WO2018173767A1 - Indicateur de charge - Google Patents

Indicateur de charge Download PDF

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Publication number
WO2018173767A1
WO2018173767A1 PCT/JP2018/008933 JP2018008933W WO2018173767A1 WO 2018173767 A1 WO2018173767 A1 WO 2018173767A1 JP 2018008933 W JP2018008933 W JP 2018008933W WO 2018173767 A1 WO2018173767 A1 WO 2018173767A1
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liquid crystal
static electricity
crystal composition
composition
group
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PCT/JP2018/008933
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English (en)
Japanese (ja)
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長谷部　浩史
士朗 谷口
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Dic株式会社
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Priority to CN201880012457.0A priority Critical patent/CN110300898A/zh
Priority to JP2018545515A priority patent/JP6607420B2/ja
Publication of WO2018173767A1 publication Critical patent/WO2018173767A1/fr

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  • the present invention relates to a charging indicator for visualizing a charged state.
  • JP 2004-225200 A JP-A-7-159467 JP-A-11-211771
  • the problem to be solved by the present invention is to provide a charged place that changes every moment on a wide plane and a static electricity indicator that visualizes the amount of charge.
  • the static electricity indicator using the liquid crystal composition of the present invention can visualize the charged state of the target substance on a wide flat surface and the charged amount and its charge amount which change every moment. Useful for.
  • the figure which shows an example of a structure of the static electricity indicator of this invention typically (when there is no charged object nearby)
  • the figure which shows an example of a structure of the static electricity indicator of this invention typically (when the electrode by the side of a charging body is divided into plurality)
  • the static electricity indicator shown in FIG. 3 is seen from above (charged body side) ITO patterning diagram Liquid crystal composition and adhesive dripping position Position of ITO patterning substrate and ITO solid substrate (Substrate short side) Appearance of the electrostatic indicator of the present invention
  • the electrostatic indicator of the present invention can visualize the charged state of a target substance on a wide plane and the charged place and its charged position.
  • the spread flat shape may be a shape of the static electricity indicator such as a triangle, a quadrangle, a disk shape, a rod shape, and the like. It means that it may be curved as well. It is one of the advantages of using a liquid crystal composition that the electrostatic indicator of the present invention can be curved.
  • the static electricity indicator may be a single device or a plurality of static electricity indicators may be combined into a single device.
  • the static electricity indicator may be plate-shaped, sheet-shaped, or belt-shaped, and when they are installed, they can be installed as they are, but they are cut to adapt to the required range. It can also be installed. These include rolling and transporting a sheet-like or belt-like static electricity indicator and cutting it to a length suitable for the installation location when installing.
  • the static electricity indicator uses a liquid crystal composition.
  • a change in refractive index anisotropy ( ⁇ n) may be used depending on the change in the alignment state, or a change in the polarization state may be used.
  • What controls scattering may be used, and what is called a guest host system which adds a pigment to a liquid crystal composition may be used. The higher the charged position, the larger the change in the alignment state of the liquid crystal composition, so that the height of the charged position can be visually recognized.
  • liquid crystal composition (Liquid crystal composition)
  • the liquid crystal composition used is a so-called n-type liquid crystal composition having a negative ⁇ value, even if it is a so-called p-type liquid crystal composition having a positive dielectric anisotropy ( ⁇ ). Also good.
  • These liquid crystal compositions are used by appropriately combining a compound represented by general formula (J), a compound represented by general formula (N-1), and a compound represented by general formula (L). I can do it.
  • the p-type liquid crystal composition preferably contains one or more compounds represented by the general formula (J). These compounds correspond to dielectrically positive compounds ( ⁇ is greater than 2).
  • R J1 represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH ⁇ CH—, — Optionally substituted by C ⁇ C—, —O—, —CO—, —COO— or —OCO—, n J1 represents 0, 1, 2, 3 or 4;
  • a J1 , A J2 and A J3 are each independently (A) 1,4-cyclohexylene group (this is present in the group one -CH 2 - or nonadjacent two or more -CH 2 - may be replaced by -O-.)
