方向之外与横向排列的多个凸起部10的说明过程相同。2 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention, and FIG. 3 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention; as shown in FIG. 2 and FIG. In a preferred embodiment, the convex portion 10 on the glass film 1 is set to have a triangular prism shape, preferably a triangular prism shape whose longitudinal section is an isosceles triangle, and the plurality of convex portions 10 are horizontally arranged on the upper surface of the glass film 1. Assuming that the thickness of the portion of the glass film 1 excluding the convex portion 10 is t g , the thickness of the portion of the plastic film 2 excluding the depressed portion 20 is t p , the convex height of the convex portion 10 and the concave depth of the depressed portion 20 are h, the total thickness of the substrate film is t=t g +t p +h, the center-to-center spacing between adjacent convex portions 10 is W, and the maximum width of the convex portion 10 is W g , which is adjacent to the plastic film 2 support recesses 20 between the protrusions 23 of the maximum width W p, the radius of curvature of the convex portion 10 is R g, 20 adjacent the recessed portion between the supporting projections 23 of a radius of curvature R p, usually flexible display substrate film is greater than the radius of curvature of the plastic film 2, i.e., the radius of curvature R≥R p A substrate having a thin film of the present invention shows a longitudinal bendability, when
Figure PCTCN2016108986-appb-000001
When it is assumed that the plastic film 2 can be freely compressed, when the display substrate film is bent toward the plastic film 2 side (assuming that the glass film 1 is on the lower side, the plastic film 2 is on the upper side, it means that the display substrate film is bent upward), the convex portion 10 The radius of curvature is
Figure PCTCN2016108986-appb-000002
Similarly, the curvature radius of the convex portion 10 when the display substrate is bent toward the glass film 1 side (assuming that the glass film 1 is under, the plastic film 2 is on, then the display substrate film is bent downward) can be further analyzed;
Figure PCTCN2016108986-appb-000003
At the time of ignoring the presence of the glass film 1, the radius of curvature of the support protrusion 23 placed between the adjacent depressed portions 20 of the plastic film 2 is
Figure PCTCN2016108986-appb-000004
If W p = W g , the support protrusion 23 placed on the plastic film 2 between the adjacent depressed portions 20 has the same radius of curvature as the convex portion 10, which is mainly to ignore the deformation of the material from the convex portion 10 alone. The geometry takes into account the conclusions reached. In fact, since the plastic has a large elastic deformation range, R p is far less than the radius of curvature of the glass film 1 in the actual application process, so the plastic film 2 does not affect the bending of the glass film 1, if the convex portion 10 The protrusion height value belongs to [1 μm, 100 μm], and the maximum width of the boss portion 10 (the side length of the isosceles triangle) W g belongs to [1 μm, 100 μm], and the radius of curvature R g of the boss portion 10, the support protrusion 23 The radius of curvature R p is less than 120 μm, which is much smaller than the radius of curvature (on the order of millimeters) of the glass film 1 having a thickness of 100 μm, so that the arrangement of the convex portion 10 does not affect the bending property of the glass film 1 itself, and the adjacent depressed portion The support protrusion 23 between the 20 does not affect the bending property of the plastic film 2 itself; when the display substrate film is bent toward the side of the plastic film 2, the plastic deformation of the plastic film 2 is ignored after the bending due to the presence of the plastic film 2. Under the condition, the supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 functions to support the glass film 1, ensuring that the glass film 1 does not excessively bend; likewise, the analysis shows that the substrate film is directed to the glass film 1 side. Curved love The glass film 1 is provided with the convex portion 10, and the plastic deformation of the glass film 1 is negligible, so when the display substrate film is bent toward the glass film 1 side, the convex portion 10 on the glass film 1 is applied to the plastic film 2 With the support function, the bendable display substrate film can also not produce excessive bending, ensuring that the glass film 1 does not cause defects.
Figure PCTCN2016108986-appb-000005
And when W p >W g , the maximum width of the support protrusion 23 of the plastic film 2 is larger than the maximum width of the convex portion 10 of the glass film 1. Due to the characteristics of the plastic film 2 itself, the support protrusion 23 portion 10 does not affect The bending property of the plastic film 2, and when the size of the boss portion 10 is large, the peeling of the support protrusion 23 on the plastic film 2 and the convex portion 10 of the glass film 1 tends to occur when the display substrate film is bent. expansion coefficient of the plastic film 2 is not effective in inhibiting binding between the glass material and a plastic material is not firmly against the glass film stress release. 1; and when W p <W g, equivalent plastic film 2 and the glass film 1 simple cascading situation, this situation will have adverse consequences, as already explained in the previous, will not be repeated here, so
Figure PCTCN2016108986-appb-000006
And the parameter of W p <W g should be avoided, the convex portion 10 on the glass film 1 excessively affects the bending effect, and the weight of the display substrate film is increased; when the plurality of convex portions 10 are longitudinally arranged on the upper surface of the glass film 1 The description process of the plurality of convex portions 10 arranged in the lateral direction is the same except that the bending direction of the substrate film is displayed.
图4是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图，图5是表示本发明的一实施方式所涉及的玻璃薄膜1的结构示意图，如图4、图5所示，作为一种优选实施方式，当凸起部10为四棱柱形，优选纵截面为等腰梯形的四棱柱形，且多个凸起部10在玻璃薄膜1上表面横向排列，假设等腰梯形的上底宽度为Wg0，塑料薄膜2上相邻凹陷部20之间的支撑凸起23的最小宽度为Wp0，可弯曲显示基板薄膜具有纵向(竖直方向)可弯曲性，当
Figure PCTCN2016108986-appb-000007
时，在显示基板薄膜向塑料薄膜2一侧弯曲时，相邻凸起部10之间的中心间距是W，凸起部10的最大宽度(等腰梯形的下底宽度)为Wg，塑料薄膜2上相邻凹陷部20之间的支撑凸起23的最大宽度为Wp，凸起部10的曲率半径为Rg，相邻凹陷部20之间的支撑凸起23的曲率半径为Rp，在忽略塑料薄膜2存在的条件下，玻璃薄膜1上凸起部10的曲率半径
Figure PCTCN2016108986-appb-000008
同样地，可以分析显示基板薄膜向玻璃薄膜1一侧弯曲的情况，当
Figure PCTCN2016108986-appb-000009
时，在忽略玻璃薄膜1存在的条件下，塑料薄膜2上的支撑凸起23的曲率半径
Figure PCTCN2016108986-appb-000010
如果Wp＝Wg，则塑料薄膜2上的支撑凸起23和玻璃薄膜1上的凸起部10具有相同的曲率半径，上述说明同样基于忽略形变的假设条件，单纯从几何形状考虑得到的结论。实际上塑料材料有很大的弹性形变范围，所以Rp在实际应用过 程中也远远小于玻璃薄膜1的曲率半径，如果凸起部10的凸起高度值属于[1μm，100μm]，凸起部10的最大宽度(等腰梯形的下底宽度)Wg属于[1μm，100μm]，Wp0等于50μm，则Rg和Rp分别小于290微米，该数值远小于厚度为100μm的玻璃薄膜1曲率半径(毫米量级)，凸起部10的设置不会影响玻璃薄膜1自身的弯曲特性，相邻凹陷部20之间的支撑凸起23也不会影响塑料薄膜2自身的弯曲特性；当显示基板薄膜向塑料薄膜2一侧弯曲时，因塑料薄膜2的存在，在弯曲后忽略塑料薄膜2的塑性形变条件下，塑料薄膜2上相邻凹陷部20之间的支撑凸起23起到支撑玻璃薄膜1的作用，确保玻璃薄膜1不产生过度弯曲；同样地，分析显示基板薄膜向玻璃薄膜1一侧弯曲的情况，玻璃薄膜1上设置有凸起部10，且玻璃薄膜1的塑性形变可以忽略不计，因此当显示基板薄膜向玻璃薄膜1一侧弯曲时，玻璃薄膜1上的凸起部10对塑料薄膜2有支撑作用，可弯曲显示基板薄膜同样不能产生过度弯曲，确保玻璃薄膜1不产生缺陷；从显示基板薄膜的曲率半径的形式来看，凸起部10为四棱柱形的显示基板薄膜曲率半径要大于凸起部10为三棱柱形的显示基板薄膜曲率半径，故当玻璃薄膜1的弯曲能力较低时，凸起部10采用四棱柱结构更有利于避免显示基板薄膜的过度弯曲；当
Figure PCTCN2016108986-appb-000011
且Wp>Wg时，有利于减少显示基板薄膜的重量，优选Wp<2Wg，利用防止缺陷发生；塑料薄膜2的支撑凸起23的最大宽度大于玻璃薄膜1的凸起部10的最大宽度，由于塑料薄膜2本身的特性，支撑凸起23部10分不会影响塑料薄膜2的弯曲性能，同时当凸起部10尺寸较大时，则在显示基板薄膜发生弯曲时容易出现塑料薄膜2上的支撑凸起23与玻璃薄膜1的凸起部10剥离的现象，塑料薄膜2的膨胀系数得不到有效抑制，玻璃材料和塑料材料之间的结合不牢固，不利于玻璃薄膜1的应力释放；当Wp<Wg时，则相当于塑料薄膜2和玻璃薄膜1简单层叠的情况，这种情况会带来不良的后果，前文已经阐述过，在此不再重述，因此
Figure PCTCN2016108986-appb-000012
且Wp<Wg的参数情况要避免，玻璃薄膜1上的凸起部10过大会影响弯曲效果，增加显示基板薄膜的重量；当多个凸起部10在玻璃薄膜1上表面纵向排列时，除显示基板薄膜的弯曲方向之外与横向排列的多个凸起部10的说明过程相同。4 is a schematic view showing the structure of a display substrate film according to an embodiment of the present invention, and FIG. 5 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention, as shown in FIG. 4 and FIG. In a preferred embodiment, when the convex portion 10 has a quadrangular prism shape, a quadrangular prism shape having an isosceles trapezoidal longitudinal section is preferred, and a plurality of convex portions 10 are laterally arranged on the upper surface of the glass film 1, assuming an isosceles trapezoidal shape. The bottom width is W g0 , and the minimum width of the support protrusion 23 between the adjacent recessed portions 20 on the plastic film 2 is W p0 , and the bendable display substrate film has a longitudinal (vertical direction) bendability.
