阅读说明：本技术 微胶囊及其制作方法、磁致变色器件、电子纸和电子设备 (Microcapsule and manufacturing method thereof, magnetic discoloration device, electronic paper and electronic equipment ) 是由 叶万俊 于 2021-09-09 设计创作，主要内容包括：本申请提供了微胶囊及其制作方法、磁致变色器件、电子纸和电子设备。该微胶囊包括囊壁,所述囊壁内设置有微胶囊颗粒和透光液体,所述囊壁构造成一锥体,且所述锥体的底面是透光的,所述微胶囊颗粒可在所述锥体的顶点和所述底面之间往复运动。该微胶囊可以通过微胶囊颗粒的往复运动显示不同的颜色,响应速度快,且该微胶囊的制作工艺简单、容易实现、成本较低。(The application provides a microcapsule, a manufacturing method thereof, a magnetic discoloration device, electronic paper and electronic equipment. The microcapsule comprises a capsule wall, wherein microcapsule particles and light-transmitting liquid are arranged in the capsule wall, the capsule wall is constructed into a cone, the bottom surface of the cone is light-transmitting, and the microcapsule particles can reciprocate between the vertex of the cone and the bottom surface. The microcapsule can display different colors through the reciprocating motion of microcapsule particles, has high response speed, and has simple manufacturing process, easy realization and lower cost.)

1. A microcapsule comprising a wall within which are disposed microcapsule particles and a light-transmissive liquid, the wall being configured as a cone and a base of the cone being light-transmissive, the microcapsule particles being reciprocable between the apex of the cone and the base.

2. A microcapsule according to claim 1, characterized in that said microcapsule particles are suspended in said light-transmissive liquid.

3. A microcapsule according to claim 2, wherein the microcapsule particles comprise at least one of charged particles or magnetic particles.

4. A microcapsule according to claim 2, wherein when said microcapsule particles comprise magnetic particles, said magnetic particles comprise:

a magnetic layer;

a color layer disposed on at least one surface of the magnetic layer.

5. A microcapsule according to claim 4, characterized in that said magnetic particles further comprise: an adhesive layer disposed between the magnetic layer and the color layer.

6. The microcapsule according to claim 5, wherein said color layer comprises a plurality of sub-color layers sequentially stacked, said plurality of sub-color layers comprising a first sub-color layer and a second sub-color layer, said first sub-color layer and said second sub-color layer being alternately disposed.

7. The microcapsule according to claim 6, wherein the material of the magnetic layer comprises nickel, the material of the adhesion layer comprises chromium, the material of the first sub-color layer comprises silicon dioxide, and the material of the second sub-color layer comprises titanium dioxide.

8. A microcapsule according to claim 1, characterized in that said cone is a cone.

9. A microcapsule according to claim 1, characterized in that the longest distance between any two points on said bottom surface is comprised between 10 μm and 1000 μm.

10. A microcapsule according to claim 1, characterized in that the color of the microcapsule particles is black and the color of the inner side of the cone is white.

11. A microcapsule according to claim 1, wherein the volume percentage of the microcapsule particles is comprised between 10% and 40% based on the total volume of the wall.

12. A microcapsule according to claim 1, characterized in that the viscosity of said light-transmissive liquid is between 1 and 50 mPa-s.

13. A method of making microcapsules, wherein the walls of the microcapsules are configured as a cone and the base of the cone is optically transparent, the method comprising:

and arranging microcapsule particles and light-transmitting liquid in the capsule wall, and enabling the microcapsule particles to reciprocate between the vertex of the cone and the bottom surface so as to obtain the microcapsule.

14. The method of claim 13, comprising:

forming the sides and the apex of the cone, the sides and the apex configured as a conical groove;

and forming the bottom surface so as to form the capsule wall, filling the capsule wall into the conical groove, and arranging microcapsule particles and light-transmitting liquid in the capsule wall.

15. The method of claim 14, wherein the step of forming the sides and the apex further comprises:

providing a first substrate;

and performing stamping processing on one surface of the first substrate.

