CN110082947B - Electro-optical transmittance changing structure and manufacturing method thereof - Google Patents
Electro-optical transmittance changing structure and manufacturing method thereof Download PDFInfo
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- CN110082947B CN110082947B CN201910276905.4A CN201910276905A CN110082947B CN 110082947 B CN110082947 B CN 110082947B CN 201910276905 A CN201910276905 A CN 201910276905A CN 110082947 B CN110082947 B CN 110082947B
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- 238000002834 transmittance Methods 0.000 title claims abstract description 64
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 229920000642 polymer Polymers 0.000 claims abstract description 114
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 claims abstract description 72
- 230000008859 change Effects 0.000 claims abstract description 36
- 239000004973 liquid crystal related substance Substances 0.000 claims description 59
- 239000000178 monomer Substances 0.000 claims description 43
- 239000000758 substrate Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 21
- 238000005401 electroluminescence Methods 0.000 claims description 15
- 230000000379 polymerizing effect Effects 0.000 claims description 12
- 230000001678 irradiating effect Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 9
- 230000005684 electric field Effects 0.000 description 18
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 10
- 239000010408 film Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 4
- 229920000106 Liquid crystal polymer Polymers 0.000 description 2
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 2
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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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
- G02F1/13—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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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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
- G02F1/13—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
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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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
- G02F1/13—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
- G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/13718—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
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Abstract
The application provides an electro-optical transmittance changing structure and a manufacturing method thereof. By the arrangement of the polymer network with the hole structure, when the electric transmittance change structure is not powered on, the inclination angle of the cholesteric liquid crystal which is closer to the polymer network is closer to the preset angle; when the electric light transmittance changing structure is powered on, the cholesteric liquid crystal close to the polymer transmits the toppling direction to the cholesteric liquid crystal far away, so that the purposes of reducing the driving voltage and saving the energy consumption are achieved.
Description
Technical Field
The application relates to an electro-optical transmittance changing film technology, in particular to an electro-optical transmittance changing structure and a manufacturing method thereof.
Background
Polymer-dispersed liquid crystal (PDLC) thin films are widely used for el films to realize transparent displays. The PDLC is prepared by forming porous polymer structure to make liquid crystal disperse in the pores homogeneously. When the power is not applied, the PDLC film can scatter light because the liquid crystal is inclined and has no direction, so that the PDLC film is in a light-tight state; when electricity is applied, the liquid crystal is deflected to be arranged in one direction, and the PDLC film transmits light.
However, the PDLC film has a disadvantage that a high driving voltage, often higher than 36 v, is required, which not only has a great potential safety hazard, but also increases energy consumption.
Disclosure of Invention
The embodiment of the application provides an electroluminescence transmissivity change structure and a manufacturing method thereof, and aims to solve the technical problems that an existing PDLC film is too high in required driving voltage, potential safety hazards exist and energy consumption is large.
The embodiment of the application provides an electro-optical transmittance change structure, which comprises
A first substrate;
the second substrate is arranged opposite to the first substrate and forms an accommodating cavity with the first substrate;
a hole structure disposed within the receiving cavity, the hole structure comprising a polymer network, the polymer network comprising a plurality of polymers, each polymer having a predetermined angle; and
cholesteric liquid crystal located in the hole structure;
when the electric transmittance changing structure is not electrified, the inclination angle of the cholesteric liquid crystal which is closer to the polymer network is closer to the preset angle; when the electric light transmittance changing structure is electrified, the cholesteric liquid crystal close to the polymer network transmits the toppling direction to the far cholesteric liquid crystal, and the purposes of reducing driving voltage and saving energy consumption are achieved.
In the structure of varying electro-transmissivity of the present application, the polymer is formed by polymerizing a liquid crystal type polymer monomer by a two-photon laser writing technique.
In the structure for changing the electro-transmissivity of the present application, the predetermined angle of each of the polymers is the same.
In the structure of varying the transmittance of electric field according to the present application, the preset angle is 90 °.
In the structure is changed to electric light transmissivity of this application, the hole structure still includes non-liquid crystal type polymer, non-liquid crystal type polymer is polymerized by non-liquid crystal type polymerization monomer and forms, non-liquid crystal type polymerization monomer with the polymer network passes through ultraviolet irradiation formation the hole structure.
