CN111413816A

CN111413816A - Optical modulator and method for manufacturing optical modulator

Info

Publication number: CN111413816A
Application number: CN202010355819.5A
Authority: CN
Inventors: 林柏全; 席克瑞; 欧阳珺婷; 贾振宇; 秦锋; 彭旭辉
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-07-14

Abstract

The invention discloses a light modulation device and a preparation method thereof, wherein the light modulation device comprises: the first substrate, the second substrate and the third substrate are sequentially arranged at intervals, the first substrate comprises a first substrate and a first electrode layer connected with the first substrate, the first substrate comprises a first connecting part, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, the second electrode layer is a surface electrode, and the third substrate comprises a third substrate and a third electrode layer connected with the third substrate; the liquid crystal display panel comprises a first liquid crystal layer and a second liquid crystal layer, wherein the first liquid crystal layer is clamped between a first substrate and a second substrate, and the second liquid crystal layer is clamped between the second substrate and a third substrate; and the first circuit board is at least partially overlapped and connected with the first connecting part of the first substrate. The light modulation device provided by the invention has higher light transmittance and smaller thickness, and can be stably connected with the first circuit board.

Description

Optical modulator and method for manufacturing optical modulator

Technical Field

The invention relates to the technical field of light modulation, in particular to a light modulation device and a preparation method of the light modulation device.

Background

With the rapid development of the light modulation device, the demand of the user on the light modulation device is increasing, for example, the light transmittance of the light modulation device is required to be higher by the user, and the user also wants the light modulation device to have a display function.

In some light modulation devices, including two liquid crystal cells stacked one on another, a connection glue layer is generally disposed between the two liquid crystal cells to form the light modulation device, but at this time, light passing through the light modulation device may be reflected or refracted multiple times between the connection glue layer or the air layer between the two liquid crystal cells, resulting in light loss, thereby reducing light transmittance of the light modulation device. Furthermore, each liquid crystal box comprises two layers of substrates which are oppositely arranged, and four layers of substrates are required to be used in the same light modulation device, so that the thickness of the light modulation device is larger. When the light modulation device has a display function, a complicated wiring structure is also required.

Therefore, it is desirable to provide an optical modulation device and a method for manufacturing the optical modulation device.

Disclosure of Invention

The invention provides a light modulation device and a preparation method thereof.

In one aspect, an embodiment of the present invention provides an optical modulation apparatus, including: the first substrate comprises a first substrate and a first electrode layer connected with the first substrate, the first substrate comprises a first connecting part, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, the second electrode layer is a surface electrode, and the third substrate comprises a third substrate and a third electrode layer connected with the third substrate; the liquid crystal display comprises a first liquid crystal layer and a second liquid crystal layer, wherein the first liquid crystal layer is clamped between a first substrate and a second substrate, the second liquid crystal layer is clamped between a second substrate and a third substrate, a second electrode layer and the first electrode layer are used for driving liquid crystal molecules in the first liquid crystal layer to deflect, and/or a second electrode layer and a third electrode layer are used for driving liquid crystal molecules in the second liquid crystal layer to deflect; and the first circuit board is at least partially overlapped and connected with the first connecting part of the first substrate.

On the other hand, an embodiment of the present invention further provides a method for manufacturing a light modulation device, including: forming a first substrate motherboard, including forming a first electrode layer on a first substrate motherboard; forming a second substrate motherboard including forming a second electrode layer on the second substrate motherboard; a plurality of first liquid crystal layers which are arranged at intervals are clamped between the first substrate mother board and the second substrate mother board; forming a third substrate mother board, and forming a third electrode layer on the third substrate mother board; a plurality of second liquid crystal layers which are arranged at intervals are clamped between the second substrate mother board and the third substrate mother board; cutting a first substrate mother board, a second substrate mother board and a third substrate mother board to form a plurality of light modulation assemblies, wherein each light modulation assembly comprises a first substrate, a second substrate and a third substrate which are sequentially arranged at intervals, the first substrate comprises a first substrate and a first electrode layer connected with the first substrate, the first substrate comprises a first connecting part, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, the second electrode layer is a surface electrode, and the third substrate comprises a third substrate and a third electrode layer connected with the third substrate; and overlapping and connecting at least part of the first circuit board and the first connecting part of the light modulation component to form a light modulation device.

In another aspect, an embodiment of the present invention further provides a method for manufacturing a light modulation device, including: forming a first substrate, forming a first electrode layer on the first substrate, the first substrate including a first connection portion, an orthographic projection of the first connection portion in a thickness direction of the light modulation device being located on an outer peripheral side of an orthographic projection of the first liquid crystal layer in the thickness direction of the light modulation device; forming a second substrate, and forming a second electrode layer on the second substrate, wherein the second electrode layer is a surface electrode; a first liquid crystal layer is sandwiched between the first substrate and the second substrate; forming a third substrate, and forming a third electrode layer on the third substrate; a second liquid crystal layer is sandwiched between the second substrate and the third substrate; the first wiring board is overlapped and connected with at least a part of the first connection portion to form a light modulation device.

According to the light modulation device and the preparation method of the light modulation device, the light modulation device comprises a first substrate, a second substrate, a third substrate, a first liquid crystal layer, a second liquid crystal layer and a first circuit board, the first liquid crystal layer is clamped between the first substrate and the second substrate to form a first liquid crystal box, the second liquid crystal layer is clamped between the second substrate and the third substrate to form a second liquid crystal box, the first liquid crystal box and the second liquid crystal box can share the second substrate, and compared with the conventional two liquid crystal boxes which need four substrates and need a connecting glue layer arranged between the two liquid crystal boxes, the light modulation device provided by the embodiment of the invention needs three substrates and omits the arrangement of the connecting glue layer, the thickness of the light modulation device is effectively reduced, and the light transmittance of the light modulation device is effectively improved.

Meanwhile, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, wherein the second electrode layer is a surface electrode, and the surface electrode is arranged on the second substrate and can block electric field signals in two liquid crystal boxes from influencing the electric field signals in adjacent liquid crystal boxes through gaps between the electrode blocks compared with a plurality of electrode blocks arranged at intervals, so that the surface electrode can effectively prevent the mutual interference of the electric field signals in the first liquid crystal box and the second liquid crystal box, the stability of the light modulation device is improved, a public electric signal can be input into the surface electrode, and the electrode layer for transmitting the public electric signal is manufactured into the surface electrode, so that the manufacturing process can be simplified, and the cost is saved.

Furthermore, the first substrate comprises a first connecting portion, the first circuit board is at least partially overlapped and connected with the first connecting portion, because the first connecting portion is arranged on the first substrate, when the first connecting portion is bound with the first circuit board, the first connecting portion and the first substrate are respectively contacted with the binding platform, the first connecting portion can be supported by the first substrate or the binding platform is stable, the first substrate can play a stable supporting role in the binding process of the first circuit board and the first connecting portion, and the situation that the light modulation device is damaged due to the fact that the first circuit board and the first connecting portion are unreasonably positioned and are affected by external force in the binding process is effectively prevented.

