CN111162203B - Back film and preparation method thereof, flexible display device and preparation method thereof, and cutting die - Google Patents
Back film and preparation method thereof, flexible display device and preparation method thereof, and cutting die Download PDFInfo
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- CN111162203B CN111162203B CN202010002060.2A CN202010002060A CN111162203B CN 111162203 B CN111162203 B CN 111162203B CN 202010002060 A CN202010002060 A CN 202010002060A CN 111162203 B CN111162203 B CN 111162203B
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- 238000002360 preparation method Methods 0.000 title abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000012217 deletion Methods 0.000 abstract description 2
- 230000037430 deletion Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 319
- 239000010410 layer Substances 0.000 description 86
- 239000000758 substrate Substances 0.000 description 69
- 238000005452 bending Methods 0.000 description 56
- 238000010586 diagram Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 7
- 238000005538 encapsulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 239000006059 cover glass Substances 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 239000002096 quantum dot Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 229910020286 SiOxNy Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002313 adhesive film Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
-
- 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
- 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
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/80—Manufacture or treatment specially adapted for the organic devices covered by this subclass using temporary substrates
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the invention provides a back film, a preparation method thereof, a flexible display device, a preparation method thereof and a cutting die, relates to the technical field of display, and can solve the problem that the cutting edge of a first part of back film is not flush due to partial deletion of the cutting edge of the first part of back film; and a first portion of a back film and a second portion of a back film; the first part back film and the second part back film are arranged on the same surface of the bearing layer in a strippable side-by-side manner, a space is reserved between the first part back film and the second part back film, and the side surface of the first part back film, which is close to one side of the second part back film, is perpendicular to the surface of the first part back film, which is far away from the bearing layer. Used in flexible display devices.
Description
Technical Field
The invention relates to the technical field of display, in particular to a back film and a preparation method thereof, a flexible display device and a preparation method thereof, and a cutting die.
Background
The OLED (Organic Light-Emitting Diode) flexible display device has the advantages of small volume, portability, capability of realizing bending and folding, narrow frame and the like, so that the OLED (Organic Light-Emitting Diode) flexible display device becomes a mainstream development trend of the current display device.
The main structure of the flexible display device includes a back film, a flexible substrate, a flexible display panel, a control chip (Integrated Circuit, abbreviated as IC), and the like. In order to enable the flexible display device to achieve a narrower lower frame, a backing film in the flexible display device is arranged on the back surface of the flexible substrate, and one side of the attached IC is bent to the back surface of a flexible display Panel (Panel) usually in a Pad area bending (Pad bending) mode of the flexible substrate.
However, since the bending of the pad region of the flexible substrate is 180 degrees, the film layer in the flexible display panel is easily cracked and separated in the bending region, and in this case, removing the back film of the bending region of the flexible substrate may reduce bending stress and improve the occurrence of cracks, and the back film after removing part of the back film of the bending region is called a patterned back film.
Disclosure of Invention
The embodiment of the invention provides a back film, a preparation method thereof, a flexible display device, a preparation method thereof and a cutting die, which can solve the problem that the cutting edge of a first part of back film is not flush due to partial deletion of the cutting edge of the first part of back film.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in a first aspect, a back film is provided, comprising a carrier layer; and a first portion of a back film and a second portion of a back film; the first part back film and the second part back film are arranged on the same surface of the bearing layer in a strippable side-by-side manner, a space is reserved between the first part back film and the second part back film, and the side surface of the first part back film, which is close to one side of the second part back film, is perpendicular to the surface of the first part back film, which is far away from the bearing layer.
In some embodiments, a side of the second portion of the back film adjacent to a side of the first portion of the back film is perpendicular to a surface of the second portion of the back film remote from the carrier layer.
In some embodiments, further comprising: a third portion of the backing film; the third portion of the backing film is releasably disposed on the surface of the carrier layer and is positioned between the first portion of the backing film and the second portion of the backing film.
In a second aspect, a cutting die is provided, including: a first blade; the first blade has a first cutting edge; a second blade; the second blade is provided with a second blade, the second blade is fixedly connected with the first blade, and the first blade and the second blade are oppositely arranged along the thickness direction of the first blade; along the cutting direction of the first blade and the second blade, the side surface of the first blade, which is far away from the second blade, is a vertical surface, and the side surface of the first blade, which is close to the second blade, is an inclined surface.
In some embodiments, the side of the second blade away from the first blade is a vertical surface, and the side of the second blade near the first blade is a bevel.
In some embodiments, the first blade further comprises a first blade body, the second blade further comprises a second blade body, the first blade body is fixedly connected with the second blade body, the first blade edge is positioned at the front end of the first blade body, and the second blade edge is positioned at the front end of the second blade body; the side surface of the first blade body far away from the second blade body is parallel to or in the same plane with the side surface of the first blade edge far away from the second blade edge.
In some embodiments, the side of the second blade body remote from the first blade body is parallel to or in the same plane as the side of the second blade edge remote from the first blade edge.
