WO2023160259A1 - 柔性显示基板、显示面板和显示装置 - Google Patents

柔性显示基板、显示面板和显示装置 Download PDF

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Publication number
WO2023160259A1
WO2023160259A1 PCT/CN2023/070264 CN2023070264W WO2023160259A1 WO 2023160259 A1 WO2023160259 A1 WO 2023160259A1 CN 2023070264 W CN2023070264 W CN 2023070264W WO 2023160259 A1 WO2023160259 A1 WO 2023160259A1
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WIPO (PCT)
Prior art keywords
strip
area
shaped
flexible display
display substrate
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PCT/CN2023/070264
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English (en)
French (fr)
Inventor
赵旭亮
张�浩
赵佳
赵西玉
王品凡
Original Assignee
京东方科技集团股份有限公司
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Priority to US18/289,575 priority Critical patent/US20240251608A1/en
Publication of WO2023160259A1 publication Critical patent/WO2023160259A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/124—Insulating layers formed between TFT elements and OLED elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
    • H10K77/10—Substrates, e.g. flexible substrates
    • H10K77/111—Flexible substrates
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/311—Flexible OLED
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/549—Organic PV cells

Definitions

  • the present disclosure relates to the field of display devices, and in particular to a flexible display substrate, a display panel and a display device.
  • the stretchable flexible display substrate has a hollow structure, and the hollow structure is located in the peripheral area of the flexible display substrate, so that when the flexible display substrate is stretched, the peripheral area can produce stretching deformation, for example, the peripheral area can be attached to the peripheral area by stretching.
  • a curved screen design is realized on the frame of the installed terminal.
  • the stretching amount of the two adjacent sides of the flexible display substrate will squeeze and form wrinkles at the corners, which will affect the bonding effect.
  • Embodiments of the present disclosure provide a flexible display substrate, a display panel and a display device, which can improve the lamination wrinkle problem of a stretchable display panel. Described technical scheme is as follows:
  • an embodiment of the present disclosure provides a flexible display substrate, the flexible display substrate includes a peripheral area and a display area, and the peripheral area surrounds the display area;
  • the peripheral area has a plurality of corner areas, at least one of which includes two first areas and a second area between the two first areas;
  • the first area has a hollow structure, and the second area has at least one notch located at the edge of the flexible display substrate.
  • the notch is a semi-elliptical notch, a semicircular notch, a rectangular notch, a trapezoidal notch or an arc-shaped notch.
  • the long axis of the notch intersects with the edge where the notch is located and has an intersection point.
  • the major axis is the major axis of the ellipse or the semi-ellipse.
  • the major axis can be the symmetric axis with the largest length.
  • the major axis can be the longest line segment passing through the center of the graph with both endpoints at the edge of the graph.
  • the notch is a semi-elliptical notch.
  • the value range of the major axis of the semi-elliptical notch is 200-600 ⁇ m;
  • the value range of the minor axis of the semi-elliptical notch is 40-80 ⁇ m
  • the minimum distance between adjacent semi-elliptical notches ranges from 5 ⁇ m to 40 ⁇ m.
  • the second area includes:
  • the second sub-area is located at the center of the corner area.
  • the second sub-region is a non-hollowed-out region.
  • the flexible display substrate further includes peripheral circuits;
  • At least a portion of the peripheral circuitry is located within the second area.
  • the peripheral circuit includes a GOA circuit, and the GOA circuit is located in the second sub-area.
  • the hollow structure includes a plurality of I-shaped holes, and the plurality of I-shaped holes include at least one of a first through hole and a second through hole;
  • the first through hole includes a first bar-shaped body part and two trapezoidal parts, the two trapezoidal parts are respectively located at two ends of the first bar-shaped body part, and the upper bottom of the trapezoidal part is connected to the The first strip-shaped body parts are connected;
  • the second through hole includes a second strip-shaped main body and two strip-shaped branches, the two strip-shaped branches are respectively located at two ends of the second strip-shaped main body, and the strip-shaped branch The middle part is connected with the second bar-shaped main part.
  • the length of the first strip-shaped body portion or the second strip-shaped body portion ranges from 170 ⁇ m to 600 ⁇ m;
  • the value range of the length of the trapezoidal portion or the strip-shaped branch portion is 60-160 ⁇ m;
  • the width of the first strip-shaped main part and the trapezoidal part, or the second strip-shaped main body and the strip-shaped branch parts ranges from 4 to 50 ⁇ m;
  • the value range of the minimum distance between the adjacent I-shaped holes is 80-200 ⁇ m.
  • the gap between two adjacent I-shaped holes is a bridge area, and the gap surrounded by four adjacent I-shaped holes is an island area;
  • Wires are arranged in the bridge area, and peripheral circuits are arranged in the island area.
  • the display area has a hollow structure, and within a unit area, the area of the hollow structure located in the display area is larger than the area of the hollow structure located in the peripheral area.
  • the hollow structure of the display area includes a plurality of I-shaped holes, and the plurality of I-shaped holes include at least one of a first through hole and a second through hole;
  • the first through hole includes a first bar-shaped body part and two trapezoidal parts, the two trapezoidal parts are respectively located at two ends of the first bar-shaped body part, and the upper bottom of the trapezoidal part is connected to the The first strip-shaped body parts are connected;
  • the second through hole includes a second strip-shaped main body and two strip-shaped branches, the two strip-shaped branches are respectively located at two ends of the second strip-shaped main body, and the strip-shaped branch The middle part is connected with the second bar-shaped main part.
  • the length of the first bar-shaped main body or the second bar-shaped main body located in the display area is longer than the first bar-shaped main body or the second bar-shaped main body located in the peripheral area.
  • the length of the body of the bisect is longer than the first bar-shaped main body or the second bar-shaped main body located in the peripheral area.
  • the length of the first bar-shaped body part or the second bar-shaped body part ranges from 250 to 800 ⁇ m;
  • the value range of the length of the trapezoidal portion or the strip-shaped branch portion is 100-250 ⁇ m;
  • the width of the first strip-shaped main part and the trapezoidal part, or the second strip-shaped main body and the strip-shaped branch parts ranges from 4 to 50 ⁇ m;
  • the value range of the minimum distance between the adjacent I-shaped holes is 40-100 ⁇ m.
  • the area of the island area located in the display area is smaller than the area of the island area located in the peripheral area, and the width of the bridge area located in the display area is smaller than the width of the bridge area located in the peripheral area.
  • the flexible display substrate includes:
  • an embodiment of the present disclosure provides a display panel, which includes the flexible display substrate according to any one of the first aspect.
  • an embodiment of the present disclosure provides a display device, the display device including the display panel as described in the second aspect.
  • the notch By setting a notch at the edge of the second region in the middle of the corner region of the peripheral region of the flexible display substrate, when the peripheral region of the flexible display substrate is stretched downwards and attached to the frame of the installed terminal, the notch can absorb the time of fitting.
  • the shrinkage and deformation requirements of the corner area can be offset by the gap, thereby improving the problem of forming wrinkles in the corner area and improving the effect of the fit.
  • FIG. 1 is a regional schematic diagram of a flexible display substrate provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a flexible display substrate provided by an embodiment of the present disclosure
  • Fig. 3 is a schematic diagram of distribution of strain regions in corner regions provided by an embodiment of the present disclosure
  • Fig. 4 is a schematic diagram of the force on the corner area of the flexible display substrate provided by the embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of a peripheral circuit arrangement provided by an embodiment of the present disclosure.
  • Fig. 6 is a schematic diagram of dimensioning of a semi-elliptical notch provided by an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a first through hole provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a second through hole provided by an embodiment of the present disclosure.
  • Fig. 9 is a schematic diagram of the dimensions of the hollow structure provided by the embodiment of the present disclosure.
  • Fig. 10 is a schematic structural view of the I-shaped hole provided by the embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of a flexible display panel provided by an embodiment of the present disclosure.
  • Fig. 12 is a schematic structural diagram of a flexible display panel provided by an embodiment of the present disclosure.
  • Fig. 13 is a schematic diagram of dimensioning of a strip hole provided by an embodiment of the present disclosure.
  • FIG. 14 is a hierarchical schematic diagram of a flexible display substrate provided by an embodiment of the present disclosure.
  • FIG. 15 is a flowchart of a method for manufacturing a flexible display substrate provided by an embodiment of the present disclosure.
  • Words such as “connected” or “connected” are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Up”, “Down”, “Left”, “Right” and so on are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.
