Magnetic fluid form precision control device and display device

Abstract

This invention belongs to the field of magnetohydrodynamic (MHD) equipment technology. It provides a precise control device and display device for the magnetic fluid pattern, comprising a accommodating cavity and a control layer. The accommodating cavity has a first surface near the control layer and a second surface away from the control layer. A limiting region is provided between the first and second surfaces, and the limiting region has at least one opening for the flow of magnetohydrodynamic fluid. The magnetic field of the control layer passing through the first surface restricts the flow of magnetohydrodynamic fluid within the limiting region. This invention achieves precise control of the magnetohydrodynamic pattern by pre-setting the limiting region.

Description

Technical Field

[0001] This application relates to the field of magnetohydrodynamics, and more specifically, to a magnetohydrodynamic morphology precision control device and display device. Background Technology

[0002] Magnetofluid, also known as magnetic liquid, is a novel type of functional material that combines the fluidity of a liquid with the magnetic properties of a solid magnetic material. A magnetic liquid is a stable colloidal liquid composed of magnetic solid particles with a diameter of less than 10 nanometers, a carrier liquid, and a surfactant. It exhibits no magnetic attraction when static, but becomes magnetic when an external magnetic field is applied. Therefore, it has wide applications in practice and also holds significant theoretical research value.

[0003] Existing magnetofluid products involve the magnetofluid moving freely within a cavity and taking shape based on a magnetic field. However, the range of the magnetic field entering the cavity is difficult to control, resulting in a lack of precise control over the size of the magnetofluid pattern. For example, it's difficult to form a portrait or image as desired; due to its fluid properties, the magnetofluid will only produce rounded edges for all the patterns. Therefore, there is an urgent need for a method that can precisely control the pattern formation of magnetofluids. Summary of the Invention

[0004] This application provides a magnetofluid morphology precision control device and display device, aiming to solve the technical problem that the pattern formed by magnetofluid cannot be precisely controlled in the prior art.

[0005] The first aspect of this application provides a magnetohydrodynamic (MHD) morphology precision control device, including a accommodating cavity and a control layer. The accommodating cavity has a first surface near the control layer and a second surface away from the control layer. A limiting region is provided between the first surface and the second surface. The limiting region has at least one opening for the flow of magnetohydrodynamic fluid. The magnetic field of the control layer passing through the first surface restricts the flow of magnetohydrodynamic fluid within the limiting region.

[0006] Optionally, the first surface includes a first region and a second region, the first region corresponding to the shape-limiting region, and the second region restricting the magnetic field of the control layer so that the flow of the magnetofluid in the second region is not restricted.

[0007] Optionally, one side of the sidewall of the limiting region abuts against the first surface, and the other side abuts against the second surface. The opening is provided on the sidewall, and the sidewall restricts part or all of the magnetic field of the control layer from passing through.

[0008] Optionally, the control layer is provided with a magnet that forms at least one magnetic field pattern.

[0009] Optionally, the magnet includes a plurality of magnet units, which together form at least one of the magnetic field patterns.

[0010] Optionally, the control layer further includes a limiting layer, which is a single-layer or multi-layer structure. When the limiting layer is a single-layer structure, a first pattern that can open the magnetic field is provided on the limiting layer. The first pattern limits the magnetic field of the magnetic layer and opens all or part of the magnetic field. When the limiting layer is a multi-layer structure, the limiting layer is provided with a second pattern and a third pattern that can open the magnetic field. The second pattern and the third pattern are respectively provided on different horizontal planes to jointly limit the magnetic field of the magnetic layer and open all or part of the magnetic field.

[0011] Optionally, when the limiting layer is a single-layer structure, the limiting layer and the magnet can move relative to each other; when the limiting layer is a multi-layer structure, the second pattern and the third pattern can move relative to each other.

[0012] Optionally, the control layer is provided with a driver that drives the magnet or the limiting layer to move.

[0013] Optionally, the magnet unit is an electromagnet.

[0014] The present invention provides a second aspect of a display device, including the magnetohydrodynamic morphology precision control device described in any one of the above embodiments.

