CN110828516A - Display panel, preparation method thereof and display device - Google Patents
Display panel, preparation method thereof and display device Download PDFInfo
- Publication number
- CN110828516A CN110828516A CN201911030288.6A CN201911030288A CN110828516A CN 110828516 A CN110828516 A CN 110828516A CN 201911030288 A CN201911030288 A CN 201911030288A CN 110828516 A CN110828516 A CN 110828516A
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- display panel
- flexible substrate
- light
- groove
- thin film
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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
- H10K59/10—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
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- 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
-
- 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
Abstract
The invention discloses a display panel, a preparation method thereof and a display device, wherein the display panel comprises at least one bending area; a flexible substrate; the thin film transistor layer is arranged on the flexible substrate; the OLED layer is arranged on the thin film transistor layer; and the at least one groove is arranged on one side of the flexible substrate, which is far away from the thin film transistor layer, and corresponds to the bending area. The display panel and the preparation method thereof, and the display device provided by the invention have the beneficial effects that the groove is formed on one side of the display panel, which is opposite to the light-emitting surface, and corresponds to the bending area, so that the stress concentration generated in the bending process of the display panel is reduced, and the phenomenon that the display panel or the display device cracks or breaks in the bending area is prevented, and the service life of the display panel or the display device is influenced.
Description
Technical Field
The invention relates to the field of display, in particular to a display panel, a preparation method thereof and a display device.
Background
AMOLED (Active-matrix organic light-emitting diode, or Active-matrix organic light-emitting diode) is a display screen technology. Among them, OLEDs (organic light emitting diodes) are a specific type describing thin film display technology: organic electroluminescent display; AM (active matrix or active matrix) refers to the pixel addressing technique behind. Currently, the AMOLED technology is mainly used for smart phones and continues to be developed in the direction of low power consumption, low cost and large size.
The AMOLED display panel is gradually a new generation display technology due to its characteristics of high contrast, wide color gamut, low power consumption, and being foldable. Compared with the traditional LCD panel, the OLED display panel is easy to be flexible and is a key technology of wearable and foldable products. However, the OLED display panel in the display industry can only achieve Static Folding (SF), and Dynamic Folding (DF) is desired, and since stress relief of the light emitting region is difficult, cracks are easily generated or generated during the folding process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a display panel, a preparation method thereof and a display device, which are used for solving the technical problem that cracks appear on the display panel due to bending of the display panel in the prior art.
The technical scheme for solving the technical problems is as follows: the invention provides a display panel, which comprises at least one bending area; a flexible substrate; the thin film transistor layer is arranged on the flexible substrate; the OLED layer is arranged on the thin film transistor layer; and the at least one groove is arranged on one side of the flexible substrate, which is far away from the thin film transistor layer, and corresponds to the bending area.
Further, the ratio of the depth of the groove to the thickness of the flexible substrate ranges from 1:2 to 1: 3.
Furthermore, each bending area is provided with a bending central line, the light emitting surface comprises a first light emitting surface and a second light emitting surface which are respectively positioned at two sides of the bending central line, and the groove is positioned at one side of the display panel far away from the light emitting surface; when the display surface is in a display state, the light-emitting surface is a plane, and when the display panel is bent, the first light-emitting surface is bent towards the second light-emitting surface.
Further, the width of the groove is 20-30 um.
Further, any one of the grooves is symmetrical about the bending central line corresponding to the groove.
The invention also provides a preparation method of the display panel, wherein the display panel comprises at least one bending area, and the preparation steps comprise providing a flexible substrate; preparing a thin film transistor layer on the flexible substrate; evaporating a layer of OLED organic light-emitting material on the thin film transistor layer and packaging to form an OLED layer; and a groove is formed in one side of the flexible substrate, which is far away from the thin film transistor layer, and corresponds to the bending area.
Further, the flexible substrate is cut by adopting an embossing technology or a laser cutting technology to form the groove.
Further, the material of the flexible substrate includes a polyimide material.
The invention also provides a display device comprising the display panel.
The invention has the advantages that: the display panel and the preparation method thereof, and the display device are foldable devices, wherein the display panel is provided with a light-emitting surface for displaying pictures, when the display panel is folded, the light-emitting surfaces on two sides of a bending central line are bent inwards until the light-emitting surfaces are contacted with each other, at the moment, the outermost side of the display panel is a flexible substrate, the display screen of the display panel can be well protected, the service life of the display panel is prolonged, meanwhile, the thickness of the bent display panel is increased, the length of the bent display panel is reduced, the carrying is facilitated, a practical basis is provided for realizing the oversized display panel, a groove is formed in one side, opposite to the light-emitting surface, of the display panel, and corresponds to a bending area, so that stress concentration generated in the bending process of the display panel is reduced, cracks or fracture phenomena of the display panel or the display device.
Drawings
The invention is further explained below with reference to the figures and examples.
Fig. 1 is a schematic view of a display panel in embodiment 1.
Fig. 2 is a schematic view of a display panel bending process in embodiment 1.