Drawings

Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

FIG. 1 is a top view of a light modulating device provided by one embodiment of the present invention;

FIG. 2 is a cross-sectional view of one example of the light modulation device provided in FIG. 1 taken along the A-A direction;

FIG. 3 is a cross-sectional view of another example light modulation device provided in FIG. 1 taken along A-A;

fig. 4 is a cross-sectional view of a light modulation device provided as still another example in fig. 1, taken along a direction a-a, and fig. 4 shows a structure of the light modulation device in a first state;

FIG. 5 is a schematic diagram of the light modulating device provided in FIG. 4 in a second state;

FIG. 6 is a cross-sectional view of a light modulation device provided in yet another example of FIG. 1 taken along A-A;

FIG. 7 is a graph comparing transmittance and driving voltage of three liquid crystal cells;

FIG. 8 is a schematic flow chart of a method for fabricating a light modulating device according to one embodiment of the present invention;

FIGS. 9-17 are schematic diagrams of corresponding structures of a method of fabricating a light modulating device according to one embodiment of the present invention;

fig. 18 is a schematic flow chart of a method for manufacturing a light modulation device according to another embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The embodiment of the invention provides a light modulation device 1000 and a preparation method thereof. The light modulation device 1000 and the method of manufacturing the light modulation device according to the embodiment of the present invention will be described in detail below with reference to the drawings.

Referring to fig. 1 and 2 together, fig. 1 is a top view of a light modulation device according to an embodiment of the present invention, and fig. 2 is a cross-sectional view of the light modulation device along a direction a-a in fig. 1. The embodiment of the invention provides a light modulation device 1000, which comprises a first substrate 10, a second substrate 20, a third substrate 30, a first liquid crystal layer 41, a second liquid crystal layer 42 and a first circuit board 51, wherein the first substrate 10, the second substrate 20 and the third substrate 30 are sequentially arranged at intervals.

The first substrate 10 includes a first substrate 11 and a first electrode layer 12 connected to the first substrate 11, the first substrate 11 includes a first connection portion 111, the second substrate 20 includes a second substrate 21 and a second electrode layer 22 connected to the second substrate 21, the second electrode layer 22 is a surface electrode, and the third substrate 30 includes a third substrate 31 and a third electrode layer 32 connected to the third substrate 31. The first liquid crystal layer 41 is sandwiched between the first substrate 10 and the second substrate 20, the second liquid crystal layer 42 is sandwiched between the second substrate 20 and the third substrate 30, the second electrode layer 22 and the first electrode layer 12 are used for driving liquid crystal molecules in the first liquid crystal layer 41 to deflect, and/or the second electrode layer 22 and the third electrode layer 32 are used for driving liquid crystal molecules in the second liquid crystal layer 42 to deflect. The first wiring board 51 is at least partially overlapped and connected with the first connection portion 111 of the first substrate 11.

The first substrate 10, the second substrate 20, and the first liquid crystal layer 41 sandwiched between the first substrate 10 and the second substrate 20 form a first liquid crystal cell, the second substrate 20, the third substrate 30, and the second liquid crystal layer 42 sandwiched between the second substrate 20 and the third substrate 30 form a second liquid crystal cell, and the first liquid crystal cell and the second liquid crystal cell share at least a part of a film structure of the second substrate 20.

Compared with the conventional light modulation device 1000 which requires four substrates and a connecting glue layer between two liquid crystal cells, the light modulation device 1000 provided by the embodiment of the invention requires three substrates and omits the connecting glue layer, so that the thickness of the light modulation device 1000 is effectively reduced, and the light transmittance of the light modulation device 1000 is effectively improved. Meanwhile, compared with a plurality of electrode blocks arranged at intervals, the surface electrode arranged on the second substrate 20 can block electric field signals in two liquid crystal boxes from affecting electric field signals in adjacent liquid crystal boxes through gaps between the electrode blocks, so that the surface electrode can effectively prevent mutual interference of the electric field signals in the first liquid crystal box and the second liquid crystal box, and stability of the light modulation device 1000 is improved. Further, because the first connection portion 111 is disposed on the first substrate 11, when the first connection portion 111 is bonded to the first circuit board 51, the first connection portion 111 and the first substrate 11 are respectively in contact with the bonding platform, so that the first connection portion 111 can be supported by the first substrate 11 or the bonding platform stably, and the first circuit board 51 and the first connection portion 111 are effectively prevented from being damaged by an external force applied to the first circuit board 51 and the first connection portion 111 in the bonding process due to unreasonable arrangement positions of the first connection portion 111.

In order to reduce the bezel of the optical modulation device 1000, the first substrate 11 may be rigid, such as a glass substrate, or flexible, such as a PolyimiDe (PI) substrate. Referring to fig. 3, fig. 3 is a cross-sectional view of another exemplary light modulation device of fig. 1 taken along a-a. When the first substrate 11 is a flexible substrate, after the first connection portion 111 and the first circuit board 51 are bonded, the first connection portion 111 of the first substrate 11 and the first circuit board 51 may be bent integrally to a side of the first substrate 11 away from the first liquid crystal layer 41.

In order to enable the light modulation device 1000 to have a display effect, the first electrode layer 12 of the light modulation device 1000 includes a plurality of electrode blocks arranged in an array, and the light modulation device 1000 can have the display effect when a preset voltage is configured between the plurality of electrode blocks and the second electrode layer 22. At least one of the first liquid crystal cell and the second liquid crystal cell may have a display function, so as to realize a display function of the light modulation device 1000. When the first liquid crystal cell and the second liquid crystal cell have a display function together, the first liquid crystal cell and the second liquid crystal cell can form a display screen together, for example, the first liquid crystal cell displays a part of the number "8", and the second liquid crystal cell displays another part of the number "8". Of course. The two liquid crystal cells may also display the number "8" together, in which case the display contents of the two liquid crystal cells are only allowed to coincide with each other. The light modulation device 1000 may display at least one of time, weather, or characters to meet the diverse needs of users.

Further, when the first electrode layer 12 includes a plurality of electrode blocks arranged in an array, a complex routing structure needs to be provided to connect with the electrode blocks, so as to supply power to the plurality of electrode blocks respectively. In order to set a reasonable routing structure, the first Circuit board 51 of the embodiment of the invention may be a Flexible Printed Circuit (FPC), and the electrode blocks in the first electrode layer 12 are electrically connected to a control element, such as a power control element, through the FPC.

With reference to fig. 2, in some embodiments, the orthographic projection of the first connecting portion 111 along the thickness direction of the light modulation device 1000 is located on the outer periphery of the orthographic projection of the first liquid crystal layer 41 along the thickness direction of the light modulation device 1000, at this time, the orthographic projection of the first connecting portion 111 along the thickness direction of the light modulation device 1000 does not overlap with the orthographic projection of the first liquid crystal layer 41 along the thickness direction of the light modulation device 1000, and at this time, the first connecting portion 111 and the first liquid crystal cell form a step structure, which facilitates the binding connection of the first circuit board 51. The first connection portion 111 may be formed integrally with the first substrate 11, or the first connection portion 111 may be a separate connection structure, so that the first connection portion 111 and the first substrate 11 can be stably connected.

It can be understood that, when the orthographic projection of the first connecting portion 111 in the thickness direction of the light modulation device 1000 is located at the outer peripheral side of the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, the orthographic projection of the first connecting portion 111 in the thickness direction of the light modulation device 1000 may surround the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, and at this time, the step structure formed by the first connecting portion 111 and the first liquid crystal cell is located in the whole circumference direction of the first liquid crystal cell, so that the first circuit board 51 is conveniently bonded with the first connecting portion 111 at each. Or, an orthogonal projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 may surround a portion of an orthogonal projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, specifically, when the orthogonal projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000 is a rectangle, the orthogonal projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 may be correspondingly located at one side of the rectangle, and at this time, the step structure formed by the first connection portion 111 and the first liquid crystal box is located at one side of the first liquid crystal box.

