CN111381413B - 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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- CN111381413B CN111381413B CN202010176694.XA CN202010176694A CN111381413B CN 111381413 B CN111381413 B CN 111381413B CN 202010176694 A CN202010176694 A CN 202010176694A CN 111381413 B CN111381413 B CN 111381413B
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual 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, wherein the microcapsules comprise capsule shells, the capsule shells define capsule accommodating cavities, first ends of the capsule accommodating cavities are filled with first fillers, second ends of the capsule accommodating cavities, which are far away from the first ends, are filled with second fillers, the first fillers have magnetism, the second fillers do not have magnetism or are weaker than the first fillers, the second fillers are made of photoluminescent materials, and the capsule shells are 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 light of different colors under the same illumination. The microcapsule can change the display effect of the microcapsule in a specific direction by applying magnetic fields in different directions, the display color of the electronic ink can be customized according to the needs, and the display effect can be realized by reasonably selecting the second filler 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 a commercial electronic book and as small as an electronic price tag. The electronic price tag is also called an electronic shelf tag, is an electronic display device with an information receiving and transmitting function, is connected with a market computer database through a wired or wireless network, displays the latest commodity information through a display screen on the electronic price tag, and has the advantages of being simple to operate, easy to read and capable of saving paper and manpower resources.
The electronic ink screen widely used at present 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 the application
It is an object of the present application to provide a microcapsule useful for display and an electronic ink including the microcapsule.
Another object of the present application is to provide an electronic ink screen that can be used for partial color display or full color display, and a display device including the electronic ink screen.
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 being magnetic, the second filler being non-magnetic or less magnetic than the first filler, the second filler being of a photoluminescent material, the capsule shell being light permeable;
under the irradiation of excitation light, the first filler does not emit light, and the second filler emits light;
alternatively, the first filler and the second filler emit light of different colors under irradiation of excitation light.
Further, the particle size of the microcapsule is 50 μm to 500 μm, the particle size of the particles in the first filler is 100nm to 1 μm, and the particle size of the particles in the second filler is 1nm to 100nm.
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 provided between the first and second ends of the capsule receiving chamber, the barrier layer separating the first and second ends.
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 being as described herein before.
According to another aspect of the present application, there is provided an electronic ink screen, including a plurality of display units, each of the display units includes at least one ink accommodation chamber, a display side of each of the ink accommodation chambers is transparent, the ink accommodation chamber is filled with the electronic ink described herein, the display units further include 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 included 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, and the second magnetic field generating device controllably generates 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 included in the display unit is far away from the display side under the action of the second magnetic field, and the second end is turned to the display side.
Further, each display unit is arranged in an array, each ink accommodating cavity in each display unit is arranged in an array, and light is not transmitted between each display unit.
Further, the inner wall of the ink accommodating cavity comprises a top wall, a bottom wall and side walls surrounding the periphery, the top wall is transparent, the side walls are opaque, 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 transparent, 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 electronic ink disclosed by the application;
generating a first magnetic field on a display side of the display unit where display is not required, the first magnetic field causing the first end of the microcapsules contained within the display unit to face the display side and the second end to be away from the display side;
generating a second magnetic field on the other side of the display unit, which is remote from the display side, where the second magnetic field causes the first ends of the microcapsules contained in the display unit to be remote from the display side, the second ends being directed toward the display side;
incident light is irradiated from the display side into each of the ink accommodating 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 does not emit light or emits light of a color different from that of the second filler.
According to another aspect of the present application, there is provided a display device, including the electronic ink screen and the control system, 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 configured to control 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, wherein 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 can change the display effect of the microcapsule in a specific direction by applying magnetic fields in different directions, and can be used for display;
(2) The electronic ink disclosed by the application 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 according to the requirement, and the second filler in the microcapsule can be reasonably selected.