  • FIG. 1 is a schematic diagram of a region of a flexible display substrate provided by an embodiment of the present disclosure.
  • the flexible display substrate includes a peripheral area 1 and a display area 2 , and the peripheral area 1 surrounds the display area 2 .
  • FIG. 2 is a partial structural schematic diagram of a flexible display substrate provided by an embodiment of the present disclosure.
  • the peripheral area 1 has a plurality of corner regions 10 (only one of which is shown in the figure), for example, a rectangular flexible display substrate has four corner regions.
  • the rectangular flexible display substrate may be a right-angle flexible display substrate, or a round-corner flexible display substrate, which is not limited in the embodiments of the present disclosure.
  • the corner area 10 is an area including a corner, for example, a rectangular area with a corner as a corner, or a fan-shaped area with a corner as an arc, and the embodiment of the present disclosure does not limit the shape of the corner area 10 .
  • At least one of the corner regions 10 includes two first regions 11 and a second region 12 located between the two first regions 11; the first region 11 has a hollow structure 110, the hollow structure makes the flexible display substrate in When being stretched, stretching deformation can be generated, which facilitates lamination of flexible display substrates.
  • the second region 12 has at least one notch 120 located at the edge of the flexible display substrate, and the notch is used to absorb the compression deformation of the corner area of the flexible display substrate and improve the wrinkles caused by the compression deformation.
  • each corner region 10 in the flexible display substrate is arranged according to the above structure.
  • the notch can absorb the shrinkage and deformation requirements during lamination, and the deformation in the corner area can be offset by the notch, thereby improving the problem of wrinkle formation in the lamination at the corner area and improving the effect of lamination.
  • this lamination method can make the lamination depth of the peripheral area deeper, so that the proportion of the display area of the display surface of the display panel is larger, which is beneficial to increase the screen-to-body ratio.
  • FIG. 3 is a schematic diagram of distribution of strain regions in corner regions provided by an embodiment of the present disclosure.
  • the strain regions in the corner region include: two regions A with maximum compressive strain and two regions B with maximum tensile strain.
  • the region of maximum tensile strain B and the region of maximum compressive strain A overlap in the first region 11, while in the second region 12, both sides belong to the region of maximum compressive strain A, and the middle part is unstressed. force area.
  • the flexible display substrate also has a tensile strain extremely small area C and a compressive strain extremely small area D, which are usually located in the display area of the flexible display substrate.
  • FIG. 4 is a schematic diagram of force acting on a corner area of a flexible display substrate provided by an embodiment of the present disclosure.
  • both sides of the second region 12 are subject to relatively large compressive forces (as indicated by the arrows in the figure), which in turn cause wrinkles to be easily generated at this position.
  • the wrinkles are offset, thereby improving the fitting effect.
  • the second region 12 includes:
  • the second subregion 122 is located between the two first subregions 121, the first subregion 121 and the second subregion 122 Arranged along the extending direction of the edge of the flexible display substrate, the notches 120 are located in the two first sub-regions 121 .
  • the second sub-region 122 is located at the center of the corner region 10 .
  • the second sub-region 122 is the aforementioned unstressed region
  • the first sub-region 121 is the aforementioned region of maximum compressive strain, that is, the region subjected to relatively large compressive force in FIG. 4 . Therefore, disposing the notch 120 in the first sub-region 121 can alleviate or even eliminate the generation of wrinkles.
  • the second sub-region 122 is a stress-free region, the second sub-region 122 is a non-hollowed-out region, that is, neither a notch nor a hollowed-out structure is provided in the second sub-region 122 .
  • the second sub-region 122 is neither provided with a notch nor a hollow structure, a circuit structure can be provided in the second sub-region 122 .
  • FIG. 5 is a schematic diagram of a peripheral circuit arrangement provided by an embodiment of the present disclosure.
  • the flexible display substrate further includes a peripheral circuit 1220 , at least a part of which is located in the second region 12 . Due to the hollow structure 110 and the gap 120 provided in the peripheral area 1, the space originally used for arranging the peripheral circuit is compressed. Therefore, disposing at least part of the peripheral circuit 1220 in the second area 12 can relieve the compressed peripheral area. circuit space.
  • the peripheral circuit 1220 includes a gate of array (Gate of Array, GOA) circuit, and the GOA circuit is located in the second sub-region 122.
  • GOA gate of array
  • the notch 120 is a semi-elliptical notch.
  • the notch 120 may be in other shapes, for example, a semicircular notch, a rectangular notch, a trapezoidal notch, or an arc-shaped notch.
  • the long axis of the semi-elliptical notch intersects with the edge where the notch 120 is located and has an intersection point.
  • the major axis of the semi-elliptical notch is perpendicular to the edge where the notch 120 is located.
  • the major axis of the semi-elliptical notch is perpendicular to the side where the notch 120 is located; The tangent is vertical.
  • the short axis of the semi-elliptical notch may also intersect with the edge where the notch 120 is located, and there is no limitation to this.
  • Fig. 6 is a schematic diagram of dimension marking of a semi-elliptical notch provided by an embodiment of the present disclosure.
  • the value range of the major axis 2a of the semi-elliptical notch (a shown in Figure 6 is half of the major axis) is 200-600 ⁇ m
  • the value range of the minor axis b of the semi-elliptical notch is 40 ⁇ 80 ⁇ m
  • the minimum distance c between adjacent semi-elliptical notches ranges from 5 to 40 ⁇ m. It should be noted that, for the convenience of observation, the distance between adjacent notches is not shown in scale in the figure.
  • adjacent semi-elliptical notches generally refer to adjacent semi-elliptical notches in the same first sub-region 121 .
  • the major axis 2a of the semi-elliptical notches is 400 ⁇ m
  • the minor axis b of the semi-elliptical notches is 60 ⁇ m
  • the minimum distance c between adjacent semi-elliptical notches is 25 ⁇ m.
  • the hollow structure 110 includes a plurality of I-shaped holes.
  • the structure of the I-shaped hole is briefly described below in conjunction with the accompanying drawings:
  • the structure of the I-shaped hole can have two kinds, which are respectively the first through hole and the second through hole.
  • FIG. 7 is a schematic structural diagram of a first through hole provided by an embodiment of the present disclosure.
  • the first through hole 111 includes a first strip-shaped body portion 1111 and two trapezoidal portions 1112 , the two trapezoidal portions 1112 are respectively located at two ends of the first strip-shaped body portion 1111 , and the The upper bottom of the trapezoidal part 1112 is connected with the first bar-shaped main part 1111 .
  • the trapezoidal portion 212 is an isosceles trapezoid, and the upper base of the trapezoidal portion 212 coincides with the width side of the first strip-shaped main body portion 211 .
  • the trapezoidal part 212 is set as an isosceles trapezoid, and the upper bottom of the trapezoidal part 212 coincides with one side of the first bar-shaped main body part 211, so that the first through hole 21 is not only axially symmetrical, but also centrally symmetrical, so that the first through hole 21 Neat arrangement on flexible display substrates.
  • FIG. 8 is a schematic structural diagram of a second through hole provided by an embodiment of the present disclosure.
  • the second through hole 112 includes a second strip-shaped main body portion 1121 and two strip-shaped branch portions 1122 , and the two strip-shaped branch portions 1122 are respectively located on two sides of the second strip-shaped main body portion 1121 . end, and the middle part of the bar-shaped branch part 1122 is connected with the second bar-shaped main part 1121 .
  • the difference between the second through hole 112 and the first through hole 111 is that the shape of the end of the through hole is different.
  • the length direction of the strip-shaped branch portion 1122 is perpendicular to the length direction of the second strip-shaped main body portion 1121 , and the strip-shaped branch portion 1122 is symmetrical to the second strip-shaped main body portion 1121 .
  • Arranging the strip-shaped branch portion 1122 perpendicular to the second strip-shaped main body portion 1121, and making the strip-shaped branch portion 1122 symmetrical with respect to the second strip-shaped main body portion 1121 is also to make the second through hole 112 not only axially symmetrical, but also centrally symmetrical , to facilitate the orderly arrangement of the second through holes 112 on the flexible display substrate.
  • Fig. 9 is a schematic diagram of dimension marking of a hollow structure provided by an embodiment of the present disclosure.