When the second liquid crystal cell has a display function, the second substrate 21 may include a second connection portion 211, an orthogonal projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 is located on an outer peripheral side of an orthogonal projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, when the orthogonal projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 does not overlap with an orthogonal projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, and the orthogonal projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 overlaps with an orthogonal projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, and the second connection portion 211 and the first connection portion 111 are located on the same side of the second substrate 21 in the plane direction along the second substrate 21. The light modulation device 1000 further includes a second wiring board 52, and the second wiring board 52 overlaps and is connected to at least a portion of the second connection portion 211. Through the above arrangement, in the thickness direction of the light modulation device 1000, the orthographic projection of the second liquid crystal cell is located inside the orthographic projection of the first liquid crystal cell, so that the first liquid crystal cell can play a stable supporting role in the binding process of the second circuit board 52 and the second connecting part 211, and the situation that the second circuit board 52 and the second connecting part 211 are damaged by external force applied to the second circuit board 52 and the second connecting part 211 in the binding process due to unreasonable arrangement positions of the second connecting part 211 is effectively prevented, for example, when the second substrate 21 is only protruded out of the arrangement of the first liquid crystal cell and the second liquid crystal cell, the second connecting part 211 of the second substrate 21 is not sufficiently supported when being bound with the second circuit board 52, and the second substrate 21 is broken. When the orthographic projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 is located on the outer periphery side of the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, the orthographic projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 may surround the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, in this case, the second connection portion 211 is disposed on the entire circumference of the light modulation device 1000, or the orthographic projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 may surround the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, in this case, the second connection portion 211 may be disposed.

Further, the orthographic projection of the second connection portion 211 on the first substrate 11 may overlap the first connection portion 111, when the light modulation device 1000 includes the first circuit board 51 and the second circuit board 52, the second circuit board 52 may be firstly bound on the second connection portion 211, at this time, the first liquid crystal cell may play a good role in supporting the binding of the second circuit board 52 and the second connection portion 211, and then the first circuit board 51 may be bound on the first connection portion 111.

In some embodiments, in order to improve the manufacturing efficiency of the light modulation device 1000, the orthographic projection of the second connection portion 211 on the first substrate 11 may not overlap the first connection portion 111, and at this time, in the planar direction of the light modulation device 1000, the first connection portion 111 and the second connection portion 211 are staggered from each other, so that the bonding process of the first connection portion 111 and the first wiring board 51, and the bonding process of the second connection portion 211 and the second wiring board 52 can be performed simultaneously.

In some embodiments, the light modulation device 1000 further includes a package structure, and when the first connection portion 111 forms a step structure with the first liquid crystal cell and/or the first liquid crystal cell forms a step structure with the second liquid crystal cell, the package structure may be disposed at the step structure for packaging the step of the light modulation device 1000, and optionally, the package structure may be Ultraviolet light curing (UV) glue, silicon glue, or moisture-proof insulating (tuffy) glue, etc. In some embodiments, the light modulation device 1000 further includes a package box such as a bezel, which is disposed on the outer peripheral sides of the first liquid crystal cell and the second liquid crystal cell, and the mounting of the light modulation device 1000 may be facilitated by disposing the package box, for example, by disposing a mounting member on the package box, and by mounting the light modulation device 1000 on an airplane or a high-speed rail by the mounting member.

Referring to fig. 4, fig. 4 is a cross-sectional view of a light modulation device along a direction a-a of still another example of the light modulation device of fig. 1, and fig. 4 shows a structure of the light modulation device in a first state. In order to facilitate the connection of the first wiring board 51 and the first connection portion 111, an orthographic projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 and an orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000 do not overlap, so that a step structure is formed between the first substrate 11 and the first liquid crystal cell. The third substrate 31 may include a third connection portion 311, an orthogonal projection of the third connection portion 311 in the thickness direction of the light modulation device 1000 is located on an outer peripheral side of an orthogonal projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, when the orthogonal projection of the third connection portion 311 in the thickness direction of the light modulation device 1000 does not overlap with the orthogonal projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, and the third connection portion 311 and the first connection portion 111 are located on different sides of the second substrate 21 in the planar direction of the second substrate 21, respectively. The light modulation device 1000 further includes a third wiring board 53 at least partially overlapping and connected to the third connection portion 311. Through the above arrangement, when the third connection portion 311 and the third circuit board 53 are bound, the third substrate 31 is placed on the binding platform, and the third substrate 31 and the third connection portion 311 can be in contact with the binding platform, so that the third connection portion 311 and the third circuit board 53 can be stably supported by the third substrate 31 or the binding platform in the binding process, and the light modulation device 1000 is effectively prevented from being damaged due to the fact that the third circuit board 53 and the third connection portion 311 are subjected to an external force action in the binding process due to unreasonable arrangement positions of the third connection portion 311.

Further, the fact that the orthographic projection of the third connecting portion 311 in the thickness direction of the light modulation device 1000 is located on the outer periphery side of the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000 may mean that the orthographic projection of the third connecting portion 311 in the thickness direction of the light modulation device 1000 surrounds the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000 in the entire circumference direction of the light modulation device 1000, in this case, the third connecting portion 311 is located on the entire circumference direction of the light modulation device 1000, or the orthographic projection of the third connecting portion 311 in the thickness direction of the light modulation device 1000 may surround the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation.

In order to facilitate stable connection of the wiring boards and the connection portions, in some embodiments, the third connection portion 311 and the first connection portion 111 are respectively located on opposite sides of the second substrate 21 in a planar direction along the second substrate 21, the first connection portion 111 has a first connection face connected to the first wiring board 51, and the third connection portion 311 has a second connection face connected to the third wiring board 53, the first connection face and the second connection face being opposite in orientation. Through the arrangement, the third connection portion 311 is stably connected with the third circuit board 53, and the first connection portion 111 is stably connected with the first circuit board 51, so that the problems of insufficient space or mutual interference between the first connection portion 111 and the second connection portion 211 when the third circuit board 53 and the first circuit board 51 are bound are effectively prevented. By reasonably setting the positions of the first connecting portion 111 and the third connecting portion 311, the process feasibility of connecting each connecting portion of the light modulation device 1000 with a corresponding circuit board can be effectively increased.

In some embodiments, the second electrode layer 22 and the first electrode layer 12 are used for driving the liquid crystal molecules in the first liquid crystal layer 41 to deflect, and the second electrode layer 22 and the third electrode layer 32 are used for driving the liquid crystal molecules in the second liquid crystal layer 42 to deflect. Through the arrangement, the first liquid crystal layer 41 and the second liquid crystal layer 42 can be aligned under the action of a stable electric field, and meanwhile, the first liquid crystal cell and the second liquid crystal cell can share the second electrode layer 22, so that the manufacturing process can be simplified, and meanwhile, the cost is saved.

