CN114545673A - Liquid crystal super-surface device for realizing wide color gamut reflection color modulation and preparation method thereof - Google Patents

Liquid crystal super-surface device for realizing wide color gamut reflection color modulation and preparation method thereof Download PDF

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CN114545673A
CN114545673A CN202210436656.2A CN202210436656A CN114545673A CN 114545673 A CN114545673 A CN 114545673A CN 202210436656 A CN202210436656 A CN 202210436656A CN 114545673 A CN114545673 A CN 114545673A
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liquid crystal
super
surface device
conductive glass
ito conductive
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CN114545673B (en
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霍德旺
李国强
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Zhejiang Lab
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Zhejiang Lab
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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
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133707—Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133773—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers the alignment material or treatment being different for the two opposite substrates

Abstract

The invention provides a liquid crystal super-surface device for realizing wide color gamut reflection color modulation and a preparation method thereof, wherein the liquid crystal super-surface device comprises the following steps: s1, preparing a plurality of optical super-surface devices; s2, spin-coating a liquid crystal photo-alignment film on the optical super-surface device and the conductive glass in the step S1, and aligning the photo-alignment film; s3, manufacturing a liquid crystal box by using the device and the conductive glass completed in the step S2, filling liquid crystal in the liquid crystal box, and preparing a liquid crystal modulation super-surface device to obtain an active liquid crystal modulation super-surface structure color device; and S4, placing the active liquid crystal modulation super-surface structure color device in an optical test light path, observing an optical image, and recording the image and the spectral information. The liquid crystal modulation super-surface device can solve the problem that the color gamut modulation range of the existing liquid crystal optical structure color device is small, can realize the color modulation of a wide color gamut by the design of realizing the wide color gamut reflection color modulation, and has the advantages of high spatial resolution and strong universality.

Description

Liquid crystal super-surface device for realizing wide color gamut reflection color modulation and preparation method thereof
Technical Field
The invention relates to the technical field of micro-nano optics, in particular to a liquid crystal super-surface device for realizing wide color gamut reflection color modulation and a preparation method thereof.
Background
The main principle of the optical super-surface device is to realize specific optical response by utilizing the interaction of a micro-nano structure and incident light waves. The main principle of the liquid crystal modulation super-surface device is to modulate the optical response of the optical super-surface device by utilizing the optical anisotropy and the electric driving characteristic of liquid crystal molecules, so as to generate modulation on color response, filtering effect and the like. When no voltage is applied, the orientation of the liquid crystal molecules is determined by the properties of the surface in contact with the liquid crystal; when a voltage is applied, the orientation of the liquid crystal molecules is determined by the electric field and the properties of the liquid crystal interface. Before and after voltage is applied, liquid crystal molecules are turned, corresponding refractive indexes are changed, and the polarization angle of light waves or the optical response of the super-surface device can be modulated.
The existing liquid crystal modulation super-surface device mostly utilizes the modulation effect of liquid crystal on the polarization angle of incident light, namely, the twisted nematic liquid crystal is adopted to modulate the polarization angle of the incident light, then the super-surface structure responds to the polarized light with different angles, the super-surface does not directly contact liquid crystal molecules, and for a structural color device, the method can only realize the mutual conversion between two colors. In addition, a small number of structural color devices modulate the super-surface device by utilizing refractive index change generated by orientation change of liquid crystal near the micro-nano structure, and the super-surface is in contact with the liquid crystal, so that the realized color gamut modulation range is smaller. In conclusion, the existing liquid crystal modulation super-surface structure color device has the defect of small color gamut modulation range, and the popularization of the liquid crystal modulation super-surface structure color device in practical application is limited.
Disclosure of Invention
The invention aims to provide a liquid crystal super-surface device for realizing wide color gamut reflection color modulation and a preparation method thereof, so as to increase the color gamut modulation range of the conventional liquid crystal modulation super-surface device and overcome the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the application discloses a liquid crystal super-surface device for realizing wide color gamut reflection color modulation, which comprises a liquid crystal box and liquid crystal filled in the liquid crystal box, wherein the liquid crystal box is composed of the super-surface device and ITO conductive glass as substrates, light orientation thin layers are arranged on the inner walls of the super-surface device and the ITO conductive glass, and the light orientation directions of the light orientation thin layers on the inner wall of the super-surface device and the ITO conductive glass are mutually vertical; and the substrate of the liquid crystal box is connected with a lead.
