Partitioned dimming device, manufacturing method of partitioned dimming device and dimming glass

Abstract

The invention provides a partitioned dimming device, a manufacturing method of the partitioned dimming device and dimming glass, the partitioned dimming device comprises a first transparent base material layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent base material layer which are stacked in sequence, the first conductive layer or the second conductive layer comprises a plurality of conductive partitions, each conductive subarea comprises a subarea electrode and a conductive material layer, and the subarea electrode is electrically connected with the conductive material layer; conductive subareas with different voltage drops exist in the plurality of conductive subareas, and the voltage drop of each conductive subarea is jointly determined by the subarea electrode and the conductive material layer included in the conductive subarea. According to the partitioned dimming device, the manufacturing method of the partitioned dimming device and the dimming glass provided by the embodiment of the invention, conductive partitions with different voltage drops are realized through the partitioned electrodes and the conductive material layer, the process is simple, and the cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and in particular to a zone dimming device, a method for manufacturing the zone dimming device, and dimming glass. Background Art

[0002] At present, zoned dimming glass has become a trend, and more and more cars or buildings will choose to use zoned dimming glass.

[0003] The current zoned dimming glass presents a uniform foggy state when all the power is off, and a uniform transparent state when all the power is on, or a certain area is controlled to be transparent or opaque through circuit design. In the prior art, the zoned dimming of EC is achieved by adjusting the type of materials such as the transparent conductive layer, electrolyte layer, electrochromic layer, etc. inside the diaphragm. Or the gradient dimming of polymer dispersed liquid crystal (PDLC) is achieved by adjusting the thickness of the conductive layer and the liquid crystal layer. Both of the above methods require the indium tin oxide (ITO) magnetron sputtering coating and liquid crystal box forming process in the early stage of diaphragm production. The process is difficult, resulting in low production efficiency and high cost. Summary of the invention

[0004] In view of the problems in the prior art, the embodiments of the present invention provide a zone dimming device, a method for manufacturing the zone dimming device, and dimming glass, which can at least partially solve the problems in the prior art.

[0005] In a first aspect, the present invention provides a zone dimming device, comprising a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer, and a second transparent substrate layer stacked in sequence, wherein:

[0006] The first conductive layer or the second conductive layer includes multiple conductive partitions, each conductive partition includes a partition electrode and a conductive material layer, and the partition electrode is electrically connected to the conductive material layer; there are conductive partitions with different voltage drops among the multiple conductive partitions, and the voltage drop of each conductive partition is jointly determined by the partition electrode and the conductive material layer included in the conductive partition.

[0007] Furthermore, the partition electrode includes a vertical conductive layer and a circuit layer stacked in sequence, and the vertical conductive layer is electrically connected to the conductive material layer of the conductive partition where the partition electrode is located; the conductivity of the partition electrode is jointly determined by the circuit layer and the vertical conductive layer.

[0008] Furthermore, the partition electrode includes an adjustment layer, a vertical conductive layer and a circuit layer stacked in sequence, and the adjustment layer is electrically connected to the conductive material layer of the conductive partition where the partition electrode is located; the conductivity of the partition electrode is jointly determined by the circuit layer, the vertical conductive layer and the adjustment layer.

[0009] Furthermore, a gold finger area that has undergone surface treatment is provided on the circuit layer to increase or decrease the voltage drop of the partition electrode.

[0010] Furthermore, the first conductive layer and the second conductive layer respectively include multiple conductive partitions, and there are conductive partitions with different voltage drops among the multiple conductive partitions included in the first conductive layer; there are conductive partitions with different voltage drops among the multiple conductive partitions included in the second conductive layer, and the conductive partitions included in the first conductive layer and the second conductive layer correspond one to one.

[0011] Furthermore, the plurality of conductive partitions are arranged in sequence according to the magnitude of the voltage drop, or the plurality of conductive partitions are arranged at intervals according to the magnitude of the voltage drop.

[0012] Furthermore, the plurality of conductive partitions are used to display a preset pattern.

[0013] In a second aspect, the present invention provides a dimming glass, comprising the zoned dimming device described in any one of the above embodiments.

[0014] In a third aspect, the present invention provides a method for manufacturing a zone dimming device, comprising:

[0015] Liquid crystal activation is performed on multiple target areas of the dimming film; wherein the dimming film comprises a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer; the first conductive layer and / or the second conductive layer comprises a plurality of conductive partitions; each conductive partition corresponds to a target area;

[0016] Cutting a plurality of target areas of the dimming film to obtain grooves corresponding to the partition electrodes of each conductive partition;

[0017] Partition electrodes are made in the grooves corresponding to the partition electrodes of each conductive partition, so that conductive partitions with different voltage drops exist among the multiple conductive partitions; wherein the voltage drop of each conductive partition is jointly determined by the partition electrodes included in the conductive partition and the conductive material layer included in the conductive partition.

[0018] Further, the step of making a partition electrode in the groove of each conductive partition comprises:

[0019] placing a vertical conductive layer and a circuit layer in sequence in the groove;

[0020] The vertical conductive layer and the circuit layer are bonded to form the partition electrode.

[0021] Furthermore, the step of manufacturing a partition electrode in a groove corresponding to the partition electrode of each conductive partition includes:

[0022] forming a regulating layer in the groove;

[0023] placing a vertical conductive layer and a circuit layer in sequence on the adjustment layer;

[0024] The adjustment layer, the vertical conductive layer and the circuit layer are bonded to form the partition electrode.

[0025] Furthermore, the circuit layer includes a gold finger area; accordingly, the method further includes:

[0026] The gold finger region is subjected to surface treatment to obtain a gold finger region with a target resistance value.

[0027] Furthermore, the step of cutting the plurality of target areas of the dimming film to obtain grooves corresponding to the partition electrodes of each conductive partition includes:

[0028] The conductive material layer included in the conductive partition corresponding to at least one of the target areas is cut to increase the sheet resistance of the corresponding conductive material layer.