  • the value range of the length a of the second strip-shaped main part 1121 is 170-600 ⁇ m
  • the value range of the length b of the strip-shaped branch part 1122 is The value range of the width c of the second strip-shaped main part 1121 and the strip-shaped branch part 1122 is 4-50 ⁇ m, and the value range of the minimum distance d between the adjacent I-shaped holes 80-200 ⁇ m.
  • the length a of the second strip-shaped main portion 1121 is 400 ⁇ m
  • the length b of the strip-shaped branch portion 1122 is 100 ⁇ m
  • the length a of the second strip-shaped main portion 1121 and the strip-shaped branch portion 1122 The width c is 30 ⁇ m
  • the minimum distance d between adjacent I-shaped holes is 150 ⁇ m.
  • the size of the first through hole is the same as the size of the aforementioned second through hole, that is:
  • the value range of the length of the first strip-shaped body part 1111 is 170-600 ⁇ m
  • the value range of the length of the trapezoidal part 1112 (that is, the length of the bottom of the trapezoidal part) is 60-160 ⁇ m
  • the first The width of the strip-shaped main part 1111 and the trapezoidal part 1112 (wherein the width of the trapezoidal part is also the height of the trapezoid) ranges from 4 to 50 ⁇ m
  • the value range of the minimum distance between the adjacent I-shaped holes is 80-200 ⁇ m.
  • Fig. 10 is a schematic diagram of the structure of the I-shaped hole provided by the embodiment of the present application.
  • the gap between two adjacent I-shaped holes is a bridge area 113
  • the gap surrounded by four adjacent I-shaped holes is an island area 114 .
  • a plurality of islands 114 are distributed in an array, adjacent islands 114 are connected by bridges 113, each island 114 is connected to four bridges 113 respectively, and the four bridges 113 are respectively connected to the islands 114 on different sides, and the connection between the bridge area 113 and the island area 114 is located at the end of the side.
  • wires are arranged in the bridge region 113 .
  • VDD power line
  • VSS common voltage line
  • the width of the bridge region 113 that is, the minimum distance d between the adjacent I-shaped holes, ranges from 80 to 200 ⁇ m.
  • the order of the width of the traces is also tens of ⁇ m, so the width of the bridge region 113 can meet the requirements of the traces.
  • the peripheral circuits may also be arranged in the island area 114 , so as to ensure that there is enough space for the peripheral circuits to be arranged.
  • the bridge area can arrange VDD, VSS and GOA traces and other traces at the same time.
  • the size of the island 114 arranged according to the above size is about 200 ⁇ m ⁇ 200 ⁇ m, while the unit size of the GOA circuit is about 100 ⁇ m ⁇ 150 um, so the above island design can meet the layout requirements of the GOA circuit.
  • FIG. 11 is a schematic structural diagram of a flexible display panel provided by an embodiment of the present disclosure.
  • the peripheral region 1 in addition to the corner regions 10 , the peripheral region 1 also includes a central region 13 located between adjacent corner regions 10 , and the central region 13 is provided with a hollow structure 110 .
  • the hollow structure 110 in the middle area 13 and the hollow structure 110 in the corner area 10 may be the same or different.
  • both the hollow structure 110 in the middle region 13 and the hollow structure 110 in the corner region 10 include I-shaped holes, and include I-shaped holes of the same shape and size.
  • the hollow structure 110 in the central region 13 and the hollow structure 110 in the corner region 10 include different shapes, or the same shape but different sizes, which will not be repeated here.
  • the hollow structure 110 may not only be composed of the aforementioned I-shaped holes, but may also be composed of strip-shaped holes, or both of the I-shaped holes and the strip-shaped holes.
  • the peripheral area may include multiple turns of I-shaped holes, for example, 5 turns, which is not limited in the embodiment of the present disclosure.
  • the arrangement directions of the I-shaped holes in two adjacent circles are different, for example, the directions are perpendicular to each other.
  • the display area 2 has a hollow structure 110 .
  • the area of the hollow structure 110 located in the display area 2 is larger than the area of the hollow structure 110 located in the peripheral area 1 .
  • the area of the hollow structure 110 refers to the area of the area surrounded by the inner wall of the hollow structure 110 on the surface of the flexible display substrate when the flexible display substrate is flattened and not deformed.
  • the area of the hollow structure located in the peripheral area 1 is smaller, so that the peripheral area can have more space for arranging peripheral circuits and traces.
  • the peripheral circuit; the four corners can be designed with greater curvature to increase the bonding depth, so as to hide the peripheral area to the side and achieve the effect of full-screen display.
  • the wiring m can also be arranged in the gap of the hollow structure at the edge of the display area 1 , which will not be repeated here.
  • the hollow structure 110 of the display area 2 includes a plurality of slit holes, and the slit holes include one of the first through hole 111 and the second through hole 112 .
  • the first through hole 111 includes a first strip-shaped body portion 1111 and two trapezoidal portions 1112, the two trapezoidal portions 1112 are respectively located at two ends of the first strip-shaped body portion 1111, and the trapezoidal portion 1112
  • the upper bottom of the upper body is connected with the first bar-shaped main body part 1111;
  • the second through hole 112 includes a second strip-shaped main part 1121 and two strip-shaped branch parts 1122, the two strip-shaped branch parts 1122 are respectively located at two ends of the second strip-shaped main part 1121, and the The middle part of the bar-shaped branch part 1122 is connected with the second bar-shaped main part 1121 .
  • the hollow structure 110 in the display area 2 and the hollow structure in the peripheral area 1 may be the same or different.
  • the hollow structure 110 of the display area 2 and the hollow structure 110 in the corner area 10 or the middle area 13 both include an I-shaped hole, and include the I-shaped hole of the same shape and size.
  • the hollow structure 110 of the display area 2 and the hollow structure 110 of the corner area 10 and the middle area 13 include different shapes, or the same shape but different sizes.
  • the through holes included in the hollow structure 110 of the display area 2 and the peripheral area 1 are all I-shaped holes, but the sizes of the I-shaped holes included in the two areas are different, for example, the bar shape of the I-shaped holes in the display area 2
  • the branch portion is longer, and the interval between adjacent I-shaped holes in the peripheral area 1 is larger, so that within a unit area, the area of the hollow structure 110 located in the display area 2 is larger than the area of the hollow structure 110 located in the peripheral area 1 .
  • the length of the first bar-shaped main body 1111 or the second bar-shaped main body 1121 located in the display area 2 is longer than that of the first bar-shaped main body located in the peripheral area 1
  • the through holes included in the hollow structure 110 in the display area 2 are I-shaped holes, and the through holes included in the hollow structure 110 in the peripheral area 1 are bar-shaped holes, and the shapes of the two are different.
  • the strip-shaped holes are used in the peripheral area 1, so that the peripheral area has more space for arranging peripheral circuits and wiring.
  • Fig. 13 is a schematic diagram of the dimensioning of the strip-shaped hole provided by the embodiment of the present disclosure. Referring to Figure 13, the value range of the length a of the strip hole is 170-600 ⁇ m, the value range of the width c of the strip hole is 4-50 ⁇ m, and the value range of the minimum distance d between adjacent strip holes is 80 ⁇ 200 ⁇ m.
  • the length a of the strip-shaped holes is 400 ⁇ m
  • the width c of the strip-shaped holes is 30 ⁇ m
  • the minimum distance d between adjacent strip-shaped holes is 150 ⁇ m.
  • the length of the first strip-shaped main body 1111 or the second strip-shaped main body 1121 ranges from 250 to 800 ⁇ m;
  • the value range of the length of the trapezoidal part 1112 or the strip-shaped branch part 1122 is 100-250 ⁇ m;
  • the width of the first strip-shaped main part 1111 and the trapezoidal part 1112, or the second strip-shaped main part 1121 and the strip-shaped branch part 1122 ranges from 4 to 50 ⁇ m;
  • the value range of the minimum distance between the adjacent I-shaped holes is 40-100 ⁇ m.
  • the length of the first strip-shaped body part 1111 or the second strip-shaped body part 1121 is 500 ⁇ m;
  • the length of the trapezoidal part 1112 or the strip-shaped branch part 1122 is 180 ⁇ m;
  • the width of the first strip-shaped main body portion 1111 and the trapezoidal portion 1112, or the second strip-shaped main body portion 1121 and the strip-shaped branch portion 1122 is 30 ⁇ m;
  • the minimum distance between adjacent I-shaped holes is 70 ⁇ m.
  • the display area 2 there is also a bridge area 113 and an island area 114 , wiring lines are arranged in the bridge area 113 , and light emitting structures are arranged in the island area 114 .
