CN112185257A - Flexible display device and control method - Google Patents
Flexible display device and control method Download PDFInfo
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- CN112185257A CN112185257A CN202011067650.XA CN202011067650A CN112185257A CN 112185257 A CN112185257 A CN 112185257A CN 202011067650 A CN202011067650 A CN 202011067650A CN 112185257 A CN112185257 A CN 112185257A
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- flexible display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Abstract
The application discloses a flexible display device and a control method, wherein the flexible display device comprises a flexible display panel, wherein an intensity adjusting device is arranged on one surface of the flexible display panel, which is far away from a display surface; the strength adjusting device is used for increasing the elastic modulus of the flexible display device when the opening position of the flexible display device reaches a set position, and reducing the elastic modulus of the flexible display device when the flexible display device is closed. According to the technical scheme provided by the embodiment of the application, the strength adjusting device is arranged on the flexible display panel, when the flexible display panel returns to the flat state from other states such as folding, curling and the like, the stiffness and the flatness of the whole flexible display panel are increased through the increase of the elastic modulus of the strength adjusting device, and the using effect and the using quality of the flexible display panel are improved.
Description
Technical Field
The present invention relates generally to the field of display technologies, and in particular, to a flexible display device and a control method thereof.
Background
Currently, flexible display can be realized by a Liquid Crystal Display (LCD) and an Organic Light Emitting Diode (OLED) display panel. The OLED display manufactured on the flexible substrate can easily realize bendable display with smaller bending radius due to the self-luminous characteristic. Therefore, the fabrication of OLED display panels including flexible substrates has attracted a great deal of attention.
With the technical requirements of products, the demand of flexible products is increasing, and bending deformation products, folding products and even deformable products gradually come into the sight of consumers.
The dynamic product application puts more strict requirements on the reliability of the product, and the display device is very easy to damage due to the fact that a large number of inorganic layers and organic layers exist on the display device, and various mechanical properties of the layers are greatly different. For example, the back panel of currently used foldable products has a constant modulus in the folded region, and after repeated folding, the flatness of the back panel is easily observed to decrease in the unfolded state.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a flexible display device and a control method.
In a first aspect, a flexible display device is provided, which includes a flexible display panel, wherein an intensity adjusting device is disposed on a surface of the flexible display panel, the surface being away from a display surface;
the strength adjusting device is used for increasing the elastic modulus of the flexible display device when the opening position of the flexible display device reaches a set position, and reducing the elastic modulus of the flexible display device when the flexible display device is closed.
In a second aspect, a flexible display device control method is provided, including: when the opening position of the flexible display device is detected to reach the set position,
the elastic modulus of the strength adjusting device is gradually increased until the flexible display device is opened to a flat position;
when it is detected that the flexible display device is closed,
the elastic module of the intensity adjustment device is reduced to an initial value.
According to the technical scheme provided by the embodiment of the application, the strength adjusting device is arranged on the flexible display panel, when the flexible display panel returns to the flat state from other states such as folding, curling and the like, the stiffness and the flatness of the whole flexible display panel are increased through the increase of the elastic modulus of the strength adjusting device, and the using effect and the using quality of the flexible display panel are improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a schematic diagram of a flexible display device according to an embodiment;
FIG. 2 is a schematic structural diagram of a flexible display device according to another embodiment;
FIG. 3 is a top view of FIG. 2;
fig. 4 is a schematic structural diagram of a flexible display device in another embodiment.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 and fig. 2, the present embodiment provides a flexible display device, including a flexible display panel 1, wherein an intensity adjusting device 2 is disposed on a surface of the flexible display panel 1 facing away from a display surface;
the strength adjusting device 2 is used for increasing the elastic modulus of the flexible display device when the opening position of the flexible display device reaches a set position, and reducing the elastic modulus of the flexible display device when the flexible display device is closed.
