CN111129086A - Flexible display panel and manufacturing method thereof - Google Patents
Flexible display panel and manufacturing method thereof Download PDFInfo
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- CN111129086A CN111129086A CN201911279891.8A CN201911279891A CN111129086A CN 111129086 A CN111129086 A CN 111129086A CN 201911279891 A CN201911279891 A CN 201911279891A CN 111129086 A CN111129086 A CN 111129086A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 239000000758 substrate Substances 0.000 claims abstract description 190
- 238000005452 bending Methods 0.000 claims abstract description 52
- 230000003139 buffering effect Effects 0.000 claims abstract description 10
- 239000010408 film Substances 0.000 claims description 58
- 239000004973 liquid crystal related substance Substances 0.000 claims description 24
- 238000004806 packaging method and process Methods 0.000 claims description 15
- 239000011521 glass Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 229920001721 polyimide Polymers 0.000 claims description 12
- 239000010409 thin film Substances 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000008020 evaporation Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 230000001678 irradiating effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001723 curing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
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- 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
-
- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- 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
- G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
- G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
- G02F1/133723—Polyimide, polyamide-imide
Abstract
The invention provides a flexible display panel and a manufacturing method thereof. The flexible display panel is provided with a plane area and curved surface bending areas positioned on two sides of the plane area, and comprises a first flexible substrate layer and an array substrate; two ends of one surface of the first flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending areas and used for buffering stress when the curved surface bending areas are bent; the array substrate is arranged on one side, away from the pre-stretching concave-convex structure, of the first flexible substrate layer. According to the invention, the pre-stretching concave-convex structure is arranged at the position corresponding to the curved surface bending region, so that the stress borne by the flexible display panel at the bending position can be effectively reduced, and the risk of poor function or appearance of the flexible display panel at the curved surface bending region is effectively reduced.
Description
Technical Field
The invention relates to the field of display, in particular to a flexible display panel and a manufacturing method thereof.
Background
With the rapid development of smart phones, the homogenization of the smart phones is more and more serious, and particularly, the smart phones are almost 2D flat panel display screen structures in the aspect of displaying appearance and shape; the structure of the display screen module is generally formed by attaching 2D plane glass and a 2D rigid liquid crystal display panel or an organic light emitting diode display panel.
As the 'full screen' mobile phone is more and more popular with customers, the requirement for the screen ratio of the whole mobile phone touch display module is higher and higher; and similar to the 3D hyperbolic screen adopted by device models such as a Samsung Galaxy series or a Note series, or a future quadric screen, the screen occupation ratio can be further improved compared with that of a traditional 2D flat display screen. And when the curved screen is used for a mobile phone, the whole curved design of the curved screen is beneficial to being held by a user and better attached to the arch of the hand. The curved screen also increases the angle of visibility, so the effect is good even when viewed at an off-center angle.
Due to the flexibility and the flexibility of the flexible liquid crystal display panel or the organic light emitting diode display panel, the flexible liquid crystal display panel or the organic light emitting diode display panel can be widely applied to various molded electronic equipment products, such as a curved television, a 3D curved smart watch, a 3D curved smart phone, even a foldable wrist strap, a future foldable smart phone and the like.
However, in general, in the process of bonding the flexible liquid crystal display panel or the organic light emitting diode display panel to the uppermost 3D curved glass, a tensile force or a compressive stress inevitably occurs in the flexible display at a bent portion, and thus the flexible liquid crystal display panel or the organic light emitting diode display panel is stretched or compressed to be damaged, or appearance defects such as bonding bubbles or peeling are generated.
Therefore, how to reduce the stress borne by the flexible liquid crystal display panel or the organic light emitting diode display panel at the bending part in the 3D display module becomes a technical problem that needs to be solved.
Disclosure of Invention
The invention aims to provide a flexible display panel and a manufacturing method thereof, wherein a pre-stretching concave-convex structure is arranged at a position corresponding to a curved surface bending area and is used for buffering stress when the curved surface bending area is bent, so that the stress borne by the flexible display panel at the bending position can be effectively reduced, and the risk of poor function or appearance of the flexible display panel in the curved surface bending area is effectively reduced.
