CN109616017B - Flexible display screen and flexible display device - Google Patents
Flexible display screen and flexible display device Download PDFInfo
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- CN109616017B CN109616017B CN201910012920.8A CN201910012920A CN109616017B CN 109616017 B CN109616017 B CN 109616017B CN 201910012920 A CN201910012920 A CN 201910012920A CN 109616017 B CN109616017 B CN 109616017B
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- flexible display
- display screen
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- dam
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The invention relates to the technical field of display, and discloses a flexible display screen and a flexible display device. When using above-mentioned flexible display screen, need to buckle regional bending type so that connect back lead wire or other structures, when carrying out the operation of buckling to the region of buckling, very easily appear the crackle from the chamfer department of the regional limit portion of buckling, and the crackle extends to the display area by chamfer department, and be equipped with crackle stop part between bending type and the display area, this crackle stop part can block the crackle that extends to the display area by chamfer department to maintain the normal demonstration in display area, promote flexible display screen's life.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display screen and a flexible display device.
Background
At present, flexible displays are increasingly popular, however, flexible display screens also have many problems that are difficult to surmount in the process, for example, after a plate bending process, cracks are easily formed due to stress concentration at a chamfer, and extend to each line, so that screen flashing, black screen, abnormal display or poor display and the like can be caused.
Disclosure of Invention
The invention provides a flexible display screen and a flexible display device.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a flexible display screen, includes the display screen body, the display screen body has bending region and display area, bending region's limit portion is formed with the chamfer, just bending region with be equipped with between the display area and be used for blockking the crackle stop part that the crackle extends.
Among the above-mentioned flexible display screen, flexible display screen includes the display screen body, and the display screen body has regional and the display area of buckling, and wherein, the regional limit portion of buckling is formed with the chamfer. When using above-mentioned flexible display screen, need to buckle regional bending type so that connect back lead wire or other structures, when carrying out the operation of buckling to the region of buckling, very easily appear the crackle from the chamfer department of the regional limit portion of buckling, and the crackle extends to the display area by chamfer department, and be equipped with crackle stop part between bending type and the display area, this crackle stop part can block the crackle that extends to the display area by chamfer department to maintain the normal demonstration in display area, promote flexible display screen's life.
The flexible display screen provided by the invention is provided with the crack blocking part between the bending area and the display area, and the crack blocking part can effectively block the extension of cracks so as to ensure the normal display of the display area and prevent the phenomena of screen flashing, black screen, abnormal display or poor display and the like.
Therefore, the flexible display screen is convenient for improving the display effect and the service life of the flexible display screen by changing the structure of the flexible display screen.
Preferably, the crack stopper includes a stopper dam formed of a plurality of strip-shaped grooves; and/or the presence of a gas in the gas,
the crack barrier includes a barrier wall formed of a plurality of columns.
Preferably, the crack barrier includes the barrier dam and the barrier wall, the barrier wall is disposed on a side of the barrier dam facing the display area, and the plurality of pillars are arranged along an extending direction of the bar-shaped groove.
Preferably, the crack barrier includes the barrier dam and the barrier wall, the columns in the barrier wall form a multi-row structure, each row of columns is arranged along the extending direction of the strip-shaped groove, and the columns in two adjacent rows are staggered.
Preferably, the distance between every two adjacent columns in each row is smaller than the diameter of each column.
Preferably, the crack barrier includes the barrier dam and the barrier wall, the barrier wall is disposed in the barrier dam, and the plurality of columns are arranged along the extending direction of the strip-shaped groove.
Preferably, the spacing distance between every two adjacent columns is equal to the diameter of each column.
Preferably, the width of the blocking dam is 50-58 μm and the diameter of each column is 35-40 μm in the direction perpendicular to the extension direction of the strip-shaped groove.
Preferably, the material for preparing each column in the barrier wall is metal.
The invention also provides a flexible display device which comprises any one of the flexible display screens provided by the technical scheme.
Drawings
Fig. 1 is a structural diagram of a flexible display screen provided in an embodiment of the present invention;
FIG. 2 is an enlarged view of the blocking wall of FIG. 1;
FIG. 3 is a schematic diagram of a film structure of the flexible display panel shown in FIG. 1;
FIG. 4 is a diagram of a flexible display according to an embodiment of the present invention;
FIG. 5 is an enlarged view of the structure of the dam and the barrier wall shown in FIG. 4;
fig. 6 is a schematic diagram of a film structure of the flexible display screen in fig. 4.