In a third aspect, there is provided a flexible display device comprising: a display element; a flexible substrate; the display element is arranged on the flexible substrate, and the area of the flexible substrate where the display element is not arranged comprises: the part of the flexible substrate positioned in the folding area is folded to the back surface of the display element through the part positioned in the folding area; and a first portion of a back film and a second portion of a back film; the first part of back film and the second part of back film are arranged on the back surface of the flexible substrate; the side surface of the first part of the back film, which is close to one side of the bending area, is a vertical surface, and the boundary of the first part of the back film, which is close to one side of the bending area, is outside the boundary of the display element, which is close to one side of the bending area; alternatively, the boundary of the first portion of the back film on the side near the inflection region is aligned with the boundary of the display element on the side near the inflection region.
In some embodiments, a side of the second portion of the back film adjacent to the bending region is a vertical surface, and a boundary of the second portion of the back film adjacent to the bending region is outside a boundary of the display element adjacent to the bending region; alternatively, the border of the second portion of the back film adjacent to the inflection region is aligned with the border of the display element adjacent to the inflection region.
In a fourth aspect, a method for preparing a back film is provided, including: the backing film to be cut includes: the carrier layer and the layer to be cut are arranged on the carrier layer; placing the first blade and the second blade of the cutting die along the cutting direction and the surface of the layer to be cut, which is far away from the bearing layer; cutting the layer to be cut to form a back film, wherein the back film comprises: a first portion of a back film, a second portion of a back film, and a third portion of a back film disposed between the first portion of a back film and the second portion of a back film.
In some embodiments, the backing film comprises: the first part back film and the second part back film are provided with a space therebetween.
In a fifth aspect, there is provided a method of manufacturing a flexible display device, comprising: attaching a first part of back film and a second part of back film contained in the back film to one side of the flexible substrate, which is away from the display element; removing the bearing layer; folding the part of the flexible substrate located in the folding area to the back surface of the display element through the part located in the folding area; alternatively, removing a third portion of the backing film contained in the backing film; attaching a first portion of the back film from which the third portion of the back film is removed and a second portion of the back film to a side of the flexible substrate facing away from the display element; removing the bearing layer; and folding the part of the flexible substrate, which is positioned in the folding area, to the back surface of the display element through the part positioned in the folding area.
The embodiment of the invention provides a back film and a preparation method thereof, a flexible display device and a preparation method thereof, and a cutting die, wherein the back film comprises a bearing layer; and a first portion of a back film and a second portion of a back film; the first part back film and the second part back film are arranged on the same surface of the bearing layer in a strippable side-by-side manner, a distance is reserved between the first part back film and the second part back film, and the side surface of the first part back film, which is close to one side of the second part back film, is perpendicular to the surface of the first part back film, which is far away from the bearing layer. In the embodiment of the invention, the side surface of the first part of the back film close to the second part of the back film is vertical to the surface of the first part of the back film far away from the bearing layer, that is, the side surface of the first part of the back film close to the second part of the back film is a vertical surface, so that the side edges of the first part of the back film in the formed back film are flush.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a back film according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a back film according to the related art;
fig. 3 is a schematic structural diagram of a second back film according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a cutting die according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a cutting die provided in the related art;
fig. 6 is a schematic structural diagram of a related art cutting a back film to be cut using the cutting die shown in fig. 5;
fig. 7 is a schematic structural diagram of a cutting die according to a second embodiment of the present invention;
fig. 8 is a schematic structural diagram of cutting a back film to be cut by using the cutting die shown in fig. 7 according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a flexible display device before bending according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a flexible display device after bending according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a flexible display device according to an embodiment of the present invention;
fig. 12 is a schematic view of area division of a display panel according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display substrate according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a flexible display device before bending according to the related art;
fig. 15 is a schematic structural diagram of a flexible display device according to the related art after bending;
FIG. 16 is a schematic flow chart of a method for preparing a back film according to an embodiment of the present invention;
fig. 17 is a schematic flow chart of a method for manufacturing a flexible display device according to an embodiment of the present invention;
fig. 18 is a second schematic flow chart of the preparation of the flexible display device according to the embodiment of the invention.
Reference numerals:
011-a light emitting region; 012-non-light emitting region; 01-a display area; 02-peripheral region; 1-a frame; 2-cover glass; 3-a display panel; 4-a circuit board; 5-a control circuit; 10-backing film; 11-a carrier layer; 12-a cutting die; 13-a display element; 14-a flexible substrate; 31-a display substrate; 32-an encapsulation layer; 101-a first portion of a backing film; 102-a second portion of the backing film; 103 a third portion of the backing film; 121-a first blade; 122-a second blade; 141-a turnover zone; 142-inflection region; 310-a thin film transistor; 311-anode; 312-a light-emitting functional layer; 313-cathode; 314-a pixel defining layer; 315-a planar layer; 1211-a first blade; 1221-a second blade; 1212-a first blade; 1222-a second blade.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the present invention provides a back film 10, as shown in fig. 1, the back film 10 includes a carrier layer 11; and a first portion of the back film 101 and a second portion of the back film 102; the first part of back film 101 and the second part of back film 102 are arranged on the same surface of the bearing layer 11 in a strippable side-by-side manner, a space is reserved between the first part of back film 101 and the second part of back film 102, and the side surface of the first part of back film 101, which is close to the second part of back film 102, is perpendicular to the surface of the first part of back film, which is far away from the bearing layer 11.