Drawings
FIG. 1 is a schematic view of one embodiment of a microcapsule of the present application;
FIG. 2 is a schematic illustration of another embodiment of a microcapsule of the present application;
FIG. 3 is a schematic diagram of one embodiment of an 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 the second magnetic field generating device generates the second magnetic field;
FIG. 6 is a schematic longitudinal cross-sectional view of a portion of an electronic ink screen of the present application, showing the first magnetic field generating devices and the second magnetic field generating devices in an unopened state;
FIG. 7 is a schematic longitudinal cross-sectional view of a portion of an electronic ink screen of the present application wherein a second magnetic field is generated by a second magnetic field generating device of an ink receiving chamber that is to be displayed and a first magnetic field is generated by a first magnetic field generating device of an ink receiving chamber that is not to be displayed;
FIG. 8 shows an application scenario of the display device of the present application;
in the figure:
1. a microcapsule; 11. a capsule shell; 110. a capsule receiving 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 (300 a/300 b), a display unit; 30 (30 a/30 b), an ink containing chamber; 301. a top wall; 302. a bottom surface; 303. a sidewall; 31. a first magnetic field generating device; 32. a second magnetic field generating device; 33. a bottom plate; 34. a pixel defining layer; 35. a substrate.
4. A display device; 41. an excitation light source;
5. and (5) a goods shelf.
Detailed Description
The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be noted that, for the azimuth terms such as terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present application and simplifying the description, and it is not to be construed as limiting the specific protection scope of the present application that the device or element referred to must have a specific azimuth configuration and operation, as indicated or implied.
It should be 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 objects and not necessarily for describing a particular sequential or chronological order.
The terms "comprises" and "comprising," along with any variations thereof, in the description and claims of the present 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 that are 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 receiving cavity 110, a first end 111 of the capsule receiving cavity 110 being filled with a first filler 12, and a second end 112 of the capsule receiving cavity 110 remote from the first end 111 being filled with a second filler 13.
The first filler 12 has magnetic properties and the second filler 13 has no magnetic properties or is less magnetic than 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 greater force by the magnetic field than the second end 112, so that the first end 111 of the microcapsule 1 tends to turn in the direction of the magnetic field and move in the direction of the magnetic field.
The material of the second filler 13 is a photoluminescent material. The capsule shell 11 is light transmissive, allowing light to pass through the capsule shell 11 to impinge on the second filler 13, and also allowing light emitted by the second filler 13 to pass through the capsule shell 11.
Under the irradiation of 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 of different colors, and the material of the first filler 13 may be a photoluminescent material or may not be a photoluminescent material. 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 is different from that of the second end 112.
It will be appreciated that the first filler 12 comprises one or more magnetic materials and the second filler 13 comprises one or more photoluminescent materials, which are not limited in this application.
The microcapsules 1 provided by the 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 microcapsules 1 face to a specific direction; further, since the response of both ends of the microcapsule 1 to the excitation light is different, 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 microcapsule 1 has a particle size of 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 100nm.
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-receiving chamber 110, the barrier layer 14 isolating the first end 111 and the second end 112 of the microcapsule-receiving 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 magnets, ferroferric oxide, ferro-silicon-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 microcapsule 1 of the present application has a structure similar to a Janus (double sided god) structure, and the preparation method can be a preparation method of the existing Janus structure, such as a microfluidic technology, an 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 microcapsules 1 are dispersed in the solvent 2, so that the microcapsules 1 can be ensured to freely rotate under the action of an external magnetic field, and the directional arrangement of a plurality of microcapsules 1 is more facilitated.
The choice of solvent 2 needs to take into account the material of the capsule shell 11, and the solvent 2 needs to disperse the microcapsules 1 well, but not 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 alkene, alkane, ether, etc. Specifically, the solvent 2 may be octadecene.
The application also provides an electronic ink screen 3, which comprises a plurality of display units 300, wherein each display unit 300 comprises 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. 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 at the display side of the display unit 300 such that the first ends 111 of the microcapsules 1 contained in the display unit 300 are turned towards the display side by the first magnetic field and the second ends 112 are remote from the display side; the second magnetic field generating means 32 controllably generates a second magnetic field at the other side of the display unit 300 remote from the display side, such that the first ends 111 of the microcapsules 1 contained in the display unit 300 are remote from the display side under the influence of the second magnetic field, and the second ends 112 are turned towards the display side.
