CN109859632A - Display screen - Google Patents
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- CN109859632A CN109859632A CN201910199207.9A CN201910199207A CN109859632A CN 109859632 A CN109859632 A CN 109859632A CN 201910199207 A CN201910199207 A CN 201910199207A CN 109859632 A CN109859632 A CN 109859632A
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- viscous glutinous
- adhesive portion
- display screen
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Abstract
The present invention provides a kind of display screen, which includes bearing bed, display panel and adhesive portion, and wherein display panel has bending part, both ends of the adhesive portion for the bending part of fixed display panel.The present invention also provides a kind of display screen, which includes display panel, buffer layer, driving chip, viscous glutinous portion and flexible circuit board, and wherein flexible circuit board has bending part, and viscous glutinous portion is used to fix the both ends of the bending part of flexible circuit board.Above-mentioned display screen can prevent the both ends of the bending part of display screen to be stripped, improve the yield of display screen by setting adhesive portion or viscous glutinous portion.
Description
Technical field
The present invention relates to field of display technology, more particularly to a kind of display screen.
Background technique
With the development of display technology, the display screen with narrow frame is more and more welcomed by the people.Wherein it is possible to realize
The display screen packaging technology of narrow frame includes COF (Chip on Film, flip chip) technique and COP (Chip on Pi, flexibility
Chip package on substrate) technique.
In COF technique, FPC (Flexible Printed Circuit, flexible circuit board) is arranged on a display panel, drives
Dynamic IC (Integrated circuit, chip) is fixed on FPC, after FPC bending, makes that IC is driven to be arranged under display screen
Side.Directly driving IC is arranged in flexible display panels for COP technique, then bends flexible display panels, also makes to drive IC
The lower section of display screen is set.
The above-mentioned display screen made through COF technique or COP technique makes to drive IC by bending FPC or bending display panel
The lower section of display screen is set, achievees the effect that narrow frame.However, the display screen made through COF technique or COP technique, is all deposited
In the flaky problem in the both ends of bending part.
Summary of the invention
The purpose of the present invention is to provide a kind of display screens, improve the yield of display screen.
The embodiment of the invention provides a kind of display screens comprising: bearing bed, display panel and adhesive portion, it is described aobvious
Show that panel includes the first fixed area, the second fixed area, and is arranged between first fixed area and second fixed area
Buckled zone, the adhesive portion include the first adhesive portion and the second adhesive portion；
First fixed area and second fixed area are separately positioned on the two sides of the bearing bed, make the display surface
Plate and the bearing bed are fixedly installed；
The buckled zone is formed by bending the curved space；
First adhesive portion and second adhesive portion are arranged in the curved space, the first adhesive portion setting
In the buckled zone close to the side of first fixed area, the second adhesive portion setting is in the buckled zone close to described the
The side of two fixed areas.
The adhesive portion connects the area of side with the bearing bed and the bearing bed connects with adhesive portion side
Area ratio be greater than 50 percent.
In one embodiment, the buckled zone is equipped with through-hole, and the through-hole is used to import the composition material of the adhesive portion,
Form the adhesive portion.
In one embodiment, the through-hole includes first through hole and the second through-hole；
The buckled zone is arranged in close to the side of first fixed area in the first through hole, and the first through hole is used for
The composition material of first adhesive portion is imported, first adhesive portion is formed；
The buckled zone is arranged in close to the side of second fixed area in second through-hole, and second through-hole is used for
The composition material of second adhesive portion is imported, second adhesive portion is formed.
In one embodiment, the buckled zone is equipped with groove, and the groove is for alleviating the stress that the buckled zone is subject to.
The embodiment of the invention also provides a kind of display screens comprising: display panel, buffer layer, driving chip, viscous glutinous portion
And flexible circuit board, the flexible circuit board include the first binding area, the second binding area, and setting in first binding
Bent area between area and second binding area, the viscous glutinous portion include the first viscous glutinous portion and the second viscous glutinous portion；
The driving chip setting is in second binding area；
On said display panel, the bent area is bent to form bending space, and makes institute for first binding area's setting
It states driving chip and is fixed on side of the buffer layer far from the display panel；
Described first viscous glutinous portion and the second viscous glutinous portion are arranged in the bending space, described first viscous glutinous portion's setting
In the bent area close to the side in first binding area, described second viscous glutinous portion's setting is in the bent area close to described the
The side in two binding areas.