In order to solve the above problems, the present invention provides a flexible display panel, which is provided with a planar area and curved bending areas located at two sides of the planar area, wherein the flexible display panel includes a first flexible substrate layer and an array substrate; two ends of one surface of the first flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending areas and used for buffering stress when the curved surface bending areas are bent; the array substrate is arranged on one side, away from the pre-stretching concave-convex structure, of the first flexible substrate layer.
Further, the pre-stretching concave-convex structure comprises a plurality of protrusions and depressions which are arranged adjacently, and the protrusions and the depressions are connected end to form the wavy concave-convex grains.
Furthermore, the flexible display panel also comprises a color film substrate, a liquid crystal layer, an upper polarizer, a lower polarizer and a flexible backlight module; specifically, the color film substrate is arranged opposite to the array substrate; the liquid crystal layer is arranged between the color film substrate and the array substrate; the upper polaroid is arranged on one side of the color film substrate, which is deviated from the array substrate; the lower polarizer is arranged on one side of the array substrate, which is far away from the color film substrate; the flexible backlight module is arranged on one side of the lower polarizer, which is deviated from the array substrate.
Further, the color film substrate comprises a second flexible substrate layer and a color film layer; two ends of one surface of the second flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending areas; the color film layer is arranged on one side, away from the pre-stretching concave-convex structure, of the second flexible substrate layer, and comprises red pixel units, green pixel units and blue pixel units.
Furthermore, the flexible display panel further comprises a light emitting layer, a thin film packaging layer and an upper polarizer; specifically, the light-emitting layer is arranged on one side of the array substrate, which is far away from the first flexible substrate layer, and comprises a red pixel subunit, a green pixel subunit and a blue pixel subunit; the thin film packaging layer is arranged on one side of the light emitting layer, which is deviated from the array substrate; the upper polaroid is arranged on one side, deviating from the light emitting layer, of the film packaging layer.
Furthermore, the flexible display panel further comprises a glass cover plate arranged on one side of the array substrate, which deviates from the first flexible substrate layer.
The invention also provides a manufacturing method of the flexible display panel, which comprises the following steps:
the manufacturing method comprises the steps of manufacturing a first flexible substrate layer, providing a rigid substrate, wherein the rigid substrate is provided with a plane area and curved surface bending areas positioned on two sides of the plane area, concave-convex structures are arranged at the positions corresponding to the curved surface bending areas, a polyimide film layer is manufactured on the rigid substrate in a mode of coating a polyimide solution and irradiating or thermally curing by ultraviolet light, and pre-stretching concave-convex structures are formed on the polyimide film layer corresponding to the concave-convex structures and used for buffering stress when the curved surface bending areas are bent; the polyimide film layer is stripped from the rigid substrate in a laser stripping mode to form the first flexible substrate layer; and
and manufacturing an array substrate, namely manufacturing the array substrate on one side of the first flexible substrate layer, which is deviated from the pre-stretching concave-convex structure.
Further, after the step of manufacturing the array substrate, the method further comprises the following steps:
manufacturing a color film substrate, wherein the color film substrate comprises a second flexible substrate layer and a color film layer, both ends of one surface of the second flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending regions, the color film layer is arranged on one side of the second flexible substrate layer, which is deviated from the pre-stretching concave-convex structures, and the color film layer comprises red pixel units, green pixel units and blue pixel units;
a step of manufacturing a liquid crystal layer, in which the color film substrate and the array substrate are arranged oppositely, and liquid crystal is filled between the color film substrate and the array substrate to form the liquid crystal layer;
attaching a polarizer, namely attaching a polarizer to one side of the color film substrate, which is far away from the array substrate;
attaching a lower polarizer, namely attaching the lower polarizer to one side of the array substrate, which is far away from the color film substrate; and
and assembling a flexible backlight module, namely assembling the flexible backlight module on one side of the lower polarizer, which is far away from the array substrate.
