CN108227271B - Light modulation device containing guest-host liquid crystal composition - Google Patents
Light modulation device containing guest-host liquid crystal composition Download PDFInfo
- Publication number
- CN108227271B CN108227271B CN201611157761.3A CN201611157761A CN108227271B CN 108227271 B CN108227271 B CN 108227271B CN 201611157761 A CN201611157761 A CN 201611157761A CN 108227271 B CN108227271 B CN 108227271B
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- guest
- crystal composition
- dye
- host liquid
- 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.)
- Active
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 104
- 239000000203 mixture Substances 0.000 title claims abstract description 56
- 239000000758 substrate Substances 0.000 claims abstract description 31
- -1 2-cyclopropyl Chemical group 0.000 claims description 66
- 239000000975 dye Substances 0.000 claims description 41
- 150000001875 compounds Chemical class 0.000 claims description 31
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- 125000003545 alkoxy group Chemical group 0.000 claims description 10
- 125000003342 alkenyl group Chemical group 0.000 claims description 9
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 229910052736 halogen Inorganic materials 0.000 claims description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 3
- 239000001045 blue dye Substances 0.000 claims description 2
- 239000001046 green dye Substances 0.000 claims description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 239000001048 orange dye Substances 0.000 claims description 2
- 239000001044 red dye Substances 0.000 claims description 2
- 125000005843 halogen group Chemical group 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 26
- 239000011521 glass Substances 0.000 description 22
- 238000002834 transmittance Methods 0.000 description 20
- 239000004988 Nematic liquid crystal Substances 0.000 description 14
- 125000000217 alkyl group Chemical group 0.000 description 12
- 229920000642 polymer Polymers 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- 125000001309 chloro group Chemical group Cl* 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000003381 stabilizer Substances 0.000 description 6
- 238000013329 compounding Methods 0.000 description 5
- 125000001153 fluoro group Chemical group F* 0.000 description 5
- 150000002367 halogens Chemical group 0.000 description 5
- 239000011737 fluorine Substances 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical group [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 3
- 229920000106 Liquid crystal polymer Polymers 0.000 description 3
- 239000004977 Liquid-crystal polymers (LCPs) Substances 0.000 description 3
- 239000004983 Polymer Dispersed Liquid Crystal Substances 0.000 description 3
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 3
- 150000004056 anthraquinones Chemical class 0.000 description 3
- 229910052801 chlorine Inorganic materials 0.000 description 3
- 239000000460 chlorine Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 239000012612 commercial material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 239000001047 purple dye Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 description 1
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 description 1
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 description 1
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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/46—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing esters
Landscapes
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Nonlinear Science (AREA)
- Dispersion Chemistry (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The present invention provides a dimming device comprising a guest-host liquid crystal composition, the dimming device comprising: an upper substrate, a lower substrate, an upper alignment layer, a lower alignment layer, a guest-host liquid crystal composition sandwiched between the upper and lower alignment layers, wherein the guest-host liquid crystal composition comprises a dichroic dye and a mother liquid crystal. The guest-host liquid crystal composition is adopted for dimming, the use of a polaroid is abandoned, and an electrode is not needed, so that the problem of energy consumption is fundamentally solved. Meanwhile, because no polaroid is used and no electrode is needed, the cost is greatly reduced.
Description
Technical Field
The present invention relates to a light modulating device, and more particularly, to a light modulating device comprising a guest-host liquid crystal composition.
Background
In the prior art, the dimming glass market is exploded, and the dimming glass is more and more in variety, and the wide application is in fields such as car glass, architectural decoration, outdoor curtain.
The dimming glass is electrochromic dimming glass, and the state of a functional material in a polyester film or an interlayer is controlled through safe low voltage, so that the aim of color changing and dimming is fulfilled. The color depth of the electrochromic dimming glass can be controlled by changing the current, so that the intensity of sunlight irradiating indoors can be adjusted. When voltage is applied to the electrochromic dimming glass, the electrochromic material in the electrochromic dimming glass is colored, and when the voltage is removed, the dimming glass returns to a mist shading state, namely, the dimming glass needs to be applied with voltage all the time when the dimming glass maintains the coloring state. In practical applications, it can be seen that the dimming glass has many advantages. For example, when the dimming glass is in an opaque state, the dimming glass can be used as a curtain, a solid curtain does not need to be installed, the dimming glass has ultraviolet-proof and sound-proof functions, can adjust the transmittance of the sun, can adjust the light locally, and has a prompting or displaying function and the like. However, it can be seen from practical applications that, although the light control glass has the above advantages, the light control glass always needs to be in a charged state, that is, needs to be charged to operate.
