CN101449203A - Liquid crystal devices - Google Patents

Liquid crystal devices Download PDF

Info

Publication number
CN101449203A
CN101449203A CNA2007800181166A CN200780018116A CN101449203A CN 101449203 A CN101449203 A CN 101449203A CN A2007800181166 A CNA2007800181166 A CN A2007800181166A CN 200780018116 A CN200780018116 A CN 200780018116A CN 101449203 A CN101449203 A CN 101449203A
Authority
CN
China
Prior art keywords
liquid crystal
conducting element
anisotropic particles
unit
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2007800181166A
Other languages
Chinese (zh)
Inventor
威廉·奥尔登·克罗斯兰
尼尔·科林斯
保尔·安德鲁·罗伯逊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cambridge Enterprise Ltd
Original Assignee
Cambridge Enterprise Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cambridge Enterprise Ltd filed Critical Cambridge Enterprise Ltd
Publication of CN101449203A publication Critical patent/CN101449203A/en
Pending legal-status Critical Current

Links

Images

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
    • G02F1/137—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
    • G02F1/13725—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 guest-host interaction
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/19—Phase-shifters using a ferromagnetic device
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/13—Function characteristic involving THZ radiation

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Nanotechnology (AREA)
  • Engineering & Computer Science (AREA)
  • Biophysics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mathematical Physics (AREA)
  • Liquid Crystal (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Waveguides (AREA)
  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention provides an electrical component comprising a substrate (30) carrying a LC cell (10) wherein the LC cell (10) comprises liquid crystal material (20) containing anisotropic particles (25), at least one conductive member (36) disposed on the substrate (30) and at least one conductive member (34) disposed over the LC cell (10), and means for affecting the alignment of the anisotropic particles (25) whereby the permittivity between the conductive members (34, 36) is varied.