According to the technical scheme provided by the embodiment of the application, the strength adjusting device is arranged on the flexible display panel, when the flexible display panel returns to the flat state from other states such as folding, rolling and the like, the stiffness and the flatness of the whole flexible display panel are increased through the increase of the elastic modulus of the strength adjusting device, the using effect and the using quality of the flexible display panel are improved, meanwhile, when the product is closed, the elastic modulus of the strength adjusting device is reduced to the initial value, and the using process, the folding and rolling process of the product are not influenced.
In this embodiment, the strength adjusting device is disposed on the back surface of the flexible display panel, and when the flexible display panel is unfolded from other states to a flat state for use, the stiffness and the flatness of the flexible display panel are both increased by increasing the elastic modulus of the strength adjusting device; the flexible display panel in this embodiment has a plurality of flexible display modes, such as folding, curling, stretching, and any flexible deformation mode can increase the elastic modulus through the strength adjusting device after deformation, thereby further improving the reliability of the flexible display panel. Taking a folding form as an example, the elastic modulus of the back structure of the flexible display panel is relatively low and is about 1-4Gpa, when the folding action is carried out, the lower elastic module can ensure that the device has better bending performance, when the flexible display device is unfolded, the strength adjusting device is opened, the modulus is correspondingly increased by 5-10Gpa, the stiffness of the flexible display device is increased, the flatness is increased, and therefore the using effect of the product is ensured.
Further, the intensity adjusting device 2 comprises a magnetic induction layer 21 and a magnetorheological layer 22, wherein the magnetic induction layer 21 is used for generating or closing a magnetic field, and the magnetorheological layer 22 is used for increasing the elastic modulus when the magnetic induction layer generates the magnetic field and reducing the elastic modulus when the magnetic field is closed.
The strength adjusting device in this embodiment is composed of a magnetic induction layer and a magnetorheological layer, the magnetic induction layer is used for generating a magnetic field according to the instruction of the flexible display device, the magnetorheological layer changes the elastic modulus under the action of the magnetic field, for example, when the magnetic field is gradually enhanced, the elastic modulus of the magnetorheological layer is gradually increased, when the magnetic field is gradually weakened, the elastic modulus of the magnetorheological layer is gradually reduced, when the elastic module of the magnetorheological layer is enhanced, the flatness of the flexible display panel is correspondingly increased, when the flexible display panel is switched to the flat state from the folded or curled state and other deformation states, the magnetorheological layer with the increased elastic modulus can increase the stiffness and the flatness of the display panel, so that the display panel is bent or curled in a more flat position.
Further, the magnetic induction layer is specifically used for generating a magnetic field when the opening position of the flexible display device reaches a set position; the magnetic field is switched off when the flexible display device is switched off.
In this embodiment, the flexible display device needs to be supported in an unfolded state, and therefore, when the flexible display device is opened to a certain extent, the magnetic induction layer needs to generate a magnetic field, and the elastic modulus of the magnetorheological layer is further increased; when the flexible display device is closed, the magnetic field needs to be closed, so that the elastic modulus of the magnetorheological layer is reduced, and the deformation function of the product is not influenced.
Further, the magnetic induction layer 21 is close to the flexible display panel 1, and the magnetorheological layer 22 is disposed on one side of the magnetic induction layer 21 away from the flexible display panel 1.
As shown in fig. 1, an embodiment of the flexible display device is shown, in this embodiment, the intensity adjustment device is configured to overlap the magnetic induction layer and the magnetorheological layer, the magnetic induction layer is disposed on the back surface of the flexible display panel, and the magnetorheological layer is disposed on the other side of the magnetic induction layer. The magnetic rheological layer and the magnetic induction layer are arranged on the back surface of the flexible display panel in an overlapping mode, so that the flexible display panel can be suitable for most flexible display devices and most deformation modes, such as a folding mode or a rolling mode, and the supporting effect of the flexible display panel cannot be influenced by the folding mode.
Further, the magnetorheological layer 22 is arranged on the side of the flexible display panel far away from the display surface 1,
the magnetic induction layer includes first magnetic induction layer 21 and second magnetic induction layer 23 at least, first magnetic induction layer 21 with second magnetic induction layer 23 sets up magnetorheological layer 22 both sides.