[0029] The partition dimming device, the manufacturing method of the partition dimming device and the dimming glass provided by the embodiments of the present invention include a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer stacked in sequence, the first conductive layer or the second conductive layer includes a plurality of conductive partitions, each conductive partition includes a partition electrode and a conductive material layer, the partition electrode is connected to the conductive material layer; there are conductive partitions with different voltage drops among the plurality of conductive partitions, the voltage drop of each conductive partition is jointly determined by the partition electrode and the conductive material layer included in the conductive partition, and conductive partitions with different voltage drops are realized by the partition electrode and the conductive material layer, the process is simple and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0031] Figure 1 It is a schematic cross-sectional structure diagram of the dimming film provided in the first embodiment of the present invention.

[0032] Figure 2 It is a schematic cross-sectional structure diagram of a dimming film provided in a second embodiment of the present invention.

[0033] Figure 3 It is a schematic diagram of the three-dimensional structure of a zone dimming device provided in the third embodiment of the present invention.

[0034] Figure 4 It is a schematic diagram of the three-dimensional structure of a zone dimming device provided in the fourth embodiment of the present invention.

[0035] Figure 5 It is a schematic cross-sectional structure diagram of a zone dimming device provided in the fifth embodiment of the present invention.

[0036] Figure 6 It is a schematic cross-sectional structure diagram of a zone dimming device provided in a sixth embodiment of the present invention.

[0037] Figure 7 It is a schematic cross-sectional structure diagram of a zone dimming device provided in the seventh embodiment of the present invention.

[0038] Figure 8 It is a schematic diagram of the three-dimensional structure of a zone dimming device provided in the eighth embodiment of the present invention.

[0039] Fig. 9 It is a schematic diagram of the planar structure of the first conductive layer provided by the ninth embodiment of the present invention.

[0040] Fig.10 It is a flowchart of a method for manufacturing a local dimming device provided in the tenth embodiment of the present invention.

[0041] Fig.11 It is a flow chart of a method for manufacturing a zone dimming device provided in the eleventh embodiment of the present invention.

[0042] Fig.12 It is a flowchart of a method for manufacturing a zone dimming device provided in the twelfth embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other arbitrarily. The acquisition, storage, use, and processing of data in the technical scheme in this application comply with the relevant provisions of laws and regulations. The user information in the embodiments of the present application is obtained through legal and compliant channels, and the acquisition, storage, use, and processing of user information are authorized and agreed by the customer.

[0044] In order to facilitate understanding of the technical solution provided by this application, the relevant contents of the technical solution of this application are first explained below.

[0045] like Figure 1 and Figure 2 As shown, the dimming film may include a first polyethylene terephthalate (PET) layer, a first ITO layer, a liquid crystal layer, a second ITO layer, and a second PET layer stacked in sequence. When the first ITO layer and the second ITO layer are not powered, the liquid crystal molecules in the liquid crystal layer are in an irregular dispersion state, and light cannot penetrate into the liquid crystal layer, so the dimming film is opaque. When the first ITO layer and the second ITO layer are powered, an electric field is formed between the first ITO layer and the second ITO layer, and the liquid crystal molecules in the liquid crystal layer are deflected by the electric field. Since the liquid crystal molecules are high dielectric anisotropy materials, the refractive index of the light changes after deflection, and the dimming film can present different transparent states, such as semi-transparent or fully transparent. Figure 1 As shown, a plurality of conductive partitions are arranged in the first ITO layer, and each conductive partition can lead out an electrode as a partition electrode of the conductive partition. Figure 2 As shown, multiple conductive partitions are set on the first ITO layer, and multiple conductive partitions are set on the second ITO layer, and the conductive partitions of the first ITO layer correspond to the conductive partitions of the second ITO layer one by one. In actual use, multiple partition electrodes can be converged together and controlled by a unified port, so that the dimming film can present a uniform fog state when the power is off and a uniform transparent state when the power is on, or a certain conductive area can be fogged or a certain conductive partition can be transparent through circuit control.

[0046] Usually, the transmittance of the entire surface of the dimming film is uniform when all power is turned on. In the prior art, in order to realize dimming devices with more complex dimming methods such as gradient dimming, it is necessary to change the thickness or material type of the dimming film, which leads to problems of great process difficulty and high cost.

[0047] The relationship curve between the transmittance and voltage of PDLC usually presents an "S" shape. In the low voltage stage (initial stage), the transmittance is at a low level; as the voltage gradually increases, the transmittance begins to increase slowly, and then enters a rapid rise stage; when the voltage rises to a certain level, the increase in transmittance will slow down again, and finally approach a higher stable value, which is close to the maximum transmittance that the PDLC material can achieve. Therefore, changing the voltage can change the transmittance of PDLC. Dye PDLC, LC, SPD, and trans PDLC have similar properties.

[0048] The present application designs the structure of the partition electrode, changes the resistance of each component of the partition electrode, and changes the voltage drop of the conductive partition, so that the area corresponding to each conductive partition can present a variety of different transparent states. Compared with changing the thickness or material type of the dimming film, the process is simple and the cost is low.

[0049] Figure 3 is a schematic diagram of the three-dimensional structure of a zone dimming device provided in the third embodiment of the present invention, Figure 4 is a schematic diagram of the three-dimensional structure of a zone dimming device provided in a fourth embodiment of the present invention. Figure 3 and Figure 4 As shown, the zone dimming device provided by the embodiment of the present invention includes a first transparent substrate layer 1, a first conductive layer 2, a liquid crystal layer 3, a second conductive layer 4 and a second transparent substrate layer 5 stacked in sequence, wherein:

[0050] The first conductive layer 2 or the second conductive layer 4 includes multiple conductive partitions 6, each conductive partition 6 includes a partition electrode 61 and a conductive material layer 62, and the partition electrode 61 is electrically connected to the conductive material layer 62; there are conductive partitions 6 with different voltage drops among the multiple conductive partitions 6, and the voltage drop of each conductive partition 6 is jointly determined by the partition electrode 61 and the conductive material layer 62 included in the conductive partition 6.