In one embodiment, the angle between the described first viscous glutinous portion and the bent area is greater than 60 degree, and described second is viscous
Angle between glutinous portion and the bent area is greater than 60 degree.
In one embodiment, the bent area is equipped with perforation, described to perforate for importing the viscous composition material for sticking portion,
Form the viscous glutinous portion.
In one embodiment, the perforation includes the first perforation and the second perforation；
The bent area is arranged in close to the side of first fixed area in first perforation, and first perforation is used for
The composition material for importing the described first viscous glutinous portion forms the described first viscous glutinous portion；
The bent area is arranged in close to the side of second fixed area in second perforation, and second perforation is used for
The composition material for importing the described second viscous glutinous portion forms the described second viscous glutinous portion.
In one embodiment, the bent area is equipped with recess portion, and the recess portion is for alleviating the stress that the bent area is subject to.
The display screen of the embodiment of the present invention can prevent the bending part of display screen by the viscous glutinous portion of setting or adhesive portion
Both ends are peeled off, and the yield of display screen is improved.
For above content of the invention can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings, makees
Detailed description are as follows:
Detailed description of the invention
Fig. 1 is the first structural schematic diagram of display screen provided in an embodiment of the present invention.
Fig. 2 is second of structural schematic diagram of display screen provided in an embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the buckled zone of display screen provided in an embodiment of the present invention.
Fig. 4 is the adhesive portion of display screen provided in an embodiment of the present invention and the structural schematic diagram of bearing bed.
Fig. 5 is the third structural schematic diagram of display screen provided in an embodiment of the present invention.
Fig. 6 is the 4th kind of structural schematic diagram of display screen provided in an embodiment of the present invention.
Fig. 7 is the structural schematic diagram of the bent area of display screen provided in an embodiment of the present invention.
Specific embodiment
The explanation of following embodiment is to can be used to the particular implementation of implementation to illustrate the present invention with reference to additional schema
Example.The direction term that the present invention is previously mentioned, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outside", " side "
Deng being only the direction with reference to annexed drawings.Therefore, the direction term used be to illustrate and understand the present invention, rather than to
The limitation present invention.
The similar unit of structure is to be given the same reference numerals in the figure.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Fig. 1 is please referred to, Fig. 1 is the structural schematic diagram of display screen provided in an embodiment of the present invention.Display screen 1 includes bearing bed
11, display panel 12 and adhesive portion 13.
Bearing bed 11 includes the first backboard 111, the second backboard 112, colloid layer 113 and relief layer 114.Wherein, colloid
Layer 113 is arranged between the second backboard 112 and relief layer 114, which is used to relief layer 114 being fixed on the second back
On plate 112.Relief layer 114 is used for when display screen 1 is by stress, alleviates stress.First backboard 111 is arranged in relief layer 114
On, first backboard 111 is for carrying display panel 12.
Display panel 12 includes the first fixed area 121, the second fixed area 122, and setting in the first fixed area 121 and the
Buckled zone 123 between two fixed areas 122.First fixed area 121 and the second fixed area 122 are separately positioned on the two of bearing bed 11
Display panel 12 and bearing bed 11 is fixedly installed in side.Buckled zone 123 is formed by bending curved space A.In one embodiment, such as
Shown in Fig. 1, the first fixed area 121 is fixed on the first backboard 111, and the second fixed area 122 is fixed on the second backboard 112.
Adhesive portion 13 includes the first adhesive portion 131 and the second adhesive portion 132.First adhesive portion 131 and the second adhesive portion 132
It is arranged in curved space A.Buckled zone 123 is arranged in close to the side of the first fixed area 121 in first adhesive portion 131, and second
Buckled zone 123 is arranged in close to the side of the second fixed area 122 in adhesive portion 132.