It should be understood that the carrier layer 11 includes an upper surface and a lower surface, and the first portion of the back film 101 and the second portion of the back film 102 are disposed side by side on the same surface of the carrier layer 11, and it may be that the first portion of the back film 101 and the second portion of the back film 101 are disposed on the upper surface of the carrier layer 11 at the same time; it is also possible that the first portion of the back film 101 and the second portion of the back film 101 are simultaneously disposed on the lower surface of the carrier layer.
The material of the carrier layer 11 is not limited. By way of example, the material of the carrier layer 11 may be an organic material; or may be an inorganic material. Here, the organic material may be, for example, PMMA (Polymethyl methacrylate ); the inorganic material may be, for example, one or more of SiNx (silicon nitride), siOx (silicon oxide), or SiOxNy (silicon oxynitride).
The manner of disposing the first partial back film 101 and the second partial back film 102 on the carrier layer 11 is not limited, so that the first partial back film 101 and the second partial back film 101 can be peeled off from the surface of the carrier layer 11. In some embodiments, the first portion of the back film 101 and the second portion of the back film 101 are electrostatically bonded to the carrier layer 11. In other embodiments, the back film 10 further includes a glue film disposed between the carrier layer 11 and the first portion back film 101 and the second portion back film 102, and the first portion back film 101 and the second portion back film 102 are attached to the carrier layer 11 by the glue film. The adhesive film is not shown in fig. 1.
In the embodiment of the present invention, the materials of the first portion of the back film 101 and the second portion of the back film 102 are the same, and in this case, the materials of the first portion of the back film 101 and the second portion of the back film 102 are not limited. For example, the material of the first portion back film 101 and the second portion back film 102 may be one of a polyethylene terephthalate (Polyethylene terephthalate, abbreviated as PET), a Polyimide (Polyimide, abbreviated as PI), or a cyclic olefin polymer (Cyclo olefin polymer, abbreviated as COP).
The related art provides a back film 10, as shown in fig. 2, the back film 10 includes a carrier layer 11; and a first portion of the back film 101 and a second portion of the back film 102; the first part of back film 101 and the second part of back film 102 are arranged on the same surface of the bearing layer 11 in a strippable side-by-side manner, a space is reserved between the first part of back film 101 and the second part of back film 102, the side surface of the first part of back film 101, which is close to the second part of back film 102, is an inclined surface, and the side surface of the second part of back film 102, which is close to the first part of back film 101, is an inclined surface. Since the side of the first portion back film 101 on the side close to the second portion back film 102 in the related art is the inclined surface, the side of the second portion back film 102 on the side close to the first portion back film 101 is the inclined surface, that is, the side edge of the first portion back film 101 on the side close to the second portion back film 102 and the side edge of the second portion back film 102 on the side close to the first portion back film 101 may be partially missing, thus resulting in that the side edges of the first portion back film 101 and the second portion back film 102 in the back film 10 are not flush.
The embodiment of the invention provides a back film 10, wherein the back film 10 comprises a bearing layer 11; and a first portion of the back film 101 and a second portion of the back film 102; the first part of back film 101 and the second part of back film 102 are arranged on the same surface of the bearing layer 11 in a strippable side-by-side manner, a space is reserved between the first part of back film 101 and the second part of back film 102, and the side surface of the first part of back film 101, which is close to the second part of back film 102, is perpendicular to the surface of the first part of back film, which is far away from the bearing layer 11. In the embodiment of the invention, the side surface of the first portion of the back film 101 close to the second portion of the back film 102 is perpendicular to the surface of the first portion of the back film away from the carrier layer 11, that is, the side surface of the first portion of the back film 101 close to the second portion of the back film 102 is a vertical surface, so that the side edges of the first portion of the back film 101 in the formed back film 10 can be flush.
In some embodiments, as shown in fig. 1, the side of the second portion of the back film 102 near the side of the first portion of the back film 101 is perpendicular to the surface of the second portion of the back film 102 away from the carrier layer 11.
Since the side surface of the second portion of the back film 101 close to the first portion of the back film 102 is perpendicular to the surface of the second portion of the back film away from the carrier layer 11 in the embodiment of the present invention, that is, the side surface of the second portion of the back film 101 close to the first portion of the back film 102 is a vertical surface, the side surface of the second portion of the back film 101 close to the first portion of the back film 102 is not missing, so that the side edges of the first portion of the back film 101 and the second portion of the back film 102 of the formed back film 10 are even.
In some embodiments, as shown in fig. 3, the back film 10 further includes a third portion of the back film 103; the third portion of the back film 103 is releasably disposed on the surface of the carrier layer 11 and is located between the first portion of the back film 101 and the second portion of the back film 102.
Here, the third portion of the back film 103 is disposed on the same surface of the carrier layer 11 side by side with the first portion of the back film 101 and the second portion of the back film 102. On this basis, the third portion of the back film 103, the first portion of the back film 101, and the second portion of the back film 102 are all made of the same material, which is one of PET, PI, or COP.
The arrangement between the third portion of the back film 103 and the carrier layer 11 is not limited. The third portion of the back film 103 is disposed on the carrier layer 11 in the same manner as the first portion of the back film 101 and the second portion of the back film 102 are disposed on the carrier layer 11. Reference may be made to the above-mentioned arrangement of the first portion of the back film 101 and the second portion of the back film 102 on the carrier layer 11, which is not described herein.
