CN118502166A - Method for manufacturing liquid crystal cell, and light adjusting film - Google Patents

Abstract

The present disclosure provides a method of manufacturing a liquid crystal cell, and a light adjusting film. The manufacturing method of the liquid crystal box comprises the following steps: providing a liquid crystal empty box, wherein the liquid crystal empty box comprises an upper substrate and a lower substrate, the upper substrate and the lower substrate are arranged in a box-to-box manner through frame sealing glue, and the upper substrate, the lower substrate and the frame sealing glue are enclosed to form a containing space for containing liquid crystal; wherein, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed on the frame sealing adhesive; injecting liquid crystal into the accommodating space through at least one injection port, and exhausting gas in the accommodating space through at least one exhaust port; after the liquid crystal fills the accommodating space, at least one injection port and at least one exhaust port are blocked. When the upper substrate and the lower substrate are manufactured into the liquid crystal box in a roll-to-roll manner, liquid crystal is prevented from overflowing the frame sealing glue, and the bad risk of product bubbles is avoided.

Description

Method for manufacturing liquid crystal cell, and light adjusting film

Technical Field

The disclosure relates to the technical field of dimming films, and in particular relates to a manufacturing method of a liquid crystal box, the liquid crystal box and a dimming film.

Background

The light-adjusting film is a novel electronic light-controlling product, and can change the haze or light transmittance of the film under the electrified state, and the haze or light transmittance of the light-adjusting film can be controlled by a driving power supply. The light-adjusting film is widely applied to the technical field of controllable sun shading, indoor partition, automobile doors and windows and the like, for example, a light-adjusting film is adopted on an automobile awning, so that the lighting requirement can be met, and the light injection can be reduced when the lighting requirement is met.

At present, a common dimming film is a liquid crystal dimming film, when two ends of the dimming film are powered off, macromolecule liquid crystal materials between the dimming film and the dimming film are arranged in disorder, so that light cannot penetrate through the film, and the visual effect is in a fog opaque state; when the two ends of the dimming film are electrified, the high polymer liquid crystal materials are orderly arranged under the action of an electric field, so that light can penetrate through the film, and the visual effect at the moment is a transparent state which can be seen through.

However, in the existing liquid crystal dimming film manufacturing process, because the liquid crystal is fluid, the viscosity is low and easy to flow, the liquid crystal can be extruded out of the frame sealing glue when the upper substrate and the lower substrate are compounded in a rolling compounding mode, so that the periphery of the frame sealing glue can overflow the liquid crystal, the frame sealing glue is polluted by the liquid crystal, the packaging effect is poor, and meanwhile, the liquid crystal is wasted.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The invention aims to provide a manufacturing method of a liquid crystal box, the liquid crystal box and a dimming film, which prevent liquid crystal from overflowing a frame sealing adhesive and avoid bad risks of bubbles of products.

According to an aspect of the present disclosure, there is provided a method of manufacturing a liquid crystal cell, the method comprising:

Providing a liquid crystal empty box, wherein the liquid crystal empty box comprises an upper substrate and a lower substrate, the upper substrate and the lower substrate are arranged in a box-to-box manner through frame sealing glue, and the upper substrate, the lower substrate and the frame sealing glue are enclosed to form an accommodating space for accommodating liquid crystal; wherein, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed on the frame sealing adhesive;

Injecting liquid crystal into the accommodating space through the at least one injection port, and discharging gas in the accommodating space through the at least one exhaust port;

and after the liquid crystal fills the accommodating space, the at least one injection port and the at least one exhaust port are blocked.

In an exemplary embodiment of the present disclosure, injecting the liquid crystal into the receiving space through the at least one injection port includes:

Providing an injection assembly, connecting the injection assembly with the at least one injection port, and injecting liquid crystal into the accommodating space through the injection assembly.

In an exemplary embodiment of the present disclosure, the liquid crystal cell further includes:

A first conduit disposed over the injection port; the injection assembly is connected with the first conduit, and liquid crystal is injected into the accommodating space through the first conduit.

In one exemplary embodiment of the present disclosure, the injection assembly includes a first vacuum pump, a first filter, a first solenoid valve, a liquid crystal cell, a second solenoid valve, a plunger pump, a third solenoid valve, and a first connector connected in sequence;

Wherein injecting liquid crystal into the accommodation space through the injection assembly includes: closing the second electromagnetic valve, opening the first vacuum pump, and defoaming liquid crystal through the liquid crystal tank; then, opening the second electromagnetic valve and a rotary valve of the plunger pump, and sucking liquid crystal into the plunger pump by lifting a plunger of the plunger pump; after liquid crystal is sucked into the plunger pump, the rotary valve of the plunger pump and the second electromagnetic valve are closed, then the third electromagnetic valve is opened, the liquid crystal is injected into the accommodating space through the descending of the plunger pump, and the electromagnetic valve is closed after the accommodating space is filled with the liquid crystal.