When the first liquid crystal cell and the second liquid crystal cell share the second electrode layer 22, optionally, the first electrode layer 12 is a planar electrode, or the first electrode layer 12 includes a plurality of electrode blocks arranged in an array. The third electrode layer 32 is a planar electrode, or the third electrode layer 32 includes a plurality of electrode blocks arranged in an array. Through the above arrangement, the first liquid crystal cell and/or the second liquid crystal cell in the light modulation device 1000 have a display function, so as to meet the diversity requirements of users.

In a specific implementation, the first electrode layer 12 includes a plurality of electrode blocks arranged in an array, and a display screen can be formed by supplying power between the plurality of electrode blocks and the second electrode layer 22, so that the first liquid crystal cell can display a screen. Since the first electrode layer 12 includes a plurality of electrode blocks, the first circuit board 51 can be electrically connected to the plurality of electrode blocks by connecting the first circuit board 51 to the first connection portion 111, so that the first circuit board 51 can stably supply power to the electrode blocks on the first electrode layer 51. Further, when the third electrode layer 32 is a plane electrode, the second liquid crystal cell does not have a display function, and may be connected to the second electrode layer 22 and the third electrode layer 32 through a wire structure in order to apply a voltage between the second electrode layer 22 and the third electrode layer 32.

Further, referring to fig. 4, in order to enable the second liquid crystal cell to have a display function, the third electrode layer 32 may include a plurality of electrode blocks arranged in an array, and at this time, the third substrate 31 includes a third connection portion 311, which facilitates the binding of the third circuit board 53, so that the third circuit board 53 is electrically connected to the plurality of electrode blocks on the third electrode layer 32, so that the third circuit board 53 stably supplies power to the electrode blocks on the third electrode layer 32.

In some embodiments, the second electrode layer 22 is located on the surface of the second substrate 21 facing the first liquid crystal layer 41, the second substrate 20 further includes a fourth electrode layer 23, and the fourth electrode layer 23 is located on the surface of the second substrate 21 facing the second liquid crystal layer 42, in this case, the first electrode layer 12 may be a planar electrode, or the first electrode layer 12 includes a plurality of electrode blocks arranged in an array. The third electrode layer 32 and the fourth electrode layer 23 are both surface electrodes, or one of the third electrode layer 32 and the fourth electrode layer 23 is a surface electrode, and the other includes a plurality of electrode blocks arranged in an array.

In specific implementation, as shown in fig. 2, the first electrode layer 12 includes a plurality of electrode blocks arranged in an array, the fourth electrode layer 23 includes a plurality of electrode blocks arranged in an array, and the second electrode layer 22 and the third electrode layer 32 are planar electrodes, and at this time, both the first liquid crystal cell and the second liquid crystal cell have a display function. And the second wiring board 52 may be electrically connected to the electrode blocks in the fourth electrode layer 23 to supply power to the plurality of electrode blocks in the fourth electrode layer 23.

In some embodiments, the first liquid crystal layer 41 is a first guest-host liquid crystal layer, and in this case, the first liquid crystal layer is a first guest-host effect layer, the first guest-host effect layer includes first liquid crystal molecules 411 and first dye molecules 412, and the orientations of the first liquid crystal molecules 411 and the first dye molecules 412 are the same.

A description will next be given of a Guest-host cell (Guest-host L iquid Crystal, GH L C) comprising liquid Crystal molecules and dye molecules, the liquid Crystal molecules having dielectric and refractive index anisotropy such that the alignment of the liquid Crystal molecules can be altered by the action of an electric field, the dye molecules being free of dielectric anisotropy, i.e., the dye molecules are not controlled by the electric field, but will "Guest-host" when dissolved in a host of aligned liquid Crystal molecules, align in the same direction as the liquid Crystal molecules.

Further, the liquid crystal molecules include positive liquid crystal molecules and negative liquid crystal molecules, and the dielectric constant in the long axis direction of the positive liquid crystal molecules is larger than that in the short axis direction, so that the long axis direction of the positive liquid crystal molecules can be deflected in a direction parallel to the electric field when the positive liquid crystal molecules are controlled by the electric field. The dielectric constant in the long axis direction of the negative liquid crystal molecules is smaller than that in the short axis direction, so that the long axis direction of the negative liquid crystal molecules can be deflected in the direction perpendicular to the electric field when the negative liquid crystal molecules are controlled by the electric field.

Accordingly, in some embodiments, the first liquid crystal molecules 411 may be either positive liquid crystal molecules or negative liquid crystal molecules, and the first dye molecules 412 may be either positive dye molecules or negative dye molecules. Alternatively, the first liquid crystal molecules 411 are positive liquid crystal molecules, and the first dye molecules 412 are negative dichroic dye molecules (n-type dye molecules). By phase-matching the positive liquid crystal molecules with the negative dichroic dye, the light modulation device 1000 can effectively adjust the light transmittance. Specifically, the first liquid crystal molecules 411 may have a rod-like structure, and the first dye molecules 412 may also have a rod-like structure. By setting the first liquid crystal cell as a guest-host liquid crystal cell, when a user needs to reduce the light transmittance of the light modulation device 1000, the user's requirement can be met by changing the orientation of the first liquid crystal molecules in the first liquid crystal layer.

In some embodiments, the second liquid crystal layer 42 is a second guest-host liquid crystal layer, and the second liquid crystal cell is a second guest-host effect cell, and the second guest-host effect layer includes second liquid crystal molecules 421 and second dye molecules 422, and the orientations of the second liquid crystal molecules 421 and the second dye molecules 422 are the same. In a specific implementation, the second liquid crystal molecule 421 may also be any one of a positive liquid crystal molecule or a negative liquid crystal molecule, and the second dye molecule 422 may be any one of a positive dye molecule and a negative dye molecule, and specific combination manners and combination proportions of the types of the liquid crystal molecules and the types of the dye molecules in the first liquid crystal cell and the second liquid crystal cell in the embodiment of the present invention are not described again, as long as the modulation effect on light rays can be achieved. The first liquid crystal molecule 411 and the second liquid crystal molecule 421 are both positive liquid crystal molecules, and the first dye molecule 412 and the second dye molecule 422 are negative dye molecules.

When the first liquid crystal molecule 411 and the second liquid crystal molecule 421 are both positive liquid crystal molecules and the first dye molecule 412 and the second dye molecule 422 are negative dye molecules, the long axis directions of the first liquid crystal molecule 411 and the second liquid crystal molecule 421 are adjusted to be perpendicular to each other, and the long axis directions of the first dye molecule 412 and the second dye molecule 422 are also perpendicular (orthogonal) to each other, so that the first dye molecule 412 and the second dye molecule 422 effectively absorb light, and a good antireflection effect can be achieved, thereby saving the use of the polarizer, and compared with a polarizer, in the embodiment of the invention, the transmittance of the light can be adjusted by adjusting the orientations of the first liquid crystal molecule 411 and the second liquid crystal molecule 421, so that the light modulation device 1000 has multiple modes.