  • the group (a), the group (b) and the group (c) are each independently selected from the group consisting of cyano group, fluorine atom, chlorine atom, methyl group, trifluoromethyl group or trifluoro May be substituted with a methoxy group
  • Z J1 and Z J2 are each independently a single bond, —CH 2 CH 2 —, — (CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, Represents —COO—, —OCO— or —C ⁇ C—
  • n J1 is 2, 3 or 4 and a plurality of A J2 are present, they may be the same or different, and n J1 is 2, 3 or 4 and a plurality of Z J1 is present.
  • X J1 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, or a 2,2,2-trifluoroethyl group.
  • the n-type liquid crystal composition preferably contains one or more compounds selected from the compounds represented by formula (N-1). These compounds correspond to dielectrically negative compounds (the sign of ⁇ is negative and the absolute value is greater than 2).
  • R N11 and R N12 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or non-adjacent two or more —CH 2 — in the alkyl group are each independently Optionally substituted by —CH ⁇ CH—, —C ⁇ C—, —O—, —CO—, —COO— or —OCO—,
  • C Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl
  • R L1 and R L2 each independently represents an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently Optionally substituted by —CH ⁇ CH—, —C ⁇ C—, —O—, —CO—, —COO— or —OCO—, n L1 represents 0, 1, 2 or 3,
  • a L1 , A L2 and A L3 each independently represent (a) a 1,4-cyclohexylene group (one —CH 2 — present in the group or two or more —CH 2 — not adjacent to each other).
  • the group (a), the group (b) and the group (c) may be each independently substituted with a cyano group, a fluorine atom or a chlorine atom
  • n L1 is 2 or 3 and a plurality of A L2 are present, they may be the same or different, and when n L1 is 2 or 3, and a plurality of Z L2 are present, May be the same or different, but excludes the compounds represented by formulas (N-1) and (J).
  • the composition preferably exhibits a liquid crystal phase at room temperature (25 ° C.), and more
  • the types of compounds that can be combined are used in combination according to desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence.
  • desired properties such as solubility at low temperatures, transition temperatures, electrical reliability, and birefringence.
  • the general formula (N) It is preferable to increase the content of the compounds represented by -1) and (J). To reduce ⁇ , it is preferable to increase the content of the compound represented by the general formula (L).
  • the voltage holding ratio of the liquid crystal composition is not so high.
  • Specific values of the voltage holding ratio are 20 to 95 when injected into a liquid crystal cell with a cell gap of 5 ⁇ m and measured at room temperature (25 ° C.) with a drive voltage of 5 V, a frame time of 16.6 ms, and a voltage application time of 64 ⁇ s. %, Preferably 40 to 90%, more preferably 50 to 80%.
  • the specific resistance of the liquid crystal composition is not so high in order to increase the speed of returning to the original alignment state when the charged potential of the detection target is lowered.
  • a cyano group as the polar substituent of the groups (a), (b) and (c) in the general formulas (J) and (N-1).
  • it is preferably in the range of 1 ⁇ 10 7 to 1 ⁇ 10 12 cm ⁇ at 25 ° C., more preferably in the range of 1 ⁇ 10 8 to 1 ⁇ 10 11 cm ⁇ , and 5 ⁇ 10 8 to 5 A range of ⁇ 10 10 cm ⁇ is particularly preferred.
  • the voltage holding ratio of the liquid crystal composition is used for the purpose of analyzing the instantaneous charged state later by holding and storing the charged state. Is preferably increased.
  • a fluorine atom, a chlorine atom, a trifluoromethyl group, a fluoromethoxy group as a polar substituent of the groups (a), (b), and (c) in the general formulas (J) and (N-1) A difluoromethoxy group, a trifluoromethoxy group or a 2,2,2-trifluoroethyl group is preferably used, and a fluorine atom is more preferable.