16. The method of claim 14, wherein the step of forming the capsule wall comprises at least one of:

(1) subjecting the preformed particles to a surface modification treatment to charge the preformed particles to obtain the microcapsule particles;

(2) forming a magnetic film layer on a second substrate; peeling the magnetic film layer from the second substrate; and (3) crushing the magnetic film layer to obtain the microcapsule particles.

17. A magneto-chromic device, comprising:

a substrate provided with a magnetic field generating device to generate an external magnetic field;

the microcapsule electronic ink is positioned on one side of the base material, a plurality of microcapsules are arranged in the microcapsule electronic ink, each microcapsule comprises a capsule wall, microcapsule particles and light-transmitting liquid are arranged in the capsule wall, the capsule wall is constructed into a cone, the bottom surface of the cone is light-transmitting, and the microcapsule particles can reciprocate between the top point of the cone and the bottom surface;

wherein said microcapsule particles within a plurality of said microcapsules are concentrated toward the apex of said cone when said magnetic field generating means applies a magnetic field of a first direction;

when the magnetic field generating device applies a magnetic field in a second direction, the microcapsule particles in a plurality of microcapsules are gathered to the bottom surface of the cone, and the second direction is opposite to the first direction.

18. An electronic paper, comprising the microcapsule according to any one of claims 1 to 12 or the microcapsule produced according to any one of claims 13 to 16, wherein the wall of the microcapsule is formed into a cone.

19. The electronic paper of claim 18, further comprising a first substrate having a tapered recess on one surface, the tapered recess being configured by an apex and a side of the cone.

20. The electronic paper according to claim 18 or 19, wherein at least one of the following conditions is also satisfied such that microcapsule particles in the microcapsule are reciprocally movable between the apex and the bottom face of the cone:

the electric field generating component can enable the microcapsules to be placed in an electric field;

also included is a magnetic field generating component that can subject the microcapsules to a magnetic field.

21. An electronic device, comprising:

an electronic device case having an accommodating space therein; and

the electronic paper of any one of claims 18-20, wherein the electronic paper is disposed in the accommodating space, and a light emitting surface of the electronic paper faces a side away from the electronic device housing.

22. An electronic device, comprising:

an electronic device case having an accommodating space therein, the electronic device case including:

a light-transmitting cover plate;

the electronic paper of any one of claims 18-20, disposed on an inner surface of the light-transmissive cover sheet; and

the display screen is arranged in the accommodating space, and the light emitting surface of the display screen faces to one side far away from the electronic equipment shell.

Technical Field

The application relates to the technical field of electronic equipment, in particular to a microcapsule, a manufacturing method thereof, a magnetic discoloration device, electronic paper and electronic equipment.

Background

The electronic paper is an ultrathin, flexible and erasable display device, compared with other display devices such as an LCD (liquid crystal display) device and an OLED (organic light emitting diode), the electronic paper realizes display by reflecting ambient light, visual fatigue caused by a strong backlight source is avoided, and the reading of the electronic paper display device is similar to that of a paper printed matter, so that eyes can be protected, and the electronic paper display device is comfortable and environment-friendly. Therefore, electronic paper has been favored by more and more consumers in recent years. However, in the conventional electronic paper, in the electrophoresis system, the movement speed of the electrophoretic particles is slow, so that the response time is slow.

Thus, the related art of electronic paper is still to be improved.

Disclosure of Invention

In one aspect of the present application, a microcapsule is provided. The microcapsule comprises a capsule wall, wherein microcapsule particles and light-transmitting liquid are arranged in the capsule wall, the capsule wall is constructed into a cone, the bottom surface of the cone is light-transmitting, and the microcapsule particles can reciprocate between the vertex of the cone and the bottom surface. Therefore, the microcapsule can display different colors through the reciprocating motion of the microcapsule particles, the response speed is high, and the preparation process of the microcapsule is simple, easy to realize and low in cost.

