CN109860242B - Flexible display substrate, preparation method and display device - Google Patents
Flexible display substrate, preparation method and display device Download PDFInfo
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- CN109860242B CN109860242B CN201910016946.XA CN201910016946A CN109860242B CN 109860242 B CN109860242 B CN 109860242B CN 201910016946 A CN201910016946 A CN 201910016946A CN 109860242 B CN109860242 B CN 109860242B
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Abstract
The embodiment of the invention relates to the technical field of display, and discloses a flexible display substrate, which comprises: the pixel array comprises a flexible substrate, a plurality of pixel islands positioned on the flexible substrate and inter-island connecting lines used for communicating adjacent pixel islands; the pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connection positions; the interstrand connecting line includes: and a connection portion connecting the main body portion and contacting a corner of the pixel island, the connection portion gradually becoming wider from the main body portion in a direction approaching the pixel island. The embodiment of the invention also provides a preparation method of the flexible display substrate and a display device. According to the flexible display substrate, the preparation method and the display device provided by the embodiment of the invention, the connection part of the pixel island and the connecting line between the islands is not easy to break, so that the reliability of the flexible display substrate when being stretched is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a flexible display substrate, a preparation method and a display device.
Background
With the development of the information-oriented society, a display device for displaying an image has been increasingly demanded. Recently, various types of flat panel display devices, such as liquid crystal display devices, plasma display devices, and electrophoretic display devices, have been developed. However, the conventional display device is made of rigid materials such as glass, and the size and the shape of the display device are fixed after being produced, so that the display device cannot be used in multiple occasions and complex environments. Therefore, people have been working on flexible stretchable display devices for many years, and the first global stretchable display device based on AMOLED appeared in 2017, and the screen body of the stretchable display device can be bent and stretched at a certain angle without being damaged. This has greatly accelerated the research of large display companies on the stretchable display technology, and various stretchable display devices are gradually emerging on the market.
However, the inventors of the present invention have found that a stretchable display device in the related art is generally provided with a plurality of pixel islands and inter-island connection lines connecting the respective pixel islands. With the increasing popularity of wearable devices, higher requirements are put on the tensile performance of the display substrate, but when the tensile is realized, the connection part of the pixel island and the connecting line between the islands bears the largest stress, and the pixel island and the connecting line between the islands are easy to break.
Disclosure of Invention
The invention aims to provide a flexible display substrate, a preparation method and a display device, which enable the connection part of a pixel island and an inter-island connecting line not to be easily broken, thereby improving the reliability of the flexible display substrate during stretching.
In order to solve the above technical problem, an embodiment of the present invention provides a flexible display substrate, including: the pixel array comprises a flexible substrate, a plurality of pixel islands positioned on the flexible substrate and inter-island connecting lines used for communicating adjacent pixel islands; the pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connection positions; the interstrand connecting line includes: and a connection portion connecting the main body portion and contacting a corner of the pixel island, the connection portion gradually becoming wider from the main body portion in a direction approaching the pixel island.
Embodiments of the present invention also provide a flexible display device including the flexible display substrate as described above.
The embodiment of the invention also provides a preparation method of the flexible display substrate, which comprises the following steps: forming a plurality of pixel islands and inter-island connecting lines for communicating adjacent pixel islands on a flexible substrate, wherein each pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connecting positions; the interstrand connecting line includes: and a connection portion connecting the main body portion and contacting a corner of the pixel island, the connection portion gradually becoming wider from the main body portion in a direction approaching the pixel island.
Compared with the prior art, the embodiment of the invention provides a flexible display substrate, which comprises: the pixel array comprises a flexible substrate, a plurality of pixel islands positioned on the flexible substrate and inter-island connecting lines used for communicating adjacent pixel islands; the pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connection positions; the interstrand connecting line includes: and a connection portion connecting the main body portion and contacting a corner of the pixel island, the connection portion gradually becoming wider from the main body portion in a direction approaching the pixel island. The connecting parts of the connecting wires between the islands are connected with the corners of the pixel islands, the connecting parts are set to be gradually widened along the direction close to the pixel islands, the width of the connecting parts of the connecting wires between the islands is wider as the connecting parts are closer to the pixel islands, and therefore when the display substrate achieves stretching display, the stress borne by the connecting wires between the islands and the connecting positions of the pixel islands can be dispersed, the connecting positions of the connecting wires between the islands and the connecting positions of the pixel islands are not prone to fracture, and therefore the reliability of the flexible display substrate during stretching is improved.
