Partition dimming film, partition dimming device, automobile dimming glass and building dimming glass

Abstract

The utility model relates to a partition dimming film, a partition dimming device and application of the partition dimming film. The partition dimming film comprises a first conducting layer, a second conducting layer and a polymer dispersed liquid crystal layer, wherein the first conducting layer and the second conducting layer are oppositely arranged, and the polymer dispersed liquid crystal layer is clamped between the first conducting layer and the second conducting layer. The first conducting layer is composed of a plurality of independent subareas and at least comprises a first subarea and a second subarea, the light transmittance ratio of the first subarea to the visible light to the second subarea ranges from 1 to 20, and the contrast ratio is larger than 1.3. The partition dimming device comprises the partition dimming film, an electrode part and a power supply controller, and the power supply controller provides adjustable voltage for the independent partitions through the electrode part so as to realize independent control of light transmittance and haze. The light adjusting film and the light adjusting device can achieve adjustment of high light transmittance and low haze, are suitable for various scenes such as intelligent windows, electronic display equipment and building glass, and have wide application prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of light modulation, in particular to a partition light modulation, a partition light modulation device, a car light modulation glass and a building light modulation glass. BACKGROUND

[0002] With the continuous development of the building and automobile industries, the application of light modulation glass is gradually widespread, and its use performance is also more and more concerned by people. The optical performance of light modulation glass has a very important influence on the privacy of space and the visual experience of the observer, and is more and more concerned by people.

[0003] At present, light modulation glass adopts several technologies such as polymer dispersed light modulation and electrochromic, dye liquid crystal, among which polymer dispersed light modulation can provide privacy protection, but cannot provide color change, electrochromic can change the light transmittance of light modulation glass, but cannot provide privacy protection, and the change speed cannot meet the user's requirements, and the dye liquid crystal light modulation film cannot provide privacy performance, and is difficult to package and easy to leak.

[0004] In the utility model application CN117264637A proposed by the applicant, a specific type and amount of dichromatic dye is added to the polymer dispersed liquid crystal layer, so that the PDLC has the effect of stable color change.

[0005] However, the above method cannot meet the individual needs of consumers, for example, under the condition that the light modulation film has light shielding property, different regions form a pattern with privacy through different colors; or different regions of the light modulation film have different light transmittance to meet the different needs of passengers and drivers for light. SUMMARY

[0006] The existing PDLC light modulation film can only adjust the haze, and cannot adjust the contrast and haze at the same time, and the visual experience is single. To solve the above problems, the present application provides a partition light modulation film, which comprises a first conductive layer and a second conductive layer arranged oppositely, a polymer dispersed liquid crystal layer sandwiched between the first conductive layer and the second conductive layer, the first conductive layer is composed of several independent partitions, at least including a first partition and a second partition, characterized in that the transmittance ratio of visible light of the first partition and the second partition is between 1-20; the contrast of the first partition and the second partition is greater than 1.3.

[0007] Further, the contrast of the first partition and the second partition is greater than 2.

[0008] Further, the first partition or the second partition has a haze greater than 90% in a non-powered state.

[0009] Further, the first partition or the second partition has a haze less than 5% in a powered state.

[0010] Further, the first partition or the second partition has a haze greater than 5% in the energized state.

[0011] Further, the first partition and the second partition have the same haze in the energized state, and the transmittance ratio of visible light is 1.

[0012] Further, the first partition and the second partition have different haze in the energized state, and the transmittance ratio of visible light is greater than 1 and less than or equal to 20.

[0013] The utility model also provides a kind of partition light adjusting device, including partition light adjusting film, electrode part and power controller, electrode part is used to form the electric connection of the independent partition of first conductive layer with power controller respectively, power controller is used to provide adjustable voltage to independent partition, so that the transmittance ratio of visible light of first partition and second partition is between 1-20, and the contrast of first partition and second partition is greater than 1.3.

[0014] Further, the second conductive layer is not partitioned, and is provided with a common electrode part, which is electrically connected to the power controller.

[0015] Further, the second conductive layer has the same independent partitions as the first conductive layer, and each independent partition is electrically connected to the power controller through the electrode part.

[0016] The application also provides a kind of automobile light adjusting glass, including partition light adjusting device, the adjustment range of first partition and second partition to visible light transmittance is between 0.01%-50%, and the adjustment range of haze is between 0.1-99%.

[0017] The application also provides a kind of automobile light adjusting glass, including partition light adjusting device, the adjustment range of first partition and second partition to visible light transmittance is between 0.01%-80%, and the adjustment range of haze is between 0.1-99%.