In an exemplary embodiment of the present disclosure, the injection assembly further comprises:

A heater configured to heat the liquid crystal cell.

In an exemplary embodiment of the present disclosure, exhausting the gas in the accommodating space through the at least one exhaust port includes:

Providing an air extraction assembly, and connecting the air extraction assembly with the at least one air outlet;

Closing the at least one injection port by an injection assembly;

After closing the at least one injection port, a vacuum is drawn on the receiving space through the pumping assembly.

In an exemplary embodiment of the present disclosure, the liquid crystal cell further includes:

The second conduit is arranged on the exhaust port; the air extraction assembly is connected with the second conduit, and the accommodating space is vacuumized through the second conduit.

In an exemplary embodiment of the disclosure, the air extraction assembly includes a second vacuum pump, a second filter, a fourth electromagnetic valve and a second connector which are sequentially connected, wherein a pressure gauge is arranged on a pipeline connected with the fourth electromagnetic valve and the second connector;

wherein, through the bleed subassembly to the accommodation space evacuation includes: and opening the fourth electromagnetic valve, vacuumizing the accommodating space through the second vacuum pump, and closing the fourth electromagnetic valve after the accommodating space reaches a preset vacuum degree.

According to another aspect of the present disclosure, there is provided a liquid crystal cell formed by the above-described manufacturing method.

According to still another aspect of the present disclosure, there is provided a dimming film including the above-described liquid crystal cell.

According to the manufacturing method of the liquid crystal box, the upper substrate and the lower substrate can be arranged in a box-to-box manner through the box sealing glue by a roll-to-roll production line, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed in the box sealing glue, liquid crystal is poured into the accommodating space through the at least one injection port, and gas in the accommodating space is exhausted through the at least one exhaust port, so that the problems that the liquid crystal is extruded out of the box sealing glue when the upper substrate and the lower substrate are subjected to roll-in lamination and the liquid crystal overflows the box sealing glue, the box sealing glue is polluted by the liquid crystal, so that the packaging effect is poor, meanwhile, the waste of the liquid crystal is caused, and the risk of bad bubbles exists in the flexible liquid crystal box can be solved; after the liquid crystal is filled in the accommodating space, at least one injection port and at least one exhaust port are blocked, so that the time for injecting the liquid crystal is shortened, the productivity is improved, the mass production is realized, and the liquid crystal filling device can be applied to manufacturing processes for producing large-size products.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

FIG. 1 is a schematic illustration of a flexible dimming film structure;

FIG. 2 is a schematic view of warpage of a bonded substrate;

FIG. 3 is a schematic illustration of a liquid crystal contamination seal after roll-to-roll compounding;

FIG. 4 is a schematic diagram of a flexible liquid crystal cell in the related art;

FIG. 5 is a schematic diagram of a vacuum injection seeding process in the related art;

FIG. 6 is a flow chart of a method of manufacturing a liquid crystal cell provided by one embodiment of the present disclosure;

FIG. 7 is a schematic illustration of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 8 is a schematic diagram of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 9 is a schematic diagram of a liquid crystal cell provided by one embodiment of the present disclosure;

FIG. 10 is a schematic view of an injection assembly and a vent assembly provided by one embodiment of the present disclosure;

FIG. 11 is a schematic illustration of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 12 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 13 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 14 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 15 is a schematic view of an injection assembly provided by an embodiment of the present disclosure;

FIG. 16 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 17 is a schematic diagram of an injection port and an exhaust port of a liquid crystal blank cell provided by an embodiment of the present disclosure;

FIG. 18 is a schematic view of an injection assembly and a vent assembly provided by one embodiment of the present disclosure;

FIG. 19 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 20 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 21 is a schematic view of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

FIG. 22 is a schematic illustration of an injection port and an exhaust port of a liquid crystal blank cell provided by one embodiment of the present disclosure;

Fig. 23 is a schematic view of an injection assembly provided by an embodiment of the present disclosure.