In addition, the plurality of edges are all arc-shaped edges. The edge of the pixel island in the scheme is set to be the arc-shaped edge, so that the stress bearing capacity of the pixel island is improved, and the pixel island is not easy to damage when the display substrate is stretched.
In addition, the edges enclose a diamond shape. In the scheme, the pixel islands are arranged in a diamond shape, so that the stress borne by the pixel islands is uniformly dispersed and is not easy to damage when the display substrate is stretched.
In addition, the connecting part comprises connecting part edges which are mutually spaced and oppositely arranged in the width direction of the connecting part, and the connecting part edges are arc lines. The edge of the connecting part of the connecting line connecting the pixel island between the islands in the scheme is set to be an arc line, so that the stress bearing capacity of the connecting part of the connecting line between the islands is increased, and the connecting part is not easy to break.
In addition, the inter-island connecting lines are made of flexible conductive materials. In the scheme, the connecting lines between the islands are made of flexible conductive materials, so that the stress bearing capacity of the connecting lines between the islands is further enhanced.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
FIG. 1 is a schematic diagram of a pixel island and inter-island connection line connection structure according to the prior art;
fig. 2 is a schematic structural diagram of a pixel island and an inter-island connection line according to a first embodiment of the present invention;
fig. 3 is a schematic structural diagram of a pixel island and an inter-island connection line according to a second embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for manufacturing a flexible display device according to a fourth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.
The pixel islands refer to the part of the non-stretchable device when the flexible display substrate is stretched for display. To protect the device, the location of the device is usually set as a whole, and so is called a "pixel island". As shown in fig. 1, a flexible display substrate in the prior art is formed by connecting a square pixel island structure at an end point of a pixel island edge with a wire, and during a stretching process, stress at a connection point of the two is the largest, so that on one hand, the wire is easily disconnected at the connection point due to overlarge tension, and on the other hand, the stress at the connection point acts on the island to cause device damage.
A first embodiment of the present invention relates to a flexible display substrate 100, as shown in fig. 2, including: the pixel array comprises a flexible substrate 1, a plurality of pixel islands 2 positioned on the flexible substrate 1 and inter-island connecting lines 3 for communicating the adjacent pixel islands 2; the pixel island 2 comprises a plurality of edges which are sequentially connected end to end and form a corner 21 at the connection position; the inter-island connection line 3 includes: the main body 31 and the connection portion 32 connecting the main body 31 and contacting the corner 21 of the pixel island 2, the connection portion 32 gradually becomes wider from the main body 31 in a direction approaching the pixel island 2. The connecting parts 32 of the inter-island connecting wires 3 are connected with the corners 21 of the pixel islands 2, the connecting parts 32 are gradually widened along the direction close to the pixel islands 2, and the line width of the connecting parts 32 of the inter-island connecting wires 3 is wider as the connecting parts are closer to the pixel islands 2, so that when the display substrate 100 realizes stretching display, the stress borne by the connecting parts of the inter-island connecting wires 3 and the pixel islands 2 can be dispersed, the connecting parts of the inter-island connecting wires 3 and the pixel islands 2 are not easy to break, and the reliability of the flexible display substrate 100 in stretching is improved.
The following description specifically describes implementation details of the flexible display substrate 100 of the present embodiment, and the following description is only provided for easy understanding and is not necessary for implementing the present embodiment.
The shape of the pixel island 2 may be any of polygons such as a triangle, a diamond, and a rectangle, but is not limited thereto.
Further, the plurality of edges of the pixel island 2 are all arc edges. Specifically, in the present embodiment, the edge of the pixel island 2 is set to be an arc, and due to the existence of the arc structure, the stress applied to the pixel island 2 can be dispersed, so that the stress bearing capability of the pixel island 2 is enhanced, and the pixel island 2 is not easily damaged. Preferably, the lengths of the arc edges of the pixel island 2 are equal, so that the stress applied to the pixel island is uniformly distributed to each portion of the pixel island 2, thereby further enhancing the stress bearing capability of the pixel island 2.