In another aspect of the present application, a method of making a microcapsule is provided. The wall of the microcapsule is configured as a cone, and the bottom surface of the cone is light-transmitting, the method comprising: the microcapsule wall is internally provided with microcapsule particles and light-transmitting liquid, and the microcapsule particles can reciprocate between the vertex of the cone and the bottom surface so as to obtain the microcapsule.

In yet another aspect of the present application, a method of making a magnetic device is provided. The magneto-chromic device includes: a substrate provided with a magnetic field generating device to generate an external magnetic field; the microcapsule electronic ink is positioned on one side of the base material, a plurality of microcapsules are arranged in the microcapsule electronic ink, each microcapsule comprises a capsule wall, microcapsule particles and light-transmitting liquid are arranged in the capsule wall, the capsule wall is constructed into a cone, the bottom surface of the cone is light-transmitting, and the microcapsule particles can reciprocate between the top point of the cone and the bottom surface; wherein said microcapsule particles within a plurality of said microcapsules are concentrated toward the apex of said cone when said magnetic field generating means applies a magnetic field of a first direction; when the magnetic field generating device applies a magnetic field in a second direction, the microcapsule particles in a plurality of microcapsules are gathered to the bottom surface of the cone, and the second direction is opposite to the first direction. Therefore, the magnetic variable color device controls the moving direction of the microcapsule particles through the magnetic field generating device to enable the microcapsule particles to display different colors, and has all the characteristics and advantages of the microcapsules, and redundant description is omitted.

In yet another aspect of the present application, the present application provides an electronic paper. The electronic paper comprises the microcapsules or the microcapsules prepared by the method, and the wall of each microcapsule is a cone, so that the electronic paper can change the display color through the microcapsules, and the electronic paper has the advantages of simple preparation process, easiness in realization, lower cost, high production efficiency, easiness in industrialization, high response speed, all the characteristics and advantages of the microcapsules, and no redundant description is provided.

In yet another aspect of the present application, an electronic device is provided. The electronic equipment comprises an electronic equipment shell, wherein the electronic equipment shell is provided with an accommodating space; and the electronic paper is arranged in the accommodating space, and the light emergent surface of the electronic paper faces to one side far away from the electronic equipment shell. Therefore, the electronic device has the electronic paper capable of protecting eyes, the damage of the electronic device to the eyes is reduced, the electronic device can display different colors through the microcapsules, and all the characteristics and advantages of the electronic paper are provided, and redundant description is omitted.

In yet another aspect of the present application, an electronic device is provided. The electronic equipment comprises an electronic equipment shell, a light-transmitting cover plate and a light-transmitting cover plate, wherein the electronic equipment shell is provided with an accommodating space; the electronic paper is arranged on the inner surface of the light-transmitting cover plate; and the display screen is arranged in the accommodating space, and the light emergent surface of the display screen faces to one side far away from the electronic equipment shell. Therefore, the electronic device has the electronic paper capable of protecting eyes, the damage of the electronic device to the eyes is reduced, the electronic device can display different colors through the microcapsules, and all the characteristics and advantages of the electronic paper are provided, and redundant description is omitted.

Drawings

Fig. 1a, 1b show schematic diagrams of electrophoretic microcapsule technology of the prior art.

Fig. 2a and 2b show schematic diagrams of the electrophoresis microcup technology of the prior art.

Fig. 3 shows a schematic plan view of an exemplary microcapsule structure of the present application.

Fig. 4 shows a top view of the structure of an exemplary microcapsule of the present application.

Fig. 5 shows a schematic plan view of an exemplary magnetic particle of the present application.

Fig. 6 shows a schematic plan view of a magnetic particle according to another example of the present application.

Fig. 7 shows a schematic plan view of a magnetic particle according to yet another example of the present application.

Fig. 8a, 8b, 8c, 8d show schematic diagrams of the principle that microcapsules of some embodiments of the present application show different colors.

Fig. 9a, 9b, 9c, 9d show schematic diagrams of the principle that microcapsules of some embodiments of the present application show different colors.

Fig. 10 shows a schematic flow diagram of an exemplary method of making microcapsules of the present application.

FIG. 11 shows a schematic flow chart of the steps of forming the sides and vertices of an example of the present application.

