CN108665804A - Folding electronic paper display devices and its manufacturing method - Google Patents
Folding electronic paper display devices and its manufacturing method Download PDFInfo
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- CN108665804A CN108665804A CN201710206669.XA CN201710206669A CN108665804A CN 108665804 A CN108665804 A CN 108665804A CN 201710206669 A CN201710206669 A CN 201710206669A CN 108665804 A CN108665804 A CN 108665804A
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- electronic paper
- paper display
- groove
- display devices
- bent area
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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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- 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
- G09F9/37—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 being movable elements
- G09F9/372—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 being movable elements the positions of the elements being controlled by the application of an electric field
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The invention discloses a kind of folding electronic paper display devices and its manufacturing method, folding electronic paper display devices include electronic paper display panel and rear screening glass.Electronic paper display panel has bent area and abuts two plane areas of bent area two edges respectively.When electronic paper display panel folds, two plane areas are substantially parallel.Screening glass is located at the back side of electronic paper display panel afterwards, and in plane area and bent area.Screening glass has at least one groove afterwards, and groove is at least partially disposed in bent area, and the width of groove is less than the width of bent area.Since rear screening glass has the groove being located in bent area, interlayer internal stress can be reduced in the bent area that strain differs greatly, rear screening glass is avoided to be detached from from the back side of electronic paper display panel.
Description
Technical field
The present invention relates to a kind of folding electronic paper display devices and a kind of manufactures of folding electronic paper display devices
Method.
Background technology
Due to the appearance of flexible panel (such as electronic paper display panel), folding display equipment is allowed to have occurred in current
In electronics market.In general, in order to protect the front and the back side of flexible panel, can be covered each by using two panels screening glass
In the front and the back side of flexible panel.
However, after flexible panel is bent along center line, opposite sides of this two panels screening glass because being located at flexible panel, because
This has maximum deformation quantity and generates interlayer internal stress.Thus, the region big in strain difference, display equipment may
There is a phenomenon where delaminations, such as screening glass to be detached from from the surface of flexible panel between the layers.In addition, if flexible panel is electricity
When sub- paper panel, in dynamic fatigue test, it is bent the phenomenon that periphery in region has stress concentration, makes that there is the aobvious of microcapsules
Show that dielectric layer ruptures.
Invention content
The purpose of the present invention be provide it is a kind of can reduce interlayer internal stress in the bent area that differs greatly of strain, after avoiding
The folding electronic paper display devices that screening glass is detached from from the back side of electronic paper display panel.
According to an embodiment of the present invention, a kind of folding electronic paper display devices include that electronic paper display panel is protected with rear
Bluff piece.Electronic paper display panel has bent area and abuts two plane areas of bent area two edges respectively.When Electronic Paper is shown
When panel folds, two plane areas are substantially parallel.Screening glass is located at the back side of electronic paper display panel afterwards, and positioned at plane area with
In bent area.Screening glass has at least one groove afterwards, and groove is at least partially disposed in bent area, and the width of groove is less than curved
The width of folding area.
In an embodiment of the present invention, the width of above-mentioned groove is W, and the radius of curvature of bent area is R centimetres (mm), and
1 centimetre<W<π R centimetre (π:Pi).
In an embodiment of the present invention, above-mentioned groove is located at the center of bent area.
In an embodiment of the present invention, a part for above-mentioned groove is located in plane area, and one of plane area
It is exposed by groove with the intersection of bent area.
In an embodiment of the present invention, there are two groove, a part for each groove is located at puts down above-mentioned rear screening glass tool
In the area of face, and plane area and the intersection of bent area are exposed by groove respectively.
In an embodiment of the present invention, there are two groove, the first section, the second section and thirds for above-mentioned rear screening glass tool
Section.First section and the second section are located in plane area.Third section is located in bent area.Groove is located at first
Between section and third section and between the second section and third section.
In an embodiment of the present invention, the third section of above-mentioned rear screening glass has more multiple grooves.
In an embodiment of the present invention, above-mentioned rear screening glass has first part, second part and Part III.First
Part is located at second part in plane area.Part III is located at bent area and extends in plane area.Part III
Material is different from the material of first part, and the material of first part is identical as the material of second part.
In an embodiment of the present invention, above-mentioned groove is located in the Part III of rear screening glass.
In an embodiment of the present invention, the hardness of above-mentioned first part and second part is more than the hardness of Part III.
In an embodiment of the present invention, the ductility of above-mentioned Part III is more than the extension of first part and second part
Property.