Specifically, in the present embodiment, the body portion 31 has a uniform width. It will be appreciated by those skilled in the art that only one example of the style of the body portion is given herein. Alternatively, the inter-island connection lines 3 may be provided in a pattern with a gradually changing overall width, which gradually widens from the middle of the inter-island connection lines 3 in a direction approaching the pixel islands 2. In practical application, the style of the inter-island connecting lines 3 can be flexibly set according to different practical requirements.
As shown in fig. 3, the connecting portion 32 in the present embodiment includes edges of the connecting portion 32 that are spaced apart from each other in the width direction of the connecting portion and are disposed opposite to each other, and the edges of the connecting portion 32 are curved. The edge of the connecting part 32 of the inter-island connecting wire 3 is set to be an arc line, and the stress acting on the connecting part 32 is further dispersed, so that the stress bearing capacity of the connecting part 32 is enhanced, and the connecting part of the inter-island connecting wire 3 and the pixel island 2 is ensured not to be easily broken.
It should be noted that the pixel island 2 includes a pixel group, i.e. a group of sub-pixels, and the signal communication between adjacent pixel groups can be realized by means of the inter-island connecting lines 3. Each pixel island 2 may include one or more sub-pixels, which is not limited in this embodiment. A thin film transistor and a signal line electrically connected to the thin film transistor, such as a scan signal line, a data signal line, and/or a power signal line, are provided in the pixel island 2. The inter-island connecting lines 3 connect the similar signal lines of two adjacent pixel islands 2, and the inter-island connecting lines 3 may include: a first inter-island connection line electrically connecting the scanning signal lines of the adjacent pixel islands 2, a second inter-island connection line electrically connecting the data signal lines of the adjacent pixel islands 2, and/or a third inter-island connection line electrically connecting the power signal lines of the adjacent pixel islands 2, and the like. The pixel group, the thin film transistor, and the signal line are not shown in this embodiment mode.
In this embodiment, the pixel unit for displaying in the pixel island 2 is an Organic Light-Emitting Diode (OLED), and it is understood that the pixel unit in the pixel island is an OLED device, which is only a specific example in this embodiment, and is not limited thereto, and may be other display elements that can be used for displaying.
Compared with the prior art, in the flexible display substrate 100 according to the embodiment of the invention, the connecting portion 32 of the inter-island connecting line 3 is connected with the corner 21 of the pixel island 2, and the connecting portion 32 is set to be gradually widened along the direction close to the pixel island 2, and the line width of the connecting portion 32 of the inter-island connecting line 3 is wider as the connecting portion is closer to the pixel island 2, so that when the display substrate 100 realizes stretching display, the stress borne by the connecting portion of the inter-island connecting line 3 and the pixel island 2 can be dispersed, the connecting portion of the inter-island connecting line 3 and the pixel island 2 is not easy to break, and the reliability of the flexible display substrate 100 during stretching is improved.
A second embodiment of the present invention relates to a flexible display substrate 200, as shown in fig. 3. The second embodiment is substantially the same as the first embodiment except that the plurality of edges of the pixel island 2 are all straight edges.
Specifically, the plurality of edges of the pixel island 2 in the present embodiment are all straight edges. Compared with the first embodiment in which the edge of the pixel island 2 is set as the arc edge, the process for manufacturing the pixel island 2 is simple in this embodiment. Preferably, the plurality of edges form a diamond shape, the pixel island 2 is in the shape of a diamond, and the lengths of four sides of the diamond shape are equal, so that the stress applied to the pixel island 2 is uniformly distributed to each part of the pixel island 2, thereby enhancing the stress bearing capacity of the pixel island 2.
