CN111462632A - Display device - Google Patents
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- CN111462632A CN111462632A CN202010398364.5A CN202010398364A CN111462632A CN 111462632 A CN111462632 A CN 111462632A CN 202010398364 A CN202010398364 A CN 202010398364A CN 111462632 A CN111462632 A CN 111462632A
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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 application provides a display device, comprising a flexible display screen which comprises a main display area and a fixed bending area positioned outside the main display area along a first direction; the fixing seat is arranged on one side of the non-light-emitting surface of the flexible display screen and corresponds to the fixed bending area, and the fixing seat is arranged along a second direction perpendicular to the first direction; and each group of elastic structure bodies comprises a plurality of elastic structure bodies with elastic restoring force along the height direction of the elastic structure bodies, one end of each elastic structure body is connected with the fixed seat, and the other end of each elastic structure body is connected with the non-light-emitting surface of the flexible display screen and connected with the fixed bending area so as to enable the fixed bending area to bend towards the non-light-emitting surface of the flexible display screen through the elastic restoring force of the elastic structure bodies to form a curved surface structure. The application discloses display device has realized the edge bending of flexible display screen on the whole thickness's of attenuate basis.
Description
Technical Field
The application relates to the technical field of display, in particular to a display device.
Background
Currently, with the development of flexible display technologies, application forms of a curved screen, a folding screen, a wrist strap, a rolling screen and the like with fixed curvature are diversified, and new vitality is injected into the design of a flexible display screen.
The flexible display screen can make the frame into a fixed curvature form, so that the display frame is visually reduced, and the appearance is attractive. Meanwhile, the bent edge can bring a new application form for APP function development in a display device form, for example, a side key is made into touch display and the like.
The flexible display screen has the great characteristic that the flexible display screen can be dynamically bent, and the final display size can be changed to be about 2 times of the initial folding size.
However, if one wants to integrate edge bending and dynamic bending together, there are certain difficulties in die set material selection.
The dynamic bending display screen requires that the cover plate material of the display panel is a plastic film material, which is relatively soft and cannot provide support for the fixed curvature display of the edge. If a metal material is used to support the back of the display panel, the thickness of the metal material layer is required to be 1.0 mm-2.5 mm, and the metal material layer with such thickness cannot be subjected to dynamic small-radius bending.
One current solution is to pattern the metallic material layer of the dynamic bending zone so that it has a certain bending characteristic, while part of the edge is subjected to a fixed curvature bending. However, this solution has two disadvantages:
1. the patterned metal layer is thicker, and the thickness of the whole module is increased.
2. The edge of the metal material layer is bent, so that the fitting process needs to process the fitting with radian, the process is complex, and the yield of finished products is low.
Therefore, how to realize the edge bending of the flexible display screen based on the reduction of the whole thickness is a problem to be solved in the field.
Disclosure of Invention
The application provides a display device to realize the edge bending of flexible display screen on the basis of the whole thickness of attenuate.
According to an embodiment of the present application, there is provided a display device including a flexible display screen including a main display area and a fixed bending area located outside the main display area along a first direction, the display device further including:
the fixed seat is positioned on one side of the non-light-emitting surface of the flexible display screen, the fixed seat is arranged corresponding to the fixed bending area, and the fixed seat is arranged along a second direction perpendicular to the first direction;
the flexible display screen comprises at least one group of elastic structure bodies, each group of elastic structure bodies comprises a plurality of elastic structure bodies with elastic restoring force along the height direction of the elastic structure bodies, the elastic structure bodies in the same group are same in length and are arranged at intervals along a second direction perpendicular to the first direction, the elastic structure bodies in different groups are different in length, one end of each elastic structure body is connected with the fixed seat, the other end of each elastic structure body is connected with the non-light-emitting surface of the flexible display screen and is connected with the fixed bending area, and the fixed bending area is bent towards the non-light-emitting surface of the flexible display screen through the elastic restoring force of the elastic structure bodies to form a curved surface structure.
