CN111583804B - Flexible display device and display equipment - Google Patents
Flexible display device and display equipment Download PDFInfo
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- CN111583804B CN111583804B CN202010457421.2A CN202010457421A CN111583804B CN 111583804 B CN111583804 B CN 111583804B CN 202010457421 A CN202010457421 A CN 202010457421A CN 111583804 B CN111583804 B CN 111583804B
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- 238000004804 winding Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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Classifications
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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
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Abstract
The invention relates to the technical field of display, and discloses a flexible display device and display equipment. Wherein, flexible display device includes: the flexible screen is wound on the first reel and can be unfolded along a preset direction; the flexible screen is characterized by further comprising a supporting plate, and when the flexible screen is unfolded, the supporting plate and the flexible screen are mutually attached. Compared with the prior art, the flexible display device and the display equipment provided by the embodiment of the invention have the advantages of reducing the possibility of warping of the flexible screen and improving the flatness of the flexible screen.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display device and display equipment.
Background
Smart terminal devices (such as smart phones, tablet computers, etc.) are developing to have larger display areas, i.e. larger display screens, and to be thinner and more portable. At present, with the wide application of frameless technology, the screen occupation ratio of intelligent terminal equipment, especially a mobile phone, is close to the limit, so that a larger screen is required, and a larger carrying volume is required. Therefore, as a solution that can provide a larger display screen and a smaller carrying volume, the advent and application of foldable display screens, rollable display screens, are inevitable results from the demand.
Compare in the folding mode of intelligent terminal display screen, the mode that the display screen curls and receive and releases more has the development future, can possess big display area when the screen expandes, has the minimum volume of carrying again after the screen rolling. Meanwhile, the technology of the oled (organic light emitting diode) flexible display screen is gradually mature, so that it is possible for the intelligent terminal device to have a scroll-type rollable screen.
However, the inventor of the present invention finds that, in the prior art, when the flexible screen is rolled and stored, the flexible screen body may warp during the stretching process, which greatly reduces the user experience and is easy to cause dust intrusion.
Disclosure of Invention
The embodiment of the invention aims to provide a flexible display device and display equipment, which can effectively reduce the possibility of warping of a flexible screen and improve the flatness of the flexible screen.
To solve the above technical problem, an embodiment of the present invention provides a flexible display device, including: the flexible screen is wound on the first reel and can be unfolded along a preset direction; the flexible screen is characterized by further comprising a supporting plate, and when the flexible screen is unfolded, the supporting plate and the flexible screen are mutually attached.
Embodiments of the present invention also provide a display apparatus comprising a flexible display device as described above.
Compared with the prior art, the flexible screen support device is provided with the support plate, the support plate is attached to the flexible screen when the flexible screen is unfolded, the unfolded flexible screen is supported through the support plate, and the flexible screen is attached to the support plate, so that the possibility of warping of the flexible screen body can be effectively reduced, and the flatness of the flexible screen body is improved.
Preferably, one end of the support plate is fixed on the first reel, and the support plate is wound on the first reel and can be unfolded along the preset direction. The supporting plate is wound on the first reel, so that when the flexible screen is unfolded along the preset direction, the supporting plate can be synchronously unfolded, and the supporting plate can be always kept to be attached to the flexible screen.
Preferably, one surface of the support plate, which is close to the first reel, is provided with a plurality of grooves, and the extending directions of the grooves are perpendicular to the preset direction. Set up a plurality of extending direction and in the backup pad is close to the one side of first spool the recess of direction mutually perpendicular is predetermine, through the stress when recess release backup pad rollback, the warping possibility appears in the effectual reduction backup pad to the warping possibility appears in the indirect flexible screen body that reduces.
Preferably, the winding device further comprises a second winding shaft, one end of the support plate is fixed on the second winding shaft, and the support plate is wound on the second winding shaft and can be unfolded along the preset direction; when the flexible screen is unfolded, the supporting plates are synchronously unfolded, and when the flexible screen is rewound, the supporting plates are synchronously rewound. Through setting up the second spool, establish the backup pad around setting up on the second spool, provide the setting structure of a concrete backup pad.
Preferably, the flexible screen type rolling device further comprises a moving part, the other end of the supporting plate is fixed to the moving part, the other end of the flexible screen is fixed to the moving part, and the moving part drives the flexible screen and the supporting plate to be unfolded or rewound when moving. Fix backup pad and flexible screen on same moving part, drive flexible screen and backup pad through the moving part and expand or rollback for when the flexible screen is expanded along predetermineeing the direction, the backup pad can expand in step, thereby guarantees that the backup pad can keep laminating setting with the flexible screen all the time.