Figure PCTCN2016108986-appb-000007
When the display substrate film is bent toward the plastic film 2 side, the center-to-center spacing between the adjacent convex portions 10 is W, and the maximum width of the convex portion 10 (the lower base width of the isosceles trapezoid) is W g , plastic radius of curvature of the maximum width of the support recesses 20 between adjacent projections 23 on the film 2 is W p, the radius of curvature of the convex portion 10 is R g, 20 between the support projection 23 adjacent the recessed portion of R p , the radius of curvature of the convex portion 10 on the glass film 1 under the condition that the plastic film 2 is omitted
Figure PCTCN2016108986-appb-000008
Similarly, it can be analyzed that the substrate film is bent toward the side of the glass film 1 when
Figure PCTCN2016108986-appb-000009
The radius of curvature of the support protrusion 23 on the plastic film 2 under the condition that the existence of the glass film 1 is neglected
Figure PCTCN2016108986-appb-000010
If W p = W g , the support protrusion 23 on the plastic film 2 and the convex portion 10 on the glass film 1 have the same radius of curvature, and the above description is also based on the assumption of neglecting the deformation, which is purely considered from the geometrical consideration. in conclusion. In fact, the plastic material has a large elastic deformation range, so R p is also much smaller than the radius of curvature of the glass film 1 in practical application, and if the convex height value of the convex portion 10 is [1 μm, 100 μm], the convexity The maximum width of the portion 10 (the lower base width of the isosceles trapezoid) W g belongs to [1 μm, 100 μm], and W p0 is equal to 50 μm, then R g and R p are respectively less than 290 μm, which is much smaller than the glass film 1 having a thickness of 100 μm. The radius of curvature (on the order of millimeters), the arrangement of the bosses 10 does not affect the bending property of the glass film 1 itself, and the support protrusions 23 between the adjacent recesses 20 do not affect the bending property of the plastic film 2 itself; When the display substrate film is bent toward the side of the plastic film 2, the support protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 is played under the plastic deformation condition of the plastic film 2 after the bending due to the presence of the plastic film 2. The glass film 1 is supported to ensure that the glass film 1 does not excessively bend. Similarly, the analysis shows that the substrate film is bent toward the glass film 1 side. The glass film 1 is provided with the convex portion 10, and the plasticity of the glass film 1 is provided. Deformation can be ignored Slightly, when the display substrate film is bent toward the glass film 1 side, the convex portion 10 on the glass film 1 has a supporting effect on the plastic film 2, and the bendable display substrate film can not be excessively bent, ensuring that the glass film 1 is not The defect is generated. The radius of curvature of the display substrate film having the convex portion 10 being a quadrangular prism is larger than the radius of curvature of the display substrate film having the triangular prism shape of the convex portion 10, so that the glass film is formed. When the bending ability of 1 is low, the use of the quadrangular prism structure of the convex portion 10 is more advantageous for avoiding excessive bending of the display substrate film;
Figure PCTCN2016108986-appb-000011
And W p> W g, it is advantageous to reduce the weight of the display substrate film, preferably W p <2W g, using prevent defects; plastic film support boss projecting portion 23 is greater than the maximum width of the glass film 10 1 2 The maximum width, due to the characteristics of the plastic film 2 itself, the support protrusion 23 portion 10 does not affect the bending property of the plastic film 2, and when the size of the boss portion 10 is large, plastic is likely to appear when the display substrate film is bent. The phenomenon that the supporting protrusion 23 on the film 2 is separated from the convex portion 10 of the glass film 1 is not effectively suppressed, and the bonding between the glass material and the plastic material is not strong, which is disadvantageous to the glass film 1 The stress release; when W p < W g , it is equivalent to the simple lamination of the plastic film 2 and the glass film 1 , which may have adverse consequences, which have been described above and will not be repeated here.
Figure PCTCN2016108986-appb-000012
And the parameter of W p <W g should be avoided, the convex portion 10 on the glass film 1 excessively affects the bending effect, and the weight of the display substrate film is increased; when the plurality of convex portions 10 are longitudinally arranged on the upper surface of the glass film 1 The description process of the plurality of convex portions 10 arranged in the lateral direction is the same except that the bending direction of the substrate film is displayed.
图6是表示本发明的一实施方式所涉及的玻璃薄膜1的结构示意图，如图6所示，作为一种优选实施方式，当凸起部10为四棱锥形，且优选多个凸起部10在玻璃薄膜1上表面呈阵列式排列，显示基板薄膜既可以横向弯曲又可以纵向 弯曲，但在其它方向的弯曲效果要稍差，凸起部10的分布密度是空间均匀阵列分布，即各凸起部10的同一方向上的底边分别平行，各凸起部10的底面中心距相等，各凸起部10的顶点距离相等，进而保证显示基板薄膜弯曲的均匀性。凸起部10为四棱锥形的显示基板薄膜在横向和纵向上的弯曲特性分别与凸起部10为三棱柱形的显示基板薄膜的弯曲特性类此，在其它弯曲方向上影响因素比较复杂，弯曲效果不佳，不建议该种实施方式的显示基板薄膜在其它方向弯曲。6 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention. As shown in FIG. 6, as a preferred embodiment, when the boss portion 10 has a quadrangular pyramid shape, and preferably a plurality of boss portions 10 is arranged in an array on the upper surface of the glass film 1, showing that the substrate film can be bent laterally or vertically Bending, but the bending effect in other directions is slightly worse, and the distribution density of the convex portions 10 is a spatially uniform array distribution, that is, the bottom edges of the respective convex portions 10 in the same direction are parallel, and the center of the bottom surface of each convex portion 10 is When the distances are equal, the apex distances of the convex portions 10 are equal, thereby ensuring the uniformity of bending of the display substrate film. The convex portion 10 has a bending characteristic of the quadrangular pyramidal display substrate film in the lateral direction and the longitudinal direction, and the bending property of the display substrate film having the triangular portion of the convex portion 10, respectively, and the influence factors in other bending directions are complicated. The bending effect is not good, and it is not recommended that the display substrate film of this embodiment be bent in other directions.
图7是表示本发明的一实施方式所涉及的玻璃薄膜1的结构示意图，如图7所示，作为一种优选实施方式，当凸起部10为四棱台形，且优选多个凸起部10在玻璃薄膜1上表面呈阵列式排列，可弯曲性略差，但是对于避免玻璃薄膜1产生过度弯曲也更为有利，凸起部10的分布密度是空间均匀阵列分布，即各凸起部10的上下底面的边分别平行，各凸起部10的相邻上下底面中心距相等且均匀分布，保证显示基板薄膜弯曲的均匀性。凸起部10为四棱台形的显示基板薄膜在横向和纵向上的弯曲特性分别与凸起部10为四棱柱形的显示基板薄膜的弯曲特性类此，在其它弯曲方向上影响因素比较复杂，弯曲效果不佳，不建议该种实施方式的显示基板薄膜在其它方向弯曲。Fig. 7 is a schematic view showing the structure of a glass film 1 according to an embodiment of the present invention. As shown in Fig. 7, as a preferred embodiment, the boss portion 10 has a quadrangular prism shape, and preferably a plurality of boss portions. 10 is arranged in an array on the upper surface of the glass film 1, and the bendability is slightly poor, but it is more advantageous to avoid excessive bending of the glass film 1. The distribution density of the protrusions 10 is a spatially uniform array distribution, that is, the respective convex portions. The sides of the upper and lower bottom surfaces of 10 are parallel, and the center distances of the adjacent upper and lower bottom surfaces of each convex portion 10 are equal and evenly distributed, thereby ensuring the uniformity of bending of the display substrate film. The convex portion 10 has a bending characteristic of the quadrangular prism-shaped display substrate film in the lateral direction and the longitudinal direction, and the bending property of the display substrate film having the quadrangular prism shape of the convex portion 10, respectively, and the influence factors in other bending directions are complicated. The bending effect is not good, and it is not recommended that the display substrate film of this embodiment be bent in other directions.
作为一种优选实施方式，当玻璃薄膜1上的凸起部10为半圆柱形，弯曲效果与凸起部10为三棱柱形、四棱柱形的情况类似，可以在显示基板薄膜实际加工过程中，调整凸起部10的半径和分布密度，获得满意的弯曲性能。该优选实施方式中的凸起部10在玻璃薄膜1上表面横向排列或纵向排列的弯曲性能分析过程相同，只是显示基板薄膜的弯曲方向不同。As a preferred embodiment, when the convex portion 10 on the glass film 1 is semi-cylindrical, the bending effect is similar to the case where the convex portion 10 has a triangular prism shape and a quadrangular prism shape, and can be used in the actual processing of the display substrate film. The radius and distribution density of the boss 10 are adjusted to obtain satisfactory bending performance. The convex portion 10 in the preferred embodiment has the same bending property analysis process in which the upper surface of the glass film 1 is laterally aligned or longitudinally aligned, except that the bending direction of the substrate film is different.
图8是表示本发明的一实施方式所涉及的显示基板薄膜的结构示意图，图9是表示本发明的一实施方式所涉及的玻璃薄膜1的结构示意图，如图8、图9所示，作为一种优选实施方式，当玻璃薄膜1上的凸起部10为球冠形，则凸起部10在任意方向上都有相等的弯曲能力，定量地分析凸起部10的曲率半径较为困难。显示基板薄膜纵向或横向的弯曲特性与凸起部10为半圆柱形的显示基板薄膜的弯曲特性类似，可以在显示基板薄膜实际加工过程中，调整凸起部10的半径和分布密度，获得满意的弯曲性能。FIG. 8 is a schematic view showing a configuration of a display substrate film according to an embodiment of the present invention, and FIG. 9 is a view showing a configuration of a glass film 1 according to an embodiment of the present invention, as shown in FIGS. 8 and 9 In a preferred embodiment, when the convex portion 10 on the glass film 1 has a spherical crown shape, the convex portion 10 has an equal bending ability in any direction, and it is difficult to quantitatively analyze the radius of curvature of the convex portion 10. The bending property of the display substrate film in the longitudinal or lateral direction is similar to that of the display substrate film in which the convex portion 10 is semi-cylindrical, and the radius and distribution density of the convex portion 10 can be adjusted during the actual processing of the display substrate film to obtain satisfactory Bending performance.