[0051] Specifically, the first conductive layer 2 or the second conductive layer 4 includes a plurality of conductive partitions 6. If the first conductive layer 2 includes a plurality of conductive partitions 6, the second conductive layer 4 may not be partitioned, and the second conductive layer 4 includes a common electrode 7. If the second conductive layer 4 includes a plurality of conductive partitions 6, the first conductive layer 2 may not be partitioned, and the first conductive layer 2 includes a common electrode 7. The specific number of the conductive partitions 6 is set according to actual needs, and is not limited in the embodiment of the present invention.

[0052] Since the electric field strength between the first conductive layer 2 and the second conductive layer 4 controls the liquid crystal deflection angle of the liquid crystal layer 3, and the liquid crystal deflection angle affects the light transmittance, the voltage drop of the conductive partition 6 can be adjusted by adjusting the conductivity of the partition electrode 61 of the conductive partition 6. The voltage drop of the conductive partition 6 is also affected by the conductivity of the conductive material layer 62, and the voltage drop of the conductive partition 6 can be changed by changing the conductivity of the conductive material layer 62. Therefore, the voltage drop of the conductive partition 6 can be determined by the partition electrode 61 and the conductive material layer 62 included in the conductive partition 6. By setting a plurality of conductive partitions 6 with different voltage drops, a variety of dimming effects such as gradient, blinds, and patterns can be achieved. The voltage drop of each conductive partition 6 is set according to actual needs, and the embodiment of the present invention is not limited. The conductive material layer 62 of each conductive partition 6 can be made of the same conductive material and have the same thickness.

[0053] Among them, the first conductive layer 2 and the second conductive layer 4 can be made of ITO, the first transparent substrate layer 1 and the second transparent substrate layer 5 can be made of PET, and the liquid crystal layer 3 can be made of PDLC, etc., which can be selected according to actual needs and are not limited in the embodiment of the present invention.

[0054] For example, Figure 3 As shown, the first conductive layer 2 includes three conductive partitions 6, and the conductivity of the partition electrodes of the three conductive partitions 6 is different, so as to achieve different voltage drops in the three conductive partitions 6, so that the three conductive partitions 6 can present different dimming effects. If the three conductive partitions 6 are arranged in order according to the voltage drop, a gradual dimming effect can be achieved.

[0055] For example, Figure 4 As shown, the second conductive layer 4 includes three conductive partitions 6, and the conductivity of the partition electrodes of the three conductive partitions 6 is different, so as to achieve different voltage drops in the three conductive partitions 6, so that the three conductive partitions 6 can present different dimming effects. If the three conductive partitions 6 are arranged in order according to the voltage drop, a gradual dimming effect can also be achieved.

[0056] The partition dimming device provided by the embodiment of the present invention includes a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer stacked in sequence, the first conductive layer or the second conductive layer includes a plurality of conductive partitions, each conductive partition includes a partition electrode and a conductive material layer, and the partition electrode is connected to the conductive material layer; there are conductive partitions with different voltage drops among the plurality of conductive partitions, and the voltage drop of each conductive partition is jointly determined by the partition electrode and the conductive material layer included in the conductive partition, and conductive partitions with different voltage drops are realized by the partition electrode and the conductive material layer, and the process is simple and the cost is low.

[0057] Figure 5 is a schematic cross-sectional structure diagram of a zone dimming device provided in a fifth embodiment of the present invention, such as Figure 5 As shown, based on the above embodiments, further, a groove is provided on one side surface of the conductive material layer 62 of the conductive partition 6, and the partition electrode 61 is provided on the bottom surface of the groove provided on one side surface of the conductive material layer 62.

[0058] Specifically, a groove is provided on one side surface of the conductive material layer 62 of the conductive partition 6, and the partition electrode 61 of the conductive partition 6 is provided on the bottom surface of the groove provided on one side surface of the conductive material layer 62. The depth of the groove provided on one side surface of the conductive material layer 62 will affect the conductivity of the conductive material layer 62. By providing the grooves of different depths on one side surface of the conductive material layer 62, the conductive material layer 62 with different conductivity can be obtained. The deeper the depth of the groove provided on one side surface of the conductive material layer 62, the greater the square resistance of the conductive material layer 62, and the smaller the conductivity of the conductive material layer 62.

[0059] The square resistance of the conductive material layer 62 with the above-mentioned groove can be calculated by the formula R1=ρ1 / d, where R1 represents the square resistance of the conductive material layer 62 with the above-mentioned groove, ρ1 represents the resistivity of the conductive material used in the conductive material layer 62, and d represents the thickness of the conductive material layer 62 with the above-mentioned groove.

[0060] Figure 6 is a schematic cross-sectional structure diagram of a zone dimming device provided in a sixth embodiment of the present invention, such as Figure 6 As shown, on the basis of the above embodiments, further, the partition electrode 61 includes a vertical conductive layer 612 and a circuit layer 611 stacked in sequence, and the vertical conductive layer 612 is electrically connected to the conductive material layer 62 of the conductive partition where the partition electrode 61 is located; the conductivity of the partition electrode 61 is jointly determined by the circuit layer 611 and the vertical conductive layer 612.

[0061] Specifically, the circuit layer 611 can adopt a flexible printed circuit (Flexible Print Circuit, referred to as FPC), and the resistance of the circuit layer 611 can be changed by changing the metal type, length, and cross-sectional area of ​​the circuit layer 611. The circuit layer 611 is used to realize the electrical connection between the partition electrode 61 and the external circuit. The resistance R2 of the circuit layer 611 can be calculated by the formula R2=ρ2L / S, where ρ2 represents the resistivity of the conductor material of the resistance layer, L represents the line length of the resistance layer, and S represents the cross-sectional area of ​​the circuit layer. The increase in the resistance of the circuit layer 611 will lead to a decrease in the conductivity of the partition electrode 61.

[0062] The vertical conductive layer 612 can be made of anisotropic conductive film (ACF) or conductive glue. The vertical conductive layer 612 is used to achieve conductivity in the vertical direction. For ACF, an important factor affecting the conductivity is the explosion rate of the conductive particles. The lower the explosion rate, the greater the resistance value. For conductive glue, the conductive properties of the conductive filler will directly affect the resistance value of the conductive glue. For example, silver powder has excellent conductivity, and the resistance value of conductive glue made with silver powder as the main filler is usually low; while the conductivity of graphite is relatively weak, the resistance value of the conductive glue using graphite as the filler will be high.