Further, the body portion 31 is uniform in width. Specifically, a specific form of the main body portion 31 is given in the present embodiment. It will be appreciated by those skilled in the art that only one example of a style is given herein. Alternatively, the inter-island connection lines 3 may be provided in a pattern with a gradually changing overall width, which gradually widens from the middle of the inter-island connection lines 3 in a direction approaching the pixel islands 2. In practical application, the style of the inter-island connecting lines 3 can be set according to requirements.
As shown in fig. 3, the connecting portion 32 in the present embodiment includes connecting portion edges that are spaced apart from each other in the width direction thereof and are disposed opposite to each other, and the connecting portion edges are curved. The edge of the connecting part 32 of the inter-island connecting wire 3 is set to be an arc line, and the stress acting on the connecting part 32 is further dispersed, so that the stress bearing capacity of the connecting part 32 is enhanced, and the connecting part of the inter-island connecting wire 3 and the pixel island 2 is ensured not to be easily broken.
In addition, the inter-island connection lines 3 are made of a flexible conductive material. For example, the inter-island connecting lines are formed by flexible materials such as silver nanowires, carbon nanotubes, or organic conductive materials. The flexible inter-island connecting line 3 has good tensile property and can ensure effective connection of lines when the display substrate is bent.
Alternatively, the inter-island connection lines 3 may also be curved or zigzag lines, such as horseshoe-shaped, wavy, or zigzag lines, and the inter-island connection lines 3 may be metal lines. Since the stretchability of the metal wires is inferior to that of the flexible wires, if the metal wires are arranged in a linear structure, the overall stretchability of the flexible display substrate 100 is affected, and therefore, the metal wires can be arranged in a curved structure or a zigzag structure, so that the stretchability of the metal wires can be improved, and the effective connection of the wires can be ensured when the flexible display substrate 100 is bent.
It should be noted that: the above two implementations of the inter-island connecting line may be used alone, but may also be used in combination. Namely: the inter-island connecting wires 3 may be linear flexible wires, curved/dog-leg metal wires, or curved/dog-leg flexible wires. The other is not particularly limited as long as the stretchability of the inter-island connecting lines 3 can be improved.
Compared with the prior art, the flexible display substrate 200 provided in the embodiment of the invention provides another replaceable structural style of the pixel island 2, so that the process is simple when the pixel island 2 is prepared.
A third embodiment of the present invention also provides a flexible display device, including the flexible display substrate according to any one of the above embodiments.
A fourth embodiment of the present invention relates to a method of manufacturing a flexible display substrate. As shown in fig. 4, the method for manufacturing a flexible display substrate in this embodiment specifically includes:
step 401: a flexible substrate is provided.
Specifically, the flexible substrate 11 may be formed of a polymer material such as imide (PI), Polycarbonate (PC), Polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), Polyarylate (PAR), or glass Fiber Reinforced Plastic (FRP). The flexible substrate 11 may be transparent, translucent or opaque.
Specifically, the pixel island includes a plurality of edges connected end to end in sequence and forming corners at the connection; the interstrand connecting line includes: and a connection part connecting the main body part and meeting a corner of the pixel island, and the connection part gradually becomes wider from the main body part in a direction approaching the pixel island. The connecting parts of the connecting wires between the islands are connected with the corners of the pixel islands, the connecting parts are set to be gradually widened along the direction close to the pixel islands, the width of the connecting parts of the connecting wires between the islands is wider as the connecting parts are closer to the pixel islands, and therefore when the display substrate achieves stretching display, the stress borne by the connecting wires between the islands and the connecting positions of the pixel islands can be dispersed, the connecting positions of the connecting wires between the islands and the connecting positions of the pixel islands are not prone to fracture, and therefore the reliability of the flexible display substrate during stretching is improved.
Compared with the prior art, the preparation method of the flexible display substrate provided by the embodiment of the invention comprises the following steps: forming a plurality of pixel islands and inter-island connecting lines for communicating adjacent pixel islands on a flexible substrate, wherein each pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connecting positions; the interstrand connecting line includes: and a connection portion connecting the main body portion and contacting a corner of the pixel island, the connection portion gradually becoming wider from the main body portion in a direction approaching the pixel island. The connecting parts of the connecting wires between the islands are connected with the corners of the pixel islands, the connecting parts are set to be gradually widened along the direction close to the pixel islands, the width of the connecting parts of the connecting wires between the islands is wider as the connecting parts are closer to the pixel islands, and therefore when the display substrate achieves stretching display, the stress borne by the connecting wires between the islands and the connecting positions of the pixel islands can be dispersed, the connecting positions of the connecting wires between the islands and the connecting positions of the pixel islands are not prone to fracture, and therefore the reliability of the flexible display substrate during stretching is improved.