Further, after the step of manufacturing the array substrate, the method further comprises the following steps:
manufacturing a light emitting layer, namely manufacturing the light emitting layer on one side of the array substrate, which is far away from the first flexible substrate layer, in an evaporation mode, wherein the light emitting layer comprises a red pixel subunit, a green pixel subunit and a blue pixel subunit;
manufacturing a thin film packaging layer, namely manufacturing the thin film packaging layer on one side of the light-emitting layer, which is far away from the array substrate; and
and attaching a polarizer, namely attaching a polarizer to one side of the film packaging layer, which is deviated from the light-emitting layer.
Further, after the step of manufacturing the array substrate, the method further comprises the following steps:
and attaching a glass cover plate, wherein the glass cover plate is attached to one side of the array substrate, which deviates from the first flexible substrate layer.
The flexible display panel comprises a first flexible substrate layer, wherein pre-stretching concave-convex structures are arranged at two ends of one surface of the first flexible substrate layer at positions corresponding to the curved surface bending regions and used for buffering stress when the curved surface bending regions are bent, and the structures can effectively reduce stress borne by the flexible display panel at the bending positions, so that the risk of poor function or appearance of the flexible display panel in the curved surface bending regions is effectively reduced.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a flexible display panel according to a first embodiment of the present invention;
FIG. 2 is a top view of the first flexible substrate layer prior to bending;
FIG. 3 is a bottom view of the first flexible substrate layer prior to bending;
FIG. 4 is a schematic view of the first flexible substrate layer after bending;
FIG. 5 is a force analysis diagram of the pre-stretched concavo-convex structure;
fig. 6 is a schematic structural diagram of the flexible display panel after being bent;
fig. 7 is a schematic structural diagram of a flexible display panel according to a second embodiment of the present invention;
FIG. 8 is a flowchart illustrating a method for fabricating a flexible display panel according to an embodiment of the present invention;
fig. 9 is a flowchart of a manufacturing method for manufacturing a flexible display panel as a liquid crystal display panel according to an embodiment of the present invention;
fig. 10 is a flowchart of a manufacturing method for manufacturing the flexible display panel as an organic light emitting diode display panel in the embodiment of the present invention.
The components in the figure are identified as follows:
1. the flexible display panel comprises a first flexible substrate layer, a second flexible substrate layer, a first flexible substrate layer, a second flexible substrate layer, a first flexible substrate layer, a second flexible display panel, a first flexible substrate layer, a second flexible substrate layer.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
Referring to fig. 1, a flexible display panel 100 provided in a first embodiment of the present invention includes a planar area 101 and curved bending areas 102 located at two sides of the planar area 101, where the flexible display panel 100 includes a first flexible substrate layer 1 and an array substrate 2; two ends of one surface of the first flexible substrate layer 1 are provided with pre-stretching concave-convex structures 10 at positions corresponding to the curved surface bending area 102, and the pre-stretching concave-convex structures are used for buffering stress when the curved surface bending area 102 is bent; the array substrate 2 is arranged on one side, away from the pre-stretching concave-convex structure, of the first flexible substrate layer 1. The pre-stretched concave-convex structure 10 can effectively reduce the stress borne by the flexible display panel 100 at the bending position, thereby effectively reducing the risk of poor function or appearance of the flexible display panel 100 in the curved bending area 102.
Fig. 2 is a top view of the first flexible substrate layer 1 before being bent; fig. 3 is a bottom view of the first flexible substrate layer 1 before being bent; fig. 4 is a schematic structural view of the first flexible substrate layer 1 after being bent; the pre-stretching concave-convex structure 10 comprises a plurality of protrusions 11 and depressions 12 which are adjacently arranged, and the protrusions 11 and the depressions 12 are connected end to form wavy concave-convex patterns. Specifically, the thickness of first flexible substrate layer 1 is 10um-20um, the height of arch 11 is 5um-10um, sunken 12's degree of depth is 5um-10 um.
Referring to fig. 5, which is a schematic diagram of a stress analysis of the pre-stretched concavo-convex structure 10, since the outer side surface of the pre-stretched concavo-convex structure 10 is a curved surface and is not perpendicular to the stress F applied to the side edge, the stress F can be decomposed into two component forces F1 and F2 which face other directions and are both smaller than the stress, and the pre-stretched concavo-convex structure 10 is a curved wave shape, so that the actual length is long, the stress borne by the flexible display panel 100 at the curved position can be reduced, and the risk of poor function or appearance of the flexible display panel 100 at the curved bending region 102 can be effectively reduced.