Reference numerals illustrate:

10. A liquid crystal; 100. overflowing the liquid crystal; 11. an upper substrate; 111. an upper substrate film; 112. an upper substrate IOT electrode layer; 113. an upper substrate alignment layer; 12. a lower substrate; 121. a lower substrate film; 122. a lower substrate electrode layer; 123. an in-box support unit; 124. a lower substrate alignment layer; 125. sealing the frame glue; 13. an equipment machine; 14. a glass substrate; 15. an adhesive film; 16. an ITO thin film;

20. A liquid crystal empty box; 21. an upper substrate; 211. a first flexible film; 212. a first IOT electrode layer; 213. a first alignment film; 22. a lower substrate; 221. a second flexible film; 222. a second IOT electrode layer; 223. a supporting unit; 224. a second alignment film; 225. sealing the frame glue; 2251. an injection port; 2252. an exhaust port; 2253. a first conduit; 2254. a second conduit; 2255. UV glue; 23. an accommodation space;

31. A first vacuum pump; 32. a first filter; 33. a first solenoid valve 34, a liquid crystal cell; 35. a second electromagnetic valve; 36. a plunger pump 37, a third solenoid valve; 38. a first connector;

41. a second vacuum pump; 42. a second filter; 43. a fourth electromagnetic valve; 44. a pressure gauge; 45. and a second connector.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first" and "second" are used merely as labels, and do not limit the number of their objects.

As shown in fig. 1, the structure of the flexible dye liquid crystal dimming film includes an upper substrate 11 and a lower substrate 12, the upper substrate 11 has an upper substrate film 111, an upper substrate ITO electrode layer 112 and an upper substrate alignment layer 113 in this order, and the lower substrate 12 has a lower substrate film 121, a lower substrate ITO electrode layer 122, an in-cell supporting unit 123 and a lower substrate alignment layer 124 in this order. Wherein, the support unit in the box is BS/PS, which is positioned on the lower substrate 12, the dye liquid crystal 10 is filled in the box, and the peripheries of the upper substrate 11 and the lower substrate 12 are sealed by frame sealing glue.

The inventor finds that the flexible dimming film is manufactured by an LCD production line, a glass substrate is used as a carrier plate, as shown in FIG. 2, a glass substrate 14 is arranged on a machine table 13, and an ITO film 16 is attached to the glass substrate 14 through a glue film 15; because of the great difference in thermal properties between the ITO film 16 and the glass substrate 14, the glass substrate 14 will be bonded to warp after the high temperature process, and thus the glass substrate 14 cannot be laminated, so that the ITO film 16 has a size of about one half of the glass substrate 14 (maximum 700mm×1200mm, and the glass substrate 14 is 1100mm×1300 mm), and smooth lamination can be ensured, thereby limiting the size of the flexible product.

The roll-to-roll production line is more suitable for flexible dimming films, has a width of more than 1.8 meters and can correspond to large-size products. However, the traditional roll-to-roll compounding equipment is compounding under normal pressure, partial air can be dissolved in dye liquid crystal, the dye liquid crystal is fluid, and the viscosity is low and the dye liquid crystal is easy to flow. As shown in fig. 3, when the upper substrate 11 and the lower substrate 12 are compounded, the liquid crystal 10 is extruded out of the frame sealing glue by adopting the roll-to-roll compounding method of the roll-to-roll compounding equipment 18, the liquid crystal 10 can overflow the frame sealing glue, so that the periphery of the frame sealing glue 125 can overflow the liquid crystal 100, and the frame sealing glue 125 is polluted by the liquid crystal 10, so that the packaging effect is poor and the liquid crystal 10 is wasted. The normal pressure compounding and frame sealing glue is polluted, so that the risk of bad bubbles exists in the flexible liquid crystal box.

Embodiments of the present disclosure provide a method of manufacturing a liquid crystal cell, as shown in fig. 6, the method including:

step S100, providing a liquid crystal empty box, wherein the liquid crystal empty box comprises an upper substrate and a lower substrate, the upper substrate and the lower substrate are arranged in a box-to-box manner through frame sealing glue, and the upper substrate, the lower substrate and the frame sealing glue are enclosed to form an accommodating space for accommodating liquid crystal; wherein, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed on the frame sealing adhesive;

Step 200, injecting liquid crystal into the accommodating space through at least one injection port, and exhausting gas in the accommodating space through at least one exhaust port;

And step S300, after the accommodating space is filled with the liquid crystal, at least one injection port and at least one exhaust port are blocked.

According to the manufacturing method of the liquid crystal box, the upper substrate and the lower substrate can be arranged in a box-to-box manner through the box sealing glue by a roll-to-roll production line, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed in the box sealing glue, liquid crystal is poured into the accommodating space through the at least one injection port, and gas in the accommodating space is exhausted through the at least one exhaust port, so that the problems that the liquid crystal is extruded out of the box sealing glue when the upper substrate and the lower substrate are subjected to roll-in lamination and the liquid crystal overflows the box sealing glue, the box sealing glue is polluted by the liquid crystal, so that the packaging effect is poor, meanwhile, the waste of the liquid crystal is caused, and the risk of bad bubbles exists in the flexible liquid crystal box can be solved; after the liquid crystal is filled in the accommodating space, at least one injection port and at least one exhaust port are blocked, so that the time for injecting the liquid crystal is shortened, the productivity is improved, the mass production performance is realized, and the liquid crystal filling device can be applied to manufacturing processes for producing large-size products (more than 18 inches).

