CN110649070A - Flexible substrate, flexible display panel and manufacturing method of flexible substrate - Google Patents
Flexible substrate, flexible display panel and manufacturing method of flexible substrate Download PDFInfo
- Publication number
- CN110649070A CN110649070A CN201910827058.6A CN201910827058A CN110649070A CN 110649070 A CN110649070 A CN 110649070A CN 201910827058 A CN201910827058 A CN 201910827058A CN 110649070 A CN110649070 A CN 110649070A
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
Abstract
The invention provides a flexible substrate, a flexible display panel and a manufacturing method of the flexible substrate. The flexible substrate is provided with a bending area and a non-bending area; the non-bending region comprises a first substrate layer; the bending area comprises a first substrate layer and a second substrate layer arranged on one side of the first substrate layer, and a plurality of grooves which are arranged in an array mode are formed in the second substrate layer and used for dispersing tensile force and stress generated when the bending area is bent. The manufacturing method of the flexible substrate comprises the following steps: providing a glass substrate, manufacturing a first substrate layer, manufacturing a second substrate layer and patterning a bending area. The flexible display panel comprises the flexible substrate, the array substrate, the light emitting layer and the polarizer. According to the invention, the tensile force and stress generated during bending are dispersed through the grooves, so that the tensile force and stress generated during bending are reduced, and the bending times of the second substrate layer can be improved and certain stiffness can be kept; thereby enhancing the bending resistance and impact resistance.
Description
Technical Field
The invention relates to the field of display, in particular to a flexible substrate, a flexible display panel and a manufacturing method of the flexible substrate.
Background
With the explosion of Organic Light Emitting Diode (OLED) industry, foldable products are becoming popular, and the bending technology therein becomes a bottleneck restricting further development of the products. Flexible display technology, as one of the emerging fields of Flat Panel Displays (FPDs), is a major direction for the development of Organic Light Emitting Diodes (OLEDs) in the future. Flexible display panels are receiving more and more attention due to their advantages of being light, thin, not fragile, bendable, wearable, and the like.
The flexible display panel has the characteristics of lightness, thinness and easiness in bending, but the stiffness (synonymous with rigidity and hardness) of the flexible display panel is not enough, and the flatness is difficult to ensure due to generated tensile force and stress in the process of bending to flattening. Mainly, the existing flexible substrate cannot keep certain stiffness, stress concentration during bending and poor impact resistance, so that the flexible display panel is easily damaged.
Disclosure of Invention
The invention aims to provide a flexible substrate, a flexible display panel and a manufacturing method of the flexible substrate, which disperse tensile force and stress during bending, thereby reducing the tensile force and the stress generated during bending and enhancing the bending resistance and the impact resistance of the flexible display panel.
In order to solve the above problems, the present invention provides a flexible substrate, which is provided with a bending region and a non-bending region, wherein the bending region is located between two adjacent non-bending regions; the non-bending region comprises a first substrate layer; the bending area comprises a first substrate layer and a second substrate layer arranged on one side of the first substrate layer, a plurality of grooves which are arranged in an array mode are formed in the second substrate layer, and the grooves are used for dispersing tensile force and stress generated when the bending area is bent.
Further, the groove penetrates through the second substrate layer.
Further, the horizontal section of the groove is circular, rhombic or strip-shaped.
Further, the groove is formed by sintering with an ultraviolet laser.
Further, the material of the first substrate layer and the second substrate layer includes polyimide.
Further, the thickness range of the first substrate layer and the second substrate layer is both 6um-10 um.
The invention also provides a manufacturing method of the flexible substrate, which is characterized by comprising the following steps:
providing a glass substrate, providing a glass substrate and cleaning;
a step of manufacturing a first substrate layer, which is to coat a layer of polyimide solution on the glass substrate, and form the first substrate layer through baking and curing;
manufacturing a second substrate layer, namely dividing the first substrate layer into a bending area and a non-bending area, wherein the bending area is positioned between two adjacent non-bending areas, coating a layer of polyimide solution on the first substrate layer in the bending area, and baking and curing the polyimide solution by an oven to form the second substrate layer; and
and patterning the bending area, namely sintering the second substrate layer by using an ultraviolet laser to form a plurality of grooves which are arranged in an array manner.