In an embodiment of the present invention, the material of above-mentioned Part III is silica gel, the material of first part and second part
Matter is polyethylene terephthalate.
In an embodiment of the present invention, the plan view shape of above-mentioned groove is linear, string waveform, square waveform or triangular wave
Shape.
In an embodiment of the present invention, above-mentioned folding electronic paper display devices also include preceding screening glass.Preceding screening glass
Positioned at electronic paper display panel back on the front at the back side.
Another object of the present invention is to provide a kind of manufacturing method of folding electronic paper display devices.
According to an embodiment of the present invention, a kind of manufacturing method of folding electronic paper display devices includes：It is protected by after
Piece is attached at the back side of electronic paper display panel, and wherein electronic paper display panel has bent area and abuts bent area both sides respectively
Two plane areas of edge.Screening glass after cutting and form at least one groove, wherein groove is at least partially disposed in bent area.
In the above embodiment of the present invention, although electronic paper display panel will produce two plane areas and bending when folding
Area, but because rear screening glass has the groove being at least partially disposed in bent area, therefore can be dropped in the bent area that strain differs greatly
Internal stress between low layer avoids rear screening glass from being detached from from the back side of electronic paper display panel.In addition, can also improve bending area edge
Stress concentration phenomenon avoids electronic paper display panel from damaging, and prolongs the service life.
Description of the drawings
Fig. 1 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
The folding electronic paper display devices that Fig. 2 is painted Fig. 1 are in the sectional view of folded state.
Fig. 3 A to Fig. 3 D are painted the vertical view of the groove according to the multiple embodiments of the present invention.
Fig. 4 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
Fig. 5 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
The folding electronic paper display devices that Fig. 6 is painted Fig. 5 are in the sectional view of folded state.
Fig. 7 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
The folding electronic paper display devices that Fig. 8 is painted Fig. 7 are in the sectional view of folded state.
Fig. 9 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
The folding electronic paper display devices that Figure 10 is painted Fig. 9 are in the sectional view of folded state.
Figure 11 is painted the sectional view that folding electronic paper display devices according to an embodiment of the present invention are in unfolded state.
The folding electronic paper display devices that Figure 12 is painted Figure 11 are in the sectional view of folded state.
Specific implementation mode
Multiple embodiments of the cooperation description of the drawings present invention below, to simplify attached drawing, some known usual structures with
Component will be painted in a manner of simply illustrating.
Fig. 1 is painted the section that folding electronic paper display devices 100 according to an embodiment of the present invention are in unfolded state
Figure.The folding electronic paper display devices 100 that Fig. 2 is painted Fig. 1 are in the sectional view of folded state.It, can simultaneously refering to fig. 1 with Fig. 2
Folding electronic paper display devices 100 include electronic paper display panel 110 and rear screening glass 120.Electronic paper display panel 110 has
Bent area A1 and two plane areas A2, A3 for abutting the bent area two edges A1 respectively.When electronic paper display panel 110 folds,
Bent area A1 is substantially u-shaped, and two plane area A2 and A3 are substantially parallel.Electronic paper display panel 110 has the opposite back side
112 and positive 114, wherein front 114 is display surface.Screening glass 120 is located at the back side 112 of electronic paper display panel 110 afterwards, and
Screening glass 120 is located in bent area A1 and plane area A2, A3 afterwards.In addition, rear screening glass 120 has at least one groove 122, and
Groove 122 is at least partially disposed in the A1 of bent area, and the width W1 of groove 122 is less than the width of bent area A1.In present embodiment
In, the groove 122 of rear screening glass 120 is hollow out, that is, the thickness for being of a depth approximately equal to rear screening glass 120 of groove 122,
But it is not intended to limit the invention.
In addition, folding electronic paper display devices 100 also may include preceding screening glass 130.Preceding screening glass 130 is located at Electronic Paper
On the front 114 of display panel 110, it can be used for protecting electronic paper display panel 110.
In the present embodiment, when electronic paper display panel 110 folds, the radius of curvature of bent area A1 is R centimetres
(mm), the width W1 of the groove 122 of rear screening glass 120 is less than π R centimetre, and width W1 is more than 1 centimetre (mm), that is, 1 centimetre
<W1<π R centimetre.Entire groove 122 can be located in the A1 of bent area, such as positioned at the center of bent area A1 so that Electronic Paper is shown
Partial rear 112 of the panel 110 in bent area A1 can be exposed by the groove 122 of rear screening glass 120.