Referring to fig. 4 and 5, fig. 5 is a schematic structural diagram of the light modulation device provided in fig. 4 in a second state. When the first liquid crystal cell is a first guest-host liquid crystal cell and the second liquid crystal cell is a second guest-host liquid crystal cell, the light modulation device 1000 may have a first state in which the long axis direction of the first liquid crystal molecules 411 and the long axis direction of the second liquid crystal molecules are parallel to each other and a second state in which the long axis direction of the first liquid crystal molecules 411 and the long axis direction of the second liquid crystal molecules are perpendicular to each other. Through the above arrangement, the liquid crystals in the first liquid crystal cell and the second liquid crystal cell in the optical modulation device 1000 are both in a Vertical Alignment (VA) display mode, at this time, the light transmittance of the optical modulation device 1000 may reach 45%, and by setting the liquid crystal cells in the optical modulation device 1000 to the VA display mode, at this time, the optical modulation device 1000 may omit the arrangement of the polarizer, thereby preventing the transmittance on the optical modulation device 1000 from being reduced due to the existence of the polarizer in other display modes, for example, a Twist (TN) display mode.

In order to align the first liquid crystal molecules 411 in the first liquid crystal layer 41 and the second liquid crystal molecules in the second liquid crystal layer 42, the first substrate 10 in the light modulation device 1000 further includes a first alignment layer 13, the first alignment layer 13 is located on the side of the first electrode layer 12 facing the first liquid crystal layer 41, the second substrate 20 further includes a second alignment layer 24 and a fourth alignment layer 25, the fourth alignment layer 25 is located on the side of the second substrate 21 facing the first liquid crystal layer 41, the second alignment layer 24 is located on the side of the second substrate 21 facing the second liquid crystal layer 42, the third substrate 30 further includes a third alignment layer 33, the third alignment layer 33 is located on the side of the third substrate 31 facing the second liquid crystal layer 42, with the above arrangement, the first alignment layer 13 and the fourth alignment layer 25 can cooperate with each other to achieve alignment of the first liquid crystal molecules 411, and the third alignment layer 33 and the second alignment layer 24 cooperate with each other to achieve alignment of the second liquid crystal molecules 421.

In some embodiments, when no voltage is applied to the first electrode layer 12, the second electrode layer 22, and the third electrode layer 32, respectively, the light modulation device 1000 is in the first state, the long axis direction of the first liquid crystal molecules 411 and the long axis direction of the second liquid crystal molecules are both perpendicular to the surface of the first electrode layer 12 facing the first liquid crystal layer 41, and when a voltage is applied to the first electrode layer 12, the second electrode layer 22, and the third electrode layer 32, the light modulation device 1000 is in the second state, the long axis direction of the first liquid crystal molecules 411 and the long axis direction of the second liquid crystal molecules are both parallel to the surface of the first electrode layer 12 facing the first liquid crystal layer 41.

When the first liquid crystal molecule 411 and the second liquid crystal molecule are both positive liquid crystal molecules, and the first dye molecule 412 and the second dye molecule 422 are negative dye molecules, in the first state, both the long axis direction of the first liquid crystal molecule 411 and the long axis direction of the second liquid crystal molecule 422 are perpendicular to the surface of the first electrode layer 12 facing the first liquid crystal layer 41, and at this time, both the long axis direction of the first dye molecule 412 and the long axis direction of the second dye molecule 422 are perpendicular to the surface of the first electrode layer 12 facing the first liquid crystal layer 41, so that the first dye molecule 412 and the second dye molecule 422 can transmit polarized light or polarized light components parallel to the long axis direction of the dye molecules, and then the first state is a light-transmitting state, and then the light modulation device 1000 is in a white state. In the second state, the long axis direction of the first dye molecules 412 and the long axis direction of the second dye molecules 422 are both parallel to the surface of the first electrode layer 12 facing the first liquid crystal layer 41, so that the first dye molecules 412 and the second dye molecules 422 can absorb polarized light or polarized light components perpendicular to the long axis direction of the dye molecules, the second state is a light blocking state, and the light modulation device 1000 is in a black state.

Through setting up first state into the printing opacity state, for example when light modulating device 1000 uses on aircraft or high-speed railway, make light modulating device can see through external environment light under the circumstances of all cutting off the power supply to two liquid crystal cells in light modulating device 1000, perhaps the inside light of aircraft or high-speed railway sees through, effectively improves the security performance, and can effectively reduce the loss. When the second state is set to the light blocking state, for example, when the external ambient light is strong, voltages may be applied to the first electrode layer 12, the second electrode layer 22, and the third electrode layer 32, respectively, so as to block the external light from entering the interior of the aircraft or the high-speed rail, thereby improving the comfort of passengers in the interior of the aircraft or the high-speed rail. Meanwhile, the light modulation device 1000 is in the second state, so that the light can be prevented from being transmitted, and an effective peeping prevention effect can be achieved.

Referring to fig. 6, fig. 6 is a cross-sectional view of a light modulation device provided by yet another example of fig. 1 taken along the direction a-a. in some embodiments, the second liquid Crystal layer 42 is a Polymer Network liquid Crystal (PN L liquid Crystal, L C) layer, when the second liquid Crystal cell is a PN L C cell, wherein the liquid Crystal molecules in the Polymer Network liquid Crystal layer are circular particles, the PN L C cell includes a positive PN L2C cell and a negative PN L C cell, in the positive PN L C cell, when no voltage is applied between the third electrode layer 32 and the fourth electrode layer 23, the positive PN L C cell is in a dark state (foggy state), in the case of a predetermined voltage applied between the third electrode layer 32 and the fourth electrode layer 23, incident light can pass through the second liquid Crystal layer 42 of the positive PN 856C cell, so that the PN L C cell is in a negative state L C cell as opposed to the positive PN 34C cell, i.e., when a predetermined voltage is applied between the third electrode layer 32 and the fourth electrode layer 23, the positive PN 5832 and the negative PN 5832C cell can be set to have a reduced effect when the PN is applied between the positive PN 48 and the positive PN L, when the positive PN 3C cell, the negative PN is not applied between the positive PN.

In order to be able to change the light transmittance of the light modulation device 1000, the second liquid crystal layer 42 may also be a polymer dispersed liquid crystal (PD L C) layer, when the second liquid crystal cell is a PD L C cell, the PD L C cell is able to achieve a photo-electric response by dielectric anisotropy of liquid crystal molecules by uniformly dispersing the liquid crystal molecules in a polymer network of the polymer, the PD L C cell includes a forward PD 8652C cell and a reverse PD L C cell, for the forward PD L C cell, the forward PD L C cell assumes a light scattering state (dark state) when a predetermined voltage is applied between the third electrode layer 32 and the fourth electrode layer 23, the forward PD L C cell is transparent when a predetermined voltage is not applied between the third electrode layer 32 and the fourth electrode layer 6323, for the reverse PD L C cell, the PD L C cell assumes a light scattering state (dark state) when a predetermined voltage is not applied between the third electrode layer 32 and the fourth electrode layer 23, the PD L C cell assumes a light scattering state when a predetermined voltage is applied between the third electrode layer 32 and the fourth electrode layer 23, the PD L C cell may be set to a light transmittance change by a predetermined voltage, when the PD 73742 is applied between the third liquid crystal layer 32 and the fourth liquid crystal layer 73742, the second liquid crystal layer 73742, the third liquid crystal cell may be set to achieve a light modulation effect when the predetermined voltage is applied between the third liquid crystal layer 73742.

Since the modulation principle of light is similar when the second liquid crystal cell is a PN L C cell and a PD L C cell, the second liquid crystal cell is a PN L C cell for example.