As shown in Figure 1, the boundary position a of the first fixed area 121 and buckled zone 123, is easy to shell from the first backboard 111
From.And boundary position a can be fixed on the first backboard 111 by the first adhesive portion 131.Similarly, the second fixed area 122 and curved
The boundary position b in bent area 123 is easy to remove from the second backboard 112.And the second adhesive portion 132 can fix boundary position b
On the second backboard 112.
In one embodiment, the angle theta between the first adhesive portion 131 and buckled zone 123 is greater than 60 degree, the second adhesive portion
Angle β between 132 and buckled zone 123 is greater than 60 degree.The first adhesive portion 131 and the second adhesive portion 132 can be prevented right in this way
Buckled zone 123 generates sharp stab.
The composition material of above-mentioned adhesive portion 13 includes no shadow (Ultraviolet Rays, UV) glue, silica gel, rubber or liquid
One of optical cement is a variety of.It, in one embodiment, can be preparatory in order to form above-mentioned adhesive portion 13 in curved space A
In 123 coating UV glue of buckled zone, silica gel and rubber isocolloid material, after bending buckled zone 123, keep above-mentioned colloidal materials solidifying
Gu forming above-mentioned adhesive portion 13.
In one embodiment, through-hole 14 can also be set in buckled zone 123.Through-hole 14 is used to import the composition of adhesive portion 13
Material forms adhesive portion 13.
The through-hole 14 can be set in buckled zone 123 by the maximum position of stress, to alleviate stress.The through-hole 14 can be with
Setting is at 123 middle part of buckled zone, to facilitate to 123 two sides dispensing of buckled zone.It is stretched specifically, Jiao Zui pipe can be used from through-hole 14
Enter, first along buckled zone 123 close to a side point UV glue of the first fixed area 121, then along buckled zone 123 close to the second fixed area 122
A side point UV glue.Then by the through-hole 14, it is viscous to be formed above-mentioned first so that UV gelling is solid on UV glue surface for UV light emission
Socket part 131 and the second adhesive portion 132.
In one embodiment, as shown in Fig. 2, through-hole 14 may include first through hole 141 and the second through-hole 142.First is logical
Buckled zone 123 is arranged in close to the side of the first fixed area 121 in hole 141, and first through hole 141 is for importing the first adhesive portion 131
Composition material, formed the first adhesive portion 131.Buckled zone 123 is arranged in close to the one of the second fixed area 122 in second through-hole 142
Side, the second through-hole 142 are used to import the composition material of the second adhesive portion 132, form the second adhesive portion 132.Pass through setting first
Through-hole 141, the second through-hole 142 facilitate the thickness, the shape that control the first adhesive portion 131 and the second adhesive portion 132, Yi Jiyu
The angle of buckled zone 123.
As shown in Figure 1, adhesive portion 13 can be segmentation structure, i.e. the first adhesive portion 131 and the second adhesive portion 132 can be with
Do not connect.As shown in Fig. 2, adhesive portion 13 can also be continuity structure, i.e. the first adhesive portion 131 and the second adhesive portion 132 can
To connect.Further, the first adhesive portion 131 and the second adhesive portion 132 can also fill up entire curved space A, make adhesive portion
13 better support bends areas 123.
In one embodiment, in order to further ensure that boundary position a and boundary position b are fixed by colloid, as shown in figure 4,
Connect with bearing bed 11 area of side 133 of adhesive portion 13 can be made to connect with bearing bed 11 with adhesive portion 13 face of side 115
Long-pending ratio is greater than 50 percent.The height h of adhesive portion 13 can also be made to be equal to the height H of bearing bed 11.
The thickness of adhesive portion 13 in the vertical direction can be equal to the height of buckled zone 123, to ensure boundary position a and friendship
Boundary position b is fixed by colloid.In one embodiment, the ratio of the volume of the volume and curved space A of entire adhesive portion 13 may be used also
To be set greater than 50 percent, to further ensure that boundary position a and boundary position b are fixed by colloid.
In one embodiment, as shown in figure 3, being additionally provided with groove 15 on buckled zone 123.Specifically, can be in buckled zone 123
Groove 15 is arranged in edge, to alleviate the stress that buckled zone 123 is subject to.