For example, the switching layer of the dimming device can be made of conventional nematic (nematic) liquid crystal, however, the nematic liquid crystal needs to use a polarizer as the switching layer, generally, the transmittance of a single-layer polarizer is about 50%, and the transmittance of an actual device needs to use two layers of polarizers, which is below 30%, so that the dimming device cannot meet the requirement of high transmittance. Moreover, continuous electricity consumption is needed, certain energy consumption is achieved, and the requirements of modern science and technology on energy conservation and environmental protection cannot be met.
For another example, an electro-dimmer device manufactured by a liquid crystal polymer dimming technology (PDLC) is currently on the market, in which nematic liquid crystal is mainly mixed with a molecular polymer, and the arrangement state of the nematic liquid crystal is controlled to generate different refractive indexes inside the device to exhibit macroscopic state transition between light transmission and light scattering. Specifically, this technique is: selecting proper amount of nematic liquid crystal and certain amount of molecular polymer, mixing, pouring the mixture into the gap between two layers of glass, coating transparent electrodes on the corresponding surfaces of two layers of glass, and irradiating with ultraviolet ray of certain wavelength and strength to change the molecular polymer into transparent molecular polymer. Since nematic liquid crystal molecules are uniformly mixed with molecular polymers, the nematic liquid crystal molecules are uniformly divided into small bubble-like spaces during the formation of the molecular polymers (i.e., the molecular polymers and the nematic liquid crystal molecules are changed from fusion to separation, the molecular polymers carry countless small liquid crystal bubbles as if they are networks, and the molecular polymers serve as carriers). In the case of no voltage application, since the alignment of nematic liquid crystal molecules is not strongly directional and is a relatively disordered state as a whole, the scattering phenomenon is very significant. Under the condition of applying a certain electric field, the nematic liquid crystal molecules have directional arrangement, and the difference of the refractive index of the nematic liquid crystal molecules and the large-area molecular polymer carrier is eliminated, so that the nematic liquid crystal display device presents a transparent state. Compared with the dimming glass manufactured by using the traditional nematic liquid crystal, the electroluminescent dimming glass applied with the liquid crystal polymer dimming technology has better transmittance, and is mainly applied to the fields of automobile dimming skylights and the like at present. However, this liquid crystal polymer dimming technique has only two states, transparent and opaque, which, like conventional nematic liquid crystals, requires a constant supply of power to maintain the transparent state.
The existing PDLC device has the problems of high driving voltage (generally more than 30V), haze, high energy consumption, poor safety and poor transparency, and the dimming device has the problems of complexity in manufacture and high volume production cost due to the complex structure of the PDLC device. Therefore, it is an urgent need to solve the problem of designing a light modulator which can change the light transmission state without adding an external power supply, has no haze and has a simple structure.
Disclosure of Invention
The purpose of the present invention is to provide a light control device comprising a guest-host liquid crystal composition, which can switch between a change in shade and a bright/dark state without using an external power source, thereby achieving light control.
The invention provides a novel dimming mode. The guest-host liquid crystal composition is adopted for dimming, the use of a polaroid is abandoned, and electric drive is not needed, so that the problem of energy consumption is fundamentally solved. Meanwhile, because no polaroid is used, and no electrode layer is needed in the device, the cost is greatly reduced.
The present invention provides a dimming device, comprising: an upper substrate, a lower substrate, an upper alignment layer, a lower alignment layer, a guest-host liquid crystal composition sandwiched between the upper and lower alignment layers, wherein the guest-host liquid crystal composition comprises a dichroic dye and a mother liquid crystal.
The light modulation device comprising the guest-host liquid crystal composition does not comprise a polarizer and an electrode layer.
The upper substrate and the lower substrate are respectively a rigid transparent substrate or a flexible transparent substrate.
The dichroic dye is selected from one or more of blue dye, red dye, green dye, orange dye and purple dye.
The rigid substrate is a transparent glass substrate.
The flexible substrate is a transparent plastic substrate.
The upper substrate and/or the lower substrate do not include a transparent conductive layer.
The upper orientation layer and the lower orientation layer are both vertical orientation layers.
In some embodiments of the invention, the parent liquid crystal has a clearing point of 10-60 ℃.
In some embodiments of the invention, both the upper and lower alignment layers are homeotropic alignment layers.
In some embodiments of the present invention, the vertical alignment layers of the upper and lower substrates have pretilt angles ranging from 85 ° to 89 °.
In some embodiments of the invention, the parent liquid crystal comprises at least one neutral liquid crystal compound.
