CN102352260B - Liquid crystal composition and liquid crystal lens - Google Patents
Liquid crystal composition and liquid crystal lens Download PDFInfo
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- CN102352260B CN102352260B CN201110213905.3A CN201110213905A CN102352260B CN 102352260 B CN102352260 B CN 102352260B CN 201110213905 A CN201110213905 A CN 201110213905A CN 102352260 B CN102352260 B CN 102352260B
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- 0 *C(CC1)CCC1c1ccc(C=C)cc1 Chemical compound *C(CC1)CCC1c1ccc(C=C)cc1 0.000 description 6
- NDMJRAXMSOTGTM-UHFFFAOYSA-N CCCC(CC1)CCC1c1ccc(C=C)cc1 Chemical compound CCCC(CC1)CCC1c1ccc(C=C)cc1 NDMJRAXMSOTGTM-UHFFFAOYSA-N 0.000 description 1
- WRWPPGUCZBJXKX-UHFFFAOYSA-N Cc(cc1)ccc1F Chemical compound Cc(cc1)ccc1F WRWPPGUCZBJXKX-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a liquid crystal composition, comprising a first variety of compound shown as a general formula I, a second variety of compound shown as a general formula II, a third variety of compound shown as a general formula III and a fourth variety of compound shown as a general formula IV; the invention also provides a liquid crystal lens employing the liquid crystal composition. The liquid crystal composition of the present invention has characteristics of low nematic phase initial voltage, wide phase transition temperature scope, small viscoelastic coefficient ratio gamma 1/K11, large optical anisotropy and large dielectric anisotropy, etc., and can reduce a thickness value of a liquid crystal lens box and increase response speed of the liquid crystal lens box.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of liquid-crystal composition and liquid crystal lens thereof.
Background technology
The devices such as camera, mobile phone camera, the demonstration of 3D stereopsis, phase modulator, often utilize zoom lens by image zoom or dwindle imaging.Traditional zoom camera lens is provided with multiple mirror groups (lens group), by moving along optical axis direction between mirror group, to change spacing each other, thereby whole focal length is changed, but does not affect image-forming range.But this kind of camera lens need to be longer mirror group miles of relative movement, cause mechanism volume large, regulate slowly, focusing range is limited, expensive, device drives consumed energy large and easily damage etc.
For finding the method that substitutes mechanical focusing, and can change focal length on a large scale, prior art utilizes electric field to control the liquid-crystal zoom lens of focal length (Liquid Crystal lens), form special electric field by applying voltage on the electrode with circular hole, liquid crystal molecule in electric field is deflected, thereby light is played to the effect that disperses or assemble.It is actual is a kind of simulated optical element, can realize easily by apply different voltage between electrode the specific optical lens characteristic that we want.
Wherein, column liquid crystal lens grating is a kind of device that utilizes electric field to form lens in prior art, can realize 3D stereo display.Described column liquid crystal lens grating by etching strip transparent ITO electrode on transparent glass substrate, then on this electrode, apply different voltage and form electric field, liquid crystal molecule in electric field is deflected, thereby change incident direction of light, the variation of logical superpotential variation and number of electrodes simultaneously changes focal length and the pitch etc. of column liquid crystal lens grating.
But because the each component of liquid-crystal composition has different physicalies, therefore the parameters combination of the each component of liquid-crystal composition has determined each performance of liquid-crystal composition.Wherein, for realizing the superiority of the more traditional column physical grating of column liquid crystal lens grating, need column liquid crystal lens grating under 60Hz, 120Hz or higher frequency, can freely switch, to this, need a kind of liquid-crystal composition with high speed response property.Between each variable of the liquid-crystal composition relevant with the response performance of column liquid crystal lens grating, there is following relation:
Relational expression one: T
on=(γ 1d
2/ k11 π
2)/[(V/Vth)
2-1]
Relational expression two: T
off=γ 1d
2/ k11 π
2
Wherein, γ 1 is rotary viscosity, and d is thickness of liquid crystal layer, and K11 is the bent elastic constant of exhibition, and V is driving voltage, and Vth is threshold voltage.Can find out from above-mentioned relation formula, by reducing the rotary viscosity of liquid-crystal composition or improving it and open up bent elastic constant, or reduce thickness of liquid crystal layer, can shorten its time of response.But if reduce rotary viscosity to improve the time of response, the bent elastic constant of the exhibition of liquid crystal and transformation temperature also will decline thereupon, and, increase if open up bent elastic constant, threshold voltage and rotary viscosity will be tending towards increasing.Meanwhile, if will reduce thickness of liquid crystal layer, the degree of birefringence of liquid-crystal composition will increase, and this can cause rotary viscosity to increase equally.Therefore,, for improving the time of response, it is minimum that the equilibrium relationship between these three influence factors must reduce to.
