CN113655650B - Electronic device, display device and manufacturing method thereof - Google Patents
Electronic device, display device and manufacturing method thereof Download PDFInfo
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- CN113655650B CN113655650B CN202110942331.7A CN202110942331A CN113655650B CN 113655650 B CN113655650 B CN 113655650B CN 202110942331 A CN202110942331 A CN 202110942331A CN 113655650 B CN113655650 B CN 113655650B
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- 239000000463 material Substances 0.000 claims abstract description 69
- 238000005286 illumination Methods 0.000 claims abstract description 68
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 48
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 38
- 239000000203 mixture Substances 0.000 claims description 34
- 239000000178 monomer Substances 0.000 claims description 23
- 150000001875 compounds Chemical class 0.000 claims description 10
- DMLAVOWQYNRWNQ-UHFFFAOYSA-N azobenzene Chemical compound C1=CC=CC=C1N=NC1=CC=CC=C1 DMLAVOWQYNRWNQ-UHFFFAOYSA-N 0.000 claims description 7
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 6
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- 239000010410 layer Substances 0.000 description 69
- 230000004888 barrier function Effects 0.000 description 16
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Classifications
-
- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K19/2021—Compounds containing at least one asymmetric carbon atom
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
- C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
- C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
- C09K19/3405—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a five-membered ring
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3833—Polymers with mesogenic groups in the side chain
- C09K19/3842—Polyvinyl derivatives
- C09K19/3852—Poly(meth)acrylate derivatives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/38—Polymers
- C09K19/3833—Polymers with mesogenic groups in the side chain
- C09K19/3842—Polyvinyl derivatives
- C09K19/3852—Poly(meth)acrylate derivatives
- C09K19/3857—Poly(meth)acrylate derivatives containing at least one asymmetric carbon atom
-
- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133553—Reflecting elements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K2019/2078—Ph-COO-Ph-COO-Ph
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The disclosure relates to an electronic device, a display device and a manufacturing method of the display device, and relates to the technical field of display. The display device includes: a first substrate; the second substrate is arranged opposite to the first substrate, and at least one of the first substrate and the second substrate is of a transparent structure; the liquid crystal layer is arranged between the first base material and the second base material; the liquid crystal layer comprises a plurality of micro units which are arranged in a dispersing way, the micro units comprise cholesteric liquid crystal and cis-trans-isomerism materials, the cis-trans-isomerism materials can generate cis-trans isomerism under the illumination of a first wavelength and a second wavelength, and the first wavelength and the second wavelength are different; under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in the first light reflecting state; under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in the second light reflecting state; the first retroreflective state and the second retroreflective state exhibit different colors.
Description
Technical Field
The present disclosure relates to the field of display technology, and in particular, to an electronic device, a display device, and a method for manufacturing the display device.
Background
Currently, display devices generally include liquid crystal display devices, organic electroluminescence display devices, and the like. However, these display devices all require electric power for driving, for example, the liquid crystal display device needs to be energized to make the backlight emit light, and the deflection state of the liquid crystal needs to be controlled by a voltage to display an image; and the organic electroluminescent display device needs to be electrified to make the light emitting device emit light. These display devices all require power consumption, which is disadvantageous for energy saving.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
The present disclosure is directed to overcoming the shortcomings of the prior art, and providing an electronic device, a display device and a method for manufacturing the display device, which can display images without electric power driving.
According to an aspect of the present disclosure, there is provided a display device including:
a first substrate;
a second substrate disposed opposite to the first substrate, at least one of the first substrate and the second substrate being a transparent structure;
A liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer comprises a plurality of micro units which are arranged in a dispersing way, the micro units comprise cholesteric liquid crystal and cis-trans-isomerism materials, the cis-trans-isomerism materials can generate cis-trans isomerism under the illumination of a first wavelength and a second wavelength, and the first wavelength and the second wavelength are different;
under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in the first light reflecting state;
under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in the second light reflecting state;
the first retroreflective state and the second retroreflective state exhibit different colors.
In an exemplary embodiment of the present disclosure, the liquid crystal layer further includes:
a confining layer disposed between the first substrate and the second substrate; the limiting layer is provided with a plurality of mutually independent limiting cavities, and the microcells are distributed in each limiting cavity.
In one exemplary embodiment of the present disclosure, the defining layer is a mesh-like structure and extends along an extension direction of a surface of the first substrate or the second substrate adjacent to the liquid crystal layer.
In one exemplary embodiment of the present disclosure, the defining layer includes a plurality of first retaining walls and a plurality of second retaining walls, each of the first retaining walls being extendable in a first direction and being distributed in a second direction, each of the second retaining walls being extendable in the second direction and being distributed in the first direction; the first retaining wall and the second retaining wall are arranged in a crossing mode to define each limiting cavity.
In one exemplary embodiment of the present disclosure, the first light reflecting state includes a plurality of color states, each of the color states in which the micro-cell reflects visible light to exhibit one color, and in which the color exhibited by the micro-cell is different;
the first wavelength of illumination at a specified intensity within the first specified intensity range enables the microcell to be in one of the color states, and the first wavelength of illumination at a different of the specified intensities enables the microcell to be in a different of the color states.