[0015] Beneficial effects:

[0016] The magnetofluid morphology precision control device of the present invention includes a accommodating cavity and a control layer. A limiting zone is set in the accommodating cavity, and the magnetic field in the control layer is used to control the formation of the magnetofluid in the limiting zone. The magnetofluid pattern control is achieved by presetting the limiting zone.

[0017] The magnetofluid morphology precision control device of the present invention isolates or weakens the magnetic field in the control layer from penetrating into the cavity through the sidewall by setting a sidewall between the first and second surfaces of the accommodating cavity. The sidewall further blocks the magnetic field, so that the magnetofluid can be accurately shaped within the limiting area.

[0018] The present invention effectively realizes the switching of magnetofluid patterns in the confined area by setting a magnet capable of forming at least two magnetic field patterns in the control layer and using a driver to drive the switching of magnetic field patterns.

[0019] In this invention, a shape-limiting layer is set in the control layer to block the magnetic field, thereby making the patterns in the display device more diverse.

[0020] In this invention, the limiting layer and the magnet can move relative to each other, so the magnetic field pattern on the magnet also changes accordingly, thereby changing the pattern in the display device and increasing the diversity of the display device pattern.

[0021] In this invention, the limiting layer is set as a multi-layer structure, and the limiting elements in the limiting layer at different horizontal planes limit the magnetic field of the magnet, thereby increasing the diversity of patterns in the display device. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a magnetohydrodynamic morphology precision control device proposed in an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of a mobile phone case using a magnetohydrodynamic morphology precision control device proposed in one embodiment of this application;

[0025] Figure 3 This is an exploded view of the control layer of a magnetohydrodynamic morphology precision control device proposed in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the effect of a mobile phone case using a magnetohydrodynamic morphology precision control device proposed in one embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Receptacle cavity; 11. First surface; 12. Second surface; 13. First region; 14. Second region; 2. Control layer; 21. Driver; 22. Form limiting layer; 221. First form limiting element; 222. Second form limiting element; 23. Rotating belt; 24. Magnet. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] To facilitate understanding of this technology, the relevant technical terms used in this application are explained below.

[0030] Magnetofluids, also known as magnetic liquids, ferrofluids, or magnetic fluids, are a new type of functional material that combines the fluidity of liquids with the magnetic properties of solid magnetic materials. They are stable colloidal liquids composed of magnetic solid particles with diameters on the nanometer scale (below 10 nanometers), a carrier liquid (also called a medium), and surfactants. This fluid has no magnetic attraction when static, but exhibits magnetism when an external magnetic field is applied. Magnetofluids produced using nano-metal and alloy powders exhibit excellent performance and can be widely used in various demanding applications such as magnetic fluid sealing, vibration damping, medical devices, sound control, optical displays, and magnetic fluid mineral processing.

[0031] Existing magnetofluid products involve the magnetofluid moving freely within a cavity and manifesting according to a magnetic field. However, the range of the magnetic field entering the cavity is difficult to control, resulting in imprecise control over the size of the manifested image. For example, it's difficult to form a portrait as needed; due to its fluid properties, the magnetofluid will only produce rounded edges for all the edges of the image. When the magnetofluid product is small, it's practically impossible to form the desired pattern, such as a digital clock display on a watch or a portrait outline image.

[0032] In view of this, this application proposes a magnetofluid morphology precision control device for magnetofluid control.

[0033] like Figure 1-4 As shown, this embodiment provides a magnetofluid morphology precision control device, including a accommodating cavity 1 and a control layer 2. A flowing magnetofluid is disposed within the accommodating cavity 1, and the control layer 2 is used to control the flow of the magnetofluid within the accommodating cavity 1.

[0034] like Figure 1 As shown, the accommodating cavity 1 further has a first surface 11 close to the control layer 2 and a second surface 12 away from the control layer 2. A first region 13 and a second region 14 are provided between the first surface 11 and the second surface 12. The first region 13 is a confining region. The flow of the magnetic fluid in the first region 13 will be affected by the magnetic field of the control layer 2. Therefore, the magnetic fluid in the confining region will flow according to the magnetic field. The second region 14 is a flow region where the magnetic fluid can flow freely. The flow of the magnetic fluid in the second region 14 will not be affected by the magnetic field of the control layer 2.