  • the specific value of the voltage holding ratio is 95% or more when injected into a liquid crystal cell with a cell gap of 5 ⁇ m and measured at room temperature (25 ° C.) with a drive voltage of 5 V, a frame time of 16.6 ms, and a voltage application time of 64 ⁇ s. Preferably, it is 97% or more, more preferably 99% or more. Even if the charged potential of the object to be detected decreases, the voltage holding ratio of the liquid crystal composition is used for the purpose of analyzing the instantaneous charged state later by holding and storing the charged state. Is preferably increased.
  • a fluorine atom, a chlorine atom, a trifluoromethyl group, a fluoromethoxy group, a polar substituent of the groups (a), (b), and (c) in the general formulas (J) and (N-1) is preferably used, and a fluorine atom is more preferable. Specifically, it is preferably 1 ⁇ 10 12 cm ⁇ or more, more preferably 1 ⁇ 10 13 cm ⁇ or more, and particularly preferably 1 ⁇ 10 14 cm ⁇ or more.
  • Sensitivity can be adjusted by the distance between the grounded electrode and the other electrode.
  • the distance between the electrodes is preferably 20 ⁇ m or less, more preferably 10 ⁇ m or less, and particularly preferably 5 ⁇ m or less. It is also effective to increase the absolute value of the dielectric anisotropy of the liquid crystal composition. Specifically, it is preferably adjusted to 2 or more, more preferably 5 or more, and still more preferably 8 or more.
  • a dichroic dye that is usually used can be suitably used.
  • the dichroic dye an azo dye or an anthraquinone dye is preferable. This method is preferable because it is not necessary to use a polarizing plate, which will be described later, and the configuration of the apparatus becomes simple.
  • dichroic dyes SI-486 (yellow), SI-426 (red), M-483 (blue), M-412 (blue), M-811 (blue), S-of Mitsui Chemicals Fine Co., Ltd.
  • a so-called polymer dispersed liquid crystal is preferably used.
  • a liquid crystal composition to which a polymerizable compound is added so that the liquid crystal composition is dispersed in the polymer chain and curing the polymerizable compound a polymer dispersed liquid crystal can be obtained.
  • a substrate used for the static electricity indicator in the present invention a substrate usually used for a liquid crystal device, a display, an optical component or an optical film can be suitably used. Examples of such a substrate include organic materials such as a glass substrate, a metal substrate, a ceramic substrate, and a plastic substrate.
  • the substrate when the substrate is an organic material, examples thereof include cellulose derivatives, polyolefins, polyesters, polyolefins, polycarbonates, polyacrylates, polyarylates, polyether sulfones, polyimides, polyphenylene sulfides, polyphenylene ethers, nylons, and polystyrenes.
  • plastic substrates such as polyester, polystyrene, polyolefin, cellulose derivatives, polyarylate, and polycarbonate are preferable.
  • a shape of a base material you may have a curved surface other than a flat plate. These base materials may have an electrode layer, an antireflection function, and a reflection function as needed. It is preferable that at least the substrate present between the liquid crystal composition and the observer is transparent.
  • the substrate is preferably flexible. Being flexible, it can be made into a roll shape when carrying the static electricity indicator, and can be bent according to the shape of the object to observe static electricity or the shape of the installation location. (electrode) Even if an electrode is individual, 2 or more may be 1 set. When it is single, the electrode is preferably grounded. In the case of using a plurality of electrodes, it is preferable that at least one of them is grounded. When using a plurality of electrodes, there may be a plurality of electrodes that are not grounded to the counter electrode for one electrode that is grounded, and a ground to the counter electrode for one electrode that is not grounded There may be a plurality of electrodes.