In some embodiments of the present invention, the neutral liquid crystal compound comprises:
at least one compound represented by the general formula I,
wherein,
R1and R2Each independently represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 12 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 12 carbon atoms;
X1and X2Each independently selected from the group consisting of 1, 2-cyclopropyl, 1, 3-cyclobutyl, 1, 3-cyclopentyl, 1, 4-cyclohexyl1, 4-cyclohexenyl, piperidine-1, 4-diyl, 1, 4-bicyclo [2,2 ] idene]Octyl, 1, 4-phenyl, pyridine-2, 5-diyl, pyrimidine-2, 5-diyl, naphthalene-2, 6-diyl, trans-decahydronaphthalene-2, 6-diyl, tetrahydronaphthalene-2, 6-diyl and indan-2, 5-diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O or S, one or more H in the 1, 4-phenyl group may be substituted by halogen;
Z1and Z2Each independently represents-CO-, -OC-, -OCO-, -COO-, -CF2O-、-OCF2-、-CH2O-、-OCH2-、-CH2CH2-、-CF2CF2-、-CF2CH2-、-CF=CF-、-CH=CH-、-C≡C-、-CH(CH3)CH2-、-CH2CH(CH3)-、-(CH2)3O-、-O(CH2)3-、-COS-、-SCO-、-CH=CF-、-(CH2)4-、-C4F8-、-OCF2CF2O-、-CF2CF2CF2O-、-CH2CH2CF2O-、-CH2CF2OCH2-、-CH=CHCF2O-、-CF2OCH=CH-、-CF2OCF=CH-、-CF2OCH=CF-、-CF=CFCF2O-、-CF2OCF=CF-、-CH=CHCH2CH2-、-C2H4OCH2-、-CH2CH=CHCH2-、-OCH2CH2CH2-、-CF=CF-CF=CF-、-C≡C-CF=CF-、-C≡C-CF=CF-C≡C-、-CF=CF-C≡C-CF=CF-、-C≡C-CF2O-or a single bond, when a plurality of X's are present2And Z2In the case of (2), they may be the same or different;
p represents 0, 1,2 or 3.
In some embodiments of the invention, R1And R2Each independently represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 6 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 6 carbon atoms.
In some embodiments of the invention, X is1And X2Each independently selected from the group consisting of 1, 2-cyclopropyl, 1, 3-cyclobutyl, 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl and indan-2, 5-diyl, wherein one or two CH groups in the 1, 4-cyclohexyl group are not directly attached2May be replaced by O or S, one or more H in the 1, 4-phenyl group may be substituted by halogen; preferably, X1And X2Each independently selected from the group consisting of 1, 2-cyclopropyl, 1, 3-cyclobutyl, 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl and indan-2, 5-diyl, wherein one or more H in the 1, 4-phenyl group may be substituted by fluorine or chlorine, particularly preferably, X1And X2Each independently selected from the group consisting of 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-phenyl, wherein one or more H in the 1, 4-phenyl group may be substituted by fluorine or chlorine, provided that when H is substituted by fluorine or chlorine, the substitution positions are not adjacent.
In some embodiments of the invention, Z1And Z2Each independently represents-CO-, -OC-, -OCO-, -COO-, -CF2O-、-OCF2-、-CH2O-、-OCH2-、-CH2CH2-、-CH=CH-、-C≡C-、-OCF2CF2O-and single bonds; preferably, Z1And Z2Each independently represents-CO-, -OCO-, -COO-, -CF2O-、-CH2O-、-CH2CH2-, -CH-, -C.ident.C-, or a single bond.
In some embodiments of the present invention, the compound represented by formula i is selected from one or more of the following compounds:
wherein,
R1and R2Each independently represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 6 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 6 carbon atoms.
In some embodiments of the invention, the compound of formula i is present in an amount of 10 to 90% by weight of the total weight of the parent liquid crystal, preferably: 20 to 80%, more preferably: 30 to 75%, more preferably: 35 to 70%, more preferably: 40 to 70%, more preferably: 45 to 70 percent.
In some embodiments of the invention, the parent liquid crystal may further comprise a negative liquid crystal compound.
In some embodiments of the invention, the negative liquid crystal compound comprises:
at least one compound of the general formula II
Wherein,
R3and R4Each independently represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 12 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 12 carbon atoms;
ring a and ring B are each independently selected from the group consisting of 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl, and indan-2, 5 diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O, one or more H in the 1, 4-phenyl group may be substituted by halogen or CN;
Z3and Z4Each independently represents-CO-, -OC-, -OCO-, -COO-, -CF2O-、-OCF2-、-CH2O-、-OCH2-、-CH2CH2-、-CF2CF2-、-CF2CH2-, -CF-, -CH-, -C.ident.C-or a single bond, when a plurality of rings A and Z are present3In the case of (2), they may be the same or different;
Y1and Y2Each independently represents-H, -F, -CN or-Cl, when Y1And Y2When it is H, at least one of the ring A and the ring B representsWherein, Y3And Y4Each independently represents-F, -CN or-Cl;
m and n each independently represent 0, 1,2 or 3,
In some embodiments of the invention, R3And R4Each independently represents-H, an alkyl or alkoxy group having 1 to 6 carbon atoms, an alkenyl or alkenyloxy group having 2 to 6 carbon atoms.