As shown in fig. 2 and fig. 3, another embodiment of the flexible display device is shown, in this embodiment, the magnetic induction layer includes at least two magnetic induction layers, which are a first magnetic induction layer and a second magnetic induction layer respectively, and are disposed on two sides of the magnetorheological layer respectively, and the magnetic induction layer and the magnetorheological layer are both disposed on the back of the flexible display panel, and a magnetic field is applied to two sides of the magnetorheological layer through the two magnetic induction layers to change the elastic modulus of the magnetorheological layer; wherein magnetic induction layer's setting quantity can be confirmed according to the size of specific flexible display panel or the scope of deformation, for example, when flexible display device area is great, the folding or the range that needs support under the state of curling resumes to the flat state is great, can all set up the magnetic induction layer around the both sides or the cubic on magnetorheological layer even. The magnetic induction layers are arranged on the two sides of the magnetorheological layer in the embodiment and further arranged on the back of the flexible display panel, the flexible display device is also applicable to most of flexible display devices and most of deformation modes, and the flexible display device can be particularly used for folding flexible display devices, for example, the first magnetic induction layer and the second magnetic induction layer are arranged at the folding position in a targeted mode, the magnetorheological layer at the folding position is influenced by a magnetic field, and the effect is achieved.
Further, the flexible display device comprises a deformable area 11, and the intensity adjustment device 2 is specifically arranged in the deformable area 11.
The flexible display device in this embodiment is folded, curled, and the like, and when the flexible display device is unfolded into a flat display device, the elastic modulus needs to be enhanced at the folded position, because these positions are the situations that the display device is easy to generate creases, and the like, and the phenomenon of generating the flatness of the whole screen can occur, therefore, the strength adjusting device can be set at the deformable region with strong adjustability, for example, the folded position of the foldable display screen shown in fig. 4, and this setting mode saves resources, and at the same time, after the display device is completely opened, the elastic modulus of the strength adjusting device is increased, and the flatness of the display device is increased in a targeted manner.
Further, the magnetorheological layer material is a magnetorheological elastomer.
In the embodiment, the magnetorheological elastomer is adopted to prepare the magnetorheological layer, and the magnetorheological elastomer is prepared by doping ferromagnetic particles with micron scale into a high molecular polymer and curing the mixture in a magnetic field environment, so that the particles in the matrix have a chain or columnar structure and have the characteristics of controllability, reversibility, quick response and the like; the magnetorheological material specifically comprises rubber, iron powder, modified iron powder and a plasticizer, the rubber is used as a main material and is a high-molecular polymer, the defects of easiness in sedimentation and poor stability of the conventional magnetorheological fluid can be effectively overcome, meanwhile, the tensile strength and the tear strength of natural rubber are high, and the butyl rubber is used as a material with the structure closest to the natural rubber in synthetic rubber and also can be used as a main material; soft magnetic particles such as iron powder and modified iron powder, etc. are uniformly fixed in the host material by physicochemical means such as, but not limited to, kneading, wherein the modified iron powder is carbonyl iron powder; and additives such as a plasticizer and the like are also included, so that the magnetorheological layer is more stable.
Furthermore, the magnetic induction layer is more than one magnetic induction coil.
In this embodiment, a magnetic induction coil is used as a specific structure of the magnetic induction layer, wherein one magnetic induction coil can be used, and the magnetic induction coil receives a changing current to generate a magnetic field, and the magnetic field acts on the magnetorheological layer to change the elastic modulus of the magnetorheological layer;
because the flexible display panel in this embodiment can be in a folding, curling or even local deformation form, the strength adjustment requirements for each position of the flexible display panel are different, taking the flexible display panel in a curling form as an example, the curled flexible display panel generates a stress concentration phenomenon at the curled tail end, therefore, the elastic modulus of the strength adjustment device needs to be larger at the tail end of the flexible display panel, and therefore, a plurality of magnetic induction coils are further arranged, currents with different strengths flow in different magnetic induction coils, different magnetic field strengths are generated, different elastic moduli are arranged at corresponding different positions on a further magnetic rheological layer, the position where the strength is required to be enhanced is enhanced, and the flatness of the flexible display panel can be effectively and pertinently adjusted.