The embodiment of the invention also provides a cutting die 12 for cutting the back film 10. As shown in fig. 4, the die 12 includes a first blade 121; the first blade 121 has a first cutting edge 1211; a second blade 122; the second blade 122 has a second blade 1221, the second blade 122 is fixedly connected to the first blade 121, and the first blade 1211 and the second blade 1221 are disposed opposite to each other in the thickness direction of the first blade 121; along the cutting direction of the first blade 1211 and the second blade 1221, the side surface of the first blade 1211 on the side away from the second blade 1221 is a vertical surface, and the side surface of the first blade 1211 on the side close to the second blade 1221 is an inclined surface.
It will be appreciated by those skilled in the art that since both the first and second blades 1211 and 1221 have blade angles, i.e., the side of the first blade 1211 that is distal from the second blade 1221 is angled with respect to the side of the first blade 1211 that is proximal to the second blade 1221, the side of the first blade 1211 that is proximal to the second blade 1221 is beveled when the side of the first blade 1211 that is distal from the second blade 1221 is a vertical surface. On this basis, the smaller the blade angle of the first and second blades 1211 and 1221, the sharper the first and second blades 1211 and 1221, and thus the smaller the force applied by the user during cutting of the first and second blades 1211 and 1221.
The manner in which the second blade 122 is fixedly connected to the first blade 121 is not limited. In some embodiments, the second blade 122 includes a second engagement portion, the first blade includes a first engagement portion, and the second blade 122 and the first blade 121 are fixedly connected to each other by the second engagement portion and the first engagement portion. In other embodiments, the second blade 122 and the first blade 121 are fixedly coupled by screws.
The related art provides a die 12, as shown in fig. 5, the die 12 includes a first blade 121; the first blade 121 has a first cutting edge 1211; a second blade 122; the second blade 122 has a second blade 1221, the second blade 122 is fixedly connected to the first blade 121, and the first blade 1211 and the second blade 1221 are disposed opposite to each other in the thickness direction of the first blade 121; along the cutting direction of the first blade 1211 and the second blade 1221, the side surface of the first blade 1211 on the side away from the second blade 1221 is an inclined surface, and the side surface of the first blade 1211 on the side close to the second blade 1221 is an inclined surface; the side surface of the second blade 1221 on the side away from the first blade 1211 is a bevel, and the side surface of the second blade 1221 on the side close to the first blade 1211 is a bevel. Since in the related art, along the cutting direction of the first blade 1211 and the second blade 1221, the side of the first blade 1211 on the side away from the second blade 1221 is a bevel, and the side of the first blade 1211 on the side close to the second blade 1221 is a bevel; the side surface of the second blade 1221, which is far from the first blade 1211, is inclined, and the side surface of the second blade 1221, which is near to the first blade 1211, is inclined, so that after the back film to be cut is cut by the die 12 provided in the related art, the side surface edge of the formed back film 10, which is near to the second portion back film 102, of the first portion back film 101, and the side surface edge of the second portion back film 102, which is near to the first portion back film 101, each have a part of oblique cutting marks, which results in that the cut edge of the first portion back film 101, which is near to the second portion back film 102, and the cut edge of the second portion back film 102, which is near to the first portion back film 101, are not flush.
Referring to fig. 6, the cut edges of the first portion of the back film 101 and the second portion of the back film 102 are affected by the cutting of the cutting die 12, and there is a part of oblique cutting marks, and the film layers of the side surface of the first portion of the back film 101 near the side of the second portion of the back film 102 near the side of the first portion of the back film 101 are partially missing. As shown in fig. 6, the oblique cutting mark L at the side edge of the first partial back film 101 on the side close to the second partial back film 102 and the side edge of the second partial back film 102 on the side close to the first partial back film 101 ranges from 30um to 70um.
The embodiment of the invention provides a cutting die 12, wherein the cutting die 12 comprises a first blade 121; the first blade 121 has a first cutting edge 1211; a second blade 122; the second blade 122 has a second blade 1221, the second blade 122 is fixedly connected to the first blade 121, and the first blade 1211 and the second blade 1221 are disposed opposite to each other in the thickness direction of the first blade 121; along the cutting direction of the first blade 1211 and the second blade 1221, the side surface of the first blade 1211 on the side away from the second blade 1221 is a vertical surface, and the side surface of the first blade 1211 on the side close to the second blade 1221 is an inclined surface. Since the cutting die 12 provided in the embodiment of the present invention is a vertical surface on the side of the first cutting edge 1211 away from the second cutting edge 1221 along the cutting direction of the first cutting edge 1211 and the second cutting edge 1221, the side of the first cutting edge 1211 near the second cutting edge 1221 is an inclined surface, so that after the cutting die 12 provided in the embodiment of the present invention is used to cut the back film to be cut, the cutting mark of the side edge of the first portion back film 101 is vertical, and thus the side of the formed back film 10 on the side of the first portion back film 101 near the second portion back film 102 is a vertical surface, so that the side edge of the first portion back film 101 near the second portion back film 102 is flush.
In some embodiments, as shown in fig. 4, the side of the second blade 1221 away from the first blade 1211 is a vertical surface, and the side of the second blade 1221 near the first blade 1211 is a bevel.