Preferably, the super-surface device comprises an ITO (indium tin oxide) conductive glass substrate, a transparent material thin layer and a micro-nano structure, wherein the transparent material thin layer is arranged on the top surface of the ITO conductive glass substrate, a plurality of micro-nano structures are arranged on the top surface of the transparent material thin layer, the micro-nano structure comprises a transparent material layer and a metal layer, the metal layer is arranged above the transparent material layer, the photo-orientation thin layer is arranged above the micro-nano structures, and the thickness of the transparent material layer is larger than that of the photo-orientation thin layer
Preferably, the material of the transparent material thin layer is SiO2Magnesium fluoride or PMMA, PDMS, etc.; the material of the transparent material layer is SiO2Magnesium fluoride or PMMA, PDMS, etc.; the metal layer is made of aluminum, gold, silver or the like.
Preferably, the material of the transparent material thin layer is SiO2(ii) a The material of the transparent material layer is SiO2The metal layer is made of aluminum, the thickness of the transparent material thin layer is 40nm, the thickness of the transparent material layer is 100nm, the thickness of the metal layer is 80nm, and the thickness of the optical orientation thin layer is 15 nm.
Preferably, the liquid crystal box is formed by bonding a super-surface device and ITO conductive glass through a mixture of silicon dioxide microspheres and ultraviolet curing optical cement.
Preferably, the liquid crystal adopts LCM1107 liquid crystal.
The application also discloses a preparation method of the liquid crystal super-surface device for realizing wide color gamut reflection color modulation, which specifically comprises the following steps:
s1, preparing a super-surface device;
s2, taking the ITO conductive glass and the super-surface device obtained in the step S1, respectively spin-coating a light orientation thin layer on the inner walls of the ITO conductive glass and the super-surface device, and carrying out orientation on the light orientation thin layer;
s3, taking the ITO conductive glass spin-coated with the optical orientation thin layer and the super-surface device in the step S2 as substrates, manufacturing a liquid crystal box, and filling liquid crystal in the liquid crystal box to obtain the liquid crystal super-surface device.
Preferably, step S1 specifically includes the following sub-steps:
s11, taking ITO conductive glass as a substrate, and cleaning the ITO conductive glass;
s12, preparing a micro-nano structure on the cleaned ITO conductive glass substrate.
Preferably, step S12 specifically includes the following sub-steps:
s121, depositing a transparent material on the ITO conductive glass substrate;
s122, depositing a metal material on the ITO conductive glass substrate which is subjected to the step S121;
s123, carrying out spin coating of photoresist on the ITO conductive glass substrate subjected to the step S122, and exposing by using electron beams;
s124, etching the ITO conductive glass substrate subjected to the step S123 by using photoresist;
s125, etching the ITO conductive glass substrate which is finished in the step S124 by using a metal material;
s126, etching the transparent material on the ITO conductive glass substrate which is subjected to the step S125;
and S127, removing residual photoresist on the ITO conductive glass substrate which is subjected to the step S126.
Preferably, the transparent material is SiO2Magnesium fluoride or PMMA, PDMS, etc., and the metal material is aluminum or gold, silver, etc.
Preferably, step S2 specifically includes the following sub-steps:
s21, preparing a photo-alignment solution and filtering;
s22, cleaning the ITO conductive glass and the super-surface device obtained in the step S1, and processing the ITO conductive glass and the super-surface device by using a plasma cleaning machine to form a hydrophilic surface;
s23, spin-coating the photo-alignment solution obtained in the step S21 on the ITO conductive glass and the super-surface device which are subjected to S22 to form a photo-alignment thin layer;
and S24, irradiating the ITO conductive glass and the super-surface device which are subjected to the step S23 by using polarized light to enable the light orientation thin layer to realize orientation.
Preferably, step S22 specifically includes the following operations: and (4) carrying out ultrasonic cleaning on the ITO conductive glass and the super-surface device obtained in the step S1 by sequentially using isopropanol, acetone, ethanol and deionized water, and then treating by using a plasma cleaning machine to form a hydrophilic surface.