当呈阵列式排列时，分布在玻璃薄膜1上表面边缘区域的凸起部10的数量多于分布在玻璃薄膜1上表面非边缘区域的凸起部10的数量；玻璃薄膜1最薄弱的区域、最容易发生缺陷的区域是自玻璃薄膜1边缘区域向内延伸数毫米的面积范围，在这一区域设置凸起部10的目的是为了防止边缘缺陷，能够有效降 低各种缺陷的产生。凸起部10的形状根据实际情况可以设计成截面为三角形、梯形、弧形、半圆形或半椭圆形；当玻璃薄膜1的厚度和凸起部10的高度之和大于0.1mm时，为不影响弯曲性，布设于玻璃薄膜1边缘区域的多个凸起部10，与布设于玻璃薄膜1非边缘区域(内部区域)的多个凸起部10在弯曲方向和排列密度要保持一致；当多个凸起部10纵向排列或横向排列时，保证玻璃薄膜1的边缘区域具有凸起部10，优先保证弯曲特性，耐受冲击力次之。当多个凸起部10呈阵列式排列时，保证分布于边缘区域的凸起部10数量多于分布在非边缘区域的凸起部10数量，优先保证可弯曲特性，耐受冲击力次之。当玻璃薄膜1厚度和凸起部10的凸起高度之和大于0.1mm时，可弯曲性高，可以考虑将玻璃薄膜1的边缘设计成完全封闭型或大部分封闭型，不需要考虑内部的凸起部10结构形式，这样的显示基板薄膜具有更强的耐受边缘冲击的能力，只是弯曲特性较弱。When arranged in an array, the number of the convex portions 10 distributed in the edge portion of the upper surface of the glass film 1 is larger than the number of the convex portions 10 distributed in the non-edge regions of the upper surface of the glass film 1; the weakest region of the glass film 1 The area where the defect is most likely to occur is an area in which the edge portion of the glass film 1 extends inward by several millimeters, and the purpose of providing the boss 10 in this area is to prevent edge defects and to effectively reduce Low generation of various defects. The shape of the convex portion 10 may be designed to have a triangular shape, a trapezoidal shape, an arc shape, a semicircular shape or a semi-elliptical shape according to actual conditions; when the sum of the thickness of the glass film 1 and the height of the convex portion 10 is greater than 0.1 mm, The plurality of convex portions 10 disposed on the edge region of the glass film 1 are aligned with the plurality of convex portions 10 disposed in the non-edge regions (internal regions) of the glass film 1 in the bending direction and the arrangement density, without affecting the bendability; When the plurality of convex portions 10 are longitudinally arranged or laterally arranged, it is ensured that the edge portion of the glass film 1 has the convex portion 10, and the bending property is preferentially ensured, and the impact resistance is inferior. When the plurality of convex portions 10 are arranged in an array, it is ensured that the number of the convex portions 10 distributed in the edge regions is larger than the number of the convex portions 10 distributed in the non-edge regions, and the bending property is preferentially ensured, and the impact resistance is inferior. . When the sum of the thickness of the glass film 1 and the protrusion height of the boss 10 is more than 0.1 mm, the bendability is high, and it is conceivable to design the edge of the glass film 1 to be completely closed or mostly closed, without considering the internal The convex portion 10 is structured such that the display substrate film has a stronger ability to withstand edge impact, but the bending property is weak.
作为一种优选实施方式，所述凸起部10的凸起高度、以及凹陷部20的凹陷深度均小于等于100μm；玻璃薄膜1上的凸起部10的凸起高度越高，越有利于保持玻璃薄膜1自身的机械稳定性，缺点是弯曲性变差，重量变重，塑料薄膜2上相邻凹陷部20之间的支撑凸起23的作用是支撑玻璃薄膜1，支撑凸起23越厚，支撑作用越强。As a preferred embodiment, the protrusion height of the convex portion 10 and the depression depth of the concave portion 20 are both 100 μm or less; the higher the protrusion height of the convex portion 10 on the glass film 1 is, the more favorable it is to maintain The mechanical stability of the glass film 1 itself is disadvantageous in that the bending property is deteriorated and the weight is heavy. The supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 serves to support the glass film 1, and the thicker the support protrusion 23 is. The stronger the support.
作为一种优选实施方式，所述玻璃薄膜1不包括凸起部10的部分的厚度小于等于100μm。经实验验证，各种有碱玻璃或无碱玻璃，当厚度小于100μm时，都具有良好的可弯曲特性。As a preferred embodiment, the thickness of the portion of the glass film 1 excluding the convex portion 10 is 100 μm or less. It has been experimentally verified that various alkali glass or alkali-free glass have good bendability when the thickness is less than 100 μm.
作为一种优选实施方式，所述塑料薄膜2包括与所述玻璃薄膜1相对设置的覆盖部分21和两个分别置于覆盖部分21两侧的边缘部分22，所述覆盖部分21不包括凹陷部20的部分的厚度小于等于400μm，在满足对玻璃薄膜1的包裹时，塑料薄膜2的厚度越薄越好，可以增加透过率，更利于弯曲；作为一种优选实施方式，所述边缘部分22的宽度大于100μm，厚度小于等于600μm，边缘部分22的厚度等于塑料薄膜2覆盖部分21的厚度与玻璃薄膜1不包括凸起部10的部分的厚度之和，通过包裹玻璃薄膜1外缘的边缘区的设置能够有效降低缺陷发生的概率。As a preferred embodiment, the plastic film 2 includes a cover portion 21 disposed opposite to the glass film 1 and two edge portions 22 respectively disposed on both sides of the cover portion 21, the cover portion 21 not including a recess portion The thickness of the portion of 20 is less than or equal to 400 μm. When the wrapping of the glass film 1 is satisfied, the thinner the thickness of the plastic film 2, the better, the transmittance can be increased, and the bending is more favorable; as a preferred embodiment, the edge portion The width of 22 is greater than 100 μm, the thickness is less than or equal to 600 μm, and the thickness of the edge portion 22 is equal to the sum of the thickness of the cover portion 21 of the plastic film 2 and the thickness of the portion of the glass film 1 not including the projection 10, by wrapping the outer edge of the glass film 1. The setting of the edge area can effectively reduce the probability of occurrence of defects.
作为一种优选实施方式，所述显示基板薄膜的各处厚度是均匀的，即玻璃薄膜1不包括凸起部10的部分的厚度、凸起部10的凸起高度、覆盖部分21不包括凹陷部20的部分的厚度之和等于显示基板薄膜的厚度，塑料薄膜2边缘部 分22的厚度也与显示基板薄膜的厚度相等，且小于等于600μm；显示基板薄膜的厚度越薄，弯曲性越好。一般来说，通过减小玻璃薄膜1的厚度，降低整个显示基板薄膜的厚度，提高可弯曲性的同时能降低整个显示基板薄膜的重量，提高抗跌落能力。当玻璃薄膜1的厚度只有数微米时，显示基板薄膜的弯曲特性接近塑料薄膜2的弯曲特性，而阻气特性仍然可以媲美一般的玻璃基板。塑料薄膜2的厚度影响显示基板薄膜的透过率，当显示基板薄膜作为非背板用途时，尽可能减小塑料薄膜2厚度，提高整个基板透过率。As a preferred embodiment, the thickness of the display substrate film is uniform, that is, the thickness of the portion of the glass film 1 not including the convex portion 10, the convex height of the convex portion 10, and the covering portion 21 not including the concave portion The sum of the thicknesses of the portions of the portion 20 is equal to the thickness of the display substrate film, and the edge portion of the plastic film 2 The thickness of the minute 22 is also equal to the thickness of the display substrate film and is 600 μm or less; the thinner the thickness of the display substrate film, the better the bendability. In general, by reducing the thickness of the glass film 1, the thickness of the entire display substrate film is lowered, the bendability is improved, the weight of the entire display substrate film is reduced, and the drop resistance is improved. When the thickness of the glass film 1 is only a few micrometers, the bending property of the display substrate film is close to that of the plastic film 2, and the gas barrier property can still be comparable to that of a general glass substrate. The thickness of the plastic film 2 affects the transmittance of the display substrate film. When the display substrate film is used as a non-backplane, the thickness of the plastic film 2 is reduced as much as possible, and the transmittance of the entire substrate is improved.
作为一种优选实施方式，所述玻璃薄膜1的表面波纹度小于等于0.5μm/20mm；所述塑料薄膜2的表面粗糙度小于等于2nm；当以玻璃薄膜1下表面作为显示基准面时，通过研磨的方式可以有效降低波纹度，以满足显示对基板薄膜的要求；塑料薄膜2因易弯曲，波纹度在工艺加工过程中容易修正，相对波纹度来说，表面粗糙度是更需要关注的指标。As a preferred embodiment, the surface waviness of the glass film 1 is less than or equal to 0.5 μm / 20 mm; the surface roughness of the plastic film 2 is less than or equal to 2 nm; when the lower surface of the glass film 1 is used as a display reference surface, The grinding method can effectively reduce the waviness to meet the requirements of the display substrate film; the plastic film 2 is easy to be bent due to the bending, the waviness is easy to be corrected during the processing, and the surface roughness is an indicator that needs more attention than the waviness. .
作为一种优选实施方式，所述显示基板薄膜还包括配置于玻璃薄膜1下表面和/或塑料薄膜2上表面的电极；该电极种类分为透明电极和非透明电极。透明电极可以选用ITO材料、PEDOT材料、碳纳米管材料或者石墨烯材料等制成均可；非透明电极可以选用金属电极，具体地，如铝、银、铜等金属电极；电极附着于玻璃薄膜1表面的好处在于可耐受高温加工过程，显示基板薄膜的热稳定性好；当温度变化时，塑料薄膜2的尺寸发生变化时，也不会影响电极的几何尺寸，具有较高的热稳定性，有利于提高显示装置的分辨率；电极附着于塑料薄膜2表面时，需要更低的工艺温度，但是电极具有非常好的可弯曲特性，特别是有机电极材料，如由PEDOT材料制成的电极附着于塑料薄膜2表面时，具有更好的粘附力，而且电极薄膜的均匀性好。As a preferred embodiment, the display substrate film further includes an electrode disposed on a lower surface of the glass film 1 and/or an upper surface of the plastic film 2; the electrode type is divided into a transparent electrode and a non-transparent electrode. The transparent electrode may be made of ITO material, PEDOT material, carbon nanotube material or graphene material; the non-transparent electrode may be a metal electrode, specifically, a metal electrode such as aluminum, silver or copper; and the electrode is attached to the glass film. 1 The surface has the advantage of being able to withstand high temperature processing, showing that the substrate film has good thermal stability; when the temperature changes, the size of the plastic film 2 changes, it does not affect the electrode geometry, and has high heat stability. It is beneficial to improve the resolution of the display device; when the electrode is attached to the surface of the plastic film 2, a lower process temperature is required, but the electrode has very good bendability, especially an organic electrode material, such as a PEDOT material. When the electrode is attached to the surface of the plastic film 2, it has better adhesion and the uniformity of the electrode film is good.