Description

Liquid crystal device
The application relates to electric assembly, slab guide, antenna, beam-shaper (beam shaper) and electric tunable dielectric.
Embodiment is applicable to the zone of terahertz (terahertz) frequency or millimeter wavelength; Other embodiment are used for the zone of superfrequency (VHF), ultrahigh frequency (UHF) and microwave.
On the one hand, the invention provides a kind of electric assembly, comprise the substrate that is loaded with liquid crystal (LC) unit, wherein lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places conducting element (conductive member) on the substrate and at least one to place the conducting element of lc unit top; And be used to influence the device (means) that anisotropic particles is arranged (alignment), in order to change the permittivity (permittivity) between conducting element.
Said modules can be used for frequency sensitivity antenna (frequency agile antenna), steerable antenna (steerable antenna), tunable optic filter (tuneable filter), polarization variable antenna (polarisation variable antennas), voltage-controlled oscillator (voltage controlledoscillator), vairable delay line (variable delay line), automatic impedance match circuit (automaticimpedance matching circuit), be used for the active temperature compensation (activetemperature compensation for microwave circuits) of microwave circuit.
On the other hand, the invention provides a kind of slab guide, comprise the substrate that is loaded with lc unit, wherein lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the substrate to place the conducting element of lc unit top with at least one; And the device that is used to influence the arrangement of anisotropic particles, to change the permittivity between conducting element.
Another aspect the invention provides a kind of antenna, comprises the substrate that is loaded with lc unit, and wherein lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the substrate to place the conducting element of lc unit top with at least one; And the device that is used to influence the arrangement of anisotropic particles, to change the permittivity between conducting element.
Again on the one hand, the invention provides the beam-shaper that a kind of free space that is used for the terahertz frequency wave is propagated, comprise the substrate that is loaded with lc unit, wherein lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the substrate to place the conducting element of lc unit top with at least one; And the device that is used to influence the arrangement of anisotropic particles, to change the permittivity between conducting element.
The device that is used to influence arrangement can comprise conducting element.
On the one hand, the invention provides a kind of electric tunable dielectric again, comprise lc unit, wherein lc unit comprises the liquid crystal material that contains anisotropic particles; And the control electrode that is used to influence the arrangement of anisotropic particles.
Lc unit can comprise polymer dispersed formula liquid crystal (PDLC, i.e. Polymer Dispersed LiquidCrystal) material.
Anisotropic particles can comprise carbon nano-tube (CNT).
With reference to hereinafter describing and will more being expressly understood the present invention, wherein in conjunction with annexed drawings:
Fig. 1 a is the synoptic diagram of liquid crystal cells, is illustrated in the anisotropic particles under " field-free " condition;
Fig. 1 b is the synoptic diagram of liquid crystal cells, is illustrated in the anisotropic particles under " field is arranged " condition;
Fig. 2 is the sectional view of test cell;
Fig. 3 is the skeleton view of the paster antenna (patch antenna) in the embodiment of the invention;
Fig. 4 is the sectional view of III-III ' along the line among Fig. 2;
Fig. 5 is the sectional view that passes strip line (stripline) waveguide in the embodiment of the invention;
Fig. 6 is the synoptic diagram of the beam-shaper in the embodiment of the invention.
Referring to Fig. 1 a and Fig. 1 b, liquid crystal cells 10 has liquid crystal material layer 20, has (dispersed) anisotropic particles 25 of distribution in the described liquid crystal material layer 20.In described embodiment, these particles are CNT.In another embodiment, adopt dyeing (dye) impurity in the described liquid crystal material layer 20.In another embodiment, liquid crystal material is not for containing the PDLC material of CNT.By relative, be generally the scope that glass substrate 30,32 flat and that be parallel to each other limits liquid crystal material 20, wherein glass substrate 30,32 is loaded with indium tin oxide (ITO) electrode 34,36, and by distance piece (spacer) 33,35 substrate is separated.Come connection electrode by conductor 37,38.
Distance s between the substrate is in fact less than the length e of substrate.
In Fig. 1 a, general liquid crystal material 20 makes anisotropic particles 25 be parallel to substrate and arranges.
In Fig. 1 b, therefore applied field between ITO electrode 34,36 causing the molecule tilt of liquid crystal material 20, and guides particle 25 to enter position of rotation, and at this, described position of rotation is with respect to about average out to 35 degree in the plane of substrate.Described 35 degree angles are not the essential feature of described device.The change that anisotropic particles is arranged causes the variation of permittivity between the ITO electrode 34,36.
By people such as K C Lim " liquid crystal 14 (1993) 327-337 pages or leaves " as can be known, the birefringence scope of commercial liquid crystal in the millimeter wave zone is the 46%-67% of visible area thresholding.In addition, by people such as Weil " electronic letter 39 (24) 1732-4 (2003) " as can be known, synthesize conventional liquid crystal, and the loss of the tangent δ in mm ripple zone is similar to FR4 by the dielectric anisotropy (enhanced dielectric anisotropy) (Δ ε=1) that strengthens.
When test device constructed in accordance,, adopt multiple material system to make liquid crystal layer based on to row nucleus (nematic host) and carbon nano-tube material.Make suitable material by mixing carbon nano-tube and liquid crystal.Potpourri after injecting is passed through sonicated (sonication), so that carbon nano-tube is scattered in liquid crystal.
Referring to Fig. 2, have supporting substrate 401 than the test cell 400 of existing test cell thick (can the thick 1mm of reaching), described supporting substrate 401 is used to support the copper ground plane (groundplane) 410 that extends to its upper surface.Liquid crystal material layer 420 is placed on the ground plane, and support overlayer 430 with the definition liquid crystal cells by distance piece 435.In other unit, adopt polymkeric substance to replace glass.Top electrode 440 is made of copper, for example is made of little band copper path (microstrip copper track).The width of top electrode 440 is that the thickness of w and lc unit is h, to pass through z o～h/[(w+2h) ε oc oε r 1/2] and electrical length β L～2pL/ λ g(λ wherein g=c o/ [f ε r 1/2]) determine the characteristic impedance Z of microstrip transmission line o, the very part of microstrip transmission line wherein powers on.