Preferably, step S3 specifically includes the following sub-steps:
s31, mixing the silica microspheres with ultraviolet curing optical cement to form a mixture;
s32, bonding the edge of the super-surface device and the edge of the ITO glass together by using the mixture in S31 to form a liquid crystal box;
s33, injecting liquid crystal into the liquid crystal box made of the S32, and standing under a heating condition to obtain a liquid crystal super-surface device;
and S34, connecting leads on the two substrates of the liquid crystal super-surface device to be used as electrodes.
The invention has the beneficial effects that:
the invention relates to a liquid crystal super-surface device for realizing wide color gamut reflection color modulation, which realizes the color modulation of a wide color gamut by utilizing the modulation of twisted nematic liquid crystal on the polarization angle of light waves and the modulation of the refractive index of the liquid crystal near a super-surface; the liquid crystal photo-alignment thin layer is coated on the super-surface micro-nano structure, so that liquid crystal molecules form uniform alignment near the micro-nano structure, and meanwhile, the liquid crystal molecules can enter the space between the super-surface micro-nano structures. The orientation of the liquid crystal on the upper surface and the lower surface is vertical, twisted nematic liquid crystal is formed in the middle, most liquid crystal molecules in the middle of the liquid crystal box are uniformly oriented along the direction of an electric field under the condition of low voltage, and the voltage is increased to deflect the liquid crystal near the micro-nano structure so as to generate refractive index modulation; therefore, the design of the liquid crystal modulation super-surface device for realizing wide color gamut reflection color modulation can increase the color modulation range of the existing similar liquid crystal modulation device, has the advantage of large color gamut modulation range, and the method for realizing uniform orientation of liquid crystal by coating the micro-nano structure with the light orientation thin layer has the advantage of high universality and can be applied to various micro-nano structures.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic diagram of two structures of a liquid crystal modulation super-surface device in the prior art;
FIG. 2 is a schematic diagram of a liquid crystal modulation super-surface device according to the present invention for realizing wide color gamut color modulation;
FIG. 3 is a schematic structural diagram of a super-surface device in a liquid crystal modulation super-surface device according to the present invention;
FIG. 4 is a schematic view of the alignment of liquid crystal molecules before and after application of a voltage to the liquid crystal in the device of the present invention;
FIG. 5 is a device test light path diagram;
FIG. 6 is a reflection spectrum of a liquid crystal modulated super-surface structure color device under different applied voltage conditions;
FIG. 7 is a CIE1931 chromatogram representation of a liquid crystal modulated super-surface structure color device under different applied voltage conditions;
in the figure: the liquid crystal display panel comprises a 1-ITO conductive glass substrate, a 2-photo-alignment layer, 3-liquid crystal, a 4-micro-nano structure, a 41-transparent material thin layer, a 42-metal layer and a 43-transparent material layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Any liquid crystal modulation super-surface structure color device developed by replacing other liquid crystals and super-surface structures will infringe the patent of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention relates to a liquid crystal super-surface device for realizing wide color gamut reflection color modulation, which comprises a liquid crystal box and liquid crystal filled in the liquid crystal box, wherein the liquid crystal box is composed of the super-surface device and ITO conductive glass as substrates, light orientation thin layers are arranged on the inner walls of the super-surface device and the ITO conductive glass, and the light orientation directions of the light orientation thin layers on the inner wall of the super-surface device and the ITO conductive glass are mutually vertical; and the substrate of the liquid crystal box is connected with a lead. The liquid crystal is a liquid crystal material with larger optical anisotropy, and the liquid crystal super-surface device for realizing wide color gamut reflection color modulation can realize modulation on the reflection color of linearly polarized light.
In a feasible embodiment, the super-surface device comprises an ITO (indium tin oxide) conductive glass substrate, a transparent material thin layer and micro-nano structures, wherein the transparent material thin layer is arranged on the top surface of the ITO conductive glass substrate, a plurality of micro-nano structures are arranged on the top surface of the transparent material thin layer, the micro-nano structures comprise a transparent material layer and a metal layer, the metal layer is located above the transparent material layer, the photo-orientation thin layer is located above the micro-nano structures, and the thickness of the transparent material layer is larger than that of the photo-orientation thin layer.
The material of the transparent material thin layer is SiO2Magnesium fluoride or polymethylmethacrylate PMMA, polydimethylsiloxane PDMS, and the like; the material of the refraction material layer is SiO2Magnesium fluoride or PMMA, PDMS, etc.; the metal layer is made of aluminum, gold, silver or the like.