In some embodiments of the invention, ring a and ring B are each independently selected from the group consisting of 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl, and indan-2, 5 diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O, one or more H in the 1, 4-phenyl group may be substituted by fluoro or chloro, preferably, ring a and ring B are each independently selected from the group consisting of 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl and indan-2, 5-diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O and one or more H in the 1, 4-phenyl group may be substituted by fluorine.
In some embodiments of the invention, Y is1And Y2Each independently represents-H, -F, -CN or-Cl.
In some embodiments of the present invention, the compound represented by formula ii is selected from one or more of the following compounds:
wherein,
R3and R4Each independently represents-H, an alkyl or alkoxy group having 1 to 6 carbon atoms, an alkenyl or alkenyloxy group having 2 to 6 carbon atoms.
In some embodiments of the present invention, the compound of formula ii is present in an amount of 10 to 90% by weight of the total weight of the parent liquid crystal, preferably: 20 to 80%, more preferably: 30 to 75%, more preferably: 30 to 65%, more preferably: 30 to 55%, more preferably: 40-55 percent.
In some embodiments of the present invention, the parent liquid crystal may further comprise a positive liquid crystal compound.
In some embodiments of the present invention, the positive liquid crystal compound comprises:
at least one compound of the formula III
Wherein,
R5represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 12 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 12 carbon atoms;
ring C is independently selected from the group consisting of 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl, and indan-2, 5 diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O, one or more H in the 1, 4-phenyl group may be substituted by halogen or CN;
ring D and ring E are each independently selected from the group consisting of 1, 4-cyclohexyl, 1, 4-cyclohexenyl, 1, 4-phenyl, and indan-2, 5 diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O, one or more H in the 1, 4-phenyl group may beSubstituted by halogen or CN;
Z5represents-CO-, -OC-, -OCO-, -COO-, -CF2O-、-OCF2-、-CH2O-、-OCH2-、-CH2CH2-、-CF2CF2-、-CF2CH2-, -CF ═ CF-, -CH ═ CH-, -C ≡ C-, or a single bond;
L1and L2Each independently represents-H, -F, -CN or-Cl;
L3represents-F, -CN, -CF3or-OCF3;
a. c each independently represents 0, 1,2 or 3.
In some embodiments of the present invention, the compound represented by formula iii is selected from one or more of the following compounds:
wherein,
R5represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 12 carbon atoms, a halogenated or non-halogenated alkenyl or alkenyloxy group having 2 to 12 carbon atoms;
L1and L2Each independently represents-H, -F, -CN or-Cl.
In some embodiments of the present invention, the compound of formula iii is present in an amount of 10 to 80% by weight of the total weight of the parent liquid crystal, preferably: 20 to 75%, more preferably: 30 to 75%, more preferably: 30 to 65%, more preferably: 30 to 60%, more preferably: 35 to 50 percent.
In some embodiments of the present invention, the dichroic dye molecule is selected from the group consisting of azo, anthraquinone, phthalocyanine, cyanine, indigoid, arylmethane, nitro and nitroso groups.
In some embodiments of the present invention, it is preferable that the dichroic dye is selected from one or more of azo type, anthraquinone type and combination thereof.
In some embodiments of the present invention, the dichroic dye comprises from 0.01% to 10%, preferably from 0.01% to 8%, more preferably from 0.01% to 5%, even more preferably from 0.05% to 3%, even more preferably from 0.1% to 3% by weight of the total guest-host liquid crystal composition.
In some embodiments of the invention, the dye has a dichroic ratio of 2 to 20, preferably the dye has a dichroic ratio of 5 to 15.
Stabilizers which can be added to the parent liquid crystal of the present invention are mentioned below.
Preferably, the stabilizer is selected from the group consisting of the stabilizers shown below.
In an embodiment of the present invention, it is preferred that the stabilizer is 0 to 5% by weight of the total weight of the mother liquid crystal; more preferably, the stabilizer accounts for 0-2% of the total weight of the liquid crystal composition; as a particularly preferred embodiment, the stabilizer is 0.001 to 1% by weight based on the total weight of the liquid crystal composition.