  • the electrode may have an electrode that is grounded on one base material and an electrode that is not grounded on the other base material when the static electricity indicator has a shape in which two base materials sandwich the liquid crystal composition. There may be both an electrode that is grounded only on one substrate and an electrode that is not grounded. More preferably, there is an embodiment in which there is an electrode grounded on one base material and an electrode not grounded on the other base material.
  • one electrode is connected (grounded) to a potential reference to function as an electrostatic indicator. Further, in order to measure the potential distribution, the electrode on the side not connected to the potential reference is arranged on the grid (two-dimensionally). Thus, the charging position of the object can be specified by arranging a plurality of electrodes on the static electricity indicator.
  • a conductive metal oxide can be used as a material for the transparent electrode, and examples of the metal oxide include indium oxide (In 2 O 3 ), tin oxide (SnO 2 ), and zinc oxide ( ZnO), indium tin oxide (In 2 O 3 —SnO 2 ), indium zinc oxide (In 2 O 3 —ZnO), niobium-doped titanium dioxide (Ti 1-x Nb x O 2 ), fluorine-doped tin oxide, graphene nanoribbon Alternatively, metal nanowires or the like can be used, but zinc oxide (ZnO), indium tin oxide (In 2 O 3 —SnO 2 ), or indium zinc oxide (In 2 O 3 —ZnO) is preferable.
  • the liquid crystal composition may be approximately vertically aligned with respect to the substrate, or may be approximately horizontally aligned. good.
  • the p-type liquid crystal composition it is preferably horizontally aligned.
  • an n-type liquid crystal composition it is preferable that it is vertically aligned.
  • the substrate may be subjected to an alignment treatment or may be provided with an alignment film.
  • the alignment treatment include stretching treatment, rubbing treatment, polarized ultraviolet (visible?) Light irradiation treatment, ion beam treatment, and oblique deposition of SiO 2 on the substrate.
  • the alignment film a known and conventional alignment film is used.
  • alignment films include polyimide, polysiloxane, polyamide, polyvinyl alcohol, polycarbonate, polystyrene, polyphenylene ether, polyarylate, polyethylene terephthalate, polyether sulfone, epoxy resin, epoxy acrylate resin, acrylic resin, coumarin compound, chalcone.
  • the compound examples include compounds, cinnamate compounds, fulgide compounds, anthraquinone compounds, azo compounds, and arylethene compounds.
  • the compound subjected to the alignment treatment by rubbing is preferably an alignment treatment or a compound in which crystallization of the material is promoted by inserting a heating step after the alignment treatment.
  • the alignment film is generally formed by applying the alignment film material on a substrate by a method such as spin coating to form a resin film, but a uniaxial stretching method, Langmuir-Blodgett method, or the like can also be used. .
  • a polymerized optical anisotropic body (positive A plate) in a state where the polymerizable liquid crystal composition is homogeneously aligned may be used.
  • a polarizing plate can be used in addition to using the dichroic dye.
  • the deflecting plate can be installed so as to be normally white or normally black in a normal liquid crystal element. Any polarizing plate used for a normal liquid crystal display element can be preferably used.
  • Color filter The electrostatic indicator of the present invention may have a color filter.
  • the color filter includes a black matrix and at least an RGB three-color pixel portion. Any method may be used for forming the color filter layer. According to an example, a color filter layer is formed by applying a color coloring composition containing a pigment carrier and a color pigment dispersed therein to form a predetermined pattern, and curing this to obtain a colored pixel, and a color filter layer. Can be formed.
  • a color coloring composition containing a pigment carrier and a color pigment dispersed therein to form a predetermined pattern, and curing this to obtain a colored pixel, and a color filter layer.
  • an organic pigment and / or an inorganic pigment can be used as the pigment contained in the color coloring composition.
  • the color coloring composition may contain one kind of organic or inorganic pigment, and may contain a plurality of kinds of organic pigments and / or inorganic pigments.
  • the pigment preferably has high color developability and high heat resistance, particularly high heat decomposition resistance, and an organic pigment is usually used.