In a possible embodiment, the material of the thin transparent material layer is SiO2(ii) a The material of the transparent material layer is SiO2The metal layer is made of aluminum, the thickness of the transparent material thin layer is 40nm, the thickness of the transparent material layer is 100nm, the thickness of the metal layer is 80nm, and the thickness of the optical orientation thin layer is 15 nm.
In one possible embodiment, the liquid crystal cell is formed by bonding a super-surface device and ITO conductive glass through a mixture of silica microspheres and ultraviolet curing optical cement.
In one possible embodiment, the liquid crystal is LCM1107 liquid crystal.
A preparation method of a liquid crystal super-surface device for realizing wide color gamut reflection color modulation specifically comprises the following steps:
s1, preparing a super-surface device;
s2, taking the ITO conductive glass and the super-surface device in the step S1, respectively spin-coating a light orientation thin layer on the inner walls of the ITO conductive glass and the super-surface device, and carrying out orientation on the light orientation thin layer;
s3, taking the ITO conductive glass spin-coated with the optical orientation thin layer and the super-surface device in the step S2 as substrates, manufacturing a liquid crystal box, and filling liquid crystal in the liquid crystal box to obtain the liquid crystal super-surface device.
In a possible embodiment, step S1 specifically includes the following sub-steps:
s11, taking ITO conductive glass as a substrate, and cleaning the ITO conductive glass;
s12, preparing a micro-nano structure on the cleaned ITO conductive glass substrate.
In a possible embodiment, step S12 specifically includes the following sub-steps:
s121, depositing a transparent material on the ITO conductive glass substrate;
s122, depositing a metal material on the ITO conductive glass substrate which is subjected to the step S121;
s123, carrying out spin coating of photoresist on the ITO conductive glass substrate subjected to the step S122, and exposing by using electron beams;
s124, etching the ITO conductive glass substrate subjected to the step S123 by using photoresist;
s125, etching the ITO conductive glass substrate which is finished in the step S124 by using a metal material;
s126, etching the transparent material on the ITO conductive glass substrate which is subjected to the step S125;
and S127, removing residual photoresist on the ITO conductive glass substrate which is subjected to the step S126.
In one possible embodiment, the transparent material is SiO2Magnesium fluoride or PMMA, PDMS and the like, and the metal material is aluminum or gold, silver and the like
In a possible embodiment, step S2 specifically includes the following sub-steps:
s21, preparing a photo-alignment solution and filtering;
s22, cleaning the ITO conductive glass and the super-surface device obtained in the step S1, and processing the ITO conductive glass and the super-surface device by using a plasma cleaning machine to form a hydrophilic surface;
s23, spin-coating the photo-alignment solution obtained in the step S21 on the ITO conductive glass and the super-surface device which are subjected to S22 to form a photo-alignment thin layer;
s24, irradiating the ITO conductive glass and the super-surface device which are subjected to the step S23 by polarized light to enable the light orientation thin layer to be oriented.
In a possible embodiment, step S22 specifically includes the following operations: and (4) carrying out ultrasonic cleaning on the ITO conductive glass and the super-surface device obtained in the step S1 by sequentially using isopropanol, acetone, ethanol and deionized water, and then treating by using a plasma cleaning machine to form a hydrophilic surface.
In a possible embodiment, step S3 specifically includes the following sub-steps:
s31, mixing the silica microspheres with ultraviolet curing optical cement to form a mixture;
s32, bonding the edge of the super-surface device and the edge of the ITO glass together by using the mixture in S31 to form a liquid crystal box;
s33, injecting liquid crystal into the liquid crystal box made of S32, and standing under the heating condition to obtain a liquid crystal super-surface device;
and S34, connecting leads on the two substrates of the liquid crystal super-surface device to be used as electrodes.