Compared with the prior art, the light adjusting device has the advantages that the guest-host liquid crystal composition is arranged between the upper substrate and the lower substrate; the light modulation device is used for temperature control light modulation, has a simpler structure, greatly improves the light transmittance, and has the advantages of low cost and simple and convenient production and manufacture. And the dark state can realize the absorption of specific wave bands of visible light, and the color effect is realized.
When the light modulation device is at the temperature below the clearing point, the guest-host liquid crystal composition is vertically arranged between the upper substrate and the lower substrate, no or little light absorption occurs in the guest-host layer, and the device is in a bright state. When the temperature is above the clearing point, the liquid crystal layer is in a clear state, the dye molecules are in a disordered state, light can be absorbed, and the device is in a dark state.
Drawings
FIG. 1 is a schematic view of a liquid crystal display according to the present invention.
Detailed Description
The shorthand codes of the test items in the embodiments are respectively expressed as:
T-30℃low temperature storage phase transition temperature (. degree. C.)
Cp clearing Point (C, nematic-isotropic phase transition temperature)
Δ n optical anisotropy (589nm, 20 ℃ C.)
Eta volume viscosity (mm)2S, at 20℃)
Delta epsilon dielectric anisotropy (1KHz, 25 ℃ C.)
T transmittance (DMS 505 box thickness 6 μm)
Conditions for measuring transmittance:
the DMS 505 was used to test the transmittance of the dimmer device at clearing point + -10 deg.C, which was 6 μm thick.
In the liquid crystal display device of the present invention, the dye in the guest-host liquid crystal composition may be formulated from a single dye (the dye is available from an outsource route) into a combined dye, and the dye is azo-based or anthraquinone-based or a combination of both, and in some embodiments, the dye is selected from one or more of table 1, and the dye forms a liquid crystal composition with the liquid crystal molecules. The dyes are all available from the outsourcing route.
TABLE 1 molecular Structure of the dyes and wavelength of maximum absorption
One or more single dyes are selected according to the requirement to prepare a dye composition, and the dye composition is mixed with liquid crystal molecules in proportion by adopting the modes of heating, ultrasonic waves, suspension and the like and is dissolved to obtain the guest-host liquid crystal composition.
In the following examples, for the convenience of expression of the respective liquid crystal compounds, the group structures of the liquid crystal compounds are represented by the codes listed in Table 2:
TABLE 2 radical structural code of liquid crystal compounds
Compounds of the following formula are exemplified:
the structural formula is shown asExpressed by the codes listed in Table 2, this can be expressed as: 3 in the 3CWO2, wherein 3 in the code represents the number of C atoms in the left alkyl group, i.e., the alkyl group is-C3H7(ii) a C in the code represents cyclohexane; w in the code represents a benzene plus two lateral F substituted structures, and O in the code represents an oxygen atom; 2 in the code represents the number of C atoms of the alkyl group at the right end, that is, the alkyl group is-C2H5。
In the liquid crystal composition of the present invention, the liquid crystal composition is a nematic liquid crystal composition, and the various liquid crystal components contained in the liquid crystal composition are all compounds known in the art, and can be synthesized by a conventional method by those skilled in the art.
Fabrication of light modulating devices
The liquid crystal display of the present invention, as shown in FIG. 1, includes an upper substrate and an upper alignment layer and a lower substrate and a lower alignment layer attached to each other, and a layer of guest-host liquid crystal composition is poured between the upper and lower alignment layers. The inner surfaces of the upper substrate and the lower substrate are respectively coated with a vertical alignment layer to realize the control of the liquid crystal alignment.
Example 1
The parent liquid crystal 1 of example 1, prepared with the compounds and weight percentages listed in table 3, was filled between two substrates of a liquid crystal display and tested for performance, the test data being shown in the following table:
TABLE 3 composition and compounding ratio of mother liquid crystal
To the mother liquid crystal 1, 0.35% of dye 13+ 0.15% of dye 7+ 1% of dye 25 was added to form a guest-host liquid crystal composition a1, and 0.7% of dye 13+ 0.3% of dye 7+ 2% of dye 25 was added to form a guest-host liquid crystal composition B1, and the guest-host liquid crystal composition was filled in the light control device of the present invention, and the ambient temperature of the device was adjusted to cause a change in brightness, and the change in transmittance was as shown in table 4:
TABLE 4
Transmittance change (Bright → dark) | |
Guest-host liquid crystal composition A1 | 65%→40% |
Guest-host liquid crystal composition B1 | 38%→18% |
As can be seen from table 4, when the ambient temperature of the dimming device is lower than 42 ℃, the device is in a bright state; when the ambient temperature of the device is higher than 42 ℃, the device is in a dark state, and the device completely absorbs visible light wave bands when in the dark state.