作为一种优选实施方式，所述显示基板薄膜还包括配置于玻璃薄膜1下表面和/或塑料薄膜2上表面的薄膜晶体管；该薄膜晶体管种类根据需要可以选用有机薄膜晶体管或无机薄膜晶体管，当薄膜晶体管选用无机薄膜晶体管，则设置在玻璃薄膜1一侧比较有利，玻璃薄膜1能够耐受更高的温度处理过程且不变形，具体地，如a-Si(无定形硅)薄膜晶体管、p-Si(多晶硅)薄膜晶体管、LTPS(低温多晶硅)薄膜晶体管、IGZO(铟镓锌氧化物)薄膜晶体管等设置在玻璃一侧能够适应现有的工艺制造环境，如果采用有机TFT即OTFT(有机薄膜晶体管)时，设置在玻璃薄膜1或塑料薄膜2一侧均可以满足工艺制造环境，不过设置在玻璃薄膜1一侧，制造有源器件尺寸稳定性好，均一性高，有利于 高分辨显示器的实现；当薄膜晶体管配置于塑料薄膜2上表面且使用无机薄膜晶体管时，为了满足高温制造工艺要求，塑料薄膜2则需要选择耐高温材料如PI薄膜或PEN薄膜，同时在制造工艺方面需要做出一定的调整，以满足材料热稳定性的要求。As a preferred embodiment, the display substrate film further includes a thin film transistor disposed on the lower surface of the glass film 1 and/or the upper surface of the plastic film 2; the thin film transistor type may be an organic thin film transistor or an inorganic thin film transistor as needed. If the thin film transistor is an inorganic thin film transistor, it is advantageous to be disposed on the side of the glass film 1. The glass film 1 can withstand higher temperature processing without deformation, specifically, such as a-Si (amorphous silicon) thin film transistor, p -Si (polysilicon) thin film transistor, LTPS (low temperature polysilicon) thin film transistor, IGZO (indium gallium zinc oxide) thin film transistor, etc., can be placed on the glass side to adapt to the existing process manufacturing environment, if an organic TFT is used, that is, an OTFT (organic film) When the transistor is provided, it can be disposed on the side of the glass film 1 or the plastic film 2 to satisfy the process manufacturing environment, but it is disposed on the side of the glass film 1, and the active device is manufactured with good dimensional stability and high uniformity, which is advantageous for the transistor. Implementation of high-resolution display; when the thin film transistor is disposed on the upper surface of the plastic film 2 and the inorganic thin film transistor is used, in order to meet the requirements of the high-temperature manufacturing process, the plastic film 2 needs to select a high-temperature resistant material such as a PI film or a PEN film, and at the same time in the manufacturing process. Some adjustments are needed to meet the thermal stability requirements of the materials.
本发明还提供了一种显示装置，该显示装置包括上述任一实施方式所述的可弯曲显示基板薄膜；优选地，所述显示装置可以为液晶显示装置、有机发光二极管显示装置或电子纸显示装置；当显示装置为液晶显示装置时，可以制作成TN(扭曲向列型)、STN(超扭曲向列型)、IPS、PDLC、Ch-LCD、VA和FLC等不同显示模式的液晶显示装置；其中，TN显示模式的液晶显示装置可分为无源和有源两类，无源显示时，既可以把塑料薄膜2一侧作为液晶盒的内表面，也可以把玻璃薄膜1一侧作为内表面，或者将塑料薄膜2一侧和玻璃薄膜1一侧分别作为内表面，对液晶盒内表面的组合由于制造工艺环境的温度低，液晶盒厚度均一性要求不高，有源显示时，优选为使用玻璃薄膜1作为液晶盒的内表面，液晶盒制作过程中的制造工艺环境均能满足，膨胀率低，可以精确控制有源器件的精度，形成均匀一致的有源器件；STN、PDLC、Ch-LCD、无源VA和无源FLC液晶盒的配置方式类似无源TN形式，而IPS、有源FLC和有源VA采用玻璃薄膜1作为内表面是有利的，但是这样的配置方式也不是绝对的，如果采用OTFT或者有机透明电极，可以考虑塑料薄膜2作为液晶盒的内表面，液晶显示装置的可弯曲显示基板薄膜使用两枚，要求两枚显示基板薄膜的弯曲方向一致，具体地，假设其中一显示基板薄膜的多个凸起部10在玻璃薄膜1上纵向排列，那么另一显示基板薄膜的多个凸起部10在玻璃薄膜1上纵向排列或呈阵列式排列，假设其中一显示基板薄膜的多个凸起部10在玻璃薄膜1上横向排列，那么另一显示基板薄膜的多个凸起部10在玻璃薄膜1上横向排列或呈阵列式排列。液晶显示装置种类繁多，材料组合选择性宽泛，实际应用过程中，根据薄膜的特性和制造工艺环境要求择优组合，在此不详细列举，无论采用哪种组合，可弯曲显示基板薄膜均可以达到可弯曲的目的，能够有效避免过度弯曲的缺陷产生，同时阻气性不逊于纯粹的玻璃基板薄膜液晶盒。优选地，所述显示装置可以为有机发光二极管显示装置，当显示装置为有机发光二极管显示装置时，可以制作成顶发光或底发光的显示装置；有机发光二极管(OLED)，按照驱动原理可以分为有源和无源显示两类，按照发光材料可以分为高分子材料和小分子材料两大类，其中无源驱动对基板薄膜要求低，基板薄膜材料容易 满足显示要求，有源驱动的OLED与有源驱动的液晶显示装置相比，由于OLED是电流型器件，因此在电荷迁移率和均一性方面有更严格的要求；另外，构成OLED的材料，如有机发光层、空穴注入层、空穴传输层、电子传输层和电子注入层等均为有机材料，对氧分子和水分子更为敏感，所以显示基板薄膜的阻气性要求非常高，参照液晶显示装置的上述相关说明，可弯曲显示基板薄膜是非常适合的形式，因为OLED使用单层的可弯曲的显示基板薄膜，电极、显示材料是采用层叠型的，所以弯曲形式似乎是容易实现的，但其实不然，苛刻的阻气性要求，除显示基板薄膜外，背电极侧的保护通常需要薄膜或基板薄膜来保护，可弯曲显示基板薄膜不仅可以作为显示基板薄膜来使用，也可以作为保护背电极的基板薄膜来使用，成本低廉；可弯曲显示基板薄膜的结构具有阻气性薄膜的性能，当凸起部10的排列方向和显示基板薄膜所要求的弯曲方向一致，即可实现整个OLED显示装置的弯曲，具体地，当显示基板薄膜要求纵向弯曲，那么玻璃薄膜1上的多个凸起部10可以纵向排列或呈阵列式排列，当显示基板薄膜要求横向弯曲，那么玻璃薄膜1上的多个凸起部10可以横向排列或呈阵列式排列；由于不需要镀膜工艺既可以实现高效的阻气性，降低了OLED显示装置的成本。优选地，所述显示装置可以为电子纸显示装置；使用上述可弯曲显示基板薄膜，制作驱动背板，可以有效降低柔性电子纸显示的成本；电子纸显示主要满足于纸张的替代，低成本是基本要求。可弯曲显示基板薄膜使用低廉的塑料薄膜2和玻璃薄膜1即可满足要求，为电子纸应用普及创造条件。The present invention further provides a display device comprising the flexible display substrate film according to any of the above embodiments; preferably, the display device may be a liquid crystal display device, an organic light emitting diode display device or an electronic paper display When the display device is a liquid crystal display device, a liquid crystal display device of different display modes such as TN (twisted nematic), STN (super twisted nematic), IPS, PDLC, Ch-LCD, VA, and FLC can be fabricated. Among them, the liquid crystal display device of the TN display mode can be classified into two types: passive and active. In the passive display, the plastic film 2 side can be used as the inner surface of the liquid crystal cell, or the glass film 1 side can be used as the The inner surface, or the side of the plastic film 2 and the side of the glass film 1 are respectively used as the inner surface, and the combination of the inner surface of the liquid crystal cell is low due to the low temperature of the manufacturing process environment, and the thickness uniformity of the liquid crystal cell is not high. Preferably, the glass film 1 is used as the inner surface of the liquid crystal cell, the manufacturing process environment in the process of manufacturing the liquid crystal cell can be satisfied, the expansion ratio is low, and the precision of the active device can be precisely controlled. Degree, forming a uniform active device; STN, PDLC, Ch-LCD, passive VA and passive FLC liquid crystal cell configuration is similar to passive TN form, while IPS, active FLC and active VA use glass film 1 As an inner surface, it is advantageous, but such an arrangement is not absolute. If an OTFT or an organic transparent electrode is used, the plastic film 2 can be considered as the inner surface of the liquid crystal cell, and the flexible display substrate film of the liquid crystal display device is used in two. It is required that the bending directions of the two display substrate films are uniform. Specifically, assuming that one of the plurality of convex portions 10 of the display substrate film is longitudinally aligned on the glass film 1, the plurality of convex portions 10 of the other display substrate film are in the glass. The film 1 is arranged longitudinally or in an array, and assuming that a plurality of convex portions 10 of the substrate film are laterally arranged on the glass film 1, the other plurality of convex portions 10 of the display substrate film are on the glass film 1. Horizontally arranged or arranged in an array. There are many kinds of liquid crystal display devices, and the material combination is selective. In the actual application process, according to the characteristics of the film and the manufacturing process environment, the optimal combination is not listed here. No matter which combination is used, the flexible display substrate film can be achieved. The purpose of bending can effectively avoid the occurrence of excessive bending defects, and the gas barrier property is not inferior to the pure glass substrate thin film liquid crystal cell. Preferably, the display device may be an organic light emitting diode display device, and when the display device is an organic light emitting diode display device, a display device capable of forming a top or bottom light; an organic light emitting diode (OLED) may be divided according to a driving principle. There are two types of active and passive display. According to the luminescent materials, they can be divided into two types: polymer materials and small molecular materials. Among them, passive driving has low requirements on substrate films, and substrate film materials are easy. To meet the display requirements, active-driven OLEDs have more stringent requirements on charge mobility and uniformity than active-powered liquid crystal display devices because OLEDs are current-type devices. In addition, materials constituting OLEDs, such as The organic light-emitting layer, the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are all organic materials, and are more sensitive to oxygen molecules and water molecules, so that the gas barrier property of the display substrate film is very high, and reference is made. The above related description of the liquid crystal display device, the bendable display substrate film is a very suitable form, because the OLED uses a single layer of a flexible display substrate film, and the electrodes and display materials are laminated, so the curved form seems to be easy to implement. However, in fact, the harsh gas barrier requirements, in addition to the display substrate film, the protection of the back electrode side usually requires a film or substrate film to protect, the flexible display substrate film can be used not only as a display substrate film, but also as a protection The substrate film of the back electrode is used at a low cost; the structure of the flexible display substrate film has a resistance The performance of the gas film can achieve the bending of the entire OLED display device when the arrangement direction of the protrusions 10 and the bending direction required for the display substrate film are uniform. Specifically, when the display substrate film is required to be longitudinally bent, the glass film 1 is The plurality of raised portions 10 may be arranged longitudinally or in an array. When the display substrate film is required to be laterally curved, the plurality of raised portions 10 on the glass film 1 may be arranged side by side or in an array; since no coating is required The process can achieve high gas barrier properties and reduce the cost of the OLED display device. Preferably, the display device may be an electronic paper display device; using the above flexible display substrate film to fabricate a driving back plate, the cost of the flexible electronic paper display can be effectively reduced; the electronic paper display is mainly satisfied with the replacement of the paper, and the low cost is basic requirements. The flexible display substrate film can meet the requirements by using the inexpensive plastic film 2 and the glass film 1, and create conditions for the popular use of electronic paper.