Referring to fig. 7, fig. 7 is a graph comparing transmittance and driving voltage of three liquid crystal cells, fig. 7 shows a relationship between transmittance and driving voltage of a PN L C cell, a GH L C cell, and a light modulation device using a combination of a PN L C cell and a GH L C cell, and fig. 7 shows that the transmittance of the PN L C cell is higher than that of the GH L C cell, the PN L C cell has a large haze adjustable range but a small brightness adjustable range, and the GH L C cell has a large brightness adjustable range and can realize gray scale but not large haze adjustable range, and when the light modulation device 1000 includes two liquid crystal cells stacked, a plurality of modes of the light modulation device 1000 can be realized by using a combination of a PN L C cell and a GH L C cell.

Specifically, combining the respective characteristics of the PN L C box and the GH L C box, when the light modulation device 1000 includes the PN L C box and the GH L C box, the independent adjustment of the range of both brightness and haze can be implemented in combination with more dimming modes, for example, the PN L C box can be in the high haze mode, the GH L C box can be in the low transmittance mode, so that the light modulation device is in the high haze and low transmittance mode, in which the privacy of the user can be well protected and most of light can be effectively shielded.

In order to encapsulate the first liquid crystal layer 41 and the second liquid crystal layer 42, an encapsulation adhesive 60 is further disposed between the first substrate 10 and the second substrate 20 and between the second substrate 20 and the third substrate 30, the encapsulation adhesive 60 between the first substrate 10 and the second substrate 20 is located on the outer peripheral side of the first liquid crystal layer 41, and the encapsulation adhesive 60 between the second substrate 20 and the third substrate 30 is located on the outer peripheral side of the second liquid crystal layer 42.

In summary, according to the light modulation device 1000 of the embodiment of the invention, the light modulation device 1000 includes the first substrate 10, the second substrate 20, and the third substrate 30, the first liquid crystal layer 41 is sandwiched between the first substrate 10 and the second substrate 20 to form a first liquid crystal cell, the second liquid crystal layer 42 is sandwiched between the second substrate 20 and the third substrate 30 to form a second liquid crystal cell, and the first liquid crystal cell and the second liquid crystal cell can share the second substrate 20.

Meanwhile, the second substrate 20 includes a second substrate 21 and a second electrode layer 22 connected to the second substrate 21, where the second electrode layer 22 is a surface electrode, and compared to a plurality of electrode blocks arranged at intervals, the surface electrode can block electric field signals in two liquid crystal cells from affecting electric field signals in adjacent liquid crystal cells through gaps between the electrode blocks, so that the surface electrode is provided with the surface electrode on the second substrate 20, which can effectively prevent mutual interference of electric field signals in the first liquid crystal cell and the second liquid crystal cell, improve stability of the optical modulation device 1000, and can input a common electric signal on the surface electrode, and the common electric signal electrode layer is manufactured into the surface electrode, which can simplify a manufacturing process and save cost.

Further, the first substrate 11 includes the first connection portion 111, the first circuit board 51 is at least partially overlapped and connected with the first connection portion 111, because the first connection portion 111 is disposed on the first substrate 11, when the first connection portion 111 is bound with the first circuit board 51, the first connection portion 111 and the first substrate 11 are respectively contacted with the binding platform, so that the first connection portion 111 can receive the first substrate 11 or the stable supporting function of the binding platform, and it is effectively prevented that the unreasonable arrangement position of the first connection portion 111 causes the first circuit board 51 and the first connection portion 111 to receive the external force effect in the binding process to damage the light modulation device 1000.

On the other hand, an embodiment of the invention further provides a method for manufacturing an optical modulation device, please refer to fig. 8 to 17 together, fig. 8 is a schematic flow chart of the method for manufacturing an optical modulation device according to an embodiment of the invention, and fig. 9 to 17 are schematic structural diagrams corresponding to the method for manufacturing an optical modulation device according to an embodiment of the invention. The preparation method of the light modulation device provided by the embodiment of the invention comprises the following steps:

s110, forming a first substrate mother board 10m includes forming a first electrode layer 12m on the first substrate mother board 11 m.

Referring to fig. 9, in step S110, the first substrate mother substrate 11m may be a transparent glass substrate, the first electrode layer 12 may be Indium Tin Oxides (ITO), and the first electrode layer 12m may be formed on the first substrate mother substrate 11m by using a mask. When the first electrode layer 12m includes a plurality of electrode blocks distributed in an array, the entire electrode may be formed on the first substrate mother substrate 11m, and then the entire electrode may be patterned, for example, the entire electrode may be exposed, etched, and the like to form a plurality of electrode blocks distributed in an array. In some embodiments, forming the first substrate mother sheet 10m further includes forming a first alignment layer 13m at the first electrode layer 12m facing away from the first substrate mother sheet 11 m.

S120, forming a second substrate mother board 20m, including forming a second electrode layer 22m on the second substrate mother board 21 m.

Referring to fig. 10, in step S120, the second substrate mother substrate 21m may be a transparent glass substrate, the second electrode layer 22m may be Indium Tin Oxides (ITO), the second electrode layer 22m may be formed on the first substrate mother substrate 11m by using a mask, and when the second electrode layer 22m is a front electrode layer, a film may be formed on the entire surface of the second substrate mother substrate 21 m. In some embodiments, forming the second base mother substrate 20m further includes forming a second alignment layer 24m at the second electrode layer 22m facing away from the second substrate mother substrate 21 m.

S130, a plurality of first liquid crystal layers 41 are interposed between the first substrate mother board 10m and the second substrate mother board 20 m.

In order to improve the manufacturing process of the optical modulation device 1000, a large mother board of the optical modulation device may be formed first, and then the mother board of the optical modulation device may be cut to form a plurality of optical modulation devices 1000, so in step S130, a plurality of first liquid crystal layers 41 disposed at intervals may be interposed between the first substrate mother board 10m and the second substrate mother board 20m, and by disposing a plurality of first liquid crystal layers 41 disposed at intervals, it is convenient to dispose an encapsulation adhesive on the outer peripheries of the plurality of first liquid crystal layers 41. In specific implementation, a plurality of first liquid crystal layers 41 may be formed by using a crystal filling process, the first substrate mother board 10m and the second substrate mother board 20m may be disposed opposite to each other to form a cell, and then the first liquid crystal layer 41 is filled between the first substrate mother board 10m and the second substrate mother board 20m to form a first liquid crystal cell. Alternatively, the first liquid crystal layer 41 may be formed using a liquid crystal dropping process (ODF), and specifically, as shown in fig. 11 and 12, the first liquid crystal layer 41 may be disposed on the first substrate mother substrate 10m, and then the second substrate mother substrate 20m may be disposed on the first liquid crystal layer 41 such that the first liquid crystal layer 41 is disposed between the first substrate mother substrate 10m and the second substrate mother substrate 20 m.

S140, a third substrate mother board 30m is formed, and a third electrode layer 32m is formed on the third substrate mother board 31 m.

As shown in fig. 13, step S140 is similar to step S110 and step S120, and is not repeated. In some embodiments, forming the third substrate mother sheet 30m further includes forming a third alignment layer 33m on the third electrode layer 32m facing away from the third substrate mother sheet 31 m.

S150, a plurality of second liquid crystal layers 42 are interposed between the second substrate mother board 20m and the third substrate mother board 30 m.

As shown in fig. 15 and 16, in step S150, a plurality of second liquid crystal layers 42 disposed at intervals may be interposed between the second substrate mother substrate 20m and the third substrate mother substrate 30m using a liquid crystal filling process or an ODF process.