Next, each step of the method for manufacturing a liquid crystal cell provided in the present disclosure will be described in detail.

In step S100, a liquid crystal empty box is provided, wherein the liquid crystal empty box comprises an upper substrate and a lower substrate, the upper substrate and the lower substrate are arranged in a box-to-box manner through frame sealing glue, and the upper substrate, the lower substrate and the frame sealing glue are enclosed to form a containing space for containing liquid crystal; wherein, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed on the frame sealing adhesive.

Specifically, as shown in fig. 7, the upper substrate 21 of the liquid crystal cell 20 includes a first flexible film 211, a first ITO electrode layer 212, a first alignment film 213, and a support unit (PS) 223, which are sequentially stacked. After the first ITO electrode layer 212 is formed on the first flexible film 211, the first flexible film 211 provided with the first ITO electrode layer 212 is then fed into the apparatus in a roll form, continuously produced, a plurality of PS are formed on a side of the first ITO electrode layer 212 facing away from the first flexible film 211, then a first alignment film 213 is formed on a region of the ITO electrode layer facing away from the first flexible film 211 where PS is not provided, then a frame sealing compound 225 is formed on a region of the first alignment film 213 of the lower substrate 22 facing away from the first ITO electrode layer 212, and a region surrounded by the frame sealing compound 225 is used for filling liquid crystal.

In order to align the liquid crystal molecules in a specific rotation direction, an alignment film is required to be formed on the inner sides of the thin film transistor array substrate and the color filter substrate, and the alignment film can be used to limit the alignment state of the liquid crystal molecules; the alignment film may be produced by spraying PI (Polyimide) solution containing a polymer compound on a substrate surface on which the alignment film is to be produced, curing the solution by heating, and rubbing or photo-alignment the solution with Rubbing to form a pretilt angle.

The PS is formed by, for example, screen printing or photolithography, micro-concave or slit coating PI, and the frame sealing glue 225 is formed by spraying or dispensing.

The lower substrate 22 includes a second flexible thin film 221, a second ITO electrode layer 222, and a second alignment film 224, which are sequentially stacked. After the second ITO electrode layer 222 is formed on the second flexible film 221, the second flexible film 221 provided with the second ITO electrode layer 222 is then fed into the apparatus in a roll form, continuously produced, and after the second ITO electrode layer 222 is formed on the second flexible film 221, a second alignment film 224 is then formed on a side of the second ITO electrode layer 222 facing away from the second flexible film 221.

Next, the upper substrate 21 and the lower substrate 22 are combined, the frame sealing adhesive 225 is cured, and then the plurality of liquid crystal cells 20 formed by the combined upper substrate 21 and lower substrate 22 are cut into individual liquid crystal cells 20.

Wherein the flexible liquid crystal cell 20 may be square, rectangular, circular or other shaped. The liquid crystal cell 20 has an injection port 2251 on one side and an exhaust port 2252 on the opposite side and corner.

The diameter of the injection port 2251 may be, for example, 1mm to 5mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, etc., and this disclosure is not limited thereto; of course, the diameter of the injection port 2251 may be less than 1mm or greater than 5mm, as the application is not limited in this regard.

The diameter of the exhaust port 2252 may be, for example, 1mm to 5mm, such as 1mm, 2mm, 3mm, 4mm, 5mm, etc., and this disclosure is not limited thereto; of course, the diameter of the exhaust port 2252 may be less than 1mm or greater than 5mm, as the application is not limited in this regard.

Wherein the number of the injection ports 2251 may be one or more, and the diameters when the plurality of injection ports 2251 are provided may be the same or different; the number of the plurality of the exhaust ports 2252 may be one or more, and the diameters of the plurality of the injection ports 2251 may be the same or different; the injection port 2251 and the exhaust port 2252 may be the same or different in shape and size, as the application is not limited in this regard.

In step S200, liquid crystal is injected into the accommodating space through at least one injection port, and gas in the accommodating space is discharged through at least one exhaust port.

In one embodiment, as shown in fig. 8 and 9, the frame sealing compound 225 of the liquid crystal blank 20 is formed to have one injection port 2251 and two exhaust ports 2252. The two exhaust ports 2252 may be located on opposite sides of the injection port 2251 or at the corners of opposite sides of the injection port 2251.