Further, after the step of fabricating a first substrate layer and before the step of fabricating a second substrate layer, the method further comprises: and cleaning the first substrate layer, namely cleaning the first substrate layer.
The invention further provides a flexible display panel, which comprises the flexible substrate, an array substrate, a light-emitting layer and a polarizer; specifically, the array substrate is arranged on one side of the second substrate layer of the flexible substrate; the light emitting layer is arranged on one side of the array substrate, which is far away from the flexible substrate; the polaroid is arranged on one side of the light-emitting layer, which deviates from the array substrate.
Furthermore, the flexible display panel further comprises a glass cover plate, and the glass cover plate is arranged on one side of the polarizer, which deviates from the light emitting layer.
The invention has the beneficial effects that the invention provides the flexible substrate, the flexible display panel and the manufacturing method of the flexible substrate, the groove with a specific pattern is formed in the bending area of the flexible substrate to disperse the tensile force and the stress during bending, so that the tensile force and the stress generated during bending are reduced, and the second substrate layer is arranged in the bending area for local thickening, so that the total amount of the buffer material for buffering the tensile force during bending is increased, the bending times can be improved, and a certain stiffness can be kept; and the provision of the grooves reduces and disperses stress during bending, and the grooves also enhance impact resistance. Thereby enhancing the bending resistance and impact resistance of the flexible display panel.
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 plan view illustrating an array substrate according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of an array substrate according to an embodiment of the invention;
FIG. 3 is a flow chart of a method of fabricating a flexible substrate in an embodiment of the invention;
fig. 4 is a schematic structural diagram of a flexible display panel according to an embodiment of the present invention.
The components in the figure are identified as follows:
1. a bending area 2, a non-bending area 10, a flexible substrate 11, a first substrate layer,
12. a second substrate layer, 13, a groove, 20, an array substrate, 30, a light-emitting layer,
40. polarizer, 50, glass cover plate, 100 and flexible display panel.
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.
Referring to fig. 1 and fig. 2, in an embodiment of the invention, a flexible substrate 10 is provided, which includes a bending region 1 and a non-bending region 2, where the bending region 1 is located between two adjacent non-bending regions 2; the non-bending area 2 comprises a first substrate layer 11, the bending area 1 comprises the first substrate layer 11 and a second substrate layer 12 arranged on one side of the first substrate layer 11, a plurality of grooves 13 arranged in an array mode are formed in the second substrate layer 12, and the grooves 13 are used for dispersing tensile force and stress generated when the bending area 1 is bent. Moreover, the second substrate layer 12 is arranged in the bending area 1 for local thickening, so that the total amount of buffer materials for buffering tensile force during bending is increased, the bending times can be improved, and certain stiffness can be kept; and the provision of the grooves 13 reduces and disperses stress at the time of bending, and the grooves 13 also enhance impact resistance.
In this embodiment, the groove 13 extends through the second substrate layer 12. Namely, the groove 13 is arranged on the second substrate layer 12 in a through hole form, so that the second substrate layer 12 is more beneficial to being deformed during bending to disperse the tensile force and stress generated during bending of the bending area 1.
Referring to fig. 1, in the present embodiment, the horizontal cross section of the groove 13 is circular, diamond or strip, that is, the shape of the groove 13 viewed from the top view of fig. 1.
In this embodiment, the groove 13 is formed by sintering with an ultraviolet laser.
In this embodiment, the material of the first substrate layer 11 and the second substrate layer 12 includes polyimide.