Referring to fig. 1, in the present embodiment, the flexible display panel 100 further includes a color film substrate 3, a liquid crystal layer 4, an upper polarizer 5, a lower polarizer 6, and a flexible backlight module 7; specifically, the color film substrate 3 is arranged opposite to the array substrate 2; the liquid crystal layer 4 is arranged between the color film substrate 3 and the array substrate 2; the upper polarizer 5 is arranged on one side of the color film substrate 3, which is far away from the array substrate 2; the lower polarizer 6 is arranged on one side of the array substrate 2, which is far away from the color film substrate 3; the flexible backlight module 7 is arranged on one side of the lower polarizer 6, which is deviated from the array substrate 2. The flexible backlight module 7 preferably uses a mini-LED as a backlight source.
Referring to fig. 1, in the present embodiment, the color film substrate 3 includes a second flexible substrate layer 31 and a color film layer 32; two ends of one surface of the second flexible substrate layer 31 are provided with pre-stretching concave-convex structures at positions corresponding to the curved surface bending area 102; the color film layer 32 is disposed on a side of the second flexible substrate layer 31 away from the pre-stretching concavo-convex structure, and the color film layer 32 includes a red pixel unit 321, a green pixel unit 322, and a blue pixel unit 333.
Referring to fig. 6, in the present embodiment, the flexible display panel 100 further includes a glass cover plate 8 disposed on a side of the array substrate 2 away from the first flexible substrate layer 1. Fig. 6 is a schematic structural diagram of the flexible display panel 100 after being bent.
Example 2
Referring to fig. 7, the second embodiment includes most technical features of the first embodiment, that is, the flexible display panel 100 includes a first flexible substrate layer 1, an array substrate 2 and a glass cover plate 8, but the flexible display panel 100 in the second embodiment further includes a light emitting layer 21, a thin film encapsulation layer 22 and an upper polarizer 5, instead of the flexible display panel 100 in the first embodiment further including a color film substrate 3, a liquid crystal layer 4, an upper polarizer 5, a lower polarizer 6 and a flexible backlight module 7. In other words, the flexible display panel 100 in the first embodiment is a liquid crystal display panel, and the flexible display panel 100 in the second embodiment is an organic light emitting diode display panel.
Specifically, in the second embodiment, the light-emitting layer 21 is disposed on a side of the array substrate 2 facing away from the first flexible substrate layer 1, and the light-emitting layer 21 includes a red pixel sub-unit 211, a green pixel sub-unit 212, and a blue pixel sub-unit 213; the thin film encapsulation layer 22 is arranged on one side of the light emitting layer 21, which is far away from the array substrate 2; the upper polarizer 5 is arranged on one side of the film packaging layer 22, which is far away from the light-emitting layer 21.
In a second embodiment, please refer to fig. 6 for a structure of the flexible display panel 100 after bending.
Referring to fig. 8, the present invention further provides a method for manufacturing a flexible display panel 100, including the steps of:
s1, a step of manufacturing a first flexible substrate layer 1, providing a rigid substrate 200, where the rigid substrate 200 is provided with a planar area 101 and curved surface bending areas 102 located at two sides of the planar area 101, and a concave-convex structure 210 is arranged at a position corresponding to the curved surface bending area 102, a polyimide film is manufactured on the rigid substrate 200 by coating a polyimide solution and performing ultraviolet irradiation or thermal curing, and a pre-stretching concave-convex structure 10 is formed on the polyimide film corresponding to the concave-convex structure for buffering stress when the curved surface bending areas 102 are bent; the polyimide film layer is stripped from the rigid substrate 200 in a laser stripping mode to form the first flexible substrate layer 1; and
and S2, manufacturing the array substrate 2, and manufacturing the array substrate 2 on the side of the first flexible substrate layer 1, which is far away from the pre-stretching concave-convex structure.