[0035] like Figure 1 As shown, the limiting region is similar to a cavity, mainly composed of a first surface 11, a second surface 12, and sidewalls at both ends that abut against the first surface 11 and the second surface 12, respectively. At least one opening (not shown) for the flow of magnetic fluid is provided on the sidewall. The magnetic fluid in the accommodating cavity 1 can enter from one limiting region to another through the opening on the sidewall, or enter the flow region from the limiting region, or the magnetic fluid can flow from the flow region into the limiting region.

[0036] In this embodiment, the accommodating cavity 1 is provided with multiple limiting areas and multiple flow areas. Generally, the limiting areas and flow areas are preset according to the product requirements. The position and volume of the limiting areas and flow areas are not fixed. The volume of the limiting area can be greater than or less than or equal to the flow area.

[0037] It should be further explained that the sidewalls of the limiting zone restrict some or all of the magnetic field from passing through the control layer 2, preventing or weakening the magnetic field from the control layer 2 from entering the second zone through the sidewalls and affecting its fluidity. This allows the magnetic fluid outside the limiting zone to remain fixed and visible, thus affecting the overall shape of the magnetic fluid and ensuring the limiting effect. Generally, the sidewalls and the second zone can achieve this effect using magnetic shielding materials. Magnetic shielding materials can be made of magnetic materials (materials that can react to magnetic fields in a certain way are called magnetic materials), such as iron, copper, etc., which can absorb and weaken magnetic fields. They can also be made of non-magnetic materials, such as plastics, or a combination of both. Magnetic shielding materials do not completely block magnetic fields; their function is only to reduce the magnetic field strength, so that the magnetic field strength in the area where they block the magnetic field is insufficient to make the magnetic fluid visible.

[0038] A magnet 24 is disposed on the control layer 2. This magnet 24 itself can form at least one magnetic field pattern, and it can also include multiple magnetic units, which together form the magnetic field pattern, thus forming at least one magnetic field pattern. Generally, if the magnet is a permanent magnet, the corresponding pattern can be directly fabricated. Alternatively, the magnetic units in the control layer 2 can also be electromagnets. Each magnetic unit exhibits magnetism when energized, so multiple magnetic units can form a magnetic field pattern. Magnetic units in a non-energized state do not exhibit magnetism, therefore, non-energized magnetic units cannot form a magnetic field pattern. Therefore, based on the above background technology, if the capacity of the magnetic units can be switched between a conductive and an insulating state, the magnetic field pattern formed by all the magnetic units will change accordingly.

[0039] As can be seen from the above, the shape of magnet 24 directly affects the change of magnetic field pattern. Magnet 24 affects the shape of magnetic field pattern by having a magnetic field that is adapted to its own shape. Therefore, changing the magnetic field pattern is essentially changing the magnetic field of magnet 24. The above embodiment provides a way in which the shape of magnet 24 affects the magnetic field.

[0040] This invention also provides an embodiment in which the magnetic field pattern is affected by the magnetic field of the magnet 24. For example... Figure 2 As shown, in this embodiment, the control layer 2 further includes a shaping layer 22, on which a pattern capable of restricting the magnetic field of the magnetic layer and opening all or part of the magnetic field is formed. The shaping layer 22 can be a single-layer structure or a multi-layer structure.

[0041] When the limiting layer 22 is a single-layer structure, a first pattern that can open the magnetic field is provided on the limiting layer 22. The first pattern is not a specific graphic. The limiting layer 22 and the magnet 24 can move relative to each other to display more patterns. For example, the edge of the limiting layer 22 is provided with teeth, and the limiting layer 22 can be rotated by gears.

[0042] like Figure 2 As shown, when the limiting layer 22 has a multi-layer structure, the limiting layer 22 includes a first limiting member 221 and a second limiting member 222. A second pattern is provided on the second limiting member 222, and a third pattern is provided on the second limiting layer 22. The second and third patterns are respectively disposed on different horizontal planes to jointly limit the magnetic field of the magnetic layer and open all or part of the magnetic field. The second and third patterns do not refer to the second pattern alone, but rather to a set of multiple patterns disposed in more limiting layers 22. For example, the second pattern represents the superposition of two patterns, and the third pattern represents one pattern; or the second pattern represents one pattern, and the third pattern represents two patterns.