Specifically, as shown in fig. 10, an injection assembly is provided, the injection assembly is connected to the injection port 2251, and liquid crystal is injected into the accommodation space 23 through the injection assembly.

As shown in fig. 10, the injection assembly includes a first vacuum pump 31, a first filter 32, a first solenoid valve 33, a liquid crystal tank 34, a second solenoid valve 35, a plunger pump 36, a third solenoid valve 37, and a first connector 38, which are sequentially connected.

Specifically, as shown in fig. 10, a pumping assembly is provided that connects the pumping assembly with two exhaust ports 2252.

As shown in fig. 10, the air extraction assembly includes a second vacuum pump 41, a second filter 42, a fourth electromagnetic valve 43 and a second connector 45, which are sequentially connected, and a pressure gauge 44 is disposed on a pipeline connected with the fourth electromagnetic valve 43 and the second connector 45.

The liquid crystal injection process comprises the following steps: the first connector 38 is communicated with the injection port 2251, and the two second connectors 45 are respectively communicated with the two exhaust ports 2252; closing the second electromagnetic valve 35, opening the first electromagnetic valve 33, opening the first vacuum pump 31, and defoaming liquid crystal through the liquid crystal tank 34; when the first vacuum pump 31 is operated, foreign substances are prevented from entering the first vacuum pump 31 by the first filter 32; closing the first electromagnetic valve 33, the second electromagnetic valve 35 and the third electromagnetic valve 37, opening the fourth electromagnetic valve 43, vacuumizing the accommodating space 23 through the second vacuum pump 41, and closing the fourth electromagnetic valve 43 after the accommodating space 23 reaches a preset vacuum degree; when the second vacuum pump 41 is in operation, foreign matter is prevented from entering the first vacuum pump 31 by the second filter 42; wherein, the preset vacuum degree can be 1Pa, and the vacuum degree can be observed through the pressure gauge 44; of course, the preset vacuum degree may be 0.5Pa, 1.5Pa, 2Pa, etc., which is not limited in the present application. Then, the first solenoid valve 33 and the fourth solenoid valve 43 are closed, the second solenoid valve 35 and the rotary valve of the plunger pump 36 are opened, and the liquid crystal is sucked into the plunger pump 36 by the plunger rise of the plunger pump 36; after the liquid crystal is sucked into the plunger pump 36, the rotary valve of the plunger pump 36 and the second solenoid valve 35 are closed, then the third solenoid valve 37 is opened, the liquid crystal is injected into the accommodation space 23 by the plunger of the plunger pump 36 being lowered, and the solenoid valve is closed after the accommodation space 23 is filled with the liquid crystal. Wherein the injection amount of the liquid crystal can be precisely controlled by the plunger pump 36.

Wherein the first connector 38 and the injection port 2251 may be coupled together in a reed-type lock connection, for example, the first connector 38 may include a reed-type lock mechanism, the reed-type lock may be extended into the injection port 2251 by controlling the first connector 38 to effect connection to the injection port 2251, and the reed-type lock may be retracted from the injection port 2251 by controlling the first connector 38 to effect separation from the injection port 2251. Of course, those skilled in the art may also use other connection methods, and the disclosure is not limited thereto, and any solution involving up-conversion of the connection method of the first connector 38 and the injection port 2251 falls within the scope of the disclosure.

The second connector 45 is connected to the exhaust port 2252 in the same manner as the first connector 38 is connected to the injection port 2251. Of course, other connection methods may be adopted for the second connector 45 and the exhaust port 2252, which is not limited in this disclosure.

Wherein the injection assembly further comprises: the heater is configured to heat the liquid crystal tank 34, thereby heating the dye liquid crystal, reducing the viscosity thereof, shortening the liquid crystal injection time, and further improving the crystal injection efficiency.

The injection assembly includes a plurality of first connectors 38, and the air extraction assembly includes a plurality of fourth electromagnetic valves 43, so that the injection assembly and the air extraction assembly are simultaneously connected with a plurality of liquid crystal empty boxes 20, and simultaneously the liquid crystal empty boxes 20 are injected, thereby shortening the time of liquid crystal injection, improving the productivity and having mass productivity.

In one embodiment, as shown in fig. 11-14, the frame seal 225 of the liquid crystal blank 20 is formed with one injection port 2251 and two, three, or four exhaust ports 2252.

Specifically, as shown in fig. 15, an injection assembly is provided, the injection assembly is connected to the injection port 2251, and liquid crystal is injected into the accommodation space 23 through the injection assembly.