  • ground In the electrostatic indicator of the present invention, the higher the charged potential of the object, the higher the induced charged potential appearing on the electrode that is not grounded. As a result, the change in the alignment state of the liquid crystal composition increases, Can be visualized.
  • Grounding may be performed at a place where a reference potential is desired. Examples of the grounding method include a method in which the electrode is directly connected to the reference potential portion, and a method in which the electrode is connected to the reference potential portion with a conductor such as a copper wire.
  • the charged potential at the portion where the electrodes are arranged can be known.
  • the wiring for grounding the electrodes may be provided for each electrode, but all may be grounded as the same wiring as shown in FIG. Moreover, it is preferable that the induction charging electrodes are insulated from each other.
  • the insulating wall is preferably formed so as to connect the two substrates and so as to surround the liquid crystal. By doing so, the insulating wall serves to keep the distance between the two substrates constant, and at the same time serves as a partition that prevents the liquid crystal from leaking outside.
  • the indicator can be easily cut to any length with scissors or a cutter.
  • cutting is performed along an assumed cutting line indicated by a one-point difference line in FIG. 5, there is no risk of liquid crystal leaking to the outside, so cutting at this position is preferable.
  • the strip-shaped static electricity indicator it is preferable to cut the strip-shaped static electricity indicator so that it can be cut at the insulating wall portion.
  • the measured characteristics are as follows.
  • T ni Nematic phase-isotropic liquid phase transition temperature (° C.) ⁇ n: Refractive index anisotropy at 298K ⁇ : Dielectric anisotropy at 298K ⁇ : Viscosity at 293K (mPa ⁇ s) ⁇ 1 : rotational viscosity at 298 K (mPa ⁇ s) VHR: Voltage holding ratio (%) at 333 K under conditions of frequency 60 Hz and applied voltage 5 V In the examples, the following abbreviations are used for the description of compounds. (Ring structure)
  • composition P1 had a T ni of 81 ° C., ⁇ n of 0.098, ⁇ of 2.4, ⁇ 1 of 35 mPa ⁇ s, VHR of 99.1%, and a specific resistance of 1 ⁇ 10 13 ⁇ cm or more.
  • Reference Example 2 Preparation of Composition P2 Composition P2 shown in the table below was prepared.
  • T ni of the composition P2 is 100 ° C.
  • [Delta] n is 0.100
  • [Delta] [epsilon] is 8.1
  • gamma 1 is 72 MPa ⁇ s
  • VHR is 99.1%
  • the specific resistance was 1 ⁇ 10 13 ⁇ cm or more.
  • T ni of the composition P3 is 78 ° C.
  • [Delta] n is 0.102
  • [Delta] [epsilon] is 2.3
  • gamma 1 is 38 mPa ⁇ s
  • VHR is 99.2%
  • the specific resistance was 1 ⁇ 10 13 ⁇ cm or more.
  • composition P5 In composition P4, T ni was 73 ° C., ⁇ n was 0.107, ⁇ was 11.7, ⁇ 1 was 78 mPa ⁇ s, VHR was 98.0%, and the specific resistance was 1 ⁇ 10 13 ⁇ cm or more. (Reference Example 5) Preparation of Composition P5 Composition P5 shown in the table below was prepared.
  • T ni of the composition P4 is 87 ° C.
  • [Delta] n is 0.117
  • [Delta] [epsilon] is 6.3
  • gamma 1 is 54 MPa ⁇ s
  • VHR is 99.3%
  • the specific resistance was 1 ⁇ 10 13 ⁇ cm or more.
  • Composition N1 had a T ni of 76 ° C., ⁇ n of 0.098, ⁇ of ⁇ 3.7, ⁇ 1 of 89 mPa ⁇ s, VHR of 99.0%, and a specific resistance of 1 ⁇ 10 13 ⁇ cm or more.
  • Reference Example 7 Preparation of Composition N2 Composition N2 shown in the table below was prepared.