The first embodiment is as follows:
the reflective wide color gamut color modulation is realized by utilizing a liquid crystal modulation super-surface device:
in the embodiment, the materials for preparing the super-surface micro-nano structure are aluminum and silicon dioxide, and the substrate is glass plated with an ITO thin layer. In the design, the liquid crystal used is LCM-1107, and the birefringence of the liquid crystal is 0.42. The liquid crystal is combined with the optical super-surface device to form a liquid crystal modulation super-surface structure color device. As shown in the left diagram of fig. 1, if only twisted nematic liquid crystal is used to modulate incident polarized light, and the super-surface micro-nano structure is not in contact with the liquid crystal, the color output range of the device is small, only the conversion between two colors can be realized, and full-color modulation cannot be realized in the same device. With only the structure shown in the right drawing of fig. 1, since the alignment of the liquid crystal is affected by the micro-nano structure, the micro-nano structure can only select a structure capable of uniformly aligning the liquid crystal, such as a grating, and the selection range and the color modulation range are small. Therefore, in this embodiment, the structure shown in fig. 2 is used, and the photo-alignment thin layer is added above the super-surface micro-nano structure, so that the photo-alignment thin layer can uniformly align the liquid crystal, and thus the super-surface micro-nano structure can be optimized to obtain wide color gamut color modulation. The specific implementation steps of the design are as follows:
the method comprises the following steps: and (4) preparing the super-surface optical device. Firstly, using acetone, ethanol and deionized water to carry out ultrasonic cleaning on ITO glass of a substrate for 10min in sequence, and then carrying out SiO treatment on the substrate2Depositing, wherein the thickness of the deposition is 140 nm; then, depositing metal aluminum with the deposition thickness of 80 nm; spin coating photoresist, and exposing with electron beam exposure system; next, etching the photoresist; etching the metal aluminum to the etching depth of 80 nm; then SiO is carried out2Etching to a depth of 100 nm; and finally removing the residual photoresist. Finally, through a series of micro-nano preparation processes, a schematic diagram of an optical super-surface micro-nano structure is prepared as shown in fig. 3, the left diagram is a schematic diagram of a micro-nano structure array, and the right diagram is a schematic diagram of a single micro-nano structure.
Step two: and (3) preparing a photo-oriented thin layer. First, a solution of a photo-alignment agent SD-1 was prepared in a concentration of 0.5 wt% in dimethylformamide as a solvent. And (3) ultrasonically cleaning the super-surface micro-nano structure and the ITO glass in the step one for 10min by sequentially using isopropanol, acetone, ethanol and deionized water, and then treating for 10min by using a plasma cleaning machine to form a hydrophilic surface. And then spin-coating the photo-orientation agent solution on the super-surface micro-nano structure and the ITO glass to form a photo-orientation thin layer. And irradiating the photo-alignment thin layer with 365nm polarized light to align the photo-alignment thin layer.
Step three: preparing a liquid crystal box and filling the liquid crystal. And (3) respectively taking the super-surface micro-nano structure and the ITO glass which are finished in the second step as two substrates of the liquid crystal box, and bonding the two substrates together by using a mixture of silicon dioxide microspheres and ultraviolet curing adhesive to form the liquid crystal box, wherein the optical orientation directions of the optical orientation layers on the two substrates are mutually vertical. The thickness of the cell is controlled by the size of the silica microspheres and the cell thickness is 6 microns. And (3) pouring LCM1107 liquid crystal into a liquid crystal box, and placing the liquid crystal box on a hot bench at 90 ℃ for 30min to ensure that the liquid crystal fully enters the liquid crystal box, especially gaps of the super-surface micro-nano structure. And connecting the wires to the ITO layers of the two substrates of the liquid crystal box respectively so as to apply voltage on the two sides of the liquid crystal box in the subsequent step. The orientation of the liquid crystal molecules during the application of the voltage changes as shown in fig. 4. When no voltage is applied, liquid crystal molecules are uniformly oriented on the surface of the micro-nano structure along the horizontal direction, and 90-degree twisted nematic liquid crystal is formed between two polar plates of the liquid crystal box. At the moment, the liquid crystal has the function of rotating the polarization direction for the incident linearly polarized light; when a low voltage is applied, liquid crystal molecules in the two polar plates are oriented along the z axis, the effect of the liquid crystal on rotating the polarization angle of the light wave disappears, and the liquid crystal can not rotate the polarization direction of incident light any more; when a high voltage is applied, liquid crystal molecules near the micro-nano structure are also turned, the refractive index near the micro-nano structure is changed, and the optical response is modulated accordingly.
