WO2023005250A1 - 折叠显示面板及折叠显示面板的制备方法 - Google Patents

折叠显示面板及折叠显示面板的制备方法 Download PDF

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Publication number
WO2023005250A1
WO2023005250A1 PCT/CN2022/084690 CN2022084690W WO2023005250A1 WO 2023005250 A1 WO2023005250 A1 WO 2023005250A1 CN 2022084690 W CN2022084690 W CN 2022084690W WO 2023005250 A1 WO2023005250 A1 WO 2023005250A1
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WIPO (PCT)
Prior art keywords
layer
display panel
bending area
pixel
area
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PCT/CN2022/084690
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English (en)
French (fr)
Inventor
米磊
刘雨生
李洪瑞
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合肥维信诺科技有限公司
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Application filed by 合肥维信诺科技有限公司 filed Critical 合肥维信诺科技有限公司
Publication of WO2023005250A1 publication Critical patent/WO2023005250A1/zh
Priority to US18/342,034 priority Critical patent/US20230333590A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G06F1/1652—Details related to the display arrangement, including those related to the mounting of the display in the housing the display being flexible, e.g. mimicking a sheet of paper, or rollable
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H04M1/0216—Foldable in one direction, i.e. using a one degree of freedom hinge
    • 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
    • H10K59/1201—Manufacture or treatment
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133305—Flexible substrates, e.g. plastics, organic film
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/0206—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings
    • H04M1/0208—Portable telephones comprising a plurality of mechanically joined movable body parts, e.g. hinged housings characterized by the relative motions of the body parts
    • H04M1/0214—Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H04M1/026—Details of the structure or mounting of specific components
    • H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
    • H04M1/0268—Details of the structure or mounting of specific components for a display module assembly including a flexible display panel

Definitions

  • the present application relates to the technical field of display devices, and in particular to a display panel, a display device, and a method for preparing a display panel.
  • Embodiments of the present application provide a foldable display panel and a manufacturing method of the foldable display panel, aiming at improving the service life of the foldable display panel.
  • the embodiment of the first aspect of the present application provides a foldable display panel.
  • the foldable display panel has a bending area and non-bending areas located on both sides of the bending area in the width direction of the foldable display panel.
  • the foldable display panel includes: The group includes the first pixel group located in the bending area and the second pixel group located in the non-bending area; the driving circuit is located in the non-bending area and is used to drive the pixel group, and the driving circuit includes a second pixel group used to drive the first pixel group A driving circuit and a second driving circuit for driving the second pixel group.
  • the driving device layer is located on the substrate, and the driving circuit is arranged on the driving device layer;
  • the first electrode layer is located on the side of the driving device layer away from the substrate, and the first electrode layer includes a first electrode located in the bending area and a second electrode located in the non-bending area;
  • the connecting line layer is located between the first electrode layer and the driving device layer, the connecting line layer includes first connecting lines, and each first driving circuit is connected to each first electrode through the first connecting lines.
  • the foldable display panel further includes a controller, configured to respectively control the first driving circuit and the second driving circuit to operate independently of each other.
  • the folding display panel further includes:
  • the first planarization layer is located between the driving device layer and the connection line layer;
  • the driving device layer includes a first through hole located in the bending area, and at least part of the first planarization layer is filled in the first through hole.
  • the foldable display panel further includes: a first inorganic insulating layer, the first inorganic insulating layer is located on the side of the driving device layer facing the substrate, and the first inorganic insulating layer includes The second through hole is connected to the first through hole, and at least part of the first planarization layer is filled in the second through hole.
  • the bending area includes a first bending area and a second bending area arranged side by side along the width direction, and the non-bending area includes a first bending area adjacent to the first bending area. a non-inflection zone and a second non-inflection zone adjacent to the second inflection zone;
  • the first pixel group includes a first sub-pixel located in the first bending area and a second sub-pixel located in the second bending area;
  • the first drive circuit includes a first sub-circuit for driving the first sub-pixel and a second sub-circuit for driving the second sub-pixel, the first sub-circuit is located in the first non-bending region, and the second sub-circuit is located in the second non-bending zone.
  • the extension size of the first bending area and/or the second bending area is half of the extension size of the bending area.
  • the plurality of first sub-circuits are evenly distributed in the first non-bending area; and/or, the plurality of second sub-circuits are evenly distributed in the second non-bending area.
  • the first non-bending region includes a first transition region adjacent to the first bending region, and a first transition region located on the side of the first transition region away from the first bending region.
  • a main display area, the first sub-circuit is located in the first transition area.
  • the second pixel group includes a first transition sub-pixel located in the first transition region
  • the second driving circuit includes a first transition circuit for driving the first transition sub-pixel
  • the first The transition circuit is located in the first transition region.
  • the second pixel group includes a first main sub-pixel located in the first main display area
  • the second driving circuit includes a first main circuit for driving the first main sub-pixel
  • the first main sub-pixel The circuit is located in the first main display area.
  • the second non-bending region includes a second transition region adjacent to the second bending region, and a first transition region located on the side of the second transition region away from the second bending region.
  • Two main display areas, the second sub-circuit is located in the second transition area.
  • the second pixel group includes a second transition sub-pixel located in the second transition region
  • the second driving circuit includes a second transition circuit for driving the second transition sub-pixel
  • the second The transition circuit is located in the second transition region.
  • the second pixel group includes a second main sub-pixel located in the second main display area
  • the second driving circuit includes a second main circuit for driving the second main sub-pixel
  • the second main sub-pixel The circuit is located in the second main display area.
  • the driving circuit and the pixel group it drives are distributed along the width direction in a misaligned manner
  • the connecting wire layer further includes second connecting wires, and each second connecting wire is used for connecting each second electrode and each second driving circuit.
  • the driving circuit there is a first distance between the driving circuit and the pixel group it drives, and the value of the first distance gradually increases in the direction from the bending area to the adjacent non-bending area. decrease.
  • the first driving circuit and the second driving circuit are evenly distributed in the non-bending region.
  • the distance between the driving circuit and the pixel group it drives is half of the bending area.
  • a non-display area is provided on a side of each non-bending area away from the bending area, and at least part of the driving circuits are located in the non-display area.
  • the non-bending area includes a frame display area adjacent to the non-display area, and a driving circuit for driving a pixel group in the frame display area is located in the non-display area.
  • the extension width of the frame display area is half of the extension width of the bending area.
  • the embodiment of the second aspect of the present application further provides a display device, including the display panel of any one of the above-mentioned embodiments of the first aspect.
  • the embodiment of the third aspect of the present application also provides a method for preparing a foldable display panel.
  • the foldable display panel includes a bending area and non-bending areas located on both sides of the bending area.
  • the preparation method includes:
  • the driving device layer includes a first through hole located in the bending area and a driving circuit located in the non-bending area, so that part of the first inorganic insulating layer is exposed through the first through hole;
  • part of the first planarization layer is filled in the first through hole and the second through hole;
  • connection line layer is prepared on the first planarization layer, the connection line layer includes a first connection line, and the first connection line is connected to a part of the driving circuit.
  • the foldable display panel includes a bending area and a non-bending area, and the folding display panel is folded and unfolded by bending the bending area.
  • the foldable display panel includes a pixel group and a driving circuit.
  • the pixel group includes a first pixel group and a second pixel group.
  • the first pixel group is used to realize the display of the bending area
  • the second pixel group is used to realize the display of the non-bending area.
  • the first driving circuit and the second driving circuit of the driving circuit respectively drive the first pixel group and the second pixel group to display. Both the first driving circuit and the second driving circuit are located in the non-bending area, and no driving circuit is provided in the bending area, which can improve the problem of easy breakage of metal wires in the bending area, thereby effectively improving the service life of the display panel.
  • Fig. 1 is a schematic structural view of a foldable display panel provided in the embodiment of the first aspect of the application in a flattened state;
  • Fig. 2 is a schematic structural diagram of a foldable display panel in a folded state provided by an embodiment of the first aspect of the present application;
  • Fig. 3 is a schematic diagram of a partially enlarged structure at P in Fig. 1;
  • Fig. 4 is a schematic diagram of the layer structure of a foldable display panel provided by the embodiment of the first aspect of the present application;
  • Fig. 5 is a schematic diagram of the layer structure of the bending area of a foldable display panel provided by the embodiment of the first aspect of the present application;
  • Fig. 6 is a schematic diagram of the layer structure of the non-bending area of a foldable display panel provided by the embodiment of the first aspect of the present application;
  • Fig. 7 is a schematic structural diagram of a foldable display panel in a flattened state provided by another embodiment of the first aspect of the present application.