[0063] Figure 7 is a schematic cross-sectional structure diagram of a zone dimming device provided in the seventh embodiment of the present invention, such as Figure 7As shown, on the basis of the above embodiments, further, the partition electrode 61 includes an adjustment layer 613, a vertical conductive layer 612 and a circuit layer 611 stacked in sequence, and the adjustment layer 613 is electrically connected to the conductive material layer 62 of the conductive partition 6 where the partition electrode 61 is located; the conductivity of the partition electrode 61 is jointly determined by the circuit layer 611, the vertical conductive layer 612 and the adjustment layer 613.

[0064] Specifically, the adjustment layer 613 can be made of conductive paste such as silver paste. The important factor affecting the conductivity of the silver paste is the silver powder content. The silver content is inversely proportional to the resistance. The higher the silver content, the lower the resistance value. The adjustment layer 613 is electrically connected to the conductive material layer 62 of the conductive partition 6 where the partition electrode 61 is located. The range of resistance change of the adjustment layer 613 is greater than the range of resistance change of the vertical conductive layer 612, and the range of resistance change of the vertical conductive layer 612 is greater than the range of resistance change of the circuit layer. By adding the adjustment layer 613, the conductivity of the partition electrode can be adjusted in a wider range, so that a suitable voltage drop for the conductive partition can be obtained.

[0065] On the basis of the above embodiments, further, the adjustment layer 613 uses conductive paste. Conductive paste is a material with conductive properties formed by dispersing conductive powder (such as metal powder, carbon powder, etc.) in a liquid organic or inorganic carrier (such as resin, organic solvent, etc.), which can achieve electrical conduction between electronic components and manufacture various conductive functional components.

[0066] On the basis of the above embodiments, further, a gold finger region after surface treatment is provided on the circuit layer 611 to increase or decrease the conductivity of the partition electrode 61. The gold finger region is a structure on the circuit layer 611 for realizing electrical connection.

[0067] For example, the resistance of the gold finger region may be increased by coating an organic or inorganic material having a higher resistivity on the gold finger region, so as to reduce the conductivity of the partition electrode 61 .

[0068] For example, by using a process such as electroplating to further plate a layer of metal on the surface of the original gold finger region, the resistance of the gold finger region can be reduced to increase the conductivity of the partition electrode 61 .

[0069] On the basis of the above embodiments, further, the vertical conductive layer 612 is made of anisotropic conductive film or conductive adhesive.

[0070] Figure 8 is a schematic diagram of the three-dimensional structure of a zone dimming device provided in the eighth embodiment of the present invention. Figure 8As shown, on the basis of the above embodiments, further, the first conductive layer 2 includes a plurality of conductive partitions 21, the second conductive layer 4 includes a plurality of conductive partitions 41, and there are conductive partitions with different voltage drops among the plurality of conductive partitions 21 included in the first conductive layer 2; there are conductive partitions with different voltage drops among the plurality of conductive partitions 41 included in the second conductive layer 4, and the conductive partitions included in the first conductive layer 2 and the second conductive layer 4 correspond one to one.

[0071] Specifically, conductive partitions may be provided on the first conductive layer 2 and the second conductive layer 4, respectively, and the conductive partitions 21 included in the first conductive layer 2 correspond one to one with the conductive partitions 41 included in the second conductive layer 4. The plurality of conductive partitions 21 included in the first conductive layer 2 have conductive partitions with different voltage drops, and the plurality of conductive partitions 41 included in the second conductive layer 4 have conductive partitions with different voltage drops. The specific structures of the conductive partitions 21 and the conductive partitions 41 may adopt the structure of the conductive partition 6 described in any of the above embodiments, which will not be described in detail here.

[0072] Conductive partitions are respectively set for the first conductive layer 2 and the second conductive layer 4, and correspond one to one. Compared with setting conductive partitions on a single conductive layer, the voltage difference between the upper and lower conductive layers can be reduced under the same voltage drop, so that the DC bias on the liquid crystal layer is reduced, thereby improving the service life of the liquid crystal layer.

[0073] For example, Figure 8 As shown, the first conductive layer 2 includes three conductive sub-areas 21, and the second conductive layer 4 includes three conductive sub-areas 41. The conductive sub-areas 21 correspond to the conductive sub-areas 41 one by one.

[0074] On the basis of the above embodiments, further, the first conductive layer 2 or the second conductive layer 4 includes a plurality of conductive partitions 6 arranged in sequence according to the magnitude of the voltage drop. Since the voltage drops of the conductive partitions 6 are different, when the conductive partitions are connected to the same voltage, the voltages of the electric fields corresponding to the conductive partitions 6 applied to the corresponding parts of the liquid crystal layer 3 will be different, so that the transmittances of the corresponding parts of the conductive partitions 6 on the liquid crystal layer 3 are different, presenting different transparent states. When the conductive partitions 6 are arranged in sequence according to the magnitude of the voltage drop, the partition dimming device can present a gradual dimming effect.

[0075] On the basis of the above embodiments, the first conductive layer 2 includes a plurality of conductive partitions 21 arranged in sequence according to the magnitude of the voltage drop; the second conductive layer 4 includes a plurality of conductive partitions 41 arranged in sequence according to the magnitude of the voltage drop. Since the conductive partitions 21 correspond to the conductive partitions 41 one by one and are arranged in sequence according to the magnitude of the voltage drop, a gradual dimming effect can also be presented.

[0076] On the basis of the above embodiments, further, the first conductive layer 2 or the second conductive layer 4 includes a plurality of conductive sub-areas 6 which are arranged at intervals according to the magnitude of the voltage drop.

[0077] Specifically, multiple conductive partitions 6 are arranged at intervals according to the size of the voltage drop, that is, the voltage drop of one conductive partition 6 is greater than the voltage drop of the adjacent conductive partition 6, or the voltage drop of one conductive partition 6 is less than the voltage drop of the adjacent conductive partition 6. When each conductive partition 6 is connected to the same voltage, the partition dimming device can present a dimming effect of alternating light and dark.