The application also relates to a manufacturing method of the electro-optical transmittance change structure, which comprises the following steps:
providing an electric transmittance change basic structure, wherein the electric transmittance change basic structure comprises a first substrate, a second substrate, an accommodating cavity formed between the first substrate and the second substrate, and a liquid crystal type polymerized monomer, a non-liquid crystal type polymerized monomer and cholesteric liquid crystal which are positioned in the accommodating cavity;
setting a target angle of cholesteric liquid crystal;
polymerizing the liquid crystal type polymerized monomer to form a polymer with a preset angle, wherein the preset angle is consistent with the target angle, and a plurality of polymers form the polymer network;
and polymerizing the polymer network and the non-liquid crystal type polymerized monomer to form a hole structure, wherein the cholesteric liquid crystal is positioned in the hole structure to form the electro-optical transmittance change structure.
In the method for manufacturing an electro-transmissivity change structure of the present application, the polymerizing the liquid crystal type polymerized monomer to form a polymer having a preset angle, the preset angle is consistent with the target angle, and the forming of the polymer network by the plurality of polymers includes:
providing a two-photon writing device;
placing the electro-optic transmittance change base structure into the two-photon writing apparatus;
applying a voltage to the electroluminous transmittance change base structure;
adjusting the incidence direction of the laser of the two-photon writing equipment;
and irradiating the basic structure with the laser to ensure that the liquid crystal type polymerized monomers at the position irradiated by each beam of laser are polymerized to form a polymer with the preset angle, and a plurality of polymers form the polymer network.
In the method for manufacturing the structure with variable electro-transmissivity, the preset angle of each polymer is the same.
In the method for manufacturing an electro-luminescence transmittance change structure of the present application, the polymerizing the polymer network and the non-liquid crystal type polymerized monomer to form a hole structure includes:
and irradiating the polymer network and the non-liquid crystal type polymerized monomer by adopting ultraviolet rays, so that the non-liquid crystal type polymerized monomer is polymerized to form a non-liquid crystal type polymer, and the non-liquid crystal type polymer and the polymer network are polymerized to form the hole structure.
In the method for manufacturing the structure with variable electro-transmissivity, the incident direction of the laser is perpendicular to the plane of the basic structure with variable electro-transmissivity.
Compared with the prior art, the electroluminescent transmittance changing structure and the manufacturing method thereof have the advantages that through the arrangement of the polymer network with the hole structure, when the electroluminescent transmittance changing structure is not powered on, the inclination angle of the cholesteric liquid crystal closer to the polymer network is closer to the preset angle; when the electric light transmittance changing structure is powered on, the cholesteric liquid crystal close to the polymer transmits the toppling direction to the cholesteric liquid crystal far away, so that the purposes of reducing the driving voltage and saving the energy consumption are achieved; the technical problems that the driving voltage required by the conventional PDLC film is too high, potential safety hazards exist and energy consumption is large are solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required in the embodiments are briefly described below. The drawings in the following description are only some embodiments of the present application, and it will be obvious to those skilled in the art that other drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic structural diagram of an embodiment of an electro-luminescence transmittance change structure of the present application in an unpowered state;
FIG. 2 is a schematic diagram of an embodiment of an electro-luminescence transmittance change structure of the present application in an energized state;
FIG. 3 is a schematic diagram of the working structure of an embodiment of the basic structure for electro-transmissivity variation of the present application, which performs a two-photon laser writing technique;
FIG. 4 is a flowchart of an embodiment of a method for fabricating an electro-luminescence transmittance change structure according to the present application;
fig. 5 is another flowchart of an embodiment of a method for manufacturing an el structure according to the present application.
Detailed Description
Refer to the drawings wherein like reference numbers refer to like elements throughout. The following description is based on illustrated embodiments of the application and should not be taken as limiting the application with respect to other embodiments that are not detailed herein.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of an electroluminescence transmittance variation structure of the present application in an unpowered state; fig. 2 is a schematic structural diagram of an embodiment of an electroluminescence transmittance change structure of the present application in an energized state.
The electroluminescence transmittance change structure 100 of the embodiment of the present application includes a first substrate 11, a second substrate 12, a hole structure 13, and cholesteric liquid crystal 14.
Specifically, the second substrate 12 is disposed opposite to the first substrate 11 and forms an accommodating cavity 15 with the first substrate 11.
The hole structure 13 is arranged in the receiving cavity 15. The pore structure 13 comprises a polymer network. The polymer network includes a plurality of polymers 131. Meanwhile, each aggregate 131 has a predetermined angle. Wherein the predetermined angle is defined as an angle between the extending direction of the polymer 131 and the plane of the first substrate 11.