Icon: 1-a bending region; 11-chamfering; 2-a display area; 3-a crack stop; 31-a blocking dam; 32-barrier walls; 321-a column; 100-a base film layer; 200-a first gate insulating layer; 300-a second gate insulating layer; 400-an interlayer dielectric layer; 500-source drain; 600-flat layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a flexible display screen, which includes a display screen body, the display screen body has a bending region 1 and a display region 2, a chamfer 11 is formed at an edge of the bending region 1, and a crack stop portion 3 for stopping crack extension is disposed between the bending region 1 and the display region 2.
Among the above-mentioned flexible display screen, flexible display screen includes the display screen body, and the display screen body has bending region 1 and display area 2, and wherein, bending region 1's limit portion is formed with chamfer 11. When the flexible display screen is applied, the bending area 1 needs to be bent so as to be connected with a back lead or other structures, when the bending area 1 is bent (the bending direction is shown as a direction in fig. 1), cracks are easy to appear from a chamfer 11 at the edge of the bending area 1 and extend from the chamfer 11 to the display area 2, a crack blocking part 3 is arranged between the bending area 1 and the display area 2, the crack blocking part 3 can block the cracks extending from the chamfer 11 to the display area 2, so that normal display of the display area 2 is maintained, and the service life of the flexible display screen is prolonged.
According to the flexible display screen provided by the invention, the crack blocking part 3 is arranged between the bending area 1 and the display area 2, and the crack blocking part 3 can effectively block the extension of cracks so as to ensure the normal display of the display area 2 and prevent the phenomena of screen flashing, black screen, abnormal display or poor display and the like.
Therefore, the flexible display screen is convenient for improving the display effect and the service life of the flexible display screen by changing the structure of the flexible display screen.
On the basis of the above technical solution, it should be noted that there are many possibilities for the structure of the crack barrier 3, at least one of the following structures:
the structure I is as follows:
the crack stopper 3 includes a stopper dam 31 formed of a plurality of strip-shaped grooves.
Specifically, when the bending region 1 is bent, after cracks are generated at the chamfer 11 of the bending region 1, the cracks gradually extend towards the display region 2, and the blocking dam 31 formed by the plurality of strip-shaped grooves between the display region 2 and the bending region 1 blocks the cracks, so that the extending speed of the cracks can be reduced, the extending direction of the cracks can be changed, and even the extending of the cracks to the display region 2 can be blocked.
The structure II is as follows:
the crack barrier 3 includes barrier walls 32 formed of a plurality of columns 321.
Specifically, when the bending region 1 is bent, after cracks are generated at the chamfer 11 of the bending region 1, the cracks gradually extend toward the display region 2, and the barrier walls 32 formed by the plurality of columns 321 between the display region 2 and the bending region 1 block the cracks, so that the extending speed of the cracks can be reduced, the extending direction of the cracks can be changed, and even the extending of the cracks toward the display region 2 can be blocked.
It should be noted that, referring to fig. 2, since the barrier wall 32 is formed by a plurality of pillars 321, when the crack reaches the pillars 321, the crack tip is passivated at the pillars 321 because the pillars 321 block the crack traveling direction, and this tip passivation process can reduce the crack propagation speed and even completely block the crack from extending to the display area 2.
The structure is as follows:
the crack barrier 3 includes a barrier dam 31 formed of a plurality of stripe-shaped grooves, and the crack barrier 3 includes a barrier wall 32 formed of a plurality of columns 321.
It should be noted that, when the crack barrier 3 includes both the barrier dam 31 and the barrier wall 32, the arrangement positions of the barrier dam 31 and the barrier wall 32 have various forms:
the first form: referring to fig. 1, the crack barrier 3 includes a barrier dam 31 and a barrier wall 32, the barrier wall 32 is disposed on a side of the barrier dam 31 facing the display area 2, and the plurality of columns 321 are arranged along an extending direction of the strip-shaped groove.
Specifically, when the bending region 1 is bent, after cracks are generated at the chamfer 11 of the bending region 1, the cracks gradually extend towards the display region 2, the blocking dam 31 formed by the plurality of cylinders 321 between the display region 2 and the bending region 1 primarily blocks the cracks, and when the cracks cross the blocking dam 31, the blocking wall 32 secondarily blocks the cracks.