The present embodiment further provides a method for controlling a flexible display device, including: detecting that the opening position of the flexible display device reaches a set position;
the elastic modulus of the strength adjusting device is gradually increased until the flexible display device is opened to a flat position;
when it is detected that the flexible display device is closed,
the elastic module of the intensity adjustment device is reduced to an initial value.
The back of the flexible display device in the embodiment is provided with the strength adjusting device, and when the flexible display device is opened to a set position, the strength adjusting device increases the elastic modulus, so that when the flexible display device is completely opened to be in a flat state, the overall flatness is increased, and the stiffness of the display device is ensured.
The flexible display device may be folded, curled, deformed, or the like, for example, the folded flexible display device may detect an opening angle of the device, and when the opening angle reaches a certain value, the magnetic induction layer in the intensity adjustment device generates a magnetic field, so that an elastic modulus of the intensity adjustment device is increased; still another example is a rolled flexible display device that can detect the opening range of the device, and when the opening range reaches a certain value, for example, the opening range is 80% of the entire display device, the magnetic induction layer in the intensity adjustment device generates a magnetic field, so that the elastic modulus of the intensity adjustment device becomes large.
In the embodiment, the strength adjusting device is arranged on the flexible display panel, when the flexible display panel is restored to the flat state from other states such as folding, curling and the like, the stiffness and the flatness of the whole flexible display panel are increased through the increase of the elastic modulus of the strength adjusting device, and the using effect and the using quality of the flexible display panel are improved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. A flexible display device is characterized by comprising a flexible display panel, wherein an intensity adjusting device is arranged on one surface of the flexible display panel, which is far away from a display surface;
the strength adjusting device is used for increasing the elastic modulus of the flexible display device when the opening position of the flexible display device reaches a set position, and reducing the elastic modulus of the flexible display device when the flexible display device is closed.
2. The flexible display device according to claim 1, wherein the intensity adjustment device comprises a magnetic induction layer for generating or switching off a magnetic field and a magneto-rheological layer for increasing the elastic modulus when the magnetic induction layer generates the magnetic field and decreasing the elastic modulus when the magnetic field is switched off.
3. The flexible display device according to claim 2, wherein the magnetic induction layer is specifically configured to generate a magnetic field when the open position of the flexible display device reaches a set position; the magnetic field is switched off when the flexible display device is switched off.
4. The flexible display device according to claim 2, wherein the magnetic induction layer is disposed on a side of the flexible display panel away from the display surface, and the magnetorheological layer is disposed on a side of the magnetic induction layer away from the flexible display panel.
5. The flexible display device according to claim 2, wherein the magneto-rheological layer is arranged on a side of the flexible display panel facing away from the display surface,
the magnetic induction layer includes first magnetic induction layer and second magnetic induction layer at least, first magnetic induction layer with second magnetic induction layer sets up magnetorheological layer both sides.
6. The flexible display device according to any of claims 1-5, wherein the flexible display device comprises a deformable area, the intensity adjustment means being in particular arranged in the deformable area.
7. The flexible display device of claim 6, wherein the magnetorheological layer material is a magnetorheological elastomer.
8. The flexible display device of claim 5, wherein the magnetic induction layer is one or more magnetic induction coils.
9. A method of controlling a flexible display device according to any one of claims 1 to 8, comprising: when the opening position of the flexible display device is detected to reach the set position,
the elastic modulus of the strength adjusting device is gradually increased until the flexible display device is opened to a flat position;
when it is detected that the flexible display device is closed,
the elastic module of the intensity adjustment device is reduced to an initial value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011067650.XA CN112185257A (en) | 2020-09-30 | 2020-09-30 | Flexible display device and control method |
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| CN202011067650.XA CN112185257A (en) | 2020-09-30 | 2020-09-30 | Flexible display device and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023124473A1 (en) * | 2021-12-28 | 2023-07-06 | Oppo广东移动通信有限公司 | Flexible screen supporting apparatus and electronic device |
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