Cholesteric liquid crystals 14 are located in the hole structure 13.
When the electro-transmissivity variation structure 100 is not powered, the tilt angle of the cholesteric liquid crystal 14 closer to the polymer network is closer to the preset angle. When the electro-optic transmittance changing structure 100 is powered on, the cholesteric liquid crystal 14 close to the polymer network transfers the tilting direction to the cholesteric liquid crystal 14 far away, so as to achieve the purposes of reducing the driving voltage and saving the energy consumption.
The electro-optical transmittance changing structure 100 is energized, that is, a high enough electric field strength is applied to the electro-optical transmittance changing structure 100, so as to promote the helical structure of the cholesteric liquid crystal 14 to be disassembled, and the cholesteric liquid crystal 14 undergoes phase change and is finally converted into nematic liquid crystal which is uniformly arranged along the direction of the electric field.
The closer the tilt angle of the cholesteric liquid crystal 14 to the polymer network is to the predetermined angle, i.e., the closer the helical axis of the cholesteric liquid crystal 14 to the polymer network is to the direction of orientation of the polymer network.
When the orientation direction of the polymer network is the same as the direction of the electric field, the tilt direction of the cholesteric liquid crystal 14 closer to the polymer network is closer to the direction of the electric field under the condition of no electricity application, so that the cholesteric liquid crystal 14 closer to the polymer network has a tilt angle which is earlier closer to the direction of the electric field, and the cholesteric liquid crystal 14 can be driven to be turned without large electric field intensity.
In the el transmittance changing structure 100 of the present embodiment, when the inclination angle of the cholesteric liquid crystal 14 is a, the light having the incident angle of a can pass through the el transmittance changing structure 100. For example, when the tilt angle of the cholesteric liquid crystal 14 is 90 °, that is, the long axis of the cholesteric liquid crystal 14 is perpendicular to the plane of the first substrate 11, the light transmittance change structure 100 perpendicular to the plane of the first substrate 11 is realized.
The polymer network formed by the polymer 131 acts to align the cholesteric liquid crystal 14 so that the tilt angle of the cholesteric liquid crystal 14 closer to the polymer network is closer to the preset angle of the polymer network. Therefore, when a voltage is applied to the el transmittance changing structure 100, the cholesteric liquid crystal 14 has a tilt angle close to a target angle (an angle allowing light to pass through) in advance, so that a large voltage is not required to drive the cholesteric liquid crystal 14 to tilt and rotate, and the effect of reducing power consumption is achieved.
In the light transmission process of the present embodiment, the incident angle of the incident light passing through the electro-luminescence transmittance changing structure 100 needs to be set first; then, the aggregate 131 is formed to be identical to the incident angle, that is, the aggregate 131 is formed to have a predetermined angle equal to the incident angle. The polymer 131 is formed by polymerizing a liquid crystal type monomer through a two-photon laser writing technique, each laser beam can act to form a polymer 131, and the polymerization extension direction of the polymer 131 is consistent with the incident direction of the laser beam, i.e. the liquid crystal type monomer is polymerized along the incident direction of the laser beam. Therefore, referring to fig. 3, the embodiment is described by taking the laser to vertically irradiate the first substrate 11 as an example, but the invention is not limited thereto. Firstly, the basic structure of the change of the electric transmittance is placed on a substrate of the two-photon writing device, two-photon laser is started, the basic structure of the change of the electric transmittance is irradiated along the direction perpendicular to the plane of the first substrate 11, liquid crystal type polymerization monomers are induced to be arranged along the direction of the electric field force under the action of an electric field and polymerized, so that a plurality of polymers 131 are formed, and then a plurality of polymers 131 form a polymer network. The two-photon laser writing technique is used in this embodiment to cause the polymerized monomers to undergo directional polymerization to form the polymer 131. The incident direction of the laser beam has the effect of setting the alignment orientation between the polymers 131, so as to align the cholesteric liquid crystal 14.
In this embodiment, the predetermined angle of each polymer 131 is the same, such that the entire polymer network is arranged in a homeotropic arrangement to pass light rays having the same incident angle. Optionally, the preset angle is 90 °, and light perpendicular to the plane of the el transmittance changing structure 100 can be transmitted. The preset angle may be other, and may be set according to specific situations.