Fig. 12a, 12b, 12c show schematic diagrams of the steps of obtaining microcapsule particles according to an example of the present application.

Fig. 13 shows a schematic plan view of a magneto-chromic device according to an example of the present application.

Fig. 14 shows a schematic structural diagram of an electronic device according to an example of the present application.

Reference numerals:

10: microcapsule 100: the capsule wall 110: microcapsule particle 120: the light-transmitting liquid 210: bottom surface 220: vertex 410: second substrate 420: magnetic powder 510: magnetic layer 520: color layer 530: adhesive layer 521: first sub-color layer 522: second sub-color layer 600: substrate 610: magnetic field generating device 620: microcapsule electronic ink 1000: electronic equipment shell

Detailed Description

The present application was completed based on the following findings of the inventors:

the existing technologies for manufacturing electronic paper include electrophoretic microcapsule technology, electrophoretic microcup technology, electrophoretic electronic powder flow technology, cholesterol liquid crystal technology, micro electro mechanical system technology, electrowetting technology, and the like, and the electrophoretic microcapsule technology and the electrophoretic microcup technology are the most used methods for manufacturing electronic paper at present.

The electrophoretic microcapsule technology is a set of microcapsules, each microcapsule particle is internally packaged with white titanium oxide particles with positive charges, black carbon particles with negative charges and electrophoretic liquid, when the upper layer of ITO is introduced with positive charges and the lower layer of ITO is introduced with negative charges or the upper layer of ITO is not conductive and the lower layer of ITO is introduced with stronger negative charges, the carbon particles in the microcapsules are gathered to the upper layer, the titanium oxide particles are gathered downwards, and the color displayed on the front surface of a powered area is black, as shown in FIG. 1 a; when the upper layer ITO is introduced with negative electricity and the lower layer ITO is introduced with positive electricity or the upper layer ITO is not conducted and the lower layer ITO is introduced with stronger positive electricity, carbon particles in the microcapsule are gathered towards the lower layer, titanium oxide particles are gathered upwards, and the color displayed on the front surface of the electrified area is white, as shown in fig. 1b, and under the condition of different voltages or different electrified time, the gray scale of the front surface color can also have difference, and the colors with different gray scales can be obtained by controlling different voltages or different electrified time.

The electrophoretic microcup technology works on a similar principle to the electrophoretic microcapsule technology, and the electrophoretic microcup technology also displays different colors by controlling particles of different colors to move upwards by applying an electric field. Typically, three-color or color electronic inks are based on electrophoretic microcup technology, wherein the structure of the three-color and color microcup electronic inks is shown in fig. 2a and 2 b.

The microcapsule electronic ink in the electrophoresis microcapsule technology and the electrophoresis microcup technology needs to adopt black particles and white particles, and the two particles need to be subjected to surface treatment to be charged, so that the process is complex and the cost is high.

In addition, in the electrophoresis microcapsule technology, only black particles can be charged in the microcapsule, white particles are in a neutral state, and the black particles are controlled to move by an external electric field, so that black and white color change is realized. Since only the black particles are charged, only the black particles need to be charged, and thus the cost is relatively low, however, the white particles inside the microcapsule may obstruct the movement of the black particles, so that the response speed thereof becomes slow.

Based on this, the present application aims to solve at least one of the technical problems in the related art to some extent.

To this end, in one aspect of the present application, a microcapsule is provided. Referring to fig. 3 and 4, the microcapsule 10 includes a wall 100, the microcapsule particles 110 and the light-transmissive liquid 120 are disposed in the wall 100, the wall 100 is configured as a cone, and the bottom surface 210 of the cone is light-transmissive, and the microcapsule particles 110 can reciprocate between the vertex 220 of the cone and the bottom surface 210. Because the microcapsule particles can reciprocate between the top point and the bottom surface of the cone, the microcapsule can display different colors through the reciprocating motion of the microcapsule particles, when the microcapsule particles integrally move to the position of the top point, the color displayed by the whole cone is the color of the inner side surface of the cone, and a small point with different colors is arranged in the cone, the color displayed by the small point is the color of the microcapsule particles, but the small point is small and can not be observed by naked eyes, so the color displayed by the cone on the whole is the color of the inner side surface of the cone; when the microcapsule particles move to the position of the bottom surface integrally, the color displayed by the cone is the color of the microcapsule particles, so that the conversion of different colors of the microcapsule can be realized only by using the microcapsule particles with one color.