The pre-stretching concave-convex structure 10 can effectively reduce the stress borne by the flexible display panel 100 at the bending position, thereby effectively reducing the risk of the flexible display panel 100 having poor function or appearance in the curved bending area 102. The principle is shown in fig. 5, which is not described herein.
Referring to fig. 9, when the flexible display panel 100 in the first embodiment is a liquid crystal display panel, after the step of manufacturing the array substrate 2, the method further includes:
s3, manufacturing a color film substrate 3, where the color film substrate 3 includes a second flexible substrate layer 31 and a color film layer 32, where two ends of one surface of the second flexible substrate layer 31 are provided with pre-stretching concave-convex structures at positions corresponding to the curved surface bending region 102, the color film layer 32 is provided on one side of the second flexible substrate layer 31 deviating from the pre-stretching concave-convex structures, and the color film layer 32 includes a red pixel unit 321, a green pixel unit 322, and a blue pixel unit 323;
s4, manufacturing a liquid crystal layer 4, namely, arranging the color film substrate 3 opposite to the array substrate 2, and filling liquid crystal between the color film substrate 3 and the array substrate 2 to form the liquid crystal layer 4;
s5, attaching a polarizer 5, wherein the polarizer 5 is attached to one side of the color film substrate 3, which is far away from the array substrate 2;
s6, attaching a lower polarizer 6, namely attaching the lower polarizer 6 to one side of the array substrate 2, which is far away from the color film substrate 3; and
s7, assembling a flexible backlight module 7, namely assembling the flexible backlight module 7 on one side of the lower polarizer 6, which is far away from the array substrate 2; the flexible backlight module 7 preferably uses a mini-LED as a backlight source.
Referring to fig. 10, when the flexible display panel 100 in the second embodiment is an organic light emitting diode display panel, after the step of manufacturing the array substrate 2, the method further includes:
s11, fabricating a light emitting layer 21, fabricating the light emitting layer 21 on a side of the array substrate 2 away from the first flexible substrate layer 1 by evaporation, where the light emitting layer 21 includes a red pixel sub-unit 211, a green pixel sub-unit 212, and a blue pixel sub-unit 213;
s12, manufacturing a film packaging layer 22, namely manufacturing the film packaging layer 22 on the side, away from the array substrate 2, of the light-emitting layer 21; and
and S13, attaching a polarizer 5, and attaching the polarizer 5 to one side of the film packaging layer 22, which is far away from the light-emitting layer 21.
Referring to fig. 9 and 10, after the step S2 of fabricating the array substrate 2, the method further includes:
and S8, attaching a glass cover plate 8, wherein the glass cover plate 8 is attached to one side of the array substrate 2 departing from the first flexible substrate layer 1.
In fig. 9, the step S8 of attaching the glass cover plate 8 is disposed after the step S7 of assembling the flexible backlight module 7; in fig. 10, the step S8 of attaching the glass cover 8 is disposed after the step S13 of attaching the polarizer 5.
The flexible display panel 100 and the manufacturing method thereof have the beneficial effects that the flexible display panel 100 comprises a first flexible substrate layer 1, and the pre-stretching concave-convex structures 10 are arranged at the positions, corresponding to the curved surface bending areas 102, of two ends of one surface of the first flexible substrate layer 1 and used for buffering stress when the curved surface bending areas 102 are bent, so that the stress borne by the flexible display panel 100 at the bending positions can be effectively reduced, and the risk that the flexible display panel 100 has poor functions or appearance in the curved surface bending areas 102 is effectively reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a flexible display panel which characterized in that is equipped with the plane district and is located the curved surface bending area of plane district both sides, flexible display panel includes:
the two ends of one surface of the first flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending areas and used for buffering stress when the curved surface bending areas are bent; and
the array substrate is arranged on one side, away from the pre-stretching concave-convex structure, of the first flexible substrate layer.
2. The flexible display panel of claim 1, wherein the pre-stretched concavo-convex structure comprises a plurality of adjacently disposed protrusions and depressions, the protrusions and depressions being joined end-to-end to form an undulating concavo-convex pattern.