  • Fig. 8 is a schematic structural view of a foldable display panel in a flattened state provided by yet another embodiment of the first aspect of the present application;
  • Fig. 9 is a schematic diagram of a partial enlarged structure in another embodiment where P is in Fig. 1;
  • Fig. 10 is a schematic structural view of a foldable display panel in a flattened state according to yet another embodiment of the first aspect of the present application;
  • Fig. 11 is a schematic flowchart of a method for manufacturing a foldable display panel provided in the embodiment of the third aspect of the present application.
  • Fig. 12 is a schematic flowchart of a method for manufacturing a foldable display panel provided by another embodiment of the third aspect of the present application.
  • the foldable display panel, the display device and the manufacturing method of the foldable display panel according to the embodiments of the present application will be described in detail below with reference to FIG. 1 to FIG. 12 .
  • Fig. 1 is a schematic structural view of a foldable display panel 10 in a flattened state provided by the embodiment of the first aspect of the application; A schematic structural view of the foldable display panel 10 in a folded state.
  • the foldable display panel 10 has a bending area TA and non-bending areas PA located on both sides of the bending area TA in the width direction of the foldable display panel 10 (direction X in FIG. 1 ). As shown in FIG. 2 , the foldable display panel 10 realizes transition between a flattened state and a folded state by bending at the bending area TA.
  • FIG. 3 is a schematic diagram of a partially enlarged structure at P in FIG. 1 .
  • the foldable display panel 10 includes: a pixel group 100, including a first pixel group 110 located in the bending area TA and a second pixel group 120 located in the non-bending area PA; a driving circuit 200 located in The non-bending area PA is also used for driving the pixel group 100 , and the driving circuit 200 includes a first driving circuit 210 for driving the first pixel group 110 and a second driving circuit 220 for driving the second pixel group 120 .
  • the folding display panel 10 includes a pixel group 100 and a driving circuit 200
  • the pixel group 100 includes a first pixel group 110 and a second pixel group 120
  • the first pixel group 110 is used to realize
  • the second pixel group 120 is used to realize the display of the non-bending area PA.
  • the first driving circuit 210 and the second driving circuit 220 of the driving circuit 200 respectively drive the first pixel group 110 and the second pixel group 120 to display.
  • Both the first driving circuit 210 and the second driving circuit 220 are located in the non-bending area PA, and the driving circuit 200 is not provided in the bending area TA, which can improve the problem that the metal wires in the bending area TA are easily broken, thereby effectively improving the display panel. service life.
  • the driving circuit 200 is generally composed of stacked patterned metal layers, and an inorganic insulating layer is usually disposed between the stacked metal layers.
  • the inorganic insulating layer has the problem that it is not resistant to bending and is prone to breakage.
  • the inorganic insulating layer of the bending area TA may also be removed to improve the flexibility of the bending area TA. Since there is no driving circuit 200 in the bending area TA, there is still a space in the bending area TA filled with an organic film layer to further improve the bending resistance of the bending area TA and improve the service life of the foldable display panel 10.
  • FIG. 3 only schematically shows individual first pixel groups 110 and their correspondingly connected first driving circuits 210 , and second pixel groups 120 and their corresponding second driving circuits 220 .
  • the first pixel groups 110 and the first driving circuits 210 are provided in one-to-one correspondence, and each first driving circuit 210 respectively drives each first pixel group 110; or the first driving circuit 210 and the first pixel group 110 form a pair
  • the same first driving circuit 210 is used to drive more than two first pixel groups 110 with the same color.
  • the second pixel group 120 and the second driving circuit 220 are provided in one-to-one correspondence, and each second driving circuit 220 drives each second pixel group 120 respectively; or the second driving circuit 220 and the second pixel group 120 form a pair In multiple configurations, the same second driving circuit 220 is used to drive more than two second pixel groups 120 with the same color.
  • the first pixel group 110 and the second pixel group 120 both include red sub-pixels, green sub-pixels and blue sub-pixels.
  • the first pixel group 110 and the second pixel group 120 may also include yellow sub-pixels and the like.
  • FIG. 4 is a schematic layer structure diagram of a foldable display panel 10 provided by the embodiment of the first aspect of the present application.
  • the layer structure of the foldable display panel 10 includes: a substrate 11; a driving device layer 12 located on the substrate 11, and a driving circuit 200 disposed on the driving device layer 12; a first electrode layer 13 located on the driving device layer 12; On the side of the device layer 12 away from the substrate 11, the first electrode layer 13 includes a first electrode 500 located in the bending area TA and a second electrode (not shown) located in the non-bending area PA; the connecting line layer 14 , located between the first electrode layer 13 and the driving device layer 12 , the connecting wire layer 14 includes a first connecting wire 300 , and each first driving circuit 210 is connected to each first electrode 500 through the first connecting wire 300 .
  • connection between the first electrode 500 located in the bending area TA and the first driving circuit 210 located in the non-bending area PA can be realized by adding the connecting line layer 14 .
  • the connecting line layer 14 is a metal wiring layer, which can ensure that the bending area TA has good bending resistance.
  • the foldable display panel 10 further includes: a first inorganic insulating layer 16 located on a side of the driving device layer 12 facing the substrate 11 .
  • the driving circuit 200 includes a transistor T and a storage capacitor C.
  • the transistor T includes a semiconductor b, a gate g, a source s and a drain d.
  • the storage capacitor C includes a first plate c1 and a second plate c2.
  • the gate g and the first plate c1 may be located on the first conductive layer 12b
  • the second plate c2 may be located on the second conductive layer 12c
  • the source s and drain d may be located on the third conductive layer 12d.
  • the driving device layer 12 may also include a data signal line (Data line), a power signal line (Vdd line), a reference voltage signal line (Vref line), a scanning signal line (Scan line) and an emission control signal line (Emit at least one of line).
  • Data line data signal line
  • Vdd line power signal line
  • Vref line reference voltage signal line
  • Scan line scanning signal line
  • Emit at least one of line an emission control signal line
  • the foldable display panel 10 further includes a controller (not shown in the figure), and the controller is used to control the bending area TA and the non-bending area PA to be displayed independently of each other.
  • the controller is used to respectively control the first driving circuit 210 and the second driving circuit 220 to operate independently of each other. Since the layer structures of the bending area TA and the non-bending area PA are different, the overall display effect of the foldable display panel 10 can be improved by controlling the bending area TA and the non-bending area PA to be independently displayed by the controller.
  • the foldable display panel 10 adopts a dual-gamma system, and the controller independently controls the data signal lines of the bending area TA and the non-bending area PA.
  • the second inorganic insulating layer 17 is one or more layers.
  • the second inorganic insulating layer 17 includes a first layer 17a, a second layer 17b and a third layer 17c, and the first layer 17a is located between Between the source layer 12a and the first conductive layer 12b, the second layer 17b is located between the first conductive layer 12b and the second conductive layer 12c, and the third layer 17c is located between the second conductive layer 12c and the third conductive layer 12d between.
  • the driving circuit 200 is not provided in the bending area TA, the first conductive layer 12b, the second conductive layer 12c and the third conductive layer 12d in the bending area TA can be subjected to hole digging.
  • the first conductive layer 12b, the second conductive layer 12c and the third conductive layer 12d in the bending area TA do not need to be insulated from each other, so the second inorganic insulating layer 17 can also be dug in the bending area TA.
  • the first through hole in the driving device layer 12 is formed by digging the holes on the first conductive layer 12b, the second conductive layer 12c and the third conductive layer 12d and the second inorganic insulating layer 17, that is, the driving device layer 12 includes The first through hole located in the bending area TA.
  • the foldable display panel 10 further includes: a first planarization layer 15, located between the driving device layer 12 and the connection line layer 14, when the driving device layer 12 has a first through hole, at least Part of the first planarization layer 15 is filled in the first through hole.
  • a first planarization layer 15 located between the driving device layer 12 and the connection line layer 14, when the driving device layer 12 has a first through hole, at least Part of the first planarization layer 15 is filled in the first through hole.
  • the first inorganic insulating layer 16 includes a second through hole located in the bending area TA, the second through hole communicates with the first through hole, and at least part of the first through hole The planarization layer 15 is filled in the second through hole.
  • the first inorganic insulating layer 16 is dug, and the second through hole is formed on the first inorganic insulating layer 16, reducing the bending area TA of the second inorganic insulating layer.
  • the distribution area of 17 can further improve the bending resistance of the bending area TA.
  • the first inorganic insulating layer 16 includes, for example, a silicon oxide layer and/or a silicon nitride layer
  • the second inorganic insulating layer 17 includes, for example, a silicon oxide layer and/or a silicon nitride layer.
  • the foldable display panel 10 further includes: a second planarization layer 18 located between the connection line layer 14 and the first electrode layer 13; a pixel definition layer 19 located on the side of the first electrode layer 13 away from the connection line layer 14 side.