For electricity conversion liquid crystal and the described device of adjusting, the liquid crystal with following feature is adopted in suggestion:
Birefringence through electric control; And
Bifrequency is to row.
In one embodiment, because the previous work that anisotropy metal microtubule is dispersed in the liquid crystal nucleus shows, distribution by 0.2%, can increase the birefringence that is in the liquid crystal of 30GHz more than 50% (referring to people's such as AM Lackner " liquid crystal 14 (1993); 351-359 page or leaf "), therefore can adopt liquid crystal nucleus doped carbon nanometer pipe (CNT), to enlarge tuning range.
Also very important for other application of the CNT polymkeric substance with liquid crystal or polymkeric substance or activated monomer (reactivemonomer) at CNT orderly in the organic media, these other application examples are as can be used as the conducting polymer that is used for holograph or optical nonlinearity material etc.
In order to maximize dielectric anisotropy, the essential acquisition preferably and stable CNT arrangement.CNT functionalization technology (Functionalisationtechniques) in organic media (for example comprising liquid crystal and activated monomer), be used to chemical modification (functionalization of covalent bond (covalent functionalisation)), polymer encapsulated (functionalization of non-covalent bond (noncovalent functionalisation)), and be used for the surfactant of organic media.Other problems comprises the understanding for the concrete spectrum property of absorption characteristic and dielectric characteristic.
Predictably, the electric-optical appliance by these made can be used for controlling radiation (for example in imaging of medical), in antenna, radio and the radar application categories such as (for example artificial satellite and mobile phones) that in microwave, is suitable for.
Predicted the application of LCs (being mixed with or not being mixed with CNT) on realization " solid-state (solid) " substrate (making microwave circuit on this substrate) that polymer dispersed is arranged by embodiment, should be similar to existing P TFE and glass fibre substrate by " solid-state " substrate, this application is applicable to little band (microstrip), strip line (stripline), the line of rabbet joint (slotline) and other slab guide technology.Compare with the structure of employing LC " unit " type that is proposed, this mode can be simplified the manufacturing of microwave circuit, and its cost is to have dwindled tuning range.In some cases, preferably limited tuning range for example is used for the fine tuning of oscillator.
Steerable antenna (steerable antenna) is the embodiment that is used for radio LAN and/or mobile phone, for example in order to obtain higher customer density in the given area.For phone, steerable antenna allows the user to reduce radiation irradiation (radiation exposure).The non-finiteness example of other of application of the present invention is little band and strip-line circuit (microstrip ﹠amp; Stripline circuits), phase-shifter (phaseshifters), match circuit (matching circuits), tunable and controlled paster antenna (tuneableand steerable patch antennas), wave filter and circulator (circulators) etc.
Referring to Fig. 3 and Fig. 4, paster antenna 100 has dielectric base plate 110, and the upper end of described dielectric base plate 110 (upperside) has copper electrode 114.Liquid crystal cells 120 is placed on the upper end of substrate 110 and place copper electrode 114 tops.Limited by distance piece 124 around the border of described liquid crystal cells 120, described distance piece 124 is made of the glue envelope (glue seal) that is loaded with iron particle.In this embodiment, liquid crystal material 128 forms active material, and comprises the CNT that adopts Merck BL037 and scatter.
It on the top of liquid crystal cells (top) copper electrode 122 that forms paster.Described electrode 122 has suitable thickness, minimizes to make conduction loss (conduction losses) on operating frequency, thereby obtains acceptable Q factor.
Bonding conductor 140 can input to energy paster 122 or extract energy from paster 122.
Adopt iron particle to form magnetic field boundaries, thereby help to reduce to crosstalk (crosstalk).High frequency (for example kilo-mega cycles per second) signal is applied to paster 122, and applies (for example direct current) bias voltage of lower frequency, the permittivity of the LC 128 that mixes with control CNT.Bias voltage can be actual direct current or low frequency transformation, and what need careful note is that reaction time of LC material is Millisecond.
Referring to Fig. 5, on dielectric base plate 210, form first waveguide or transmission line 220, described dielectric base plate 210 upper ends have ground plane (earth plane) 214, and form ground plane by copper conductor 226.The LC material 228 that CNT mixes forms the unit, the side of this unit limits its border by distance piece 224, then limit on it by upper substrate 218, the top of CNT doping LC material 228 formed unit, wherein said substrate 218 supports the copper cash electrode 222 that is positioned on its inside.
Described operation is similar to the operation among first embodiment substantially.
Fig. 6 illustrates the embodiment of second transmission line.In this embodiment, the upper surface and the lower surface of line electrode 222 are limited by liquid crystal material, and this line electrode 222 is between two ground planes 220,224.Other waveguides and similar structures can have been predicted.
Referring to Fig. 7, beam-shaper 300 is made up of paster antenna electrode 310 square matrices of routine, and these paster antenna electrodes 310 are spaced from each other in a plane, and are positioned at the top of base plate 301.In certain embodiments, only need the antenna element of minority, for example 4 or 5 elements.
Fig. 8 shows the substituting setting to Fig. 1, and this set can be used when adopting the bifrequency material.Described situation about illustrating when only applying the low frequency field and only applying high-frequency field (reaction time than liquid crystal material is a lot of soon).
In Fig. 8 a, anisotropic particles 25 is arranged in the mode that is basically perpendicular to glass substrate 30,32, and wherein glass substrate 30,32 is parallel to each other.This arrangement mode causes by apply low-frequency current field between ITO electrode 34,36.This approximately perpendicular arrangement mode is pure illustrative.
In Fig. 8 b, anisotropic particles 25 is arranged in the mode that is basically parallel to glass substrate 30,32, and wherein glass substrate 30,32 is parallel to each other.This arrangement mode causes by apply high-frequency electric field between ITO electrode 34,36.
The liquid crystal cells that oneself is all arranged under each patch electrode 310 in one embodiment; In another slightly inferior optimal way, provide single liquid crystal cells.By conductor 304a-304d signal and bias voltage are fed back to each patch electrode.By bias voltage the permittivity value of each paster is set, so that in known mode, change signal distributions (signal distribution) and guiding radiation laser beam.
Embodiments of the invention have above been described.Yet the present invention is not limited to the details of the foregoing description.