In an exemplary embodiment of the present disclosure, the first wavelength is 315nm to 395nm and the second wavelength is 410nm to 490nm; said firstA specified intensity range and the second specified intensity range of 5mw/cm 2 -35mw/cm 2 。
In one exemplary embodiment of the present disclosure, the material of the defining layer comprises a photopolymerizable material.
In one exemplary embodiment of the present disclosure, the photopolymerizable material comprises polyacrylate.
In one exemplary embodiment of the present disclosure, the photopolymerizable material is polymerized from at least one of the following monomers:
in an exemplary embodiment of the present disclosure, the liquid crystal layer further includes:
the filling layer is arranged between the first base material and the second base material, the filling layer is provided with a plurality of meshes, and the microcells are distributed in each mesh.
In one exemplary embodiment of the present disclosure, the filler layer comprises a thermally polymerized material.
In one exemplary embodiment of the present disclosure, the thermally polymerized material comprises an epoxy resin.
In one exemplary embodiment of the present disclosure, the thermally polymerized material is polymerized from at least one of the following monomers:
wherein ,is->
In one exemplary embodiment of the present disclosure, the cis-trans isomerisable material comprises azobenzene; the azobenzene comprises at least one of the following compounds:
in one exemplary embodiment of the present disclosure, the cholesteric liquid crystal includes at least one of the following compounds:
In one exemplary embodiment of the present disclosure, the microcell further comprises a nematic liquid crystal.
In one exemplary embodiment of the present disclosure, the first substrate and the second substrate are both transparent structures;
the first base material comprises a first substrate and a first electrode positioned on one side of the first substrate close to the second base material;
the second substrate comprises a second substrate and a second electrode positioned on one side of the second substrate close to the first substrate.
According to one aspect of the present disclosure, there is provided a method of manufacturing a display device, including:
forming a first substrate and a second substrate, at least one of the first substrate and the second substrate being a transparent structure;
preparing a mixture comprising cholesteric liquid crystals, cis-trans isomerism materials, photo-polymerizable monomers and thermal polymerizable monomers; the cis-trans isomerism material can generate cis-trans isomerism under the illumination of a first wavelength range and a second wavelength range; the first wavelength and the second wavelength are different;
disposing the mixture on one side of the first substrate;
irradiating the mixture by using a mask to solidify a partial area of the mixture to form a limiting layer with a plurality of limiting cavities;
Heating the mixture with the limiting layer to cure part of the mixture in the limiting cavity to form a filling layer with meshes; the mixture within the cell is a microcell comprising cholesteric liquid crystal and a cis-trans isomerising material; under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in the first light reflecting state; under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in the second light reflecting state; the first reflecting state and the second reflecting state are different in color;
and covering the second substrate on one side of the mixture, which is away from the first substrate.
According to one aspect of the present disclosure, there is provided an electronic device including:
the display device according to any one of the above;
and the light-emitting device is used for emitting at least one of the light rays with the illumination intensity of the first wavelength in the first specified intensity range and the light rays with the illumination intensity of the second wavelength in the second specified intensity range.
In one exemplary embodiment of the present disclosure, the first substrate and the second substrate are both transparent structures;
The electronic device further includes:
the backlight module is arranged on one side of the first substrate, which is away from the second substrate; the backlight module is used for emitting one of light rays with illumination intensity of a first wavelength in the first specified intensity range and light rays with illumination intensity of a second wavelength in the second specified intensity range to the first substrate;
the light emitting device is capable of emitting at least the other of light of a first wavelength having an illumination intensity in the first specified intensity range and light of a second wavelength having an illumination intensity in the second specified intensity range.
In an exemplary embodiment of the disclosure, if the wavelength of the light emitted by the backlight module is a first wavelength, the first wavelength is 315nm-395nm;
the electronic device further includes:
and the filter layer is arranged on one side of the second substrate, which is away from the second substrate, and is used for filtering out the light rays with the first wavelength.
The electronic equipment, the display device and the manufacturing method thereof can realize the switching of the reflective state by utilizing the cis-trans isomerism molecules which can generate cis-trans isomerism under the irradiation of light with different wavelengths, and simultaneously can display various color states by utilizing the visible light as a light source and combining the characteristic that cholesteric liquid crystal molecules can reflect light rays with different colors under different irradiation intensities, thereby avoiding the adoption of electric energy driving and being beneficial to energy saving.
Specifically: the irradiation can be performed by using light having an illumination intensity within a first specified intensity range and a second specified intensity range and having one of a first wavelength and a second wavelength, so that cis-trans isomerism can occur in cis-trans isomerism molecules, and the arrangement of cholesteric liquid crystal molecules in the irradiated region is different from that in the non-irradiated region, that is, the reflection state of the microcells in the irradiated region is different from that in the non-irradiated region, thereby forming an image by the contrast between the irradiated region and the non-irradiated region. If the image is to be erased, the light with the wavelength of the other one of the first wavelength and the second wavelength can be used to irradiate the area irradiated in the previous time, so that the arrangement of cholesteric liquid crystal molecules in the irradiated area is the same as that in the non-irradiated area, namely the reflective state of the microcell is the same in color, and the contrast is eliminated, thereby erasing the image.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.
Fig. 1 is a schematic diagram of an embodiment of a display device according to the present disclosure in a first state.