  • the pixel definition layer 19 includes a main body and a pixel opening, and each first electrode 500 and second electrode are arranged corresponding to each pixel opening, and the pixel opening is used to fill the light-emitting material to realize the light-emitting display of the foldable display panel 10 .
  • Fig. 5 is a schematic diagram of the layer structure of the bending area TA of a foldable display panel 10 provided by the embodiment of the first aspect of the present application.
  • Fig. 6 is a schematic diagram of the layer structure provided by the embodiment of the first aspect of the present application.
  • the bending area TA includes a substrate 11, a first planarization layer 15, a connection line layer 14, a second planarization layer 18, a first electrode layer 13 and pixel definition layer 19 and so on.
  • the number of layer structures in the bending area TA is small, and the bending resistance is better.
  • the non-bending display area includes a substrate 11, a first inorganic insulating layer 16, an active layer 12a, a first layer 17a, a first wiring layer 12b, a second layer 17b, a second wiring layer 12c, a third layer 17c, the third metal layer 12d, the first planarization layer 15, the connecting line layer 14, the second planarization layer 18, the first electrode layer 13, the pixel definition layer 19, and the like.
  • FIG. 7 is a schematic structural diagram of a foldable display panel 10 provided in another embodiment of the first aspect of the present application in a flattened state.
  • the non-bending area PA includes a first non-bending area PA1 and a second non-bending area PA2 respectively arranged on both sides of the bending area TA, and a plurality of first driving circuits 210 is divided into the first non-bending area PA1 and the second non-bending area PA2.
  • Both the first non-bend area PA1 and the second non-bend area PA2 are provided with a first drive circuit 210, which can improve the uniformity of the display effect of the first non-bend area PA1 and the second non-bend area PA2, and improve the folding display
  • the display color shift of the panel 10 improves the display effect of the foldable display panel 10 .
  • the bending area TA includes a first bending area TA1 and a second bending area TA2 arranged side by side along the width direction, and the first bending area TA1 and the second bending area TA2
  • the first non-bending area PA1 is adjacent, and the second bending area TA2 is adjacent to the second non-bending area PA2
  • the first pixel group 110 includes the first sub-pixel located in the first bending area TA1 and the second sub-pixel located in the second The second sub-pixel in the bending area TA2
  • the first driving circuit 210 includes a first sub-circuit for driving the first sub-pixel and a second sub-circuit for driving the second sub-pixel, the first sub-circuit is located in the first non- In the bending area PA1, the second sub-circuit is located in the second non-bending area PA2.
  • the first sub-circuit is used to drive the first sub-pixel, the first sub-circuit is located in the first non-bending area PA1, and the first sub-pixel is located in the first bending area TA1, which can reduce the The distance between a sub-circuit and the first sub-pixel reduces the extension length of the first connection line 300 .
  • the second sub-circuit is used to drive the second sub-pixel, the second sub-circuit is located in the second non-bending area PA2, and the second sub-pixel is located in the second bending area TA2, which can reduce the size of the second sub-circuit and the second sub-pixel.
  • the distance between pixels reduces the extension length of the first connection line 300 . It is also possible to simplify the structure of the foldable display panel 10 and improve the manufacturing efficiency of the foldable display panel 10 .
  • the extension dimension of the first bending area TA1 and the second bending area TA2 is the bending area 1/2 of the extended dimension of TA.
  • first bending area TA1 and the second bending area TA2 be provided with the same number of first sub-pixels and second sub-pixels correspondingly, and then correspondingly be provided with the same number of first sub-circuits and second sub-circuits, that is The number of the first sub-circuits distributed in the first non-bending area PA1 and the second sub-circuits distributed in the second non-bending area PA2 are the same, which can further improve the first non-bending area PA1 and the second non-bending area PA1.
  • the display difference between the areas PA2 can improve the display color shift of the foldable display panel 10 and improve the display effect of the foldable display panel 10 .
  • a plurality of first sub-circuits are evenly distributed in the first non-bend area PA1, so that the display of the first non-bend area PA1 is more uniform, and the display of the first non-bend area PA1 itself is improved. color cast.
  • the plurality of second sub-circuits are evenly distributed in the second non-bend area PA2, so that the display of the second non-bend area PA2 is more uniform, and the display color shift of the second non-bend area PA2 itself is improved.
  • FIG. 8 is a schematic structural diagram of a foldable display panel 10 in a flattened state according to yet another embodiment of the first aspect of the present application.
  • the first non-bending area PA1 includes a first transition area PA11 adjacent to the first bending area TA1, and a first transition area PA11 located away from the first bending area TA1.
  • the first main display area PA12 on the side, and the first sub-circuit is located in the first transition area PA11.
  • the first sub-circuit is distributed in the first transition area PA11 that is closer to the first bending area TA1, which can reduce the distance between the first sub-pixel and the first sub-circuit, and reduce The extended length of the first connecting wire 300 improves the problem that the first connecting wire 300 is prone to breakage when bent.
  • the second pixel group 120 includes a first transition sub-pixel located in the first transition area PA11
  • the second driving circuit 220 includes a first transition circuit for driving the first transition sub-pixel
  • the first transition circuit is located in the first transition area PA11.
  • Transition zone PA11 the first transition area PA11 is provided with both a first transition circuit for driving the sub-pixels in this area and a first sub-circuit for driving the first sub-pixels in the bending area TA.
  • the second pixel group 120 includes a first main sub-pixel located in the first main display area PA12
  • the second driving circuit 220 includes a first main circuit for driving the first main sub-pixel
  • the first main circuit is located in the first main display area PA12. Display area PA12.
  • the second non-bending area PA2 includes a second transition area PA21 adjacent to the second bending area TA2, and a second transition area PA21 located away from the second bending area TA2.
  • the second main display area PA22 on the side, and the second sub-circuit is located in the second transition area PA21.
  • the second sub-circuit is distributed in the second transition area PA21 that is closer to the second bending area TA2, which can reduce the distance between the second sub-pixel and the second sub-circuit, and reduce The extended length of the first connecting wire 300 improves the problem that the first connecting wire 300 is prone to breakage when bent.
  • the second pixel group 120 includes a second transition sub-pixel located in the second transition area PA21
  • the second driving circuit 220 includes a second transition circuit for driving the second transition sub-pixel
  • the second transition circuit is located in the second transition area PA21.
  • Transition zone PA21 the second transition area PA21 is not only provided with a second transition circuit for driving the sub-pixels in this area, but also is provided with a second sub-circuit for driving the second sub-pixel in the bending area TA.
  • the second pixel group 120 includes a second main sub-pixel located in the second main display area PA22
  • the second driving circuit 220 includes a second main circuit for driving the second main sub-pixel
  • the second main circuit is located in the second main sub-pixel. Display area PA22.
  • FIG. 9 is a partial enlarged structural schematic diagram of still another embodiment where P is in FIG. 1 .
  • Fig. 10 is a schematic structural view of a foldable display panel 10 in a flattened state provided by still another embodiment of the first aspect of the present application.
  • FIG. 9 only schematically shows individual first pixel groups 110 and their connected first driving circuits 210 , and individual second pixel groups 210 and their connected second driving circuits.
  • the driving circuit 200 and the pixel group 100 it drives are distributed along the width direction in a dislocation manner. That is, the first driving circuit 210 and the first pixel group 110 it drives are arranged in a shifted direction along the width direction, and the second driving circuit 220 and the second pixel group 120 it drives are arranged in a shifted direction along the width direction.
  • the drive circuit 200 and the pixel group 100 are arranged in a misaligned position, which can improve the distribution density of the drive circuits 200 in the non-bend area PA, and improve the The display effect caused by the non-bending area PA.
  • connection wire layer 14 further includes second connection wires 400 , and each second connection wire 400 is used to connect each second electrode and each second driving circuit 220 .
  • first distance D1 there is a first distance D1 between the driving circuit 200 and the pixel group 100 it drives along the width direction.
  • the values of the first distance D1 corresponding to the plurality of pixel groups 100 may be the same or different.
  • the value of the first distance D1 corresponding to the pixel groups 100 in the same column is the same, and the value of the first distance D1 corresponding to the pixel groups 100 in different columns is different, and along the bending area TA to the adjacent non-bending area PA direction, the value of the first distance D1 decreases gradually, so that the non-bending area PA can accommodate the first driving circuit 210 and the second driving circuit 220, and the first driving circuit 210 and the second driving circuit 220 are in the non-bending Area PA is uniformly distributed.
  • the driving circuits 200 corresponding to the pixel groups 100 in the same column are arranged in the same column, the first non-bending area PA1 and/or the second non-bending area PA2 have N columns of second sub-pixels, the first bending area TA1 and/or The second bending area TA2 has M columns of first sub-pixels, the first non-bending area PA1 and/or the second non-bending area PA2 has M+N column driving circuits 200, and the M+N column driving circuits 200 are in the first The non-bending area PA1 and/or the second non-bending area PA2 are uniformly arranged.