本发明还提供了一种可弯曲显示基板薄膜制造方法，用于制造上述所述的可弯曲显示基板薄膜，且包括如下步骤：利用压延法或蚀刻法成型上表面具有多个凸起部10的玻璃薄膜1；对成型后的玻璃薄膜1进行激光切割，得到所需尺寸的玻璃薄膜1；对玻璃薄膜1和塑料薄膜2进行清洗干燥；将塑料薄膜2包覆到玻璃薄膜1上；利用层压法将玻璃薄膜1和塑料薄膜2复合一体；进行层压时的加热温度高于塑料薄膜2的软化点温度且低于玻璃薄膜1的软化点温度；对与玻璃薄膜1复合一体的塑料薄膜2进行激光切割得到所需尺寸的边缘部分22。优选地，玻璃薄膜1和塑料薄膜2均使用板状材料，这样有利于形成高精度的凸起部10，也有利于增加两种材料结合的紧密程度，同时，玻璃薄膜1和塑料薄膜2即使存在少量的缺陷，在制造方法的加热加工过程中也会被自动修复；层压过程中通常不需要使用粘合剂，通过单纯的加热就可以复合，当叠加的塑料薄膜2和玻璃薄膜1直接粘合困难时，可以考虑使用透明粘合剂粘合。 The present invention also provides a method for manufacturing a flexible display substrate film for manufacturing the above-described flexible display substrate film, and comprising the steps of: forming a plurality of convex portions 10 on the upper surface by calendering or etching. Glass film 1; laser-cutting the formed glass film 1 to obtain a glass film 1 of a desired size; cleaning and drying the glass film 1 and the plastic film 2; coating the plastic film 2 on the glass film 1; The glass film 1 and the plastic film 2 are integrated by a pressing method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film 2 and lower than the softening point temperature of the glass film 1; and the plastic film integrated with the glass film 1 2 Laser cutting is performed to obtain the edge portion 22 of a desired size. Preferably, both the glass film 1 and the plastic film 2 use a plate-like material, which is advantageous for forming the high-precision protrusions 10, and is also advantageous for increasing the tightness of the combination of the two materials, and at the same time, the glass film 1 and the plastic film 2 even There are a few defects, which are also automatically repaired during the heating process of the manufacturing method; the laminating process usually does not require the use of an adhesive, and can be compounded by simple heating, when the superposed plastic film 2 and the glass film 1 are directly When bonding is difficult, it is conceivable to use a transparent adhesive for bonding.
本发明制造工艺简单，具有优异的阻气性，成本低廉。因为玻璃薄膜1厚度调整方便，容易降低可弯曲显示基板薄膜的重量，利用薄膜的缓冲减震，使得曲显示基板薄膜的抗跌落和耐机械冲击性能很高。通过在玻璃薄膜1表面附着凸起部10，相当于玻璃薄膜1厚度显著增加，进而提高显示基板薄膜的耐热冲击能力；玻璃薄膜1边缘布设凸起部10，辅以塑料薄膜2的包裹，有效避免了边缘缺陷的发生；玻璃薄膜1的凸起部10设计和塑料薄膜2的凹陷部20设计，能有效避免过弯曲缺陷，提高可弯曲显示基板薄膜的热耐冲击和机械冲击能力；同时玻璃薄膜1可起到阻水阻氧的作用。当塑料薄膜2作为内表面时，从塑料边缘渗入的氧气、水分，因为边缘凸起11的设计被降低或大部分阻隔，整个显示基板薄膜的阻气性实现，不需要昂贵的真空镀无机薄膜结构，又能避免玻璃薄膜1的缺陷，提高对制造工艺环境的耐受力，可以实现低成本的可弯曲显示。制作出的OLED显示装置，和单一玻璃薄膜1相比，具有相同寿命的显示性能，因此，特别适合用于长寿命的显示装置制造。玻璃薄膜1的凸起部10和塑料薄膜2的凹陷部20可抑制具有高线性膨胀系数的塑料薄膜2的热膨胀，进而获得线性膨胀系数较小的显示基板薄膜材料，适用于高分辨率显示装置的应用。一般而言，玻璃薄膜1的断裂是由应力集中于表面的微小缺陷而引起的，玻璃薄膜1的厚度变薄则越容易产生断裂，故难以实现薄型化，本发明所述显示基板薄膜，由于在玻璃薄膜1表面配置合适形状和密度的凸起部10，显著增强玻璃薄膜1自身的强度和韧性，同时塑料薄膜2降低外力冲击影响，使变形时朝向缺陷方向上的撕裂应力得以缓和，能获得优异的可弯曲性基板，故可使二次加工性及可操作性获得明显提升。本发明能够避免因过度弯曲而造成基板薄膜缺陷的发生，并具有刚性强、膨胀率低和平面延展性好的特点，同时兼具优异的阻氧、阻水蒸气的性能，而且非透明或透明的形式均可实现，加工制造简单、成本低廉，通过选择耐高温的塑料薄膜2材料使基板薄膜具有耐受温度高等特点。低成本、高可靠性，能够避免外力冲击造成的显性或隐性缺陷，坚固耐用。The invention has simple manufacturing process, excellent gas barrier property and low cost. Since the thickness of the glass film 1 is easily adjusted, it is easy to reduce the weight of the film of the flexible display substrate, and the shock absorption of the film is utilized to make the film of the curved display substrate have high drop resistance and mechanical shock resistance. By attaching the convex portion 10 to the surface of the glass film 1, the thickness of the glass film 1 is significantly increased, thereby improving the thermal shock resistance of the display substrate film; the convex portion 10 is disposed on the edge of the glass film 1, supplemented by the wrapping of the plastic film 2, The occurrence of edge defects is effectively avoided; the design of the convex portion 10 of the glass film 1 and the recess portion 20 of the plastic film 2 can effectively avoid over-bending defects and improve the thermal shock resistance and mechanical impact capability of the flexible display substrate film; The glass film 1 can function as a water blocking and oxygen barrier. When the plastic film 2 is used as the inner surface, the oxygen and moisture infiltrated from the edge of the plastic are reduced or largely blocked by the design of the edge protrusions 11, and the gas barrier property of the entire display substrate film is realized, and an expensive vacuum-plated inorganic film is not required. The structure can avoid the defects of the glass film 1 and improve the tolerance to the manufacturing process environment, and can realize a low-cost bendable display. The produced OLED display device has display performance of the same lifetime as that of the single glass film 1, and is therefore particularly suitable for use in long-life display device manufacturing. The convex portion 10 of the glass film 1 and the depressed portion 20 of the plastic film 2 can suppress thermal expansion of the plastic film 2 having a high linear expansion coefficient, thereby obtaining a display substrate film material having a small linear expansion coefficient, and is suitable for a high resolution display device. Applications. In general, the rupture of the glass film 1 is caused by a small defect in which the stress concentrates on the surface, and the thickness of the glass film 1 becomes thinner, and the rupture is more likely to occur, so that it is difficult to achieve thinning, and the display substrate film of the present invention is The convex portion 10 having a proper shape and density disposed on the surface of the glass film 1 remarkably enhances the strength and toughness of the glass film 1 itself, and the plastic film 2 reduces the impact of the external force impact, so that the tearing stress in the direction of the defect during deformation is alleviated. Excellent substrate properties can be obtained, so that secondary workability and operability can be significantly improved. The invention can avoid the occurrence of defect of the substrate film due to excessive bending, and has the characteristics of strong rigidity, low expansion ratio and good planar ductility, and at the same time has excellent oxygen barrier and water vapor barrier properties, and is non-transparent or transparent. The form can be realized, the processing is simple and the cost is low, and the substrate film has the characteristics of high temperature tolerance by selecting the high temperature resistant plastic film 2 material. Low cost, high reliability, can avoid the dominant or hidden defects caused by external impact, and is durable.
本发明玻璃薄膜1的所有边缘(侧面)均被塑料薄膜2所围绕；塑料薄膜2和玻璃薄膜1通过加热粘结方式或使用透明粘结剂结合为一体，玻璃薄膜1和塑料薄膜2的表面均为光滑平面；优选采用有碱玻璃和无碱玻璃材料制作玻璃薄膜1，优选采用PET、PEN、TAC和PI等材料制作塑料薄膜2。All the edges (sides) of the glass film 1 of the present invention are surrounded by the plastic film 2; the plastic film 2 and the glass film 1 are integrally bonded by heat bonding or using a transparent adhesive, and the surfaces of the glass film 1 and the plastic film 2 are integrated. Both are smooth planes; glass film 1 is preferably made of alkali glass and alkali-free glass material, and plastic film 2 is preferably made of materials such as PET, PEN, TAC and PI.