It will be appreciated that the microcapsule particles are suspended in the light-transmissive liquid, thereby enabling the microcapsule particles to move to and fro between the apex and the base of the cone with a reduced distance of movement and hence a reduced response time.

It is to be understood that the microcapsule particles may include at least one of charged particles or magnetic particles. Specifically, the microcapsule particles may include only the charged particles, only the magnetic particles, or both the charged particles and the magnetic particles. When the microcapsule particles include only the charged particles, the microcapsule particles may be reciprocated by applying a voltage to a planar region where the apex or the bottom surface of the cone is located; when the microcapsule particles include only magnetic particles, the microcapsule particles may be reciprocated by applying a magnetic field to a planar region where the apex or the bottom surface of the cone is located; when the microcapsule particles comprise both charged particles and magnetic particles, the microcapsule particles can be reciprocated by applying a voltage and a magnetic field to a planar area where the vertex or the bottom of the cone is located, so that the different colors of the microcapsule can be better converted.

It is understood that, referring to fig. 5, when the microcapsule particles include magnetic particles, the magnetic particles include: a magnetic layer 510; a color layer 520, wherein the color layer 520 is disposed on at least one surface of the magnetic layer 510 (the color layer is disposed on two opposite surfaces of the magnetic layer is shown in the figure), thereby making the microcapsule particles have certain magnetism, making the microcapsule particles move under the driving of the magnetic field, and making the microcapsule particles have corresponding colors.

It is understood that, with reference to fig. 6, the magnetic particles further comprise: an adhesive layer 530, wherein the adhesive layer 530 is disposed between the magnetic layer 510 and the color layer 520 (the figure shows that when the color layers are disposed on two opposite surfaces of the magnetic layer, the adhesive layer is disposed between the magnetic layer and the color layer), thereby better improving the adhesion between the magnetic layer and the color layer.

It can be understood that, referring to fig. 7, the color layer 520 includes a plurality of sub-color layers sequentially stacked, the sub-color layers include a first sub-color layer 521 and a second sub-color layer 522, and the first sub-color layer 521 and the second sub-color layer 522 are alternately disposed, thereby making the color displayed by the microcapsule particles more uniform.

It can be understood that the material of the magnetic layer, the material of the adhesion layer, and the material of the color layer are not particularly limited, for example, the material of the magnetic layer may include nickel, the material of the adhesion layer may include chromium, the material of the first sub-color layer in the color layer may include silicon dioxide, and the material of the second sub-color layer in the color layer may include titanium dioxide, which is not described in detail herein.

It will be appreciated that the colour of the microcapsule particles may be black and the colour of the inner side of the cone may be white, whereby the microcapsules are capable of a black-and-white colour transition as the microcapsule particles reciprocate between the apex and base of the cone.

It is understood that the material of the microcapsule particle is not particularly limited, and may be, for example, copper oxide, carbon black, iron black or copper chromium black, and carbon black is preferred, so that the color of the microcapsule particle is black, so that the microcapsule can better realize the black-white color conversion when the microcapsule particle reciprocates.

Specifically, the principle of the microcapsule for realizing black-white color conversion is as follows: when the microcapsule particles are charged particles, the transparent liquid can be selected from electrophoretic liquid, referring to fig. 8a, when negative charges are applied to the direction of the plane area of the bottom surface 210 of the cone, and positive charges are applied to the direction of the plane area of the vertex 220 of the cone, due to the electrostatic attraction effect, the whole microcapsule particles 110 move and gather to the position of the vertex 220, referring to fig. 8b, the cone displays white, and a small black dot is arranged in the cone, but the small black dot cannot be observed by naked eyes, so the whole cone displays white; referring to fig. 8c, when a positive charge is applied to the planar area of the bottom surface 210 of the cone and a negative charge is applied to the planar area of the apex 220 of the cone, the entire microcapsule particle 110 moves to the position of the bottom surface 210 due to the electrostatic attraction, and the lubrication degree between the microcapsule particles is high due to the surface treatment of the surface of the microcapsule particle, so that the microcapsule particle can spread out on the bottom surface area, and at this time, referring to fig. 8d, the cone displays black. Thereby, the microcapsules achieve a black-and-white color transition.