  • the column direction is the Y direction in FIG. 9 .
  • the distance between each driving circuit 200 and the pixel group 100 it drives is the same, that is, the first distance D1 corresponding to the first sub-pixel and the second sub-pixel has the same value.
  • the first distance D1 between the driving circuit 200 and the pixel group 100 driven by it is half of the bending area TA. This enables the driving circuit 200 to maintain the original arrangement density without affecting the display effect of the foldable display panel 10 .
  • each non-bending area PA is provided with a non-display area NA on a side away from the bending area TA, and at least part of the driving circuit 200 is located in the non-display area NA.
  • the original arrangement density of the driving circuits 200 can be guaranteed.
  • the non-bending area PA includes a frame display area PA3 adjacent to the non-display area NA, and the drive circuit 200 for driving the pixel group 100 in the frame display area PA3 is located in the non-display area NA, which can reduce the The distance between the driving circuit 200 of the display area NA and the second sub-pixels driven by it reduces the extension length of the second connection line 400 .
  • the extension width of the frame display area PA3 is half of the extension width of the bending area TA. It can ensure that the driving circuits 200 are evenly distributed in the non-bend area PA and the non-display area NA.
  • the embodiment of the second aspect of the present application further provides a display device, including the foldable display panel 10 of any one of the above-mentioned embodiments of the first aspect. Since the display device provided by the embodiment of the second aspect of the present application includes the folding display panel 10 of any embodiment of the first aspect above, the display device provided by the embodiment of the second aspect of the present application has the folding display panel 10 of any embodiment of the first aspect above. The beneficial effects of the display panel 10 will not be repeated here.
  • the display devices in the embodiments of the present application include but are not limited to mobile phones, personal digital assistants (Personal Digital Assistant, PDA for short), tablet computers, e-books, televisions, access control, smart fixed phones, consoles and other devices with display functions .
  • PDA Personal Digital Assistant
  • FIG. 11 is a schematic flow chart of a manufacturing method of a foldable display panel 10 provided by an embodiment of the third aspect of the present application.
  • the foldable display panel 10 may be the foldable display panel 10 in any one of the first embodiments described above. Please refer to FIG. 1 to FIG. 11 together.
  • the manufacturing method of the foldable display panel 10 includes:
  • Step S01 preparing a first inorganic insulating layer 16 on the substrate 11 .
  • Step S02 Prepare the driving device layer 12 on the first inorganic insulating layer 16, the driving device layer 12 includes the first through hole located in the bending area TA and the driving circuit 200 located in the non-bending area PA, so that part of the first inorganic insulating layer Layer 16 is exposed by the first via.
  • Step S03 Patterning the first inorganic insulating layer 16 to form a second through hole located in the bending area TA, the second through hole and the first through hole communicate with each other.
  • Step S04 preparing a first planarization layer 15 on the driving device layer 12 , and part of the first planarization layer 15 is filled in the first through hole and the second through hole.
  • Step S05 preparing the connection wire layer 14 on the first planarization layer 15 , the connection wire layer 14 includes the first connection wire 300 , and the first connection wire 300 is connected to a part of the driving circuit 200 .
  • the driving circuit 200 is not provided in the bending area TA, which can improve the problem that the metal wires in the bending area TA are easily broken, thereby effectively improving the service life of the display panel. .
  • the driving device layer 12 includes an active layer 12a, a first conductive layer 12b, a second conductive layer 12c and a third conductive layer 12d .
  • a second inorganic insulating layer 17 is disposed between the active layer 12a and the first conductive layer 12b and between adjacent conductive layers.
  • the driving circuit 200 includes a transistor T and a storage capacitor C.
  • the transistor T includes a semiconductor b, a gate g, a source s and a drain d.
  • the storage capacitor C includes a first plate c1 and a second plate c2.
  • the gate g and the first plate c1 can be located on the first conductive layer 12b, the second plate c2 can be located on the second conductive layer 12c, and the source s and the drain d can be located on the third conductive layer 12d.
  • the second inorganic insulating layer 17 includes a first layer 17a, a second layer 17b and a third layer 17c
  • Fig. 12 is a schematic flowchart of a manufacturing method of a foldable display panel 10 provided in another embodiment of the third aspect of the present application.
  • step S02 includes:
  • Step S021 forming an active layer 12 a on the side of the first inorganic insulating layer 16 facing away from the substrate 11 , and patterning the active layer 12 a to form a semiconductor b located in the non-bend area PA.
  • Step S022 forming a first layer 17 a on the side of the active layer 12 a away from the first inorganic insulating layer 16 .
  • Step S023 forming the first conductive layer 12b on the side of the first layer 17a away from the active layer 12a, and patterning the first conductive layer 12b to form the gate g and the first plate c1.
  • the grid g and the first plate c1 are located in the non-bending area PA.
  • Step S024 forming a second layer 17b on the side of the first conductive layer 12b away from the first layer 17a.
  • Step S025 forming a second conductive layer 12c on the side of the second layer 17b away from the first conductive layer 12b, and patterning the second conductive layer 12c to form a second plate c2.
  • the second pole plate c2 is located in the non-bending area PA.
  • Step S026 forming a third layer 17c on the side of the second conductive layer 12c away from the second layer 17b.
  • Step S027 forming a third conductive layer 12d on the side of the third layer 17c away from the second layer 17b, and patterning the third conductive layer 12d to form a source s and a drain d.
  • the source s and the drain d are located in the non-bend area PA.
  • Step S028 Patterning the first layer 17a, the second layer 17b, and the third layer 17c in the bending area TA to form a first through hole, so that part of the first inorganic insulating layer 16 is exposed through the first through hole .
  • the first through hole is provided on the second inorganic insulating layer 17 in the bending area TA, which can reduce the distribution area of the second inorganic insulating layer 17 in the bending area TA, thereby improving the bending resistance of the bending area TA.
  • the second through hole is disposed on the first inorganic insulating layer 16 in the bending area TA, which can reduce the distribution area of the first inorganic insulating layer 16 in the bending area TA, thereby improving the bending resistance of the bending area TA.