And S160, cutting the first substrate mother board 10m, the second substrate mother board 20m and the third substrate mother board 30m to form a plurality of light modulation assemblies.

The light modulation assembly comprises a first substrate 10, a second substrate 20 and a third substrate 30 which are sequentially arranged at intervals, wherein the first substrate 10 comprises a first substrate 11 and a first electrode layer 12 connected with the first substrate 11, the first substrate 11 comprises a first connecting portion 111, the second substrate 20 comprises a second substrate 21 and a second electrode layer 22 connected with the second substrate 21, the second electrode layer 22 is a surface electrode, the third substrate 30 comprises a third substrate 31 and a third electrode layer 32 connected with the third substrate 31, and an orthographic projection of the first connecting portion 111 in the thickness direction of the light modulation device 1000 is located on the outer periphery side of an orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000.

As shown in fig. 17, in step S160, when the first substrate mother board 10m, the second substrate mother board 20m, and the third substrate mother board 30m are cut, the first substrate mother board 10m, the second substrate mother board 20m, and the third substrate mother board 30m may be cut along a first predetermined trajectory to form a plurality of light modulation structures, and then the individual light modulation structures may be cut and shaped to form a light modulation assembly. Alternatively, at least portions of the first substrate mother substrate 10m, the second substrate mother substrate 20m, and the third substrate mother substrate 30m may be cut a plurality of times in a second predetermined trajectory to form a plurality of light modulation components. The cutting mode of each substrate motherboard can be set according to the requirements of users, as long as the light modulation component with the structure can be cut and formed.

S170, overlapping and connecting the first wiring board 51 with at least a portion of the first connection portion 111 of the light modulation assembly to form the light modulation device 1000.

Since the orthographic projection of the first connecting portion 111 in the thickness direction of the light modulation device 1000 is located on the outer periphery side of the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, at this time, the orthographic projection of the first connecting portion 111 in the thickness direction of the light modulation device 1000 does not overlap with the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, so that the first connecting portion 111 is convexly arranged on the first liquid crystal cell, the connection of the first circuit board 51 and the first connecting portion 111 is facilitated, and the electric signals transmitted from the first circuit board 51 to the first electrode layer 12 are facilitated by connecting the first circuit board 51 and the first connecting.

The method for manufacturing the light modulation device according to the embodiment of the invention can form the light modulation device 1000 according to any one of the embodiments, effectively reduce the thickness of the light modulation device 1000, and effectively improve the light transmittance of the light modulation device 1000. Meanwhile, the surface electrode is arranged on the second substrate 20, so that mutual interference of electric field signals in the first liquid crystal box and the second liquid crystal box can be effectively prevented, the stability of the light modulation device 1000 is improved, a public electric signal can be input on the surface electrode, the surface electrode is manufactured by the public electric signal electrode, the manufacturing process can be simplified, the cost is saved, and the situation that the first circuit board 51 and the first connecting part 111 are damaged due to the fact that the first circuit board and the first connecting part 111 are unreasonably arranged in the first connecting part 111 is effectively prevented from being subjected to external force in the binding process.

Referring to fig. 14, in some embodiments, the second electrode layer 22 is located on a surface of the second substrate 21 facing the first liquid crystal layer 41, the second substrate 20 further includes a fourth electrode layer 23, the fourth electrode layer 23 is located on a surface of the second substrate 21 facing the second liquid crystal layer 42, and after step S130, the method further includes forming a fourth electrode layer 23m on a side of the second substrate mother board 21m facing away from the first liquid crystal layer and forming a fourth alignment layer 25m on a side of the fourth electrode layer 23m facing away from the first substrate mother board 21 m.

In some embodiments, the orthographic projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 is located on the outer peripheral side of the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, the second substrate 21 includes the second connection portion 211, the orthographic projection of the second connection portion 211 in the thickness direction of the light modulation device 1000 is located on the outer peripheral side of the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, the second connection portion 211 and the first connection portion 111 are located on the same side of the second substrate 21 in the planar direction along the second substrate 21, and the method of manufacturing the light modulation device further includes: the second wiring board 52 is overlapped and connected with at least a part of the second connection portion 211.

In some embodiments, the orthographic projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 is located on the outer peripheral side of the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000, the third substrate 31 includes a third connection portion 311, the orthographic projection of the third connection portion 311 in the thickness direction of the light modulation device 1000 is located on the outer peripheral side of the orthographic projection of the second liquid crystal layer 42 in the thickness direction of the light modulation device 1000, the third connection portion 311 and the first connection portion 111 are respectively located on opposite sides of the second substrate 21 in the planar direction along the second substrate 21, and the method of manufacturing the light modulation device further includes:

the light modulation member is turned over and the third wiring board 53 is at least partially overlapped and connected with the third connection portion 311.

In a specific implementation, after the first circuit board 51 is at least partially overlapped and connected with the first connection portion 111, the light modulation component is turned over by 180 degrees, and then the third circuit board 53 is at least partially overlapped and connected with the third connection portion 311. Through the arrangement, the first substrate 11 and the third substrate 31 respectively play a good role in supporting and protecting the bonding process of the circuit board and the connecting part.

Referring to fig. 18, fig. 18 is a schematic flow chart of a method for manufacturing a light modulation device according to another embodiment of the invention. The embodiment of the invention also provides a preparation method of the light modulation device, which comprises the following steps:

s210, forming a first substrate 10, forming a first electrode layer 12 on a first substrate 11, wherein the first substrate 11 includes a first connection portion 111;

in step S210, the orthographic projection of the first connection portion 111 in the thickness direction of the light modulation device 1000 is located on the outer peripheral side of the orthographic projection of the first liquid crystal layer 41 in the thickness direction of the light modulation device 1000.

S220, forming a second substrate 20, and forming a second electrode layer 22 on the second substrate 21, where the second electrode layer 22 is a surface electrode;

s230, sandwiching a first liquid crystal layer 41 between the first substrate 10 and the second substrate 20;

s240, forming a third substrate 30, and forming a third electrode layer 32 on the third substrate 31;

s250, interposing the second liquid crystal layer 42 between the second substrate 20 and the third substrate 30;

s260, overlapping and connecting the first wiring board 51 with at least a portion of the first connection portion 111 to form the light modulation device 1000.

The method for manufacturing a light modulation device according to the embodiment of the present invention can be used to manufacture a single light modulation device, and the light modulation device 1000 according to any of the embodiments can be formed according to the method for manufacturing a light modulation device according to the embodiment of the present invention, so that the beneficial effects of the light modulation device 1000 according to the embodiment of the present invention are similar to those of the light modulation device 1000 according to any of the embodiments, and are not repeated.

In accordance with the above embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A light modulation device, comprising:

the first substrate comprises a first substrate and a first electrode layer connected with the first substrate, the first substrate comprises a first connecting part, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, the second electrode layer is a surface electrode, and the third substrate comprises a third substrate and a third electrode layer connected with the third substrate;

the first liquid crystal layer is clamped between the first substrate and the second substrate, the second liquid crystal layer is clamped between the second substrate and the third substrate, the second electrode layer and the first electrode layer are used for driving liquid crystal molecules in the first liquid crystal layer to deflect, and/or the second electrode layer and the third electrode layer are used for driving liquid crystal molecules in the second liquid crystal layer to deflect;

a first wiring board at least partially overlapping and connected with the first connection portion of the first substrate.