It should be noted that, this structure utilizes the barrier dam 31 and the barrier wall 32 to form dual protection for the display area 2, so as to better reduce the extension speed of the crack or change the extension direction of the crack, even block the extension of the crack to the display area 2.
The second form: with reference to fig. 1, the crack barrier 3 includes the barrier dam 31 and the barrier wall 32, the columns 321 in the barrier wall 32 form a multi-row structure, each row of columns 321 is arranged along the extending direction of the strip-shaped groove, and the columns 321 in two adjacent rows are staggered.
Specifically, when the bending region 1 is bent, cracks are generated at the chamfer 11 of the bending region 1, the cracks gradually extend towards the display region 2, the blocking dam 31 formed by the plurality of cylinders 321 positioned between the display region 2 and the bending region 1 primarily blocks the cracks, after the cracks cross the blocking dam 31, the first row of cylinders 321 facing one side of the blocking dam 31 in the multi-row structure in the blocking wall 32 form secondary blocking of the cracks, and as the cylinders 321 block the advancing direction of the cracks, the crack tips are passivated at the cylinders 321, the tip passivation process can reduce the propagation speed of the cracks, and even completely block the extension of the cracks towards the display region 2.
In addition, because the columns 321 in the blocking wall 32 form a multi-row structure, each row of columns 321 is arranged along the extending direction of the strip-shaped groove, and the columns 321 in two adjacent rows are staggered, taking the multi-row structure as two rows as an example:
after the crack crosses the first row of pillars 321, the second row of pillars 321 may passivate the tip of the crack again, or block the crack, and this structure may form a better protection for the display area 2, reduce the possibility of the crack extending to the display area 2, and improve the service life of the display area 2.
Specifically, when the column 321 in the blocking wall 32 is provided, it is possible to provide: the distance between every two adjacent columns 321 in each row is less than the diameter of each column 321.
It should be noted that, with continued reference to fig. 2, for the multi-row structure, because the columns 321 in two adjacent rows are staggered, the above structure can reduce the possibility of the crack crossing the barrier wall 32, and if the crack crosses the gap between the columns 321 in the first row, the crack will reach the columns 321 in the second row adjacent to the columns 321 in the first row.
With reference to fig. 3, a specific method for preparing the blocking wall 32 and the blocking dam 31 in the present embodiment is now provided:
the first step is as follows: preparing an edge film structure according to a normal process at present, namely sequentially preparing a basic film 100 (which may include a polyimide layer, a barrier layer and a buffer layer) on a flexible substrate, and then sequentially preparing a first gate insulating layer 200, a second gate insulating layer 300 and an interlayer dielectric layer 400;
The second step: etching by using a redesigned mask for preparing the interlayer dielectric layer 400, wherein the redesigned mask for preparing the interlayer dielectric layer 400 is a mask with a circular hole, which is prepared according to a set distance and size, and the circular hole is etched on one side of the blocking dam 31 facing the display area 2 through the mask, and the etching parameters are processed according to the current process;
the third step: and depositing a source and drain electrode 500 layer on the surface of the film layer formed after the second step, and similarly, etching by using a redesigned source and drain electrode 500 mask (circular shielding is designed at the position corresponding to the hole digging position in the second step), so that the source and drain electrode 500 layer at other positions except the hole is removed.
The fourth step: the normal process is followed while the hole position remains the planarization layer 600.
As can be seen from the above-described solutions, this embodiment does not require the addition or subtraction of reticles, but requires minor modifications to the original reticles.
It should be noted that the distance between the circular holes of the mask can be set to 8 μm, and the diameter of each circular hole is 10 μm.
The third form: referring to fig. 4, the crack stopper 3 includes a stopper 31 and a stopper wall 32, the stopper wall 32 is disposed in the stopper 31, and the plurality of columns 321 are arranged along the extending direction of the stripe-shaped groove.
Specifically, when the bending region 1 is bent, after cracks are generated at the chamfer 11 of the bending region 1, the cracks gradually extend towards the display region 2, the blocking dam 31 formed by the plurality of cylinders 321 between the display region 2 and the bending region 1 primarily blocks the cracks, and meanwhile, the blocking wall 32 formed by the plurality of cylinders 321 secondarily blocks the cracks.