As shown in the figures 1 and 2, display screen 1 further includes driving chip 16 and flexible circuit board 17.The driving chip 16 setting exists
On second fixed area 122, which has been fixed on the lower section of display screen 1, has reduced with the bending of buckled zone 123
Frame.Side of the relief layer 114 far from the first backboard 111 is arranged in 17 one end of flexible circuit board, and other end setting is solid second
Determine side of the area 122 far from relief layer 114.
The display screen of the embodiment of the present invention by the way that the first adhesive portion and the second adhesive portion are arranged in the curved space, and makes
Buckled zone is arranged in close to the side of the first fixed area in first adhesive portion, and the setting of the second adhesive portion is fixed close to second in buckled zone
The side in area, it is therefore prevented that buckled zone two sides are peeled off, and the yield of display screen is improved.
The embodiment of the invention also provides another display screens.Referring to figure 5., Fig. 5 is provided in an embodiment of the present invention aobvious
The structural schematic diagram of display screen.Display screen 2 includes display panel 21, buffer layer 22, driving chip 23, viscous glutinous portion 24 and flexible wires
Road plate 25.Driving chip 23 is arranged in flexible circuit board 25.Resistance, adjuster and comparator are integrated on driving chip 23
Equal components are responsible for driving display screen 2.
Flexible circuit board 25 is using printed circuit made of insulating substrate flexible.Flexible circuit board 25 is tied up including first
Determine area 251, second and bind area 252, and the bent area 253 being arranged between the first binding area 251 and the second binding area 252.
Second binding area 252 is for being arranged above-mentioned driving chip 23.First binding area 251 is arranged on display panel 21, bent area 253
It is bent to form bending space B, and driving chip 23 is made to be fixed on side of the buffer layer 22 far from display panel 2.It needs to illustrate
It is that support portion 28 is also provided in flexible circuit board 25, which is arranged in 23 two sides of driving chip, for showing
When screen 2 is by stress, the driving chip 23 is protected.
Viscous glutinous portion 24 includes the first viscous glutinous portion 241 and the second viscous glutinous portion 242.First viscous glutinous portion 241 and the second viscous glutinous portion 242
Setting is in bending space B.Bent area 253 is arranged in close to the side in the first binding area 251 in first viscous glutinous portion 241, and second is viscous
Bent area 253 is arranged in close to the side in the second binding area 252 in glutinous portion.
As shown in figure 5, the boundary position c in the first binding area 251 and bent area 253, is easy to remove from display panel 2.
And boundary position c can be fixed on display panel 2 by the first viscous glutinous portion 241.Similarly, the second binding area 252 and bent area
253 boundary position d is easy to remove from buffer layer 22.And boundary position d can be fixed on buffering by the second viscous glutinous portion 242
On layer 22.
In one embodiment, the angle Φ between the first viscous glutinous portion 241 and bent area 253 is greater than 60 degree, the second viscous glutinous portion
Angle Ψ between 242 and bent area 253 is greater than 60 degree.The first viscous glutinous portion 241 and the second viscous glutinous portion 242 can be prevented right in this way
Bent area 253 generates sharp stab.
The composition material in above-mentioned viscous glutinous portion 24 includes one of shadowless glue, silica gel, rubber or liquid optical cement or a variety of.
It in one embodiment can be in advance in 253 coating UV glue of bent area, silicon in order to form above-mentioned viscous glutinous portion 24 in curved space B
Glue and rubber isocolloid material solidify above-mentioned colloidal materials after bending bent area 253, form above-mentioned viscous glutinous portion 24.
In one embodiment, perforation 26 can also be set in bent area 253, perforation 26 is for importing the composition in viscous glutinous portion 24
Material forms viscous glutinous portion.