  • Composition N2 had a T ni of 91 ° C., ⁇ n of 0.115, ⁇ of ⁇ 4.0, ⁇ 1 of 121 mPa ⁇ s, VHR of 99.3%, and a specific resistance of 1 ⁇ 10 13 ⁇ cm or more.
  • Reference Example 8 Preparation of Composition N3 Composition N3 shown in the table below was prepared.
  • Composition N3 had a T ni of 76 ° C., ⁇ n of 0.114, ⁇ of ⁇ 4.4, ⁇ 1 of 117 mPa ⁇ s, VHR of 99.5%, and a specific resistance of 1 ⁇ 10 13 ⁇ cm or more.
  • Reference Example 9 Preparation of Composition N4 Composition N4 shown in the table below was prepared.
  • Composition N4 had T ni of 73 ° C., ⁇ n of 0.112, ⁇ of ⁇ 4.4, ⁇ 1 of 103 mPa ⁇ s, VHR of 99.4%, and a specific resistance of 1 ⁇ 10 13 ⁇ cm or more.
  • Reference Example 10 Preparation of Composition N5 Composition N5 shown in the table below was prepared.
  • T ni is 76 ° C. of the composition N5, [Delta] n is 0.101, [Delta] [epsilon] is -2.8, gamma 1 is 74mPa ⁇ s, VHR was 99.5%.
  • Reference Example 11 Measurement of physical properties of 4-cyano-4′-pentylbiphenyl (P6) ⁇ n of 4-cyano-4′-pentylbiphenyl is 0.185, ⁇ is 11.0, ⁇ 1 is 46 mPa ⁇ s, VHR was 52% and the specific resistance was 3 ⁇ 10 9 ⁇ cm.
  • composition N3R was prepared by adding 1% by mass of dichroic dye SI-426 manufactured by Mitsui Chemicals Fine Co., Ltd. to composition N3 prepared in Reference Example 8.
  • Example 1 Prepared as a reference example in a TN (twisted nematic: twisted nematic) glass liquid crystal cell with a pair of transparent electrodes facing each other, a polyimide alignment film rubbed on the transparent electrodes, and a distance between the transparent electrodes of 3 ⁇ m The liquid crystal composition P1 thus prepared was injected. A polarizing plate was affixed on both sides of the liquid crystal cell so that the transmission axes were parallel to each other, to produce an electrostatic indicator.
  • TN twisted nematic: twisted nematic
  • This static electricity indicator was in a state of not transmitting light (black) when there was no charged object nearby.
  • a bandegraph static electricity generator (charging part) was installed 15 cm away from the transparent electrode on the non-grounded side of this static electricity indicator. When the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed slightly from being transparent to transmitting. When the vandegraph static electricity generator was turned off, it remained transparent for more than 3 minutes.
  • a bandegraph static electricity generator (charging part) was installed 10 cm away from the transparent electrode on the non-grounded side of the static electricity indicator.
  • the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed from not transmitting light to transmitting.
  • the vandegraph static electricity generator was turned off, it remained transparent for more than 3 minutes.
  • Examples 2 to 6 The same experiment as in Example 1 was performed by changing the liquid crystal composition. The electrostatic indicator was evaluated as ⁇ when the light was slightly transmitted, ⁇ when the light was transmitted, and ⁇ when it was clearly transmitted.
  • Example 7 Prepared as a reference example in a VA (vertical alignment) glass liquid crystal cell having a pair of transparent electrodes facing each other, a polyimide alignment film rubbed on the transparent electrode, and a distance between the transparent electrodes of 3 ⁇ m.
  • the liquid crystal composition N1 was injected.
  • Polarizers were attached to both sides of the liquid crystal cell so that the transmission axes were perpendicular to each other, thereby producing an electrostatic indicator.
  • a copper wire was connected from one transparent electrode and grounded.
  • This static electricity indicator was in a state of not transmitting light (black) when there was no charged object nearby.