As shown in fig. 15, the injection assembly includes a first vacuum pump 31, a first filter 32, a first solenoid valve 33, a liquid crystal tank 34, a second solenoid valve 35, a plunger pump 36, a third solenoid valve 37, and a first connector 38, which are sequentially connected.

The liquid crystal injection process comprises the following steps: communicating the first connector 38 with the injection port 2251; closing the second electromagnetic valve 35, opening the first electromagnetic valve 33, opening the first vacuum pump 31, and defoaming liquid crystal through the liquid crystal tank 34; then, the first electromagnetic valve 33 is closed, the second electromagnetic valve 35 and the rotary valve of the plunger pump 36 are opened, and the liquid crystal is sucked into the plunger pump 36 by the plunger rise of the plunger pump 36; after the liquid crystal is sucked into the plunger pump 36, the rotary valve of the plunger pump 36 and the second solenoid valve 35 are closed, then the third solenoid valve 37 is opened, the liquid crystal is injected into the accommodation space 23 by the plunger of the plunger pump 36 being lowered, and the solenoid valve is closed after the accommodation space 23 is filled with the liquid crystal. Wherein the injection amount of the liquid crystal can be precisely controlled by the plunger pump 36.

Wherein the injection assembly further comprises: the heater is configured to heat the liquid crystal tank 34, thereby heating the dye liquid crystal, reducing the viscosity thereof, shortening the liquid crystal injection time, and further improving the crystal injection efficiency.

In one embodiment, as shown in fig. 16 and 17, the frame sealing glue 225 of the liquid crystal blank 20 is formed to have one injection port 2251 and two exhaust ports 2252, wherein the injection port 2251 is provided with a first conduit 2253, and the exhaust port 2252 is provided with a second conduit 2254.

Wherein, after the first conduit 2253 is inserted onto the injection port 2251, a UV glue 2255 may be applied to the outside of the injection port 2251 to seal the gap between the first conduit 2253 and the injection port 2251; after the second conduit 2254 is inserted over the exhaust port 2252, UV glue 2255 may be applied to the outside of the injection port 2251 to seal the gap between the first conduit 2253 and the injection port 2251.

Wherein the tube diameter of the first conduit 2253 on the injection port 2251 and the tube diameter of the second conduit 2254 on the exhaust port 2252 may be the same or different; the first conduit 2253 has a tube diameter of 0.1mm to 0.8mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., which are not specifically recited herein; of course, the tube diameter of the first conduit 2253 may also be less than 0.1mm or greater than 0.8mm; the second conduit 2254 has a tube diameter of 0.1mm to 0.8mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., which is not specifically recited herein; of course, the diameter of the second conduit 2254 may also be less than 0.1mm or greater than 0.8mm, as the application is not limited in this regard.

The material of the first conduit 2253 is, for example, a polymer material or a metal material such as polytetrafluoroethylene, polyolefin, polyurethane, nylon, etc.; the second conduit 2254 is made of a polymer material such as polytetrafluoroethylene, polyolefin, polyurethane, nylon, or a metal material. Wherein the material of the first conduit 2253 may be the same as or different from the material of the second conduit 2254.

Specifically, as shown in fig. 18, an injection assembly is provided, which is connected to the first conduit 2253 on the injection port 2251, and liquid crystal is injected into the accommodation space 23 through the injection assembly.

As shown in fig. 18, the injection assembly includes a first vacuum pump 31, a first filter 32, a first solenoid valve 33, a liquid crystal tank 34, a second solenoid valve 35, a plunger pump 36, a third solenoid valve 37, and a first connector 38, which are sequentially connected.

Specifically, as shown in FIG. 8, a pumping assembly is provided that connects the pumping assembly with a second conduit 2254 on two exhaust vents 2252.

As shown in fig. 18, the air extraction assembly includes a second vacuum pump 41, a second filter 42, a fourth electromagnetic valve 43 and a second connector 45, which are sequentially connected, and a pressure gauge 44 is disposed on a pipeline connected with the fourth electromagnetic valve 43 and the second connector 45.