Fig. 2 is a schematic diagram of an embodiment of a display device according to the present disclosure in a second state.
Fig. 3 is a partial top view of a liquid crystal layer of an embodiment of a display device of the present disclosure.
Fig. 4 is a schematic diagram of an embodiment of an electronic device of the present disclosure.
Fig. 5 is a schematic diagram of an embodiment of an electronic device of the present disclosure.
Reference numerals illustrate:
1. a first substrate; 11. a first substrate; 12. a first electrode;
2. a second substrate; 21. a first substrate; 22. a first electrode;
3. a barrier dam;
4. a liquid crystal layer; 41. a microcell; 411. cholesteric liquid crystal molecules; 412. a cis-trans isomerism molecule; 42. defining a layer; 420. defining a cavity; 421. a first retaining wall; 422. a second retaining wall; 43. a filling layer; 430. a mesh;
100. a display device; 200. a light emitting device; 300. and a backlight module.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.
The terms "a," "an," "the," "said" and "at least one" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and "third," etc. are used merely as labels, and do not limit the number of their objects.
The present disclosure provides a display device, as shown in fig. 1 and 2, which may include a first substrate 1, a second substrate 2, and a liquid crystal layer 4, wherein:
the second substrate 2 is arranged opposite to the first substrate 1, and at least one of the first substrate 1 and the second substrate 2 is of a transparent structure;
the liquid crystal layer 4 is arranged between the first substrate 1 and the second substrate 2; the liquid crystal layer 4 comprises a plurality of micro units 41 which are arranged in a dispersing way, the micro units 41 comprise cholesteric liquid crystal and cis-trans-isomerism materials, and the cis-trans-isomerism materials can generate cis-trans isomerism under the illumination of a first wavelength and a second wavelength, and the first wavelength is different from the second wavelength;
the microcell 41 is in a first light-reflecting state under light of a first wavelength whose light intensity is within a first specified intensity range;
Under illumination at a second wavelength having an illumination intensity within a second specified intensity range, the microcell 41 is in a second light-reflective state;
the first retroreflective state and the second retroreflective state exhibit different colors.
According to the display device of the embodiment of the disclosure, the pitch of cholesteric liquid crystal molecules can be adjusted by utilizing the cis-trans isomerism molecules 412 to generate cis-trans isomerism under the light irradiation of different wavelengths, so that the switching of a reflective state is realized, and meanwhile, the visible light can be used as a light source, and the characteristics of the cholesteric liquid crystal molecules 411 of different pitches can reflect light rays of different colors under different illumination intensities are combined to present various color states, so that the adoption of electric energy driving is avoided, and the energy saving is facilitated.
Specifically: the irradiation may be performed by using light having an illumination intensity within the first specified intensity range and the second specified intensity range and having one of the first wavelength and the second wavelength, so that the cis-trans isomerism of the cis-trans isomerism molecules 412 may occur, and the arrangement of the cholesteric liquid crystal molecules 411 of the irradiated region may be different from that of the non-irradiated region, that is, the light reflecting state of the microcells 41 of the irradiated region may be different from that of the non-irradiated region, thereby forming an image by contrast of the irradiated region and the non-irradiated region. If the image is to be erased, the light with the illumination intensity within the specified intensity range and the wavelength of the other of the first wavelength and the second wavelength irradiates the area irradiated previously, so that the arrangement of the cholesteric liquid crystal molecules 411 in the irradiated area is the same as that in the non-irradiated area, i.e. the reflective state of the microcell 41 is the same as that in the color, and contrast is eliminated, thereby erasing the image.
The display device of the present disclosure is described in detail below:
as shown in fig. 1 and 2, in order to accommodate the microcell 41, a liquid crystal cell accommodating the microcell 41 may be enclosed by the first substrate 1, the second substrate 2, and the barrier dam 3, specifically:
the first substrate 1 and the second substrate 2 may be disposed opposite to each other with a certain distance therebetween, and the first substrate 1 and the second substrate 2 may each have a single-layer or multi-layer structure, which is not particularly limited herein. Meanwhile, at least one of the first substrate 1 and the second substrate 2 may be a transparent structure for facilitating viewing of an image, and of course, both may be transparent structures.
The materials of the first substrate 1 and the second substrate 2 may be glass, PET (polyethylene terephthalate), PI (polyimide), and the like, and are not particularly limited herein.
As shown in fig. 1 and 2, a barrier dam 3 may be provided between the first substrate 1 and the second substrate 2 and in sealing engagement with the first substrate 1 and the second substrate 2. The barrier rib 3 may be a continuous ring structure so as to form a receiving space with the first substrate 1 and the second substrate 2, and the receiving space is a liquid crystal cell, which can receive the micro unit 41. The barrier dam 3 may be in the shape of a circular ring, a square ring, or the like, and is not particularly limited herein, and may be made of an insulating material such as resin.
As shown in fig. 1 and 2, a liquid crystal layer 4 may be formed in the liquid crystal cell, the liquid crystal layer 4 including a plurality of microcells 41, each microcell 41 may include cholesteric liquid crystal and cis-trans-isomer material, and in order to facilitate defining an initial alignment of the cholesteric liquid crystal, an alignment layer may be provided between the first substrate 1 and the second substrate 2, for example, the surface of the first substrate 1 adjacent to the first substrate 1 is provided with a first alignment layer, the surface of the second substrate 2 adjacent to the first substrate 1 is provided with a second alignment layer, and the first alignment layer and the second alignment layer each have at least a partial region within a range surrounded by the barrier dam 3, and both serve to bring the cholesteric liquid crystal into an initial alignment.