[0018] The application has the beneficial technical effect that different partitions of light adjusting film and light adjusting glass can have different haze and different transmittance of visible light, thereby realizing the following functions: meeting the needs of different users and scenes for color contrast and privacy of different light, meeting individual preferences through partition control, realizing patterning and functionalization, and selectively adjusting light to reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structure schematic view of the partition light adjusting film in embodiment 1 of the application.

[0020] Figure 2 is the top view of the partition light adjusting device in embodiment 1 of the application.

[0021] Figure 3 The partitioned schematic diagram of the first conductive layer in the embodiment 4 of the application.

[0022] Figure 4 The partitioned schematic diagram of the first conductive layer in the embodiment 5 of the application.

[0023] Figure 5 The partitioned schematic diagram of the second conductive layer in the embodiment 5 of the application.

[0024] Figure 6 The structure schematic diagram of the partitioned dimming glass in the application application examples 1-3.

[0025] 100 - partitioned dimming film;

[0026] 200 - partitioned dimming device;

[0027] 10 - first conductive layer

[0028] 101 - first partition;

[0029] 102 - second partition;

[0030] 103 - first conductive layer partition etching line;

[0031] 30 - polymer dispersed dye liquid crystal layer;

[0032] 11 - first transparent substrate layer;

[0033] 21 - second transparent substrate layer;

[0034] 20 - second conductive layer;

[0035] 203 - second conductive layer partition etching line;

[0036] 40 - power supply controller;

[0037] 51 - first electrode part;

[0038] 52 - second electrode part;

[0039] 53 - common electrode part;

[0040] 700 - dimming glass;

[0041] 71 - first glass;

[0042] 61 - first adhesive layer;

[0043] 72 - second glass;

[0044] 62 - second adhesive layer; DETAILED DESCRIPTION

[0045] The present application will be further described in detail below with reference to the accompanying drawings.

[0046] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments.

[0047] The term "contrast ratio" as used in this application refers to the maximum value of the ratio of the visible light transmittance of the dimming film measured in the on state to the visible light transmittance measured in the off state.

[0048] The term "on state" as used in this application refers to the state in which the dimming film is energized; "off state" refers to the state in which the dimming film is de-energized.

[0049] The term "visible light" as used in this application refers to light with wavelengths ranging from 380 nm to 760 nm.

[0050] The driver voltage mentioned in this application refers to the power supply voltage provided by the power controller.

[0051] The operating voltage mentioned in this application refers to the actual voltage applied to the positive and negative electrodes of the dimming film.

[0052] The ratio of the transmittance of the first zone and the second zone to visible light mentioned in this application refers to the ratio of the larger of the transmittance of the first zone to visible light and the smaller of the transmittance of the second zone to visible light.

[0053] The transmittance of visible light shall be tested in accordance with the method specified in GB / T5137.2-2002 "Test Methods for Optical Performance of Automotive Safety Glass".

[0054] Haze measurement: Performed according to the method specified in GB / T 2410-2008 "Determination of transmittance and haze of transparent plastics".

[0055] The specific structure and working principle of the dimming film are explained below with reference to the attached diagram.

[0056] like Figure 1 The diagram shown is a structural diagram of the partitioned dimming film 100. The partitioned dimming film is composed of a first transparent substrate layer 11, a first conductive layer 10, a polymer disperse dye liquid crystal layer 30, a second conductive layer 20, and a second transparent substrate layer 21 stacked in sequence. The first conductive layer 10 is divided into a first partition 101 and a second partition 102 that are independent of each other by partitioned etching lines 103.

[0057] like Figure 2The diagram shows a top view of a zone dimming device. The zone dimming device also includes an electrode section and a power controller. Different zones of the first conductive layer 10 are electrically connected to the power controller through different independent electrode sections. The first electrode section 51 is electrically connected to the first zone 101, and the second electrode section 52 is electrically connected to the second zone 102. The first electrode section 51 and the second electrode section 52 are electrically connected to one end electrode of the power controller 40. The other end electrode of the power controller 40 is electrically connected to the second conductive layer 20 through a common electrode section 53. The power controller provides an adjustable voltage to each zone.

[0058] The first conductive layer 10 and the second conductive layer 20 are both transparent material layers with conductivity. The materials constituting the conductive layers can be, for example, indium tin oxide (ITO), fluorine-doped tin oxide (FTO), tin oxide, zinc oxide, carbon nanotubes (CNTs), polymers containing poly(3,4-ethylenedioxythiophene) (PEDOT), etc. Furthermore, the transparent conductive layer can also be a multilayer film including an Ag alloy thin film.