After folding electronic paper display devices 100 are bent, although electronic paper display panel 110 can be folded and generate flat
Face area A2, A3 and bent area A1, but since rear screening glass 120 has the groove 122 being at least partially disposed in the A1 of bent area,
Interlayer internal stress can be reduced in the bent area A1 that strain differs greatly, so that interlayer internal stress is redistributed, avoids rear screening glass 120
It is detached from from the back side of electronic paper display panel 110 112.Further, since the groove 122 of rear screening glass 120 can improve bent area A1
The stress concentration phenomenon at edge can avoid electronic paper display panel when expansion is with folding electronic paper display devices 100 are folded
110 damages, prolong the service life.For example, the microcapsules of display dielectric layer be can avoid in bent area A1 and plane area A2, A3
Intersection rupture.
In addition, when electronic paper display panel 110 is in unfolded state and by use, the width W1 due to groove 122 is less than
The width of bent area A1 avoids bent area A1 from generating recessed because hereafter screening glass 120 can maintain enough support forces in bent area A1
It falls into.When electronic paper display panel 110 has touch function, the pressing feel for user in bent area A1 is helpful, can
Sensitivity when promotion touch-control and uniformity, when user being allowed to be unlikely to when pressing bent area A1 with pressing plane area A2, A3
Feel difference.Furthermore when user watches above the front 114 of electronic paper display panel 110, because of groove 122
Width W1 is small, can avoid display picture and generates color lump, aberration or boundary line in bent area A1 and plane area A2, A3, promotes visual impression
By.
In addition, when manufacturing folding electronic paper display devices 100, rear screening glass 120 can be attached at Electronic Paper and shown
The back side 112 of panel 110, then cut after screening glass 120 and form groove 122 so that groove 122 is at least partially disposed at bending
In area A1.It for example, can be with screening glass 120 after cutter or laser cutting to form groove 122, not limiting this hair
It is bright.It is aobvious to be attached to single Electronic Paper for multi-disc screening glass 120 after the manufacturing method of this folding electronic paper display devices 100 can save
Show the time of panel 110, built-up time and manpower can be saved.
Fig. 3 A to Fig. 3 D are painted the vertical view of the groove according to the multiple embodiments of the present invention.Screening glass 120 can have afterwards
Various forms of grooves.For example, its plan view shape of the groove 122 of screening glass 120 is linear after Fig. 1, as in Fig. 3 A institutes
Show.However, the groove shape of rear screening glass 120 is not limited with linear.In figure 3b, the groove 122a of rear screening glass 120
Plan view shape be string waveform.In fig. 3 c, the plan view shape of the groove 122b of rear screening glass 120 is square waveform.In fig. 3d,
The plan view shape of the groove 122c of screening glass 120 is triangular waveform afterwards.
It will be understood that the component connection relation described will not be repeated again with effect and repeat, conjunction is first chatted bright.It is chatted following
In stating, it will illustrate the rear screening glass of folding electronic paper display devices other forms.
Fig. 4 is painted the section that folding electronic paper display devices 100a according to an embodiment of the present invention is in unfolded state
Figure.As shown, folding electronic paper display devices 100a includes electronic paper display panel 110 and rear screening glass 120a.With Fig. 1
The different place of embodiment is：The width W2 of the groove 122d of screening glass 120a is more than electronic paper display panel 110 afterwards
The width of bent area A1 so that entire bent area A1, part planar area A2 and part planar area A3 are exposed by groove 122d.Work as electricity
When sub- paper display panel 110 folds, the radius of curvature of bent area A1 is R, and the width W2 of the groove 122d of rear screening glass 120a is small
In the width and (being illustrated with A1+A2+A3 with lower inequality) of bent area A1, plane area A2 and plane area A3, and width W2 is more than π
R, that is, π R<W2<A1+A2+A3.
Fig. 5 is painted the section that folding electronic paper display devices 100b according to an embodiment of the present invention is in unfolded state
Figure.The folding electronic paper display devices 100b that Fig. 6 is painted Fig. 5 is in the sectional view of folded state.It, can simultaneously refering to Fig. 5 and Fig. 6
Folding electronic paper display devices 100b includes electronic paper display panel 110 and rear screening glass 120b.Not with Fig. 1, Fig. 2 embodiment
Same place is：There are two groove 122e, 122f for screening glass 120b tools afterwards.In addition, a part of groove 122e is located at plane
In area A2, a part is located in the A1 of bent area.A part of groove 122f is located in plane area A3, and a part is located at bent area A1
In.Therefore, the intersection of plane area A2 and bent area A1 is exposed by groove 122e, and the intersection of plane area A3 and bent area A1
It is exposed by groove 122f.