[0043] like Figure 1-4 As shown, in this magnetohydrodynamic morphology precision control device, a driver 21 is provided in the control layer 2. This driver 21 can drive the magnet 24 or the shaping layer 22 to move, thereby realizing the switching of the pattern of the magnet 24. Figure 1 As shown, cavity 1 is the watch face, the limiting area is the four digits of the digital clock, and the control layer can be a tracked rotating digital disk with magnets for numbers 0-9. Each digit of the magnet corresponds to one of the four limiting areas after rotation. When the time is displayed as 12:12, the rotating digital disk displays 12:12 in the corresponding limiting area. The limiting area has a magnetic field within the range of the 12:12 digits. The magnetic fields in other areas are blocked by the second zone and the side walls. Therefore, the magnetic fluid can gradually flow into the 12:12 position through the opening, thus accurately displaying the time, while the other magnetic fluids flow freely under the influence of gravity. When the user shakes the product, the force is greater than the attraction of the magnetic field, and the magnetic fluid is thrown out of the limiting area. When the user remains still, the magnetic fluid will stay in the limiting area under the influence of the magnetic field to display the time. This magnetic fluid movement process has a good visual effect and a stress-relieving effect, providing the user with a superior product experience.

[0044] For example, such as Figure 2 The limiting area of ​​the magnetic fluid accommodating cavity of the magnetic fluid phone case is set to the shape of a human figure image. The magnet of the control layer can be a whole magnet or set to the shape of the human figure image, so that the magnetic fluid phone case can accurately display the human figure image. The process of the magnetic fluid gradually appearing in this area can bring users a very good visual experience.

[0045] like Figure 3As shown, further, the first limiting member 221 and the second limiting member 222 are movable relative to each other. The side of the first limiting member 221 is provided with teeth, and the driver 21 is a gear structure. The driver 21 meshes with the first limiting member 221 to drive the first limiting member 221 to rotate. The magnetic field of the magnet 24 itself reaches the second limiting member 222 after being blocked by the first limiting member 221, and then reaches the magnetofluid layer after being blocked by the second limiting member 222, and finally displays a pattern on the magnetofluid layer. For example, the magnetic field pattern of the second limiting member 221 consists of a handsome face, a smiling face, and a crying face. The pattern on the second limiting member 222 restricts the display of one of the patterns, and the final pattern displayed on the magnetofluid layer is the intersection of the patterns on the first limiting member 221 and the second limiting member 222.

[0046] like Figure 4 As shown, the pattern of the limiting area of ​​the accommodating cavity is a pattern of an athlete dribbling a ball. After the first limiting member 221 blocks the excess basketball, the final magnetic fluid pattern presented in the accommodating cavity 1 is a pattern of an athlete dribbling a ball. If the first limiting member 221 is moved and the blocking basketball is replaced, the position of the basketball can be changed.

[0047] Furthermore, as can be seen from the above, the limiting layer 22 and the magnet 24 can move relative to each other. In this figure, the basketball pattern is the pattern in the limiting layer 22. When the limiting layer 22 moves along a preset trajectory, such as the trajectory of an athlete dribbling the ball, it is foreseeable that a scene of an athlete dribbling between the legs can appear in the magnetofluid layer.

[0048] It is foreseeable that when a sufficient number of magnetic field patterns are set on the magnet 24, and there is a certain correlation between adjacent magnetic field patterns, the switching of magnetic field patterns can exist in the form of animation.

[0049] Therefore, this embodiment also provides a magnetohydrodynamic (MHD) morphology precision control device. The control layer 2 of the MHD morphology precision control device includes a driver 21. The MHD morphology device realizes the function of changing a single magnetic field pattern and switching between multiple magnetic field patterns, and can be applied to more complex scenarios.