[0059] A transparent conductive layer is formed on the surface of a transparent substrate layer and is tightly bonded to the polymer disperse dye liquid crystal layer. The transparent substrate layer can be a glass substrate, a silicon substrate, or a polymer film, etc. The materials forming the polymer film can be, for example, polyethylene, polystyrene, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polyvinyl chloride, polyimide, polysulfone, cyclic olefin polymers, triacetyl cellulose, etc.

[0060] The polymer dispersed dye liquid crystal dimming layer 30 comprises a liquid crystal composition containing liquid crystal molecules. The polymer dispersed dye liquid crystal dimming layer 30 has a three-dimensional mesh-like polymer network, within which liquid crystal molecules and guest-host dichroic dyes are present. Among the liquid crystal molecules contained in the polymer dispersed dye liquid crystal dimming layer, the dielectric anisotropy is positive, and the dielectric constant along the long axis of the liquid crystal molecules is greater than that along the short axis.

[0061] The first electrode portion 51, the second electrode portion 52, and the common electrode portion are respectively composed of a conductive adhesive layer, a wiring substrate, and conductive wires. The conductive adhesive layer may be a metal strip, a conductive film, or a conductive paste. The wiring substrate may be an FPC (Flexible Printed Circuits).

[0062] The power controller 40 can provide AC voltage to the dimming diaphragm. There can be one power controller 40 or a group of power controllers 40. When the voltage provided by the power controller 40 is AC voltage, the waveform can be a square wave, a sine wave, or other waveforms.

[0063] like Figure 3The polymer dispersed dye liquid crystal partition light control glass is shown, and the partition light control glass 700 comprises a first glass 71, a first adhesive layer 61, a polymer dispersed dye liquid crystal partition light control device 200, a second adhesive layer 62 and a second glass 72 which are sequentially and closely attached.

[0064] The polymer dispersed dye liquid crystal light control glass can be used as automobile glass, such as vehicle window glass or sky screen glass.

[0065] The polymer dispersed dye liquid crystal light control glass can be used as building glass, such as glass window or glass curtain wall.

[0066] The polymer dispersed dye liquid crystal layer comprises the following components by weight percentage: 40-65% of a liquid crystal composition; 3-15% of an anthraquinone dichroic dye; 10-40% of a reactive diluent; 8-30% of a prepolymer; 1-5% of a photoinitiator; 0-5% of a light stabilizer; 0.1-1% of a spacer particle; and 0-3% of a chiral agent.

[0067] The liquid crystal composition can be a cholesteric phase liquid crystal, a nematic phase liquid crystal, a smectic phase liquid crystal or a mixture thereof, and can be, for example, an alkyl biphenyl cyan liquid crystal series, or an alkyl triphenyl cyan liquid crystal series, or a single crystal or mixed crystal of an ethyne bridge type liquid crystal, a bicyclohexane type liquid crystal, a phenylcyclohexane type liquid crystal, or R-1011, and various cholesteric esters and chlorides.

[0068] The polymer dispersed dye liquid crystal light control layer comprises a dichroic dye, which is a dye that exhibits different colors along the long axis and short axis directions of the dye molecule due to different light absorption. Based on the above-mentioned properties of the dichroic dye, in order to improve the light control performance of the light control film and give the PDLC light control film product diversified colors, the dichroic dye is added to the light control layer material.

[0069] The reactive diluent can be selected from one or more of an acrylate monomer.

[0070] The prepolymer of the polymer is an organic compound containing a thermal crosslinking group or a photoreactive crosslinking group. The prepolymer can be selected from one or more of a polyurethane acrylate, an aliphatic polyurethane acrylate, a modified polyurethane acrylate oligomer, an aliphatic polyurethane diacrylate, an epoxy acrylate, an acrylic prepolymer, a polyester acrylate, a polyether acrylate, a polybutadiene acrylate and a polyamide.

[0071] The photoinitiator and the light stabilizer can be selected from one or more of commercially available products.

[0072] The spacer particle is a particulate matter with a particle size of 5-30 microns, and the material can be glass or polymer.

[0073] The addition of chiral agents can cause the liquid crystal molecules to produce a periodic helical structure. As an example, the chiral agent can be selected from one or more of R811, CB15, S811, R5011, R2011 produced by Beijing Eight Billion Space-Time Liquid Crystal Technology Co., Ltd.

