CN111381413A - Microcapsule, electronic ink screen, display method and display device - Google Patents
Microcapsule, electronic ink screen, display method and display device Download PDFInfo
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- CN111381413A CN111381413A CN202010176694.XA CN202010176694A CN111381413A CN 111381413 A CN111381413 A CN 111381413A CN 202010176694 A CN202010176694 A CN 202010176694A CN 111381413 A CN111381413 A CN 111381413A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1675—Constructional details
- G02F1/16757—Microcapsules
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/1673—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by magnetophoresis
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/165—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on translational movement of particles in a fluid under the influence of an applied field
- G02F1/1685—Operation of cells; Circuit arrangements affecting the entire cell
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- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
The application discloses a microcapsule, electronic ink, an electronic ink screen, a display method and a display device. The electronic ink comprises a solvent and a plurality of microcapsules dispersed in the solvent, the microcapsules comprise a capsule shell layer, the capsule shell layer defines a capsule accommodating cavity, a first end of the capsule accommodating cavity is filled with a first filler, a second end, far away from the first end, of the capsule accommodating cavity is filled with a second filler, the first filler has magnetism, the second filler has no magnetism or is weaker than the first filler, the second filler is made of a photoluminescent material, and the capsule shell layer is light-permeable; under the same illumination, the first filler does not emit light, and the second filler emits light; alternatively, the first filler and the second filler emit different colors of light under the same illumination. The microcapsule of this application can change its display effect towards specific direction through applying the magnetic field of equidirectional not, and the demonstration colour of electronic ink can be customized as required, can realize through the second filler of reasonable selection in the microcapsule.
Description
Technical Field
The application relates to the technical field of display, in particular to a microcapsule, electronic ink, an electronic ink screen, a display method and a display device.
Background
The electronic ink screen is a screen using electronic ink, and this technology is also called electronic paper display technology. The electronic ink screen has a wide application range, which is as large as the commercialized electronic book and as small as the electronic price tag. The electronic price tags are also called electronic shelf tags, are electronic display devices with information receiving and sending functions, are connected with a computer database of a shopping mall through a wired or wireless network, display the latest commodity information through a display screen on the electronic price tags, and have the advantages of being simple in operation, easy to read and saving paper and human resources.
The electronic ink screen widely used at the present stage is mainly a black-and-white display screen, and the realization of colorization of the electronic ink screen is the development direction of the electronic ink screen.
Content of application
An object of the present application is to provide a microcapsule useful for display and an electronic ink including the same.
Another object of the present application is to provide an electronic ink panel that can be used for partial color display or full color display, and a display device including the electronic ink panel.
According to one aspect of the present application, there is provided a microcapsule comprising a capsule shell defining a capsule receiving cavity, a first end of the capsule receiving cavity being filled with a first filler, a second end of the capsule receiving cavity remote from the first end being filled with a second filler, the first filler having magnetic properties, the second filler having no or weaker magnetic properties than the first filler, the second filler being made of a photoluminescent material, the capsule shell being light permeable;
under the irradiation of exciting light, the first filler does not emit light, and the second filler emits light;
or, under the irradiation of the exciting light, the first filler and the second filler emit light with different colors.
Further, the microcapsule has a particle size of 50 to 500 μm, the particles in the first filler have a particle size of 100 to 1 μm, and the particles in the second filler have a particle size of 1 to 100 nm.
Further, the material of the first filler is a ferromagnetic material or a ferrimagnetic material.
Further, the material of the second filler is a quantum dot material.
Further, a barrier layer is disposed between the first end and the second end of the capsule receiving cavity, the barrier layer separating the first end from the second end.
According to another aspect of the present application, there is provided an electronic ink comprising a solvent and a plurality of microcapsules dispersed in the solvent, the microcapsules as described herein before.