Optionally, one end of the fixed bending area close to the main display area is a starting end, and one end far away from the main display area is a terminal end, wherein,
when the number of the groups of the elastic structure bodies is one, one end of the group of the elastic structure bodies, which is connected with the non-light-emitting surface of the flexible display screen, is positioned at the terminal of the fixed bending area;
when the number of the groups of the elastic structure bodies is two, one end of one group of the elastic structure bodies connected with the non-light-emitting surface of the flexible display screen is positioned at the terminal of the fixed bending area, and the other end of the other group of the elastic structure bodies connected with the non-light-emitting surface of the flexible display screen is positioned at the starting end of the fixed bending area or positioned between the starting end and the terminal of the fixed bending area;
when the number of the groups of the elastic structures is at least three, one end of one group of the elastic structures connected with the non-light-emitting surface of the flexible display screen is located at the terminal of the fixed bending area, the other end of the other group of the elastic structures connected with the non-light-emitting surface of the flexible display screen is located at the starting end of the fixed bending area, the other ends of the other groups of the elastic structures connected with the non-light-emitting surface of the flexible display screen are located between the starting end and the terminal of the fixed bending area, and when the number of the other groups of the elastic structures is at least two, the other groups of the elastic structures are arranged at intervals at the end connected with the non-light-emitting surface of the flexible display screen.
Optionally, the flexible display screen includes a flexible display panel and a supporting plate stacked together, the supporting plate is located between the flexible display panel and the fixing seat, and the elastic structure is connected to the supporting plate.
Optionally, the material of the support plate is an aluminum alloy.
Optionally, the thickness of the supporting plate is 20 um-50 um.
Optionally, the cover plate of the flexible display panel is of a single-layer or double-layer structure, and the material of the cover plate is one of PI, PET, and PEN. Wherein, the English letters of PI are all called as: polyimide, corresponding to chinese: a polyimide; the English name of PET is: polyethylene terephthalate, corresponding Chinese is: polyethylene terephthalate; PEN is short for polyethylene naphthalate.
Optionally, the thickness of the cover plate of the flexible display panel is 40 um-200 um.
Optionally, the plurality of elastic structural bodies in the same group are spaced apart from each other in the second direction by a distance of 2mm to 10 mm.
Optionally, the fixing seat is a fixing shaft, and when the number of the groups of the elastic structural bodies is multiple, the multiple groups of the elastic structural bodies are sequentially connected to the outer periphery of the fixing shaft along the circumferential direction of the fixing shaft.
Optionally, the curvature radius of the curved surface structure is 3 mm-5 mm.
Optionally, a dynamic bending region is further disposed in the main display region, the dynamic bending region can be bent towards the non-light-emitting surface of the flexible display screen, and the radius of curvature is 3mm to 5 mm.
Optionally, the elastic structure is a spring.
The display device of the embodiment is provided with at least one group of elastic structure bodies, so that the fixed bending area is bent towards the non-light-emitting surface of the flexible display screen through the elastic restoring force of the elastic structure bodies to form a curved surface structure, thereby reducing the thickness of the material of the supporting plate, simultaneously adding the elastic structure bodies into the whole structure to maintain the curved surface structure with fixed curvature of the edge (namely the fixed bending area), and simultaneously having simple manufacturing process, and the curved surface structure with fixed curvature of the edge can be realized only by installing the elastic structure bodies.
Drawings
Fig. 1 is a partial sectional structural view of an elastic structure body of a display device according to an exemplary embodiment of the present application.
Fig. 2 is a partial cross-sectional structural view of a display device according to an exemplary embodiment of the present application in which the number of groups of elastic structures is one.
Fig. 3 is a schematic partial cross-sectional structure diagram of a display device according to an exemplary embodiment of the present application in which the number of groups of elastic structures is two.
Fig. 4 is a schematic partial cross-sectional structure diagram of a display device according to an exemplary embodiment of the present application in which the number of groups of elastic structural bodies is three.
Fig. 5 is a schematic partial cross-sectional structure diagram of a display device according to an exemplary embodiment of the present application in which the number of groups of elastic structural bodies is four.
Fig. 6 is a schematic partial bottom view of a display device according to an exemplary embodiment of the present disclosure, in which the number of elastic structures is four.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "plurality" includes two, and is equivalent to at least two. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
As can be understood from fig. 1 to fig. 6, the present embodiment provides a display device. The display device includes a flexible display 10, and the flexible display 10 includes a main display area a and a fixed bending area B located outside the main display area a in a first direction D1. The end of the fixed bending region B away from the main display region a is a terminal B1, and the end close to the main display region a is a start end B2.
The display device further includes: a holder 20 and at least one set of resilient structures 30.
The fixing base 20 is located on one side of the non-light-emitting surface of the flexible display 10, the fixing base 20 is disposed corresponding to the fixed bending area B, and the fixing base 20 is disposed along a second direction D2 perpendicular to the first direction D1.