The cis-trans isomerism material can generate cis-trans isomerism under the illumination with the wavelength of the first wavelength and the second wavelength, thereby changing the arrangement state of cholesteric liquid crystal, so that the microcell 41 is switched between at least a first light reflecting state and a second light reflecting state.
Specifically, the light is irradiated at a first wavelength at the light intensity of the first specified intensity range, or at a second wavelength at the light intensity of the second specified intensity range, and the microcell 41 irradiated at the first wavelength is in the first light-reflecting state; the microcell 41 illuminated at the second wavelength is in a second light reflecting state. The colors of the first reflecting state and the second reflecting state are different after reflecting light rays, so that writing and erasing of images can be realized.
In addition to limiting the wavelength, the light intensity is also limited when changing the state of the micro-cell 41, so as to avoid interference of the ambient light with the switching of the state of the display device, and the state is not changed when the control and operation are not performed, so that the switching of the micro-cell 41 cannot be promoted by the ambient light.
In some embodiments of the present disclosure, the cholesteric liquid crystal of microcell 41 may include at least one of the following compounds:
in some embodiments of the present disclosure, the cis-trans isomerisable material described above may comprise azobenzene, which may include, for example, at least one of the following compounds:
as shown in fig. 1 and 2, in the second reflective state, i.e., in the initial state of the liquid crystal layer, cholesteric liquid crystal molecules are irregularly arranged, and light of a plurality of wavelength bands, i.e., light of a plurality of colors, in visible light can be reflected, not only for visible light of a certain color. At this time, the microcell 41 may appear white.
Under the irradiation of light rays with a first wavelength or a second wavelength, when cis-trans isomerism occurs to cis-trans isomerism molecules, the cholesteric liquid crystal molecules 411 are regularly arranged in a plane; while in a regular planar arrangement of cholesteric liquid crystal molecules 411, visible light is selectively reflected, i.e., in a color state, to appear in one color. Specifically: the pitch of the cholesteric liquid crystal can be affected by cis-trans isomerism, the wavelengths of light rays which can be reflected by the cholesteric liquid crystal with different pitches are different, so that visible light with different wavelengths can be selectively reflected, the degree of cis-trans isomerism molecules can be affected by illumination intensity, and the color of the light rays which can be reflected by the micro unit 41 can be affected by the illumination intensity. Therefore, the cis-trans isomerism process of cis-trans isomerism molecules can be controlled by adjusting the intensity of illumination, so that the pitch of cholesteric liquid crystal is controlled, the cholesteric liquid crystal can reflect light rays with specific wavelength in visible light, and the larger the pitch is, the larger the wavelength of the light rays which can be reflected is. Thus, the color of the light that can be reflected by the micro-cell 41 can be adjusted to form a plurality of color states, one color state can represent one color, and each color state is a reflection state. At the same time, the cis-trans isomerism is generated by the cis-trans isomerism material.
The above-mentioned regular planar arrangement means that the cholesteric liquid crystal molecules 411 and the cis-trans-isomer molecules 412 in the same microcell 41 are arranged at a predetermined period, and the irregular arrangement means non-periodic arrangement.
In some embodiments of the present disclosure, as shown in fig. 1, the first light reflecting state may include a plurality of the above-described color states, in each of which the micro-cell 41 may reflect a portion of visible light (e.g., one color of visible light) to exhibit one color, and in different color states, the micro-cell 41 exhibits different colors.
Any one of the specified intensities may be selected within the first specified intensity range, and illumination of the first wavelength at that specified intensity may cause the microcell 41 to be in one color state, and illumination of the first wavelength at a different specified intensity may cause the microcell 41 to be in a different color state, so that the color of the image may be set by setting the specified intensity. S in fig. 1 shows an irradiation region, which may reflect only a part of light, and thus may represent the color of the reflected light, whereas a non-irradiation region, i.e., a region other than the S region, may reflect visible light of each wavelength band, and thus may represent white.
Taking azobenzene as an example, the cis-trans isomerism material can generate cis-trans isomerism under the irradiation of ultraviolet light and visible light, specifically, as shown in fig. 1, after the irradiation of ultraviolet light with a first designated intensity, the trans-form is changed into cis-form, at this time, cholesteric liquid crystal molecules 411 can be regularly arranged in a plane, and the microcell 41 is in a first reflective state, i.e. a color state. As shown in fig. 2, when the cholesteric liquid crystal molecules 411 are irregularly arranged and in the second reflective state, the ambient light is scattered and white, at this time, after irradiation with visible light of the second specified intensity, the cis is changed to trans. Wherein the first wavelength may be 315nm to 395nm, e.g., 315nm, 36nm, 395nm, etc. The second wavelength may be 410nm-490nm, e.g., 410nm, 42nm, 490nm, etc. The first specified intensity range may be 5mw/cm 2 -35mw/cm 2 When the specified intensity is within a value within the specified intensity range, the micro-cell 41 may be in a color state. The second specified intensity range may be the same as the first specified intensity range, e.g., the second specified intensity range may also be 5mw/cm 2 -35mw/cm 2 Of course, the second specified intensity range may be different from the first specified intensity range.