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Abstract

本申请实施例提供一种折叠显示面板及折叠显示面板的制备方法，折叠显示面板具有弯折区、及在折叠显示面板宽度方向上位于弯折区两侧的非弯折区，折叠显示面板包括：像素组，包括位于弯折区的第一像素组及位于非弯折区的第二像素组；驱动电路，位于非弯折区并用于驱动像素组，驱动电路包括用于驱动第一像素组的第一驱动电路及用于驱动第二像素组的第二驱动电路。第一驱动电路和第二驱动电路均位于非弯折区，弯折区内未设置驱动电路，能够改善弯折区内金属走线易断裂的问题，进而有效提升显示面板的使用寿命。

Description

折叠显示面板及折叠显示面板的制备方法
相关申请的交叉引用
本申请要求享有于2021年07月30日提交的名称为“折叠显示面板、及折叠显示面板的制备方法”的中国专利申请第202110873925.7号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及显示设备技术领域，尤其涉及一种显示面板、显示装置及显示面板的制备方法。
背景技术
随着技术的不断发展，人们对显示装置的要求越来越高。如何增大显示装置的显示面积成为目前显示装置发展的重要方向。为了增大显示面积，一方面在尽可能最大化显示面积的同时缩窄四周边框，即“全面屏”。而在实现全面屏以后在机身尺寸不变的情况下，再想增大屏幕面积显然是不可能的，那么就需要另寻他法。折叠屏概念开始初步成型，在折叠状态下机身尺寸足以塞入口袋，展开的状态下等于原折叠尺寸两倍的面积。而折叠屏的弯折区域由于不耐弯折，弯折区域内的金属走线易发生断裂，严重影响折叠屏的使用寿命。
发明内容
本申请实施例提供一种折叠显示面板及折叠显示面板的制备方法，旨在提高折叠显示面板的使用寿命。
本申请第一方面的实施例提供了一种折叠显示面板，折叠显示面板具有弯折区、及在折叠显示面板宽度方向上位于弯折区两侧的非弯折区，折叠显示面板包括：像素组，包括位于弯折区的第一像素组及位于非弯折区的第二像素组；驱动电路，位于非弯折区并用于驱动像素组，驱动电路包括用于驱动第一像素组的第一驱动电路及用于驱动第二像素组的第二驱动电路。
根据本申请第一方面的实施方式，还包括：
衬底；
驱动器件层，位于衬底，驱动电路设置于驱动器件层；
第一电极层，位于驱动器件层背离衬底的一侧，第一电极层包括位于弯折区的第一电极及位于非弯折区的第二电极；
连接线层，位于第一电极层和驱动器件层之间，连接线层包括第一连接线，各第一驱动电路通过第一连接线连接各第一电极。
根据本申请第一方面前述任一实施方式，折叠显示面板还包括控制器，用于分别控制第一驱动电路和第二驱动电路相互独立运行。
根据本申请第一方面前述任一实施方式，折叠显示面板还包括：
第一平坦化层，第一平坦化层位于驱动器件层和连接线层之间；
驱动器件层包括位于弯折区的第一通孔，至少部分第一平坦化层填充于第一通孔。
根据本申请第一方面前述任一实施方式，折叠显示面板还包括：第一无机绝缘层，第一无机绝缘层位于驱动器件层朝向衬底的一侧，第一无机绝缘层包括位于弯折区的第二通孔，第二通孔和第一通孔连通，至少部分第一平坦化层填充于第二通孔。
根据本申请第一方面前述任一实施方式，弯折区包括沿宽度方向并排设置的第一弯折区和第二弯折区，非弯折区包括与第一弯折区相邻的第一非弯折区和与第二弯折区相邻的第二非弯折区；
第一像素组包括位于第一弯折区的第一子像素和位于第二弯折区的第二子像素；
第一驱动电路包括用于驱动第一子像素的第一子电路及用于驱动第二子像素的第二子电路，第一子电路位于第一非弯折区，第二子电路位于第二非弯折区。
根据本申请第一方面前述任一实施方式，沿宽度方向，第一弯折区和/或第二弯折区的延伸尺寸为弯折区延伸尺寸的二分之一。
根据本申请第一方面前述任一实施方式，多个第一子电路在第一非弯折区均匀分布；和/或，多个第二子电路在第二非弯折区均匀分布。
根据本申请第一方面前述任一实施方式，第一非弯折区包括和第一弯折区相邻设置的第一过渡区、及位于第一过渡区背离第一弯折区一侧的第一主显示区，第一子电路位于第一过渡区。
根据本申请第一方面前述任一实施方式，第二像素组包括位于第一过渡区的第一过渡子像素，第二驱动电路包括用于驱动第一过渡子像素的第一过渡电路，第一过渡电路位于第一过渡区。
根据本申请第一方面前述任一实施方式，第二像素组包括位于第一主显示区的第一主子像素，第二驱动电路包括用于驱动第一主子像素的第一主电路，第一主电路位于第一主显示区。
根据本申请第一方面前述任一实施方式，第二非弯折区包括和第二弯折区相邻设置的第二过渡区、及位于第二过渡区背离第二弯折区一侧的第二主显示区，第二子电路位于第二过渡区。
根据本申请第一方面前述任一实施方式，第二像素组包括位于第二过渡区的第二过渡子像素，第二驱动电路包括用于驱动第二过渡子像素的第二过渡电路，第二过渡电路位于第二过渡区。
根据本申请第一方面前述任一实施方式，第二像素组包括位于第二主显示区的第二主子像素，第二驱动电路包括用于驱动第二主子像素的第二主电路，第二主电路位于第二主显示区。
根据本申请第一方面前述任一实施方式，驱动电路与其驱动的像素组沿宽度方向错位分布；
连接线层还包括第二连接线，各第二连接线用于连接各第二电极和各第二驱动电路。
根据本申请第一方面前述任一实施方式，驱动电路与其驱动的像素组之间具有第一间距，在弯折区至与其相邻的非弯折区的方向上，第一间距的取值逐渐减小。
根据本申请第一方面前述任一实施方式，第一驱动电路和第二驱动电路在非弯折区均匀分布。
根据本申请第一方面前述任一实施方式，沿宽度方向，驱动电路与其驱动的像素组的间距为弯折区的二分之一。
根据本申请第一方面前述任一实施方式，各非弯折区背离弯折区的一侧均设置有非显示区，至少部分驱动电路位于非显示区。
根据本申请第一方面前述任一实施方式，非弯折区包括与非显示区相邻设置的边框显示区，用于驱动边框显示区内像素组的驱动电路位于非显示区。
根据本申请第一方面前述任一实施方式，沿宽度方向，边框显示区的延伸宽度为弯折区延伸宽度的二分之一。
本申请第二方面的实施例还提供了一种显示装置，包括上述任一第一方面实施例的显示面板。
本申请第三方面的实施例还提供了一种折叠显示面板的制备方法，折叠显示面板包括弯折区及位于弯折区两侧的非弯折区，制备方法包括：
在衬底上制备第一无机绝缘层；
在第一无机绝缘层上制备驱动器件层，驱动器件层包括位于弯折区的第一通孔和位于非弯折区的驱动电路，令部分第一无机绝缘层由第一通孔露出；
对第一无机绝缘层进行图案化处理，以形成位于弯折区的第二通孔，第二通孔和第一通孔相互连通；
在驱动器件层上制备第一平坦化层，部分第一平坦化层填充于第一通孔和第二通孔；
在第一平坦化层上制备连接线层，连接线层包括第一连接线，第一连接线连接部分驱动电路。
在本申请实施例提供的折叠显示面板中，折叠显示面板包括弯折区和非弯折区，折叠显示面板通过弯折区弯折实现折叠和展开。折叠显示面板包括像素组和驱动电路，像素组包括第一像素组和第二像素组，第一像素组用于实现弯折区的显示，第二像素组用于实现非弯折区的显示。驱动电路的第一驱动电路和第二驱动电路分别驱动第一像素组和第二像素组显示。第一驱动电路和第二驱动电路均位于非弯折区，弯折区内未设置驱动电路，能够改善弯折区内金属走线易断裂的问题，进而有效提升显示面板的使用寿命。
附图说明
通过阅读以下参照附图对非限制性实施例所作的详细描述，本申请的其它特征、目的和优点将会变得更明显，其中，相同或相似的附图标记表示相同或相似的特征。
图1是本申请第一方面实施例提供的一种折叠显示面板在展平状态下的结构示意图；
图2是本申请第一方面实施例提供的一种折叠显示面板在折叠状态下的结构示意图；
图3是图1中P处的局部放大结构示意图；
图4是本申请第一方面实施例提供的一种折叠显示面板的层结构示意图；
图5是本申请第一方面实施例提供的一种折叠显示面板的弯折区的层结构示意图；
图6是本申请第一方面实施例提供的一种折叠显示面板的非弯折区的层结构示意图；
图7是本申请第一方面另一实施例提供的一种折叠显示面板在展平状态下的结构示意图；
图8是本申请第一方面又一实施例提供的一种折叠显示面板在展平状态下的结构示意图；
图9是图1中P处在还一实施例中的局部放大结构示意图；
图10是本申请第一方面还一实施例提供的一种折叠显示面板在展平状态下的结构示意图；
图11是本申请第三方面实施例提供的一种折叠显示面板的制备方法流程示意图；