According to another aspect of the present application, there is provided an electronic ink screen, comprising a plurality of display units, each of the display units comprises at least one ink accommodating chamber, the display side of each of the ink accommodating chambers is transparent, the ink accommodating chambers are filled with the electronic ink described above, the display units further comprise a first magnetic field generating device and a second magnetic field generating device, the first magnetic field generating device controllably generates a first magnetic field on the display side of the display unit, so that the first end of the microcapsule contained in the display unit is turned to the display side under the action of the first magnetic field, the second end is away from the display side, the second magnetic field generating device controllably generates a second magnetic field on the other side of the display unit away from the display side, so that the first end of the microcapsule contained in the display unit is away from the display side under the action of the second magnetic field, the second end turns to the display side.
Furthermore, each display unit is arranged in an array, each ink accommodating cavity in each display unit is arranged in an array, and light does not penetrate between the display units.
Further, the inner wall of the ink containing cavity comprises a top wall, a bottom wall and side walls surrounding the top wall, the top wall is light-transmitting, the side walls are light-tight, the first magnetic field generating device is arranged above the top wall, the area, opposite to the top wall, of the first magnetic field generating device is light-transmitting, and the second magnetic field generating device is arranged below the bottom wall.
According to another aspect of the present application, there is provided a display method including the steps of:
providing an electronic ink screen, wherein the electronic ink screen is provided with a plurality of display units, each display unit comprises at least one ink accommodating cavity, the display side of each ink accommodating cavity is transparent, and each ink accommodating cavity is filled with the electronic ink;
generating a first magnetic field at a display side of the display unit where display is not required, the first magnetic field causing the first end of the microcapsule contained in the display unit to face the display side and the second end to be away from the display side;
generating a second magnetic field at the other side of the display unit to be displayed away from the display side, the second magnetic field causing the first ends of the microcapsules contained in the display unit to be away from the display side and the second ends to be toward the display side;
incident light is irradiated from the display side into each of the ink containing chambers, the second filler in the second end toward the display side emits light under excitation of the incident light, and the first filler in the first end toward the display side emits no light or light of a color different from that of the second filler.
According to another aspect of the present application, a display device is provided, which includes the electronic ink screen and a control system, wherein the control system is electrically connected to the first magnetic field generating device and the second magnetic field generating device of each display unit, and is used for controlling the generation of the first magnetic field and the second magnetic field.
Further, the display device is applied to an electronic price tag, and the display device further comprises an excitation light source, and the excitation light source is used for exciting the electronic ink of the electronic ink screen to emit light.
Compared with the prior art, the beneficial effect of this application lies in:
(1) the microcapsule of the application can change the display effect towards a specific direction by applying magnetic fields in different directions, and the microcapsule can be used for displaying;
(2) the electronic ink disperses the microcapsules in the solvent, so that the microcapsules can freely rotate in the solvent under the action of a magnetic field, and the directional arrangement of the microcapsules can be better realized;
(3) the display color of the electronic ink screen can be customized as required by reasonably selecting the second filler in the microcapsule.
Drawings
FIG. 1 is a schematic representation of one embodiment of a microcapsule of the present application;
FIG. 2 is a schematic representation of another embodiment of a microcapsule of the present application;
FIG. 3 is a schematic view of one embodiment of electronic ink of the present application;
FIG. 4 is a partial schematic view of one embodiment of an electronic ink screen of the present application;
FIG. 5 is a schematic diagram of an embodiment of a display unit of the electronic ink screen of the present application, showing a state in which a second magnetic field is generated by a second magnetic field generating device;
FIG. 6 is a schematic longitudinal cross-sectional view of a portion of an electronic ink screen of the present application, showing a state in which each of the first magnetic field generating devices and each of the second magnetic field generating devices are not turned on;
FIG. 7 is a schematic longitudinal cross-sectional view of a portion of an electronic ink screen of the present application, wherein the second magnetic field generating device of the ink containing chamber to be displayed generates a second magnetic field and the first magnetic field generating device of the ink containing chamber not to be displayed generates a first magnetic field;
FIG. 8 illustrates an application scenario of the display device of the present application;
in the figure:
1. microcapsules; 11. a capsule shell layer; 110. a capsule housing chamber; 111. a first end; 112. a second end; 12. a first filler; 13. a second filler; 14. a barrier layer;
2. a solvent;
3. an electronic ink screen; 300(300a/300b), a display unit; 30(30a/30b), an ink containing chamber; 301. a top wall; 302. a bottom surface; 303. a side wall; 31. a first magnetic field generating device; 32. a second magnetic field generating device; 33. a base plate; 34. a pixel defining layer; 35. a substrate.