  • the area of the island region 114 located in the display area 2 is smaller than the area of the island area 114 located in the peripheral area 1, and the width of the bridge area 113 located in the display area 2 is smaller than that of the island area 113 located in the peripheral area 1.
  • the width of the bridge area 113 is smaller than that of the island area 113 located in the peripheral area 1.
  • the bridge area 113 is in the shape of a bar, and the width of the bridge area 113 is the width of the bar.
  • FIG. 14 is a hierarchical schematic diagram of a flexible display substrate provided by an embodiment of the present disclosure.
  • the flexible display substrate includes:
  • the flexible substrate 3, the display function film layer 4 and the cover plate 5 located on the flexible substrate 3 in turn, the projection of the edges of the flexible substrate 3 and the cover plate 5 on the plane where the surface of the display function film layer 4 is located It is located outside the surface of the display function film layer 4 .
  • cover plate 5 can be made of optical glue (Optically Clear Adhesive, OCA), for example: positive photoresist or negative photoresist.
  • OCA Optically Clear Adhesive
  • a heat-affected zone and a dam are provided on the outermost side of the display function film layer of the flexible display substrate to eliminate the heat influence of laser cutting.
  • the projection of the edges of the flexible substrate 3 and the cover plate 5 on the plane where the surface of the display function film layer 4 is located is outside the surface of the display function film layer 4, that is,
  • the flexible substrate 3 and the cover plate 5 are expanded relative to the display function film layer 4, and the expanded flexible substrate 3 and the cover plate 5 replace the original heat-affected area and heat-affected dam, which simplifies Displaying the structural complexity of the functional film layer facilitates the production of the display functional film layer.
  • the outermost structure of the display functional film layer may be a waterproof dam (the structure of the related art has both a waterproof dam and a heat-affected dam).
  • the display function film layer 4 includes: a buffer layer 41, an active layer 42, a gate insulating layer 43, a gate layer 44, a source-drain insulating layer 45, a source-drain layer 46, a first planarization layer 47 .
  • the first planarization layer 47 , the spacer layer 48 , the first cover plate 49 , and the cathode layer 413 are formed with the aforementioned waterproof dam 6 in the peripheral area for waterproofing against oxygen corrosion.
  • the buffer layer 41 may be composed of a plurality of sublayers, for example, in FIG. 13 , it includes a plurality of sublayers, for example, it includes two inorganic sublayers and two organic sublayers. It should be noted that the aforementioned flexible substrate 3 also functions as a buffer, therefore, the flexible substrate 3 and the buffer layer 41 can jointly form a buffer layer (Buffer, BF).
  • the active layer 42 may be a low temperature polysilicon (Low Temperature Poly-Silicon, LTPS) layer.
  • LTPS Low Temperature Poly-Silicon
  • LTPS has high mobility and good stability, which can meet the requirements of high-resolution displays.
  • the gate insulating layer 43 may be an inorganic insulating layer, such as a silicon nitride (chemical formula: SiN) insulating layer, or an organic insulating layer, such as an annular resin insulating layer. Silicon nitride and the annular resin have good insulation properties, ensuring the insulation properties of the gate insulating layer 43 .
  • the source-drain insulating layer 45 may be an inorganic insulating layer, such as a silicon nitride insulating layer, or an organic insulating layer, such as an annular resin insulating layer.
  • the silicon nitride and the ring resin have good insulation properties and ensure the insulation properties of the source-drain insulating layer 45 .
  • the gate layer 44 may be a metal layer or an indium tin oxide layer. Ensure the stability of electrical signal transmission in the gate layer 44 .
  • the source-drain layer 46 may be a metal layer or an indium tin oxide layer. The stability of electrical signal transmission in the source-drain layer 46 is ensured.
  • the first planarization layer 47 and the second planarization layer 414 may be resin layers, and the resin has insulation properties to ensure the insulation properties of the second planarization layer 70 .
  • the spacer layer 48 may be an organic or inorganic insulating spacer layer.
  • the anode layer 410 may be a metal layer.
  • the cathode layer 413 may be an indium tin oxide thin film layer.
  • the pixel defining layer 411 may be a liquid-repellent material layer, such as a fluorine-containing polyimide layer or a fluorine-containing polymethyl methacrylate layer.
  • the light-emitting layer 412 may include a hole transport layer, an organic light-emitting layer, an electron transport layer, etc. that are stacked.
  • the first cover plate 49 and the second cover plate 415 can be encapsulated by thin-film encapsulation (Thin-Film Encapsulation, TFE) to ensure the encapsulation effect.
  • thin-film encapsulation Thin-Film Encapsulation, TFE
  • An embodiment of the present disclosure also provides a display panel, which includes the flexible display substrate as described in any one of FIGS. 1 to 14 .
  • the notch can absorb the shrinkage and deformation requirements during lamination, and the deformation in the corner area can be offset by the notch, thereby improving the problem of wrinkle formation in the lamination at the corner area and improving the effect of lamination.
  • An embodiment of the present disclosure also provides a display device, the display device comprising the above-mentioned display panel.
  • the display device in the embodiments of the present disclosure may be any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like.
  • the notch can absorb the shrinkage and deformation requirements during lamination, and the deformation in the corner area can be offset by the notch, thereby improving the problem of wrinkle formation in the lamination at the corner area and improving the effect of lamination.
  • FIG. 15 is a flowchart of a method for manufacturing a flexible display substrate provided by an embodiment of the present disclosure. As shown in Figure 15, the production method includes:
  • Step S11 providing a flexible substrate.
  • Step S12 forming a display function film layer on the flexible substrate.
  • the display function film layer at least includes light-emitting elements, peripheral circuits and wiring.
  • Step S13 forming hollow structures and gaps on the flexible substrate formed with the display function layer to obtain a flexible display substrate.
  • the flexible display substrate includes a display area and a peripheral area, and the peripheral area is located around the display area.
  • the hollow structure and notch design of the display area and the peripheral area refer to any one of FIGS. 1 to 13 .
  • the notch can absorb the shrinkage and deformation requirements during lamination, and the deformation in the corner area can be offset by the notch, thereby improving the problem of wrinkle formation in the lamination at the corner area and improving the effect of lamination.
  • a patterning process may be used to form hollow structures and notches. Hollow structures and gaps run through the display functional layer and the flexible substrate.
  • the method further includes forming a cover plate.
  • the cover plate covers the display function film layer to protect the display function film layer.
  • the cover plate can be made of optical glue.