Preferably, one surface of the support plate, which is close to the second reel, is provided with a plurality of grooves, and the extending directions of the grooves are perpendicular to the preset direction. Set up a plurality of extending direction and in the backup pad is close to the one side of second spool the recess of direction mutually perpendicular is predetermine, through the stress when recess release backup pad rollback, the warping possibility appears in the effectual reduction backup pad to the indirect flexible screen body that reduces appears the warping possibility.
Preferably, the flexible screen further comprises a fitting component, a recess is formed in the surface of one side, close to the flexible screen, of the supporting plate, and the fitting component is communicated with the recess; the laminating subassembly is used for when the flexible screen expandes, extracts the gas in the sunken so that the backup pad with the flexible screen laminates each other. When the flexible screen is unfolded, the gas in the recess is extracted through the fitting component, so that a negative pressure environment is formed in the recess, and the flexible screen and the supporting plate are fitted and arranged under the action of the atmospheric pressure.
Preferably, the attaching assembly comprises a chamber with an air inlet and a piston arranged in the chamber, the air inlet is communicated with the recess, and the piston is fixed on the movable member; when the movable piece drives the flexible screen to be unfolded, the piston is driven to extract the gas in the recess. Fix the piston on the moving part, when removing the moving part and drive flexible screen and expand, the piston synchronous motion can reach the effect of extracting gaseous in sunken, need not to set up extra power supply, simplifies the setting of laminating subassembly.
Preferably, the attaching assembly further comprises a switch valve; the switch valve is used for sealing the chamber when the flexible screen is unfolded and communicating the chamber with the outside when the flexible screen is rewound. The switch valve is arranged to communicate the chamber with the outside when the flexible screen is rewound, so that the air pressure inside and outside the recess is balanced, and the support plate and the flexible screen are separated from each other.
Preferably, the attaching assembly comprises a chamber with an air port and a piston arranged in the chamber, the air port is communicated with the recess, and the piston is fixed on the first reel; when the flexible screen is unfolded, the first reel drives the piston to extract gas in the recess. Fix the piston on first spool, when flexible screen expandes, first spool rotates to drive piston synchronous movement and can reach the effect of extracting gas in sunken, need not to set up extra power supply, simplify the setting of laminating subassembly.
Preferably, the supporting plate is a telescopic structure which can be stretched and retracted along the preset direction; when the flexible screen is unfolded along the preset direction, the supporting plate is stretched along the preset direction.
Preferably, the supporting plate comprises a first telescopic part and a second telescopic part sleeved on the first telescopic part; when the supporting plate is contracted, the first telescopic part is embedded into the second telescopic part.
Drawings
Fig. 1 is a schematic structural view of a flexible display device according to a first embodiment of the present invention when it is rolled;
fig. 2 is a schematic structural diagram of a flexible display device according to a first embodiment of the present invention when it is unfolded;
fig. 3 is a schematic structural diagram of a flexible display device according to a second embodiment of the present invention when it is unfolded;
fig. 4 is a schematic structural diagram of a flexible display device according to a third embodiment of the present invention when it is unfolded;
fig. 5 is a schematic structural diagram of a flexible display device according to a fourth embodiment of the present invention when the flexible display device is unfolded.
Detailed Description
In order to make the objects, technical solutions and advantages 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.
A first embodiment of the present invention relates to a flexible display device. The specific structure is shown in fig. 1 and fig. 2, and comprises: a first reel 10, a flexible screen 20 and a support plate 30. Wherein, one end of the flexible screen 20 is fixed on the first reel 10, and the flexible screen 20 is wound on the first reel 10 and can be unfolded along a preset direction (for example, fig. 1 is a schematic structural diagram of the flexible screen 20 wound on the first reel 10, and fig. 2 is a schematic structural diagram of the flexible screen 20 after being unfolded along the preset direction); in addition, when the flexible screen 20 is unfolded in the preset direction, the support plate 30 and the flexible screen 20 are disposed to be attached to each other.
Compared with the prior art, in the flexible display device that this application first embodiment provided, through setting up backup pad 30, when flexible screen 20 expanded along predetermineeing the direction, backup pad 30 and flexible screen 20 set up of laminating each other, support flexible screen 20 with the help of backup pad 30 to reduce flexible screen 20 and appear the possibility of warping, promote flexible screen 20's roughness.
Preferably, in the present embodiment, one end of the support plate 30 is fixed to the first winding shaft 10, and the support plate 30 is wound around the first winding shaft 10 and can be unwound in a predetermined direction. The support plate 30 is wound on the first reel 10, so that when the flexible screen 20 is unfolded, the support plate 30 can be synchronously unfolded, and the support plate 30 can be always attached to the flexible screen 20.