2. The light modulation device according to claim 1, wherein an orthogonal projection of the first connection portion in a thickness direction of the light modulation device is located on an outer peripheral side of an orthogonal projection of the first liquid crystal layer in the thickness direction of the light modulation device,

the second substrate includes a second connection portion located on an outer peripheral side of an orthographic projection of the second liquid crystal layer in a thickness direction of the light modulation device in an orthographic projection of the second liquid crystal layer in the thickness direction of the light modulation device, the second connection portion and the first connection portion being located on the same side of the second substrate in a planar direction of the second substrate, the light modulation device further includes:

a second wiring board overlapping and connected with at least a part of the second connection portion.

3. The light modulation device according to claim 1, wherein an orthogonal projection of the first connection portion in a thickness direction of the light modulation device is located on an outer peripheral side of an orthogonal projection of the first liquid crystal layer in the thickness direction of the light modulation device,

the third substrate includes a third connection portion located on an outer peripheral side of an orthographic projection of the second liquid crystal layer in a thickness direction of the light modulation device in an orthographic projection of the second liquid crystal layer in the thickness direction of the light modulation device, the third connection portion and the first connection portion being respectively located on different sides of the second substrate in a planar direction of the second substrate, and the light modulation device further includes:

and a third circuit board at least partially overlapping and connected to the third connection portion.

4. A light modulation device according to claim 3, wherein the third connection portion and the first connection portion are respectively located on opposite sides of the second substrate in a plane direction along the second substrate, the first connection portion has a first connection face to which the first wiring board is connected, the third connection portion has a second connection face to which the third wiring board is connected, and the first connection face and the second connection face are opposed in orientation.

5. The light modulation device according to claim 1, wherein the second electrode layer and the first electrode layer are configured to drive liquid crystal molecules in the first liquid crystal layer to deflect, and the second electrode layer and the third electrode layer are configured to drive liquid crystal molecules in the second liquid crystal layer to deflect,

the first electrode layer is a surface electrode, or the first electrode layer comprises a plurality of electrode blocks which are arranged in an array;

the third electrode layer is a surface electrode, or the third electrode layer comprises a plurality of electrode blocks which are arranged in an array.

6. The light modulation device according to claim 1, wherein the second electrode layer is provided on a surface of the second substrate facing the first liquid crystal layer, the second substrate further comprises a fourth electrode layer provided on a surface of the second substrate facing the second liquid crystal layer,

the third electrode layer and the fourth electrode layer are both surface electrodes, or one of the third electrode layer and the fourth electrode layer is a surface electrode, and the other electrode layer comprises a plurality of electrode blocks arranged in an array.

7. The light modulation device according to claim 1, wherein the first liquid crystal layer is a first guest-host liquid crystal layer, the first guest-host liquid crystal layer includes first liquid crystal molecules and first dye molecules, and the first liquid crystal molecules and the first dye molecules are aligned in the same direction.

8. The light modulating device of claim 7, wherein the second liquid crystal layer is a second guest-host liquid crystal layer comprising second liquid crystal molecules and second dye molecules, the second liquid crystal molecules and the second dye molecules being in the same orientation,

the light modulation device has a first state in which the long axis direction of the first liquid crystal molecules and the long axis direction of the second liquid crystal molecules are parallel to each other, and a second state in which the long axis direction of the first liquid crystal molecules and the long axis direction of the second liquid crystal molecules are perpendicular to each other.

9. The light modulation device according to claim 8, wherein when no voltage is applied to each of the first electrode layer, the second electrode layer, and the third electrode layer, the light modulation device is in a first state in which both the long axis direction of the first liquid crystal molecules and the long axis direction of the second liquid crystal molecules are perpendicular to a surface of the first electrode layer facing the first liquid crystal layer,

when the first electrode layer, the second electrode layer and the third electrode layer are respectively applied with voltage, the light modulation device is in a second state, and the long axis direction of the first liquid crystal molecules and the long axis direction of the second liquid crystal molecules are parallel to the first electrode layer and face the surface of the first liquid crystal layer.

10. A light modulating device as defined in claim 9, wherein the first state is a light transmissive state and the second state is a light blocking state.

11. A light modulating device as claimed in any one of claims 1 to 7 wherein the second liquid crystal layer is a polymer network liquid crystal layer.

12. A method of making a light modulating device, comprising:

forming a first substrate motherboard, including forming a first electrode layer on a first substrate motherboard;

forming a second substrate motherboard including forming a second electrode layer on the second substrate motherboard;

a plurality of first liquid crystal layers which are arranged at intervals are clamped between the first substrate mother board and the second substrate mother board;

forming a third substrate mother board, and forming a third electrode layer on the third substrate mother board;

a plurality of second liquid crystal layers which are arranged at intervals are clamped between the second substrate mother board and the third substrate mother board;

cutting the first substrate mother board, the second substrate mother board and the third substrate mother board to form a plurality of light modulation assemblies, wherein each light modulation assembly comprises a first substrate, a second substrate and a third substrate which are sequentially arranged at intervals, the first substrate comprises a first substrate and a first electrode layer connected with the first substrate, the first substrate comprises a first connecting part, the second substrate comprises a second substrate and a second electrode layer connected with the second substrate, the second electrode layer is a surface electrode, the third substrate comprises a third substrate and a third electrode layer connected with the third substrate, and the orthographic projection of the first connecting part in the thickness direction of the light modulation device is located on the outer periphery of the orthographic projection liquid crystal layer of the first connecting part in the thickness direction of the light modulation device;

and overlapping and connecting the first circuit board and at least part of the first connecting part of the light modulation component to form a light modulation device.

13. The method of manufacturing a light modulation device according to claim 12, wherein the second substrate includes a second connection portion, an orthogonal projection of the second connection portion in a thickness direction of the light modulation device is located on an outer peripheral side of an orthogonal projection of the second liquid crystal layer in the thickness direction of the light modulation device, and the second connection portion and the first connection portion are located on a same side of the second substrate in a planar direction of the second substrate, the method further comprising:

and overlapping and connecting the second circuit board and at least part of the second connecting part.

14. The method of manufacturing a light modulation device according to claim 12, wherein the third substrate includes a third connection portion, an orthogonal projection of the third connection portion in a thickness direction of the light modulation device is located on an outer peripheral side of an orthogonal projection of the second liquid crystal layer in the thickness direction of the light modulation device, the third connection portion and the first connection portion are respectively located on opposite sides of the second substrate in a planar direction of the second substrate, the method further comprising:

and turning over the light modulation assembly and at least partially overlapping and connecting a third circuit board and the third connecting part.

15. A method of making a light modulating device, comprising:

forming a first substrate, forming a first electrode layer on a first substrate, the first substrate including a first connection portion, an orthographic projection of the first connection portion in a thickness direction of the light modulation device being located on an outer peripheral side of an orthographic projection of a first liquid crystal layer in the thickness direction of the light modulation device;

forming a second substrate, and forming a second electrode layer on the second substrate, wherein the second electrode layer is a surface electrode;

a first liquid crystal layer is sandwiched between the first substrate and the second substrate;

forming a third substrate, and forming a third electrode layer on the third substrate;

a second liquid crystal layer is sandwiched between the second substrate and the third substrate;

the first wiring board is overlapped and connected with at least a part of the first connection portion to form a light modulation device.