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Abstract

本公开提供了一种柔性显示基板、显示面板和显示装置，属于显示装置领域。所述柔性显示基板包括外围区和显示区，所述外围区围绕所述显示区；所述外围区具有多个拐角区域，至少一个所述拐角区域包括两个第一区域和位于所述两个第一区域之间的第二区域；所述第一区域具有镂空结构，所述第二区域具有位于所述柔性显示基板边缘的至少一个缺口。

Description

柔性显示基板、显示面板和显示装置
本公开要求于2022年2月25日提交的申请号为202210179605.6、发明名称为“柔性显示基板、显示面板和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及显示装置领域，特别涉及一种柔性显示基板、显示面板和显示装置。
背景技术
随着显示技术的发展，柔性显示技术不断成熟，除了可弯曲和可折叠的显示基板外，可拉伸的显示基板也逐渐成熟。
可拉伸的柔性显示基板具有镂空结构，镂空结构位于柔性显示基板的外围区，使得柔性显示基板在受到拉伸时，外围区能够产生拉伸形变，例如通过拉伸使外围区贴合到所安装的终端的边框上，实现曲面屏设计。
但对于柔性显示基板四角而言，拉伸过程中柔性显示基板相邻两个边的拉伸量会在拐角处挤压形成褶皱，影响贴合效果。
发明内容
本公开实施例提供了一种柔性显示基板、显示面板和显示装置，能够改善可拉伸显示面板的贴合褶皱问题。所述技术方案如下：
第一方面，本公开实施例提供了一种柔性显示基板，所述柔性显示基板包括外围区和显示区，所述外围区围绕所述显示区；
所述外围区具有多个拐角区域，至少一个所述拐角区域包括两个第一区域和位于所述两个第一区域之间的第二区域；
所述第一区域具有镂空结构，所述第二区域具有位于所述柔性显示基板边缘的至少一个缺口。
可选地，所述缺口为半椭圆缺口、半圆缺口、矩形缺口、梯形缺口或弧形缺口。
可选地，所述缺口的长轴和所述缺口所在边缘相交并且具有一个交点。
其中，对于椭圆、半椭圆等形状，长轴即椭圆、半椭圆的长轴。对于矩形等其他对称图形，长轴可以是长度最大的对称轴。对于非对称图形，长轴可以是经过图形中心且两端点位于图形边缘的最长的线段。
可选地，所述缺口为半椭圆缺口。
可选地，所述半椭圆缺口的长轴的取值范围为200～600μm；
所述半椭圆缺口的短轴的取值范围为40～80μm；
当所述第二区域具有多个所述半椭圆缺口时，相邻的所述半椭圆缺口的最小距离的取值范围为5～40μm。
可选地，所述第二区域包括：
两个第一子区域和一个第二子区域，所述第二子区域位于所述两个第一子区域之间，所述第一子区域和所述第二子区域沿所述柔性显示基板边缘的延伸方向排布，所述缺口位于所述两个第一子区域。
可选地，所述第二子区域位于所述拐角区域的中心。
可选地，所述第二子区域为非镂空区域。
可选地，所述柔性显示基板还包括外围电路；
所述外围电路的至少一部分位于所述第二区域内。
可选地，所述外围电路包括GOA电路，所述GOA电路位于第二子区域内。
可选地，所述镂空结构包括多个工形孔，所述多个工形孔包括第一通孔和第二通孔中的至少一种；
所述第一通孔包括第一条形主体部和两个梯形部，所述两个梯形部分别位于所述第一条形主体部的两端，且所述梯形部的上底与所述第一条形主体部相连；
所述第二通孔包括第二条形主体部和两个条形分支部，所述两个条形分支部分别位于所述第二条形主体部的两端，且所述条形分支部的中部与所述第二条形主体部相连。
可选地，所述第一条形主体部或所述第二条形主体部的长度的取值范围为170～600μm；
所述梯形部或所述条形分支部的长度的取值范围为60～160μm；
所述第一条形主体部和所述梯形部，或所述第二条形主体部和所述条形分支部的宽度的取值范围为4～50μm；
相邻的所述工形孔的最小距离的取值范围为80～200μm。
可选地，相邻的两个所述工形孔的间隙为桥区，相邻的四个所述工形孔围成的间隙为岛区；
所述桥区内布置走线，所述岛区内布置外围电路。
可选地，所述显示区具有镂空结构，单位面积内，位于所述显示区的镂空结构的面积大于位于所述外围区的镂空结构的面积。
可选地，所述显示区的镂空结构包括多个工形孔，所述多个工形孔包括第一通孔和第二通孔中的至少一种；
所述第一通孔包括第一条形主体部和两个梯形部，所述两个梯形部分别位于所述第一条形主体部的两端，且所述梯形部的上底与所述第一条形主体部相连；
所述第二通孔包括第二条形主体部和两个条形分支部，所述两个条形分支部分别位于所述第二条形主体部的两端，且所述条形分支部的中部与所述第二条形主体部相连。
可选地，位于所述显示区的所述第一条形主体部或所述第二条形主体部的长度，大于位于所述述外围区的所述第一条形主体部或所述第二条形主体部的长度。
可选地，在所述显示区内，所述第一条形主体部或所述第二条形主体部的长度的取值范围为250～800μm；
所述梯形部或所述条形分支部的长度的取值范围为100～250μm；
所述第一条形主体部和所述梯形部，或所述第二条形主体部和所述条形分支部的宽度的取值范围为4～50μm；
相邻的所述工形孔的最小距离的取值范围为40～100μm。
可选地，位于所述显示区的工形孔之间具有桥区和岛区；
位于所述显示区的岛区的面积小于位于所述外围区的岛区的面积，位于所述显示区的桥区的宽度小于位于所述外围区的桥区的宽度。
可选地，所述柔性显示基板包括：
柔性基板、依次位于所述柔性基板上的显示功能膜层和盖板，所述柔性基板和所述盖板的边缘在所述显示功能膜层的表面所在平面的投影位于所述显示功能膜层的表面之外。
第二方面，本公开实施例提供了一种显示面板，所述显示面板包括如第一方面任一项所述的柔性显示基板。
第三方面，本公开实施例提供了一种显示装置，所述显示装置包括如第二方面所述的显示面板。
本公开实施例提供的技术方案带来的有益效果至少包括：
通过在柔性显示基板的外围区的拐角区域的中部的第二区域边缘设置缺口，使得柔性显示基板外围区向下拉伸贴合到所安装的终端的边框上时，该缺口能够吸收贴合时的收缩变形需求，在拐角区域的形变量能够被该缺口抵消，从而改善在拐角区域处贴合形成褶皱的问题，提高贴合的效果。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例提供的一种柔性显示基板的区域示意图；
图2是本公开实施例提供的一种柔性显示基板的结构示意图；
图3是本公开实施例提供的拐角区域的应变区域分布示意图；
图4是本公开实施例提供的柔性显示基板拐角区域的受力示意图；
图5是本公开实施例提供的一种外围电路布置示意图；
图6是本公开实施例提供的半椭圆缺口的尺寸标注示意图；
图7是本公开实施例提供的第一通孔的结构示意图；
图8是本公开实施例提供的第二通孔的结构示意图；
图9是本公开实施例提供的镂空结构的尺寸标注示意图；
图10是本申请实施例提供的工形孔的结构示意图；
图11是本公开实施例提供的柔性显示面板的结构示意图；
图12是本公开实施例提供的柔性显示面板的结构示意图；
图13是本公开实施例提供的条形孔的尺寸标注示意图；
图14是本公开实施例提供的一种柔性显示基板的层级示意图；
图15是本公开实施例提供的一种柔性显示基板的制作方法流程图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合附图对本公开实施方式作进一步地详细描述。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开专利申请说明书以及权利要求书中使用的“第一”、“第二”、“第三”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“包括”或者“包含”等类似的词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则所述相对位置关系也可能相应地改变。
图1是本公开实施例提供的一种柔性显示基板的区域示意图。参见图1，所述柔性显示基板包括外围区1和显示区2，所述外围区1围绕所述显示区2。
图2是本公开实施例提供的一种柔性显示基板的部分结构示意图。如图2所示，所述外围区1具有多个拐角区域10(图中仅示出其中一个)，例如，矩形的柔性显示基板具有4个拐角区域。矩形的柔性显示基板可以是直角柔性显示基板，也可以是圆角柔性显示基板，本公开实施例对此不做限定。拐角区域10是包括拐角的区域，例如是以拐角为一角的矩形区域，或者以拐角为圆弧的扇形区域，本公开实施例对拐角区域10的形状也不做限定。