In other words, rear screening glass 120b has the first section 124, the second section 126 and third section 128.Firstth area
Section 124 and the second section 126 are located in plane area A2, A3.Third section 128 is located in the A1 of bent area.Groove 122e
Between the first section 124 and third section 128, and groove 122f is between the second section 126 and third section 128.
In other embodiments, rear screening glass 120b can have one of groove 122e, 122f, not limiting
The system present invention.
Fig. 7 is painted the section that folding electronic paper display devices 100c according to an embodiment of the present invention is in unfolded state
Figure.The folding electronic paper display devices 100c that Fig. 8 is painted Fig. 7 is in the sectional view of folded state.It, can simultaneously refering to Fig. 7 and Fig. 8
Folding electronic paper display devices 100c includes electronic paper display panel 110 and rear screening glass 120c.Not with Fig. 5, Fig. 6 embodiment
Same place is：The third section 128a of screening glass 120c also has multiple groove 122g afterwards.These third sections 128a's
Groove 122g contributes to the bending of rear screening glass 120c and electronic paper display panel 110, make electronic paper display panel 110 be not easy because
Stress concentration and damage, and the third section 128a of rear screening glass 120c can also possess the supportive enough to bent area A1.
Fig. 9 is painted the section that folding electronic paper display devices 100d according to an embodiment of the present invention is in unfolded state
Figure.The folding electronic paper display devices 100d that Figure 10 is painted Fig. 9 is in the sectional view of folded state.Simultaneously refering to Fig. 9 and Figure 10,
Folding electronic paper display devices 100d includes electronic paper display panel 110 and rear screening glass 120d.With Fig. 1, Fig. 2 embodiment
Different places are：First part 125, second part 127 and the third portion that screening glass 120d has material not all the same afterwards
Divide 129.First part 125 is located at second part 127 in plane area A2, A3.Part III 129 be located at bent area A1 and
It extends in plane area A2, A3.Groove 122h, 122i of screening glass 120d is respectively positioned on the Part III of rear screening glass 120d afterwards
In 129.
In the present embodiment, the material of the material of the Part III 129 of rear screening glass 120d and first part 125 is not
Together, the material of Part III 129 is also different from the material of second part 127, and the material and second part of first part 125
127 material is identical.For example, the hardness of the first part 125 of rear screening glass 120d and second part 127 is more than the
The hardness of three parts 129, the ductility of Part III 129 are more than the ductility of first part 125 and second part 127 so that
Plane area A2, A3 of electronic paper display panel 110 can be supported by harder first part 125 with second part 127 respectively, and curved
Folding area A1 can be supported by softer Part III 129.
Thus, which 129 material of Part III of screening glass 120d is protected after being each contributed to groove 122h, 122i in it
The bending of bluff piece 120d and electronic paper display panel 110 make electronic paper display panel 110 be not easy stress and concentrate and damage, and
The Part III 129 of screening glass 120d can also possess the supportive enough to bent area A1 afterwards.
In the present embodiment, the material of the Part III 129 of rear screening glass 120d can be silica gel, and first part
125 and the material of second part 127 can be polyethylene terephthalate (Polyethylene terephthalate；
PET), but it is not intended to limit the invention.
It will be understood that the form of Fig. 3 A to Fig. 3 D grooves all can be selected in the groove of each embodiment of the present invention, according to designer
Depending on demand.
Figure 11 is painted the cuing open in unfolded state of folding electronic paper display devices 100e according to an embodiment of the present invention
Face figure.The folding electronic paper display devices 100e that Figure 12 is painted Figure 11 is in the sectional view of folded state.With Fig. 1, Fig. 2 embodiment party
The different place of formula is：The groove 122j of screening glass 120e is not hollow out afterwards, that is, the depth of groove 122j is less than
The thickness of screening glass 120e afterwards.Such design, in the A1 of bent area, 112 respective grooves of the back side of electronic paper display panel 110
The position of 122j can be covered by the rear screening glass 120 of thinner part, without exposed from groove 122j.Each embodiment of the present invention
Groove all can be selected Figure 11, Figure 12 groove 122j form, depending on designer's demand.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any fields
Technical staff, without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore the protection of the present invention
Subject to range ought be defined depending on claim.
Claims (15)
1. a kind of folding electronic paper display devices, which is characterized in that include：
Electronic paper display panel, with bent area and two plane areas for abutting the bent area two edges respectively, when the electricity
When sub- paper display panel folds, described two plane areas are substantially parallel；And
Screening glass afterwards is located at the back side of the electronic paper display panel, and in described two plane areas and the bent area,
Screening glass has at least one groove after described, and the groove is at least partially disposed in the bent area, the width of the groove
Width of the degree less than the bent area.