It will be appreciated that the display side of the ink containing chamber 30 is the same side as the display side of the display unit 300.
Fig. 4 is an example of when an embodiment of the electronic ink screen 3 is displayed, 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, thereby forming color contrast with the display unit 300a for display. The second magnetic field generating means 32 of the display unit 300a is controlled to generate the second magnetic field such that the second ends 112 of the microcapsules 1 face the display side, and at this time, the excitation light from the display side to the ink containing chamber 30 can excite the second filler 13 in the second ends 112 to emit light. Meanwhile, the first magnetic field generating means 31 of the display unit 300b is controlled to generate the first magnetic field such that the first end 111 of the microcapsule 1 is directed to the display side, and at this time, the excitation light from the display side to the ink containing chamber 30 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 application uses the electronic ink as a display material, and uses different magnetic fields to enable the electronic ink in different display units 300 to present different display effects, and the control method is simple and reliable. In addition, since the photoluminescent material of the microcapsules 1 in the electronic ink has a wide range of choices, particularly when the photoluminescent material is a quantum dot material, the electronic ink screen 3 excellent in color display effect can be obtained.
In some embodiments, the second filler 13 of the microcapsules 1 within each display unit 300 emits the same color of light under the irradiation of the excitation light, i.e., the emission color of each display unit 300 is the same. In other embodiments, at least part of the second filler 13 of the microcapsules 1 within the display unit 300 emits light of a different color under the irradiation of the excitation light, i.e. at least part of the display unit 300 emits light of a different color.
In some embodiments, the display units 300 are arranged in an array, and the ink-accommodating chambers 30 within 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 shading material, so that light of the display unit 300a for displaying is prevented from entering the adjacent display unit 300b which is not displayed.
In some embodiments, each display unit 300 includes a plurality of ink containing 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 containing chambers 30, as shown in fig. 5. Thus, the manufacturing cost is reduced, and the electronic ink screen 3 is suitable for the electronic ink screen 3 with low resolution requirements.
In other embodiments, each display unit 300 includes one ink containing 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 containing chamber 30, and independent control of pixels is achieved, which is advantageous for obtaining the high-resolution electronic ink screen 3, as shown in fig. 6 and 7.
In some embodiments, ink-containing chamber 30 includes a top wall 301, a bottom wall 302, and a peripheral side wall 303, top wall 301 being light transmissive and side wall 303 being light impermeable. The light-tightness of the side wall 303 prevents light rays in the displayed ink-accommodating chamber 30 from being incident into the adjacent non-displayed ink-accommodating chamber 30.
Further, a first magnetic field generating device 31 is provided above the ceiling 301, a region of the first magnetic field generating device 31 opposite to the ceiling 301 is light-transmitting, and a second magnetic field generating device 32 is provided below the bottom wall 302. It will be appreciated that the first magnetic field generating device 31 is opposite the top wall 301 of the one or more ink containing chambers 30 and the second magnetic field generating device 32 is opposite 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 a top wall 301 of the ink containing chamber 30 and the second magnetic field generating device 32 is adapted to generate a second magnetic field at a bottom wall 302 of the ink containing chamber 30. The excitation light is incident into the ink containing chamber 30 through the first magnetic field generating device 31 and the ceiling 301. The display of the information of the electronic ink screen 3 is realized 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 an integral 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 an integral component, or may be two independent components, which is not limited in this application.
When neither the first magnetic field generating means 31 nor the second magnetic field generating means 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 containing cavity 30 is substantially identical in state, and after the external light source enters each ink containing cavity 30, the electronic ink in each ink containing cavity 30 is substantially identical in light emitting degree, and the electronic ink screen 3 at this time does not display information.