至少一个所述拐角区域10包括两个第一区域11和位于所述两个第一区域11之间的第二区域12；所述第一区域11具有镂空结构110，镂空结构使得柔性显示基板在受到拉伸时，能够产生拉伸形变，便于柔性显示基板的贴合。所述第二区域12具有位于所述柔性显示基板边缘的至少一个缺口120，该缺口用于吸收柔性显示基板的拐角区域压缩形变量，改善压缩变形产生的褶皱。
示例性地，柔性显示基板中每个拐角区域10均按照上述结构设置。
在本公开实施例中，通过在柔性显示基板的外围区的拐角区域的中部的第二区域边缘设置缺口，使得柔性显示基板外围区向下拉伸贴合到所安装的终端 的边框上时，该缺口能够吸收贴合时的收缩变形需求，在拐角区域的形变量能够被该缺口抵消，从而改善在拐角区域处贴合形成褶皱的问题，提高贴合的效果。
另外，这种贴合方式能够使得外围区的贴合深度更深，从而使得显示面板的显示面的显示区占比更大，有利于提高屏占比。
图3是本公开实施例提供的拐角区域的应变区域分布示意图。参见图3，拐角区域的应变区域包括：两个压应变极大区A和两个拉应变极大区B。
如图3所示，拉应变极大区B和压应变极大区A交叠在前述第一区域11，而在第二区域12中，两侧属于压应变极大区A，中部是无受力区。
值得说明的是，柔性显示基板上还具有拉应变极小区C和压应变极小区D，二者通常位于柔性显示基板的显示区。
图4是本公开实施例提供的柔性显示基板拐角区域的受力示意图。参见图4，由于上述应变区域分布，使得第二区域12的两侧受到较大挤压力(如图中箭头所示)，进而导致在这个部位容易产生褶皱。本公开通过在第二区域布置缺口120，使得褶皱被抵消，从而改善贴合效果。
再次参见图2，所述第二区域12包括：
两个第一子区域121和一个第二子区域122，所述第二子区域122位于所述两个第一子区域121之间，所述第一子区域121和所述第二子区域122沿所述柔性显示基板边缘的延伸方向排布，所述缺口120位于所述两个第一子区域121。
示例性地，第二子区域122位于所述拐角区域10的中心。
这里的第二子区域122即前述无受力区，第一子区域121即前述压应变极大区，也即图4中受到较大挤压力的区域。因此，将缺口120设置在第一子区域121能够缓解，甚至是消除褶皱的产生。
由于第二子区域122是无受力区，因此，所述第二子区域122为非镂空区域，也即在第二子区域122既不设置缺口也不设置镂空结构。
由于第二子区域122既不设置缺口也不设置镂空结构，因此可以在第二子区域122中设置电路结构。
图5是本公开实施例提供的一种外围电路布置示意图。参见图5，柔性显示基板还包括外围电路1220，所述外围电路1220的至少一部分位于所述第二区域12内。由于外围区1中设置的镂空结构110和缺口120，导致原本用来设置外围电路的空间被压缩，因此，将外围电路1220的至少部分设置在第二区域12内，可以缓解被压缩的设置外围电路的空间。
示例性地，外围电路1220包括阵列上栅极(Gate of Array，GOA)电路，GOA电路位于第二子区域122。
在图2所示的柔性显示基板中，缺口120为半椭圆缺口。
在其他可能的实现方式中，缺口120可以为其他形状，例如，半圆缺口、矩形缺口、梯形缺口或弧形缺口等。
在图2所示的柔性显示基板中，半椭圆缺口的长轴和所述缺口120所在边缘相交并且具有一个交点，这种半椭圆缺口改善褶皱的效果较好，并且按照半椭圆缺口的长轴和所述缺口120所在边缘相交的方式设置，能够在第一子区域121中布置更多数量的半椭圆缺口，进一步提高改善褶皱的效果。
示例性地，半椭圆缺口的长轴和所述缺口120所在边缘垂直。例如，对于直角矩形的柔性显示基板，则半椭圆缺口的长轴和所述缺口120所在边垂直，对于圆角矩形的柔性显示基板，则半椭圆缺口的长轴和所述缺口120所在边的切线垂直。
当然，在其他实现方式中，也可以是半椭圆缺口的短轴和所述缺口120所在边缘相交，对此不做限制。
图6是本公开实施例提供的半椭圆缺口的尺寸标注示意图。参见图6，所述半椭圆缺口的长轴2a(图6中所示的a为长轴一半)的取值范围为200～600μm，所述半椭圆缺口的短轴b的取值范围为40～80μm，当存在多个缺口时，相邻的所述半椭圆缺口的最小距离c的取值范围为5～40μm。需要说明的是，为了方便观察，图中并未按照比例示出相邻缺口的距离。
值得说明的是，上述相邻的半椭圆缺口通常是指同一个第一子区域121内的相邻半椭圆缺口。
示例性地，所述半椭圆缺口的长轴2a为400μm，所述半椭圆缺口的短轴b为60μm，相邻的所述半椭圆缺口的最小距离c为25μm。
如图2所示，所述镂空结构110包括多个工形孔。下面结合附图对工形孔的结构进行简单说明：
工形孔的结构可以有两种，分别为第一通孔和第二通孔。
图7是本公开实施例提供的第一通孔的结构示意图。参见图7，所述第一通孔111包括第一条形主体部1111和两个梯形部1112，所述两个梯形部1112分别位于所述第一条形主体部1111的两端，且所述梯形部1112的上底与所述第一条形主体部1111相连。
示例性地，梯形部212呈等腰梯形，梯形部212的上底与第一条形主体部211的宽度边重合。
将梯形部212设置为等腰梯形，并且梯形部212的上底与第一条形主体部211的一边重合，使得第一通孔21不仅轴对称，而且还中心对称，方便第一通孔21在柔性显示基板上的整齐排列。
图8是本公开实施例提供的第二通孔的结构示意图。参见图8，所述第二通孔112包括第二条形主体部1121和两个条形分支部1122，所述两个条形分支部1122分别位于所述第二条形主体部1121的两端，且所述条形分支部1122的中部与所述第二条形主体部1121相连。
第二通孔112与第一通孔111的区别在于，通孔端部的形状不同。
如图8所示，条形分支部1122的长度方向与第二条形主体部1121的长度方向垂直，条形分支部1122关于第二条形主体部1121对称。
将条形分支部1122与第二条形主体部1121垂直布置，并且使条形分支部1122关于第二条形主体部1121对称，也是为了使得第二通孔112不仅轴对称，而且还中心对称，方便第二通孔112在柔性显示基板上的整齐排列。
图9是本公开实施例提供的镂空结构的尺寸标注示意图。参见图9，以第二通孔为例进行说明的，所述第二条形主体部1121的长度a的取值范围为170～600μm，所述条形分支部1122的长度b的取值范围为60～160μm，所述第二条形主体部1121和所述条形分支部1122的宽度c的取值范围为4～50μm，相邻的所述工形孔的最小距离d的取值范围为80～200μm。
示例性地，所述第二条形主体部1121的长度a为400μm，所述条形分支部1122的长度b为100μm，所述第二条形主体部1121和所述条形分支部1122的宽度c为30μm，相邻的所述工形孔的最小距离d为150μm。
当镂空结构包括的是第一通孔时，第一通孔的尺寸和前述第二通孔的尺寸相同，也即是：
所述第一条形主体部1111的长度的取值范围为170～600μm，所述梯形部1112的长度(也即梯形部的下底长度)的取值范围为60～160μm，所述第一条形主体部1111和所述梯形部1112的宽度(其中梯形部的宽度也即梯形的高)的取值范围为4～50μm，相邻的所述工形孔的最小距离的取值范围为80～200μm。
图10是本申请实施例提供的工形孔的结构示意图。参见图10，相邻的两个所述工形孔的间隙为桥区113，相邻的四个所述工形孔围成的间隙为岛区114。
如图10所示，多个岛区114阵列分布，相邻的岛区114通过桥区113相连，每个岛区114分别与四个桥区113相连，四个桥区113分别连接于岛区114的不同侧边，且桥区113与岛区114的连接处位于侧边的端部。
在本公开实施例中，所述桥区113内布置走线。
示例性地，桥区仅布置电源线(VDD)和公共电压线(VSS)，GOA走线可以布置在不设置镂空结构的区域。
其中，桥区113的宽度也即相邻的所述工形孔的最小距离d，取值范围为80～200μm。走线的宽度的量级也在几十μm，因而桥区113的宽度能够满足走线要求。
除了在前述第二子区域112中布置外围电路外，所述岛区114内也可以布置外围电路，从而保证外围电路有足够空间进行布置。
这种情况下，桥区可以同时布置VDD、VSS和GOA走线等走线。
按照上述尺寸布置的岛区114尺寸在200μm×200μm左右，而GOA电路的单元尺寸在100μm×150um左右，因而上述岛区设计能够满足GOA电路的布置需求。
图11是本公开实施例提供的柔性显示面板的结构示意图。参见图11，外围区1除了包括拐角区域10之外，还包括位于相邻拐角区域10之间的中部区域13，中部区域13设置有镂空结构110。
中部区域13的镂空结构110和拐角区域10中的镂空结构110可以相同，也可以不同。
例如，中部区域13的镂空结构110和拐角区域10中的镂空结构110都包括工形孔，且包括相同形状和尺寸的工形孔。