It should be noted that the first direction D1 may be a width direction or a length direction of the flexible display screen 10 (the two directions are perpendicular to each other), and when the first direction D1 is the width direction of the flexible display screen 10, correspondingly, the second direction D2 is the length direction of the flexible display screen 10; when the first direction D1 is the length direction of the flexible display 10, the second direction D2 is the width direction of the flexible display 10.
The fixed bending region B is located outside the main display region a, and it is understood that the fixed bending region B is located outside the main display region a in a length direction, or the fixed bending region B is located outside the main display region a in a width direction. Further, the fixed bent areas B are located outside of the corresponding both sides of the main display area a in the first direction D1.
Each group of the elastic structures 30 includes a plurality of elastic structures 31 having elastic restoring force in the height direction H thereof, the plurality of elastic structures 31 in the same group have the same length and are spaced apart from each other in a second direction D2 perpendicular to the first direction D1, and the elastic structures 31 in different groups have different lengths. Along the height direction H of the elastic structural bodies 31, one end of each elastic structural body 31 is connected to the fixing base 20, and the other end is connected to the non-light-emitting surface of the flexible display 10 and connected to the fixed bending region B, so that the fixed bending region B is bent toward the non-light-emitting surface of the flexible display 10 by the elastic restoring force of the elastic structural bodies 31 to form a curved surface structure. By providing a plurality of elastic structures 31 in each set of elastic structures 30, the bending of the fixed bending region B can be made more uniform.
The bending angle of the starting end B2 of the fixed bending region B is 0 °, and the bending angle θ of the terminal end B1 of the fixed bending region B is 90 ° at the maximum.
Specifically, the elastic structural body 31 is a spring, and as shown in fig. 1, the elastic structural body 31 has an elastic restoring force in the height direction H of itself. However, the elastic structure 31 may be another elastic member having an elastic restoring force in the height direction H thereof.
Specifically, the fixing base 20 is a fixing shaft, and when the number of the groups of the elastic structural bodies 31 is multiple, the multiple groups of the elastic structural bodies 30 are sequentially connected to the outer periphery of the fixing shaft along the circumferential direction of the fixing shaft.
As shown in fig. 2, when there are one group of elastic structures 31, one end of the group of elastic structures 30 connected to the non-light-emitting surface of the flexible display 10 is located at a terminal B1 of the fixed bending area B.
As shown in fig. 3, when there are two sets of elastic structural bodies 31, one end of one set of elastic structural body 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at a terminal B1 of the fixed bending area B, and one end of the other set of elastic structural body 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at a starting end B2 of the fixed bending area B, or located between a starting end B2 and a terminal B1 of the fixed bending area B.
As shown in fig. 4, when there are three sets of elastic structural bodies 31, one end of one set of elastic structural body 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at a terminal B1 of the fixed bending area B, one end of the other set of elastic structural body 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at a start end B2 of the fixed bending area B, and one end of the other set of elastic structural body 30 connected to the non-light-emitting surface of the flexible display panel 10 is located between a start end B2 and a terminal B1 of the fixed bending area B.
Further, as shown in fig. 5, when the number of the groups of the elastic structural bodies 31 is three or more (specifically, four groups in the present embodiment), one end of one group of the elastic structural bodies 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at the terminal B1 of the fixed bending area B, one end of the other group of the elastic structural bodies 30 connected to the non-light-emitting surface of the flexible display panel 10 is located at the start end B2 of the fixed bending area B, and the other groups of the elastic structural bodies 30 (specifically, two groups in the present embodiment) are located between the start end B2 and the terminal B1 of the fixed bending area B, and the groups of the elastic structural bodies 30 are spaced apart from one end of the flexible display panel 10 connected to the non-light-emitting surface.
As shown in fig. 6, the flexible display panel 10 in fig. 6 is in a state where the fixed bending area B is not yet bent, so as to show the arrangement of the four sets of elastic structures 30 at the end connected with the non-light-emitting surface of the flexible display panel 10. The four groups of elastic structures 30 are arranged at intervals in sequence from the terminal B1 of the fixed bending area B to the starting end B2 along the first direction D1 at the end connected with the non-light-emitting surface of the flexible display screen 10.
The plurality of elastic structures 31 in the same group are spaced apart from each other in the second direction D2 by a distance of 2mm to 10mm, and preferably by a distance of 4mm to 6 mm. By arranging the plurality of elastic structures 31 in the same group at intervals in the second direction D2 such that the elastic structures 31 in the same group are arranged in an equidistant array, uniform tension can be provided by the elastic restoring force of each of the elastic structures, thereby maintaining a smooth curve of the curved structure of the fixed bending region B.