4. A display device; 41. an excitation light source;
5. and (7) a shelf.
Detailed Description
The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
In the description of the present application, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., it indicates that the orientation and positional relationship shown in the drawings are based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be construed as limiting the specific scope of protection of the present application.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present application provides a microcapsule 1, as shown in fig. 1, comprising a capsule shell 11, the capsule shell 11 defining a capsule accommodating cavity 110, a first end 111 of the capsule accommodating cavity 110 being filled with a first filler 12, and a second end 112 of the capsule accommodating cavity 110, which is far away from the first end 111, being filled with a second filler 13.
The first filler 12 has magnetism, and the second filler 13 has no magnetism or has magnetism weaker than that of the first filler 12, so that when the microcapsule 1 is in a magnetic field, the first end 111 of the microcapsule 1 is subjected to a larger force of the magnetic field than the second end 112, so that the first end 111 of the microcapsule 1 tends to turn to the direction of the magnetic field and moves in the direction of the magnetic field.
The material of the second filler 13 is a photoluminescent material. The capsule shell 11 is light-permeable so as to allow light to pass through the capsule shell 11 to irradiate the second filler 13 and also allow light emitted from the second filler 13 to pass through the capsule shell 11.
Under the irradiation of the excitation light, the first filler 12 does not emit light, the second filler 13 emits light, or the first filler 12 and the second filler 13 emit light with different colors, and the material of the first filler 13 may be a photoluminescent material or not. When the excitation light irradiates the first end 111 and the second end 112 of the microcapsule 1, respectively, the display effect of the first end 111 and the second end 112 are different.
It is understood that the first filler 12 includes one or more magnetic materials and the second filler 13 includes one or more photoluminescent materials, which are not limited in this application.
The microcapsule 1 provided by the present application can realize directional arrangement under the action of an external magnetic field, so that the first end 111 and the second end 112 of the microcapsule 1 face a specific direction; further, the two ends of the microcapsule 1 respond differently to the excitation light, and therefore in the present application, the display effect of the microcapsule 1 in a specific direction can be changed by applying different magnetic fields.
In some embodiments, the particle size of the microcapsule 1 is 50 μm to 500 μm.
In some embodiments, the particles in the first filler 12 have a particle size of 100nm to 1 μm.
In some embodiments, the particles in the second filler 13 have a particle size of 1nm to 100 nm.
In some embodiments, as depicted in fig. 2, a barrier layer 14 is disposed between the first end 111 and the second end 112 of the capsule-containing chamber 110, the barrier layer 14 isolating the first end 111 and the second end 112 of the microcapsule-containing chamber 110 from each other. The barrier layer 14 may prevent the first filler 12 from mixing with the second filler 13.
In some embodiments, the material of the first filler 12 is a ferromagnetic material or a ferrimagnetic material, such as neodymium iron boron ferromagnetic, ferrite magnet, ferroferric oxide, ferrosilicon aluminum powder, and the like.
In some embodiments, the second filler 13 is a quantum dot material. The quantum dot material has the advantages of narrow emission half-peak width, adjustable emission peak and the like, and can realize color display by using the quantum dot material as a luminescent material. The quantum dot material may be a binary or multiple group II-VI semiconductor material, a binary or multiple group II-V semiconductor material, or the like. The quantum dot material may be a core quantum dot or a core-shell quantum dot.
The structure of the microcapsule 1 of the present application is similar to a Janus (Janus-like) structure, and the preparation method thereof can adopt the existing preparation method of the Janus structure, such as a microfluidic technology, interfacial polymerization or a spray drying method.