In the embodiment of the present invention, since the side surface of the second blade 1221, which is far from the first blade 1211, is a vertical surface along the cutting direction of the first blade 1211 and the second blade 1221, the side surface of the second blade 1221, which is near to the first blade 1211, is a bevel, after the cutting die 12 provided by the embodiment of the present invention is used to cut the back film to be cut, the side surface of the second portion back film 102, which is near to the first portion back film 101, of the formed back film 10 is a vertical surface, so that the edge of the side surface of the second portion back film 102, which is near to the first portion back film 101, can be flush.
Referring to fig. 8, after the cutting die 12 provided in the embodiment of the present invention is used to cut the back film to be cut, the cut edges of the first portion back film 101 and the second portion back film 102 of the formed back film 10 are vertical, and the film layers of the side surface of the first portion back film 101 near the second portion back film 102 and the side surface edge of the second portion back film 102 near the first portion back film 101 are complete.
As shown in fig. 7, the first blade 121 further includes a first blade body 1212, the second blade 122 further includes a second blade body 1222, the first blade body 1212 is fixedly connected to the second blade body 1222, a first blade 1211 is located at a front end of the first blade body 1212, and a second blade 1221 is located at a front end of the second blade body 1222; the side of the first blade body 1212 remote from the second blade body 1222 is parallel to or in the same plane as the side of the first blade edge 1211 remote from the second blade edge 1221.
The manner in which the first blade 1212 and the second blade 1222 are fixedly connected is not limited. In some embodiments, the first blade 1212 includes a first snap feature and the second blade 1222 includes a second snap feature, the first blade 1212 and the second blade 1222 being fixedly coupled to each other by the first and second snap features. In other embodiments, the first blade 1212 and the second blade 1222 are fixedly attached by screws.
Note that, the first and second blades 1211 and 1221 are used to cut the back film to be cut, and when the first and second blades 1211 and 1221 are placed perpendicular to the back film to be cut, the first and second blades 1211 and 1221 are close to the upper surface of the back film to be cut, and the first and second blades 1212 and 1222 are used to fix the first and second blades 1211 and 1221 to cut the back film to be cut, so the first and second blades 1211 and 1221 are disposed at the front ends of the first and second blades 1212 and 1222. And rear ends of the first blade 1212 and the second blade 1222 are used to fixedly connect the first blade 121 and the second blade 122 to form the cutting die 12.
Here, in the case where the side surface of the first blade 1212 on the side away from the second blade 1222 is parallel to the side surface of the first blade 1211 on the side away from the second blade 1221, the boundary of the side surface edge of the first blade 1212 on the side away from the second blade 1222 may be out of the boundary of the side surface edge of the first blade 1211 on the side away from the second blade 1221; the boundary of the side edge of the first blade 1212 on the side away from the second blade 1222 may be within the boundary of the side edge of the first blade 1211 on the side away from the second blade 1221. In the case where the side surface of the first blade body 1212 on the side remote from the second blade body 1222 is in the same plane as the side surface of the first blade edge 1211 on the side remote from the second blade edge 1221, the boundary of the side surface edge of the first blade body 1212 on the side remote from the second blade body 1222 is aligned with the boundary of the side surface edge of the first blade edge 1211 on the side remote from the second blade edge 1221.
In some embodiments, as shown in fig. 7, the side of the second blade 1222 that is distal from the first blade 1212 is parallel to or in the same plane as the side of the second blade 1221 that is distal from the first blade 1211.
Here, in the case where the side surface of the second blade 1222 on the side away from the first blade 1212 is parallel to the side surface of the second blade 1221 on the side away from the first blade 1211, the boundary of the side surface edge of the second blade 1222 on the side away from the first blade 1212 may be out of the boundary of the side surface edge of the second blade 1221 on the side away from the first blade 1211; the boundary of the side edge of the second blade 1222 on the side away from the first blade 1212 may be within the boundary of the side edge of the second blade 1221 on the side away from the first blade 1211. In the case where the side surface of the second blade 1222 on the side away from the first blade 1212 is in the same plane as the side surface of the second blade 1221 on the side away from the first blade 1211, the boundary of the side edge of the second blade 1222 on the side away from the first blade 1212 is aligned with the boundary of the side edge of the second blade 1221 on the side away from the first blade 1211.
In the embodiment of the invention, since the side surface of the first blade body 1212 far from the second blade body 1222 is parallel to or in the same plane as the side surface of the first blade 1211 far from the second blade 1221, the side surface of the second blade body 1222 far from the first blade body 1212 is parallel to or in the same plane as the side surface of the second blade 1221 far from the first blade 1211, so that the appearance of the first blade 121 formed by the first blade 1211 and the first blade body 1212 and the appearance of the second blade 122 formed by the second blade 1221 and the second blade body 1222 are attractive, when the back film to be cut is cut by using the above-mentioned blade die 12, the force applied by the user can be fully applied to the back film to be cut in the cutting direction, thereby reducing the force applied by the user in the cutting process and facilitating the cutting.