Claims (8)

1. an electric assembly comprises the substrate that is loaded with lc unit, and wherein said lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the described substrate to place the conducting element of described lc unit top with at least one; And the device that is used to influence the arrangement of anisotropic particles, to change the permittivity between described conducting element.
2. a slab guide comprises the substrate that is loaded with lc unit, and wherein said lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the described substrate to place the conducting element of described lc unit top with at least one; And the device that is used to influence the arrangement of described anisotropic particles, to change the permittivity between described conducting element.
3. an antenna comprises the substrate that is loaded with lc unit, and wherein said lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the described substrate to place the conducting element of described lc unit top with at least one; And the device that is used to influence the arrangement of described anisotropic particles, to change the permittivity between described conducting element.
4. a beam-shaper is used for the free space propagation of terahertz frequency wave, and this beam-shaper comprises the substrate that is loaded with lc unit, and wherein said lc unit comprises the liquid crystal material that contains anisotropic particles; Comprise that also at least one places the conducting element on the described substrate to place the conducting element of described lc unit top with at least one; And the device that is used to influence the arrangement of described anisotropic particles, to change the permittivity between described conducting element.
5. an electric tunable dielectric comprises lc unit, and wherein said lc unit comprises the liquid crystal material that contains anisotropic particles; The control electrode that also comprises the arrangement that is used to influence described anisotropic particles.
6. electric assembly according to claim 1, slab guide according to claim 2, antenna according to claim 3 or beam-shaper according to claim 4, the described device that wherein is used to influence the arrangement of described anisotropic particles comprises described conducting element.
7. electric assembly according to claim 1, slab guide according to claim 2, antenna according to claim 3, beam-shaper according to claim 4 or electric tunable dielectric according to claim 5, wherein said lc unit comprises the PDLC material.
8. electric assembly according to claim 1, slab guide according to claim 2, antenna according to claim 3, beam-shaper according to claim 4 or electric tunable dielectric according to claim 5, wherein said anisotropic particles comprises CNT.
CNA2007800181166A 2006-04-24 2007-04-24 Liquid crystal devices Pending CN101449203A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0608055.0 2006-04-24
GBGB0608055.0A GB0608055D0 (en) 2006-04-24 2006-04-24 Liquid crystal devices