The perforation 26 can be set in bent area 253 by the maximum position of stress, to alleviate stress.The perforation 26 can be with
Setting is at 253 middle part of bent area, to facilitate to 253 two sides dispensing of bent area.It is stretched specifically, Jiao Zui pipe can be used from perforation 26
Enter, first along bent area 253 close to a side point UV glue in the first binding area 251, then along bent area 253 close to the second binding area 252
A side point UV glue.Then by the perforation 26, it is viscous to be formed above-mentioned first so that UV gelling is solid on UV glue surface for UV light emission
Glutinous portion 241 and the second viscous glutinous portion 242.
In one embodiment, as shown in fig. 6, perforation 26 includes the first perforation 261 and the second perforation 262.First perforation 261
Bent area 253 is set close to the side in the first binding area 251, the first perforation 261 is for importing the composition in the first viscous glutinous portion 241
Material forms the first viscous glutinous portion 241.Second perforation 262 be arranged in bent area 253 close to second binding area 252 side, second
Perforation 262 forms the second viscous glutinous portion 242 for importing the composition material in the second viscous glutinous portion 242.By setting first perforation 261,
Second perforation 262, facilitates thickness, the shape in first viscous glutinous portion 241 and the second viscous glutinous portion 242 of control, and with bent area 253
Angle.
As shown in fig. 6, viscous glutinous portion 24 can be segmentation structure, i.e., the first viscous glutinous portion 241 and the second viscous glutinous portion 242 can be with
Do not connect.As shown in figure 5, viscous glutinous portion 24 can also be continuity structure, i.e., the first viscous glutinous portion 241 and the second viscous glutinous portion 242 can
To connect.
In one embodiment, the height that the glutinous thickness of portion 24 in the vertical direction can be equal to bent area 253 is glued, to ensure
Boundary position c and boundary position d are fixed by colloid.In one embodiment, the body of the volume in entire viscous glutinous portion 24 and curved space B
Long-pending ratio may be arranged as being greater than 50 percent, to further ensure that boundary position c and boundary position d are consolidated by colloid
It is fixed.
In one embodiment, as shown in fig. 7, being additionally provided with recess portion 27 on bent area 253.Specifically, can be in bent area 253
Recess portion 27 is arranged in edge, to alleviate the stress that bent area 253 is subject to.
The display screen of the embodiment of the present invention, by being arranged in the first viscous glutinous portion and the second viscous glutinous portion in bending space, and
Make the first viscous glutinous portion that bent area is set close to the side in the first binding area, the second viscous glutinous portion is set in bent area close to second
Bind the side in area, it is therefore prevented that bent area two sides are peeled off, and the yield of display screen is improved.
In conclusion although the present invention has been disclosed above in the preferred embodiment, but above preferred embodiment is not to limit
The system present invention, those skilled in the art can make various changes and profit without departing from the spirit and scope of the present invention
Decorations, therefore protection scope of the present invention subjects to the scope of the claims.
Claims (10)
1. a kind of display screen characterized by comprising bearing bed, display panel and adhesive portion, the display panel include the
One fixed area, the second fixed area, and the buckled zone being arranged between first fixed area and second fixed area, it is described
Adhesive portion includes the first adhesive portion and the second adhesive portion；
First fixed area and second fixed area are separately positioned on the two sides of the bearing bed, make the display panel with
The bearing bed fixed setting；
The buckled zone is formed by bending the curved space；
First adhesive portion and second adhesive portion are arranged in the curved space, and first adhesive portion is arranged in institute
Buckled zone is stated close to the side of first fixed area, the second adhesive portion setting is solid close to described second in the buckled zone
Determine the side in area.
2. display screen according to claim 1, which is characterized in that the adhesive portion connects the face of side with the bearing bed
The ratio of the area of the long-pending side that connects with the bearing bed with the adhesive portion is greater than 50 percent.
3. display screen according to claim 1, which is characterized in that the buckled zone is equipped with through-hole, and the through-hole is for leading
The composition material for entering the adhesive portion forms the adhesive portion.
4. display screen according to claim 3, which is characterized in that the through-hole includes first through hole and the second through-hole；
The buckled zone is arranged in close to the side of first fixed area in the first through hole, and the first through hole is for importing
The composition material of first adhesive portion forms first adhesive portion；
The buckled zone is arranged in close to the side of second fixed area in second through-hole, and second through-hole is for importing
The composition material of second adhesive portion forms second adhesive portion.