图12是本申请第三方面另一实施例提供的一种折叠显示面板的制备方法流程示意 图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。在下面的详细描述中，提出了许多具体细节，以便提供对本申请的全面理解。但是，对于本领域技术人员来说很明显的是，本申请可以在不需要这些具体细节中的一些细节的情况下实施。下面对实施例的描述仅仅是为了通过示出本申请的示例来提供对本申请的更好的理解。在附图和下面的描述中，至少部分的公知结构和技术没有被示出，以便避免对本申请造成不必要的模糊；并且，为了清晰，可能夸大了部分结构的尺寸。此外，下文中所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。
为了更好地理解本申请，下面结合图1至图12对本申请实施例的折叠显示面板、显示装置及折叠显示面板的制备方法进行详细描述。
请一并参阅图1和图2，图1是本申请第一方面实施例提供的一种折叠显示面板10在展平状态下的结构示意图；图2是本申请第一方面实施例提供的一种折叠显示面板10在折叠状态下的结构示意图。
如图1所示，折叠显示面板10具有弯折区TA、及在折叠显示面板10宽度方向(图1中的X方向)上位于弯折区TA两侧的非弯折区PA。如图2所示，折叠显示面板10通过弯折区TA的弯折实现在展平状态和折叠状态的转变。
请一并参阅图1和图3，图3是图1中P处的局部放大结构示意图。
如图1和图3所示，折叠显示面板10包括：像素组100，包括位于弯折区TA的第一像素组110及位于非弯折区PA的第二像素组120；驱动电路200，位于非弯折区PA并用于驱动像素组100，驱动电路200包括用于驱动第一像素组110的第一驱动电路210及用于驱动第二像素组120的第二驱动电路220。
在本申请实施例提供的折叠显示面板10中，折叠显示面板10包括像素组100和驱动电路200，像素组100包括第一像素组110和第二像素组120，第一像素组110用于实现弯折区TA的显示，第二像素组120用于实现非弯折区PA的显示。驱动电路200的第一驱动电路210和第二驱动电路220分别驱动第一像素组110和第二像素组120显示。第一驱动电路210和第二驱动电路220均位于非弯折区PA，弯折区TA内未设置驱动电路200，能够改善弯折区TA内金属走线易断裂的问题，进而有效提升显示面板的使用寿命。
发明人发现，驱动电路200通常由层叠设置的图案化金属层组成，层叠的金属层之间通常设置有无机绝缘层。无机绝缘层具有不耐弯折、易发生断裂的问题。在本申请实施例中，当弯折区TA未设置驱动电路200时，也可以去除弯折区TA的无机绝缘层，以提高弯折区TA的柔性。由于弯折区TA不存在驱动电路200，弯折区TA内还 留有空间填充有机膜层以进一步提升弯折区TA的抗弯折能力，提高折叠显示面板10的使用寿命。
图3中仅示意出个别第一像素组110及其对应连接的第一驱动电路210、以及第二像素组120及其对应的第二驱动电路220。可选的，第一像素组110和第一驱动电路210一一对应设置，各第一驱动电路210分别驱动各第一像素组110；或者第一驱动电路210和第一像素组110为一对多设置，同一第一驱动电路210用于驱动两个以上颜色相同的第一像素组110。可选的，第二像素组120和第二驱动电路220一一对应设置，各第二驱动电路220分别驱动各第二像素组120；或者第二驱动电路220和第二像素组120为一对多设置，同一第二驱动电路220用于驱动两个以上颜色相同的第二像素组120。
第一像素组110和第二像素组120的设置方式有多种，例如第一像素组110和第二像素组120均包括红色子像素、绿色子像素和蓝色子像素。在其他实施例中，第一像素组110和第二像素组120还可以包括黄色子像素等。
请一并参阅图3和图4，图4是本申请第一方面实施例提供的一种折叠显示面板10的层结构示意图。
如图3和图4所示，折叠显示面板10的层结构包括：衬底11；驱动器件层12，位于衬底11，驱动电路200设置于驱动器件层12；第一电极层13，位于驱动器件层12背离衬底11的一侧，第一电极层13包括位于弯折区TA的第一电极500及位于非弯折区PA的第二电极(图中未示出)；连接线层14，位于第一电极层13和驱动器件层12之间，连接线层14包括第一连接线300，各第一驱动电路210通过第一连接线300连接各第一电极500。
在这些可选的实施例中，通过增加连接线层14能够实现位于弯折区TA的第一电极500和位于非弯折区PA的第一驱动电路210的连接。连接线层14为金属走线层，能够保证弯折区TA具有良好的抗弯折性能。
可选的，折叠显示面板10还包括：第一无机绝缘层16，位于驱动器件层12朝向衬底11的一侧。
驱动器件层12的设置方式有多种，如图4所示，例如驱动器件层12包括有源层12a和若干导电层，若干导电层包括第一导电层12b、第二导电层12c和第三导电层12d。有源层12a、第一导电层12b之间及相邻的导电层之间均设置有第二无机绝缘层17。示例性的，驱动电路200包括晶体管T和存储电容C。晶体管T包括半导体b、栅极g、源极s及漏极d。存储电容C包括第一极板c1和第二极板c2。作为一个示例，栅极g及第一极板c1可以位于第一导电层12b，第二极板c2可以位于第二导电层12c，源极s和漏极d可以位于第三导电层12d。可选的，驱动器件层12还可以包括数据信号线(Data line)、电源信号线(Vdd line)、参考电压信号线(Vref line)、扫描 信号线(Scan line)和发光控制信号线(Emit line)中的至少一者。
可选的，可折叠显示面板10还包括控制器(图中未示出)，控制器用于控制弯折区TA和非弯折区PA相互独立显示。例如，控制器用于分别控制第一驱动电路210和第二驱动电路220相互独立运行。由于弯折区TA和非弯折区PA的层结构不同，通过控制器控制弯折区TA和非弯折区PA相互独立显示，能够提高可折叠显示面板10的整体显示效果。例如，可折叠显示面板10选用双gamma系统，控制器相互独立地控制弯折区TA和非弯折区PA的数据信号线。
可选的，第二无机绝缘层17为一层或多层，例如第二无机绝缘层17包括第一分层17a、第二分层17b和第三分层17c，第一分层17a位于有源层12a和第一导电层12b之间，第二分层17b位于第一导电层12b和第二导电层12c之间，第三分层17c位于第二导电层12c和第三导电层12d之间。
由于弯折区TA未设置驱动电路200，因此弯折区TA的第一导电层12b、第二导电层12c和第三导电层12d可以做挖孔处理。弯折区TA的第一导电层12b、第二导电层12c和第三导电层12d之间无需相互绝缘，那么第二无机绝缘层17也可以在弯折区TA做挖孔处理。第一导电层12b、第二导电层12c和第三导电层12d上的挖孔和第二无机绝缘层17上的挖孔形成位于驱动器件层12的第一通孔，即驱动器件层12包括位于弯折区TA的第一通孔。
在一些可选的实施例中，折叠显示面板10还包括：第一平坦化层15，位于驱动器件层12和连接线层14之间，当驱动器件层12上具有第一通孔时，至少部分第一平坦化层15填充于第一通孔内。在这些可选的实施例中，由于弯折区TA的第二无机绝缘层17进行了挖孔处理，能够有效提高弯折区TA的抗弯折性能。
可选的，为了进一步提升弯折区TA的抗弯折性能，第一无机绝缘层16包括位于弯折区TA的第二通孔，第二通孔和第一通孔连通，至少部分第一平坦化层15填充于第二通孔。
在这些可选的实施例中，对第一无机绝缘层16进行了挖孔处理，在第一无机绝缘层16上形成了第二通孔，减小了弯折区TA的第二无机绝缘层17的分布面积，能够进一步提升弯折区TA的抗弯折性能。
第一无机绝缘层16例如包括氧化硅层和/或氮化硅层，第二无机绝缘层17例如包括氧化硅层和/或氮化硅层。
可选的，可折叠显示面板10还包括：第二平坦化层18，位于连接线层14和第一电极层13之间；像素定义层19，位于第一电极层13背离连接线层14的一侧。像素定义层19包括本体部和像素开口，各第一电极500和第二电极与各像素开口对应设置，像素开口用于填充发光材料以实现可折叠显示面板10的发光显示。
请一并参阅图5和图6，图5是本申请第一方面实施例提供的一种折叠显示面板 10的弯折区TA的层结构示意图，图6是本申请第一方面实施例提供的一种折叠显示面板10的非弯折区PA的层结构示意图。
如图5和图6所示，在一些可选的实施例中，弯折区TA包括衬底11、第一平坦化层15、连接线层14、第二平坦化层18、第一电极层13和像素定义层19等。弯折区TA的层结构数量较少，抗弯折性能较好。非弯折显示区包括衬底11、第一无机绝缘层16、有源层12a、第一分层17a、第一导线层12b、第二分层17b、第二导线层12c、第三分层17c、第三金属层12d、第一平坦化层15、连接线层14、第二平坦化层18、第一电极层13和像素定义层19等。
请一并参阅图3和图7，图7是本申请第一方面另一实施例提供的一种折叠显示面板10在展平状态下的结构示意图。