In addition, degree of birefringence is also an important physical property of liquid crystalline cpd.Common TN, STN shows by the degree of birefringence of liquid crystal material generally between 0.12 to 0.20, TFT shows by the degree of birefringence of liquid crystal material generally between 0.065 to 0.135, PDLC and multistable demonstration generally need to be greater than 0.20 by the degree of birefringence of liquid crystal material, and the degree of birefringence of 3D liquid crystal material of liquid crystal lens (Liquid Crystal lens) for stereo display is generally greater than 0.25.
In view of the selection of the each component of liquid-crystal composition and proportioning have determined each performance of liquid-crystal composition, and the performance perameter of the liquid-crystal composition of prior art fails to realize comparatively ideal combination, therefore, be necessary monomer liquid crystal selection and component proportion in liquid-crystal composition to do further optimization.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of liquid-crystal composition and liquid crystal lens thereof, fails to realize the problem of more satisfactory combination to solve the performance perameter of liquid-crystal composition of prior art.
The invention provides a kind of liquid-crystal composition, this liquid-crystal composition comprises:
A. the first kind compound being represented by general formula I that weight percent is 0%-70%:
Wherein, R1 and R2 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 1-10 carbon atom or there is the alkoxyl group of 1-10 carbon atom, K1 and K2 are H or F independently of one another,
be independently of one another
or
B. the Equations of The Second Kind compound being represented by general formula I I that weight percent is 0-50%:
Wherein, R3 and R4 be independently of one another-NCS ,-CN ,-F, have the alkyl of 0-10 carbon atom or have the alkoxyl group of 0-10 carbon atom, and K3 and K4 are H or F independently of one another, Z is-COO-,-C ≡ C-or-CH2CH2-;
The 3rd compounds that what c. weight percent was 0-50% represented by general formula III:
Wherein, R5 and R6 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K5, K6, K7, K8, K9 and K10 are H or F independently of one another,
be independently of one another
and
D. the 4th compounds being represented by general formula I V that weight percent is 0-20%:
Wherein, R7 and R8 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K11, K12, K13, K14, K15 and K16 are H or F independently of one another,
be
with
one wherein, Y is-COO-,-C ≡ C-or-CH2CH2-.
According to a preferred embodiment of the invention, this liquid-crystal composition further comprises:
E. the 5th compounds being represented by general formula V that weight percent is 0-50%:
Wherein, R9 and R10 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K17 and K18 are H or F independently of one another,
be independently of one another
one wherein.
According to a preferred embodiment of the invention, this liquid-crystal composition further comprises:
F. the 6th compounds that weight percent is 0-5%, the 6th compounds is selected from one or more in following compounds:
and
According to a preferred embodiment of the invention, the weight percent of the 6th compounds is 0%-1%.
According to a preferred embodiment of the invention, the 5th compounds being represented by general formula V is selected from one or more in following compounds:
and
The weight percent of the 5th compounds being represented by general formula V according to a preferred embodiment of the invention, is 0%-30%.
According to a preferred embodiment of the invention, the first kind compound being represented by general formula I is selected from one or more in following compounds:
and
According to a preferred embodiment of the invention, the Equations of The Second Kind compound being represented by general formula I I is selected from one or more in following compounds:
and
According to a preferred embodiment of the invention, the 3rd compounds being represented by general formula III is selected from one or more in following compounds:
and
According to a preferred embodiment of the invention, the 4th compounds being represented by general formula I V is selected from one or more in following compounds:
and
The weight percent of the first kind compound being represented by general formula I according to a preferred embodiment of the invention, is 0%-40%.