Publications (1)

Publication Number Publication Date
CN101449203A true CN101449203A (en) 2009-06-03

Family

ID=36581133

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007800181166A Pending CN101449203A (en) 2006-04-24 2007-04-24 Liquid crystal devices

Country Status (8)

Country Link
EP (1) EP2016459A1 (en)
JP (1) JP2009534974A (en)
KR (1) KR20090057940A (en)
CN (1) CN101449203A (en)
BR (1) BRPI0710770A2 (en)
GB (1) GB0608055D0 (en)
TW (1) TW200801758A (en)
WO (1) WO2007122409A1 (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102645777A (en) * 2011-12-13 2012-08-22 北京京东方光电科技有限公司 Liquid crystal panel manufacturing method, liquid crystal panel and display
CN103364982A (en) * 2012-04-11 2013-10-23 群康科技(深圳)有限公司 Display device
WO2014154011A1 (en) * 2013-03-28 2014-10-02 京东方科技集团股份有限公司 Blue-phase liquid crystal composite material and liquid crystal display comprising material
WO2014176717A1 (en) * 2013-04-28 2014-11-06 East China University Of Science And Technology Polymer-stabilized dual frequency blue phase liquid crystals
WO2014183389A1 (en) * 2013-05-13 2014-11-20 北京京东方光电科技有限公司 Method for stabilizing crystal structure of blue-phase liquid crystal, display apparatus, and manufacturing method
CN104466307A (en) * 2014-11-24 2015-03-25 电子科技大学 Phase shifter
CN106054441A (en) * 2016-08-12 2016-10-26 京东方科技集团股份有限公司 Polarizing device, drive method thereof and display device
CN102645777B (en) * 2011-12-13 2016-12-14 北京京东方光电科技有限公司 A kind of liquid crystal panel manufacture method, liquid crystal panel and display
CN108270070A (en) * 2017-01-03 2018-07-10 中兴通讯股份有限公司 A kind of liquid antenna structure and its control method
CN108281737A (en) * 2018-01-23 2018-07-13 中国计量大学 A kind of highly transmissive type Terahertz phase shifter based on Meta Materials
CN108511858A (en) * 2018-04-13 2018-09-07 京东方科技集团股份有限公司 A kind of liquid crystal phase shifter and electronic equipment
CN109216886A (en) * 2017-07-06 2019-01-15 群创光电股份有限公司 Radiation appliance
CN110943300A (en) * 2018-09-25 2020-03-31 夏普株式会社 Scanning antenna and TFT substrate
CN113258305A (en) * 2021-04-30 2021-08-13 西南电子技术研究所（中国电子科技集团公司第十研究所） Method for preparing high-frequency liquid crystal radiation area subarray of electric control holographic antenna
CN114879424A (en) * 2022-04-25 2022-08-09 长春理工大学 Electric control liquid crystal nonlinear optical device based on multilayer composite structure and preparation method and application thereof
KR20240047083A (en) 2022-10-04 2024-04-12 서울대학교산학협력단 Intelligent antennas based on solar cell fabrication process and manufacturing method thereof