如图3和图7所示，可选的，非弯折区PA包括分设于弯折区TA两侧的第一非弯折区PA1和第二非弯折区PA2，多个第一驱动电路210分设于第一非弯折区PA1和第二非弯折区PA2。第一非弯折区PA1和第二非弯折区PA2均设置有第一驱动电路210，能够提高第一非弯折区PA1和第二非弯折区PA2显示效果的均一性，改善折叠显示面板10的显示色偏，提高折叠显示面板10的显示效果。
在一些可选的实施例中，如图3和图7所示，弯折区TA包括沿宽度方向并排设置的第一弯折区TA1和第二弯折区TA2，第一弯折区TA1与第一非弯折区PA1相邻，第二弯折区TA2和与第二非弯折区PA2相邻；第一像素组110包括位于第一弯折区TA1的第一子像素和位于第二弯折区TA2的第二子像素；第一驱动电路210包括用于驱动第一子像素的第一子电路及用于驱动第二子像素的第二子电路，第一子电路位于第一非弯折区PA1，第二子电路位于第二非弯折区PA2。
在这些可选的实施例中，第一子电路用于驱动第一子像素，第一子电路位于第一非弯折区PA1，第一子像素位于第一弯折区TA1，能够减小第一子电路和第一子像素之间的间距，减小第一连接线300的延伸长度。同样，第二子电路用于驱动第二子像素，第二子电路位于第二非弯折区PA2，第二子像素位于第二弯折区TA2，能够减小第二子电路和第二子像素之间的间距，减小第一连接线300的延伸长度。还能够简化折叠显示面板10的结构，提升折叠显示面板10的制备效率。
第一弯折区TA1和第二弯折区TA2的延伸尺寸有多种，可选的，沿宽度方向，第一弯折区TA1和/或第二弯折区TA2的延伸尺寸为弯折区TA延伸尺寸的二分之一。令第一弯折区TA1和第二弯折区TA2对应设置有相同个数的第一子像素和第二子像素，进而对应设置有相同个数的第一子电路和第二子电路，即第一非弯折区PA1内分布的第一子电路和第二非弯折区PA2内分布的第二子电路的个数相同，能够进一步改善第一非弯折区PA1和第二非弯折区PA2之间的显示差异，改善折叠显示面板10的显示色偏，提高折叠显示面板10的显示效果。
在一些可选的实施例中，多个第一子电路在第一非弯折区PA1均匀分布，使得第一非弯折区PA1的显示更均一，改善第一非弯折区PA1本身的显示色偏。
可选的，多个第二子电路在第二非弯折区PA2均匀分布，使得第二非弯折区PA2的显示更均一，改善第二非弯折区PA2本身的显示色偏。
请一并参阅图3和图8，图8是本申请第一方面又一实施例提供的一种折叠显示面板10在展平状态下的结构示意图。
在另一些可选的实施例中，第一非弯折区PA1包括和第一弯折区TA1相邻设置的第一过渡区PA11、及位于第一过渡区PA11背离第一弯折区TA1一侧的第一主显示区PA12，第一子电路位于第一过渡区PA11。
在这些可选的实施例中，第一子电路分布于距离第一弯折区TA1较近的第一过渡区PA11，能够减小第一子像素和第一子电路之间的距离，减小第一连接线300的延伸长度，改善第一连接线300弯折易发生断裂的问题。
可选的，第二像素组120包括位于第一过渡区PA11的第一过渡子像素，第二驱动电路220包括用于驱动第一过渡子像素的第一过渡电路，第一过渡电路位于第一过渡区PA11。在这些可选的实施例中，第一过渡区PA11既设置有用于驱动本区子像素的第一过渡电路，也设置有用于驱动弯折区TA第一子像素的第一子电路。
可选的，第二像素组120包括位于第一主显示区PA12的第一主子像素，第二驱动电路220包括用于驱动第一主子像素的第一主电路，第一主电路位于第一主显示区PA12。
在另一些可选的实施例中，第二非弯折区PA2包括和第二弯折区TA2相邻设置的第二过渡区PA21、及位于第二过渡区PA21背离第二弯折区TA2一侧的第二主显示区PA22，第二子电路位于第二过渡区PA21。
在这些可选的实施例中，第二子电路分布于距离第二弯折区TA2较近的第二过渡区PA21，能够减小第二子像素和第二子电路之间的距离，减小第一连接线300的延伸长度，改善第一连接线300弯折易发生断裂的问题。
可选的，第二像素组120包括位于第二过渡区PA21的第二过渡子像素，第二驱动电路220包括用于驱动第二过渡子像素的第二过渡电路，第二过渡电路位于第二过渡区PA21。在这些可选的实施例中，第二过渡区PA21既设置有用于驱动本区子像素的第二过渡电路，也设置有用于驱动弯折区TA第二子像素的第二子电路。
可选的，第二像素组120包括位于第二主显示区PA22的第二主子像素，第二驱动电路220包括用于驱动第二主子像素的第二主电路，第二主电路位于第二主显示区PA22。
请一并参阅图9和图10，图9是图1中P处在还一实施例中的局部放大结构示意图。图10是本申请第一方面还一实施例提供的一种折叠显示面板10在展平状态下的 结构示意图。图9中仅示意出个别第一像素组110及其连接的第一驱动电路210，个别第二像素组210及其连接的第二驱动电路。
在还一些可选的实施例中，驱动电路200与其驱动的像素组100沿宽度方向错位分布。即第一驱动电路210与其驱动的第一像素组110沿宽度方向错位设置，第二驱动电路220与其驱动的第二像素组120沿宽度方向错位设置。
在这些可选的实施例中，驱动电路200和像素组100错位设置，能够改善非弯折区PA的驱动电路200分布密度，改善因将第一驱动电路210设置于非弯折区PA而对非弯折区PA造成的显示影响。
可选的，连接线层14还包括第二连接线400，各第二连接线400用于连接各第二电极和各第二驱动电路220。
例如，驱动电路200与其驱动的像素组100之间沿宽度方向具有第一间距D1。多个像素组100对应的第一间距D1的取值可以相同或不同。例如同一列的像素组100对应的第一间距D1的取值相同，不同列像素组100对应的第一间距D1的取值不同，且沿弯折区TA至与其相邻的非弯折区PA的方向，第一间距D1取值逐渐减小，以使非弯折区PA能够容纳下第一驱动电路210和第二驱动电路220，第一驱动电路210和第二驱动电路220在非弯折区PA均匀分布。
例如，同一列像素组100对应的驱动电路200同列排布，第一非弯折区PA1和/或第二非弯折区PA2具有N列第二子像素，第一弯折区TA1和/或第二弯折区TA2具有M列第一子像素，第一非弯折区PA1/或第二非弯折区PA2具有M+N列驱动电路200，且M+N列驱动电路200在第一非弯折区PA1/或第二非弯折区PA2均匀排布。列方向为图9中的Y方向。
在另一些可选的实施例中，各驱动电路200与其驱动的像素组100之间的间距相同，即第一子像素和第二子像素对应的第一间距D1取值相同。
例如，沿宽度方向，驱动电路200与其驱动的像素组100的第一间距D1为弯折区TA的二分之一。使得驱动电路200能够保持原有的排布密度，不会影响折叠显示面板10的显示效果。
可选的，各非弯折区PA背离弯折区TA的一侧均设置有非显示区NA，至少部分驱动电路200位于非显示区NA。通过将部分驱动电路200设置于非显示区NA能保证驱动电路200保持原有的排布密度。
可选的，非弯折区PA包括与非显示区NA相邻设置的边框显示区PA3，用于驱动边框显示区PA3内像素组100的驱动电路200位于非显示区NA，能够减小位于非显示区NA的驱动电路200与其驱动的第二子像素之间的间距，减小第二连接线400的延伸长度。
可选的，沿宽度方向，边框显示区PA3的延伸宽度为弯折区TA延伸宽度的二分 之一。能够保证各驱动电路200在非弯折区PA和非显示区NA均匀分布。
本申请第二方面的实施例还提供一种显示装置，包括上述任一第一方面实施例的折叠显示面板10。由于本申请第二方面实施例提供的显示装置包括上述第一方面任一实施例的折叠显示面板10，因此本申请第二方面实施例提供的显示装置具有上述第一方面任一实施例的折叠显示面板10具有的有益效果，在此不再赘述。
本申请实施例中的显示装置包括但不限于手机、个人数字助理(Personal Digital Assistant，简称：PDA)、平板电脑、电子书、电视机、门禁、智能固定电话、控制台等具有显示功能的设备。
请参阅图11，图11是本申请第三方面实施例提供的一种折叠显示面板10的制备方法流程示意图。
折叠显示面板10可以为上述任一第一方面实施例的折叠显示面板10。请一并参阅图1至图11，折叠显示面板10的制备方法包括：
步骤S01：在衬底11上制备第一无机绝缘层16。
步骤S02：在第一无机绝缘层16上制备驱动器件层12，驱动器件层12包括位于弯折区TA的第一通孔和位于非弯折区PA的驱动电路200，令部分第一无机绝缘层16由第一通孔露出。
步骤S03：对第一无机绝缘层16进行图案化处理，以形成位于弯折区TA的第二通孔，第二通孔和第一通孔相互连通。
步骤S04：在驱动器件层12上制备第一平坦化层15，部分第一平坦化层15填充于第一通孔和第二通孔。
步骤S05：在第一平坦化层15上制备连接线层14，连接线层14包括第一连接线300，第一连接线300连接部分驱动电路200。