3. The flexible display panel of claim 1, further comprising:
the color film substrate is arranged opposite to the array substrate;
the liquid crystal layer is arranged between the color film substrate and the array substrate;
the upper polaroid is arranged on one side of the color film substrate, which is deviated from the array substrate;
the lower polarizer is arranged on one side of the array substrate, which is far away from the color film substrate; and
and the flexible backlight module is arranged on one side of the lower polarizer, which deviates from the array substrate.
4. The flexible display panel according to claim 3, wherein the color filter substrate comprises:
the two ends of one surface of the second flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending positions; and
and the color film layer is arranged on one side of the second flexible substrate layer, which deviates from the pre-stretching concave-convex structure, and comprises red pixel units, green pixel units and blue pixel units.
5. The flexible display panel of claim 1, further comprising:
the light-emitting layer is arranged on one side, away from the first flexible substrate layer, of the array substrate and comprises a red pixel subunit, a green pixel subunit and a blue pixel subunit;
the thin film packaging layer is arranged on one side of the light emitting layer, which is deviated from the array substrate; and
and the upper polaroid is arranged on one side of the film packaging layer, which deviates from the light-emitting layer.
6. The flexible display panel of any of claims 1-5, further comprising:
and the glass cover plate is arranged on one side of the array substrate, which deviates from the first flexible substrate layer.
7. A method for manufacturing a flexible display panel is characterized by comprising the following steps:
the manufacturing method comprises the steps of manufacturing a first flexible substrate layer, providing a rigid substrate, wherein the rigid substrate is provided with a plane area and curved surface bending areas positioned on two sides of the plane area, concave-convex structures are arranged at the positions corresponding to the curved surface bending areas, a polyimide film layer is manufactured on the rigid substrate in a mode of coating a polyimide solution and irradiating or thermally curing by ultraviolet light, and pre-stretching concave-convex structures are formed on the polyimide film layer corresponding to the concave-convex structures and used for buffering stress when the curved surface bending areas are bent; the polyimide film layer is stripped from the rigid substrate in a laser stripping mode to form the first flexible substrate layer; and
and manufacturing an array substrate, namely manufacturing the array substrate on one side of the first flexible substrate layer, which is deviated from the pre-stretching concave-convex structure.
8. The method for manufacturing a flexible substrate according to claim 7, further comprising, after the step of manufacturing an array substrate:
manufacturing a color film substrate, wherein the color film substrate comprises a second flexible substrate layer and a color film layer, both ends of one surface of the second flexible substrate layer are provided with pre-stretching concave-convex structures corresponding to the curved surface bending regions, the color film layer is arranged on one side of the second flexible substrate layer, which is deviated from the pre-stretching concave-convex structures, and the color film layer comprises red pixel units, green pixel units and blue pixel units;
a step of manufacturing a liquid crystal layer, in which the color film substrate and the array substrate are arranged oppositely, and liquid crystal is filled between the color film substrate and the array substrate to form the liquid crystal layer;
attaching a polarizer, namely attaching a polarizer to one side of the color film substrate, which is far away from the array substrate;
attaching a lower polarizer, namely attaching the lower polarizer to one side of the array substrate, which is far away from the color film substrate; and
and assembling a flexible backlight module, namely assembling the flexible backlight module on one side of the lower polarizer, which is far away from the array substrate.
9. The method for manufacturing a flexible substrate according to claim 7, further comprising, after the step of manufacturing an array substrate:
manufacturing a light emitting layer, namely manufacturing the light emitting layer on one side of the array substrate, which is far away from the first flexible substrate layer, in an evaporation mode, wherein the light emitting layer comprises a red pixel subunit, a green pixel subunit and a blue pixel subunit;
manufacturing a thin film packaging layer, namely manufacturing the thin film packaging layer on one side of the light-emitting layer, which is far away from the array substrate; and
and attaching a polarizer, namely attaching a polarizer to one side of the film packaging layer, which is deviated from the light-emitting layer.
10. The method for manufacturing a flexible substrate according to claim 7, further comprising, after the step of manufacturing an array substrate:
and attaching a glass cover plate, wherein the glass cover plate is attached to one side of the array substrate, which deviates from the first flexible substrate layer.
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