下面结合各组成部分的具体尺寸参数来说明本发明所述显示基板薄膜的应 用示例，具体地，玻璃薄膜1(包括凸起部10)采用无碱玻璃，塑料薄膜2采用PEN材料；The following should be combined with the specific size parameters of the respective components to illustrate the display substrate film of the present invention. By way of example, specifically, the glass film 1 (including the convex portion 10) is made of alkali-free glass, and the plastic film 2 is made of PEN material;
如图2、图3所示，设定凸起部10为三棱柱形且在玻璃薄膜1表面横向排列，优选纵截面为等腰三角形的三棱柱形，相邻凸起部10之间的中心间距W为80μm，相邻凹陷部20之间的支撑凸起23的最大宽度为80μm，凸起部10的最大宽度Wg为80μm，凸起部10的凸起高度h为100μm；当显示基板薄膜向塑料薄膜2一侧弯曲时，在忽略塑料薄膜2的条件下，玻璃薄膜1凸起部10的曲率半径Rg为108μm，在对玻璃薄膜1的弯曲能力分析时，参考康宁
Figure PCTCN2016108986-appb-000013
玻璃，厚度为100μm的曲率半径是180mm，厚度为200μm的曲率半径是370mm；玻璃薄膜1凸起部10的曲率半径Rg＝108μm很小，故凸起部10不会影响玻璃薄膜1的弯曲性能；塑料薄膜2上相邻凹陷部20之间的支撑凸起23与玻璃薄膜1上的凸起部10共同作用，形成一个100μm左右厚度的混合层，其弯曲性能主要取决于玻璃薄膜1上凸起部10的弯曲能力。在显示基板薄膜向塑料薄膜2一侧弯曲时，塑料薄膜2上相邻凹陷部20之间的支撑凸起23的存在起到缓冲作用，在忽略塑料薄膜2的塑性形变的条件下，塑料薄膜2的支撑凸起23起到支撑玻璃薄膜1的作用，确保玻璃薄膜1不产生过度弯曲的缺陷。同样地，分析显示基板薄膜向玻璃薄膜1一侧弯曲的情况，显示基板薄膜具有纵向可弯曲性，若优选W＝Wp＝Wg，在忽略玻璃薄膜1存在的条件下，塑料薄膜2的曲率半径为
Figure PCTCN2016108986-appb-000014
进而得出Rp＝108μm，塑料薄膜2上的支撑凸起23和玻璃薄膜1上的凸起部10具有相同的曲率半径，注意这是基于忽略形变的假设条件，从几何形状考虑得到的结论；实际上塑料材料有很大的弹性形变范围，所以Rp在实际应用过程中也远远小于108μm，因为玻璃薄膜1上的凸起部10的存在，而且玻璃薄膜1的塑性形变可以忽略不计，显示基板薄膜向玻璃薄膜1一侧弯曲时，玻璃薄膜1上的凸起部10对塑料薄膜2有支撑作用，塑料薄膜2同样不会产生过度弯曲，进而确保玻璃薄膜1不产生缺陷。当玻璃薄膜1除凸起部10外的部分的厚度tg为100μm，塑料薄膜2除凹陷部20外的部分的厚度tp为200μm时，整个显示基板薄膜的厚度是400μm，可弯曲的曲率半径取决于玻璃薄膜1的曲率半径。As shown in FIGS. 2 and 3, the boss portion 10 is formed in a triangular prism shape and arranged laterally on the surface of the glass film 1, preferably a triangular prism having a longitudinal section of an isosceles triangle, and a center between adjacent convex portions 10. The pitch W is 80 μm, the maximum width of the support protrusion 23 between the adjacent depressed portions 20 is 80 μm, the maximum width W g of the convex portion 10 is 80 μm, and the convex height h of the convex portion 10 is 100 μm; When the film is bent toward the side of the plastic film 2, the radius of curvature R g of the convex portion 10 of the glass film 1 is 108 μm under the condition of ignoring the plastic film 2, and in the analysis of the bending ability of the glass film 1, reference is made to Corning.
Figure PCTCN2016108986-appb-000013
The glass has a radius of curvature of 180 μm having a thickness of 180 μm and a radius of curvature of 370 mm having a thickness of 200 μm; the radius of curvature R g =108 μm of the convex portion 10 of the glass film 1 is small, so that the convex portion 10 does not affect the bending of the glass film 1 The supporting protrusion 23 between the adjacent depressed portions 20 on the plastic film 2 cooperates with the convex portion 10 on the glass film 1 to form a mixed layer having a thickness of about 100 μm, and the bending property mainly depends on the glass film 1 The bending ability of the boss 10. When the display substrate film is bent toward the side of the plastic film 2, the presence of the support protrusions 23 between the adjacent depressed portions 20 on the plastic film 2 serves as a buffering effect, and the plastic film is neglected under the condition of plastic deformation of the plastic film 2. The support protrusions 23 of 2 function to support the glass film 1, ensuring that the glass film 1 does not cause excessive bending defects. Similarly, the analysis shows that the substrate film is bent toward the glass film 1 side, and the substrate film has a longitudinal bendability. If W = W p = W g is preferred, the plastic film 2 is omitted under the condition that the glass film 1 is omitted. Curvature radius is
Figure PCTCN2016108986-appb-000014
Further, it is found that R p = 108 μm, the support protrusion 23 on the plastic film 2 and the convex portion 10 on the glass film 1 have the same radius of curvature, note that this is based on the assumption that the deformation is neglected, and the conclusion from the geometrical consideration is obtained. In fact, the plastic material has a large elastic deformation range, so R p is also much smaller than 108 μm in practical application because of the presence of the convex portion 10 on the glass film 1, and the plastic deformation of the glass film 1 is negligible. When the substrate film is bent toward the glass film 1 side, the convex portion 10 on the glass film 1 supports the plastic film 2, and the plastic film 2 does not excessively bend, thereby ensuring that the glass film 1 does not cause defects. When the thickness t g of the portion other than the convex portion 10 of the glass film 1 is 100 μm, and the thickness t p of the portion of the plastic film 2 other than the depressed portion 20 is 200 μm, the thickness of the entire display substrate film is 400 μm, and the curvature is bendable. The radius depends on the radius of curvature of the glass film 1.
如图4、图5所示，设定凸起部10为四棱柱形且在玻璃薄膜1表面横向排列，优选纵截面为等腰梯形的四棱柱形，等腰梯形的上底宽度Wg0＝40μm，相邻 凸起部10之间的中心间距W＝80μm，相邻凹陷部20之间的支撑凸起23的最大宽度Wp＝80μm，凸起部10的最大宽度(等腰梯形的下底宽度)Wg＝80μm，凸起部10的凸起高度h＝100μm时，可弯曲显示基板薄膜具有纵向可弯曲性；若优选W＝Wp＝Wg，在忽略塑料薄膜2存在的条件下，在显示基板薄膜向塑料薄膜2一侧弯曲时，玻璃薄膜1的曲率半径
Figure PCTCN2016108986-appb-000015
该曲率半径大于凸起部10为三菱柱形的曲率半径108μm，但远小于厚度为100μm的玻璃薄膜1曲率半径，因此凸起部10不会影响玻璃薄膜1的弯曲性能；塑料薄膜2上相邻凹陷部20之间的支撑凸起23与玻璃薄膜1上的凸起部10共同作用，形成一个100μm左右厚度的混合层，其弯曲性能主要取决于玻璃薄膜1上凸起部10的弯曲能力。塑料薄膜2上相邻凹陷部20之间的支撑凸起23的存在起到缓冲作用，在忽略塑料薄膜2的塑性形变的条件下，塑料薄膜2的支撑凸起23起到支撑玻璃薄膜1的作用，确保玻璃薄膜1不产生过度弯曲的缺陷。同样地，分析显示基板薄膜向玻璃薄膜1一侧弯曲的情况，显示基板薄膜具有纵向可弯曲性，若优选W＝Wp＝Wg，在忽略玻璃薄膜1存在的条件下，塑料薄膜2的曲率半径
Figure PCTCN2016108986-appb-000016
因为玻璃薄膜1上的凸起部10的存在，且玻璃薄膜1的塑性形变可以忽略不计，在显示基板薄膜向玻璃薄膜1一侧弯曲时，玻璃薄膜1上的凸起部10对塑料薄膜2有支撑作用，塑料薄膜2同样不会产生过度弯曲，确保玻璃薄膜1不产生缺陷。从显示基板薄膜的曲率半径来看，凸起部10为四棱柱形的曲率半径要大于凸起部10为三棱柱形的曲率半径，所以当玻璃薄膜1的弯曲能力低时，采用四棱柱的凸起部10更有利于避免可弯曲显示基板薄膜的过度弯曲。当玻璃薄膜1除凸起部10外的部分的厚度tg为100μm，塑料薄膜2除凹陷部20外的部分的厚度tp为200μm时，整个显示基板薄膜的厚度是400μm，可弯曲的曲率半径取决于玻璃薄膜1的曲率半径。As shown in FIGS. 4 and 5, the boss portion 10 is formed in a quadrangular prism shape and arranged laterally on the surface of the glass film 1, preferably in a quadrangular prism shape having an isosceles trapezoidal longitudinal section, and an upper base width W g0 of the isosceles trapezoid. 40 μm, the center-to-center spacing W between adjacent convex portions 10 is 80 μm, the maximum width of the supporting protrusions 23 between adjacent concave portions 20 is W p = 80 μm, and the maximum width of the convex portion 10 (under the isosceles trapezoid) When the bottom width is W g = 80 μm, and the protrusion height h of the convex portion 10 is h = 100 μm, the bendable display substrate film has longitudinal flexibility; if W = W p = W g is preferred, the condition of the plastic film 2 is ignored. Next, when the display substrate film is bent toward the side of the plastic film 2, the radius of curvature of the glass film 1
Figure PCTCN2016108986-appb-000015
The radius of curvature is larger than the radius of curvature of the triangular portion 10 of the convex portion 10, but is much smaller than the radius of curvature of the glass film 1 having a thickness of 100 μm, so that the convex portion 10 does not affect the bending property of the glass film 1; The supporting protrusions 23 between the adjacent depressed portions 20 cooperate with the convex portions 10 on the glass film 1 to form a mixed layer having a thickness of about 100 μm, and the bending property mainly depends on the bending ability of the convex portion 10 on the glass film 1. . The presence of the support protrusions 23 between the adjacent depressed portions 20 on the plastic film 2 serves as a buffering function, and the support protrusions 23 of the plastic film 2 serve to support the glass film 1 under the condition of ignoring the plastic deformation of the plastic film 2. The effect is to ensure that the glass film 1 does not cause excessive bending defects. Similarly, the analysis shows that the substrate film is bent toward the glass film 1 side, and the substrate film has a longitudinal bendability. If W = W p = W g is preferred, the plastic film 2 is omitted under the condition that the glass film 1 is omitted. Radius of curvature
Figure PCTCN2016108986-appb-000016
Because of the presence of the raised portion 10 on the glass film 1, and the plastic deformation of the glass film 1 is negligible, when the display substrate film is bent toward the glass film 1 side, the convex portion 10 on the glass film 1 is applied to the plastic film 2 With the support effect, the plastic film 2 also does not excessively bend, ensuring that the glass film 1 does not cause defects. From the viewpoint of the radius of curvature of the display substrate film, the convex portion 10 has a radius of curvature of a quadrangular prism shape larger than that of the convex portion 10 as a triangular prism shape, so when the bending property of the glass film 1 is low, a quadrangular prism is used. The raised portion 10 is more advantageous in avoiding excessive bending of the bendable display substrate film. When the thickness t g of the portion other than the convex portion 10 of the glass film 1 is 100 μm, and the thickness t p of the portion of the plastic film 2 other than the depressed portion 20 is 200 μm, the thickness of the entire display substrate film is 400 μm, and the curvature is bendable. The radius depends on the radius of curvature of the glass film 1.