[0078] For example, the first conductive layer 2 includes 20 conductive partitions 6, wherein the voltage drop of 10 conductive partitions 6 is a first preset value, and the voltage drop of the remaining 10 conductive partitions 6 is a second preset value, and the absolute value of the difference between the first preset value and the second preset value is greater than a threshold value, and the selection of the threshold value can make the area corresponding to the conductive partition with the voltage drop of the first preset value and the area corresponding to the conductive partition with the voltage drop of the second preset value present a significantly different transparent state. Arranging the 20 conductive partitions 6 at intervals according to the size of the voltage drop can present a dimming effect of alternating light and dark, similar to the light transmission effect of blinds.

[0079] On the basis of the above embodiments, further, the first conductive layer 2 includes a plurality of conductive partitions 21 arranged at intervals according to the magnitude of the voltage drop, and the second conductive layer 4 includes a plurality of conductive partitions 41 arranged at intervals according to the magnitude of the voltage drop. Since the conductive partitions 21 correspond to the conductive partitions 41 one by one and are arranged at intervals according to the magnitude of the voltage drop, a dimming effect of alternating light and dark can also be presented.

[0080] On the basis of the above embodiments, further, the first conductive layer 2 or the second conductive layer 4 includes a plurality of conductive partitions 6 for realizing the display of a preset pattern.

[0081] Specifically, through the conductive partitions 6 with different voltage drops, the partition dimming device presents a preset pattern through different transparent states. The preset pattern can be obtained by arranging the conductive partitions 6 with different voltage drops, or by customizing the shape of the conductive partitions 6. The preset pattern is selected according to actual needs and is not limited in the embodiment of the present invention. For example, the preset pattern is a logo.

[0082] For example, Fig. 9 As shown, the first conductive layer 2 includes two conductive partitions 6-1 and 6-2 with different voltage drops, and the second conductive layer 4 is not partitioned. When the conductive partitions 6-1 and 6-2 are not connected to voltage, the conductive partitions 6-1 and 6-2 are not transparent; when the conductive partitions 6-1 and 6-2 are connected to the same voltage, the areas corresponding to the conductive partitions 6-1 and 6-2 will show different transparent states, so that the elliptical shape of the conductive partition 6-2 appears.

[0083] On the basis of the above embodiments, further, the multiple conductive partitions 21 included in the first conductive layer 2 and the multiple conductive partitions 41 included in the second conductive layer 4 are used to realize the display of a preset pattern.

[0084] Specifically, the preset pattern can be arranged by the conductive partitions 21 with different voltage drops, or the shape of the conductive partition 21 can be customized to obtain the preset pattern. Since the conductive partition 41 corresponds to the conductive partition 21 one by one, when the conductive partition 21 is arranged with the preset pattern, the conductive partition 41 will also be arranged with the same preset pattern; when the shape of the conductive partition 21 is customized to obtain the preset pattern, the same shape will also be customized for the conductive partition 41.

[0085] An embodiment of the present invention provides a dimming glass, comprising the zone dimming device described in any one of the above embodiments.

[0086] Specifically, the zone dimming device can be arranged between two glass sheets to form a dimming glass, or the zone dimming device can be arranged on one glass sheet to form a dimming glass. The specific structure of the dimming glass is arranged according to actual needs, and the embodiment of the present invention does not limit it.

[0087] The dimming glass provided by the embodiment of the present invention can reduce the manufacturing cost because it adopts the zone dimming device provided by the embodiment of the present invention.

[0088] Fig.10 FIG. 1 is a flow chart of a method for manufacturing a zone dimming device according to a tenth embodiment of the present invention. Fig.10 As shown, the manufacturing method of the zone dimming device provided by the embodiment of the present invention includes:

[0089] S1001, performing liquid crystal activation on multiple target areas of a dimming film; wherein the dimming film comprises a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer; the first conductive layer and / or the second conductive layer comprises a plurality of conductive partitions; each conductive partition corresponds to a target area;

[0090] Specifically, the dimming film includes a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer, and a second transparent substrate layer. No partition electrodes have been made on the first conductive layer and the second conductive layer. In order to make partition electrodes, an area for making partition electrodes, i.e., a target area, will be selected on the dimming film, and each partition electrode corresponds to a target area. Liquid crystal activation is performed on each target area of ​​the dimming film, and a laser can be used to scan the surface of one side of the conductive layer (the first conductive layer and / or the second conductive layer) where the partition electrodes need to be made, so that the liquid crystal layer and the conductive layer are peeled off.

[0091] S1002, cutting multiple target areas of the dimming film to obtain grooves corresponding to the partition electrodes of each conductive partition;

[0092] Specifically, each target area of ​​the dimming film is cut to obtain a groove corresponding to the partition electrode of each conductive partition, wherein the groove is used to accommodate the partition electrode and enable the partition electrode to contact the conductive material layer of the conductive partition. The target area can be cut by laser.

[0093] For example, after the first transparent substrate layer, the first conductive layer and the liquid crystal layer are cut away at the target area of ​​the dimming film, one side surface of the second conductive layer is exposed, and then a partition electrode is formed on the surface.

[0094] S1003. Making partition electrodes in the grooves corresponding to the partition electrodes of each conductive partition, so that conductive partitions with different voltage drops exist among the multiple conductive partitions; wherein the voltage drop of each conductive partition is jointly determined by the partition electrodes included in the conductive partition and the conductive material layer included in the conductive partition.

[0095] Specifically, a partition electrode is made in the groove corresponding to the partition electrode of each conductive partition, so that the partition electrode can be electrically connected to the conductive material layer of the conductive partition in which it is located. There are conductive partitions with different voltage drops in the multiple conductive partitions finally obtained. If the first conductive layer or the second conductive layer includes multiple conductive partitions, then the first conductive layer or the second conductive layer includes multiple conductive partitions with different voltage drops. If the first conductive layer and the second conductive layer respectively include multiple conductive partitions, then the multiple conductive partitions included in the first conductive layer have conductive partitions with different voltage drops, and the multiple conductive partitions included in the second conductive layer have conductive partitions with different voltage drops. The voltage drop of the conductive partition can be changed by changing the conductivity of the partition electrode of the conductive partition, and the voltage drop of the conductive partition can also be changed by changing the conductivity of the conductive material layer of the conductive partition. Among them, the voltage drop of each conductive partition is set according to actual needs, and the embodiment of the present invention is not limited.