Of course, in other embodiments of the present disclosure, the illumination intensity may be kept unchanged, and the alignment state of the cholesteric liquid crystal molecules 411 may be controlled by adjusting the magnitudes of the first wavelength and the second wavelength, so as to obtain each color state of the microcell 41. Alternatively, the arrangement state of the cholesteric liquid crystal molecules 411 may be controlled by adjusting the magnitudes of the first wavelength and the second wavelength and the intensity of the light at the same time, so that each color state of the microcell 41 is obtained.
Further, in some embodiments of the present disclosure, nematic liquid crystals may be included in microcell 41 in forming microcell 41. In order to facilitate the complete mixing of the cis-trans isomerism material and the cholesteric liquid crystal, nematic liquid crystal can be added, and as nematic liquid crystal molecules are small molecules, the viscosity is lower than that of the cis-trans isomerism material and the cholesteric liquid crystal, the viscosity is reduced, so that the mixing is uniform.
As shown in fig. 1-3, to facilitate defining the location of the microcells 41, in some embodiments of the present disclosure, the liquid crystal layer 4 may further include a defining layer 42 that may be disposed between the first substrate 1 and the second substrate 2 and within the area surrounded by the barrier dam 3, i.e., within the liquid crystal cell. The confining layer 42 has a plurality of mutually independent confining cavities 420, i.e. adjacent confining cavities 420 are not in communication, such that the orthographic projection arrays of each confining cavity 420 on the first substrate 1 are distributed and do not coincide with each other. The shape of the orthographic projection of the defining cavity 420 on the first substrate 1 may be rectangular or other polygonal shape, or may be other curved shape such as a circle, which is not particularly limited herein. The foregoing micro units 41 may be distributed in each of the defining cavities 420, and a plurality of micro units 41 may be disposed in each of the defining cavities 420, but the specific number is not particularly limited herein, that is, the micro units 41 may be embedded in the defining layer 42.
Further, the defining layer 42 may be a grid-like structure and extend along the extending direction of the surface of the first substrate 1 or the second substrate 2 near the liquid crystal layer 4. In some embodiments of the present disclosure, as shown in fig. 3, the grid-like structure defining the layer 42 may include a plurality of first retaining walls 421 and a plurality of second retaining walls 422, each of the first retaining walls 421 may extend in the first direction X and be distributed in the second direction Y; each second retaining wall 422 extends along the second direction Y and is distributed along the first direction X. Thus, the first retaining walls 421 and the second retaining walls 422 are disposed in a crossing manner, that is, each first retaining wall 421 crosses all the second retaining walls 422, each second retaining wall 422 crosses all the first retaining walls 421, thereby forming a net structure with a plurality of defining cavities 420, and two adjacent first retaining walls 421 and two adjacent second retaining walls 422 can enclose a defining cavity 420. In addition, the first and second retaining walls 421 and 422 may be connected to the blocking dam 3 at the ends, and may define the cavity 420.
In some embodiments of the present disclosure, the material defining layer 42 may include a photopolymerizable material so as to be curable by means of light. For example, the photopolymerizable material may comprise a polyacrylate that may be polymerized from at least one of the following monomers:
As shown in fig. 1-3, to further define the location of the microcell 41, a filler layer 43 may be disposed within the defined cavity 420, that is, the filler layer 43 is embedded within the defined layer 42. Meanwhile, the filling layer 43 has a plurality of mesh holes 430, the shape and size of the mesh holes 430 are not particularly limited herein, and the shape and size of different mesh holes 430 may be different. Microcells 41 may be distributed in each mesh 430. For example, each mesh 430 is provided with a micro unit 41, and the micro unit 41 is filled with cholesteric liquid crystal, cis-trans-isomer material, or the like in the space defined by the mesh 430.
In some embodiments of the present disclosure, the material of the filler layer 43 may include thermal polymerization so as to be formed by curing by means of heating. For example: the thermal polymerization of the filler layer 43 may include an epoxy. The epoxy resin can be polymerized from at least one of the following monomers:
/>
wherein ,can be->
In other embodiments of the present disclosure, the confining layer 42 may not be provided, and the filling layer 43 and the microcell 41 embedded in the filling layer 43 may be provided between the first substrate 1 and the second substrate 2.
In addition to the first reflective state and the second reflective state, the display device may have a transparent state, for example:
As shown in fig. 1 and 2, in some embodiments of the present disclosure, both the first substrate 1 and the second substrate 2 may be made transparent structures.
The first substrate 1 may include a first substrate 11 and a first electrode 12, wherein: the first substrate 11 may be a flat plate structure made of transparent material, and the first electrode 12 may be located on one side of the first substrate 11 near the barrier rib 3 and within a range surrounded by the barrier rib 3.