如图6所示，设定凸起部10为四棱锥形且在玻璃薄膜1表面呈阵列式排列，凸起部10的四棱锥形几何尺寸为低面边长为80μm，高为100μm，各凸起部10之间的纵向中心距或横向中心距为120μm，玻璃薄膜1除凸起部10外的部分的厚度100μm，塑料薄膜2除凹陷部20外的部分的厚度为200μm，塑料薄膜2的凹陷部20的几何尺寸也为低面边长为80μm，高为100μm。整个显示 基板薄膜的厚度是400μm，曲率半径取决于玻璃薄膜1，最优的弯曲方向沿着四棱锥的底边方向。As shown in FIG. 6, the protrusions 10 are arranged in a quadrangular pyramid shape and arranged in an array on the surface of the glass film 1. The pyramidal geometry of the protrusions 10 is 80 μm on the low side and 100 μm on the height. The longitudinal center-to-center or lateral center-to-center distance between the bosses 10 is 120 μm, the thickness of the portion of the glass film 1 excluding the boss portion 10 is 100 μm, and the thickness of the portion of the plastic film 2 excluding the recessed portion 20 is 200 μm, and the plastic film 2 The geometry of the recess 20 is also a low side length of 80 μm and a height of 100 μm. Entire display The thickness of the substrate film is 400 μm, and the radius of curvature depends on the glass film 1, and the optimum bending direction is along the bottom side of the quadrangular pyramid.
如图7所示，设定凸起部10为四棱台形且在玻璃薄膜1表面呈阵列式排列，凸起部10的四棱台几何尺寸为上底面边长为40μm，下底面边长为80μm，高为100μm，各凸起部10的上底面之间的中心距为120μm，或者各凸起部10的下底面之间的中心距为120μm，玻璃薄膜1除凸起部10外的厚度为100μm，塑料薄膜2除凹陷部20外的厚度为200μm，塑料薄膜2的凹陷部20几何尺寸也为上底面边长为40μm，下底面边长为80μm，高为100μm。整个可弯曲显示基板薄膜的厚度是400μm，可弯曲的曲率半径取决于玻璃薄膜1，最优的弯曲方向沿着四棱台的底边方向。As shown in FIG. 7, the protrusions 10 are arranged in a quadrangular shape and arranged in an array on the surface of the glass film 1. The quadrangular geometry of the protrusions 10 is 40 μm on the upper side and the side on the bottom side is 80 μm, height is 100 μm, the center distance between the upper and lower surfaces of each convex portion 10 is 120 μm, or the center distance between the lower bottom surfaces of the convex portions 10 is 120 μm, and the thickness of the glass film 1 excluding the convex portion 10 The thickness of the plastic film 2 other than the depressed portion 20 is 200 μm, and the geometrical size of the depressed portion 20 of the plastic film 2 is also 40 μm in the upper bottom side, 80 μm in the lower bottom side, and 100 μm in height. The thickness of the entire flexible display substrate film is 400 μm, and the bendable radius of curvature depends on the glass film 1, and the optimum bending direction is along the bottom edge direction of the quadrangular prism.
如图8、图9所示，设定凸起部10为球冠形且在玻璃薄膜1表面呈阵列式排列，凸起部10的球冠形几何尺寸是底面半径为120μm，高为100μm，各凸起部10的底面之间中心距为160μm，玻璃薄膜1除凸起部10外的厚度为100μm，塑料薄膜2除凹陷部20外的厚度为200μm，塑料薄膜2的凹陷部20球冠形几何尺寸是底面半径为100μm，高为100μm，各凸起部10的底面中心距为160μm。整个可弯曲显示基板薄膜的厚度是400μm，可弯曲的曲率半径取决于玻璃薄膜1，没有固定的最优的弯曲方向，在各个弯曲方向上基本相同。As shown in FIG. 8 and FIG. 9, the protrusions 10 are spherically shaped and arranged in an array on the surface of the glass film 1. The spherical crown of the protrusion 10 has a radius of 120 μm and a height of 100 μm. The center distance between the bottom surfaces of the convex portions 10 is 160 μm, the thickness of the glass film 1 except the convex portion 10 is 100 μm, the thickness of the plastic film 2 except the concave portion 20 is 200 μm, and the concave portion of the plastic film 2 is spherical. The geometrical dimensions are a radius of the bottom surface of 100 μm and a height of 100 μm, and the center distance of the bottom surface of each convex portion 10 is 160 μm. The thickness of the entire flexible display substrate film is 400 μm, and the bendable radius of curvature depends on the glass film 1, and there is no fixed optimum bending direction, which is substantially the same in each bending direction.
在所述玻璃薄膜1上表面上还设置有边缘凸起11，所述边缘凸起11位于所述玻璃薄膜1边缘的预定距离范围内；这些边缘凸起11能有效降低各种缺陷的产生。根据实际情况凸起的截面形状设计成三角形、梯形、弧形、半圆形或半椭圆形。在具体实施例中截面形状设置成半圆形，半径为100μm，高为100μm。边缘凸起11也可以参照玻璃薄膜1上的凸起形状、分布方向和密度设计，缺点是不一定具有最佳的保护效果，优点是匹配任意面积的基板薄膜，弯曲性能与基板薄膜一致。当玻璃边缘的凸起高度和玻璃薄膜1厚度之和小于100μm时，边缘凸起11设置为封闭形状能更有效避免缺陷的发生，同时又不影响弯曲性能。Edge projections 11 are also provided on the upper surface of the glass film 1, and the edge projections 11 are located within a predetermined distance from the edge of the glass film 1. These edge projections 11 can effectively reduce the occurrence of various defects. According to the actual situation, the convex cross-sectional shape is designed to be triangular, trapezoidal, curved, semi-circular or semi-elliptical. In a specific embodiment, the cross-sectional shape is set to a semicircle with a radius of 100 μm and a height of 100 μm. The edge protrusion 11 can also be designed with reference to the convex shape, distribution direction and density on the glass film 1. The disadvantage is that it does not necessarily have an optimum protection effect, and the advantage is that the substrate film of any area is matched, and the bending property is consistent with the substrate film. When the sum of the protrusion height of the glass edge and the thickness of the glass film 1 is less than 100 μm, the edge protrusion 11 is provided in a closed shape to more effectively prevent the occurrence of defects without affecting the bending property.
另外，对于无源显示器件，采用碱玻璃，如钠玻璃和中性硅酸硼玻璃，可以有效降低成本；对于有源器件，采用无碱玻璃，主要是无碱铝硅酸盐玻璃，该类玻璃具有较好的化学稳定性、电绝缘性；优选地，塑料薄膜2边缘部分22的宽度选择为500μm；当以玻璃薄膜1表面作为显示基准面时，通过研磨的方式使玻璃薄膜1的表面波纹度等于0.3μm/20mm。 In addition, for passive display devices, alkali glass, such as soda glass and neutral borosilicate glass, can effectively reduce the cost; for active devices, alkali-free glass, mainly alkali-free aluminosilicate glass, is used. The glass has good chemical stability and electrical insulation; preferably, the width of the edge portion 22 of the plastic film 2 is selected to be 500 μm; when the surface of the glass film 1 is used as a display reference surface, the surface of the glass film 1 is ground by grinding. The waviness is equal to 0.3 μm / 20 mm.
下面结合制造方法的具体步骤来说明本发明所述显示基板薄膜的制造方法应用示例：Hereinafter, an application example of the manufacturing method of the display substrate film of the present invention will be described in conjunction with specific steps of the manufacturing method:
把厚度为0.3mm的玻璃基板熔融，利用压延法形成具有多个结构为三棱柱形的凸起部10的玻璃薄膜1，其中玻璃薄膜1除凸起部10外的厚度为100μm，凸起部10的凸起高度为100μm，凸起部10的最大宽度为100μm；对成型后的玻璃薄膜1进行激光切割，得到所需尺寸的玻璃薄膜1，保证玻璃薄膜1边缘纵向为三棱柱形凸起形状，横向凸起分布密度和方向与玻璃薄膜1内部一致；对玻璃薄膜1和塑料薄膜2进行清洗干燥；将厚度为400μm的塑料薄膜2覆盖到玻璃薄膜1上，保证塑料薄膜2外缘大于玻璃薄膜11mm，利用层压法将玻璃薄膜1和塑料薄膜2复合一体；使用激光切割方式修正塑料薄膜2的边缘部分22的宽度为500μm，塑料薄膜2的边缘部分22的厚度为350μm；抛光玻璃薄膜1表面，使其玻璃薄膜1的表面波纹度等于0.3μm/20mm，整个可弯曲显示基板薄膜的厚度为350μm。A glass substrate having a thickness of 0.3 mm is melted, and a glass film 1 having a plurality of convex portions 10 having a triangular prism shape is formed by a calendering method, wherein the glass film 1 has a thickness of 100 μm excluding the convex portion 10, and the convex portion The protrusion height of 10 is 100 μm, and the maximum width of the protrusion 10 is 100 μm; laser cutting of the formed glass film 1 is performed to obtain a glass film 1 of a desired size, and the edge of the glass film 1 is longitudinally triangular prism-shaped. The shape, the lateral convex distribution density and the direction are consistent with the inside of the glass film 1; the glass film 1 and the plastic film 2 are cleaned and dried; the plastic film 2 having a thickness of 400 μm is covered on the glass film 1 to ensure that the outer edge of the plastic film 2 is larger than The glass film is 11 mm, and the glass film 1 and the plastic film 2 are integrated by a lamination method; the width of the edge portion 22 of the plastic film 2 is corrected to 500 μm by laser cutting, and the thickness of the edge portion 22 of the plastic film 2 is 350 μm; The surface of the film 1 was such that the surface waviness of the glass film 1 was equal to 0.3 μm / 20 mm, and the thickness of the entire flexible display substrate film was 350 μm.