In the electroluminescence transmittance change structure 100 of the present embodiment, the hole structure 13 further includes a non-liquid crystal polymer 132. The non-liquid crystal type polymer 132 is polymerized from non-liquid crystal type polymerized monomers. Wherein the non-liquid crystal type polymeric monomer and the polymer network are irradiated by ultraviolet rays to form the pore structure 13. The hole structure 13 is used for accommodating cholesteric liquid crystals 14, and the dispersed cholesteric liquid crystals 14 are limited in the holes of the hole structure 13, so that a certain number of cholesteric liquid crystals 14 are uniformly distributed in the holes.
The non-liquid crystal type polymer 132 functions to support the first substrate 11 and the second substrate 12. Under the irradiation of ultraviolet rays, the non-liquid crystal type polymerized monomer is induced to polymerize and solidify, so as to form the non-liquid crystal type polymer 132, and the non-liquid crystal type polymer 132 is filled between the first substrate 11 and the second substrate 12, thereby achieving the function of supporting the first substrate 11 and the second substrate 12. I.e., the non-liquid crystal type polymer 132, improves the stability of the present embodiment.
Referring to fig. 4 and 5, fig. 4 is a flowchart illustrating an embodiment of a method for fabricating an electro-luminescence transmittance change structure according to the present application; fig. 5 is another flowchart of an embodiment of a method for manufacturing an el structure according to the present application. The method for manufacturing the electro-optical transmittance change structure 100 according to the embodiment of the present application includes:
s1: an electroluminescent transmittance changing base structure 10 is provided. The basic structure 10 for changing the electric transmissivity comprises a first substrate 11, a second substrate 12, a containing cavity 15 formed between the first substrate 11 and the second substrate 12, and a liquid crystal type polymerized monomer 1311, a non-liquid crystal type polymerized monomer 1321 and cholesteric liquid crystal 14 which are positioned in the containing cavity 15;
s2: setting a target angle of the cholesteric liquid crystal 14;
s3: polymerizing the liquid crystal type polymerized monomer 1311 to form a polymer 131 having a preset angle, the preset angle being identical to the target angle, the plurality of polymers 131 forming the polymer network;
s4: polymerizing the polymer network and the non-liquid crystal type polymerized monomer 1321 to form a hole structure 13, wherein the cholesteric liquid crystal 14 is positioned in the hole structure 13 to form the electro-optical transmittance change structure 100.
This embodiment allows the polymer network to act as an alignment for the cholesteric liquid crystal 14 by forming the polymer network. The preset angle of the polymer network coincides with the target angle of the cholesteric liquid crystal 14 (the angle through which light is allowed to pass), i.e. the tilt angle of the cholesteric liquid crystal 14 closer to the polymer network is urged closer to the target angle of the cholesteric liquid crystal 14. And then a smaller voltage is applied, the cholesteric liquid crystal 14 can complete the inversion to the target angle.
In the method for manufacturing the electroluminescence transmittance change structure 100 of the present embodiment, step S1: an electroluminescent transmittance changing base structure 10 is provided. The basic structure 10 for changing electro-transmissivity of light comprises a first substrate 11, a second substrate 12, a containing cavity 15 formed between the first substrate 11 and the second substrate 12, and a liquid crystal type polymerized monomer 1311, a non-liquid crystal type polymerized monomer 1321 and cholesteric liquid crystal 14 which are positioned in the containing cavity 15.
In step S2: the target angle of the cholesteric liquid crystal 14 is set.
Wherein the target angle of the cholesteric liquid crystal 14 depends on the direction of the electric field applied to the electro-transmissivity variation structure 100. Specifically, at a sufficiently strong electric field strength, the orientation direction of the cholesteric liquid crystal 14 coincides with the direction of the electric field.
In order to transmit light in this embodiment, the angle of incident light must be made to coincide with the target angle of the cholesteric liquid crystal 14. As described above, if the light beam with the incident angle a needs to transmit through the present embodiment, the target angle of the cholesteric liquid crystal 14 needs to be set to a, and the direction of the electric field also needs to satisfy the cholesteric liquid crystal 14 to achieve the target angle a.
In the present embodiment, it is required that the light perpendicular to the el transmittance changing structure 100 is transmitted through the el transmittance changing structure 100, and then it is required to set the target angle of the cholesteric liquid crystal 14 to 90 °, that is, after the electric field is applied, the orientation of the liquid crystal molecules of the cholesteric liquid crystal 14 is perpendicular to the el transmittance changing structure 100.