Fig. 3 is a schematic view of the display panel in embodiment 1 after being completely bent.
Fig. 4 is a schematic view of a display device in embodiment 1.
Fig. 5 is a schematic view of a display panel in embodiment 2.
In the drawings
1 a display device; 10. 11 a display panel;
110 a flexible substrate; 120 a thin film transistor layer;
130 an OLED layer; 131 light-emitting surface;
111 grooves; 101. 1101 a bending region;
102. 1102 bending the central line;
Detailed Description
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
Example 1
As shown in fig. 1, in the embodiment, the display panel 10 of the invention includes a flexible substrate 110, a thin-film transistor layer 120, and an OLED layer 130.
The flexible substrate 110 is made of polyimide, is one of organic polymer materials with the best comprehensive performance, can resist high temperature up to 400 ℃, and ensures the high temperature resistance of the flexible substrate 110.
The thin film transistor layer 120 is arranged on the flexible substrate 110, the thin film transistor layer 120 is mainly made of oxide amorphous silicon, the structure of the thin film transistor layer comprises a grid electrode, an insulating layer, a semiconductor layer channel and a source drain electrode, the working principle of the thin film transistor layer is that the insulating layer is arranged between the metal grid electrode and the channel, a longitudinal electric field is generated through voltage on the grid electrode, the thickness of a conductive channel is changed, and the purpose of controlling current of the source drain electrode is achieved.
The OLED layer 130 is disposed on the thin film transistor layer 120, and is also called an organic electroluminescent display or an organic light emitting semiconductor, and belongs to a current type organic light emitting device, and emits light through injection and recombination of carriers, and the light emitting intensity thereof is in direct proportion to the injected current, and under the action of an electric field, holes generated at an anode and electrons generated at a cathode of the OLED layer 130 move, and are injected into the hole transport layer and the electron transport layer, respectively, and migrate to the light emitting layer. When the two meet at the light emitting layer, energy excitons are generated, thereby exciting the light emitting molecules to finally generate visible light. In this embodiment, the OLED layer 130 includes a light emitting surface 131, the light emitting surface 131 is disposed on a side of the OLED layer 130 away from the thin film transistor layer 120, and the visible light generated by the OLED layer 130 forms a final display image through the light emitting surface 131.
In the embodiment of the present disclosure, the display panel 10 includes a bending region 101, and the display panel 10 can be bent through the bending region 101 to achieve the purpose of reducing the maximum size, so that the display panel is convenient to carry, and after bending, the light emitting surface 131 of the display panel 10 is bent inward, and the flexible substrate 110 faces outward to achieve the purpose of protecting the light emitting surface 131, so as to prolong the service life of the display panel 10.
As shown in fig. 2 and 3, since the bending direction of the display panel 10 is the direction of the light emitting surface 131, during the bending process, the opposite direction of the light emitting surface 131, that is, the flexible substrate 110 may form a stress concentration in the bending region during the bending process, so as to cause a fracture or a crack at the flexible substrate 110 corresponding to the bending region, in order to solve this phenomenon, in this embodiment, a groove 111 is formed on a side of the flexible substrate 110 away from the light emitting surface 131, wherein the groove 111 specifically corresponds to the bending region 101, the bending region 101 includes a bending center line 102, the bending region 101 is symmetrical about the bending center line 102, and the groove 111 is also symmetrical about the bending center line 102.
The ratio of the depth of the groove 111, namely the depth of the groove 111 recessed into the flexible substrate 110, to the thickness of the flexible substrate 110 is 1: 3-1: 2, so that stress can be released during bending of the flexible substrate 110, the thickness of the flexible substrate 110 after grooving is ensured, and the influence on the service life of the flexible substrate 110 at the bending area 101 due to too low thickness is prevented.
In this embodiment, the display panel 10 can be bent by 180 degrees, that is, the light emitting surfaces 131 on two sides of the bending center line 102 are in direct face-to-face contact after being bent, so that the floor space of the display panel 10 is greatly saved.
In order to better explain the present invention, the present embodiment further provides a method for manufacturing a display panel, where the display panel includes at least one bending region, and the method includes the following steps:
a flexible substrate is provided.
And preparing a thin film transistor layer on the flexible substrate.
And evaporating a layer of OLED organic light-emitting material on the thin film transistor layer and packaging to form an OLED layer.
The flexible substrate is far away from one side of the thin film transistor layer and is cut into grooves by adopting an embossing technology or a laser cutting technology, the depth of the grooves after cutting is 1/3-1/2 of the thickness of the flexible substrate, which is not cut, and the grooves correspond to the bending areas.
As shown in fig. 4, in this embodiment, the display device 1 includes the display panel 10, wherein the main technical features and the main technical effects of the display device 1 are collectively embodied on the display panel 10, and the description of the remaining components of the display device 1 is omitted.
Example 2
As shown in fig. 5, in this embodiment, the display panel 11 has a structure substantially similar to that of the display panel 10 in embodiment 1, except that the display panel 11 of the present invention includes two or more bending regions 1101 and a bending center line 1102, that is, the display panel 11 can be bent twice or three times to further reduce the maximum size of the display panel 11, and in this embodiment, the display panel preferably includes two bending regions 1101 and a bending center line 1102.