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008024795A1 (en) * 2008-05-23 2009-11-26 Deutsche Telekom Ag Method for controlling electromagnetic terahertz carrier waves
CN102385187B (en) * 2010-09-06 2013-12-11 北京众智同辉科技有限公司 Composite electro-liquid-crystal atomized glass and making method thereof
TWI453500B (en) * 2011-08-16 2014-09-21 Chunghwa Picture Tubes Ltd Liquid crystal test cell and manufacturing method thereof
EP2757630A1 (en) 2013-01-16 2014-07-23 Alcatel Lucent Transmission device
DE102016107955A1 (en) * 2016-04-28 2017-11-02 Tesat-Spacecom Gmbh & Co. Kg Resonator and filter with resonator
US10720712B2 (en) * 2016-09-22 2020-07-21 Huawei Technologies Co., Ltd. Liquid-crystal tunable metasurface for beam steering antennas
CN108321503B (en) * 2017-01-16 2020-05-15 群创光电股份有限公司 Liquid crystal antenna device
WO2020189451A1 (en) * 2019-03-15 2020-09-24 Ａｇｃ株式会社 Antenna device, electronic device, window glass, and movable body
CN114284714B (en) * 2021-12-31 2023-12-15 成都天马微电子有限公司 Liquid crystal antenna and preparation method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0472404A3 (en) * 1990-08-24 1993-03-03 Hughes Aircraft Company Liquid crystal-based composite material having enhanced microwave birefringence
US5184233A (en) * 1990-08-24 1993-02-02 Hughes Aircraft Company Liquid crystal-based composite material including electrically conducting elongated particles and having enhanced microwave birefringence
US5093740A (en) * 1991-02-28 1992-03-03 Raytheon Company Optical beam steerer having subaperture addressing
JP3874964B2 (en) * 1999-04-28 2007-01-31 日本放送協会 Variable phase shifter
JP2000341027A (en) * 1999-05-27 2000-12-08 Nippon Hoso Kyokai <Nhk> Patch antenna system
US7119161B2 (en) * 2004-03-31 2006-10-10 Solaris Nanosciences, Inc. Anisotropic nanoparticles and anisotropic nanostructures and pixels, displays and inks using them
JP2006292970A (en) * 2005-04-08 2006-10-26 Nano Opt Kenkyusho:Kk Liquid crystal electro-optical element and method for stabilizing temperature characteristics thereof

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102645777A (en) * 2011-12-13 2012-08-22 北京京东方光电科技有限公司 Liquid crystal panel manufacturing method, liquid crystal panel and display
CN102645777B (en) * 2011-12-13 2016-12-14 北京京东方光电科技有限公司 A kind of liquid crystal panel manufacture method, liquid crystal panel and display
CN103364982A (en) * 2012-04-11 2013-10-23 群康科技(深圳)有限公司 Display device
WO2014154011A1 (en) * 2013-03-28 2014-10-02 京东方科技集团股份有限公司 Blue-phase liquid crystal composite material and liquid crystal display comprising material
US9976081B2 (en) 2013-04-28 2018-05-22 East China University Of Science And Technology Polymer-stabilized dual frequency blue phase liquid crystals
WO2014176717A1 (en) * 2013-04-28 2014-11-06 East China University Of Science And Technology Polymer-stabilized dual frequency blue phase liquid crystals
WO2014183389A1 (en) * 2013-05-13 2014-11-20 北京京东方光电科技有限公司 Method for stabilizing crystal structure of blue-phase liquid crystal, display apparatus, and manufacturing method
CN104466307A (en) * 2014-11-24 2015-03-25 电子科技大学 Phase shifter
CN106054441A (en) * 2016-08-12 2016-10-26 京东方科技集团股份有限公司 Polarizing device, drive method thereof and display device
CN106054441B (en) * 2016-08-12 2022-06-14 京东方科技集团股份有限公司 Polarizing device, driving method thereof and display device
CN108270070A (en) * 2017-01-03 2018-07-10 中兴通讯股份有限公司 A kind of liquid antenna structure and its control method
WO2018126966A1 (en) * 2017-01-03 2018-07-12 中兴通讯股份有限公司 Antenna and antenna control method
CN109216886A (en) * 2017-07-06 2019-01-15 群创光电股份有限公司 Radiation appliance
CN108281737A (en) * 2018-01-23 2018-07-13 中国计量大学 A kind of highly transmissive type Terahertz phase shifter based on Meta Materials
CN108281737B (en) * 2018-01-23 2020-05-12 中国计量大学 High-transmission type terahertz phase shifter based on metamaterial
CN108511858A (en) * 2018-04-13 2018-09-07 京东方科技集团股份有限公司 A kind of liquid crystal phase shifter and electronic equipment
US11264684B2 (en) 2018-04-13 2022-03-01 Boe Technology Group Co., Ltd. Liquid crystal phase shifter comprising a liquid crystal cell with first and second substrates separated by a partition plate having first and second microstrips on opposing surfaces of the plate
WO2019196749A1 (en) * 2018-04-13 2019-10-17 京东方科技集团股份有限公司 Liquid crystal phase shifter and electronic device
CN110943300A (en) * 2018-09-25 2020-03-31 夏普株式会社 Scanning antenna and TFT substrate
CN110943300B (en) * 2018-09-25 2021-07-13 夏普株式会社 Scanning antenna and TFT substrate
CN113258305A (en) * 2021-04-30 2021-08-13 西南电子技术研究所（中国电子科技集团公司第十研究所） Method for preparing high-frequency liquid crystal radiation area subarray of electric control holographic antenna
CN113258305B (en) * 2021-04-30 2022-07-29 西南电子技术研究所（中国电子科技集团公司第十研究所） Method for preparing high-frequency liquid crystal radiation area subarray of electric control holographic antenna
CN114879424A (en) * 2022-04-25 2022-08-09 长春理工大学 Electric control liquid crystal nonlinear optical device based on multilayer composite structure and preparation method and application thereof
KR20240047083A (en) 2022-10-04 2024-04-12 서울대학교산학협력단 Intelligent antennas based on solar cell fabrication process and manufacturing method thereof