Preferably, as shown in fig. 2, a plurality of grooves 31 are formed on a surface of the support plate 30 adjacent to the first winding shaft 10, and the grooves 31 extend in a direction perpendicular to a predetermined direction (i.e., a direction perpendicular to the paper surface in fig. 2). A plurality of grooves 31 with the extending directions perpendicular to the preset direction are formed in one surface, close to the first reel 10, of the supporting plate 30, stress generated when the supporting plate 30 is rewound is released through the grooves 31, the possibility of warping of the supporting plate 30 is effectively reduced, and therefore the possibility of warping of the flexible screen 20 is indirectly reduced.
Preferably, in the present embodiment, a fitting assembly 40 is further included, a plurality of recesses 32 are provided on a side surface of the support plate 30 close to the flexible screen 20, and the fitting assembly 40 is communicated with the recesses 32. Wherein, the attaching component 40 is used for extracting the gas in the recess 32 when the flexible screen 20 is unfolded, so that a negative pressure environment is formed in the recess 32, and the supporting plate 30 and the flexible screen 20 are attached to each other under the action of the external atmospheric pressure. It should be understood that the aforesaid arrangement of the plurality of recesses 32 on the side surface of the support plate 30 close to the flexible screen 20 is only a specific example in this embodiment, and is not a limitation, and in other embodiments of the present invention, a plurality of suction holes penetrating through the support plate 30 may be arranged on the support plate 30, one end of each suction hole is open close to the flexible screen 20, and the other end is open and communicated with the attaching component 40, when the flexible screen 20 is unfolded, the attaching component 40 extracts gas in the suction hole through the opening communicated with the suction hole, so as to form a negative pressure environment in the suction hole, and under the action of the external atmospheric pressure, the support plate 30 and the flexible screen 20 are attached to each other.
Preferably, in the present embodiment, the attaching assembly 40 includes a chamber 41, a piston 42 disposed in the chamber 41, the chamber 41 having an air inlet 43, the air inlet 43 communicating with the recess 32 via a conduit 44, the piston 42 being fixed to the first reel 10. When the flexible screen 20 is unfolded, the first reel 10 rotates to drive the piston 42 to move, and the gas in the recess 32 is pumped into the chamber 41, so that a negative pressure environment is formed in the recess 32, and the support plate 30 and the flexible screen 20 are attached to each other under the action of the external atmospheric pressure. Fix piston 42 on first spool 10, when flexible screen 20 expandes, first spool 10 rotates to drive piston 42 synchronous motion and can reach the effect of extracting gas in the sunken, need not to set up extra power supply, simplify the setting of laminating subassembly. It will be appreciated that the foregoing fixed connection of the piston 42 to the first reel 10 is merely a specific illustration of the present embodiment. Without limitation, in other embodiments of the present invention, an additional power component, such as a motor, etc., may be provided to drive the piston to move so as to extract the gas in the recess 32, which is not illustrated herein, and may be flexibly provided according to actual needs.
Preferably, in the present embodiment, the attaching assembly 40 further includes an on-off valve 45. The switch valve 45 is used for sealing the chamber 41 when the flexible screen 20 is unfolded, so that the chamber 41 is not communicated with the external atmosphere, and a negative pressure environment is formed in the chamber 41 and the recess 32; and to vent the chamber 41 to the ambient atmosphere when the flexible screen 20 is rewound. When the flexible screen 20 is rolled back, the chamber 41 is communicated with the outside atmosphere, and the air pressure inside and outside the chamber 41 and the recess 32 is balanced, so that the flexible screen 20 and the support plate 30 can be conveniently separated.
A second embodiment of the present invention relates to a flexible display device. The second embodiment is substantially the same as the first embodiment, and mainly differs therefrom in that: as shown in fig. 3, a second embodiment of the present invention includes a movable element 50, including all the structures of the first embodiment. Wherein one end of the flexible screen 20 and one end of the supporting plate 30 are fixed on the movable member 50. The moving member 50 moves to cause the flexible screen 20 and the support plate 30 to unwind or rewind.
Compared with the prior art, the flexible display device provided by the second embodiment of the invention maintains all technical effects of the first embodiment, and simultaneously fixes the support plate 30 and the flexible screen 20 on the same movable element 50, and drives the flexible screen 20 and the support plate 30 to be unfolded or rewound through the movable element 50, so that when the flexible screen 20 is unfolded along a preset direction, the support plate 30 can be synchronously unfolded, and the support plate 30 can be ensured to be always attached to the flexible screen 20.