In this embodiment, each bending region 1101 corresponds to a groove 111, the groove 111 is disposed on a side of the flexible substrate 110 away from the light emitting surface 131, and the grooves 111 are symmetrical with respect to the bending center line 1102.
The ratio of the depth of the groove 111, namely the depth of the groove 111 recessed into the flexible substrate 110, to the thickness of the flexible substrate 110 is 1: 3-1: 2, which not only ensures that the flexible substrate 110 can release stress in the bending process, but also ensures the thickness of the flexible substrate 110 after being grooved, and prevents the influence on the service life of the flexible substrate 110 at the bending region 1101 due to too low thickness.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A display panel is characterized by comprising at least one bending area;
the display panel includes:
a flexible substrate;
the thin film transistor layer is arranged on the flexible substrate;
the OLED layer is arranged on the thin film transistor layer;
and the at least one groove is arranged on one side of the flexible substrate, which is far away from the thin film transistor layer, and corresponds to the bending area.
2. The display panel according to claim 1,
the ratio of the depth of the groove to the thickness of the flexible substrate ranges from 1:2 to 1: 3.
3. The display panel according to claim 1,
the OLED layer comprises a light-emitting surface, and the light-emitting surface is arranged on one side, far away from the thin film transistor layer, of the OLED layer.
4. The display panel of claim 3, wherein each bending region has a bending center line, the light-emitting surface includes a first light-emitting surface and a second light-emitting surface respectively located at two sides of the bending center line, and the groove is located at a side of the display panel away from the light-emitting surface; when the display surface is in a display state, the light-emitting surface is a plane, and when the display panel is bent, the first light-emitting surface is bent towards the second light-emitting surface.
5. The display panel according to claim 4,
any one groove is symmetrical about the bending central line corresponding to the groove.
6. The display panel according to claim 1,
the width of the groove is 20-30 um.
7. A method for preparing a display panel, wherein the display panel comprises at least one bending region, and the preparation method comprises
Providing a flexible substrate;
preparing a thin film transistor layer on the flexible substrate;
evaporating a layer of OLED organic light-emitting material on the thin film transistor layer and packaging to form an OLED layer;
and a groove is formed in one side of the flexible substrate, which is far away from the thin film transistor layer, and corresponds to the bending area.
8. The method for manufacturing a display panel according to claim 7,
and cutting the flexible substrate by adopting an imprinting technology or a laser cutting technology to form the groove.
9. The method for manufacturing a display panel according to claim 7,
the material of the flexible substrate comprises a polyimide material.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030288.6A CN110828516A (en) | 2019-10-28 | 2019-10-28 | Display panel, preparation method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911030288.6A CN110828516A (en) | 2019-10-28 | 2019-10-28 | Display panel, preparation method thereof and display device |
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| Publication Number | Publication Date |
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| CN110828516A true CN110828516A (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911030288.6A Pending CN110828516A (en) | 2019-10-28 | 2019-10-28 | Display panel, preparation method thereof and display device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111383535A (en) * | 2020-03-25 | 2020-07-07 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN111710760A (en) * | 2020-06-28 | 2020-09-25 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN112116875A (en) * | 2020-10-13 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Foldable display module |
| CN112786621A (en) * | 2021-01-11 | 2021-05-11 | 武汉华星光电半导体显示技术有限公司 | Flexible substrate, display panel and display device |
| CN113421495A (en) * | 2021-06-28 | 2021-09-21 | 武汉华星光电半导体显示技术有限公司 | Foldable display module and manufacturing method thereof |
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| CN107968109A (en) * | 2017-11-21 | 2018-04-27 | 武汉华星光电半导体显示技术有限公司 | Flexible OLED display panel and preparation method thereof, display device |
| CN109638056A (en) * | 2018-12-19 | 2019-04-16 | 武汉华星光电半导体显示技术有限公司 | A kind of flexible display panels and preparation method thereof |
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| CN206594962U (en) * | 2017-03-16 | 2017-10-27 | 昆山工研院新型平板显示技术中心有限公司 | Flexible folding screen substrate and flexible folding screen |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111383535A (en) * | 2020-03-25 | 2020-07-07 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN111383535B (en) * | 2020-03-25 | 2022-07-08 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN111710760A (en) * | 2020-06-28 | 2020-09-25 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN111710760B (en) * | 2020-06-28 | 2022-06-03 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof and display device |
| CN112116875A (en) * | 2020-10-13 | 2020-12-22 | 武汉华星光电半导体显示技术有限公司 | Foldable display module |
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| CN112786621A (en) * | 2021-01-11 | 2021-05-11 | 武汉华星光电半导体显示技术有限公司 | Flexible substrate, display panel and display device |
| CN113421495A (en) * | 2021-06-28 | 2021-09-21 | 武汉华星光电半导体显示技术有限公司 | Foldable display module and manufacturing method thereof |
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Application publication date: 20200221 |