When the ink containing chamber 30a needs to be displayed, the ink containing chamber 30b does not need to be displayed: the second magnetic field generating device 32 at the lower side of the ink containing cavity 30a to be displayed is caused to generate a second magnetic field, the microcapsule 1 in the ink containing cavity 30a to be displayed is rotated 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 at one side of the ink containing cavity 30a close to the second magnetic field generating device 32, as shown in fig. 7, external incident light enters from the upper side of the ink containing cavity 30a and irradiates the second end 112 of the microcapsule 1, the second filler 13 in the second end 112 emits emitted light with different color from the incident light under the excitation of the incident light, and the emitted 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 shown, generates a magnetic field, the microcapsules 1 in the ink containing cavity 30b, which is not shown, rotate under the action of the magnetic field, so that the first ends 111 of the microcapsules 1 face upwards, the second ends 112 face downwards, and the microcapsules 1 are gathered on the side of the ink containing cavity 30b, which is close to the first magnetic field generating device 31, as shown in fig. 7, external incident light enters from the upper side of the ink containing cavity 30b and irradiates the first ends 111 of the microcapsules 1, the first fillers 12 of the first ends 111 do not emit light or emit light with a color different from that of the second fillers 13, and accordingly the ink containing cavity 30b, which is not shown, and the ink containing cavity 30a, which is shown, form color contrast, so that the electronic ink screen 3 presents information to be displayed.
In some embodiments, electronic ink screen 3 also includes a backplane 33 and a substrate 35. The second magnetic field generating devices 32 are disposed on the bottom plate 33, at least one ink accommodating chamber 30 is disposed on each second magnetic field generating device 32, the first magnetic field generating devices 31 are disposed above the ink accommodating chambers 30 in one-to-one correspondence with the second magnetic field generating devices 32, the substrate 35 is disposed on the first magnetic field generating devices 32, and the substrate 35 is transparent.
In some embodiments, the electronic ink fills each ink receiving 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 disclosed by the application;
generating a first magnetic field on a display side of the display unit where display is not required, the first magnetic field causing a first end 111 of the microcapsules 1 contained in the display unit to face the display side and a second end 112 to face away from the display side;
generating a second magnetic field on the other side of the display unit to be displayed, which is away from the display side, the second magnetic field causing the first ends 111 of the microcapsules 1 contained in the display unit to be away from the display side, the second ends 112 being directed towards the display side;
the incident light is irradiated from the display side into each ink accommodating chamber, and the second filler 13 in the second end 112 facing the display side emits light upon excitation of the incident light, and the first filler 12 in the first end 111 facing the display side does not emit light or emits light of a color different from that of the second filler 13.
The application also provides a display device 4, which comprises the electronic ink screen 3 and a control system, wherein the control system is electrically connected with 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, an application scene of the electronic price tag is shown in fig. 8, and the electronic ink screen 3 is arranged on the goods shelf 5 and is used for displaying information such as names and prices of goods on the goods shelf. Typically, the ambient light (e.g. sunlight, LED lamp) in the market contains a large amount of short wavelength light, and these short wavelength light can excite the second filler 13 to emit light, so as to implement information display of the electronic ink screen 3.
In some embodiments, the display device 4 further comprises an excitation light source 41, the excitation light source 41 being arranged above the electronic ink screen 3 for generating excitation light for exciting the second filler 13 of the microcapsules 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 effect of shelf decoration is also realized.
In some embodiments, the excitation light source 41 is a blue-emitting light bar that is disposed at the bottom of the upper shelf 5 and opposite the electronic ink screen 3 on the lower shelf 5.
The foregoing has outlined the basic principles, main features and advantages of the present application. It will be appreciated by persons skilled in the art that the present application is not limited to the embodiments described above, and that the embodiments and descriptions described herein are merely illustrative of the principles of the present application, and that various changes and modifications may be made therein without departing from the spirit and scope of the application, which is defined by the appended claims. The scope of protection of the present application is defined by the appended claims and equivalents thereof.