The liquid crystal injection process comprises the following steps: the first connector 38 is in communication with a first conduit 2253 on the injection port 2251, and the two second connectors 45 are in communication with second conduits 2254 on the two exhaust ports 2252, respectively; closing the second electromagnetic valve 35, opening the first electromagnetic valve 33, opening the first vacuum pump 31, and defoaming liquid crystal through the liquid crystal tank 34; closing the first electromagnetic valve 33, the second electromagnetic valve 35 and the third electromagnetic valve 37, opening the fourth electromagnetic valve 43, vacuumizing the accommodating space 23 through the second vacuum pump 41, and closing the fourth electromagnetic valve 43 after the accommodating space 23 reaches a preset vacuum degree; wherein, the preset vacuum degree can be 1Pa, and the vacuum degree can be observed through the pressure gauge 44; of course, the preset vacuum degree may be 0.5Pa, 1.5Pa, 2Pa, etc., which is not limited in the present application. Then, the first solenoid valve 33 and the fourth solenoid valve 43 are closed, the second solenoid valve 35 and the rotary valve of the plunger pump 36 are opened, and the liquid crystal is sucked into the plunger pump 36 by the plunger rise of the plunger pump 36; after the liquid crystal is sucked into the plunger pump 36, the rotary valve of the plunger pump 36 and the second solenoid valve 35 are closed, then the third solenoid valve 37 is opened, the liquid crystal is injected into the accommodation space 23 by the plunger of the plunger pump 36 being lowered, and the solenoid valve is closed after the accommodation space 23 is filled with the liquid crystal. Wherein, the injection amount of the liquid crystal can be precisely controlled by the plunger pump 36; the larger the pipe diameter of the first conduit 2253 is, the higher the crystal injection efficiency is.

Wherein the connection of the first connector 38 to the first conduit 2253 is achieved by inserting the first conduit 2253 into the first connector 38; separation of the first connector 38 from the first conduit 2253 is achieved by pulling the first conduit 2253 out of the first connector 38; of course, those skilled in the art may also use other connection methods, and the disclosure is not limited thereto, and any solution involving up-conversion of the connection method of the first connector 38 and the first conduit 2253 falls within the scope of the disclosure.

Wherein the second connector 45 is connected to the second conduit 2254 in the same manner as the first connector 38 is connected to the first conduit 2253. Of course, other connection methods may be used for the second connector 45 and the second conduit 2254, which is not limited by the present disclosure.

The injection assembly further comprises: the heater is configured to heat the liquid crystal tank 34, thereby heating the dye liquid crystal, reducing the viscosity thereof, shortening the liquid crystal injection time, and further improving the crystal injection efficiency.

In one embodiment, as shown in fig. 19-22, the frame sealing glue 225 of the liquid crystal blank 20 is formed with one injection port 2251 and two, three or four exhaust ports 2252, wherein the injection port 2251 is provided with a first conduit 2253.

Wherein, after the first conduit 2253 is inserted onto the injection port 2251, UV glue 2255 may be applied to the outside of the injection port 2251 to seal the gap between the first conduit 2253 and the injection port 2251.

Wherein the first conduit 2253 has a tube diameter of 0.1mm to 0.8mm, such as 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., which are not specifically recited herein, but are not limiting of the present disclosure.

The material of the first conduit 2253 is, for example, a polymer material or a metal material such as polytetrafluoroethylene, polyolefin, polyurethane, nylon, etc.

Specifically, as shown in fig. 23, an injection assembly is provided, which is connected to the first conduit 2253 on the injection port 2251, and liquid crystal is injected into the accommodation space 23 through the injection assembly.

As shown in fig. 23, the injection assembly includes a first vacuum pump 31, a first filter 32, a first solenoid valve 33, a liquid crystal tank 34, a second solenoid valve 35, a plunger pump 36, a third solenoid valve 37, and a first connector 38, which are sequentially connected.

The liquid crystal injection process comprises the following steps: communicating the first connector 38 with a first conduit 2253 on the injection port 2251; closing the second electromagnetic valve 35, opening the first electromagnetic valve 33, opening the first vacuum pump 31, and defoaming liquid crystal through the liquid crystal tank 34; then, the first electromagnetic valve 33 is closed, the second electromagnetic valve 35 and the rotary valve of the plunger pump 36 are opened, and the liquid crystal is sucked into the plunger pump 36 by the plunger rise of the plunger pump 36; after the liquid crystal is sucked into the plunger pump 36, the rotary valve of the plunger pump 36 and the second solenoid valve 35 are closed, then the third solenoid valve 37 is opened, the liquid crystal is injected into the accommodation space 23 by the plunger of the plunger pump 36 being lowered, and the solenoid valve is closed after the accommodation space 23 is filled with the liquid crystal. Wherein, the injection amount of the liquid crystal can be precisely controlled by the plunger pump 36; the larger the pipe diameter of the first conduit 2253 is, the higher the crystal injection efficiency is.

The injection assembly further comprises: the heater is configured to heat the liquid crystal tank 34, thereby heating the dye liquid crystal, reducing the viscosity thereof, shortening the liquid crystal injection time, and further improving the crystal injection efficiency.

In step S300, after the liquid crystal fills the accommodating space, at least one injection port and at least one exhaust port are blocked.

Specifically, after the completion of the injection, if there is no conduit on the injection port 2251 and the exhaust port 2252, the injection port 2251 and the exhaust port 2252 are sealed with UV glue.