Example 2
The parent liquid crystal 2 of example 2, prepared with the compounds and weight percentages listed in table 5, was filled between two substrates of a liquid crystal display and tested for performance, the test data being shown in the following table:
TABLE 5 composition and compounding ratio of mother liquid crystal
To the mother liquid crystal 2, 0.35% dye 13+ 0.15% dye 7+ 1% dye 25 was added to form a guest-host liquid crystal composition A2, and 0.7% dye 13+ 0.3% dye 7+ 2% dye 25 was added to form a guest-host liquid crystal composition B2, the transmittance change of which is shown in Table 6:
TABLE 6
Transmittance change (Bright → dark) | |
Guest-host liquid crystal composition A2 | 59%→38% |
Guest-host liquid crystal composition B2 | 39%→18% |
As can be seen from table 6, when the ambient temperature of the light modulation device is lower than 25 ℃, the device is in a bright state; when the ambient temperature of the device is higher than 25 ℃, the device is in a dark state, and the device completely absorbs visible light wave bands when in the dark state.
Example 3
The parent liquid crystal 3 of example 3, prepared with the compounds and weight percentages listed in table 7, was filled between two substrates of a liquid crystal display and tested for performance, the test data being shown in the following table:
TABLE 7 composition and compounding ratio of mother liquid crystal
To the mother liquid crystal 3, 0.35% dye 13+ 0.15% dye 7+ 1% dye 25 was added to form a guest-host liquid crystal composition A3, whose transmittance varied as shown in Table 8:
TABLE 8
Transmittance change (Bright → dark) | |
Guest-host liquid crystal composition A3 | 41%→16% |
As can be seen from table 8, when the ambient temperature of the light modulation device is lower than 50 ℃, the device is in a bright state; when the ambient temperature of the device is higher than 50 ℃, the device is in a dark state, and the device completely absorbs visible light wave bands when in the dark state.
Example 4
The parent liquid crystal 4 of example 9, prepared with the compounds and weight percentages listed in table 9, was filled between two substrates of a liquid crystal display and tested for performance, the test data are shown in the following table:
TABLE 9 composition and compounding ratio of mother liquid crystal
To the mother liquid crystal 4, 0.2% dye 7+ 1.6% dye 25 was added to form a guest-host liquid crystal composition C1, whose transmittance varied as shown in Table 10:
watch 10
Transmittance change (Bright → dark) | |
Guest-host liquid crystal composition C1 | 55%→28% |
As can be seen from table 10, when the ambient temperature of the dimming device is lower than 60 ℃, the device is in a bright state; when the ambient temperature of the device is higher than 60 ℃, the device is in a dark state, and the device absorbs a specific wave band of visible light (620 +/-30 nm) in the dark state, so that the device is blue.
Example 5
The parent liquid crystal 5 of example 5, prepared with the compounds and weight percentages listed in table 11, was filled between two substrates of a liquid crystal display and tested for performance, the test data being shown in the following table:
TABLE 11 composition and compounding ratio of the parent liquid crystals
To the precursor liquid crystal 5, 1.5% of dye 7 was added to form a guest-host liquid crystal composition D1, whose transmittance varied as shown in Table 12:
TABLE 12
Transmittance change (Bright → dark) | |
Guest-host liquid crystal composition D1 | 60%→35% |
As can be seen from table 12, when the ambient temperature of the dimming device is lower than 60 ℃, the device is in a bright state; when the ambient temperature of the device is higher than 60 ℃, the device is in a dark state, and absorbs a specific wave band of visible light (550 +/-30 nm) when the device is in the dark state, so that the device is purple.
Due to the adoption of the design, the device can realize dimming without using a polaroid and an electrode layer, and can achieve high transmittance. Through actual measurement, the light dimming device can realize color depth change and conversion between light and dark states through the temperature regulation and control device, and meanwhile, compared with the existing electric control light dimming device, the light dimming device does not use a polaroid and an electrode layer, so that the manufacturing steps of the light dimming device are simplified, and the cost is saved.
The materials used in the present invention are all commercial materials, and are all commercially available.
The foregoing embodiments have been provided to illustrate the principles and embodiments of the present invention, and the above embodiments are provided only to assist and understand the method and the core idea of the present invention; meanwhile, a person skilled in the art can change the specific mode and the application scope thereof according to the idea of the present invention, and in summary, the information in the description should not be construed as limiting the present invention.