Also Published As

Publication number Publication date
KR20090057940A (en) 2009-06-08
TW200801758A (en) 2008-01-01
GB0608055D0 (en) 2006-05-31
EP2016459A1 (en) 2009-01-21
BRPI0710770A2 (en) 2011-06-07
WO2007122409A1 (en) 2007-11-01
JP2009534974A (en) 2009-09-24

Similar Documents

Publication Publication Date Title
CN101449203A (en) Liquid crystal devices
US10804587B2 (en) Electrically controllable radio-frequency circuit element having an electrochromic material
US10629973B2 (en) Phase shift device
US11152714B2 (en) Electronically steerable planar phase array antenna
US8958050B2 (en) Tunable terahertz metamaterial filter
Karabey et al. Continuously polarization agile antenna by using liquid crystal-based tunable variable delay lines
US20140266946A1 (en) Surface scattering antenna improvements
Li et al. Design of liquid crystal based coplanar waveguide tunable phase shifter with no floating electrodes for 60–90 GHz applications
US20150325897A1 (en) Electrically controllable radio-frequency circuit element having an electrochromic material
Lv et al. A tunable metamaterial absorber based on liquid crystal with the compact unit cell and the wideband absorption
Yang et al. Reflective liquid crystal terahertz phase shifter with tuning range of over 360°
Karabey et al. Liquid crystal based phased array antenna with improved beam scanning capability
CN107785671A (en) A kind of frequency reconfigurable microband paste yagi aerial and reconstructing method
Che et al. Reconfigurable dual-band metamaterial antenna based on liquid crystals
Li All-optically Controlled Microwave Analog Phase Shifter with Insertion Losses Balancing.
Ma et al. Compact planar array antenna with electrically beam steering from backfire to endfire based on liquid crystal
Wang et al. A liquid crystal tunable metamaterial unit cell for dynamic metasurface antennas
Tesmer et al. Reconfigurable liquid crystal Dielectric image line leaky wave antenna at W-band
Tchema et al. An investigation of the dynamic beam-steering capability of a liquid-crystal-enabled leaky-wave antenna designed for 5G applications
Wang et al. A planar quasi yagi-uda antenna designed for liquid crystal based end-fire phased arrays
Roig et al. Electrically tunable liquid crystal based composite right/left-handed leaky-wave antenna at 26.7 GHz
Cai et al. Evaluation of reconfigurable reflectarray antenna element at 19 GHz based on highly anisotropic liquid crystal material
Kim et al. Fast reconfigurable phase shifter based on a chiral liquid crystal configuration
Liang et al. A dual‐function switchable and frequency tunable active frequency selective surface
Karabey Microwave material properties of nanoparticle-doped nematic liquid crystals

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Open date: 20090603