在本申请实施例提供的折叠显示面板10的制备方法中，弯折区TA内未设置驱动电路200，能够改善弯折区TA内金属走线易断裂的问题，进而有效提升显示面板的使用寿命。
可选的，步骤S02的制备方法有多种，作为一个一种可选的实施例，驱动器件层12包括有源层12a、第一导电层12b、第二导电层12c和第三导电层12d。有源层12a与第一导电层12b之间及相邻的导电层之间均设置有第二无机绝缘层17。驱动电路200包括晶体管T和存储电容C。晶体管T包括半导体b、栅极g、源极s及漏极d。存储电容C包括第一极板c1和第二极板c2。栅极g及第一极板c1可以位于第一导电层12b，第二极板c2可以位于第二导电层12c，源极s、漏极d可以位于第三导电层12d。第二无机绝缘层17包括第一分层17a、第二分层17b和第三分层17c
如图12所示，图12是本申请第三方面另一实施例提供的折叠显示面板10的制备 方法流程示意图。在图12中，步骤S02包括：
步骤S021：在第一无机绝缘层16背离衬底11的一侧形成有源层12a，对有源层12a进行图案化处理形成半导体b，半导体b位于非弯折区PA。
步骤S022：在有源层12a背离第一无机绝缘层16的一侧形成第一分层17a。
步骤S023：在第一分层17a背离有源层12a的一侧形成第一导电层12b，对第一导电层12b进行图案化处理形成栅极g及第一极板c1。栅极g及第一极板c1位于非弯折区PA。
步骤S024：在第一导电层12b背离第一分层17a的一侧形成第二分层17b。
步骤S025：在第二分层17b背离第一导电层12b的一侧形成第二导电层12c，对第二导电层12c进行图案化处理形成第二极板c2。第二极板c2位于非弯折区PA。
步骤S026：在第二导电层12c背离第二分层17b的一侧形成第三分层17c。
步骤S027：在第三分层17c背离第二分层17b的一侧形成第三导电层12d，对第三导电层12d进行图案化处理形成源极s和漏极d。源极s、漏极d位于非弯折区PA。
步骤S028：在弯折区TA对第一分层17a、第二分层17b和第三分层17c进行图案化处理形成第一通孔，令部分第一无机绝缘层16由第一通孔露出。
弯折区TA内第二无机绝缘层17上设置有第一通孔，能够减小弯折区TA内第二无机绝缘层17的分布面积，进而提升弯折区TA的抗弯折性能。弯折区TA内第一无机绝缘层16上设置有第二通孔，能够减小弯折区TA内第一无机绝缘层16的分布面积，进而提升弯折区TA的抗弯折性能。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (20)

  1. 一种折叠显示面板，所述折叠显示面板具有弯折区、及在所述折叠显示面板宽度方向上位于所述弯折区两侧的非弯折区，所述折叠显示面板包括：
    像素组，包括位于所述弯折区的第一像素组及位于所述非弯折区的第二像素组；
    驱动电路，位于所述非弯折区并用于驱动所述像素组，所述驱动电路包括用于驱动所述第一像素组的第一驱动电路及用于驱动所述第二像素组的第二驱动电路。
  2. 根据权利要求1所述的折叠显示面板，还包括：
    衬底；
    驱动器件层，位于所述衬底，所述驱动电路设置于所述驱动器件层；
    第一电极层，位于所述驱动器件层背离所述衬底的一侧，所述第一电极层包括位于所述弯折区的第一电极及位于所述非弯折区的第二电极；
    连接线层，位于所述第一电极层和所述驱动器件层之间，所述连接线层包括第一连接线，各所述第一驱动电路通过所述第一连接线连接各所述第一电极。
  3. 根据权利要求2所述的折叠显示面板，其中，所述折叠显示面板还包括
    第一平坦化层，所述第一平坦化层位于所述驱动器件层和所述连接线层之间；
    所述驱动器件层包括位于所述弯折区的第一通孔，至少部分所述第一平坦化层填充于所述第一通孔。
  4. 根据权利要求3所述的折叠显示面板，其中，所述折叠显示面板还包括第一无机绝缘层，所述第一无机绝缘层位于所述驱动器件层朝向所述衬底的一侧，所述第一无机绝缘层包括位于所述弯折区的第二通孔，所述第二通孔和所述第一通孔连通，至少部分所述第一平坦化层填充于所述第二通孔。
  5. 根据权利要求4所述的折叠显示面板，其中，所述驱动器件层包括有源层及若干导电层，所述有源层与导电层之间、及相邻的导电层设置有第二无机绝缘层。
  6. 根据权利要求3所述的折叠显示面板，其中，进一步包括第二平坦化层及像素定义层，所述第二平坦化层位于所述连接线层和第一电极层之间；所述像素定义层位于所述第一电极层背离所述连接线层的一侧，所述像素定义层包括本体部和像素开口，各所述第一电极和所述第二电极与各所述像素开口对应设置，所述像素开口用于填充发光材料。
  7. 根据权利要求1所述的折叠显示面板，其中，
    所述弯折区包括沿所述宽度方向并排设置的第一弯折区和第二弯折区，所述非弯折区包括与所述第一弯折区相邻的第一非弯折区和与所述第二弯折区相邻的第二非弯折区；
    所述第一像素组包括位于所述第一弯折区的第一子像素和位于所述第二弯折区的 第二子像素；
    所述第一驱动电路包括用于驱动所述第一子像素的第一子电路及用于驱动所述第二子像素的第二子电路，所述第一子电路位于所述第一非弯折区，所述第二子电路位于所述第二非弯折区。
  8. 根据权利要求7所述的折叠显示面板，其中，沿所述宽度方向，所述第一弯折区和/或所述第二弯折区的延伸尺寸为所述弯折区延伸尺寸的二分之一。
  9. 根据权利要求7所述的折叠显示面板，其中，多个所述第一子电路在所述第一非弯折区均匀分布；和/或，多个所述第二子电路在所述第二非弯折区均匀分布。
  10. 根据权利要求7所述的折叠显示面板，其中，所述第一非弯折区包括和所述第一弯折区相邻设置的第一过渡区、及位于所述第一过渡区背离所述第一弯折区一侧的第一主显示区，所述第一子电路位于所述第一过渡区。
  11. 根据权利要求10所述的折叠显示面板，其中，所述第二像素组包括位于所述第一过渡区的第一过渡子像素，所述第二驱动电路包括用于驱动所述第一过渡子像素的第一过渡电路，所述第一过渡电路位于所述第一过渡区；
    所述第二像素组包括位于所述第一主显示区的第一主子像素，所述第二驱动电路包括用于驱动所述第一主子像素的第一主电路，所述第一主电路位于所述第一主显示区。
  12. 根据权利要求7所述的折叠显示面板，其中，
    所述第二非弯折区包括和所述第二弯折区相邻设置的第二过渡区、及位于所述第二过渡区背离所述第二弯折区一侧的第二主显示区，所述第二子电路位于所述第二过渡区。
  13. 根据权利要求12所述的折叠显示面板，其中，所述第二像素组包括位于所述第二过渡区的第二过渡子像素，所述第二驱动电路包括用于驱动所述第二过渡子像素的第二过渡电路，所述第二过渡电路位于所述第二过渡区。
  14. 根据权利要求12所述的折叠显示面板，其中，所述第二像素组包括位于所述第二主显示区的第二主子像素，所述第二驱动电路包括用于驱动所述第二主子像素的第二主电路，所述第二主电路位于所述第二主显示区。
  15. 根据权利要求2所述的折叠显示面板，其中，
    所述驱动电路与其驱动的所述像素组沿所述宽度方向错位分布；
    所述连接线层还包括第二连接线，各所述第二连接线用于连接各所述第二电极和各所述第二驱动电路。
  16. 根据权利要求15所述的折叠显示面板，其中，所述驱动电路与其驱动的所述像素组之间具有第一间距，在所述弯折区至与其相邻的所述非弯折区的方向上，所述第一间距的取值逐渐减小。
  17. 根据权利要求15所述的折叠显示面板，其中，沿所述宽度方向，所述驱动电路与其驱动的所述像素组的间距为所述弯折区的二分之一。
  18. 根据权利要求17所述的折叠显示面板，其中，所述非弯折区包括与所述非显示区相邻设置的边框显示区，用于驱动所述边框显示区内所述像素组的所述驱动电路位于所述非显示区。
  19. 根据权利要求1所述的折叠显示面板，其中，所述弯折区未设置所述驱动电路。
  20. 一种折叠显示面板的制备方法，其中，所述折叠显示面板包括弯折区及位于所述弯折区两侧的非弯折区，所述制备方法包括：
    在衬底上制备第一无机绝缘层；
    在所述第一无机绝缘层上制备驱动器件层，所述驱动器件层包括位于所述弯折区的第一通孔和位于所述非弯折区的驱动电路，令部分所述第一无机绝缘层由所述第一通孔露出；
    对所述第一无机绝缘层进行图案化处理，以形成位于所述弯折区的第二通孔，所述第二通孔和所述第一通孔相互连通；
    在所述驱动器件层上制备第一平坦化层，部分所述第一平坦化层填充于所述第一通孔和所述第二通孔；
    在所述第一平坦化层上制备连接线层，所述连接线层包括第一连接线，所述第一连接线连接部分所述驱动电路。
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