In this embodiment, the thickness ranges of the first substrate layer 11 and the second substrate layer 12 are both 6um to 10 um. Wherein the thickness of the first substrate layer 11 and the second substrate layer 12 is preferably 10um, 9um, 8um, 7um, 6um, respectively.
Referring to fig. 3, a method for manufacturing a flexible substrate 10 according to an embodiment of the present invention includes steps S1-S4:
s1, providing a glass substrate, and cleaning the glass substrate;
s2, manufacturing a first substrate layer 11, namely coating a layer of polyimide solution on the glass substrate, removing pyrrolidone (NMP) through high-temperature vacuum solvent removing equipment, and baking and curing in an oven at high temperature to form the first substrate layer 11;
s3, manufacturing a second substrate layer 12, namely dividing the first substrate layer 11 into a bending area 1 and a non-bending area 2, wherein the bending area 1 is positioned between two adjacent non-bending areas 2, coating a layer of polyimide solution on the first substrate layer 11 in the bending area 1, and baking and curing the polyimide solution in an oven to form the second substrate layer; and
and S4, patterning the bending area 1, and sintering the second substrate layer 12 by using an ultraviolet laser to form a plurality of grooves 13 arranged in an array.
In this embodiment, after the step S2 of fabricating the first substrate layer 11 and before the step S3 of fabricating the second substrate layer 12, the method further includes:
and S21, cleaning the first substrate layer 11, and cleaning the first substrate layer 11.
In this embodiment, the groove 13 is formed in the second substrate layer 12, so that the tensile force and the stress generated when the bending region 1 is bent can be dispersed. Moreover, the second substrate layer 12 is arranged in the bending area 1 for local thickening, so that the total amount of buffer materials for buffering tensile force during bending is increased, the bending times can be improved, and certain stiffness can be kept; and the provision of the grooves 13 reduces and disperses stress at the time of bending, and the grooves 13 also enhance impact resistance.
Referring to fig. 4, an embodiment of the invention provides a flexible display panel 100, which includes the flexible substrate 10, the array substrate 20, the light-emitting layer 30 and the polarizer 40; specifically, the array substrate 20 is disposed on the second substrate layer 12 side of the flexible substrate 10; the light emitting layer 30 is arranged on one side of the array substrate 20, which is far away from the flexible substrate 10; the polarizer 40 is disposed on a side of the light-emitting layer 30 facing away from the array substrate 20.
In this embodiment, the flexible display panel 100 further includes a glass cover plate 50, and the glass cover plate 50 is disposed on a side of the polarizer 40 departing from the light-emitting layer 30. Wherein the polarizer 40 and the glass cover plate 50 are combined by a sealant (not shown).
The flexible display panel 100 in this embodiment may be: any product or component with a display function, such as wearable equipment, a mobile phone, a tablet computer, a television, a display, a notebook computer, an electronic book, electronic newspaper, a digital photo frame, a navigator and the like. The wearable device comprises a smart bracelet, a smart watch, a VR (Virtual Reality) and other devices.
The working principle of the flexible display panel 100 provided in this embodiment is the same as the working principle of the flexible substrate 10, and specific structural relationships and working principles are referred to the flexible substrate 10 embodiment, which is not described herein again.
The invention has the beneficial effects that the invention provides the flexible substrate 10, the flexible display panel 100 and the manufacturing method of the flexible substrate 10, the specific pattern of grooves is formed in the bending area 1 of the flexible substrate 10 to disperse the tensile force and stress during bending, so that the tensile force and stress generated during bending are reduced, in addition, the second substrate layer 12 is arranged in the bending area 1 for local thickening, the total amount of buffer materials for buffering the tensile force during bending is increased, the bending times can be improved, and certain stiffness can be kept; and the provision of the grooves 13 reduces and disperses stress at the time of bending, and the grooves 13 also enhance impact resistance. Thereby enhancing the bending resistance and impact resistance of the flexible display panel.