5. display screen according to claim 1, which is characterized in that the buckled zone is equipped with groove, and the groove is for delaying
Solve the stress that the buckled zone is subject to.
6. a kind of display screen characterized by comprising display panel, buffer layer, driving chip, viscous glutinous portion and flexible circuitry
Plate, the flexible circuit board include the first binding area, the second binding area, and setting in first binding area and described second
The bent area between area is bound, the viscous glutinous portion includes the first viscous glutinous portion and the second viscous glutinous portion；
The driving chip setting is in second binding area；
On said display panel, the bent area is bent to form bending space, and makes the drive for first binding area's setting
Dynamic chip is fixed on side of the buffer layer far from the display panel；
Described first viscous glutinous portion and the second viscous glutinous portion are arranged in the bending space, and the described first viscous glutinous portion is arranged in institute
Bent area is stated close to the side in first binding area, described second viscous glutinous portion's setting is tied up in the bent area close to described second
Determine the side in area.
7. display screen according to claim 6, which is characterized in that the folder between the described first viscous glutinous portion and the bent area
Angle is greater than 60 degree, and the angle between the described second viscous glutinous portion and the bent area is greater than 60 degree.
8. display screen according to claim 6, which is characterized in that the bent area is equipped with perforation, and the perforation is for leading
The composition material for entering the viscous glutinous portion forms the viscous glutinous portion.
9. display screen according to claim 8, which is characterized in that the perforation includes the first perforation and the second perforation；
The bent area is arranged in close to the side of first fixed area in first perforation, and first perforation is for importing
The composition material in the described first viscous glutinous portion forms the described first viscous glutinous portion；
The bent area is arranged in close to the side of second fixed area in second perforation, and second perforation is for importing
The composition material in the described second viscous glutinous portion forms the described second viscous glutinous portion.
10. display screen according to claim 6, which is characterized in that the bent area is equipped with recess portion, and the recess portion is for delaying
Solve the stress that the bent area is subject to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199207.9A CN109859632A (en) | 2019-03-15 | 2019-03-15 | Display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910199207.9A CN109859632A (en) | 2019-03-15 | 2019-03-15 | Display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109859632A true CN109859632A (en) | 2019-06-07 |
Family
ID=66901062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910199207.9A Pending CN109859632A (en) | 2019-03-15 | 2019-03-15 | Display screen |
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| Country | Link |
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| CN (1) | CN109859632A (en) |
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| CN110570753A (en) * | 2019-09-17 | 2019-12-13 | 京东方科技集团股份有限公司 | Display device and assembling method thereof |
| CN110751909A (en) * | 2019-10-31 | 2020-02-04 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN111599272A (en) * | 2020-05-18 | 2020-08-28 | 京东方科技集团股份有限公司 | Display assembly, manufacturing method thereof and display device |
| WO2020248450A1 (en) * | 2019-06-14 | 2020-12-17 | 武汉华星光电半导体显示技术有限公司 | Foldable display panel, display module and manufacturing method |
| WO2020258295A1 (en) * | 2019-06-28 | 2020-12-30 | 京东方科技集团股份有限公司 | Flexible circuit board, flexible device, and display apparatus |
| WO2021003849A1 (en) * | 2019-07-05 | 2021-01-14 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method therefor |
| WO2021016912A1 (en) * | 2019-07-31 | 2021-02-04 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN112820208A (en) * | 2019-11-18 | 2021-05-18 | 三星显示有限公司 | Display device |
| WO2021253497A1 (en) * | 2020-06-17 | 2021-12-23 | 武汉华星光电技术有限公司 | Display module and electronic device |
| CN113923278A (en) * | 2020-07-08 | 2022-01-11 | 深圳市柔宇科技股份有限公司 | Bendable device |
| CN114077079A (en) * | 2020-08-19 | 2022-02-22 | 苹果公司 | Display panel bend stiffener |
| WO2022042038A1 (en) * | 2020-08-28 | 2022-03-03 | 京东方科技集团股份有限公司 | Display device, bent gasket module and assembling method therefor |
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