Preferably, in the present embodiment, the piston 42 is fixedly connected to the movable member 50. The piston 42 is fixedly connected with the movable element 50, and when the movable element 50 drives the flexible screen 20 and the support plate 30 to unfold, the piston 42 is driven to move, so that the gas in the recess 32 is pumped into the chamber 41, a negative pressure environment is formed in the recess 32, and the flexible screen 20 is pressed on the support plate 30 under the action of the external atmospheric pressure. The piston 42 is driven by the movable element 50 to move, so that an additional power source is not required, and the arrangement of the attaching assembly 40 is effectively simplified. It should be understood that the foregoing is merely an example of a specific installation method of the bonding module 40 in the present embodiment, and is not limited thereto, and in other embodiments of the present invention, other methods such as installing a power source such as a motor to move the piston 42 may be used.
A third embodiment of the present invention relates to a flexible display device, and is substantially the same as the first embodiment, and mainly differs therefrom in that: as shown in fig. 4, a third embodiment of the present invention includes the entire structure of the first embodiment and also includes a second reel 60. One end of the support plate 30 is fixed on the second reel 60, the support plate 30 is wound on the second reel 60 and can be unfolded along a preset direction, when the flexible screen 20 is unfolded along the preset direction, the support plate 30 is synchronously unfolded, and when the flexible screen 20 is rewound, the support plate 30 is synchronously rewound.
Compared with the prior art, the flexible display device provided by the third embodiment of the present invention provides a different arrangement structure of the support plate 30 from the first embodiment by arranging the second reel 60 and winding the support plate 30 on the second reel 60 while maintaining all technical effects of the first embodiment.
Preferably, a plurality of grooves 31 are formed on a surface of the support plate 30 adjacent to the second winding shaft 60, and the grooves 31 extend in a direction perpendicular to the predetermined direction. The plurality of grooves 31 with the extending directions perpendicular to the preset direction are arranged on one surface, close to the second scroll 60, of the support plate 30, the stress generated when the support plate 30 is rewound is released through the grooves 31, the possibility of warping of the support plate 30 is effectively reduced, and therefore the possibility of warping of the flexible screen 20 is indirectly reduced.
A fourth embodiment of the present invention relates to a flexible display device, and is substantially the same as the first embodiment, and mainly differs therefrom in that: as shown in fig. 5, in the fourth embodiment of the present invention, the supporting plate 30 is a telescopic structure capable of being extended and retracted along a predetermined direction. When the flexible screen 20 is unfolded in the predetermined direction, the supporting plate 30 is stretched in the predetermined direction.
Compared with the prior art, the flexible display device provided by the fourth embodiment of the invention, while maintaining the technical effects of the first embodiment, does not need to curl the supporting plate 30 by setting the supporting plate 30 to be a telescopic structure, effectively avoids the phenomenon that the supporting plate 30 warps due to stress generated by curling, and indirectly reduces the possibility that the flexible screen warps.
Preferably, in the present embodiment, the support plate 30 includes the first stretchable and contractible portion 33 and the second stretchable and contractible portion 34, and when the support plate 30 is contracted, the first stretchable and contractible portion 33 is fitted into the second stretchable and contractible portion 34. It should be understood that the support plate 30 including the first and second extendable portions 33 and 34 is only an example of a specific application in the present embodiment, and is not limited thereto, and in other embodiments of the present invention, the support plate 30 may include a plurality of extendable portions or the support plate 30 may be an elastic member, and may be flexibly disposed according to actual needs, which is not illustrated herein.
A fifth embodiment of the present invention is directed to a display apparatus including the flexible display device as provided in the previous embodiments.
Compared with the prior art, the display device provided by the fifth embodiment of the present invention includes the flexible display apparatus provided by the foregoing embodiments, and therefore, the display device provided by the fifth embodiment of the present invention also has the technical effects of the foregoing embodiments, and further description is omitted here.
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 (9)
1. A flexible display device, comprising:
the flexible screen is wound on the first reel and can be unfolded along a preset direction;
the flexible screen is characterized by further comprising a supporting plate, wherein the supporting plate can be unfolded along the preset direction, and when the flexible screen is unfolded, the supporting plate and the flexible screen are attached to each other;
the flexible screen is fixed on the movable piece, and the movable piece drives the flexible screen and the supporting plate to be unfolded or rewound when moving;
the flexible screen is characterized by further comprising a fitting component, a recess is formed in the surface of one side, close to the flexible screen, of the supporting plate, and the fitting component is communicated with the recess;
the fit assembly comprises a cavity with an air inlet and a piston arranged in the cavity, the air inlet is communicated with the recess, and the piston is fixed on the movable piece;
when the movable piece drives the flexible screen to be unfolded, the piston is driven to extract the gas in the recess.