  • a bandegraph static electricity generator (charging part) was installed 15 cm away from the transparent electrode on the non-grounded side of this static electricity indicator. When the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed slightly from being transparent to transmitting. When the vandegraph static electricity generator was turned off, it remained transparent for more than 3 minutes.
  • a bandegraph static electricity generator (charging part) was installed 10 cm away from the transparent electrode on the non-grounded side of the static electricity indicator.
  • the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed from not transmitting light to transmitting.
  • the vandegraph static electricity generator was turned off, it remained transparent for more than 3 minutes.
  • Examples 8 to 11 The same experiment as in Example 7 was performed by changing the liquid crystal composition.
  • the electrostatic indicator was evaluated as ⁇ when the light was slightly transmitted, ⁇ when the light was transmitted, and ⁇ when it was clearly transmitted.
  • Example 12 A liquid crystal prepared in a reference example in a VA (Vertical Alignment: Vertical Alignment) liquid crystal cell having a pair of opposing transparent electrodes, a rubbed polyimide alignment film formed on the transparent electrodes, and a distance between the transparent electrodes of 3 ⁇ m Composition N3R was injected to produce an electrostatic indicator.
  • a copper wire was connected from one transparent electrode and grounded. This electrostatic indicator was in a state of transmitting light (transparent) when there was no charged object nearby.
  • a bandegraph static electricity generator (charging part) was installed 15 cm away from the transparent electrode on the non-grounded side of this static electricity indicator. When the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed slightly from transparent to red. When the vandegraph static electricity generator was turned off, the red state was maintained for more than 2 minutes.
  • a bandegraph static electricity generator (charging part) was installed 10 cm away from the transparent electrode on the non-grounded side of the static electricity indicator.
  • the bandegraph static electricity generator was activated and charged to about 2 kV, the static electricity indicator changed from transparent to red.
  • the vandegraph static electricity generator was turned off, the red state was maintained for more than 2 minutes.
  • Example 13 Prepare a PET film substrate with a thickness of 3 cm and a length of 7 cm with a solid ITO transparent electrode and a thickness of 50 ⁇ m, and a PET film substrate with a thickness of 3 cm and a length of 7 cm with a patterned ITO transparent electrode as shown in FIG.
  • a polyimide vertical alignment film was formed on the transparent electrode substrate. As shown in FIG.
  • a copper wire was connected to the solid electrode side and grounded.
  • a bandegraph static electricity generator (charging part) was installed 15 cm away from the static electricity indicator. When the bandegraph static electricity generator was not operated, all three liquid crystal parts were transparent. When the bandegraph static electricity generator was activated and charged to about 2 kV, the liquid crystal part with three static electricity indicators changed to a deeper red color near the charging part. The charge distribution could be visualized. When the vandegraph static electricity generator was turned off, it remained red for about 1 minute.

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Abstract

Le problème décrit par la présente invention est de fournir un indicateur d'électricité statique permettant de visualiser un emplacement chargé qui s'étale spatialement et qui change moment par moment sur une surface plane, ainsi que la quantité de charge de l'emplacement. Suite à diverses recherches, les inventeurs ont utilisé une composition de cristaux liquides et autant d'électrodes que nécessaire, fournissant ainsi un indicateur d'électricité statique grâce auquel il est possible de visualiser une position chargée qui s'étale spatialement et qui change moment par moment sur une surface plane, ainsi que la quantité de charge de la position, sans utiliser un mécanisme mécanique compliqué.
PCT/JP2018/008933 2017-03-23 2018-03-08 Indicateur de charge WO2018173767A1 (fr)

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JP2018545515A JP6607420B2 (ja) 2017-03-23 2018-03-08 帯電インジケータ

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CN111579889B (zh) * 2020-05-28 2021-07-06 浙江大学 一种检测特高压直流输电线下电场强度的装置及方法
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