The weight percent of the Equations of The Second Kind compound being represented by general formula I I according to a preferred embodiment of the invention, is 0%-30%.
The weight percent of the 3rd compounds being represented by general formula III according to a preferred embodiment of the invention, is 0%-30%.
The weight percent of the 4th compounds being represented by general formula I V according to a preferred embodiment of the invention, is 0%-10%.
The present invention also provides a kind of liquid crystal lens, and this liquid crystal lens comprises liquid-crystal composition of the present invention.
The invention has the beneficial effects as follows: the performance perameter that is different from prior art liquid-crystal composition fails to realize the problem of more satisfactory combination, liquid-crystal composition of the present invention has lower nematic phase starting voltage, wider transformation temperature scope, less viscoelastic coefficient ratio γ 1/K11, the larger characteristic such as optical anisotropy and larger dielectric anisotropy, can reduce liquid crystal lens box one-tenth-value thickness 1/10 and improve its response speed.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
For convenience of expressing, the listed coded representation of table 1 for the unit structure of liquid crystalline cpd hereinafter:
Table 1: the unit structure code of liquid crystalline cpd
Taking the compound of following structural formula as example:
if this structural formula represents to can be expressed as by code listed in Table 1: nCPTWS.Wherein, the n in code represents the C atomicity of left end alkyl, and for example n is 3, represents that this alkyl is-C
3h
7; C in code represents cyclohexyl; P in code represents phenylene; W in code represents 3,5-difluoro phenylene; S in code represents isothiocyano.
Need in an embodiment the related physical performance perameter code name and the testing conditions that detect to be listed below:
Tni clearing point (nematic phase-isotropic phase transition temperature);
Tcn smectic phase-nematic Phase temperature;
γ 1 rotary viscosity (20 DEG C of 20 μ m antiparallel testing cassete of mpa.s);
ε // the be parallel to specific inductivity (20 DEG C of 20 μ m antiparallel testing cassete of 1KHz) in long axis of liquid crystal molecule direction;
ε ⊥ is perpendicular to the specific inductivity in long axis of liquid crystal molecule direction (20 DEG C of 20 μ m antiparallel testing cassete of 1KHz);
Δ ε dielectric anisotropy (20 DEG C of 20 μ m antiparallel testing cassete of 1KHz);
Δ n optical anisotropy (20 DEG C of 8 μ m antiparallel testing cassete);
K11 opens up bent elastic constant (20 DEG C of 20 μ m antiparallel testing cassete);
K33 bend elastic constant (20 DEG C of 20 μ m antiparallel testing cassete);
Vth starting voltage (20 DEG C time liquid crystal molecule just started to rotate required voltage);
γ 1/K11 viscoelastic coefficient ratio.
The invention provides a kind of liquid-crystal composition A, this liquid-crystal composition A comprises:
A. the first kind compound being represented by general formula I:
Wherein, R1 and R2 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 1-10 carbon atom or there is the alkoxyl group of 1-10 carbon atom, K1 and K2 are H or F independently of one another,
be independently of one another
or
B. the Equations of The Second Kind compound being represented by general formula I I:
Wherein, R3 and R4 be independently of one another-NCS ,-CN ,-F, have the alkyl of 0-10 carbon atom or have the alkoxyl group of 0-10 carbon atom, and K3 and K4 are H or F independently of one another, Z is-COO-,-C ≡ C-or-CH2CH2-;
C. the 3rd compounds being represented by general formula III:
Wherein, R5 and R6 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K5, K6, K7, K8, K9 and K10 are H or F independently of one another,
be independently of one another
and
D. the 4th compounds being represented by general formula I V:
Wherein, R7 and R8 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K11, K12, K13, K14, K15 and K16 are H or F independently of one another,
be
with
one wherein, Y is-COO-,-C ≡ C-or-CH2CH2-.