Step four: and (4) building an optical test light path of the device. The diagram of the test light path of the device to be constructed according to the function of the device design is shown in fig. 5. The white light source with the color temperature of 6000K is collimated by a collimation system, then the light spot is reduced by a diaphragm, and then the light passes through a semi-transparent semi-reflecting mirror and is focused on a liquid crystal modulation super-surface optical device by a convex lens, and light waves are reflected by the liquid crystal modulation super-surface optical device and then enter a detector through a lens, the semi-transparent semi-reflecting mirror and the lens in sequence. The leads of the liquid crystal modulated super-surface optic are connected to two electrodes of a voltage source, respectively.
Step five: and testing the device. Firstly, the reflection spectrum of the liquid crystal modulation super-surface optical device is tested, a detector in an optical test light path of the device is a spectrometer, and the reflection spectrum is shown in fig. 6 under different applied voltage conditions. Assuming that the polarization of incident light is along the x direction, when no voltage is applied, the incident light reaching the micro-nano structure is y polarization; when voltage is applied, the rotation effect of the liquid crystal on the polarization angle of the light wave disappears, and the incident light reaching the micro-nano structure is x-polarized. With the continuous rise of the voltage, the orientation of the liquid crystal molecules near the lower surface is changed from the horizontal direction to the vertical direction, and the refractive index near the micro-nano structure is changed from neIs changed into noThe reflection peak in the reflection spectrum corresponding to x-polarization is shifted. And then the detector is replaced by a CCD, and the reflection color image of the device is measured under different applied voltage conditions. The color reflected by the device is in CIE1931 chromaticity diagram according to the change of the applied voltageThe trace on the red, green and blue light path is shown in fig. 7, and is firstly green, then blue, and finally red is gradually changed, and the red, green and blue main colors can be realized by adjusting the magnitude of the applied voltage. The area enclosed by each point in the chromaticity diagram is the adjustable color gamut area of the active structure color device, and the conclusion can be drawn from the diagram: the color modulation in the 54.8% sRGB range can be realized by using the liquid crystal modulation super-surface structure color device.
Example two:
in this embodiment, the materials for preparing the super-surface micro-nano structure are aluminum and magnesium fluoride, the substrate is glass coated with an ITO thin layer, and the super-surface optical device is prepared by: firstly, carrying out ultrasonic cleaning on ITO glass of a substrate for 10min by sequentially using acetone, ethanol and deionized water, and then carrying out magnesium fluoride deposition on the substrate; then depositing metal aluminum; spin coating photoresist, and exposing with electron beam exposure system; next, etching the photoresist; etching the metal aluminum; then etching magnesium fluoride; finally removing the residual photoresist; the remaining steps are the same as those in the first embodiment, and thus are not described in detail.
Example three:
in this embodiment, the material for preparing the super-surface micro-nano structure is gold and polymethyl methacrylate PMMA, and the substrate is ITO-coated glass, wherein the super-surface optical device is prepared by: firstly, carrying out ultrasonic cleaning on ITO glass of a substrate for 10min by sequentially using acetone, ethanol and deionized water, and then carrying out PMMA deposition on the substrate; subsequently, gold deposition is carried out; spin coating photoresist, and exposing by using an electron beam exposure system; next, etching the photoresist; etching the gold; then etching PMMA; finally removing the residual photoresist; the remaining steps are the same as those in the first embodiment, and thus are not described in detail.
Example four:
in this embodiment, the material for preparing the super-surface micro-nano structure is silver and polydimethylsiloxane PDMS, and the substrate is glass plated with an ITO thin layer, wherein the super-surface optical device is prepared by: firstly, carrying out ultrasonic cleaning on ITO glass of a substrate for 10min by sequentially using acetone, ethanol and deionized water, and then carrying out PDMS deposition on the substrate; subsequently carrying out silver deposition; spin coating photoresist, and exposing with electron beam exposure system; next, etching the photoresist; etching the silver; then etching PDMS; finally removing the residual photoresist; the remaining steps are the same as those in the first embodiment, and thus are not described in detail.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (13)

1. The utility model provides a realize super surface device of liquid crystal of wide colour gamut reflection color modulation, includes the liquid crystal box and pours into liquid crystal in the liquid crystal box, its characterized in that: the liquid crystal box is composed of a super-surface device and ITO conductive glass as substrates, wherein light orientation thin layers are arranged on the inner walls of the super-surface device and the ITO conductive glass, and the light orientation directions of the light orientation thin layers on the inner wall of the super-surface device and the ITO conductive glass are mutually vertical; and the substrate of the liquid crystal box is connected with a lead.