The present application also provides an electronic ink comprising a solvent 2 and a plurality of microcapsules 1 dispersed in the solvent 2, as shown in fig. 3. The microcapsule 1 is dispersed in the solvent 2, so that the microcapsule 1 can be ensured to rotate freely under the action of an external magnetic field, and the directional arrangement of a plurality of microcapsules 1 can be realized.
The solvent 2 is selected in consideration of the material of the capsule shell 11, and the solvent 2 is required to disperse the microcapsules 1 well but not to dissolve the microcapsules 1. The solvent 2 preferably also has the characteristics of high boiling point, low viscosity, high light transmittance, high stability, no peculiar smell, environmental friendliness and the like. The solvent 2 may be an olefin, an alkane, an ether, or the like. Specifically, the solvent 2 may be octadecene.
The present application further provides an electronic ink screen 3, which includes a plurality of display units 300, each display unit 300 includes at least one ink accommodating cavity 30, the display side of the ink accommodating cavity 30 is transparent, and the ink accommodating cavity 30 is filled with the electronic ink of the present application. The display unit 300 further comprises a first magnetic field generating means 31 and a second magnetic field generating means 32; the first magnetic field generating means 31 controllably generates a first magnetic field on the display side of the display unit 300 so that the first end 111 of the microcapsule 1 contained in the display unit 300 is turned to the display side by the first magnetic field and the second end 112 is away from the display side; the second magnetic field generating device 32 controllably generates the second magnetic field at the other side of the display unit 300 from the display side, so that the first end 111 of the microcapsule 1 contained in the display unit 300 is moved away from the display side by the second magnetic field and the second end 112 is turned to the display side.
It is understood that the display side of the ink accommodating chamber 30 is the same side as the display side of the display unit 300.
Fig. 4 is an example of the display of an embodiment of the electronic ink screen 3, in which the display unit 300a emits light for display, and the display unit 300b does not emit light or emits light of a different color, so as to form a color contrast with the display unit 300a for display. The second magnetic field generating device 32 of the display unit 300a is controlled to generate the second magnetic field such that the second end 112 of the microcapsule 1 is directed to the display side, and at this time, the excitation light entering the ink containing chamber 30 from the display side may excite the second filler 13 in the second end 112 to emit light. At the same time, the first magnetic field generating device 31 of the display unit 300b is controlled to generate the first magnetic field with the first end 111 of the microcapsule 1 directed to the display side, at which time the excitation light entering the ink accommodating chamber 30 from the display side is irradiated to the first filler 12 in the first end 111, and the first filler 12 does not emit light or emits light of a color different from that of the second filler 13.
The electronic ink screen 3 of the present application uses the electronic ink as a display material, and uses different magnetic fields to make the electronic ink in different display units 300 exhibit different display effects, and the control method is simple and reliable. In addition, due to the wide selection range of the photoluminescent materials of the microcapsule 1 in the electronic ink, especially when the photoluminescent materials are quantum dot materials, the electronic ink screen 3 with excellent color display effect can be obtained.
In some embodiments, the second fillers 13 of the microcapsules 1 in each display unit 300 emit light of the same color under the irradiation of the excitation light, i.e., the light emission color of each display unit 300 is the same. In other embodiments, at least some of the second fillers 13 of the microcapsules 1 in the display unit 300 emit light of different colors under the irradiation of the excitation light, i.e., at least some of the display units 300 emit light of different colors.
In some embodiments, the display units 300 are arranged in an array, and the ink containing cavities 30 in each display unit 300 are arranged in an array. The display units 300 are opaque, that is, the display units 300 are blocked by a light-shielding material, so as to prevent light of the display unit 300a to be displayed from entering the adjacent display unit 300b not to be displayed.
In some embodiments, each display unit 300 includes a plurality of ink accommodating chambers 30, that is, the first magnetic field generating device 31 and the second magnetic field generating device 32 of each display unit 300 control the display states of the plurality of ink accommodating chambers 30, as shown in fig. 5. Thus, the manufacturing cost is reduced, and the method is suitable for the electronic ink screen 3 with low requirement on resolution.