Wherein, the weight percent of the first kind compound being represented by general formula I is 0%-70%, and particularly preferably weight percent is 0%-40%.The first kind compound being represented by general formula I has extremely low viscosity, can effectively reduce the overall viscosity of liquid-crystal composition and improve its response speed.
Particularly preferably one or more in following compounds of first kind compound that represented by general formula I:
The weight percent of the Equations of The Second Kind compound being represented by general formula I I is 0-50%, and particularly preferably weight percent is 0%-30%.The Equations of The Second Kind compound being represented by general formula I I has moderate degree of birefringence, relatively low rotary viscosity, and relatively low transformation temperature has certain Δ ε value simultaneously, can reduce starting voltage.
Particularly preferably one or more in following compounds of Equations of The Second Kind compound that represented by general formula I I:
The weight percent of the 3rd compounds being represented by general formula III is 0-50%, and particularly preferably weight percent is 0%-30%.The 3rd compounds being represented by general formula III, compared with biphenyl acetylene compound, has higher clearing point, has larger degree of birefringence simultaneously, can effectively improve the Δ n of liquid-crystal composition, thereby it is thick to reduce the box of liquid crystal cell, improves response speed.
The 3rd compounds being represented by general formula III is selected from one or more in following compounds:
The weight percent of the 4th compounds being represented by general formula I V is 0-20%, and particularly preferably weight percent is 0%-10%.The 4th compounds being represented by general formula I V has moderate degree of birefringence, moderate clearing point, moderate starting voltage, especially the more important thing is relatively high elastic constant K11, can effectively reduce liquid-crystal composition viscoelastic coefficient, shorten its time of response.
The 4th compounds being represented by general formula I V is selected from one or more in following compounds:
Selectively, liquid-crystal composition A of the present invention can further include:
F. the 6th compounds, the 6th compounds is selected from one or more in following compounds:
and
The 6th compounds is optically active compounds, and its weight percent is 0-5%, and particularly preferred weight percent is 0%-1%.
The present invention also provides a kind of liquid-crystal composition B, and this liquid-crystal composition B comprises:
A. the first kind compound being represented by general formula I;
B. the Equations of The Second Kind compound being represented by general formula I I;
C. the 3rd compounds being represented by general formula III;
D. the 4th compounds being represented by general formula I V; And
E. the 5th compounds being represented by general formula V:
Wherein, R9 and R10 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 0-10 carbon atom or there is the alkoxyl group of 0-10 carbon atom, K17 and K18 are H or F independently of one another,
be independently of one another
one wherein.
Wherein, first kind compound, the Equations of The Second Kind compound being represented by general formula I I, the 3rd compounds being represented by general formula III that what liquid-crystal composition B was included represented by general formula I and the 4th compounds being represented by general formula I V have the technology contents identical with the first kind compound being represented by general formula I included in liquid-crystal composition A, the Equations of The Second Kind compound being represented by general formula I I, the 3rd compounds being represented by general formula III and the 4th compounds that represented by general formula I V, for for purpose of brevity, repeat no more herein.
The 5th compounds weight percent being represented by general formula V is 0-50%, and particularly preferably weight percent is 0%-30%.The 5th compounds being represented by general formula V has extremely low rotary viscosity, and degree of birefringence can be too not low, joined the viscoelastic coefficient ratio that can greatly reduce liquid-crystal composition system in liquid-crystal composition, and the time of response of improving liquid-crystal composition.
The 5th compounds being represented by general formula V is selected from one or more in following compounds:
Selectively, liquid-crystal composition B of the present invention can further include f. the 6th compounds, the 6th included compounds of liquid-crystal composition B has the technology contents identical with the 6th compounds included in liquid-crystal composition A, for the purpose of indirectly, repeats no more herein.
The compound composition of the nematic liquid crystal composition of embodiment 1 to embodiment 9 refers to shown in table 2, and wherein percentage ratio represents weight percent.Nematic liquid crystal composition in embodiment 1 to embodiment 5 is the specific embodiment of liquid-crystal composition A of the present invention, and the nematic liquid crystal composition in embodiment 6 to embodiment 9 is the specific embodiment of liquid-crystal composition B of the present invention.