[0096] The manufacturing method of the partitioned dimming device provided in the embodiment of the present invention performs liquid crystal activation on multiple target areas of the dimming film; the first conductive layer and / or the second conductive layer includes multiple conductive partitions; each conductive partition corresponds to a target area; the multiple target areas of the dimming film are cut to obtain grooves corresponding to the partition electrodes of each conductive partition; partition electrodes are made in the grooves corresponding to each conductive partition, so that there are conductive partitions with different voltage drops among the multiple conductive partitions. Different dimming effects can be achieved by making partition electrodes, without the need to adjust the material of the dimming film itself, thereby reducing the manufacturing difficulty and cost of the partitioned dimming device.

[0097] Fig.11 is a flow chart of a method for manufacturing a zone dimming device according to an eleventh embodiment of the present invention. Fig.11 Based on the above embodiments, further, manufacturing a partition electrode in a groove corresponding to each conductive partition includes:

[0098] S1101, placing a vertical conductive layer and a circuit layer in the groove in sequence;

[0099] Specifically, a vertical conductive layer is first placed in the groove, and then a circuit layer is placed on the vertical conductive layer. The vertical conductive layer placed first will contact the conductive material layer of the conductive partition to achieve electrical connection between the vertical conductive layer and the conductive material layer. The resistances of the vertical conductive layer and the circuit layer are both pre-designed.

[0100] S1102, joining the vertical conductive layer and the circuit layer to form the partition electrode.

[0101] Specifically, the vertical conductive layer and the circuit layer are joined together to form the partition electrode.

[0102] For example, the vertical conductive layer is made of an anisotropic conductive film, and the anisotropic conductive film and the circuit layer can be combined into one by lamination to form the partition electrode.

[0103] For example, the vertical conductive layer uses double-sided conductive adhesive, and since the double-sided conductive adhesive itself is sticky, the double-sided conductive adhesive can be bonded to the circuit layer as a whole to form the partitioned electrode. In addition, the double-sided conductive adhesive will also be bonded to the conductive material layer.

[0104] Fig.12 FIG. 1 is a flow chart of a method for manufacturing a zone dimming device according to a twelfth embodiment of the present invention. Fig.12 As shown, on the basis of the above embodiments, further, the step of manufacturing a partition electrode in a groove corresponding to the partition electrode of each conductive partition includes:

[0105] S1201, making an adjustment layer in the groove;

[0106] Specifically, an adjustment layer is formed in the groove, and the adjustment layer is used to increase the resistance of the partition electrode, thereby increasing the voltage drop of the conductive partition. The adjustment layer will contact the conductive material layer to achieve electrical connection.

[0107] For example, the adjustment layer is made of silver paste, and the silver paste can be attached to the bottom surface of the groove by screen printing to realize the production of the adjustment layer, wherein the silver powder content of the silver paste is pre-designed.

[0108] S1202, placing a vertical conductive layer and a circuit layer in sequence on the adjustment layer;

[0109] Specifically, after the adjustment layer is manufactured, a vertical conductive layer and a circuit layer are sequentially placed on the adjustment layer, the vertical conductive layer is stacked on the adjustment layer, and the circuit layer is stacked on the vertical conductive layer.

[0110] S1203 , bonding the adjustment layer, the vertical conductive layer and the circuit layer to form the partition electrode.

[0111] Specifically, the adjustment layer, the vertical conductive layer and the circuit layer are joined together to form the partition electrode.

[0112] For example, the vertical conductive layer is made of an anisotropic conductive film. After the adjustment layer is manufactured, the adjustment layer, the anisotropic conductive film and the circuit layer can be combined into one by lamination to form the partition electrode.

[0113] For example, the vertical conductive layer uses double-sided conductive adhesive. Since the double-sided conductive adhesive itself is sticky, after the adjustment layer is made, the double-sided conductive adhesive is stacked on the adjustment layer, and the double-sided conductive adhesive will be bonded to the adjustment layer. Then the circuit layer is stacked on the double-sided conductive adhesive, and the circuit layer is bonded to the double-sided conductive adhesive. In this way, the adjustment layer, the double-sided conductive adhesive and the circuit layer are bonded together through the double-sided conductive adhesive to form the partitioned electrode.

[0114] On the basis of the above embodiments, further, the circuit layer includes a gold finger area; accordingly, the method further includes:

[0115] The gold finger region is subjected to surface treatment to obtain a gold finger region with a target resistance value.

[0116] Specifically, the circuit layer includes a gold finger region, and by performing surface treatment on the gold finger region, the resistance of the original gold finger region can be increased or reduced to obtain a gold finger region with a target resistance value. The increase in the resistance of the gold finger region increases the resistance of the circuit layer, thereby increasing the voltage drop of the conductive partition; the decrease in the resistance of the gold finger region reduces the resistance of the circuit layer, thereby reducing the voltage drop of the conductive partition.

[0117] On the basis of the above embodiments, further, the cutting of the plurality of target areas of the dimming film to obtain grooves of the partition electrodes of each conductive partition includes:

[0118] The conductive material layer included in the conductive partition corresponding to at least one of the target areas is cut to increase the sheet resistance of the corresponding conductive material layer.

[0119] Specifically, in order to increase the square resistance of the conductive material layer of the conductive partition, when cutting the target area of ​​the dimming film, part of the conductive material layer can be removed, thereby increasing the square resistance of the conductive material layer and further increasing the voltage drop of the conductive partition. The cutting depth of the conductive material layer included in the conductive partition corresponding to the target area is preset.

[0120] Table 1 Conductive partition parameter table

[0121]

[0122] Based on the parameters of each conductive partition shown in Table 1, a partition dimming device is manufactured to achieve a gradual dimming effect. Ω represents ohm, and □ represents block resistance.