2. A liquid crystal super surface device for achieving wide gamut reflective color modulation as claimed in claim 1 wherein: the super-surface device comprises an ITO (indium tin oxide) conductive glass substrate, a transparent material thin layer and a micro-nano structure, wherein the transparent material thin layer is arranged on the top surface of the ITO conductive glass substrate, the micro-nano structure is arranged on the top surface of the transparent material thin layer and comprises a plurality of micro-nano structures, the metal layer is arranged above the transparent material layer, the photo-orientation thin layer is arranged above the micro-nano structure, and the thickness of the transparent material layer is larger than that of the photo-orientation thin layer.
3. A liquid crystal super surface device for achieving wide gamut reflective color modulation as claimed in claim 2 wherein: the material of the transparent material thin layer is SiO2Magnesium fluoride or PMMA, PDMS; the material of the transparent material layer is SiO2FluorineMagnesium oxide or PMMA, PDMS; the metal layer is made of aluminum or gold or silver.
4. A liquid crystal super surface device for achieving wide gamut reflective color modulation as claimed in claim 3 wherein: the material of the transparent material thin layer is SiO2(ii) a The material of the transparent material layer is SiO2The metal layer is made of aluminum, the thickness of the transparent material thin layer is 40nm, the thickness of the transparent material layer is 100nm, the thickness of the metal layer is 80nm, and the thickness of the optical orientation thin layer is 15 nm.
5. A liquid crystal super surface device for achieving wide gamut reflective color modulation as claimed in claim 1 wherein: the liquid crystal box is formed by bonding a super-surface device and ITO conductive glass through a mixture of silicon dioxide microspheres and ultraviolet curing optical cement.
6. A liquid crystal super surface device for achieving wide gamut reflective color modulation as claimed in claim 1 wherein: the liquid crystal adopts LCM1107 liquid crystal.
7. A preparation method of a liquid crystal super-surface device for realizing wide color gamut reflection color modulation is characterized by comprising the following steps: the method specifically comprises the following steps:
s1, preparing a super-surface device;
s2, taking the ITO conductive glass and the super-surface device in the step S1, respectively spin-coating a light orientation thin layer on the inner walls of the ITO conductive glass and the super-surface device, and carrying out orientation on the light orientation thin layer;
s3, taking the ITO conductive glass spin-coated with the optical orientation thin layer and the super-surface device in the step S2 as substrates, manufacturing a liquid crystal box, and filling liquid crystal in the liquid crystal box to obtain the liquid crystal super-surface device.
8. The method for manufacturing a liquid crystal super surface device capable of realizing wide color gamut reflection color modulation according to claim 7, wherein the step S1 specifically comprises the following sub-steps:
s11, taking ITO conductive glass as a substrate, and cleaning the ITO conductive glass;
s12, preparing a micro-nano structure on the cleaned ITO conductive glass substrate.
9. The method for manufacturing a liquid crystal super surface device capable of realizing wide color gamut reflection color modulation according to claim 7, wherein the step S12 specifically comprises the following sub-steps:
s121, depositing a transparent material on the ITO conductive glass substrate;
s122, depositing a metal material on the ITO conductive glass substrate which is subjected to the step S121;
s123, carrying out spin coating of photoresist on the ITO conductive glass substrate subjected to the step S122, and exposing by using electron beams;
s124, etching the ITO conductive glass substrate subjected to the step S123 by using photoresist;
s125, etching the ITO conductive glass substrate which is finished in the step S124 by using a metal material;
s126, etching the transparent material on the ITO conductive glass substrate which is subjected to the step S125;
and S127, removing residual photoresist on the ITO conductive glass substrate which is subjected to the step S126.
10. The method of claim 9, wherein the transparent material is SiO, and the transparent material is a liquid crystal super surface device with wide color gamut reflective color modulation2Magnesium fluoride or PMMA, PDMS, and the metal material is aluminum or gold, silver.