It is understood that the electrophoretic fluid is generally composed of a solvent, a stabilizer, a charge control agent and the like, wherein the solvent may be tetrafluoroethylene, the stabilizer may be Span80, and the charge control agent may be polyisobutylene succinimide and the like.

When the microcapsule particles are magnetic particles, the transparent liquid 120 needs to be a transparent liquid with a certain viscosity, referring to fig. 9a, when a magnetic field is applied in the direction of the plane area of the bottom surface 210 of the cone, the whole microcapsule particles 110 move and gather to the position of the vertex 220 of the cone due to the action of the magnetic field, referring to fig. 9b, the cone displays white, and a small black dot is arranged in the cone, but the small black dot is small and cannot be observed by naked eyes, so the whole cone displays white; referring to fig. 9a, when a magnetic field is applied in the direction of the planar area of the bottom surface 210 of the cone, the entire microcapsule particles 110 move to the position of the bottom surface 210 of the cone due to the magnetic field, and the lubrication degree between the microcapsule particles is high due to the surface treatment of the surfaces of the microcapsule particles, so that the microcapsule particles can spread out in the area of the bottom surface, and referring to fig. 9d, the cone shows black. Thereby, the microcapsules achieve a black-and-white color transition.

It will be appreciated that the cone may be conical, whereby the apex of the cone is smaller, and as the microcapsule particles aggregate as a whole moving towards the location of the apex of the cone, the microcapsule particles are better clustered together, so that the cone displays a white colour, with a small black dot inside, which cannot be observed by the naked eye, and thus the cone displays a white colour better.

It is understood that the longest distance between any two points on the bottom surface may be 10 μm to 1000 μm, and when the microcapsule particles move to the position of the bottom surface of the cone as a whole, the microcapsule particles can better spread out on the area of the bottom surface due to the longer distance of the bottom surface of the cone, so that the cone as a whole can better display black spots.

It can be understood that, based on the total volume of the capsule wall, the volume percentage of the microcapsule particles may be 10% to 40%, and when the volume percentage of the microcapsule particles is too small, the microcapsule particles spread out when moving to the position of the bottom surface, the area of the bottom surface cannot be completely filled, so that the color displayed by the cone cannot completely display black, which affects the display effect of the microcapsule; when the volume percentage content of the microcapsule particles is too large, the microcapsule particles are all gathered at the top point when moving to the position where the top point is located, so that the black point displayed at the top point is large, the color displayed by the cone is a large black point inside the white, the black point can be seen by naked eyes when being too large, the whole cone can not completely display the white, the display effect of the microcapsule is influenced, when the volume percentage content of the microcapsule particles is in the range, the conversion of different colors in the microcapsule can be better realized, and the display effect of the microcapsule is better.

It is understood that the viscosity of the light-transmitting liquid may be 1mPa · s to 50mPa · s, and when the viscosity of the light-transmitting liquid is too small, the microcapsule particles cannot exist stably in the light-transmitting liquid and easily settle downward. When the viscosity of the transparent liquid is too high, the microcapsule particles need to overcome larger resistance when reciprocating between the top point and the bottom surface of the cone, so that the motion time of the microcapsule particles is prolonged, the response speed is slowed, and when the viscosity of the transparent liquid is in the range, the microcapsule particles can better reciprocate between the top point and the bottom surface of the cone, so that the response speed of the microcapsule is higher, and the display effect is better.

It is understood that the material of the light-transmitting liquid is not particularly limited, and may be, for example, an organic solvent, such as varnish, oil, etc., which is not described in detail herein.