[0123] The dimming film includes a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer, and the second conductive layer includes four conductive partitions arranged in sequence, corresponding to conductive partition a, conductive partition b, conductive partition c and conductive partition d in Table 1. The four conductive partitions are rectangular parallelepipeds with equal length, width and thickness.

[0124] Liquid crystal activation is performed on the four target areas of the dimming film, and the surface of the second conductive layer close to the liquid crystal layer where the partition electrodes are to be made is scanned by laser to separate the liquid crystal layer from the second conductive layer. The partition electrodes of each conductive partition of the second conductive layer correspond to one target area.

[0125] Cut each target area of ​​the dimming film, and cut out the grooves corresponding to each partition electrode. Since the ITO square resistance value of the conductive partition a adopts the original nominal value, the grooves corresponding to the partition electrodes of the conductive partition a will not cut the surface of the conductive partition a close to the glass layer. The ITO square resistance value of the conductive partition b, the ITO square resistance value of the conductive partition c, and the ITO square resistance value of the conductive partition d increase in sequence on the basis of the original nominal value, and grooves will be cut on the surfaces of the conductive partition b, the conductive partition c, and the conductive partition d close to the glass layer, respectively, and the depths of the grooves cut on the surfaces of the conductive partition b, the conductive partition c, and the conductive partition d close to the glass layer increase in sequence, and the increase in depth corresponds to the increase in the ITO square resistance value based on the original nominal value.

[0126] For conductive partition a, an adjustment layer is made in the groove corresponding to the partition electrode of conductive partition a. The adjustment layer uses silver paste with a silver powder content of 80%, and the silver paste can be attached to the bottom surface of the groove corresponding to the partition electrode of conductive partition a by screen printing. For conductive partitions b, conductive partitions c, and conductive partitions d, the adjustment layer of the partition electrode uses silver paste with a silver powder content of 72%, and the adjustment layer is made in the groove corresponding to the partition electrode of each of conductive partitions b, conductive partitions c, and conductive partitions d.

[0127] After the adjustment layer of conductive partition a is completed, ACF and FPC are placed on the adjustment layer in sequence, and then the adjustment layer, ACF and FPC are combined into one by pressing to form the partition electrode of conductive partition a. After the adjustment layer of conductive partition b, conductive partition c and conductive partition d is completed, the process of making each conductive partition is similar to the process of making conductive partition a, and the same FPC is used. The difference is that the conductive particle explosion rate of the ACF of the partition electrode of conductive partition b, conductive partition c and conductive partition d is different.

[0128] When the conductive partition a, the conductive partition b, the conductive partition c and the conductive partition d are connected to an external voltage of 60V, due to the different voltage drops of the conductive partition a, the conductive partition b, the conductive partition c and the conductive partition d, the transmittance of the corresponding areas of the liquid crystal layer are 32.15%, 28.68%, 23.94% and 14.61% respectively, thereby achieving a gradual dimming effect.

[0129] Based on the parameters of each conductive partition shown in Table 2, a partition dimming device is manufactured to achieve a dimming effect of alternating light and dark similar to that of blinds.

[0130] Table 2 Conductive partition parameter table

[0131]

[0132] The dimming film includes a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer, and the first conductive layer includes eight conductive partitions arranged in sequence, corresponding to conductive partition a, conductive partition b, conductive partition c, conductive partition d, conductive partition e, conductive partition f, conductive partition g and conductive partition h in Table 1. The eight conductive partitions are in the shape of long strips, and the length, width and thickness are equal.

[0133] Conductive partition a, conductive partition b, conductive partition c, conductive partition d, conductive partition e, conductive partition f, conductive partition g and conductive partition h are arranged at intervals according to the voltage drop of the voltage reduction. Since conductive partition a, conductive partition c, conductive partition e and conductive partition g have the same partition electrode structure and the same voltage drop, conductive partition a is taken as an example for illustration. Since conductive partition b, conductive partition d, conductive partition f and conductive partition h have the same partition electrode structure and the same voltage drop, conductive partition b is taken as an example for illustration.

[0134] Liquid crystal activation is performed on the target area corresponding to the partition electrode of the conductive partition a of the dimming film, and the surface of the first conductive layer of the partition electrode of the conductive partition a to be manufactured close to the liquid crystal layer is scanned by laser to separate the liquid crystal layer from the first conductive layer. Liquid crystal activation is performed on the target area corresponding to the partition electrode of the conductive partition b of the dimming film, and the surface of the first conductive layer of the partition electrode of the conductive partition b to be manufactured close to the liquid crystal layer is scanned by laser to separate the liquid crystal layer from the first conductive layer.

[0135] The target area corresponding to the partition electrode of the conductive partition a of the dimming film is cut, and the groove corresponding to the partition electrode of the conductive partition a is cut out. Since the ITO square resistance value of the conductive partition a adopts the original nominal value, the groove corresponding to the partition electrode of the conductive partition a will not cut the surface of the conductive partition a close to the glass layer. The target area corresponding to the partition electrode of the conductive partition b of the dimming film is cut, and the groove corresponding to the partition electrode of the conductive partition b is cut out. Since the ITO square resistance value of the conductive partition b increases by 270 on the basis of the original nominal value, a groove will be cut on the surface of the conductive partition b close to the glass layer, and the increase in the depth of the groove cut on the surface of the conductive partition b close to the glass layer corresponds to the increase in the ITO square resistance value based on the original nominal value.

[0136] For conductive partition a, an adjustment layer is made in the groove corresponding to the partition electrode of conductive partition a. The adjustment layer uses silver paste with a silver powder content of 99.8%, and the silver paste can be attached to the bottom surface of the groove corresponding to the partition electrode of conductive partition a by screen printing. For conductive partition b, an adjustment layer is made in the groove corresponding to the partition electrode of conductive partition b. The adjustment layer uses silver paste with a silver powder content of 99.8%, and the silver paste can be attached to the bottom surface of the groove corresponding to the partition electrode of conductive partition b by screen printing.