再例如，中部区域13的镂空结构110和拐角区域10中的镂空结构110包括的通孔的形状不同，或者形状相同但尺寸不同，在此不再赘述。
值得说明的是，在外围区中，镂空结构110除了可以由前述工形孔构成外，还可以由条形孔构成，或者由工形孔和条形孔共同构成。
在本公开实施例中，外围区中可以包括多圈工形孔，例如5圈，本公开实施例对此不做限制。在这多圈工形孔中，相邻两圈中工形孔的排列方向不同，例如方向是相互垂直的。
再次参见图11，所述显示区2具有镂空结构110，单位面积内，位于所述显示区2的镂空结构110的面积大于位于所述外围区1的镂空结构110的面积。
镂空结构110的面积是指柔性显示基板处在展平，且未发生形变的状态下，镂空结构110的内壁在柔性显示基板表面围成的区域的面积。
也即位于外围区1的镂空结构的面积更小，这样，能够使得外围区有更多的空间布置外围电路和走线，例如图11中，在外围区1的镂空结构间隙内布置走线m和外围电路n；四角可以设计更大的曲率，增加贴合深度，从而达到将外围区隐藏到侧面，实现全面屏显示的效果。
当然，如图11所示，在显示区1的边缘的镂空结构间隙内同样可以布置走线m，这里不做赘述。
在本公开实施例中，所述显示区2的镂空结构110包括多个工形孔，所述多个工形孔包括第一通孔111和第二通孔112中的一种。
所述第一通孔111包括第一条形主体部1111和两个梯形部1112，所述两个梯形部1112分别位于所述第一条形主体部1111的两端，且所述梯形部1112的上底与所述第一条形主体部1111相连；
所述第二通孔112包括第二条形主体部1121和两个条形分支部1122，所述两个条形分支部1122分别位于所述第二条形主体部1121的两端，且所述条形分支部1122的中部与所述第二条形主体部1121相连。
在本公开实施例中，显示区2的镂空结构110和外围区1中的镂空结构可以相同，也可以不同。
例如，显示区2的镂空结构110和拐角区域10或中部区域13中的镂空结构110都包括工形孔，且包括相同形状和尺寸的工形孔。
再例如，显示区2的镂空结构110和拐角区域10及中部区域13的镂空结构110包括的通孔的形状不同，或者形状相同但尺寸不同。
参见图11，显示区2和外围区1的镂空结构110包括的通孔均为工形孔，但两个区域包括的工形孔的尺寸不同，例如，显示区2中工形孔的条形分支部更长，外围区1中相邻工形孔的间隔更大，这样使得单位面积内，位于所述显示区2的镂空结构110的面积大于位于所述外围区1的镂空结构110的面积。
也即是说，位于所述显示区2的所述第一条形主体部1111或所述第二条形主体部1121的长度，大于位于所述述外围区1的所述第一条形主体部1111或所述第二条形主体部1121的长度。
参见图12，显示区2的镂空结构110包括的通孔为工形孔，外围区1的镂空结构110包括的通孔为条形孔，二者的形状不同。
在外围区1中使用条形孔，使得外围区有更多的空间布置外围电路和走线。
图13是本公开实施例提供的条形孔的尺寸标注示意图。参见图13，条形孔的长度a的取值范围为170～600μm，条形孔的宽度c的取值范围为4～50μm，相邻的条形孔的最小距离d的取值范围为80～200μm。
示例性地，条形孔的长度a为400μm，条形孔的宽度c为30μm，相邻的条形孔的最小距离d为150μm。
在显示区2中，所述第一条形主体部1111或所述第二条形主体部1121的长度的取值范围为250～800μm；
所述梯形部1112或所述条形分支部1122的长度的取值范围为100～250μm；
所述第一条形主体部1111和所述梯形部1112，或所述第二条形主体部1121和所述条形分支部1122的宽度的取值范围为4～50μm；
相邻的所述工形孔的最小距离的取值范围为40～100μm。
示例性地，所述第一条形主体部1111或所述第二条形主体部1121的长度为500μm；
所述梯形部1112或所述条形分支部1122的长度为180μm；
所述第一条形主体部1111和所述梯形部1112，或所述第二条形主体部1121和所述条形分支部1122的宽度为30μm；
相邻的所述工形孔的最小距离为70μm。
再次参见图11，在显示区2，同样具有桥区113和岛区114，所述桥区113内布置走线，岛区114内布置发光结构。
示例性地，位于所述显示区2的岛区114的面积小于位于所述外围区1的岛区114的面积，位于所述显示区2的桥区113的宽度小于位于所述外围区1的桥区113的宽度。
其中，桥区113为条形，桥区113宽度为条形的宽度。
图14是本公开实施例提供的一种柔性显示基板的层级示意图。参见图14，所述柔性显示基板包括：
柔性基板3、依次位于所述柔性基板3上的显示功能膜层4和盖板5，所述柔性基板3和所述盖板5的边缘在所述显示功能膜层4的表面所在平面的投影位于所述显示功能膜层4的表面之外。
其中，盖板5可以采用光学胶(Optically Clear Adhesive，OCA)制成，例 如：正性光刻胶或负性光刻胶。
在相关技术中，柔性显示基板的显示功能膜层的最外侧设置有热影响区域及堤坝，消除激光切割的热影响。而在本公开实施例中，所述柔性基板3和所述盖板5的边缘在所述显示功能膜层4的表面所在平面的投影位于所述显示功能膜层4的表面之外，也即是所述柔性基板3和所述盖板5相对于显示功能膜层4外扩，通过外扩的所述柔性基板3和所述盖板5替代原来的热影响区域及热影响堤坝，简化了显示功能膜层的结构复杂度，便于显示功能膜层的制作。在不设置热影响区域及热影响堤坝的情况下，显示功能膜层的最外侧的结构可以是防水堤坝(相关技术的结构同时具有防水堤坝和热影响堤坝)。
再次参见图14，显示功能膜层4包括：缓冲层41、有源层42、栅极绝缘层43、栅极层44、源漏极绝缘层45、源漏极层46、第一平坦化层47、隔垫物层48、第一封装层49、阳极层410、像素界定层411、发光层412、阴极层413、第二平坦化层414和第二盖板415。
其中，第一平坦化层47、隔垫物层48、第一盖板49、阴极层413在外围区形成有前述防水堤坝6，用于防水氧腐蚀。
示例性地，缓冲层41可以由多个子层构成，例如图13中即包括多个子层，例如包括两个无机子层和两个有机子层等。值得说明的是，前述柔性基板3同样起到缓冲作用，因此，柔性基板3和缓冲层41可以共同形成缓冲层(Buffer，BF)。
示例性地，有源层42可以为低温多晶硅(Low Temperature Poly-Silicon，LTPS)层。LTPS的迁移率高，稳定性好，可以满足高分辨率显示器的要求。
示例性地，栅极绝缘层43可以为无机绝缘层，例如氮化硅(化学式：SiN)绝缘层，也可以为有机绝缘层，例如环形树脂绝缘层。氮化硅和环形树脂的绝缘性好，保证栅极绝缘层43的绝缘性。
示例性地，源漏极绝缘层45可以为无机绝缘层，例如氮化硅绝缘层，也可以为有机绝缘层，例如环形树脂绝缘层。氮化硅和环形树脂的绝缘性好，保证源漏极绝缘层45的绝缘性。
示例性地，栅极层44可以为金属层或氧化铟锡层。保证栅极层44电信号传输的稳定性。
示例性地，源漏极层46可以为金属层或氧化铟锡层。保证源漏极层46电信号传输的稳定性。
示例性地，第一平坦化层47和第二平坦化层414可以为树脂层，树脂具有绝缘性，保证第二平坦化层70的绝缘性。
示例性地，隔垫物层48可以为有机或无机绝缘隔垫物层。
示例性地，阳极层410可以为金属层。阴极层413可以为氧化铟锡薄膜层。
示例性地，像素界定层411可以为疏液材料层，例如含氟聚酰亚胺或含氟聚甲基丙烯酸甲酯层。
示例性地，发光层412可以包括层叠设置的空穴传输层、有机发光层和电子传输层等。
示例性地，第一盖板49和第二盖板415可以采用薄膜封装(Thin-Film Encapsulation，TFE)的方法进行封装，保证封装效果。
本公开实施例还提供了一种显示面板，所述显示面板包括如图1至图14任一幅所述的柔性显示基板。
在本公开实施例中，通过在柔性显示基板的外围区的拐角区域的中部的第二区域边缘设置缺口，使得柔性显示基板外围区向下拉伸贴合到所安装的终端的边框上时，该缺口能够吸收贴合时的收缩变形需求，在拐角区域的形变量能够被该缺口抵消，从而改善在拐角区域处贴合形成褶皱的问题，提高贴合的效果。
本公开实施例还提供了一种显示装置，所述显示装置包括如前所述的显示面板。
本公开实施例中的显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在本公开实施例中，通过在柔性显示基板的外围区的拐角区域的中部的第二区域边缘设置缺口，使得柔性显示基板外围区向下拉伸贴合到所安装的终端的边框上时，该缺口能够吸收贴合时的收缩变形需求，在拐角区域的形变量能够被该缺口抵消，从而改善在拐角区域处贴合形成褶皱的问题，提高贴合的效果。