The second substrate 2 comprises a second substrate 21 and a second electrode 22, wherein: the second substrate 21 may be a flat plate structure made of transparent material, and the second electrode 22 may be located on one side of the second substrate 21 near the barrier rib 3 and within a range surrounded by the barrier rib 3. The liquid crystal layer 4 may be located between the first electrode 12 and the second electrode 22. By applying an electrical signal to the first electrode 12 and the second electrode 22, applying a voltage to the liquid crystal layer 4, the pitch of the cholesteric liquid crystal molecules is adjusted by controlling the voltage so as to adjust the wavelength of light that can be reflected by the cholesteric liquid crystal, and when the wavelength of light that can be reflected is greater than or less than the wavelength of visible light, it can transmit visible light, and the microcell 41 is in a transparent state, and no longer in a first reflective state or a second reflective state. Therefore, when the first electrode 12 and the second electrode 22 receive the prescribed electrical signal, the microcell 41 can be placed in the transparent state, and when the prescribed electrical signal is eliminated, the voltage applied to the microcell 41 by the first electrode 12 and the second electrode 22 is eliminated, and the microcell 41 can be restored to the second light-reflecting state, that is, the initial state. For example, the image may be written by illumination of a first wavelength and erased by illumination of a second wavelength to return to the original state, and the transparency may be achieved by the voltages of the first electrode 12 and the second electrode 22 and the original state may be returned by eliminating the voltages.
The specific electrical signals received by the first electrode 12 and the second electrode 22 are different, and the specific sizes thereof are not particularly limited, as long as the microcell 41 can be made transparent, and for example, a voltage of 50V or more can be applied to the microcell through the first electrode 12 and the second electrode 22.
The first reflective state and the second reflective state are reflective only to light of a specific wavelength, and do not mean that the transmittance to light of the specific wavelength is 100%. Meanwhile, the transparent state is transparent to visible light of each wavelength band, but does not mean that the transmittance to visible light is 100%. However, the transmittance of the first reflective state and the second reflective state for visible light is smaller than that of the transparent state.
Furthermore, a translucent layer may be provided on the side of the liquid crystal layer 4 facing away from the second substrate 2, which exhibits a single color, for example white. If the first and second light reflecting states are transparent to part of the visible light, the color of the translucent layer can be seen from the side of the second substrate 2 facing away from the first substrate 1, the color of which is used to define the color of the non-illuminated area, which is different from the color of the illuminated area S, for improving the uniformity of the area other than the color of the written image.
The present disclosure also provides a method for manufacturing a display device, where the display device may be any of the display devices described in the foregoing embodiments, and specific structures and beneficial effects thereof have been described in the foregoing embodiments of the display device, and are not described herein again. The manufacturing penalty of the present disclosure may include step S110-step S160, wherein:
step S110, forming a first substrate and a second substrate, wherein at least one of the first substrate and the second substrate is a transparent structure.
The specific structure of the first substrate and the second substrate may be referred to the embodiments of the display panel described above, and will not be described in detail herein.
The first substrate may be used as a base for forming the liquid crystal layer and is used for carrying a material for forming the liquid crystal layer. In order to define the position of the liquid crystal layer, a barrier rib may be formed on the first substrate, and the structure of the barrier rib may refer to an embodiment of the display device.
Step S120, preparing a mixture containing cholesteric liquid crystal, cis-trans isomerism material, photopolymerization monomer and thermal polymerization monomer; the cis-trans isomerism material can generate cis-trans isomerism under the illumination of a first wavelength range and a second wavelength range; the first wavelength and the second wavelength are different.
The cis-trans isomerism material, the photopolymerization monomer and the cholesteric liquid crystal can be mixed according to a certain mixing proportion to form a composite system, and the composite system is the first mixture. Specific numerical values of the compounding ratio are not particularly limited herein.
In some embodiments of the present disclosure, the cholesteric liquid crystal includes at least one of the following compounds:
in some embodiments of the present disclosure, the cis-trans isomerisable material may employ azobenzene, which may include at least one of the following compounds:
in some embodiments of the present disclosure, the photopolymerizable monomer may employ a liquid crystalline photopolymerizable monomer so as to be uniformly mixed with the cholesteric liquid crystal, and the photopolymerizable monomer may include at least one of the following compounds:
the thermally polymerized monomer may include an epoxy monomer, which may include at least one of the following compounds:
wherein ,is->
In some embodiments of the present disclosure, the mixture may be formed in multiple times, for example, step S120 may include step S1210 and step S1220, wherein:
step S1210, preparing a raw mixture comprising cholesteric liquid crystal, cis-trans isomerism material and photo-polymerization monomer.
Step S1220, preparing a mixture comprising said raw mixture and a thermally polymerized monomer.
Furthermore, in some embodiments of the present disclosure, the mixture may further include a nematic liquid crystal to reduce the viscosity of the first mixture.
Step S130, disposing the mixture on one side of the first substrate.
And step S140, irradiating the mixture by using a mask to solidify a partial area of the mixture, so as to form a limiting layer with a plurality of limiting cavities.
Since the mixture contains photopolymerizable monomers, which can be cured by irradiation to form a defined layer, irradiation can be performed only in a local area in order to form a defined cavity, and thus masking can be performed by using a mask, followed by irradiation. The illuminated area is the limiting layer, and the non-illuminated area can still be kept in a liquid state. The defining layer structure may refer to an embodiment of the display device, and will not be described herein.