[0050] like Figure 1 As shown, the magnetohydrodynamic shape precision control device is equipped with four rotating belts 23, each of which is equipped with 10 magnetic field patterns. Each rotating belt 23 has a different driver 21 to control the pattern switching. The display equipped with the magnetic field shape precision control device can be used as a clock to check the time.

[0051] The above solution uses the actuator 21 to drive the magnet 24 to move, making the pattern in the magnetofluid exist in an animated form. This embodiment also provides a magnetofluid morphology precision control device, which uses the actuator 21 to drive the shape-limiting layer 22 to move, causing the pattern on the shape-limiting layer 22 to change, thereby realizing the change of the magnetic field pattern and achieving the animation of the pattern in the magnetofluid. Figure 4 As shown, the leftmost basic magnetic field pattern can also be just an athlete. The basketball, as a movable second magnetic field pattern, has corresponding limiting areas for the athlete and basketball trajectory within the limiting area. When the basketball magnetic field is moved, the athlete's dribbling animation can be realized.

[0052] The second aspect of this embodiment also provides a display device, including the magnetohydrodynamic morphology precision control device of any of the above-mentioned embodiments. It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably.

[0053] It should also be noted that, in this document, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations, nor should they be construed as indicating or implying relative importance. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements, but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. In the absence of further restrictions, an element defined by the phrase "includes a..." does not preclude the presence of other identical elements in the process, method, article, or terminal device that includes the element.

[0054] The technical solutions provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand this application, and the content of this specification should not be construed as a limitation of this application. Furthermore, for those skilled in the art, there will be different forms of changes in the specific implementation methods and application scope based on this application. It is neither necessary nor possible to exhaustively list all implementation methods here, and obvious changes or modifications derived therefrom are still within the protection scope of this application.

Claims

1. A magnetohydrodynamic (MHD) morphology precision control device, characterized in that, The device includes a accommodating cavity and a control layer. The accommodating cavity has a first surface near the control layer and a second surface away from the control layer. A limiting region is provided between the first surface and the second surface. The limiting region has at least one opening for the flow of magnetofluid. The magnetic field of the control layer passing through the first surface restricts the flow of magnetofluid within the limiting region. The control layer is provided with a magnet, which forms at least one magnetic field pattern; The control layer further includes a limiting layer, which is disposed between the magnet and the first surface of the accommodating cavity, and the limiting layer is provided with a pattern for selectively opening the magnetic field of the magnet; The control layer is also provided with a driver, which drives the limiting layer to move, so as to change the position of the pattern on the limiting layer relative to the magnet, thereby realizing the switching of the magnetofluid pattern in the limiting area; The limiting layer is a multi-layer structure. When the limiting layer is a multi-layer structure, the limiting layer is provided with a second pattern and a third pattern that can open the magnetic field. The second pattern and the third pattern are respectively set on different horizontal planes to jointly limit the magnetic field of the magnetic layer and open all or part of the magnetic field.

2. The magnetohydrodynamic morphology precise control device according to claim 1, characterized in that, The first surface includes a first region and a second region. The first region corresponds to the limiting region, and the second region restricts the magnetic field of the control layer so that the flow of the magnetofluid in the second region is not restricted.

3. The magnetohydrodynamic morphology precise control device according to claim 1, characterized in that, The sidewall of the limiting zone abuts against the first surface on one side and against the second surface on the other side. The opening is provided on the sidewall, and the sidewall restricts part or all of the magnetic field of the control layer from passing through.

4. The magnetohydrodynamic morphology precision control device according to claim 1, characterized in that, The magnet comprises a plurality of magnetic units, which together form at least one magnetic field pattern.

5. The magnetohydrodynamic morphology precision control device according to claim 1, characterized in that, When the limiting layer is a single-layer structure, the limiting layer and the magnet can move relative to each other; when the limiting layer is a multi-layer structure, the second pattern and the third pattern can move relative to each other.

6. The magnetohydrodynamic morphology precise control device according to claim 4, characterized in that, The magnet unit is an electromagnet.

7. A display device, characterized in that, The device includes the magnetohydrodynamic morphology precision control device according to any one of claims 1-6.

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