If the injection port 2251 and the exhaust port 2252 are provided with conduits, the UV glue 2255 on the injection port 2251 and the exhaust port 2252 is removed, the conduits are pulled out, and the UV glue is applied to seal the injection port 2251 and the exhaust port 2252.

It should be noted that although the steps of the methods of the present disclosure are illustrated in a particular order in the figures, this does not require or imply that the steps must be performed in that particular order or that all of the illustrated steps must be performed in order to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step to perform, and/or one step decomposed into multiple steps to perform, etc.

The embodiments of the present disclosure also provide a liquid crystal cell manufactured by the manufacturing method of the above embodiment, and the advantageous effects thereof may be referred to the advantageous effects of the manufacturing method described above, and will not be described in detail herein.

Embodiments of the present disclosure also provide a light modulation film including the liquid crystal cell obtained by the above-described manufacturing method. The light-adjusting film can be a flexible light-adjusting film, and can be applied to display screens, automobile backdrop, automobile doors and windows, indoor glass and the like, and the beneficial effects of the manufacturing method can be referred to, and the detailed description is omitted.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A method of manufacturing a liquid crystal cell, comprising:

Providing a liquid crystal empty box, wherein the liquid crystal empty box comprises an upper substrate and a lower substrate, the upper substrate and the lower substrate are arranged in a box-to-box manner through frame sealing glue, and the upper substrate, the lower substrate and the frame sealing glue are enclosed to form an accommodating space for accommodating liquid crystal; wherein, at least one injection port and at least one exhaust port which are communicated with the accommodating space are formed on the frame sealing adhesive;

Injecting liquid crystal into the accommodating space through the at least one injection port, and discharging gas in the accommodating space through the at least one exhaust port;

and after the liquid crystal fills the accommodating space, the at least one injection port and the at least one exhaust port are blocked.

2. The manufacturing method according to claim 1, wherein injecting liquid crystal into the accommodation space through the at least one injection port includes:

Providing an injection assembly, connecting the injection assembly with the at least one injection port, and injecting liquid crystal into the accommodating space through the injection assembly.

3. The method of manufacturing according to claim 2, wherein the liquid crystal cell further comprises:

A first conduit disposed over the injection port; the injection assembly is connected with the first conduit, and liquid crystal is injected into the accommodating space through the first conduit.

4. The method of manufacturing according to claim 2, wherein the injection assembly comprises a first vacuum pump, a first filter, a first solenoid valve, a liquid crystal cell, a second solenoid valve, a plunger pump, a third solenoid valve, and a first connector connected in sequence;

Wherein injecting liquid crystal into the accommodation space through the injection assembly includes: closing the second electromagnetic valve, opening the first vacuum pump, and defoaming liquid crystal through the liquid crystal tank; then, opening the second electromagnetic valve and a rotary valve of the plunger pump, and sucking liquid crystal into the plunger pump by lifting a plunger of the plunger pump; after liquid crystal is sucked into the plunger pump, the rotary valve of the plunger pump and the second electromagnetic valve are closed, then the third electromagnetic valve is opened, the liquid crystal is injected into the accommodating space through the descending of the plunger pump, and the electromagnetic valve is closed after the accommodating space is filled with the liquid crystal.

5. The method of manufacturing of claim 4, wherein the injection assembly further comprises:

A heater configured to heat the liquid crystal cell.

6. The manufacturing method according to claim 2, wherein discharging the gas in the accommodation space through the at least one gas outlet includes:

Providing an air extraction assembly, and connecting the air extraction assembly with the at least one air outlet;

Closing the at least one injection port by an injection assembly;

After closing the at least one injection port, a vacuum is drawn on the receiving space through the pumping assembly.

7. The method of manufacturing according to claim 6, wherein the liquid crystal cell further comprises:

The second conduit is arranged on the exhaust port; the air extraction assembly is connected with the second conduit, and the accommodating space is vacuumized through the second conduit.

8. The manufacturing method according to claim 6, wherein the air extraction assembly comprises a second vacuum pump, a second filter, a fourth electromagnetic valve and a second connector which are sequentially connected, and a pressure gauge is arranged on a pipeline connected with the fourth electromagnetic valve and the second connector;

wherein, through the bleed subassembly to the accommodation space evacuation includes: and opening the fourth electromagnetic valve, vacuumizing the accommodating space through the second vacuum pump, and closing the fourth electromagnetic valve after the accommodating space reaches a preset vacuum degree.

9. A liquid crystal cell formed by the manufacturing method according to any one of claims 1 to 8.

10. A light adjusting film comprising the liquid crystal cell of claim 9.