The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.
It should be noted that the above embodiments are method embodiments corresponding to embodiments of the flexible display substrate, and therefore, details of implementation in both the first embodiment and the second embodiment can be applied to this embodiment.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
Claims (10)
1. A flexible display substrate, comprising: the pixel structure comprises a flexible substrate, a plurality of pixel islands on the flexible substrate, and inter-island connecting lines for electrically communicating the adjacent pixel islands;
the pixel island comprises a plurality of edges which are sequentially connected end to end and form corners at the connection positions;
the inter-island connection line includes: the pixel structure comprises a main body part and a connecting part which is connected with the main body part and is connected with the corner of the pixel island, wherein the connecting part is gradually widened from the main body part along the direction close to the pixel island.
2. The flexible display substrate of claim 1, wherein the plurality of edges are all arcuate edges.
3. The flexible display substrate of claim 1, wherein the plurality of edges are all straight edges.
4. The flexible display substrate of claim 3, wherein a plurality of the edges enclose a diamond shape.
5. The flexible display substrate of claim 1, wherein the body portion is uniform in width.
6. The flexible display substrate of claim 1, wherein the connecting portion comprises connecting portion edges spaced apart from and opposing each other in a width direction of the connecting portion, and the connecting portion edges are curved.
7. The flexible display substrate of claim 1, wherein the inter-island connecting lines are made of a flexible conductive material.
8. A flexible display device comprising the flexible display substrate according to any one of claims 1 to 7.
9. A method for preparing a flexible display substrate is characterized by comprising the following steps:
forming a plurality of pixel islands and inter-island connecting lines for communicating the adjacent pixel islands on a flexible substrate, wherein the pixel islands comprise a plurality of edges which are sequentially connected end to end and form corners at the connecting positions; the inter-island connection line includes: the pixel structure comprises a main body part and a connecting part which is connected with the main body part and is connected with the corner of the pixel island, wherein the connecting part is gradually widened from the main body part along the direction close to the pixel island.
10. The method of claim 9, wherein the plurality of edges are all arc-shaped edges.
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| CN110289292B (en) * | 2019-06-27 | 2022-04-15 | 京东方科技集团股份有限公司 | Display substrate, display device and manufacturing method of display substrate |
| CN111681546B (en) * | 2019-07-26 | 2022-02-08 | 友达光电股份有限公司 | Element array substrate and display device |
| CN111243442B (en) * | 2020-03-13 | 2021-12-21 | 京东方科技集团股份有限公司 | Display panel and curved surface display device |
| CN111509023B (en) | 2020-05-06 | 2022-05-20 | 京东方科技集团股份有限公司 | Display panel and display device |
| WO2021243553A1 (en) * | 2020-06-02 | 2021-12-09 | Boe Technology Group Co., Ltd. | Display panel and display apparatus |
| CN112054045B (en) * | 2020-08-26 | 2023-11-21 | 合肥维信诺科技有限公司 | Display panel and display device |
| CN112863340A (en) * | 2021-01-12 | 2021-05-28 | 武汉华星光电半导体显示技术有限公司 | Stretchable display module |
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| CN107871761A (en) * | 2016-09-23 | 2018-04-03 | 三星显示有限公司 | Display device and manufacturing method thereof |
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| KR102224743B1 (en) * | 2014-10-21 | 2021-03-09 | 삼성디스플레이 주식회사 | Stretchable organic light emitting display apparatus |
| KR102282492B1 (en) * | 2015-03-10 | 2021-07-27 | 삼성디스플레이 주식회사 | Organic light emitting diode display |
| KR101973163B1 (en) * | 2016-03-22 | 2019-04-29 | 삼성디스플레이 주식회사 | Display device |
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