In other embodiments, each display unit 300 includes one ink accommodating chamber 30, that is, each pair of the first magnetic field generating device 31 and the second magnetic field generating device 32 controls the display state of one ink accommodating chamber 30, so that the pixels can be independently controlled, which is favorable for obtaining a high-resolution electronic ink screen 3, as shown in fig. 6 and 7.
In some embodiments, the ink containing chamber 30 includes a top wall 301, a bottom wall 302, and a sidewall 303 surrounding the periphery, wherein the top wall 301 is transparent to light and the sidewall 303 is opaque to light. The opaque sidewall 303 prevents light from the display ink receiving chamber 30 from striking the adjacent non-display ink receiving chamber 30.
Further, the first magnetic field generating device 31 is disposed above the top wall 301, a region of the first magnetic field generating device 31 opposite to the top wall 301 is light-transmissive, and the second magnetic field generating device 32 is disposed below the bottom wall 302. It is understood that the first magnetic field generating device 31 is opposite to the top wall 301 of the one or more ink containing chambers 30, and the second magnetic field generating device 32 is opposite to the bottom wall 302 of the one or more ink containing chambers 30. The first magnetic field generating device 31 is adapted to generate a first magnetic field at the top wall 301 of the ink accommodating chamber 30, and the second magnetic field generating device 32 is adapted to generate a second magnetic field at the bottom wall 302 of the ink accommodating chamber 30. The exciting light is incident into the ink containing chamber 30 through the first magnetic field generating means 31 and the top wall 301. The information of the electronic ink screen 3 is displayed by controlling the on and off of each first magnetic field generating device 31 or second magnetic field generating device 32.
It should be noted that the top wall 301 and the first magnetic field generating device 31 may be two parts of a unitary component, or may be two independent components, and the bottom wall 302 and the second magnetic field generating device 32 may be two parts of a unitary component, or may be two independent components, which is not limited in this application.
When neither the first magnetic field generating device 31 nor the second magnetic field generating device 32 of each ink containing chamber 30 is turned on, the microcapsules 1 in the electronic ink are relatively uniformly dispersed in the solvent 2, as shown in fig. 6. At this time, the electronic ink in each ink accommodating chamber 30 is in a substantially consistent state, after the external light source enters each ink accommodating chamber 30, the light emitting degrees of the electronic ink in each ink accommodating chamber 30 are substantially consistent, and at this time, the electronic ink screen 3 does not display information.
When the ink containing chamber 30a needs to be displayed and the ink containing chamber 30b does not need to be displayed: the second magnetic field generating device 32 on the lower side of the ink containing cavity 30a to be displayed is enabled to generate a second magnetic field, the microcapsule 1 in the ink containing cavity 30a to be displayed rotates under the action of the magnetic field, so that the first end 111 of the microcapsule 1 faces downwards, the second end 112 faces upwards, and the microcapsule 1 is gathered on the side of the ink containing cavity 30a close to the second magnetic field generating device 32, as shown in fig. 7, the external incident light enters from the upper side of the ink containing cavity 30a and irradiates to the second end 112 of the microcapsule 1, the second filler 13 in the second end 112 emits the emitting light with the color different from that of the incident light under the excitation of the incident light, and the emitting light is emitted from the upper side of the ink containing cavity 30a, so that the ink containing cavity 30a completes the display; the first magnetic field generating device 31 on the upper side of the ink containing cavity 30b which is not displayed generates a magnetic field, the microcapsule 1 in the ink containing cavity 30b which is not displayed rotates under the action of the magnetic field, so that the first end 111 of the microcapsule 1 faces upwards, the second end 112 faces downwards, and the microcapsule 1 is gathered on the side of the ink containing cavity 30b close to the first magnetic field generating device 31, as shown in fig. 7, the external incident light enters from the upper side of the ink containing cavity 30b and irradiates to the first end 111 of the microcapsule 1, the first filler 12 on the first end 111 does not emit light or emits light with a color different from that of the second filler 13, so that the ink containing cavity 30b which is not displayed forms a color contrast with the ink containing cavity 30a which is displayed, and the electronic ink screen 3 presents information which needs to be displayed.