Claims (6)
1. A dimming device comprising a guest-host liquid crystal composition, the dimming device comprising: an upper substrate, a lower substrate, an upper alignment layer, a lower alignment layer, a guest-host liquid crystal composition sandwiched between the upper alignment layer and the lower alignment layer, wherein the guest-host liquid crystal composition comprises a dichroic dye and a mother liquid crystal, wherein the dimming device does not comprise a polarizer and an electrode layer, wherein the mother liquid crystal has a clearing point of 10 to 60 ℃ and comprises at least one neutral liquid crystal compound comprising:
at least one compound represented by the general formula I,
wherein,
R1and R2Each independently represents-H, -F, a halogenated or non-halogenated alkyl or alkoxy group having 1 to 12 carbon atoms, havingHalogenated or non-halogenated alkenyl or alkenyloxy of 2 to 12 carbon atoms;
X1and X2Each independently selected from the group consisting of 1, 2-cyclopropyl, 1, 3-cyclobutyl, 1, 3-cyclopentyl, 1, 4-cyclohexyl, 1, 4-cyclohexenyl, piperidin-1, 4-diyl, and 1, 4-bicyclo [2,2 ] idene]Octyl, 1, 4-phenyl, pyridine-2, 5-diyl, pyrimidine-2, 5-diyl, naphthalene-2, 6-diyl, trans-decahydronaphthalene-2, 6-diyl, tetrahydronaphthalene-2, 6-diyl and indan-2, 5-diyl; wherein one or two CH groups not directly bonded in the 1, 4-cyclohexyl group2May be replaced by O or S, one or more H in the 1, 4-phenyl group may be substituted by halogen;
Z1and Z2Each independently represents-CO-, -OC-, -OCO-, -COO-, -CF2O-、-OCF2-、-CH2O-、-OCH2-、-CH2CH2-、-CF2CF2-、-CF2CH2-、-CF=CF-、-CH=CH-、-C≡C-、-CH(CH3)CH2-、-CH2CH(CH3)-、-(CH2)3O-、-O(CH2)3-、-COS-、-SCO-、-CH=CF-、-(CH2)4-、-C4F8-、-OCF2CF2O-、-CF2CF2CF2O-、-CH2CH2CF2O-、-CH2CF2OCH2-、-CH=CHCF2O-、-CF2OCH=CH-、-CF2OCF=CH-、-CF2OCH=CF-、-CF=CFCF2O-、-CF2OCF=CF-、-CH=CHCH2CH2-、-C2H4OCH2-、-CH2CH=CHCH2-、-OCH2CH2CH2-、-CF=CF-CF=CF-、-C≡C-CF=CF-、-C≡C-CF=CF-C≡C-、-CF=CF-C≡C-CF=CF-、-C≡C-CF2O-or a single bond, when a plurality of X's are present2And Z2When they are the same or different;
p represents 0, 1,2 or 3.
2. A dimming device comprising a guest-host liquid crystal composition according to claim 1, wherein the parent liquid crystal further comprises a negative liquid crystal compound.
3. A dimming device comprising a guest-host liquid crystal composition according to claim 1, wherein the parent liquid crystal further comprises a positive liquid crystal compound.
4. A dimming device comprising a guest-host liquid crystal composition according to claim 1, wherein the dichroic dye is selected from one or more of blue dye, red dye, green dye, orange dye and violet dye.
5. A dimming device comprising a guest-host liquid crystal composition according to claim 1, wherein both the upper alignment layer and the lower alignment layer are homeotropically aligned.