[0137] After the adjustment layer of the conductive partition a is completed, ACF and FPC are placed on the adjustment layer in sequence, and then the adjustment layer, ACF and FPC are combined into one by pressing to form the partition electrode of the conductive partition a. Among them, the conductive particle explosion rate of ACF is 99.8%.

[0138] After the adjustment layer of the conductive partition b is completed, ACF and FPC are placed on the adjustment layer in sequence, and then the adjustment layer, ACF and FPC are combined into one by pressing to form the partition electrode of the conductive partition b. Among them, the conductive particle explosion rate of ACF is 88.5%. As shown in Table 2, the same FPC is used in the conductive partition a and the conductive partition b.

[0139] The manufacturing process of the partition electrodes of the conductive partitions c, e and g is similar to that of the conductive partition a, and will not be described in detail here. The manufacturing process of the partition electrodes of the conductive partitions d, f and h is similar to that of the conductive partition b, and will not be described in detail here.

[0140] When conductive partition a, conductive partition b, conductive partition c, conductive partition d, conductive partition e, conductive partition f, conductive partition g and conductive partition h are all connected to an external voltage of 48V, since conductive partition a, conductive partition b, conductive partition c, conductive partition d, conductive partition e, conductive partition f, conductive partition g and conductive partition h are arranged at intervals according to the voltage drop, the haze of the corresponding areas of the liquid crystal layer are 98.8%, 85.3%, 98.9%, 85.2%, 98.7%, 85.3%, 98.8% and 85.1% respectively, thereby achieving a dimming effect of alternating light and dark.

[0141] The zone dimming device provided in the embodiment of the present invention can adjust the strength of the electric field inside the device by setting different resistances of various components of the zone electrodes of each conductive zone, thereby affecting the deflection angle of the liquid crystal and causing different transmittances, thereby achieving dimming effects such as gradient, blinds, and presets.

[0142] In the description of this specification, the description with reference to the terms "one embodiment", "a specific embodiment", "some embodiments", "for example", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0143] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A zone dimming device, characterized in that: The invention comprises a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer stacked in sequence, wherein: The first conductive layer or the second conductive layer includes multiple conductive partitions, each conductive partition includes a partition electrode and a conductive material layer, and the partition electrode is electrically connected to the conductive material layer; there are conductive partitions with different voltage drops among the multiple conductive partitions, and the voltage drop of each conductive partition is jointly determined by the partition electrode and the conductive material layer included in the conductive partition.

2. The zone dimming device according to claim 1, characterized in that: The partition electrode includes a vertical conductive layer and a circuit layer stacked in sequence, the vertical conductive layer is electrically connected to the conductive material layer of the conductive partition where the partition electrode is located; the conductivity of the partition electrode is jointly determined by the circuit layer and the vertical conductive layer.

3. The zone dimming device according to claim 1, characterized in that: The partition electrode includes an adjustment layer, a vertical conductive layer and a circuit layer stacked in sequence, and the adjustment layer is electrically connected to the conductive material layer of the conductive partition where the partition electrode is located; the conductivity of the partition electrode is jointly determined by the circuit layer, the vertical conductive layer and the adjustment layer.

4. The zone dimming device according to claim 2 or 3, characterized in that: A gold finger area that has undergone surface treatment is arranged on the circuit layer to increase or decrease the voltage drop of the partition electrode.

5. The zone dimming device according to claim 1, characterized in that: The first conductive layer and the second conductive layer respectively include multiple conductive partitions, and there are conductive partitions with different voltage drops among the multiple conductive partitions included in the first conductive layer; there are conductive partitions with different voltage drops among the multiple conductive partitions included in the second conductive layer, and the conductive partitions included in the first conductive layer and the second conductive layer correspond one to one.

6. The zone dimming device according to claim 1 or 5, characterized in that: The plurality of conductive partitions are arranged in sequence according to the magnitude of the voltage drop, or the plurality of conductive partitions are arranged at intervals according to the magnitude of the voltage drop.

7. The zone dimming device according to claim 1 or 5, characterized in that: The plurality of conductive partitions are used to display a preset pattern.

8. A dimming glass, characterized in that: It comprises the zone dimming device as described in any one of claims 1 to 7.

9. A method for manufacturing a zone dimming device, characterized in that: include: Liquid crystal activation is performed on multiple target areas of the dimming film; wherein the dimming film comprises a first transparent substrate layer, a first conductive layer, a liquid crystal layer, a second conductive layer and a second transparent substrate layer; the first conductive layer and / or the second conductive layer comprises a plurality of conductive partitions; each conductive partition corresponds to a target area; Cutting a plurality of target areas of the dimming film to obtain grooves corresponding to the partition electrodes of each conductive partition; Partition electrodes are made in the grooves corresponding to the partition electrodes of each conductive partition, so that conductive partitions with different voltage drops exist among the multiple conductive partitions; wherein the voltage drop of each conductive partition is jointly determined by the partition electrodes included in the conductive partition and the conductive material layer included in the conductive partition.

10. The method for manufacturing a zone dimming device according to claim 9, characterized in that: The manufacturing of a partition electrode in the groove of each conductive partition comprises: placing a vertical conductive layer and a circuit layer in sequence in the groove; The vertical conductive layer and the circuit layer are bonded to form the partition electrode.

11. The method for manufacturing a zone dimming device according to claim 9, characterized in that: The manufacturing of the partition electrode in the groove corresponding to the partition electrode of each conductive partition comprises: forming a regulating layer in the groove; placing a vertical conductive layer and a circuit layer in sequence on the adjustment layer; The adjustment layer, the vertical conductive layer and the circuit layer are bonded to form the partition electrode.

12. The method for manufacturing a zone dimming device according to claim 10 or 11, characterized in that: The circuit layer includes a gold finger area; accordingly, the method further includes: The gold finger region is subjected to surface treatment to obtain a gold finger region with a target resistance value.

13. The method for manufacturing a zone dimming device according to claim 9, characterized in that: The step of cutting the plurality of target areas of the dimming film to obtain grooves corresponding to the partition electrodes of each conductive partition comprises: The conductive material layer included in the conductive partition corresponding to at least one of the target areas is cut to increase the sheet resistance of the corresponding conductive material layer.

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