[0074] The raw materials used in the embodiments and comparative examples of the present application are all commercially available, except for special instructions.

[0075] The raw materials such as liquid crystal, dye, prepolymer, reactive diluent, spacer, photoinitiator, chiral agent, etc. are proportioned to prepare a mixed material, and stirred to fully mix and homogenize.

[0076] The liquid crystal mixed material is sucked by a rubber tube and coated between the two transparent conductive substrate layers to prepare an intermediate.

[0077] The light-adjustable film is prepared by using ultraviolet polymerization to initiate phase separation: first, adjust the constant temperature water bath to the required temperature, place the intermediate coated with the dye liquid crystal light-adjustable layer under the ultraviolet lamp, control the light intensity by adjusting the distance between the lifting platform and the ultraviolet lamp, and set the exposure time to 3 minutes, thereby obtaining the light-adjustable film.

[0078] A plurality of etching lines are formed on the first conductive layer by a laser, and the etching lines cut the first conductive layer into a plurality of partitions; the wavelength of the laser is 100 nm to 400 nm.

[0079] Each partition is connected to a power supply controller through the ACF hot pressing electrode part, the power supply controller can independently apply a working voltage to each partition, and the partition sample is completed and can be used for electro-optical performance testing.

[0080] Example 1

[0081] As shown in Figure 1 The first transparent substrate layer and the second transparent substrate layer are selected to be transparent PET, and the first conductive layer and the second conductive layer are transparent ITO conductive layers respectively formed on one side surface of the first transparent substrate layer and the second transparent substrate layer.

[0082] The first conductive layer is etched by ultraviolet laser with a wavelength of 300 nm, the width of the etching line is about 40 microns, and the first conductive layer is divided into two independent regions, a first partition and a second partition.

[0083] The spacer is selected to be glass beads (Nanometer Micro Technology) with a D90 of 20 microns.

[0084] The reactive diluent is composed of hydroxyethyl methacrylate, isobornyl methacrylate, 1,4-butanediol diacrylate, and isooctyl acrylate in a weight ratio of 1:5:1:6.

[0085] The prepolymer is selected to be polyurethane acrylate.

[0086] The photoinitiator is 1173 supplied by Kaimin Chemicals.

[0087] The light stabilizer is 1130 supplied by BASF;

[0088] The chiral agent is R811 supplied by Baisibian Liquids Crystal;

[0089] The dye is selected from anthraquinone dichroic dyes.

[0090] In other embodiments, the reactive diluent, the prepolymer, the photoinitiator, the light stabilizer can also be selected from other substances mentioned in the specification and their compound according to the needs.

[0091] As shown in the figure, the partition dimming film is electrically connected with the electrode part, and the following connection mode is taken as an example. Figure 2

[0092] 1. The first partition and the second partition are electrically connected with the power supply controller through the first electrode part 51 and the second electrode part 52. The first electrode part 51 and the second electrode part 52 are selected from FPC, and the first electrode part 51 and the second electrode part 52 are respectively electrically connected with the first partition 101 and the second partition 102 through ACF conductive glue.

[0093] 2. The second conductive layer is electrically connected with the power supply controller through the common electrode part. The common electrode part 53 is selected from FPC, and the common electrode part is electrically connected with the second conductive layer 20 through ACF conductive glue.

[0094] In this embodiment, the dichroic anthraquinone dye is added in an amount of 0.1%, and the on-off state contrast of the partition dimming film under 60 volt voltage is 1.3.

[0095] Example 2

[0096] Example 2 is different from example 1 in that the dichroic anthraquinone dye is added in an amount of 5%, and the on-off state contrast of the partition dimming film under 60 volt voltage is 8.

[0097] Example 3

[0098] Example 3 is different from example 2 in that the dichroic anthraquinone dye is added in an amount of 15%, and the on-off state contrast of the partition dimming film under 60 volt voltage is 20.

[0099] Example 4

[0100] Example 4 is different from example 2 in that the first conductive layer is divided into 6 independent partitions, the second conductive layer is a non-partitioned common electrode, the first conductive layer has 6 independent electrode parts respectively, the second conductive layer has one electrode part, the electrode part is electrically connected with the power supply controller, and the partition etching line of the first conductive layer is as shown in​Figure 3 as shown.

[0101] Example 5

[0102] Example 5 differs from Example 2 in that the second conductive layer has the same partition etching lines as the first conductive layer, the first conductive layer has 6 partitioned electrode parts, each of which has an independent electrode part, and the second conductive layer also has 6 partitioned electrode parts, each of which has an independent electrode part, the electrode parts form an electrical connection with the power supply controller, the etching lines of the first conductive layer are as shown in Figure 4 , and the etching lines of the second conductive layer are as shown in Figure 5 .