In some embodiments, the electronic ink screen 3 further comprises a backplane 33 and a substrate 35. Each second magnetic field generating device 32 is arranged on the bottom plate 33, at least one ink accommodating cavity 30 is arranged on each second magnetic field generating device 32, each first magnetic field generating device 31 and each second magnetic field generating device 32 are arranged above the ink accommodating cavity 30 in a one-to-one correspondence mode, the substrate 35 is arranged on each first magnetic field generating device 32, and the substrate 35 is light-transmitting.
In some embodiments, the electronic ink fills each ink containing chamber 30.
The application also provides a display method, which comprises the following steps:
providing an electronic ink screen, wherein the electronic ink screen is provided with a plurality of display units, each display unit comprises at least one ink accommodating cavity, the display side of each ink accommodating cavity is transparent, and each ink accommodating cavity is filled with the electronic ink;
generating a first magnetic field on a display side of a display unit where display is not required, the first magnetic field causing a first end 111 of a microcapsule 1 contained in the display unit to face the display side and a second end 112 to be away from the display side;
generating a second magnetic field on the other side of the display unit needing to display, wherein the second magnetic field enables the first end 111 of the microcapsule 1 contained in the display unit to be far away from the display side and the second end 112 to be towards the display side;
incident light is irradiated from the display side into each ink containing chamber, the second filler 13 in the second end 112 toward the display side emits light under excitation of the incident light, and the first filler 12 in the first end 111 toward the display side emits no light or light of a different color from the second filler 13.
The present application further provides a display device 4, which includes the electronic ink screen 3 and the control system, wherein the control system is electrically connected to the first magnetic field generating device and the second magnetic field generating device of each display unit of the electronic ink screen 3, and is used for controlling the generation of the first magnetic field and the second magnetic field.
The display device 4 provided by the application can be used as an electronic price tag, the application scene is shown in fig. 8, and the electronic ink screen 3 is arranged on the shelf 5 and used for displaying information such as names and prices of articles on the shelf. Generally, ambient light (e.g., sunlight, LED lamps) in the commercial site contains a large amount of short-wavelength light, and the short-wavelength light can excite the second filler 13 to emit light, so as to display information on the electronic ink screen 3.
In some embodiments, the display device 4 further comprises an excitation light source 41, and the excitation light source 41 is disposed above the electronic ink screen 3 and is used for generating excitation light to excite the second filler 13 of the microcapsule 1 in the electronic ink to emit light. The excitation light source 41 can ensure the display effect of the electronic ink screen 3, so that the display brightness of the electronic ink screen 3 is higher, the display color is brighter, and the shelf decoration function is also realized.
In some embodiments, the excitation light source 41 is a light bar emitting blue light, which is disposed at the bottom of the upper shelf 5 and is opposite to the electronic ink screen 3 on the lower shelf 5.
The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.
Claims (12)
1. The microcapsule is characterized by comprising a capsule shell layer, wherein the capsule shell layer defines a capsule accommodating cavity, a first end of the capsule accommodating cavity is filled with a first filler, a second end, far away from the first end, of the capsule accommodating cavity is filled with a second filler, the first filler has magnetism, the second filler has no magnetism or weaker magnetism than the first filler, the second filler is made of a photoluminescent material, and the capsule shell layer is light-permeable;
under the irradiation of exciting light, the first filler does not emit light, and the second filler emits light;
or, under the irradiation of the exciting light, the first filler and the second filler emit light with different colors.
2. A microcapsule according to claim 1, characterized in that the particle size of said microcapsule is from 50 to 500 μm, the particle size of the particles in said first filler is from 100 to 1 μm, and the particle size of the particles in said second filler is from 1 to 100 nm.
3. A microcapsule according to claim 1, characterized in that the material of said first filler is a ferromagnetic material or a ferrimagnetic material.