In step S3: the liquid crystal type polymerizable monomer 1311 is polymerized to form a polymer 131 having a predetermined angle, which is identical to the target angle, and a plurality of polymers 131 form a polymer network. Specifically, step S3 includes:
providing a two-photon writing device;
placing the electro-optic transmittance changing base structure 10 into a two-photon writing apparatus;
applying a voltage to the electro-optic transmittance change base structure 10;
adjusting the incident direction of laser of the two-photon writing equipment;
the basic structure 10 for changing electro-transmissivity is irradiated with laser light, so that the liquid crystal type polymerized monomer 1311 irradiated by each laser light is polymerized to form a polymer 131 with a predetermined angle, and a plurality of polymers form a polymer network.
Wherein the voltage is applied to the basic structure for variation of electro-transmissivity 10 in order to align the liquid crystal type polymerized monomers 1311 in the direction of the electric field under a sufficiently strong electric field strength to form the liquid crystal type polymerized monomers 1311 in a homeotropic structure.
Then, under the irradiation of a perpendicular laser (the incident direction of the laser is perpendicular to the plane of the basic structure for variation of electric transmittance 10, i.e. the incident angle is 90 °), the liquid crystal type polymerized monomer 1311 with a perpendicular structure is polymerized, and a polymer 131 with a perpendicular structure is formed. I.e., the preset angle of the aggregate 131 is 90 deg., so that the preset angle coincides with the target angle. And the plurality of polymers 131 form a polymer network.
Since the electro-transmissivity variation base structure 10 generates an electric field when a voltage is applied, the orientations of all the liquid crystal type polymerized monomers 1311 are uniform. The laser is also a vertical laser, so that the predetermined angle of each polymer 131 is the same and the same as the target angle.
The tilt angle of the cholesteric liquid crystal 14 closer to the polymer network is thus made closer to the target angle of the cholesteric liquid crystal 14 by the alignment of the polymer network to the cholesteric liquid crystal 14. And then a smaller voltage is applied, the cholesteric liquid crystal 14 can complete the inversion to the target angle.
In step S4: the polymer network and the non-liquid crystal type polymerizable monomer 1321 are polymerized to form the pore structure 13.
Wherein, ultraviolet rays are adopted to irradiate the polymer network and the non-liquid crystal type polymerized monomer 1321, so that the non-liquid crystal type polymerized monomer 1321 is polymerized to form the non-liquid crystal type polymer 132, and the non-liquid crystal type polymer 132 and the polymer network are polymerized to form the hole structure 13. The cholesteric liquid crystal 14 is dispersed in the accommodating cavity 15 and does not polymerize under the irradiation of ultraviolet rays, so that the hole structure 13 wraps the cholesteric liquid crystal 14. That is, the hole structure 13 divides the cholesteric liquid crystal 14 into a plurality of portions, each portion being correspondingly distributed in each hole of the hole structure 13. In addition, the non-liquid crystal polymer 132 functions to support the first substrate 11 and the second substrate 12.
This completes the process of fabricating the electroluminescence transmittance change structure 100 of the present embodiment.
Please refer to fig. 1 and fig. 2. When the electro-optic transmittance changing structure 100 is not powered, the inclination angle of the cholesteric liquid crystal 14 closer to the polymer network is closer to the preset angle; when the electro-transmissivity variation structure 100 is powered on, the cholesteric liquid crystal 14 close to the polymer transmits the tilting direction to the cholesteric liquid crystal 14 far away, the helical structure of the cholesteric liquid crystal 14 is disassembled, the cholesteric liquid crystal 14 is subjected to phase change and finally is converted into nematic liquid crystal which is uniformly arranged along the electric field direction, namely, the inclination angle of the cholesteric liquid crystal 14 is converted into a target angle.
Compared with the prior art, the electroluminescent transmittance changing structure and the manufacturing method thereof have the advantages that through the arrangement of the polymer network with the hole structure, when the electroluminescent transmittance changing structure is not powered on, the inclination angle of the cholesteric liquid crystal closer to the polymer network is closer to the preset angle; when the electric light transmittance changing structure is powered on, the cholesteric liquid crystal close to the polymer transmits the toppling direction to the cholesteric liquid crystal far away, so that the purposes of reducing the driving voltage and saving the energy consumption are achieved; the technical problems that the driving voltage required by the conventional PDLC film is too high, potential safety hazards exist and energy consumption is large are solved.
As described above, it will be apparent to those skilled in the art that various other changes and modifications can be made based on the technical solution and the technical idea of the present invention, and all such changes and modifications should fall within the protective scope of the appended claims.