2. folding electronic paper display devices as described in claim 1, which is characterized in that the width of the groove is W, described
The radius of curvature of bent area is R, and 1 centimetre<W<π R centimetre.
3. folding electronic paper display devices as described in claim 1, which is characterized in that the groove is located at the bent area
Center.
4. folding electronic paper display devices as described in claim 1, which is characterized in that a part for the groove is located at institute
It states in plane area, and one of described two plane areas and the intersection of the bent area are exposed by the groove.
5. folding electronic paper display devices as described in claim 1, which is characterized in that there are two ditches for screening glass tool after described
A part for slot, each groove is located in the plane area, and the intersection of described two plane areas and the bent area
It is exposed by described two grooves respectively.
6. folding electronic paper display devices as described in claim 1, which is characterized in that there are two ditches for screening glass tool after described
Slot, the first section, the second section and third section, first section are located at described two planes with second section
Qu Zhong, the third section are located in the bent area, and described two grooves are located at first section and described the
Between three sections and between second section and the third section.
7. folding electronic paper display devices as claimed in claim 6, which is characterized in that the third of screening glass after described
Section also has multiple grooves.
8. folding electronic paper display devices as described in claim 1, which is characterized in that screening glass has first after described
Point, second part and Part III, the first part is located at the second part in described two plane areas, described
Part III is located at the bent area and extends in described two plane areas, and the material of the Part III and described first
Partial material is different, and the material of the first part is identical as the material of the second part.
9. folding electronic paper display devices as claimed in claim 8, which is characterized in that the groove is located at the rear protection
In the Part III of piece.
10. folding electronic paper display devices as claimed in claim 8, which is characterized in that the first part and described the
The hardness of two parts is more than the hardness of the Part III.
11. folding electronic paper display devices as claimed in claim 8, which is characterized in that the ductility of the Part III
More than the ductility of the first part and the second part.
12. folding electronic paper display devices as claimed in claim 8, which is characterized in that the material of the Part III is
The material of silica gel, the first part and the second part is polyethylene terephthalate.
13. folding electronic paper display devices as described in claim 1, which is characterized in that the plan view shape of the groove is
Linear, string waveform, square waveform or triangular waveform.
14. folding electronic paper display devices as described in claim 1, which is characterized in that also include：
Preceding screening glass is located at the electronic paper display panel back on the front at the back side.
15. a kind of manufacturing method of folding electronic paper display devices, which is characterized in that include：
Rear screening glass is attached to the back side of electronic paper display panel, wherein the electronic paper display panel has bent area and divides
Not Lin Jie the bent area two edges two plane areas；And
It cuts the rear screening glass and forms at least one groove, wherein the groove is at least partially disposed in the bent area.
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| CN201710206669.XA CN108665804A (en) | 2017-03-31 | 2017-03-31 | Folding electronic paper display devices and its manufacturing method |
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| CN201710206669.XA CN108665804A (en) | 2017-03-31 | 2017-03-31 | Folding electronic paper display devices and its manufacturing method |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110164309A (en) * | 2019-05-24 | 2019-08-23 | 武汉天马微电子有限公司 | Foldable display device |
| CN110277022A (en) * | 2019-02-20 | 2019-09-24 | 华为技术有限公司 | A kind of flexible display screen and the terminal containing the display screen |
| CN111312919A (en) * | 2020-01-19 | 2020-06-19 | Oppo（重庆）智能科技有限公司 | Display screen assembly, electronic device and preparation method of display screen assembly |
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| CN111739426A (en) * | 2019-07-26 | 2020-10-02 | 友达光电股份有限公司 | Flexible display device |
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| WO2021120342A1 (en) * | 2019-12-17 | 2021-06-24 | 武汉华星光电半导体显示技术有限公司 | Flexible display device |
| CN113066382A (en) * | 2021-03-29 | 2021-07-02 | 京东方科技集团股份有限公司 | Display module and display device |
| CN113724596A (en) * | 2021-08-30 | 2021-11-30 | 京东方科技集团股份有限公司 | Display device, display module and folding structure |
| CN113960708A (en) * | 2021-10-26 | 2022-01-21 | 苏州众为光电有限公司 | Cutting method of narrow-band filter |
| CN115311942A (en) * | 2022-07-22 | 2022-11-08 | 昆山国显光电有限公司 | Display module and display device |
| US20220396050A1 (en) * | 2020-09-27 | 2022-12-15 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Backplate and display device |
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