In another aspect of the present application, a method of making a microcapsule is provided. The wall of the microcapsule is configured as a cone, and the bottom surface of the cone is light-transmitting, the method comprising: the microcapsule wall is internally provided with microcapsule particles and light-transmitting liquid, and the microcapsule particles can reciprocate between the vertex of the cone and the bottom surface so as to obtain the microcapsule.

It is understood that, with reference to fig. 10, the method may further include:

s100: forming the sides and the apex of the cone, the sides and the apex configured as a conical groove;

in some embodiments of the present application, referring to fig. 11, the step of forming the side and the vertex may further comprise:

s110: providing a first substrate;

it is to be understood that the process, parameters, and the like for providing the first substrate are not particularly limited, and those skilled in the art can flexibly select the process, parameters, and the like according to actual needs, and therefore, redundant description is not repeated herein.

S120: and performing stamping processing on one surface of the first substrate.

It should be understood that the process and parameters of the stamping process are not particularly limited as long as the side and the vertex of the cone can be formed, and those skilled in the art can flexibly select the process and parameters according to actual needs, and will not be described in detail herein.

S200: and forming the bottom surface so as to form the capsule wall, filling the capsule wall into the conical groove, and arranging microcapsule particles and light-transmitting liquid in the capsule wall.

Further, the step of forming the capsule wall may comprise at least one of:

(1) subjecting the preformed particles to a surface modification treatment to charge the preformed particles to obtain the microcapsule particles;

in some embodiments of the present application, the method for treating the surface of the preformed particle is not particularly limited, and may be a physical method such as spraying, melting, dispersing, and condensing method, or a chemical method such as adsorption, graft polymerization, and emulsion polymerization, which will not be described in detail herein.

(2) Forming a magnetic film layer on a second substrate; peeling the magnetic film layer from the second substrate; and (3) crushing the magnetic film layer to obtain the microcapsule particles.

In still other embodiments of the present application, the method for obtaining the microcapsule particle is based on an evaporation coating technology, and specifically, the step of obtaining the microcapsule particle comprises: referring to fig. 12a, a color layer, an adhesion layer 530, a magnetic layer 510, an adhesion layer 530, and a color layer forming magnetic film layer may be sequentially evaporated on a second substrate 410 (it is understood that the magnetic film layer is formed when the color layer is disposed on the surface opposite to the magnetic layer in the magnetic particle, and when the color layer is disposed on one surface of the magnetic layer in the magnetic particle, the magnetic film layer may be formed only by sequentially evaporating the color layer, the adhesion layer, and the magnetic layer on the second substrate), wherein the step of evaporating the color layer includes alternately evaporating a first color layer 521 and a second color layer 522; after the coating is completed, referring to fig. 12b, the magnetic film layer is completely peeled off from the second substrate 410; referring to fig. 12c, the magnetic film layer is then pulverized to obtain magnetic powder 420 with uniform particle size, and finally microcapsule particles are obtained.

It is understood that the material of the second substrate is not particularly limited, and may be, for example, a glass substrate, which is not described herein in detail.

It is to be understood that the process of the pulverization treatment is not particularly limited, and may be, for example, a jet pulverization process, which will not be described in detail herein. Therefore, the method is simple and convenient to operate, easy to realize and easy for industrial production.

It will be appreciated that the process of forming the base surface to form the wall may be conventional and will not be described in any greater detail herein. Therefore, the method is simple and convenient to operate, easy to realize and easy for industrial production.