图15是本公开实施例提供的一种柔性显示基板的制作方法流程图。如图15所示，该制作方法包括：
步骤S11：提供一柔性基板。
步骤S12：在柔性基板上形成显示功能膜层。
显示功能膜层至少包括发光元件、外围电路和走线。
步骤S13：在形成有显示功能层的柔性基板上形成镂空结构和缺口，得到柔性显示基板。
其中，柔性显示基板包括显示区和外围区，外围区位于显示区周围，显示区和外围区的镂空结构及缺口设计，参见图1至图13任一幅。
在本公开实施例中，通过在柔性显示基板的外围区的拐角区域的中部的第二区域边缘设置缺口，使得柔性显示基板外围区向下拉伸贴合到所安装的终端的边框上时，该缺口能够吸收贴合时的收缩变形需求，在拐角区域的形变量能够被该缺口抵消，从而改善在拐角区域处贴合形成褶皱的问题，提高贴合的效果。
示例性地，可以采用构图工艺形成镂空结构和缺口。镂空结构和缺口贯穿显示功能层和柔性基板。
可选地，在步骤S13之前，该方法还包括，形成盖板。
盖板覆盖显示功能膜层，以对显示功能膜层提供保护。示例性地，盖板为可以采用光学胶制成。
以上所述仅为本公开的可选实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (21)

  1. 一种柔性显示基板，其特征在于，所述柔性显示基板包括外围区(1)和显示区(2)，所述外围区(1)围绕所述显示区(2)；
    所述外围区(1)具有多个拐角区域(10)，至少一个所述拐角区域(10)包括两个第一区域(11)和位于所述两个第一区域(11)之间的第二区域(12)；
    所述第一区域(11)具有镂空结构(110)，所述第二区域(12)具有位于所述柔性显示基板边缘的至少一个缺口(120)。
  2. 根据权利要求1所述的柔性显示基板，其特征在于，所述缺口(120)为半椭圆缺口、半圆缺口、矩形缺口、梯形缺口或弧形缺口。
  3. 根据权利要求2所述的柔性显示基板，其特征在于，所述缺口的长轴和所述缺口(120)所在边缘相交并且具有一个交点。
  4. 根据权利要求3所述的柔性显示基板，其特征在于，所述缺口(120)为半椭圆缺口。
  5. 根据权利要求4所述的柔性显示基板，其特征在于，所述半椭圆缺口的长轴的取值范围为200～600μm；
    所述半椭圆缺口的短轴的取值范围为40～80μm；
    当所述第二区域(12)具有多个所述半椭圆缺口时，相邻的所述半椭圆缺口的最小距离的取值范围为5～40μm。
  6. 根据权利要求1至5任一项所述的柔性显示基板，其特征在于，所述第二区域(12)包括：
    两个第一子区域(121)和一个第二子区域(122)，所述第二子区域(122)位于所述两个第一子区域(121)之间，所述第一子区域(121)和所述第二子区域(122)沿所述柔性显示基板边缘的延伸方向排布，所述缺口(120)位于所述两个第一子区域(121)。
  7. 根据权利要求6所述的柔性显示基板，其特征在于，所述第二子区域(122)位于所述拐角区域(10)的中心。
  8. 根据权利要求6所述的柔性显示基板，其特征在于，所述第二子区域(122)为非镂空区域。
  9. 根据权利要求8所述的柔性显示基板，其特征在于，所述柔性显示基板还 包括外围电路(1220)；
    所述外围电路(1220)的至少一部分位于所述第二区域(12)内。
  10. 根据权利要求9所述的柔性显示基板，其特征在于，所述外围电路(1220)包括GOA电路，所述GOA电路位于第二子区域(122)内。
  11. 根据权利要求1至5、7至10中任一项所述的柔性显示基板，其特征在于，所述镂空结构(110)包括多个工形孔，所述多个工形孔包括第一通孔(111)和第二通孔(112)中的至少一种；
    所述第一通孔(111)包括第一条形主体部(1111)和两个梯形部(1112)，所述两个梯形部(1112)分别位于所述第一条形主体部(1111)的两端，且所述梯形部(1112)的上底与所述第一条形主体部(1111)相连；
    所述第二通孔(112)包括第二条形主体部(1121)和两个条形分支部(1122)，所述两个条形分支部(1122)分别位于所述第二条形主体部(1121)的两端，且所述条形分支部(1122)的中部与所述第二条形主体部(1121)相连。
  12. 根据权利要求11所述的柔性显示基板，其特征在于，
    所述第一条形主体部(1111)或所述第二条形主体部(1121)的长度的取值范围为170～600μm；
    所述梯形部(1112)或所述条形分支部(1122)的长度的取值范围为60～160μm；
    所述第一条形主体部(1111)和所述梯形部(1112)，或所述第二条形主体部(1121)和所述条形分支部(1122)的宽度的取值范围为4～50μm；
    相邻的所述工形孔的最小距离的取值范围为80～200μm。
  13. 根据权利要求11所述的柔性显示基板，其特征在于，相邻的两个所述工形孔的间隙为桥区(113)，相邻的四个所述工形孔围成的间隙为岛区(114)；
    所述桥区(113)内布置走线，所述岛区(114)内布置外围电路。
  14. 根据权利要求1至5、7至10、12至13中任一项所述的柔性显示基板，其特征在于，所述显示区(2)具有镂空结构(110)，单位面积内，位于所述显示区(2)的镂空结构(110)的面积大于位于所述外围区(1)的镂空结构(110)的面积。
  15. 根据权利要求14所述的柔性显示基板，其特征在于，所述显示区(2)的镂空结构(110)包括多个工形孔，所述多个工形孔包括第一通孔(111)和第 二通孔(112)中的至少一种；
    所述第一通孔(111)包括第一条形主体部(1111)和两个梯形部(1112)，所述两个梯形部(1112)分别位于所述第一条形主体部(1111)的两端，且所述梯形部(1112)的上底与所述第一条形主体部(1111)相连；
    所述第二通孔(112)包括第二条形主体部(1121)和两个条形分支部(1122)，所述两个条形分支部(1122)分别位于所述第二条形主体部(1121)的两端，且所述条形分支部(1122)的中部与所述第二条形主体部(1121)相连。
  16. 根据权利要求15所述的柔性显示基板，其特征在于，位于所述显示区(2)的所述第一条形主体部(1111)或所述第二条形主体部(1121)的长度，大于位于所述述外围区(1)的所述第一条形主体部(1111)或所述第二条形主体部(1121)的长度。
  17. 根据权利要求16所述的柔性显示基板，其特征在于，
    在所述显示区(2)内，所述第一条形主体部(1111)或所述第二条形主体部(1121)的长度的取值范围为250～800μm；
    所述梯形部(1112)或所述条形分支部(1122)的长度的取值范围为100～250μm；
    所述第一条形主体部(1111)和所述梯形部(1112)，或所述第二条形主体部(1121)和所述条形分支部(1122)的宽度的取值范围为4～50μm；
    相邻的所述工形孔的最小距离的取值范围为40～100μm。
  18. 根据权利要求15所述的柔性显示基板，其特征在于，位于所述显示区(2)的工形孔之间具有桥区(113)和岛区(114)；
    位于所述显示区(2)的岛区(114)的面积小于位于所述外围区(1)的岛区(114)的面积，位于所述显示区(2)的桥区(113)的宽度小于位于所述外围区(1)的桥区(113)的宽度。
  19. 根据权利要求1至5、7至10、12至13、15至18中任一项所述的柔性显示基板，其特征在于，所述柔性显示基板包括：
    柔性基板(3)、依次位于所述柔性基板(3)上的显示功能膜层(4)和盖板(5)，所述柔性基板(3)和所述盖板(5)的边缘在所述显示功能膜层(4)的表面所在平面的投影位于所述显示功能膜层(4)的表面之外。
  20. 一种显示面板，其特征在于，所述显示面板包括如权利要求1至19任一项所述的柔性显示基板。
  21. 一种显示装置，其特征在于，所述显示装置包括如权利要求20所述的显示面板。
PCT/CN2023/070264 2022-02-25 2023-01-04 柔性显示基板、显示面板和显示装置 WO2023160259A1 (zh)

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CN107863000A (zh) * 2017-11-30 2018-03-30 武汉天马微电子有限公司 柔性显示面板及柔性显示装置
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