The compound composition of the nematic liquid crystal composition of table 2: embodiment 1 to embodiment 9
In the above-described embodiments, also can add according to actual needs optically active compounds as the 6th compounds, its content is the 0-5% of nematic liquid crystal composition weight percent, particularly preferably 0-1%, above-mentioned optically active compounds mainly includes but are not limited to following several chiral additives: as CB15, R-811, S-811, R-1011, S-1011 etc.
The performance perameter of the nematic liquid crystal composition of embodiment 1 to embodiment 9 please be participated in shown in table 3.
The performance perameter of the nematic liquid crystal composition of table 3: embodiment 1 to embodiment 9
As shown in table 3, the degree of birefringence Δ n of the nematic liquid crystal composition of embodiment 1 to embodiment 9 is respectively 0.2545,0.332,0.342,0.371,0.381,0.2769,0.332,0.3654 and 0.369, all belong to larger degree of birefringence, and chemical stability and light stability all very high.
In addition, embodiment 1 also has following beneficial effect to the nematic liquid crystal composition of this embodiment 5:
1, starting voltage be 0.67V between 0.86V, meet low starting voltage; TCN is-10 DEG C, and Tni is between 110-121 DEG C, and nematic phase ceiling temperature is high, lower limit temperature is low, lower to temperature dependency;
2, rotary viscosity γ 1 is respectively 128.6mpa.s, 132.6mpa.s, 133mpa.s, 168mpa.s and 176mpa.s, all belongs to lower rotary viscosity.
Embodiment 6 also has following beneficial effect to the nematic liquid crystal composition of this embodiment 9:
1, starting voltage be 0.67V between 0.86V, meet low starting voltage; TCN is-20 DEG C--10 DEG C, Tni is between 85-110 DEG C, and nematic phase ceiling temperature is high, lower limit temperature is low, lower to temperature dependency;
2, rotary viscosity γ 1 is respectively 101mpa.s, 121mpa.s, 123mpa.s and 138mpa.s, all belongs to lower rotary viscosity;
3, have very low viscoelastic coefficient ratio, γ 1/K11 is all below 12, and viscoelastic coefficient ratio is to affect time of response very important factor.
The present invention also provides a kind of liquid crystal lens, and this liquid crystal lens comprises arbitrary liquid-crystal composition as described in the present invention.
Liquid-crystal composition of the present invention can adopt ordinary method that two or more liquid crystalline cpds are mixed and produced, for example, by high temperature the method preparation of different compound dissolving each other being obtained.In sum, liquid-crystal composition of the present invention has lower nematic phase starting voltage, wider transformation temperature scope, less viscoelastic coefficient ratio γ 1/K11, the larger characteristic such as optical anisotropy and larger dielectric anisotropy, can reduce liquid crystal lens box one-tenth-value thickness 1/10 and improve its response speed, making liquid crystal display product more frivolous.
Liquid-crystal composition of the present invention can be used for TN demonstration, STN demonstration, PDLC demonstration, multistable demonstration, phase modulator and camera, mobile phone camera, liquid crystal shutter 3D glasses, 3D stereo display liquid crystal crack grating, 3D stereopsis shows with fields such as varifocal liquid crystal lens (Liquid Crystal lens).
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure transformation that utilizes description of the present invention to do, or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a liquid-crystal composition, is characterized in that, described liquid-crystal composition comprises:
A. the first kind compound being represented by general formula I that weight percent is 40%-70%:
Wherein, R1 and R2 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 1-10 carbon atom or there is the alkoxyl group of 1-10 carbon atom, K1 and K2 are H or F independently of one another,
be independently of one another
or the described first kind compound being represented by general formula I is selected from one or more in following compounds:
B. the Equations of The Second Kind compound being represented by general formula II that weight percent is 0-30%:
Wherein, R3 and R4 be independently of one another-NCS ,-CN ,-F, have the alkyl of 2-10 carbon atom or have 0-10 and do not comprise the alkoxyl group of 0 carbon atom, and K3 and K4 are H or F independently of one another, Z is-COO-,-C ≡ C-or-CH2CH2-;
C. the 3rd compounds being represented by general formula III that weight percent is 30-50%:
Wherein, R5 is-NCS ,-CN ,-F, there is the alkyl of 2-10 carbon atom or there is 0-10 and do not comprise the alkoxyl group of 0 carbon atom, R6 is-NCS; K5, K6, K7, K8, K9 and K10 are H or F independently of one another,
be independently of one another
and
D. the 4th compounds being represented by general formula IV that weight percent is 0-20%:
Wherein, R7 and R8 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 2-10 carbon atom or there is 0-10 and do not comprise the alkoxyl group of 0 carbon atom, K11, K12, K13, K14, K15 and K16 are H or F independently of one another,
one wherein, Y is-COO-,-C ≡ C-or-CH2CH2-.