Step S150, heating the mixture with the limiting layer to solidify part of the mixture in the limiting cavity, so as to form a filling layer with meshes; the mixture within the cell is a microcell comprising cholesteric liquid crystal and a cis-trans isomerising material; under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in the first light reflecting state; under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in the second light reflecting state; the first retroreflective state and the second retroreflective state exhibit different colors.
Since the mixture contains a thermally polymerized monomer, it can be cured by heating to form a filled layer defining the cavity, and since the cholesteric liquid crystal and the cis-trans-isomer material are not thermally polymerized materials, the mixture is not completely cured but forms a mesh in which the cholesteric liquid crystal and the cis-trans-isomer material are contained. The filling layer structure may refer to an embodiment of the display device, and will not be described herein.
Step S160, covering the second substrate on a side of the mixture facing away from the first substrate.
After the second base material and the first base material are paired, a liquid crystal box is formed, and the definition of the liquid crystal layer is realized.
It should be noted that the second substrate and the first substrate may be paired and then irradiated and heated, that is, step S160 may be located after step S130 and before step S140.
Before step 120, after step S110, a barrier dam is formed on one side of the first substrate, and the barrier dam may be a ring structure for forming a liquid crystal cell with the first substrate and the second substrate. The structure of the barrier dam may be referred to the embodiments of the display device described above and will not be described in detail herein.
The advantageous effects of the manufacturing method of the present disclosure may refer to embodiments of the display device and are not described in detail herein.
It should be noted that although the various steps of the methods of manufacture in the present disclosure are depicted in the drawings in a particular order, this does not require or imply that the steps must be performed in that particular order or that all of the illustrated steps be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.
As shown in fig. 4, the present disclosure further provides an electronic device, which may include the display apparatus 100 and the light emitting apparatus 200 of any of the above embodiments, wherein:
for the detailed structure of the display device 100, reference may be made to an embodiment of the display device 100.
The light emitting device 200 may be configured to emit at least one of light having a first wavelength with an illumination intensity within a first specified intensity range and light having a second wavelength with an illumination intensity within a second specified intensity range. The light emitting device 200 may be a light pen, a hand-held light, or other device.
In some embodiments of the present disclosure, the first substrate 1 and the second substrate 2 of the display device 100 are both transparent structures. The electronic device may further include a backlight module 300, which may be disposed on a side of the first substrate 1 facing away from the second substrate 2; the backlight module 300 can emit light with illumination intensity within a second specified intensity range to the first substrate 1. The backlight module 300 may include one or more light sources, and each light source may emit light at the same time.
The wavelength of light emitted by one of the light emitting device 200 and the backlight module 300 is a first wavelength, and the wavelength of light emitted by the other light emitting device is a second wavelength.
Since the first wavelength and the second wavelength can make the micro-units in different states, the light emitting device 200 irradiates a part of the display device 100 to form a specific image, and the backlight module 300 makes the states of the micro-units uniform to erase the image. Of course, if the light emitting device 200 can emit light of the first wavelength or emit light of the second wavelength with the illumination intensity within the second specified intensity range, writing and erasing can be performed by the light emitting device 200.
In some embodiments of the present disclosure, the light emitted by the backlight module 300 has a first wavelength, and the first wavelength is 315nm-395nm, which emits ultraviolet rays that may cause injury to a user after penetrating through the second substrate 2, so the electronic device further includes a filter layer disposed on a side of the second substrate 2 facing away from the second substrate 2 for filtering the light of the first wavelength, i.e. filtering the ultraviolet rays. Meanwhile, the light emitting device 200 may emit light of a second wavelength, which may be visible light. That is, erasing is performed by ultraviolet rays, and writing is performed by visible light.
Of course, in some embodiments of the present disclosure, the image may be written by ultraviolet rays, and the erasing may be performed by visible light, that is, if the backlight module 300 emits light with the second wavelength and the second wavelength is the visible light with the second wavelength of 410nm-490nm, no filter layer is required.
As shown in fig. 5, in some embodiments of the present disclosure, the light of the first wavelength whose illumination intensity is in the first specified intensity range and the light of the second wavelength whose illumination intensity is in the second specified intensity range of the light emitting device 200 emit only the light of the first wavelength or the second wavelength at the same time, so that an image can be generated using one of the first wavelength or the second wavelength, and the other is used for erasing. In this embodiment, the backlight module is not required.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (17)
1. A display device, comprising:
a first substrate;
a second substrate disposed opposite to the first substrate, at least one of the first substrate and the second substrate being a transparent structure;
a liquid crystal layer disposed between the first substrate and the second substrate; the liquid crystal layer comprises a plurality of micro units which are arranged in a dispersing way, the micro units comprise cholesteric liquid crystal and cis-trans-isomerism materials, the cis-trans-isomerism materials can generate cis-trans isomerism under the illumination of a first wavelength and a second wavelength, and the first wavelength and the second wavelength are different;
under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in a first light reflecting state;
under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in a second light reflecting state;
the first reflecting state and the second reflecting state are different in color;
the liquid crystal layer further includes:
a confining layer disposed between the first substrate and the second substrate; the limiting layer is provided with a plurality of mutually independent limiting cavities, and the micro units are distributed in each limiting cavity;
The material of the defining layer comprises a photopolymerizable material; the photopolymerized material comprises polyacrylate; the photopolymerisable material is polymerized by at least one of the following monomers:
2. the display device according to claim 1, wherein the defining layer is a mesh-like structure and extends along an extending direction of a surface of the first substrate or the second substrate near the liquid crystal layer.