The embodiment of the invention also provides a flexible display device, as shown in fig. 9 and 10, comprising a display element 13; a flexible substrate 14; the display element 13 is provided on the flexible substrate 14, and a region of the flexible substrate 14 where the display element 13 is not provided includes: the folding region 141 and the folding region 142, and a portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 through a portion located in the folding region 142; and a first portion of the back film 101 and a second portion of the back film 102; the first portion of the back film 101 and the second portion of the back film 102 are disposed on the back surface of the flexible substrate 14; the side surface of the first part of the back film 101, which is close to the bending area 142, is a vertical surface, and the boundary of the first part of the back film 101, which is close to the bending area 142, is outside the boundary of the display element 13, which is close to the bending area 142; alternatively, the boundary of the first portion of the back film 101 on the side near the inflection region 142 is aligned with the boundary of the display element 13 on the side near the inflection region 142.
The flexible display device provided by the embodiment of the invention is an electroluminescent display device, which can be an Organic Light-Emitting Diode Display (OLED) or a quantum dot electroluminescent display device (Quantum Dot Light Emitting Diodes Display, QLED).
As shown in fig. 11, the main structure of the flexible display device further includes other accessories such as a frame 1, a cover glass 2, a display Panel (Panel) 3, a circuit board 4, and a control circuit 5.
Wherein, the longitudinal section of frame 1 is U type, and display panel 3, circuit board 4 and other accessories all set up in frame 1, and circuit board 4 sets up in the below of display panel 3, and cover glass 2 sets up in the one side that display panel 3 kept away from circuit board 4. As shown in fig. 11, the control circuit 5 is provided on the extending side of the display panel 3.
As shown in fig. 12, the display panel 3 includes a display area 01 and a peripheral area 02 located on at least one side of the display area 01, and fig. 12 is a schematic view of the peripheral area 02 surrounding the display area 01. The display region 01 includes a plurality of light-emitting regions 011 and a non-light-emitting region 012 for defining the plurality of light-emitting regions 011. The peripheral region 02 is used for wiring, and a gate driver circuit may be provided in the peripheral region 02.
Here, the control circuit 5 may be, for example, a control chip IC, and the control circuit 5 is located in the peripheral region 02 of the display panel 3. On this basis, the area of the flexible substrate 14 where the display element 13 is not provided is a peripheral area 02, and the peripheral area 02 includes a folded-over area 141 and a folded-over area 142. As illustrated in fig. 9 and 10, the control circuit 5 is located in the folding area 141, and the control circuit 5 is folded to the back surface of the display element 13 through a portion located in the folding area 142.
It should be noted that, the pad area is an area where the electrodes on the array substrate are connected to the control circuit 5, and in the flexible display device provided in the embodiment of the present invention, the pad area includes a folding area 141 and a bending area 142.
It should be understood that the display elements 13 are located in the light-emitting regions 011 in the display region 01 of the display panel 3, one display element 13 is correspondingly disposed in one light-emitting region 011, and the display element 13 is configured to emit light. On this basis, the display element 13 is located on one surface of the flexible substrate 14, which is the front surface of the flexible substrate 14, and the other surface of the flexible substrate 14, which is the back surface of the flexible substrate 14. As shown in fig. 9 and 10, a first portion of the back film 101 and a second portion of the back film 102 are provided on the back surface of the flexible substrate 14.
The flexible display device provided by the embodiment of the invention is an electroluminescent display device, and the display panel 3 of the electroluminescent display device is an electroluminescent display panel. As shown in fig. 13, the main structure of the electroluminescent display panel includes a display substrate 31 and an encapsulation layer 32 for encapsulating the display substrate 31. Here, the encapsulation layer 32 may be an encapsulation film or an encapsulation substrate.
As shown in fig. 13, the display substrate 31 includes a plurality of display elements 13, the plurality of display elements 13 includes a light emitting device and a driving circuit provided on a flexible substrate 14, and the driving circuit includes a plurality of thin film transistors 310. The light emitting device includes an anode 311, a light emitting function layer 312, and a cathode 313, and the anode 311 is electrically connected to a drain electrode of the thin film transistor 310, which is a driving transistor, among the plurality of thin film transistors 310. The display substrate 31 further includes a pixel defining layer 314, and the pixel defining layer 314 includes a plurality of opening regions in which one light emitting device is disposed. In some embodiments, the light emitting functional layer 312 includes a light emitting layer. In other embodiments, the light emitting functional layer 312 includes one or more of an electron transport layer (election transporting layer, ETL), an electron injection layer (election injection layer, EIL), a hole transport layer (hole transporting layer, HTL), and a hole injection layer (hole injection layer, HIL) in addition to the light emitting layer.
As shown in fig. 13, the display substrate 31 further includes a flat layer 315 provided between the driving circuit and the anode 311.
It will be appreciated by those skilled in the art that in order to achieve a narrower lower bezel for a flexible display device, it is common to bend the fold-over region of the flexible substrate 14 to the back of the flexible display panel, and in some embodiments, as shown in fig. 9 and 10, the control circuit 5 is disposed in the fold-over region of the flexible substrate 14, thus bending one side of the flexible substrate 14 that is attached to the control circuit 5 to the back of the flexible display panel.