2. The flexible display device according to claim 1, wherein one end of the support plate is fixed on the first winding shaft, and the support plate is wound on the first winding shaft.
3. The flexible display device according to claim 1, wherein the extending direction of the recess is perpendicular to the predetermined direction.
4. The flexible display device according to claim 1, further comprising a second reel, wherein the other end of the support plate is fixed to the second reel, and the support plate is wound around the second reel.
5. The flexible display device of claim 1, wherein the conformable assembly further comprises an on-off valve;
the switch valve is used for sealing the chamber when the flexible screen is unfolded and communicating the chamber with the outside when the flexible screen is rewound.
6. The flexible display device of claim 1, wherein the conformable assembly comprises a chamber having a gas port in communication with the recess and a piston disposed within the chamber, the piston being secured to the first roller;
when the flexible screen is unfolded, the first reel drives the piston to extract gas in the recess.
7. The flexible display device as claimed in claim 1, wherein the supporting plate is a retractable structure that can be extended and retracted along the predetermined direction, and when the flexible screen is extended along the predetermined direction, the supporting plate is stretched along the predetermined direction.
8. The flexible display device of claim 7, wherein the support plate comprises a first flexible portion and a second flexible portion sleeved on the first flexible portion, and when the support plate is retracted, the first flexible portion is embedded in the second flexible portion.
9. A display device, comprising: a flexible display device according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010457421.2A CN111583804B (en) | 2020-05-26 | 2020-05-26 | Flexible display device and display equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010457421.2A CN111583804B (en) | 2020-05-26 | 2020-05-26 | Flexible display device and display equipment |
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| CN111583804A CN111583804A (en) | 2020-08-25 |
| CN111583804B true CN111583804B (en) | 2022-03-08 |
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| CN202010457421.2A Active CN111583804B (en) | 2020-05-26 | 2020-05-26 | Flexible display device and display equipment |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112466213B (en) * | 2020-12-03 | 2022-08-19 | 合肥维信诺科技有限公司 | Display device |
| CN114697431A (en) * | 2020-12-31 | 2022-07-01 | Oppo广东移动通信有限公司 | Electronic device |
| CN115148090B (en) * | 2021-03-31 | 2024-01-19 | Oppo广东移动通信有限公司 | Display device |
| CN113380149B (en) * | 2021-06-24 | 2023-02-28 | 合肥维信诺科技有限公司 | Screen body crimping mechanism and crimpable device |
| CN113516919B (en) * | 2021-07-27 | 2023-04-18 | 京东方科技集团股份有限公司 | Flexible supporting assembly and flexible display device |
| CN113888969B (en) * | 2021-09-23 | 2023-10-13 | 武汉天马微电子有限公司 | Flexible display device and electronic equipment |
| CN114220354B (en) * | 2021-12-30 | 2023-10-31 | 合肥维信诺科技有限公司 | Flexible display device and mobile terminal |
| CN114241923A (en) * | 2022-01-18 | 2022-03-25 | 惠州视维新技术有限公司 | Display device |
| CN114927065B (en) * | 2022-06-07 | 2023-06-20 | 武汉天马微电子有限公司 | Display device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201128594A (en) * | 2010-02-11 | 2011-08-16 | Ind Tech Res Inst | Flexible display device |
| CN104714699A (en) * | 2015-04-13 | 2015-06-17 | 京东方科技集团股份有限公司 | Flexible display device |
| CN106131251B (en) * | 2016-07-08 | 2018-07-06 | 广东欧珀移动通信有限公司 | Flexible screen support construction, flexible display screen module and mobile terminal |
| CN106981254A (en) * | 2017-03-30 | 2017-07-25 | 上海创功通讯技术有限公司 | Flexible screen display device |
| CN109630842A (en) * | 2019-01-30 | 2019-04-16 | 武汉华星光电半导体显示技术有限公司 | The support construction of flexible display screen |
| CN210181960U (en) * | 2019-06-06 | 2020-03-24 | 深圳市柔宇科技有限公司 | Flexible display device and electronic equipment |
| CN110491289B (en) * | 2019-07-29 | 2024-03-15 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN110675747B (en) * | 2019-09-16 | 2021-01-01 | 武汉华星光电半导体显示技术有限公司 | Foldable display device |
| CN110658890B (en) * | 2019-09-26 | 2021-07-16 | 联想(北京)有限公司 | Flexible display structure and electronic equipment |
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