3. The display device of claim 2, wherein the confining layer includes a plurality of first walls and a plurality of second walls, each of the first walls being extendable in a first direction and being distributed in a second direction, each of the second walls being extendable in the second direction and being distributed in the first direction; the first retaining wall and the second retaining wall are arranged in a crossing mode to define each limiting cavity.
4. The display device of claim 1, wherein the first light reflecting state comprises a plurality of color states, each of the color states in which the microcell reflects visible light to appear one color, and the color states in which the microcell appears different;
the first wavelength of illumination at a specified intensity within the first specified intensity range enables the microcell to be in one of the color states, and the first wavelength of illumination at a different of the specified intensities enables the microcell to be in a different of the color states.
5. The display device according to claim 1, wherein the first wavelength is 315nm to 395nm and the second wavelength is 410nm to 490nm; the first specified intensity range and the second specified intensity range are 5mw/cm 2 -35mw/cm 2 。
6. The display device according to claim 1, wherein the liquid crystal layer further comprises:
the filling layer is arranged between the first base material and the second base material, the filling layer is provided with a plurality of meshes, and the microcells are distributed in each mesh.
7. The display device of claim 6, wherein the filler layer comprises a thermally polymerized material.
8. The display device of claim 7, wherein the thermally polymerized material comprises an epoxy.
9. The display device according to claim 8, wherein the thermally polymerized material is polymerized from at least one of the following monomers:
wherein ,is->
10. The display device of claim 1, wherein the cis-trans isomerising material comprises azobenzene; the azobenzene comprises at least one of the following compounds:
11. the display device according to claim 1, wherein the cholesteric liquid crystal comprises at least one of the following compounds:
12. The display device of claim 1, wherein the microcell further comprises a nematic liquid crystal.
13. The display device according to any one of claims 1 to 12, wherein the first substrate and the second substrate are each a transparent structure;
the first base material comprises a first substrate and a first electrode positioned on one side of the first substrate close to the second base material;
the second substrate comprises a second substrate and a second electrode positioned on one side of the second substrate close to the first substrate.
14. A method of manufacturing a display device, comprising:
forming a first substrate and a second substrate, at least one of the first substrate and the second substrate being a transparent structure;
preparing a mixture comprising cholesteric liquid crystals, cis-trans isomerism materials, photo-polymerizable monomers and thermal polymerizable monomers; the cis-trans isomerism material can generate cis-trans isomerism under the illumination of a first wavelength range and a second wavelength range; the first wavelength and the second wavelength are different;
disposing the mixture on one side of the first substrate;
irradiating the mixture by using a mask to solidify a partial area of the mixture to form a limiting layer with a plurality of limiting cavities;
Heating the mixture with the limiting layer to cure part of the mixture in the limiting cavity to form a filling layer with meshes; the mixture within the cell is a microcell comprising cholesteric liquid crystal and a cis-trans isomerising material; under the illumination of the first wavelength with the illumination intensity in a first specified intensity range, the micro-unit is in a first light reflecting state; under the illumination of the second wavelength with the illumination intensity in a second designated intensity range, the micro unit is in a second light reflecting state; the first reflecting state and the second reflecting state are different in color;
covering the second substrate on the side of the mixture facing away from the first substrate;
the material of the defining layer comprises a photopolymerizable material; the photopolymerized material comprises polyacrylate; the photopolymerisable material is polymerized by at least one of the following monomers:
15. an electronic device, comprising:
the display device of any one of claims 1-13;
and the light-emitting device is used for emitting at least one of the light rays with the illumination intensity of the first wavelength in the first specified intensity range and the light rays with the illumination intensity of the second wavelength in the second specified intensity range.
16. The electronic device of claim 15, wherein the first substrate and the second substrate are both transparent structures;
the electronic device further includes:
the backlight module is arranged on one side of the first substrate, which is away from the second substrate; the backlight module is used for emitting one of light rays with illumination intensity of a first wavelength in the first specified intensity range and light rays with illumination intensity of a second wavelength in the second specified intensity range to the first substrate;
the light emitting device is capable of emitting at least the other of light of a first wavelength having an illumination intensity in the first specified intensity range and light of a second wavelength having an illumination intensity in the second specified intensity range.
17. The electronic device of claim 16, wherein if the wavelength of the light emitted by the backlight module is a first wavelength, the first wavelength is 315nm-395nm;
the electronic device further includes:
and the filter layer is arranged on one side of the second substrate, which is away from the second substrate, and is used for filtering out the light rays with the first wavelength.
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| KR20110111212A (en) * | 2010-04-02 | 2011-10-10 | 삼성전자주식회사 | Pixel electrode panel, liquid crystal display panel assembly and methods for manufacturing the same |
| KR20120066516A (en) * | 2010-12-14 | 2012-06-22 | 엘지디스플레이 주식회사 | Apparatus of manufacturing patterned retarder for stereoscopic 3d display and method of fabricating patterned retarder |
| CN106094384A (en) * | 2016-08-04 | 2016-11-09 | 合肥工业大学 | The red-green-blue-white light cholesteric liquid crystal device of light-operated reversible regulation and light control method thereof |
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