Claims (6)
1. A method for manufacturing an electro-optical transmittance change structure is characterized by comprising the following steps:
providing an electric transmittance change basic structure, wherein the electric transmittance change basic structure comprises a first substrate, a second substrate, an accommodating cavity formed between the first substrate and the second substrate, and a liquid crystal type polymerized monomer, a non-liquid crystal type polymerized monomer and cholesteric liquid crystal which are positioned in the accommodating cavity;
setting a target angle of cholesteric liquid crystal;
polymerizing the liquid crystal type polymerized monomer to form a polymer with a preset angle, wherein the preset angle is consistent with the target angle, and a plurality of polymers form the polymer network;
and polymerizing the polymer network and the non-liquid crystal type polymerized monomer to form a hole structure, wherein the cholesteric liquid crystal is positioned in the hole structure to form the electro-optical transmittance change structure.
2. The method for manufacturing an electro-transmissivity variation structure of claim 1, wherein the polymerizing the liquid crystal type polymer monomer to form a polymer having a predetermined angle, the predetermined angle corresponding to the target angle, the plurality of polymers forming the polymer network comprises:
providing a two-photon writing device;
placing the electro-optic transmittance change base structure into the two-photon writing apparatus;
applying a voltage to the electroluminous transmittance change base structure;
adjusting the incidence direction of the laser of the two-photon writing equipment;
and irradiating the basic structure with the laser to ensure that the liquid crystal type polymerized monomers at the position irradiated by each beam of laser are polymerized to form a polymer with the preset angle, and a plurality of polymers form the polymer network.
3. The method of claim 2, wherein the predetermined angle of each polymer is the same.
4. The method for manufacturing an electro-luminescence transmittance change structure according to claim 2, wherein the polymerizing the polymer network and the non-liquid crystal type polymerized monomer to form a hole structure comprises:
and irradiating the polymer network and the non-liquid crystal type polymerized monomer by adopting ultraviolet rays, so that the non-liquid crystal type polymerized monomer is polymerized to form a non-liquid crystal type polymer, and the non-liquid crystal type polymer and the polymer network are polymerized to form the hole structure.
5. The method for manufacturing the structure with variable electro-transmissivity of claim 2, wherein the incident direction of the laser is perpendicular to the plane of the basic structure with variable electro-transmissivity.
6. The method for manufacturing an electro-luminescence transmittance change structure according to claim 1, wherein the predetermined angle is 90 °.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910276905.4A CN110082947B (en) | 2019-04-08 | 2019-04-08 | Electro-optical transmittance changing structure and manufacturing method thereof |
| PCT/CN2019/085971 WO2020206782A1 (en) | 2019-04-08 | 2019-05-08 | Electro-optical transmittance variation structure and manufacturing method therefor |
Applications Claiming Priority (1)
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| CN108663828A (en) * | 2017-03-27 | 2018-10-16 | 北京大学 | A kind of electric-controlled light-regulating film and preparation method thereof |
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| EP1693699A1 (en) * | 2005-02-16 | 2006-08-23 | SONY DEUTSCHLAND GmbH | A method of forming an array of polymer dispersed liquid crystal cells |
| CN101424820B (en) * | 2006-08-01 | 2010-09-01 | 友达光电股份有限公司 | Semi-penetrating semi-reflective liquid crystal display device |
| CN100545713C (en) * | 2008-04-29 | 2009-09-30 | 河北工业大学 | Polymer dispersed LCD bistable film and manufacture method thereof |
| JP6109472B2 (en) * | 2011-11-25 | 2017-04-05 | エルジー ディスプレイ カンパニー リミテッド | Liquid crystal display device and method of manufacturing liquid crystal display device |
| CN103412429B (en) * | 2013-07-26 | 2016-12-28 | 京东方科技集团股份有限公司 | A kind of preparation method of display panels |
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| CN110082947B (en) * | 2019-04-08 | 2020-10-13 | 深圳市华星光电技术有限公司 | Electro-optical transmittance changing structure and manufacturing method thereof |
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| CN105567256A (en) * | 2016-02-03 | 2016-05-11 | 京东方科技集团股份有限公司 | Liquid crystal composition, polymer dispersion liquid crystals, display panel and preparation method |
| CN108663828A (en) * | 2017-03-27 | 2018-10-16 | 北京大学 | A kind of electric-controlled light-regulating film and preparation method thereof |
| CN109280556A (en) * | 2018-10-26 | 2019-01-29 | 北京大学 | A method of polymer dispersed liquid-crystal film is prepared based on epoxy substep heat cure |
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