利用蚀刻法在厚度为100μm的玻璃基板上形成结构为四棱柱形的多个凸起部10，玻璃薄膜1除凸起部10外的部分的厚度是50μm，凸起部10的凸起高度为50μm，凸起部10的最大宽度为50μm，玻璃薄膜1边缘的密闭凸起为三棱柱形，高度为50μm，宽度为50微米；对成型后的玻璃薄膜1进行激光切割，得到所需尺寸的玻璃薄膜1，保证玻璃四周为三棱柱凸起形状环绕；对玻璃薄膜1和塑料薄膜2进行清洗干燥；将厚度为200μm的塑料薄膜2覆盖到玻璃薄膜1上，保证塑料薄膜2外缘大于玻璃薄膜11mm，利用层压法将玻璃薄膜1和塑料薄膜2复合一体；使用激光切割方式修正塑料薄膜2的边缘部分22的宽度为500μm，塑料薄膜2的边缘部分22的厚度为200μm；抛光玻璃薄膜1表面，使其玻璃薄膜1的表面波纹度等于0.5μm/20mm，整个可弯曲显示基板薄膜的厚度为200μm；塑料薄膜2的厚度为100μm。A plurality of convex portions 10 having a quadrangular prism shape are formed on a glass substrate having a thickness of 100 μm by an etching method, and a thickness of a portion of the glass film 1 excluding the convex portion 10 is 50 μm, and a convex height of the convex portion 10 is 50 μm, the maximum width of the convex portion 10 is 50 μm, the closed protrusion of the edge of the glass film 1 is a triangular prism shape, the height is 50 μm, and the width is 50 μm; the formed glass film 1 is laser-cut to obtain a desired size. The glass film 1 ensures that the periphery of the glass is surrounded by a triangular prism shape; the glass film 1 and the plastic film 2 are cleaned and dried; the plastic film 2 having a thickness of 200 μm is covered on the glass film 1 to ensure that the outer edge of the plastic film 2 is larger than the glass. 11 mm, the glass film 1 and the plastic film 2 are integrated by lamination; the width of the edge portion 22 of the plastic film 2 is 500 μm by laser cutting, and the thickness of the edge portion 22 of the plastic film 2 is 200 μm; The surface of the glass film 1 has a surface waviness of 0.5 μm/20 mm, the thickness of the entire flexible display substrate film is 200 μm, and the thickness of the plastic film 2 is 100 μm.
在上述显示基板薄膜的制造方法中，所述塑料薄膜2均采用PEN材料，层压法薄膜叠加温度为300℃，可以形成塑料薄膜2均匀覆盖于玻璃薄膜1的表面。In the above method for manufacturing a display substrate film, the plastic film 2 is made of a PEN material, and the lamination method has a film deposition temperature of 300 ° C, and the plastic film 2 can be formed to uniformly cover the surface of the glass film 1.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。 The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any technical person skilled in the art within the technical scope disclosed by the present invention, the technical solution according to the present invention Equivalent substitutions or modifications of the inventive concept are intended to be included within the scope of the invention.

Claims (10)

  1. 一种可弯曲显示基板薄膜，其特征在于包括：A flexible display substrate film characterized by comprising:
    玻璃薄膜；所述玻璃薄膜上表面具有多个凸起部；a glass film; the upper surface of the glass film has a plurality of convex portions;
    包覆所述玻璃薄膜的塑料薄膜；所述塑料薄膜下表面具有多个用于容纳所述凸起部的凹陷部。a plastic film covering the glass film; the lower surface of the plastic film has a plurality of recesses for accommodating the protrusions.
  2. 根据权利要求1所述的可弯曲显示基板薄膜，其特征在于多个所述凸起部在玻璃薄膜上表面横向排列、纵向排列、或者呈阵列式排列。The flexible display substrate film according to claim 1, wherein the plurality of convex portions are arranged laterally, longitudinally, or in an array on the upper surface of the glass film.
  3. 根据权利要求2所述的可弯曲显示基板薄膜，其特征在于当多个凸起部在玻璃薄膜上表面横向排列或纵向排列时，在距所述玻璃薄膜边缘的预定距离范围内设置有所述凸起部；当多个凸起部在玻璃薄膜上表面呈阵列式排列时，在距所述玻璃薄膜边缘的预定距离范围内设置有边缘凸起。The flexible display substrate film according to claim 2, wherein when the plurality of convex portions are arranged laterally or longitudinally on the upper surface of the glass film, the predetermined distance is provided within a predetermined distance from the edge of the glass film a raised portion; when the plurality of raised portions are arranged in an array on the upper surface of the glass film, edge projections are provided within a predetermined distance from the edge of the glass film.
  4. 根据权利要求1所述的可弯曲显示基板薄膜，其特征在于当多个凸起部在玻璃薄膜上表面横向排列或纵向排列时，所述凸起部为半圆柱形、三棱柱形、四棱柱形、长方体形或正方体形；当多个凸起部在玻璃薄膜上表面呈阵列式排列时，所述凸起部为四棱锥形、四棱台形、球冠形或正方体形。The flexible display substrate film according to claim 1, wherein when the plurality of convex portions are laterally arranged or longitudinally arranged on the upper surface of the glass film, the convex portions are semi-cylindrical, triangular prism-shaped, and quadrangular prism. a shape, a rectangular parallelepiped shape or a square shape; when the plurality of convex portions are arranged in an array on the upper surface of the glass film, the convex portion is a quadrangular pyramid shape, a quadrangular prism shape, a spherical crown shape or a square shape.
  5. 根据权利要求1所述的可弯曲显示基板薄膜，其特征在于所述塑料薄膜具有：与所述玻璃薄膜上表面相对设置的覆盖部分和与所述玻璃薄膜侧面相对设置的边缘部分。The flexible display substrate film according to claim 1, wherein the plastic film has a cover portion disposed opposite to an upper surface of the glass film and an edge portion disposed opposite to a side surface of the glass film.
  6. 根据权利要求1所述的可弯曲显示基板薄膜，其特征在于，The flexible display substrate film according to claim 1, wherein
    所述凸起部的凸起高度、以及凹陷部的凹陷深度均小于等于100μm；所述玻璃薄膜不包括凸起部的部分的厚度小于等于100μm；The convex height of the convex portion and the concave depth of the concave portion are all less than or equal to 100 μm; the thickness of the portion of the glass film not including the convex portion is less than or equal to 100 μm;
    所述可弯曲显示基板薄膜还包括：The flexible display substrate film further includes:
    配置于玻璃薄膜下表面和/或塑料薄膜上表面的电极；An electrode disposed on a lower surface of the glass film and/or an upper surface of the plastic film;
    配置于玻璃薄膜下表面和/或塑料薄膜上表面的薄膜晶体管。A thin film transistor disposed on the lower surface of the glass film and/or the upper surface of the plastic film.
  7. 根据权利要求5所述的可弯曲显示基板薄膜，其特征在于所述边缘部分的宽度大于100μm；所述覆盖部分不包括凹陷部的部分的厚度小于等于400μm；所述玻璃薄膜的表面波纹度小于等于0.5μm/20mm；所述塑料薄膜的表面粗糙度小于等于2nm。The flexible display substrate film according to claim 5, wherein the edge portion has a width of more than 100 μm; the portion of the covering portion not including the depressed portion has a thickness of 400 μm or less; and the surface waviness of the glass film is smaller than It is equal to 0.5 μm / 20 mm; the surface roughness of the plastic film is 2 nm or less.
  8. 一种可弯曲显示基板薄膜制造方法，其特征在于所述制造方法用于制造权利要求1所述的可弯曲显示基板薄膜，且包括如下步骤： A manufacturing method of a flexible display substrate film, characterized in that the manufacturing method is used for manufacturing the flexible display substrate film of claim 1, and comprises the following steps:
    利用压延法或蚀刻法成型上表面具有多个凸起部的玻璃薄膜；Forming a glass film having a plurality of convex portions on the upper surface by calendering or etching;
    对成型后的玻璃薄膜进行激光切割，得到所需尺寸的玻璃薄膜；Laser cutting the formed glass film to obtain a glass film of a desired size;
    对玻璃薄膜和塑料薄膜进行清洗干燥；Cleaning and drying glass film and plastic film;
    将塑料薄膜包覆到玻璃薄膜上；Coating a plastic film onto the glass film;
    利用层压法将玻璃薄膜和塑料薄膜复合一体；进行层压时的加热温度高于塑料薄膜的软化点温度且低于玻璃薄膜的软化点温度；The glass film and the plastic film are integrated by a lamination method; the heating temperature at the time of lamination is higher than the softening point temperature of the plastic film and lower than the softening point temperature of the glass film;
    对与玻璃薄膜复合一体的塑料薄膜进行激光切割得到所需尺寸的边缘部分。The plastic film composited with the glass film is laser cut to obtain an edge portion of a desired size.
  9. 一种显示装置，其特征在于所述显示装置具有权利要求1至7任一项所述的可弯曲显示基板薄膜。A display device characterized by having the bendable display substrate film according to any one of claims 1 to 7.
  10. 根据权利要求9所述的显示装置，其特征在于所述显示装置为液晶显示装置、有机发光二极管显示装置或电子纸显示装置。 A display device according to claim 9, wherein said display device is a liquid crystal display device, an organic light emitting diode display device or an electronic paper display device.
PCT/CN2016/108986 2016-03-23 2016-12-08 Bendable display substrate film, preparation method therefor, and display device WO2017161919A1 (en)

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