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. A flexible substrate provided with a bending region and a non-bending region,
the bending area is positioned between two adjacent non-bending areas;
the non-bending region comprises a first substrate layer;
the bending area comprises a first substrate layer and a second substrate layer arranged on one side of the first substrate layer, a plurality of grooves which are arranged in an array mode are formed in the second substrate layer, and the grooves are used for dispersing tensile force and stress generated when the bending area is bent.
2. The flexible substrate of claim 1, wherein the groove extends through the second substrate layer.
3. The flexible substrate of claim 1, wherein the horizontal cross-section of the groove is circular, diamond-shaped, or strip-shaped.
4. The flexible substrate of claim 1, wherein the groove is formed by ultraviolet laser sintering.
5. The flexible substrate of claim 1, wherein the material of the first substrate layer and the second substrate layer comprises polyimide.
6. The flexible substrate of claim 1,
the thickness range of the first substrate layer and the second substrate layer is 6um-10 um.
7. A method of making a flexible substrate, comprising the steps of:
providing a glass substrate, providing a glass substrate and cleaning;
a step of manufacturing a first substrate layer, which is to coat a layer of polyimide solution on the glass substrate, and form the first substrate layer through baking and curing;
manufacturing a second substrate layer, namely dividing the first substrate layer into a bending area and a non-bending area, wherein the bending area is positioned between two adjacent non-bending areas, coating a layer of polyimide solution on the first substrate layer in the bending area, and baking and curing the polyimide solution by an oven to form the second substrate layer; and
and patterning the bending area, namely sintering the second substrate layer by using an ultraviolet laser to form a plurality of grooves which are arranged in an array manner.
8. The method of claim 7, further comprising, after the step of fabricating a first substrate layer and before the step of fabricating a second substrate layer:
and cleaning the first substrate layer, namely cleaning the first substrate layer.
9. A flexible display panel, comprising:
the flexible substrate of any one of claims 1-6;
the array substrate is arranged on one side of the second substrate layer of the flexible substrate;
the light-emitting layer is arranged on one side of the array substrate, which is far away from the flexible substrate; and
and the polaroid is arranged on one side of the light-emitting layer, which deviates from the array substrate.
10. The flexible display panel of claim 9, further comprising
And the glass cover plate is arranged on one side of the polaroid, which deviates from the light-emitting layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910827058.6A CN110649070A (en) | 2019-09-03 | 2019-09-03 | Flexible substrate, flexible display panel and manufacturing method of flexible substrate |
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| CN201910827058.6A CN110649070A (en) | 2019-09-03 | 2019-09-03 | Flexible substrate, flexible display panel and manufacturing method of flexible substrate |
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| CN110649070A true CN110649070A (en) | 2020-01-03 |
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| CN201910827058.6A Pending CN110649070A (en) | 2019-09-03 | 2019-09-03 | Flexible substrate, flexible display panel and manufacturing method of flexible substrate |
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| CN111312660A (en) * | 2020-02-25 | 2020-06-19 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN111724681A (en) * | 2020-06-09 | 2020-09-29 | 武汉华星光电半导体显示技术有限公司 | Substrate, preparation method thereof and display panel |
| CN111816612A (en) * | 2020-06-29 | 2020-10-23 | 合肥维信诺科技有限公司 | Display panel manufacturing method and display panel mother board |
| CN112002230A (en) * | 2020-08-27 | 2020-11-27 | 武汉华星光电半导体显示技术有限公司 | Folding display device |
| CN112592075A (en) * | 2020-12-15 | 2021-04-02 | 昆山国显光电有限公司 | Glass cover plate, glass cover plate manufacturing method and electronic equipment |
| WO2021196380A1 (en) * | 2020-04-02 | 2021-10-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and flexible display device |
| CN113539070A (en) * | 2020-04-13 | 2021-10-22 | 北京小米移动软件有限公司 | Display panel, manufacturing method thereof and electronic equipment |
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