In yet another aspect of the present application, a method of making a magnetic device is provided. Referring to fig. 13, the magneto-chromic device includes: a substrate 600, the substrate 600 providing a magnetic field generating device 610 to generate an external magnetic field; a microcapsule electronic ink 620, the microcapsule electronic ink 620 being located on one side of the substrate 600, a plurality of microcapsules 10 being disposed in the microcapsule electronic ink 620 (it should be noted that, in the drawings herein, only four microcapsules 10 are illustrated in the microcapsule electronic ink 620, it should be understood by those skilled in the art that there are a plurality of other microcapsules not illustrated in the microcapsule electronic ink 620 of the present invention besides the four microcapsules illustrated in the drawings), referring to fig. 3, the microcapsules 10 include a capsule wall 100, microcapsule particles 110 and a light-transmitting liquid 120 being disposed in the capsule wall 100, the capsule wall 100 is configured as a cone, and the bottom surface 210 of the cone is light-transmitting, and the microcapsule particles can reciprocate between the vertex 220 of the cone and the bottom surface 210; wherein said microcapsule particles 110 in a plurality of said microcapsules 10 are gathered towards the apex 220 of said cone when said magnetic field generating means 610 applies a magnetic field of a first direction; when the magnetic field generating device 610 applies a magnetic field in a second direction, the microcapsule particles 110 in the plurality of microcapsules 10 are gathered toward the bottom surface 210 of the cone, and the second direction is opposite to the first direction. Therefore, the magnetic variable color device controls the moving direction of the microcapsule particles through the magnetic field generating device to enable the microcapsule particles to display different colors, and has all the characteristics and advantages of the microcapsules, and redundant description is omitted.

In yet another aspect of the present application, the present application provides an electronic paper. The electronic paper comprises the microcapsules or the microcapsules prepared by the method, and the wall of each microcapsule is a cone, so that the electronic paper can change the display color through the microcapsules, and the electronic paper has the advantages of simple preparation process, easiness in realization, lower cost, high production efficiency, easiness in industrialization, high response speed, all the characteristics and advantages of the microcapsules, and no redundant description is provided.

Further, the electronic paper may further include a first substrate having a tapered groove on one surface thereof, the tapered groove being configured by the apex and the side of the cone, whereby the microcapsule may be better disposed in the electronic paper, so that the electronic paper may better achieve a change in display color by the microcapsule.

It is understood that the electronic paper may include an electric field generating component that may subject the microcapsules to an electric field such that microcapsule particles in the microcapsules may reciprocate between the apex and the bottom surface of the cone; a magnetic field generating component can also be included, wherein the magnetic field generating component can enable the microcapsule to be placed in a magnetic field, so that microcapsule particles in the microcapsule can reciprocate between the top point and the bottom surface of the cone; or both, so that the microcapsule particles in the microcapsules can better reciprocate between the apex and the base of the cone.

It will be appreciated that the electronic paper may include the structure and components of conventional electronic paper, such as an electronic pen, etc., in addition to the microcapsules, the first substrate, and the generating assembly described above, and will not be described in any greater detail herein.

In yet another aspect of the present application, an electronic device is provided. Referring to fig. 14, the electronic device includes an electronic device case 1000 having an accommodating space (not shown in the drawings) therein; and the electronic paper is arranged in the accommodating space, and the light emergent surface of the electronic paper faces to one side far away from the electronic equipment shell. Therefore, the electronic device has the electronic paper capable of protecting eyes, the damage of the electronic device to the eyes is reduced, the electronic device can display different colors through the microcapsules, and all the characteristics and advantages of the electronic paper are provided, and redundant description is omitted.

In yet another aspect of the present application, an electronic device is provided. The electronic equipment comprises an electronic equipment shell, a light-transmitting cover plate and a light-transmitting cover plate, wherein the electronic equipment shell is provided with an accommodating space; the electronic paper is arranged on the inner surface of the light-transmitting cover plate; and the display screen is arranged in the accommodating space, and the light emergent surface of the display screen faces to one side far away from the electronic equipment shell. Therefore, the electronic device has the electronic paper capable of protecting eyes, the damage of the electronic device to the eyes is reduced, the electronic device can display different colors through the microcapsules, and all the characteristics and advantages of the electronic paper are provided, and redundant description is omitted.

In some examples of the present application, the specific category of the electronic device may be a mobile phone or a smart phone, a portable game device, a laptop computer, a personal digital assistant, a portable internet device, a music player, a data storage device, other handheld devices, a watch, or any other category of electronic devices, which will not be described in detail herein. Therefore, the application range is wide.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.