It should be noted that, the blocking wall 32 is disposed in the blocking dam 31, so that the space can be saved, the blocking wall 32 is prevented from occupying other space, and the arrangement of other structures in the flexible display screen is facilitated.
On the basis of the technical scheme, the method can specifically comprise the following steps: the distance between every two adjacent columns 321 is equal to the diameter of each column 321.
In addition, referring to fig. 5, the width L of the blocking dam 31 is 50 to 58 μm and the diameter D of each column 321 is 35 to 40 μm along the extending direction of the vertical bar-shaped groove, for example: the width of the blocking dam 31 may be selected to be 54 μm.
On the basis of the above technical solutions, as a preferred embodiment, the following are selected: each of the pillars 321 in the barrier wall 32 is made of metal.
Similarly, a schematic diagram of the film layer structure of the flexible display panel in the third form is shown in fig. 6.
It should be noted that the metal may enhance the blocking capability of the inner cylinder of the blocking wall 32 corresponding to the crack.
The invention also provides a flexible display device which comprises any one of the flexible display screens provided by the technical scheme.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. The flexible display screen is characterized by comprising a display screen body, wherein the display screen body is provided with a bending area and a display area, a chamfer is formed at the edge of the bending area, and a crack blocking part for blocking crack extension is arranged between the bending area and the display area;
the crack stopper includes a stopper dam formed of a plurality of strip grooves; and the combination of (a) and (b),
the crack barrier part comprises a barrier wall formed by a plurality of columns;
it locates to block the wall block in the dam, and a plurality of the cylinder is followed bar groove's extending direction arranges, every the cylinder orientation there is at least one on chamfer one side bar groove, every the cylinder deviates from there is at least one on chamfer one side bar groove, and adjacent two there is at least one between the cylinder bar groove.
2. The flexible display of claim 1, wherein a separation distance between each adjacent two of the posts is equal to a diameter of each of the posts.
3. The flexible display screen of claim 2, wherein the width of the blocking dam is 50-58 μm and the diameter of each column is 35-40 μm in a direction perpendicular to the extension direction of the strip-shaped groove.
4. A flexible display screen according to any one of claims 1 to 3 wherein each column within the barrier wall is made of metal.
5. A flexible display device, comprising a flexible display screen according to any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012920.8A CN109616017B (en) | 2019-01-07 | 2019-01-07 | Flexible display screen and flexible display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910012920.8A CN109616017B (en) | 2019-01-07 | 2019-01-07 | Flexible display screen and flexible display device |
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| CN109616017B true CN109616017B (en) | 2022-06-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556411B (en) * | 2019-09-25 | 2021-11-30 | 云谷（固安）科技有限公司 | Display panel capable of being wound and preparation method thereof |
| CN111710245B (en) | 2020-07-17 | 2022-05-20 | 京东方科技集团股份有限公司 | Flexible display panel, preparation method thereof, display device and display module |
| CN111798759B (en) * | 2020-07-17 | 2021-12-28 | 京东方科技集团股份有限公司 | Flexible display device and electronic equipment |
| CN114822266B (en) * | 2022-05-17 | 2024-01-12 | 昆山国显光电有限公司 | Display module and display device |
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| CN108832017A (en) * | 2018-06-07 | 2018-11-16 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof, display module, electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102362819B1 (en) * | 2015-03-23 | 2022-02-14 | 삼성디스플레이 주식회사 | Flexible display device |
| KR20160127892A (en) * | 2015-04-27 | 2016-11-07 | 삼성디스플레이 주식회사 | Flexible substrate and display device including the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20170038984A (en) * | 2015-09-30 | 2017-04-10 | 엘지디스플레이 주식회사 | Organic light emitting display device |
| CN107863376A (en) * | 2017-12-11 | 2018-03-30 | 京东方科技集团股份有限公司 | A kind of flexible display substrates, display panel and display device |
| CN108198950A (en) * | 2017-12-28 | 2018-06-22 | 武汉华星光电半导体显示技术有限公司 | The edge plot structure of flexible display panels, flexible display panels |
| CN108832017A (en) * | 2018-06-07 | 2018-11-16 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof, display module, electronic device |
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