[0103] Example 6

[0104] Example 6 differs from Example 2 in that the first transparent substrate layer uses a gray PET with a light transmittance of 60%.

[0105] Example 7

[0106] Example 7 differs from Example 2 in that a silver layer with a thickness of 10 nanometers is sandwiched between the first transparent substrate layer and the first conductive layer.

[0107] Application Example 1

[0108] According to Figure 6 , the dimming film obtained in Example 1 is vacuum heat bonded with a transparent adhesive film and flat plate glass to prepare a building dimming glass. The bonding method is known to those skilled in the art. The dimming glass can be connected to a power supply controller for dimming control.

[0109] Application Example 2

[0110] According to Figure 3 , the dimming film obtained in Example 2 is vacuum heat bonded with a transparent adhesive film and double-curved glass to prepare a car canopy dimming glass. The bonding method is known to those skilled in the art. The dimming glass can be connected to a power supply controller for dimming control.

[0111] Application Example 3

[0112] According to Figure 3 , the dimming film obtained in Example is vacuum heat bonded with a transparent adhesive film and curved glass to prepare a car side window dimming glass. The bonding method is known to those skilled in the art. The dimming glass can be connected to a power supply controller for dimming control.

[0113] Performance Test

[0114] The light control glass prepared in application examples 1-3 was respectively taken as the test object, the haze (H) and the visible light transmittance (T) of the first and second sub-zones under different conditions were respectively tested according to the method specified in GB / T 2410-2008, and the ratio (R) of the visible light transmittance of different sub-zones was calculated; the test results were recorded in Table 1 below.

[0115] Table 1 Performance test results of sub-zone light control film in application examples

[0116]

[0117] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application, and those skilled in the art can make modifications to the embodiments without creative contribution according to the needs after reading the specification, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A zoned dimming film, comprising a first conductive layer and a second conductive layer disposed opposite to each other, a polymer-dispersed liquid crystal layer sandwiched between the first conductive layer and the second conductive layer, wherein the first conductive layer is composed of a plurality of independent zones, including at least a first zone and a second zone, characterized in that, The ratio of the transmittance of the first partition to the second partition for visible light is between 1 and 20; the contrast ratio of the first partition to the second partition is greater than 1.

3.

2. The local dimming film according to claim 1, characterized in that, The contrast between the first partition and the second partition is greater than 2.

3. The local dimming film according to claim 1, characterized in that, The first or second partition has a haze of more than 90% when it is not powered on.

4. The local dimming film according to claim 1 or 3, characterized in that, The first or second partition has a haze of less than 5% when powered on.

5. The local dimming film according to claim 1 or 3, characterized in that, The first or second partition has a haze of more than 5% when powered on.

6. The local dimming film according to claim 1 or 3, characterized in that, The first partition and the second partition have the same haze when powered on, and the ratio of their transmittance to visible light is 1.

7. The local dimming film according to claim 1 or 3, characterized in that, The first partition and the second partition have different haze when powered on, and the ratio of their transmittance to visible light is greater than 1 and less than or equal to 20.

8. A zone dimming device, characterized in that, The device includes the partitioned dimming film, electrode portion, and power controller as described in claim 1. The electrode portion is used to electrically connect the independent partitions of the first conductive layer to the power controller, and the power controller is used to provide an adjustable voltage to the independent partitions, such that the ratio of the transmittance of the first partition to the second partition to visible light is between 1 and 20, and the contrast ratio of the first partition to the second partition is greater than 1.

3.

9. The zone dimming device according to claim 8, characterized in that, The second conductive layer is not partitioned and has a common electrode portion, which is electrically connected to the power controller.

10. The zone dimming device according to claim 8, characterized in that, The second conductive layer has the same independent partitions as the first conductive layer, and each of the independent partitions is electrically connected to the power controller through the electrode portion.

11. A type of automotive dimming glass, characterized in that, The device includes the zone dimming device according to claim 10, wherein the first zone and the second zone have a visible light transmittance adjustment range of 0.01%-50% and a haze adjustment range of 0.1%-99%.

12. A type of architectural dimming glass, characterized in that, The device includes the zone dimming device according to claim 10, wherein the first zone and the second zone have a visible light transmittance adjustment range of 0.01%-80% and a haze adjustment range of 0.1%-99%.

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