11. The method for manufacturing a liquid crystal super surface device capable of realizing wide color gamut reflection color modulation according to claim 7, wherein the step S2 specifically comprises the following sub-steps:
s21, preparing a photo-alignment solution and filtering;
s22, cleaning the ITO conductive glass and the super-surface device obtained in the step S1, and processing the ITO conductive glass and the super-surface device by using a plasma cleaning machine to form a hydrophilic surface;
s23, spin-coating the photo-alignment solution obtained in the step S21 on the ITO conductive glass and the super-surface device which are subjected to S22 to form a photo-alignment thin layer;
and S24, irradiating the ITO conductive glass and the super-surface device which are subjected to the step S23 by using polarized light to enable the light orientation thin layer to realize orientation.
12. The method for manufacturing a liquid crystal super surface device capable of realizing wide color gamut reflection color modulation according to claim 7, wherein the step S22 specifically comprises the following operations: and (4) carrying out ultrasonic cleaning on the ITO conductive glass and the super-surface device obtained in the step S1 by sequentially using isopropanol, acetone, ethanol and deionized water, and then treating by using a plasma cleaning machine to form a hydrophilic surface.
13. The method for manufacturing a liquid crystal super surface device capable of realizing wide color gamut reflection color modulation according to claim 7, wherein the step S3 specifically comprises the following sub-steps:
s31, mixing the silicon dioxide microspheres with ultraviolet curing optical cement to form a mixture;
s32, bonding the edge of the super-surface device and the edge of the ITO glass together by using the mixture in S31 to form a liquid crystal box;
s33, injecting liquid crystal into the liquid crystal box made of the S32, and standing under a heating condition to obtain a liquid crystal super-surface device;
and S34, connecting leads on the two substrates of the liquid crystal super-surface device to be used as electrodes.
CN202210436656.2A 2022-04-25 2022-04-25 Liquid crystal super-surface device for realizing wide color gamut reflection color modulation and preparation method thereof Active CN114545673B (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110310337A1 (en) * 2009-05-27 2011-12-22 Shoichi Ishihara Liquid crystal display device
US20180284509A1 (en) * 2017-04-04 2018-10-04 University Of Central Florida Research Foundation, Inc. Dynamically tunable, single pixel full-color plasmonic display, method and applications
CN108983457A (en) * 2018-08-10 2018-12-11 南方科技大学 A kind of liquid crystal color filter of colour tunable
CN110865475A (en) * 2020-01-20 2020-03-06 南京芯视元电子有限公司 Phase type spatial light modulator with high diffraction efficiency
CN112147817A (en) * 2020-10-30 2020-12-29 东南大学 Pure phase spatial light modulator based on super surface
CN112886261A (en) * 2021-01-12 2021-06-01 之江实验室 Adjustable multi-angle terahertz wave beam splitter and method thereof
WO2021104902A1 (en) * 2019-11-25 2021-06-03 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Electrically-controlled dynamic optical component comprising a planar metasurface
CN113375800A (en) * 2021-06-09 2021-09-10 浙江大学 Adjustable optical filter based on optical super-surface and spectral imaging system
CN114137772A (en) * 2021-11-17 2022-03-04 武汉大学 4 pi modulation range pure phase high resolution spatial light modulator

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110310337A1 (en) * 2009-05-27 2011-12-22 Shoichi Ishihara Liquid crystal display device
US20180284509A1 (en) * 2017-04-04 2018-10-04 University Of Central Florida Research Foundation, Inc. Dynamically tunable, single pixel full-color plasmonic display, method and applications
CN108983457A (en) * 2018-08-10 2018-12-11 南方科技大学 A kind of liquid crystal color filter of colour tunable
WO2021104902A1 (en) * 2019-11-25 2021-06-03 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Electrically-controlled dynamic optical component comprising a planar metasurface
CN110865475A (en) * 2020-01-20 2020-03-06 南京芯视元电子有限公司 Phase type spatial light modulator with high diffraction efficiency
CN112147817A (en) * 2020-10-30 2020-12-29 东南大学 Pure phase spatial light modulator based on super surface
CN112886261A (en) * 2021-01-12 2021-06-01 之江实验室 Adjustable multi-angle terahertz wave beam splitter and method thereof
CN113375800A (en) * 2021-06-09 2021-09-10 浙江大学 Adjustable optical filter based on optical super-surface and spectral imaging system
CN114137772A (en) * 2021-11-17 2022-03-04 武汉大学 4 pi modulation range pure phase high resolution spatial light modulator

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
余晓畅等: "可调微纳滤波结构的研究进展", 《中国光学》 *

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