As described above, the elastic structural body 31 is a spring, and the tensile force F of each spring to the fixed bending region B can be calculated by the following formula:
F＝K*(L-L0)
wherein, K is the stiffness coefficient of the spring, and the stiffness coefficient is 2 x 10 according to the actual design requirement2N/m～3*103Spring of N/m L0Which is the initial length of the spring, i.e., the length when not subjected to any force, and L, which is the stretched length of the spring, i.e., the length when the spring is stretched to generate an elastic restoring force, thereby providing a tensile force.
In order to make the curvature radius of the curved surface structure formed by the fixed bending area B be 3 mm-5 mm, the tensile force F required to be provided is 5N-20N.
Thus, by arranging a plurality of groups of elastic structural bodies 30, the arc-shaped curve of the curved surface structure formed by the fixed bending area B can be better controlled, and different design requirements can be met.
In this embodiment, the flexible display panel 10 includes a flexible display panel 11 and a supporting plate 12 stacked together, the supporting plate 12 is located between the flexible display panel 11 and the fixing base 20, and the elastic structure 31 is connected to the supporting plate 12. From the direction close to the supporting plate 12 to the direction far away from the supporting plate 12, the flexible display panel 11 includes a functional film layer and a cover plate covering the functional film layer.
One end of each elastic structure 31 is connected to the fixing base 20, and the other end is connected to the supporting plate 12. The material of the support plate 12 is an aluminum alloy. The thickness of the support plate 12 is 20um to 50 um.
The cover plate of the flexible display panel 11 is a single-layer or double-layer structure, and the material of the cover plate is one of PI, PET, and PEN. Wherein, the English letters of PI are all called as: polyimide, corresponding to chinese: a polyimide; the English name of PET is: polyethylene terephthalate, corresponding Chinese is: polyethylene terephthalate; PEN is short for polyethylene naphthalate. The thickness of the cover plate of the flexible display panel 11 is 40um to 200 um.
The connection mode of the elastic structure 31 and the flexible display screen 10 can be a welding connection mode under the condition that the support plate 12 and the elastic structure 31 are both made of metal, or can be a connection mode by means of a fixing piece, for example, a hook is arranged on the support plate 12, and one end of the elastic structure 31 is hung in the hook to realize connection; similarly, the connection mode between the elastic structure 31 and the fixed base 20 may be the above mode, and the elastic structure 31 and the fixed base 20 may be connected by providing a bayonet on the fixed base 20 and engaging one end of the elastic structure 31 with the bayonet.
In the manufacturing process, the support plate 12 connected with one end of the elastic structure 31 can be attached to the display panel, and then the other end of the elastic structure 31 is gathered together and connected to the fixed seat 20 through an integral bayonet combination; the supporting plate and the display panel can be attached to each other, and then the curved surface structure of the fixed bending area B is generated in the process of integrating the supporting plate and the display panel into the fixing seat 20 through the elastic structure body 31, so that the process for manufacturing the curved surface structure of the fixed bending area B is simplified in both modes.
The support plate 12 has a strong strength (the strength of the support plate 12 is 150 GPa-250 GPa), and can be used for controlling the bending appearance. The support plate 12 may be attached to the display panel by an Optical Clear Adhesive (OCA), specifically, may be attached to a surface of the functional film layer in the display panel, and the OCA has a low elastic modulus (the elastic modulus of the OCA is 15KPa to 100MPa), so that the OCA can be easily deformed to balance stress, thereby protecting the functional film layer of the display panel.
The main display area A is also internally provided with a dynamic bending area a which can be bent towards the non-light-emitting surface of the flexible display screen 10, and the formed curvature radius is 3 mm-5 mm.
In this embodiment, the thickness of the material of the support plate is reduced, and at the same time, the elastic structure is added to the whole structure to maintain the curved surface structure with fixed curvature of the edge (i.e. the fixed bending area), and the manufacturing process is simple, and the curved surface structure with fixed curvature of the edge can be realized only by installing the elastic structure.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (12)
1. A display device, comprising a flexible display screen including a main display area and a fixed bending area located outside the main display area along a first direction, the display device further comprising:
the fixed seat is positioned on one side of the non-light-emitting surface of the flexible display screen, the fixed seat is arranged corresponding to the fixed bending area, and the fixed seat is arranged along a second direction perpendicular to the first direction;
the flexible display screen comprises at least one group of elastic structure bodies, each group of elastic structure bodies comprises a plurality of elastic structure bodies with elastic restoring force along the height direction of the elastic structure bodies, the elastic structure bodies in the same group are same in length and are arranged at intervals along a second direction perpendicular to the first direction, the elastic structure bodies in different groups are different in length, one end of each elastic structure body is connected with the fixed seat, the other end of each elastic structure body is connected with the non-light-emitting surface of the flexible display screen and is connected with the fixed bending area, and the fixed bending area is bent towards the non-light-emitting surface of the flexible display screen through the elastic restoring force of the elastic structure bodies to form a curved surface structure.