Claims (12)
1. 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 being magnetic, the second filler being non-magnetic or less magnetic than the first filler, the second filler being of a photoluminescent material, the capsule shell being light permeable;
under the irradiation of excitation light, the first filler does not emit light, and the second filler emits light;
or, under the irradiation of excitation light, the first filler and the second filler emit light with different colors;
a barrier layer is disposed between the first and second ends of the capsule receiving chamber, the barrier layer separating the first and second ends.
2. Microcapsules according to claim 1, wherein the particle size of the microcapsules is 50-500 μm, the particle size of the particles in the first filler is 100-1 μm and the particle size of the particles in the second filler is 1-100 nm.
3. The microcapsule according to claim 1, wherein the material of the first filler is a ferromagnetic material or a ferrimagnetic material.
4. The microcapsule according to claim 1, wherein the material of the second filler is a quantum dot material.
5. Electronic ink comprising a solvent and a plurality of microcapsules dispersed in said solvent, said microcapsules being as claimed in any one of claims 1 to 4.
6. An electronic ink screen comprising a plurality of display units, each of said display units comprising at least one ink-receiving chamber, the display side of each of said ink-receiving chambers being transparent, said ink-receiving chamber being filled with electronic ink according to claim 5, said display units further comprising first magnetic field generating means controllably generating a first magnetic field at the display side of said display unit whereby said first ends of said microcapsules contained in said display units are deflected towards said display side under the influence of said first magnetic field, and second magnetic field generating means controllably generating a second magnetic field at the other side of said display unit remote from said display side whereby said first ends of said microcapsules contained in said display units are deflected away from said display side under the influence of said second magnetic field.
7. The electronic ink screen of claim 6, wherein the display units are arranged in an array, the ink-receiving chambers in each of the display units are arranged in an array, and light is not transmitted between the display units.
8. The electronic ink screen of claim 6 or 7, wherein the inner wall of the ink receiving cavity comprises a top wall, a bottom wall and side walls surrounding the periphery, the top wall is transparent, the side walls are opaque, the first magnetic field generating device is arranged above the top wall, a region of the first magnetic field generating device opposite to the top wall is transparent, and the second magnetic field generating device is arranged below the bottom wall.
9. The display method is characterized by comprising the following steps:
providing an electronic ink screen, wherein each display unit comprises at least one ink accommodating cavity, the display side of each ink accommodating cavity is light-transmitting, each ink accommodating cavity is filled with electronic ink, each electronic ink comprises a solvent and a plurality of microcapsules dispersed in the solvent, each microcapsule comprises a capsule shell, the capsule shells define a capsule accommodating cavity, a first end of each capsule accommodating cavity is filled with a first filler, a second end of each capsule accommodating cavity far away from the first end is filled with a second filler, the first filler is magnetic, the second filler does not have magnetism or has magnetism weaker than the first filler, the second filler is made of a material, the capsule shells are light-transmitting, under excitation light irradiation, the first filler does not emit light, the second filler emits light, or under excitation light irradiation, the first filler and the second filler emit light of different colors;
generating a first magnetic field on a display side of the display unit where display is not required, the first magnetic field causing the first end of the microcapsules contained within the display unit to face the display side and the second end to be away from the display side;
generating a second magnetic field on the other side of the display unit, which is remote from the display side, where the second magnetic field causes the first ends of the microcapsules contained in the display unit to be remote from the display side, the second ends being directed toward the display side;
incident light is irradiated from the display side into each of the ink accommodating 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 does not emit light or emits light of a color different from that of the second filler.
10. The display method according to claim 9, wherein the electronic ink is the electronic ink of claim 5.
11. A display device comprising an electronic ink screen according to any one of claims 6-8 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 of claim 11, wherein the display device is applied to an electronic price tag, the display device further comprising an excitation light source for exciting the electronic ink of the electronic ink screen to emit light.
Priority Applications (2)
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| 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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| CN115774361B (en) * | 2021-09-08 | 2023-09-22 | 荣耀终端有限公司 | Electronic ink display panel, preparation method thereof and electronic equipment |
| 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 |
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