2. liquid-crystal composition according to claim 1, is characterized in that, described liquid-crystal composition further comprises:
E. the 5th compounds being represented by general formula V that weight percent is 0-30%:
Wherein, R9 and R10 be independently of one another-NCS ,-CN ,-F, there is the alkyl of 3-10 carbon atom or there is 0-10 and do not comprise the alkoxyl group of 0 carbon atom, K17 and K18 are H or F independently of one another,
be independently of one another
one wherein;
Or described the 5th compounds being represented by general formula V is selected from one or more in following compounds:
3. liquid-crystal composition according to claim 1 and 2, is characterized in that, described liquid-crystal composition further comprises:
F. the 6th compounds that weight percent is 0-5%, described the 6th compounds is selected from one or more in following compounds:
4. liquid-crystal composition according to claim 3, is characterized in that, the weight percent of described the 6th compounds is 0%-1%.
5. liquid-crystal composition according to claim 2, is characterized in that, described the 5th compounds being represented by general formula V is selected from one or more in following compounds:
and
6. liquid-crystal composition according to claim 1, is characterized in that, the described first kind compound being represented by general formula I is selected from one or more in following compounds:
and
7. liquid-crystal composition according to claim 1, is characterized in that, the described Equations of The Second Kind compound being represented by general formula II is selected from one or more in following compounds:
and
8. liquid-crystal composition according to claim 1, is characterized in that, described the 3rd compounds being represented by general formula III is selected from one or more in following compounds:
9. liquid-crystal composition according to claim 1, is characterized in that, described the 4th compounds being represented by general formula IV is selected from one or more in following compounds:
and
10. liquid-crystal composition according to claim 1, is characterized in that, the weight percent of described the 4th compounds being represented by general formula IV is 0%-10%.
11. 1 kinds of liquid crystal lens, is characterized in that, described liquid crystal lens comprises the liquid-crystal composition as described in claim 1,2,5-10 any one.
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| CN102433133B (en) * | 2011-09-14 | 2014-09-24 | 深圳超多维光电子有限公司 | Nematic liquid crystal composition |
| CN102660296B (en) * | 2012-05-16 | 2014-06-04 | 深圳超多维光电子有限公司 | Liquid crystal composition and application thereof |
| EP2982730B1 (en) | 2014-08-08 | 2019-10-16 | Merck Patent GmbH | Liquid-crystalline medium and high-frequency components comprising same |
| CN105985787B (en) * | 2014-08-25 | 2019-01-15 | 深圳超多维科技有限公司 | Liquid-crystal composition and liquid crystal lens |
| CN105038816B (en) * | 2015-07-13 | 2017-09-29 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition |
| CN106479515B (en) * | 2015-09-01 | 2019-01-15 | 深圳超多维科技有限公司 | A kind of liquid-crystal composition and liquid crystal lens |
| CN106479516A (en) * | 2016-08-31 | 2017-03-08 | 中节能万润股份有限公司 | A kind of low-voltage liquid-crystal composition and low-voltage polymer dispersion liquid crystal material |
| EP3312257B1 (en) * | 2016-10-18 | 2019-11-20 | Merck Patent GmbH | Liquid-crystalline medium and high-frequency components comprising same |
| CN110616075B (en) * | 2019-10-15 | 2021-04-30 | 浙江晶鲸科技有限公司 | Electric control optical diffraction element based on multistable liquid crystal composition and manufacturing method thereof |
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