2. The display device of claim 1, wherein an end of the fixed bending region near the main display region is a starting end and an end far from the main display region is a terminating end, wherein,
when the number of the groups of the elastic structure bodies is one, one end of the group of the elastic structure bodies, which is connected with the non-light-emitting surface of the flexible display screen, is positioned at the terminal of the fixed bending area;
when the number of the groups of the elastic structure bodies is two, one end of one group of the elastic structure bodies connected with the non-light-emitting surface of the flexible display screen is positioned at the terminal of the fixed bending area, and the other end of the other group of the elastic structure bodies connected with the non-light-emitting surface of the flexible display screen is positioned at the starting end of the fixed bending area or positioned between the starting end and the terminal of the fixed bending area;
when the number of the groups of the elastic structures is at least three, one end of one group of the elastic structures connected with the non-light-emitting surface of the flexible display screen is located at the terminal of the fixed bending area, the other end of the other group of the elastic structures connected with the non-light-emitting surface of the flexible display screen is located at the starting end of the fixed bending area, the other ends of the other groups of the elastic structures connected with the non-light-emitting surface of the flexible display screen are located between the starting end and the terminal of the fixed bending area, and when the number of the other groups of the elastic structures is at least two, the other groups of the elastic structures are arranged at intervals at the end connected with the non-light-emitting surface of the flexible display screen.
3. The display device according to claim 1, wherein the flexible display panel includes a flexible display panel and a supporting plate stacked on each other, the supporting plate is located between the flexible display panel and the fixing base, and the elastic structure is connected to the supporting plate.
4. The display device according to claim 3, wherein a material of the support plate is an aluminum alloy.
5. The display device according to claim 3, wherein the support plate has a thickness of 20 to 50 um.
6. The display device according to claim 3, wherein the cover of the flexible display panel has a single-layer or double-layer structure, and the material of the cover is one of PI, PET, and PEN.
7. The display device of claim 3, wherein a thickness of the cover plate of the flexible display panel is 40-200 um.
8. The display device according to claim 1, wherein a plurality of the elastic structures in the same group are provided at intervals of 2mm to 10mm in the second direction.
9. The display device as claimed in claim 1, wherein the fixing base is a fixing shaft, and when the number of the groups of the elastic structural bodies is plural, the plural groups of the elastic structural bodies are sequentially connected to the outer circumference of the fixing shaft along the circumferential direction of the fixing shaft.
10. The display device according to claim 1, wherein the curved structure has a radius of curvature of 3mm to 5 mm.
11. The display device as claimed in claim 1, wherein a dynamic bending region is further disposed in the main display region, the dynamic bending region can be bent towards the non-light-emitting surface of the flexible display screen, and the radius of curvature is 3mm to 5 mm.
12. The display apparatus according to any one of claims 1 to 11, wherein the elastic structure is a spring.
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| CN111963830A (en) * | 2020-08-17 | 2020-11-20 | 康佳集团股份有限公司 | Display and one-screen multi-display method |
| CN111963830B (en) * | 2020-08-17 | 2022-04-22 | 康佳集团股份有限公司 | Display and one-screen multi-display method |
| CN112365804A (en) * | 2020-11-26 | 2021-02-12 | 武汉天马微电子有限公司 | Display module and display device |
| CN112614433A (en) * | 2020-12-29 | 2021-04-06 | 武汉华星光电半导体显示技术有限公司 | Flexible display panel and flexible display device |
| US12007812B2 (en) | 2020-12-29 | 2024-06-11 | Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Flexible display panel and flexible display device |
| CN115223444A (en) * | 2021-04-20 | 2022-10-21 | 北京小米移动软件有限公司 | Flexible display screen and electronic equipment |
| CN114927065A (en) * | 2022-06-07 | 2022-08-19 | 武汉天马微电子有限公司 | Display device |
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