The related art provides a flexible display device, as shown in fig. 14 and 15, including a display element 13; a flexible substrate 14; the display element 13 is provided on the flexible substrate 14, and a region of the flexible substrate 14 where the display element 13 is not provided includes: the folding region 141 and the folding region 142, and a portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 through a portion located in the folding region 142; and a first portion of the back film 101 and a second portion of the back film 102; the first portion of the back film 101 and the second portion of the back film 102 are disposed on the back surface of the flexible substrate 14; the side of the first portion of the back film 101 near the bending region 142 is inclined. Since the side of the first portion of the back film 101 near the bending region 142 in the flexible display device of the related art is an inclined plane, when the control circuit 5 located in the folding region 141 in the flexible display device is bent, the portion of the bending region 142 of the flexible substrate 14 is close to the inclined plane of the first portion of the back film 101 near the bending region 142, resulting in insufficient supporting force of the lower portion of the flexible substrate 14, and thus the bending morphology of the bending region 142 is deformed, and the film layer between the display element 13 and the flexible substrate 14 is separated.
The embodiment of the invention provides a flexible display device, which comprises a display element 13; a flexible substrate 14; the display element 13 is provided on the flexible substrate 14, and a region of the flexible substrate 14 where the display element 13 is not provided includes: the folding region 141 and the folding region 142, and a portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 through a portion located in the folding region 142; and a first portion of the back film 101 and a second portion of the back film 102; the first portion of the back film 101 and the second portion of the back film 102 are disposed on the back surface of the flexible substrate 14; the side surface of the first part of the back film 101, which is close to the bending area 142, is a vertical surface, and the boundary of the first part of the back film 101, which is close to the bending area 142, is outside the boundary of the display element 13, which is close to the bending area 142; alternatively, the boundary of the first portion of the back film 101 on the side near the inflection region 142 is aligned with the boundary of the display element 13 on the side near the inflection region 142. Because the side surface of the first portion of the back film 101 near the bending region 142 in the flexible display device provided by the embodiment of the invention is a vertical surface, the boundary of the first portion of the back film 101 near the bending region 142 is outside the boundary of the display element 13 near the bending region 142; alternatively, the boundary of the first portion of the back film 101 near the bending region 142 is aligned with the boundary of the display element 13 near the bending region 142, and when the control circuit 5 located in the folding region 141 is bent in the flexible display device, the lower supporting force of the flexible substrate 14 is uniform, so that a good bending shape can be ensured, that is, the bending shape of the bending region 142 is circular arc, and the separation of the film layer between the display element 13 and the flexible substrate 14 is avoided.
In some embodiments, as shown in fig. 9 and 10, the side of the second portion of the back film 102 near the bending region 142 is a vertical surface, and the boundary of the second portion of the back film 102 near the bending region 142 is outside the boundary of the display element 13 near the bending region 142; alternatively, the border of the second portion of the backing film 102 near the inflection region 142 is aligned with the border of the display element 13 near the inflection region 142.
In the embodiment of the present invention, since the side surface of the second portion of the back film 102 near the bending region 142 is a vertical surface, the boundary of the second portion of the back film 102 near the bending region 142 is outside the boundary of the display element 13 near the bending region 142; or, the boundary of the second portion of the back film 102 near the bending region 142 is aligned with the boundary of the display element 13 near the bending region 142, when the control circuit 5 located in the folding region 141 in the flexible display device is bent, the lower supporting force of the flexible substrate 14 can be further made uniform, and a good bending morphology is ensured, that is, the bending morphology of the bending region 142 is circular arc, so that the separation of the film layer between the display element 13 and the flexible substrate 14 is further avoided.
The embodiment of the invention also provides a preparation method of the back film 10, wherein the back film to be cut comprises: a carrier layer 11 and a layer to be cut provided on the carrier layer 11; as shown in fig. 16, the method of preparing the back film 10 includes:
s100, the first blade 1211 and the second blade 1212 of the cutting die 12 are placed perpendicular to the surface of the layer to be cut, which is far from the bearing layer, along the cutting direction.
S101, cutting a layer to be cut to form a back film 10; the back film 10 includes: a first portion of the back film 101, a second portion of the back film 102, and a third portion of the back film 103 disposed between the first portion of the back film 101 and the second portion of the back film 102.
Here, the thickness of the carrier layer 11 is greater than the thickness of the layer to be cut, the layer to be cut is cut by the first blade 1211 and the second blade 1212 of the cutting die 12, and the carrier layer 11 is not cut as a whole because the thickness of the carrier layer 11 is greater than the thickness of the layer to be cut.
For the materials of the first portion of the back film 101, the second portion of the back film 102, and the third portion of the back film 103, reference may be made to the above embodiments, and the details are not repeated here.
In addition, the method for preparing the back film 10 in S101 includes:
s1011, the back film 10 includes: a first portion of the back film 101 and a second portion of the back film 102, the first portion of the back film 101 and the second portion of the back film 102 having a space therebetween.
Here, when forming the back film 10 in step S1011, the third portion of the back film 103 in step S101 may be removed.
In the embodiment of the present invention, the preparation method of the back film 10 has the same technical effects as the back film 10 in the above embodiment, and reference may be made to the technical effects of the back film 10 in the above embodiment, which are not described herein.
The embodiment of the invention also provides a preparation method of the flexible display device, as shown in fig. 17 and 18, comprising the following steps:
s200, attaching the back film 10 formed in the step S101 to the flexible substrate 14 at a side facing away from the display element 13.
S201, removing the carrier layer 11.
S202, the portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 through the portion located in the folding region 142.
Or alternatively;
s300, removing the third portion of the back film 103 included in the back film 10.