6. A dimming device comprising a guest-host liquid crystal composition according to claim 5, wherein the pretilt angles of the vertical alignment layers of the upper and lower substrates are 85 ° to 89 °.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611157761.3A CN108227271B (en) | 2016-12-15 | 2016-12-15 | Light modulation device containing guest-host liquid crystal composition |
TW106143179A TWI652528B (en) | 2016-12-15 | 2017-12-08 | Light-adjusting device containing guest-host liquid crystal composition |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611157761.3A CN108227271B (en) | 2016-12-15 | 2016-12-15 | Light modulation device containing guest-host liquid crystal composition |
Publications (2)
Publication Number | Publication Date |
---|---|
CN108227271A CN108227271A (en) | 2018-06-29 |
CN108227271B true CN108227271B (en) | 2021-03-16 |
Family
ID=62650346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201611157761.3A Active CN108227271B (en) | 2016-12-15 | 2016-12-15 | Light modulation device containing guest-host liquid crystal composition |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN108227271B (en) |
TW (1) | TWI652528B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111103736B (en) * | 2018-10-26 | 2022-10-28 | 江苏和成显示科技有限公司 | Guest-host liquid crystal medium and guest-host liquid crystal light modulation device |
CN109370615B (en) * | 2018-11-26 | 2020-09-15 | 深圳市国华光电科技有限公司 | Application of zwitterionic dopant in preparation of liquid crystal material based on dynamic scattering mode |
CN114410313A (en) * | 2022-01-18 | 2022-04-29 | 苏州汉朗光电有限公司 | Liquid crystal composition and wide-temperature high-contrast liquid crystal dimming device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080079564A (en) * | 2007-02-27 | 2008-09-01 | 양재우 | Guest host mode type plastic liquid crystal display |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101059607A (en) * | 2006-04-17 | 2007-10-24 | 孙刚 | Electrically-controlled liquid crystal light modulation glass and film |
JP5029032B2 (en) * | 2007-01-23 | 2012-09-19 | 三菱化学株式会社 | Dichroic dye composition, liquid crystal composition containing the same, and liquid crystal element |
CN104774622B (en) * | 2014-01-15 | 2018-01-26 | 江苏和成显示科技股份有限公司 | Negative liquid crystal composition and the display device comprising the liquid-crystal composition |
KR20150109543A (en) * | 2014-03-19 | 2015-10-02 | 삼성디스플레이 주식회사 | Liquid crystal composition and liquid crystal display device comprising the same |
CN106125358B (en) * | 2016-06-27 | 2019-04-16 | 华南师范大学 | A kind of trans- dimming glass and preparation method thereof based on electroresponse |
-
2016
- 2016-12-15 CN CN201611157761.3A patent/CN108227271B/en active Active
-
2017
- 2017-12-08 TW TW106143179A patent/TWI652528B/en active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080079564A (en) * | 2007-02-27 | 2008-09-01 | 양재우 | Guest host mode type plastic liquid crystal display |
Also Published As
Publication number | Publication date |
---|---|
TWI652528B (en) | 2019-03-01 |
TW201825981A (en) | 2018-07-16 |
CN108227271A (en) | 2018-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108663866B (en) | Light modulation device containing guest-host liquid crystal composition | |
TWI631208B (en) | Device containing a liquid-crystalline medium | |
CN109476994B (en) | Switching layer for optical switching elements | |
TWI654281B (en) | Composite liquid crystal composition, display element and electric field detector | |
CN108227271B (en) | Light modulation device containing guest-host liquid crystal composition | |
US11762241B2 (en) | Device for the regulation of light transmission | |
TW201510190A (en) | Liquid crystal polymer composition, method for preparing same, and liquid crystal article comprising same | |
WO2020254219A1 (en) | Liquid crystal-based light valve | |
CN115667461A (en) | Liquid-crystalline medium | |
CN116917270A (en) | Anthraquinone compound, liquid crystal composition containing same, and light adjusting element | |
US20240052243A1 (en) | Anthraquinone Compound-Containing Liquid Crystal Composition For Controlling Light, Photocured Product Thereof, And Light-Controlling Element | |
US11952528B2 (en) | Switching layers for use in a switching element | |
CN113874469A (en) | Method for producing a liquid crystal-based switching element | |
WO2021230030A1 (en) | Method for manufacturing polymer dispersed liquid crystal display element, and polymer dispersed liquid crystal display element | |
WO2022191169A1 (en) | Anthraquinone compound, liquid crystal composition containing said compound, and dimming element | |
CN113946079A (en) | Liquid-crystalline medium | |
JP2020139153A (en) | Liquid crystal composition for polymer network type liquid crystal element, polymer network type liquid crystal display element using the liquid crystal composition, and production method of the same | |
US20240134218A1 (en) | Device for the regulation of light transmission | |
CN117795407A (en) | Switching layer for window element | |
WO2023080198A1 (en) | Anthraquinone compound, liquid crystal composition containing said compound, and light-controlling element | |
CN111505878A (en) | Thermal transition liquid crystal-based film, preparation method thereof and intelligent window | |
KR20240116703A (en) | Anthraquinone compound, liquid crystal composition containing the compound, and light control device | |
CN116736592A (en) | Liquid crystal element, liquid crystal display device, light adjusting device, or light transmitting device | |
JP2005208411A (en) | Dimmer element | |
JP2018095719A (en) | Dichroic compound, liquid crystal composition and liquid crystal element |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CP02 | Change in the address of a patent holder | ||
CP02 | Change in the address of a patent holder |
Address after: 2/F, Sino Japan Cooperation Innovation Park, No. 16 Zidan Road, Qinhuai District, Nanjing, Jiangsu Province, 210014 Patentee after: JIANGSU HECHENG DISPLAY TECHNOLOGY Co.,Ltd. Address before: 212212 east side of Yangzhong Yangtze River Bridge, Yangzhong City, Jiangsu Province Patentee before: JIANGSU HECHENG DISPLAY TECHNOLOGY Co.,Ltd. |