4. A microcapsule according to claim 1, characterized in that the material of the second filler is a quantum dot material.
5. A microcapsule according to any one of claims 1 to 4, wherein a barrier is provided between said first end and said second end of said capsule-containing chamber, said barrier separating said first end from said second end.
6. Electronic ink, comprising a solvent and a plurality of microcapsules dispersed in the solvent, the microcapsules being according to any one of claims 1 to 5.
7. An electronic ink screen comprising a plurality of display units, wherein each of the display units comprises at least one ink accommodating chamber, the display side of each of the ink accommodating chambers is transparent, the ink accommodating chambers are filled with the electronic ink according to claim 6, the display unit further comprises a first magnetic field generating device and a second magnetic field generating device, the first magnetic field generating device is controllable to generate a first magnetic field on the display side of the display unit, so that the first end of the microcapsule contained in the display unit is turned to the display side under the action of the first magnetic field, the second end is far away from the display side, the second magnetic field generating device is controllable to generate a second magnetic field on the other side of the display unit far away from the display side, so that the first end of the microcapsule contained in the display unit is far away from the display side under the action of the second magnetic field, the second end turns to the display side.
8. The electronic ink screen of claim 7, wherein each of the display units is arranged in an array, each of the ink receiving chambers in each of the display units is arranged in an array, and no light is transmitted between the display units.
9. The electronic ink screen of claim 7 or 8, wherein the inner wall of the ink containing chamber comprises a top wall, a bottom wall and a side wall surrounding the top wall, the top wall is transparent, the side wall is opaque, the first magnetic field generating device is disposed above the top wall, an area of the first magnetic field generating device opposite to the top wall is transparent, and the second magnetic field generating device is disposed below the bottom wall.
10. A display method, characterized by comprising the steps of:
providing an electronic ink screen having a plurality of display units, each display unit comprising at least one ink containing cavity, the display side of each ink containing cavity being transparent, each ink containing cavity being filled with the electronic ink as claimed in claim 6;
generating a first magnetic field at a display side of the display unit where display is not required, the first magnetic field causing the first end of the microcapsule contained in the display unit to face the display side and the second end to be away from the display side;
generating a second magnetic field at the other side of the display unit to be displayed away from the display side, the second magnetic field causing the first ends of the microcapsules contained in the display unit to be away from the display side and the second ends to be toward the display side;
incident light is irradiated from the display side into each of the ink containing chambers, the second filler in the second end toward the display side emits light under excitation of the incident light, and the first filler in the first end toward the display side emits no light or light of a color different from that of the second filler.
11. A display device comprising the electronic ink screen according to any of claims 7 to 9 and a control system electrically connected to the first and second magnetic field generating means of each of the display units for controlling the generation of the first and second magnetic fields.
12. The display device as claimed in claim 11, wherein the display device is applied to an electronic price tag, and further comprising an excitation light source for exciting the electronic ink of the electronic ink screen to emit light.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010176694.XA CN111381413B (en) | 2020-03-13 | 2020-03-13 | Microcapsule, electronic ink screen, display method and display device |
| PCT/CN2021/074761 WO2021179850A1 (en) | 2020-03-13 | 2021-02-02 | Microcapsules, electronic ink, electronic ink screen, display method, and display device |
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| CN202010176694.XA CN111381413B (en) | 2020-03-13 | 2020-03-13 | Microcapsule, electronic ink screen, display method and display device |
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| CN111381413B CN111381413B (en) | 2023-06-09 |
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| WO2021179850A1 (en) * | 2020-03-13 | 2021-09-16 | 纳晶科技股份有限公司 | Microcapsules, electronic ink, electronic ink screen, display method, and display device |
| CN114077115A (en) * | 2021-11-19 | 2022-02-22 | 京东方科技集团股份有限公司 | Electronic paper display panel, driving method, driving device and electronic paper equipment |
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| WO2021179850A1 (en) | 2021-09-16 |
| CN111381413B (en) | 2023-06-09 |
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