S301, the back film 10 from which the third portion of the back film 103 is removed is attached to the flexible substrate 14 on the side facing away from the display element 13.
S302, removing the bearing layer 11.
S303, the portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 by the portion located in the folding region 142.
Referring to fig. 9, it can be seen that when the flexible substrate 14 is not bent, the back film 10 including the first portion back film 101 and the second portion back film 102 is attached to the side of the flexible substrate 14 facing away from the display element 13, where the first portion back film 101 and the display element 13 are respectively disposed on two opposite sides of the flexible substrate 14, the second portion back film 102 and the control circuit 5 are respectively disposed on two opposite sides of the flexible substrate 14, the space between the first portion back film 101 and the second portion back film 102 is a portion of the bending region 142 of the flexible substrate 14, and the portion of the control circuit 5 and the second portion back film 102 located on the flexible substrate 14 is a portion of the folding region 141. The portion of the flexible substrate 14 located in the folding region 141 is folded to the back surface of the display element 13 through the portion located in the folding region 142, i.e., the flexible display device as shown in fig. 10 is formed.
Referring to fig. 10, it can be seen that, since the first portion of the back film 101 and the second portion of the back film 102 are vertical surfaces on the side near the bending region 142, the supporting force of the flexible substrate 14 during bending can be made uniform, and a good bending morphology is ensured, so that separation of the film layer between the display element 13 and the flexible substrate 14 during bending can be avoided.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. A cutting die for producing a back film, comprising:
a first blade; the first blade has a first cutting edge;
a second blade; the second blade is provided with a second blade, the second blade is fixedly connected with the first blade, and the first blade and the second blade are oppositely arranged along the thickness direction of the first blade;
along the cutting direction of the first blade and the second blade, the side surface of the first blade, which is far away from the second blade, is a vertical surface, and the side surface of the first blade, which is close to the second blade, is an inclined surface.
2. The die of claim 1, wherein the side of the second blade away from the first blade is a vertical surface and the side of the second blade closer to the first blade is a bevel.
3. The die of claim 1, wherein the first blade further comprises a first blade body, the second blade further comprises a second blade body, the first blade body is fixedly connected with the second blade body, the first blade edge is positioned at the front end of the first blade body, and the second blade edge is positioned at the front end of the second blade body;
the side surface of the first blade body far away from the second blade body is parallel to or in the same plane with the side surface of the first blade edge far away from the second blade edge.
4. A cutting die according to claim 3 wherein the side of the second blade body remote from the first blade body is parallel or in the same plane as the side of the second blade edge remote from the first blade edge.
5. A method of making a backing film comprising:
the backing film to be cut includes: the carrier layer and the layer to be cut are arranged on the carrier layer;
placing the first blade and the second blade of the cutting die of any one of claims 1 to 4 perpendicularly to the surface of the layer to be cut on the side away from the carrier layer in the cutting direction;
cutting the layer to be cut to form a back film, wherein the back film comprises: a first portion of a back film, a second portion of a back film, and a third portion of a back film disposed between the first portion of a back film and the second portion of a back film.
6. The method of manufacturing according to claim 5, wherein the back film comprises: the first part back film and the second part back film are provided with a space therebetween.
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| CN202010002060.2A CN111162203B (en) | 2020-01-02 | 2020-01-02 | Back film and preparation method thereof, flexible display device and preparation method thereof, and cutting die |
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| CN111162203B true CN111162203B (en) | 2023-10-31 |
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| CN110828505B (en) * | 2018-07-23 | 2022-06-07 | 京东方科技集团股份有限公司 | Manufacturing method and manufacturing device of flexible panel |
| CN111863886B (en) * | 2020-07-02 | 2023-04-18 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel, flexible display panel manufacturing method and display device |
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| CN106653777A (en) * | 2017-03-22 | 2017-05-10 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof |
| CN107665854A (en) * | 2017-09-21 | 2018-02-06 | 京东方科技集团股份有限公司 | Notacoria structure and preparation method thereof, flexible display screen |
| CN108538762A (en) * | 2018-04-24 | 2018-09-14 | 京东方科技集团股份有限公司 | Display master blank and preparation method, display base plate and preparation method, display device |
| CN108986664A (en) * | 2018-07-18 | 2018-12-11 | 京东方科技集团股份有限公司 | Flexible display panels and manufacturing method, flexible display apparatus and manufacturing method |
| CN109873020A (en) * | 2019-03-19 | 2019-06-11 | 京东方科技集团股份有限公司 | It is bonded membrane material, display panel, display device, the preparation method of display panel |
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| CN106653777A (en) * | 2017-03-22 | 2017-05-10 | 京东方科技集团股份有限公司 | Display panel and preparation method thereof |
| CN107665854A (en) * | 2017-09-21 | 2018-02-06 | 京东方科技集团股份有限公司 | Notacoria structure and preparation method thereof, flexible display screen |
| CN108538762A (en) * | 2018-04-24 | 2018-09-14 | 京东方科技集团股份有限公司 | Display master blank and preparation method, display base plate and preparation method, display device |
| CN108986664A (en) * | 2018-07-18 | 2018-12-11 | 京东方科技集团股份有限公司 | Flexible display panels and manufacturing method, flexible display apparatus and manufacturing method |
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